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Author SHA1 Message Date
Greg Kroah-Hartman
d1253c75a8 This is the 4.19.155 stable release
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Merge 4.19.155 into android-4.19-stable

Changes in 4.19.155
	objtool: Support Clang non-section symbols in ORC generation
	scripts/setlocalversion: make git describe output more reliable
	arm64: Run ARCH_WORKAROUND_1 enabling code on all CPUs
	arm64: link with -z norelro regardless of CONFIG_RELOCATABLE
	x86/PCI: Fix intel_mid_pci.c build error when ACPI is not enabled
	efivarfs: Replace invalid slashes with exclamation marks in dentries.
	chelsio/chtls: fix deadlock issue
	chelsio/chtls: fix memory leaks in CPL handlers
	chelsio/chtls: fix tls record info to user
	gtp: fix an use-before-init in gtp_newlink()
	mlxsw: core: Fix memory leak on module removal
	netem: fix zero division in tabledist
	ravb: Fix bit fields checking in ravb_hwtstamp_get()
	tcp: Prevent low rmem stalls with SO_RCVLOWAT.
	tipc: fix memory leak caused by tipc_buf_append()
	r8169: fix issue with forced threading in combination with shared interrupts
	cxgb4: set up filter action after rewrites
	arch/x86/amd/ibs: Fix re-arming IBS Fetch
	x86/xen: disable Firmware First mode for correctable memory errors
	fuse: fix page dereference after free
	bpf: Fix comment for helper bpf_current_task_under_cgroup()
	evm: Check size of security.evm before using it
	p54: avoid accessing the data mapped to streaming DMA
	cxl: Rework error message for incompatible slots
	RDMA/addr: Fix race with netevent_callback()/rdma_addr_cancel()
	mtd: lpddr: Fix bad logic in print_drs_error
	serial: pl011: Fix lockdep splat when handling magic-sysrq interrupt
	ata: sata_rcar: Fix DMA boundary mask
	fscrypt: return -EXDEV for incompatible rename or link into encrypted dir
	fscrypt: clean up and improve dentry revalidation
	fscrypt: fix race allowing rename() and link() of ciphertext dentries
	fs, fscrypt: clear DCACHE_ENCRYPTED_NAME when unaliasing directory
	fscrypt: only set dentry_operations on ciphertext dentries
	fscrypt: fix race where ->lookup() marks plaintext dentry as ciphertext
	Revert "block: ratelimit handle_bad_sector() message"
	xen/events: don't use chip_data for legacy IRQs
	xen/events: avoid removing an event channel while handling it
	xen/events: add a proper barrier to 2-level uevent unmasking
	xen/events: fix race in evtchn_fifo_unmask()
	xen/events: add a new "late EOI" evtchn framework
	xen/blkback: use lateeoi irq binding
	xen/netback: use lateeoi irq binding
	xen/scsiback: use lateeoi irq binding
	xen/pvcallsback: use lateeoi irq binding
	xen/pciback: use lateeoi irq binding
	xen/events: switch user event channels to lateeoi model
	xen/events: use a common cpu hotplug hook for event channels
	xen/events: defer eoi in case of excessive number of events
	xen/events: block rogue events for some time
	x86/unwind/orc: Fix inactive tasks with stack pointer in %sp on GCC 10 compiled kernels
	mlxsw: core: Fix use-after-free in mlxsw_emad_trans_finish()
	RDMA/qedr: Fix memory leak in iWARP CM
	ata: sata_nv: Fix retrieving of active qcs
	futex: Fix incorrect should_fail_futex() handling
	powerpc/powernv/smp: Fix spurious DBG() warning
	mm: fix exec activate_mm vs TLB shootdown and lazy tlb switching race
	powerpc: select ARCH_WANT_IRQS_OFF_ACTIVATE_MM
	sparc64: remove mm_cpumask clearing to fix kthread_use_mm race
	f2fs: add trace exit in exception path
	f2fs: fix uninit-value in f2fs_lookup
	f2fs: fix to check segment boundary during SIT page readahead
	um: change sigio_spinlock to a mutex
	ARM: 8997/2: hw_breakpoint: Handle inexact watchpoint addresses
	power: supply: bq27xxx: report "not charging" on all types
	xfs: fix realtime bitmap/summary file truncation when growing rt volume
	video: fbdev: pvr2fb: initialize variables
	ath10k: start recovery process when payload length exceeds max htc length for sdio
	ath10k: fix VHT NSS calculation when STBC is enabled
	drm/brige/megachips: Add checking if ge_b850v3_lvds_init() is working correctly
	media: videodev2.h: RGB BT2020 and HSV are always full range
	media: platform: Improve queue set up flow for bug fixing
	usb: typec: tcpm: During PR_SWAP, source caps should be sent only after tSwapSourceStart
	media: tw5864: check status of tw5864_frameinterval_get
	media: imx274: fix frame interval handling
	mmc: via-sdmmc: Fix data race bug
	drm/bridge/synopsys: dsi: add support for non-continuous HS clock
	arm64: topology: Stop using MPIDR for topology information
	printk: reduce LOG_BUF_SHIFT range for H8300
	ia64: kprobes: Use generic kretprobe trampoline handler
	kgdb: Make "kgdbcon" work properly with "kgdb_earlycon"
	media: uvcvideo: Fix dereference of out-of-bound list iterator
	riscv: Define AT_VECTOR_SIZE_ARCH for ARCH_DLINFO
	cpufreq: sti-cpufreq: add stih418 support
	USB: adutux: fix debugging
	uio: free uio id after uio file node is freed
	usb: xhci: omit duplicate actions when suspending a runtime suspended host.
	arm64/mm: return cpu_all_mask when node is NUMA_NO_NODE
	xfs: don't free rt blocks when we're doing a REMAP bunmapi call
	ACPI: Add out of bounds and numa_off protections to pxm_to_node()
	drivers/net/wan/hdlc_fr: Correctly handle special skb->protocol values
	bus/fsl_mc: Do not rely on caller to provide non NULL mc_io
	power: supply: test_power: add missing newlines when printing parameters by sysfs
	drm/amd/display: HDMI remote sink need mode validation for Linux
	btrfs: fix replace of seed device
	md/bitmap: md_bitmap_get_counter returns wrong blocks
	bnxt_en: Log unknown link speed appropriately.
	rpmsg: glink: Use complete_all for open states
	clk: ti: clockdomain: fix static checker warning
	net: 9p: initialize sun_server.sun_path to have addr's value only when addr is valid
	drivers: watchdog: rdc321x_wdt: Fix race condition bugs
	ext4: Detect already used quota file early
	gfs2: add validation checks for size of superblock
	cifs: handle -EINTR in cifs_setattr
	arm64: dts: renesas: ulcb: add full-pwr-cycle-in-suspend into eMMC nodes
	ARM: dts: omap4: Fix sgx clock rate for 4430
	memory: emif: Remove bogus debugfs error handling
	ARM: dts: s5pv210: remove DMA controller bus node name to fix dtschema warnings
	ARM: dts: s5pv210: move PMU node out of clock controller
	ARM: dts: s5pv210: remove dedicated 'audio-subsystem' node
	nbd: make the config put is called before the notifying the waiter
	sgl_alloc_order: fix memory leak
	nvme-rdma: fix crash when connect rejected
	md/raid5: fix oops during stripe resizing
	mmc: sdhci-acpi: AMDI0040: Set SDHCI_QUIRK2_PRESET_VALUE_BROKEN
	perf/x86/amd/ibs: Don't include randomized bits in get_ibs_op_count()
	perf/x86/amd/ibs: Fix raw sample data accumulation
	leds: bcm6328, bcm6358: use devres LED registering function
	media: uvcvideo: Fix uvc_ctrl_fixup_xu_info() not having any effect
	fs: Don't invalidate page buffers in block_write_full_page()
	NFS: fix nfs_path in case of a rename retry
	ACPI: button: fix handling lid state changes when input device closed
	ACPI / extlog: Check for RDMSR failure
	ACPI: video: use ACPI backlight for HP 635 Notebook
	ACPI: debug: don't allow debugging when ACPI is disabled
	acpi-cpufreq: Honor _PSD table setting on new AMD CPUs
	w1: mxc_w1: Fix timeout resolution problem leading to bus error
	scsi: mptfusion: Fix null pointer dereferences in mptscsih_remove()
	scsi: qla2xxx: Fix crash on session cleanup with unload
	btrfs: qgroup: fix wrong qgroup metadata reserve for delayed inode
	btrfs: improve device scanning messages
	btrfs: reschedule if necessary when logging directory items
	btrfs: send, recompute reference path after orphanization of a directory
	btrfs: use kvzalloc() to allocate clone_roots in btrfs_ioctl_send()
	btrfs: cleanup cow block on error
	btrfs: fix use-after-free on readahead extent after failure to create it
	usb: xhci: Workaround for S3 issue on AMD SNPS 3.0 xHC
	usb: dwc3: ep0: Fix ZLP for OUT ep0 requests
	usb: dwc3: gadget: Check MPS of the request length
	usb: dwc3: core: add phy cleanup for probe error handling
	usb: dwc3: core: don't trigger runtime pm when remove driver
	usb: cdc-acm: fix cooldown mechanism
	usb: typec: tcpm: reset hard_reset_count for any disconnect
	usb: host: fsl-mph-dr-of: check return of dma_set_mask()
	drm/i915: Force VT'd workarounds when running as a guest OS
	vt: keyboard, simplify vt_kdgkbsent
	vt: keyboard, extend func_buf_lock to readers
	HID: wacom: Avoid entering wacom_wac_pen_report for pad / battery
	udf: Fix memory leak when mounting
	dmaengine: dma-jz4780: Fix race in jz4780_dma_tx_status
	iio:light:si1145: Fix timestamp alignment and prevent data leak.
	iio:adc:ti-adc0832 Fix alignment issue with timestamp
	iio:adc:ti-adc12138 Fix alignment issue with timestamp
	iio:gyro:itg3200: Fix timestamp alignment and prevent data leak.
	powerpc/drmem: Make lmb_size 64 bit
	s390/stp: add locking to sysfs functions
	powerpc/rtas: Restrict RTAS requests from userspace
	powerpc: Warn about use of smt_snooze_delay
	powerpc/powernv/elog: Fix race while processing OPAL error log event.
	powerpc: Fix undetected data corruption with P9N DD2.1 VSX CI load emulation
	NFSv4.2: support EXCHGID4_FLAG_SUPP_FENCE_OPS 4.2 EXCHANGE_ID flag
	NFSD: Add missing NFSv2 .pc_func methods
	ubifs: dent: Fix some potential memory leaks while iterating entries
	perf python scripting: Fix printable strings in python3 scripts
	ubi: check kthread_should_stop() after the setting of task state
	ia64: fix build error with !COREDUMP
	i2c: imx: Fix external abort on interrupt in exit paths
	drm/amdgpu: don't map BO in reserved region
	drm/amd/display: Don't invoke kgdb_breakpoint() unconditionally
	ceph: promote to unsigned long long before shifting
	libceph: clear con->out_msg on Policy::stateful_server faults
	9P: Cast to loff_t before multiplying
	ring-buffer: Return 0 on success from ring_buffer_resize()
	vringh: fix __vringh_iov() when riov and wiov are different
	ext4: fix leaking sysfs kobject after failed mount
	ext4: fix error handling code in add_new_gdb
	ext4: fix invalid inode checksum
	drm/ttm: fix eviction valuable range check.
	rtc: rx8010: don't modify the global rtc ops
	tty: make FONTX ioctl use the tty pointer they were actually passed
	arm64: berlin: Select DW_APB_TIMER_OF
	cachefiles: Handle readpage error correctly
	hil/parisc: Disable HIL driver when it gets stuck
	arm: dts: mt7623: add missing pause for switchport
	ARM: samsung: fix PM debug build with DEBUG_LL but !MMU
	ARM: s3c24xx: fix missing system reset
	device property: Keep secondary firmware node secondary by type
	device property: Don't clear secondary pointer for shared primary firmware node
	KVM: arm64: Fix AArch32 handling of DBGD{CCINT,SCRext} and DBGVCR
	staging: comedi: cb_pcidas: Allow 2-channel commands for AO subdevice
	staging: octeon: repair "fixed-link" support
	staging: octeon: Drop on uncorrectable alignment or FCS error
	Linux 4.19.155

Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>
Change-Id: I18fefb5bfaa4d05772c61c2975340d0f089b8e3e
2020-11-05 14:02:27 +01:00
Darrick J. Wong
451a7c74c2 xfs: don't free rt blocks when we're doing a REMAP bunmapi call
[ Upstream commit 8df0fa39bdd86ca81a8d706a6ed9d33cc65ca625 ]

When callers pass XFS_BMAPI_REMAP into xfs_bunmapi, they want the extent
to be unmapped from the given file fork without the extent being freed.
We do this for non-rt files, but we forgot to do this for realtime
files.  So far this isn't a big deal since nobody makes a bunmapi call
to a rt file with the REMAP flag set, but don't leave a logic bomb.

Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Dave Chinner <dchinner@redhat.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
2020-11-05 11:08:42 +01:00
Darrick J. Wong
bda64b4356 xfs: fix realtime bitmap/summary file truncation when growing rt volume
[ Upstream commit f4c32e87de7d66074d5612567c5eac7325024428 ]

The realtime bitmap and summary files are regular files that are hidden
away from the directory tree.  Since they're regular files, inode
inactivation will try to purge what it thinks are speculative
preallocations beyond the incore size of the file.  Unfortunately,
xfs_growfs_rt forgets to update the incore size when it resizes the
inodes, with the result that inactivating the rt inodes at unmount time
will cause their contents to be truncated.

Fix this by updating the incore size when we change the ondisk size as
part of updating the superblock.  Note that we don't do this when we're
allocating blocks to the rt inodes because we actually want those blocks
to get purged if the growfs fails.

This fixes corruption complaints from the online rtsummary checker when
running xfs/233.  Since that test requires rmap, one can also trigger
this by growing an rt volume, cycling the mount, and creating rt files.

Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com>
Reviewed-by: Chandan Babu R <chandanrlinux@gmail.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
2020-11-05 11:08:39 +01:00
Greg Kroah-Hartman
ac43e7e5e4 This is the 4.19.154 stable release
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Merge 4.19.154 into android-4.19-stable

Changes in 4.19.154
	powerpc/tau: Check processor type before enabling TAU interrupt
	powerpc/tau: Disable TAU between measurements
	powerpc/64s/radix: Fix mm_cpumask trimming race vs kthread_use_mm
	RDMA/cma: Remove dead code for kernel rdmacm multicast
	RDMA/cma: Consolidate the destruction of a cma_multicast in one place
	perf intel-pt: Fix "context_switch event has no tid" error
	RDMA/hns: Set the unsupported wr opcode
	RDMA/hns: Fix missing sq_sig_type when querying QP
	kdb: Fix pager search for multi-line strings
	overflow: Include header file with SIZE_MAX declaration
	powerpc/perf: Exclude pmc5/6 from the irrelevant PMU group constraints
	powerpc/perf/hv-gpci: Fix starting index value
	cpufreq: powernv: Fix frame-size-overflow in powernv_cpufreq_reboot_notifier
	IB/rdmavt: Fix sizeof mismatch
	f2fs: wait for sysfs kobject removal before freeing f2fs_sb_info
	lib/crc32.c: fix trivial typo in preprocessor condition
	ramfs: fix nommu mmap with gaps in the page cache
	rapidio: fix error handling path
	rapidio: fix the missed put_device() for rio_mport_add_riodev
	mailbox: avoid timer start from callback
	i2c: rcar: Auto select RESET_CONTROLLER
	PCI: iproc: Set affinity mask on MSI interrupts
	rpmsg: smd: Fix a kobj leak in in qcom_smd_parse_edge()
	pwm: img: Fix null pointer access in probe
	clk: rockchip: Initialize hw to error to avoid undefined behavior
	clk: at91: clk-main: update key before writing AT91_CKGR_MOR
	clk: bcm2835: add missing release if devm_clk_hw_register fails
	watchdog: Fix memleak in watchdog_cdev_register
	watchdog: Use put_device on error
	watchdog: sp5100: Fix definition of EFCH_PM_DECODEEN3
	svcrdma: fix bounce buffers for unaligned offsets and multiple pages
	ext4: limit entries returned when counting fsmap records
	vfio/pci: Clear token on bypass registration failure
	vfio iommu type1: Fix memory leak in vfio_iommu_type1_pin_pages
	SUNRPC: fix copying of multiple pages in gss_read_proxy_verf()
	Input: imx6ul_tsc - clean up some errors in imx6ul_tsc_resume()
	Input: stmfts - fix a & vs && typo
	Input: ep93xx_keypad - fix handling of platform_get_irq() error
	Input: omap4-keypad - fix handling of platform_get_irq() error
	Input: twl4030_keypad - fix handling of platform_get_irq() error
	Input: sun4i-ps2 - fix handling of platform_get_irq() error
	KVM: x86: emulating RDPID failure shall return #UD rather than #GP
	netfilter: conntrack: connection timeout after re-register
	netfilter: nf_fwd_netdev: clear timestamp in forwarding path
	ARM: dts: imx6sl: fix rng node
	ARM: dts: sun8i: r40: bananapi-m2-ultra: Fix dcdc1 regulator
	memory: omap-gpmc: Fix a couple off by ones
	memory: omap-gpmc: Fix build error without CONFIG_OF
	memory: fsl-corenet-cf: Fix handling of platform_get_irq() error
	arm64: dts: qcom: pm8916: Remove invalid reg size from wcd_codec
	arm64: dts: qcom: msm8916: Fix MDP/DSI interrupts
	ARM: dts: owl-s500: Fix incorrect PPI interrupt specifiers
	arm64: dts: zynqmp: Remove additional compatible string for i2c IPs
	powerpc/powernv/dump: Fix race while processing OPAL dump
	nvmet: fix uninitialized work for zero kato
	NTB: hw: amd: fix an issue about leak system resources
	sched/features: Fix !CONFIG_JUMP_LABEL case
	perf: correct SNOOPX field offset
	i2c: core: Restore acpi_walk_dep_device_list() getting called after registering the ACPI i2c devs
	block: ratelimit handle_bad_sector() message
	crypto: ccp - fix error handling
	media: firewire: fix memory leak
	media: ati_remote: sanity check for both endpoints
	media: st-delta: Fix reference count leak in delta_run_work
	media: sti: Fix reference count leaks
	media: exynos4-is: Fix several reference count leaks due to pm_runtime_get_sync
	media: exynos4-is: Fix a reference count leak due to pm_runtime_get_sync
	media: exynos4-is: Fix a reference count leak
	media: vsp1: Fix runtime PM imbalance on error
	media: platform: s3c-camif: Fix runtime PM imbalance on error
	media: platform: sti: hva: Fix runtime PM imbalance on error
	media: bdisp: Fix runtime PM imbalance on error
	media: media/pci: prevent memory leak in bttv_probe
	media: uvcvideo: Ensure all probed info is returned to v4l2
	mmc: sdio: Check for CISTPL_VERS_1 buffer size
	media: saa7134: avoid a shift overflow
	fs: dlm: fix configfs memory leak
	media: venus: core: Fix runtime PM imbalance in venus_probe
	ntfs: add check for mft record size in superblock
	ip_gre: set dev->hard_header_len and dev->needed_headroom properly
	mac80211: handle lack of sband->bitrates in rates
	PM: hibernate: remove the bogus call to get_gendisk() in software_resume()
	scsi: mvumi: Fix error return in mvumi_io_attach()
	scsi: target: core: Add CONTROL field for trace events
	mic: vop: copy data to kernel space then write to io memory
	misc: vop: add round_up(x,4) for vring_size to avoid kernel panic
	usb: gadget: function: printer: fix use-after-free in __lock_acquire
	udf: Limit sparing table size
	udf: Avoid accessing uninitialized data on failed inode read
	USB: cdc-acm: handle broken union descriptors
	usb: dwc3: simple: add support for Hikey 970
	can: flexcan: flexcan_chip_stop(): add error handling and propagate error value
	ath9k: hif_usb: fix race condition between usb_get_urb() and usb_kill_anchored_urbs()
	misc: rtsx: Fix memory leak in rtsx_pci_probe
	reiserfs: only call unlock_new_inode() if I_NEW
	xfs: make sure the rt allocator doesn't run off the end
	usb: ohci: Default to per-port over-current protection
	Bluetooth: Only mark socket zapped after unlocking
	scsi: ibmvfc: Fix error return in ibmvfc_probe()
	brcmsmac: fix memory leak in wlc_phy_attach_lcnphy
	rtl8xxxu: prevent potential memory leak
	Fix use after free in get_capset_info callback.
	scsi: qedi: Protect active command list to avoid list corruption
	scsi: qedi: Fix list_del corruption while removing active I/O
	tty: ipwireless: fix error handling
	ipvs: Fix uninit-value in do_ip_vs_set_ctl()
	reiserfs: Fix memory leak in reiserfs_parse_options()
	mwifiex: don't call del_timer_sync() on uninitialized timer
	brcm80211: fix possible memleak in brcmf_proto_msgbuf_attach
	usb: core: Solve race condition in anchor cleanup functions
	scsi: ufs: ufs-qcom: Fix race conditions caused by ufs_qcom_testbus_config()
	ath10k: check idx validity in __ath10k_htt_rx_ring_fill_n()
	net: korina: cast KSEG0 address to pointer in kfree
	tty: serial: fsl_lpuart: fix lpuart32_poll_get_char
	usb: cdc-acm: add quirk to blacklist ETAS ES58X devices
	USB: cdc-wdm: Make wdm_flush() interruptible and add wdm_fsync().
	eeprom: at25: set minimum read/write access stride to 1
	usb: gadget: f_ncm: allow using NCM in SuperSpeed Plus gadgets.
	Linux 4.19.154

Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>
Change-Id: I242a1afee6c5297423afd0f11e81f9a9f14ded77
2020-10-30 11:43:26 +01:00
Darrick J. Wong
e004f8f381 xfs: make sure the rt allocator doesn't run off the end
[ Upstream commit 2a6ca4baed620303d414934aa1b7b0a8e7bab05f ]

There's an overflow bug in the realtime allocator.  If the rt volume is
large enough to handle a single allocation request that is larger than
the maximum bmap extent length and the rt bitmap ends exactly on a
bitmap block boundary, it's possible that the near allocator will try to
check the freeness of a range that extends past the end of the bitmap.
This fails with a corruption error and shuts down the fs.

Therefore, constrain maxlen so that the range scan cannot run off the
end of the rt bitmap.

Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Sasha Levin <sashal@kernel.org>
2020-10-30 10:38:30 +01:00
Greg Kroah-Hartman
b9a942466b This is the 4.19.153 stable release
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Merge 4.19.153 into android-4.19-stable

Changes in 4.19.153
	ibmveth: Switch order of ibmveth_helper calls.
	ibmveth: Identify ingress large send packets.
	ipv4: Restore flowi4_oif update before call to xfrm_lookup_route
	mlx4: handle non-napi callers to napi_poll
	net: fec: Fix phy_device lookup for phy_reset_after_clk_enable()
	net: fec: Fix PHY init after phy_reset_after_clk_enable()
	net: fix pos incrementment in ipv6_route_seq_next
	net/smc: fix valid DMBE buffer sizes
	net: usb: qmi_wwan: add Cellient MPL200 card
	tipc: fix the skb_unshare() in tipc_buf_append()
	net/ipv4: always honour route mtu during forwarding
	r8169: fix data corruption issue on RTL8402
	net/tls: sendfile fails with ktls offload
	binder: fix UAF when releasing todo list
	ALSA: bebob: potential info leak in hwdep_read()
	chelsio/chtls: fix socket lock
	chelsio/chtls: correct netdevice for vlan interface
	chelsio/chtls: correct function return and return type
	net: hdlc: In hdlc_rcv, check to make sure dev is an HDLC device
	net: hdlc_raw_eth: Clear the IFF_TX_SKB_SHARING flag after calling ether_setup
	net/sched: act_tunnel_key: fix OOB write in case of IPv6 ERSPAN tunnels
	nfc: Ensure presence of NFC_ATTR_FIRMWARE_NAME attribute in nfc_genl_fw_download()
	tcp: fix to update snd_wl1 in bulk receiver fast path
	r8169: fix operation under forced interrupt threading
	icmp: randomize the global rate limiter
	ALSA: hda/realtek: Enable audio jacks of ASUS D700SA with ALC887
	cifs: remove bogus debug code
	cifs: Return the error from crypt_message when enc/dec key not found.
	KVM: x86/mmu: Commit zap of remaining invalid pages when recovering lpages
	KVM: SVM: Initialize prev_ga_tag before use
	ima: Don't ignore errors from crypto_shash_update()
	crypto: algif_aead - Do not set MAY_BACKLOG on the async path
	EDAC/i5100: Fix error handling order in i5100_init_one()
	EDAC/ti: Fix handling of platform_get_irq() error
	x86/fpu: Allow multiple bits in clearcpuid= parameter
	drivers/perf: xgene_pmu: Fix uninitialized resource struct
	x86/nmi: Fix nmi_handle() duration miscalculation
	x86/events/amd/iommu: Fix sizeof mismatch
	crypto: algif_skcipher - EBUSY on aio should be an error
	crypto: mediatek - Fix wrong return value in mtk_desc_ring_alloc()
	crypto: ixp4xx - Fix the size used in a 'dma_free_coherent()' call
	crypto: picoxcell - Fix potential race condition bug
	media: tuner-simple: fix regression in simple_set_radio_freq
	media: Revert "media: exynos4-is: Add missed check for pinctrl_lookup_state()"
	media: m5mols: Check function pointer in m5mols_sensor_power
	media: uvcvideo: Set media controller entity functions
	media: uvcvideo: Silence shift-out-of-bounds warning
	media: omap3isp: Fix memleak in isp_probe
	crypto: omap-sham - fix digcnt register handling with export/import
	hwmon: (pmbus/max34440) Fix status register reads for MAX344{51,60,61}
	cypto: mediatek - fix leaks in mtk_desc_ring_alloc
	media: mx2_emmaprp: Fix memleak in emmaprp_probe
	media: tc358743: initialize variable
	media: tc358743: cleanup tc358743_cec_isr
	media: rcar-vin: Fix a reference count leak.
	media: rockchip/rga: Fix a reference count leak.
	media: platform: fcp: Fix a reference count leak.
	media: camss: Fix a reference count leak.
	media: s5p-mfc: Fix a reference count leak
	media: stm32-dcmi: Fix a reference count leak
	media: ti-vpe: Fix a missing check and reference count leak
	regulator: resolve supply after creating regulator
	pinctrl: bcm: fix kconfig dependency warning when !GPIOLIB
	spi: spi-s3c64xx: swap s3c64xx_spi_set_cs() and s3c64xx_enable_datapath()
	spi: spi-s3c64xx: Check return values
	ath10k: provide survey info as accumulated data
	Bluetooth: hci_uart: Cancel init work before unregistering
	ath6kl: prevent potential array overflow in ath6kl_add_new_sta()
	ath9k: Fix potential out of bounds in ath9k_htc_txcompletion_cb()
	ath10k: Fix the size used in a 'dma_free_coherent()' call in an error handling path
	wcn36xx: Fix reported 802.11n rx_highest rate wcn3660/wcn3680
	ASoC: qcom: lpass-platform: fix memory leak
	ASoC: qcom: lpass-cpu: fix concurrency issue
	brcmfmac: check ndev pointer
	mwifiex: Do not use GFP_KERNEL in atomic context
	staging: rtl8192u: Do not use GFP_KERNEL in atomic context
	drm/gma500: fix error check
	scsi: qla4xxx: Fix an error handling path in 'qla4xxx_get_host_stats()'
	scsi: qla2xxx: Fix wrong return value in qla_nvme_register_hba()
	scsi: csiostor: Fix wrong return value in csio_hw_prep_fw()
	backlight: sky81452-backlight: Fix refcount imbalance on error
	VMCI: check return value of get_user_pages_fast() for errors
	tty: serial: earlycon dependency
	tty: hvcs: Don't NULL tty->driver_data until hvcs_cleanup()
	pty: do tty_flip_buffer_push without port->lock in pty_write
	pwm: lpss: Fix off by one error in base_unit math in pwm_lpss_prepare()
	pwm: lpss: Add range limit check for the base_unit register value
	drivers/virt/fsl_hypervisor: Fix error handling path
	video: fbdev: vga16fb: fix setting of pixclock because a pass-by-value error
	video: fbdev: sis: fix null ptr dereference
	video: fbdev: radeon: Fix memleak in radeonfb_pci_register
	HID: roccat: add bounds checking in kone_sysfs_write_settings()
	pinctrl: mcp23s08: Fix mcp23x17_regmap initialiser
	pinctrl: mcp23s08: Fix mcp23x17 precious range
	net/mlx5: Don't call timecounter cyc2time directly from 1PPS flow
	net: stmmac: use netif_tx_start|stop_all_queues() function
	cpufreq: armada-37xx: Add missing MODULE_DEVICE_TABLE
	net: dsa: rtl8366: Check validity of passed VLANs
	net: dsa: rtl8366: Refactor VLAN/PVID init
	net: dsa: rtl8366: Skip PVID setting if not requested
	net: dsa: rtl8366rb: Support all 4096 VLANs
	ath6kl: wmi: prevent a shift wrapping bug in ath6kl_wmi_delete_pstream_cmd()
	misc: mic: scif: Fix error handling path
	ALSA: seq: oss: Avoid mutex lock for a long-time ioctl
	usb: dwc2: Fix parameter type in function pointer prototype
	quota: clear padding in v2r1_mem2diskdqb()
	slimbus: core: check get_addr before removing laddr ida
	slimbus: core: do not enter to clock pause mode in core
	slimbus: qcom-ngd-ctrl: disable ngd in qmi server down callback
	HID: hid-input: fix stylus battery reporting
	qtnfmac: fix resource leaks on unsupported iftype error return path
	net: enic: Cure the enic api locking trainwreck
	mfd: sm501: Fix leaks in probe()
	iwlwifi: mvm: split a print to avoid a WARNING in ROC
	usb: gadget: f_ncm: fix ncm_bitrate for SuperSpeed and above.
	usb: gadget: u_ether: enable qmult on SuperSpeed Plus as well
	nl80211: fix non-split wiphy information
	usb: dwc2: Fix INTR OUT transfers in DDMA mode.
	scsi: target: tcmu: Fix warning: 'page' may be used uninitialized
	scsi: be2iscsi: Fix a theoretical leak in beiscsi_create_eqs()
	platform/x86: mlx-platform: Remove PSU EEPROM configuration
	mwifiex: fix double free
	ipvs: clear skb->tstamp in forwarding path
	net: korina: fix kfree of rx/tx descriptor array
	netfilter: nf_log: missing vlan offload tag and proto
	mm/memcg: fix device private memcg accounting
	mm, oom_adj: don't loop through tasks in __set_oom_adj when not necessary
	IB/mlx4: Fix starvation in paravirt mux/demux
	IB/mlx4: Adjust delayed work when a dup is observed
	powerpc/pseries: Fix missing of_node_put() in rng_init()
	powerpc/icp-hv: Fix missing of_node_put() in success path
	RDMA/ucma: Fix locking for ctx->events_reported
	RDMA/ucma: Add missing locking around rdma_leave_multicast()
	mtd: lpddr: fix excessive stack usage with clang
	powerpc/pseries: explicitly reschedule during drmem_lmb list traversal
	mtd: mtdoops: Don't write panic data twice
	ARM: 9007/1: l2c: fix prefetch bits init in L2X0_AUX_CTRL using DT values
	arc: plat-hsdk: fix kconfig dependency warning when !RESET_CONTROLLER
	xfs: limit entries returned when counting fsmap records
	xfs: fix high key handling in the rt allocator's query_range function
	RDMA/qedr: Fix use of uninitialized field
	RDMA/qedr: Fix inline size returned for iWARP
	powerpc/tau: Use appropriate temperature sample interval
	powerpc/tau: Convert from timer to workqueue
	powerpc/tau: Remove duplicated set_thresholds() call
	Linux 4.19.153

Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>
Change-Id: I9e85e8ca67ab8e28d04a77339f80fdbf3c568956
2020-10-29 11:36:20 +01:00
Darrick J. Wong
dffa765748 xfs: fix high key handling in the rt allocator's query_range function
[ Upstream commit d88850bd5516a77c6f727e8b6cefb64e0cc929c7 ]

Fix some off-by-one errors in xfs_rtalloc_query_range.  The highest key
in the realtime bitmap is always one less than the number of rt extents,
which means that the key clamp at the start of the function is wrong.
The 4th argument to xfs_rtfind_forw is the highest rt extent that we
want to probe, which means that passing 1 less than the high key is
wrong.  Finally, drop the rem variable that controls the loop because we
can compare the iteration point (rtstart) against the high key directly.

The sordid history of this function is that the original commit (fb3c3)
incorrectly passed (high_rec->ar_startblock - 1) as the 'limit' parameter
to xfs_rtfind_forw.  This was wrong because the "high key" is supposed
to be the largest key for which the caller wants result rows, not the
key for the first row that could possibly be outside the range that the
caller wants to see.

A subsequent attempt (8ad56) to strengthen the parameter checking added
incorrect clamping of the parameters to the number of rt blocks in the
system (despite the bitmap functions all taking units of rt extents) to
avoid querying ranges past the end of rt bitmap file but failed to fix
the incorrect _rtfind_forw parameter.  The original _rtfind_forw
parameter error then survived the conversion of the startblock and
blockcount fields to rt extents (a0e5c), and the most recent off-by-one
fix (a3a37) thought it was patching a problem when the end of the rt
volume is not in use, but none of these fixes actually solved the
original problem that the author was confused about the "limit" argument
to xfs_rtfind_forw.

Sadly, all four of these patches were written by this author and even
his own usage of this function and rt testing were inadequate to get
this fixed quickly.

Original-problem: fb3c3de2f6 ("xfs: add a couple of queries to iterate free extents in the rtbitmap")
Not-fixed-by: 8ad560d256 ("xfs: strengthen rtalloc query range checks")
Not-fixed-by: a0e5c435ba ("xfs: fix xfs_rtalloc_rec units")
Fixes: a3a374bf18 ("xfs: fix off-by-one error in xfs_rtalloc_query_range")
Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com>
Reviewed-by: Chandan Babu R <chandanrlinux@gmail.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
2020-10-29 09:55:17 +01:00
Darrick J. Wong
56c37c5dba xfs: limit entries returned when counting fsmap records
[ Upstream commit acd1ac3aa22fd58803a12d26b1ab7f70232f8d8d ]

If userspace asked fsmap to count the number of entries, we cannot
return more than UINT_MAX entries because fmh_entries is u32.
Therefore, stop counting if we hit this limit or else we will waste time
to return truncated results.

Fixes: e89c041338 ("xfs: implement the GETFSMAP ioctl")
Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Chandan Babu R <chandanrlinux@gmail.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
2020-10-29 09:55:17 +01:00
Greg Kroah-Hartman
9ce79d9bed This is the 4.19.149 stable release
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Merge 4.19.149 into android-4.19-stable

Changes in 4.19.149
	selinux: allow labeling before policy is loaded
	media: mc-device.c: fix memleak in media_device_register_entity
	dma-fence: Serialise signal enabling (dma_fence_enable_sw_signaling)
	ath10k: fix array out-of-bounds access
	ath10k: fix memory leak for tpc_stats_final
	mm: fix double page fault on arm64 if PTE_AF is cleared
	scsi: aacraid: fix illegal IO beyond last LBA
	m68k: q40: Fix info-leak in rtc_ioctl
	gma/gma500: fix a memory disclosure bug due to uninitialized bytes
	ASoC: kirkwood: fix IRQ error handling
	media: smiapp: Fix error handling at NVM reading
	arch/x86/lib/usercopy_64.c: fix __copy_user_flushcache() cache writeback
	x86/ioapic: Unbreak check_timer()
	ALSA: usb-audio: Add delay quirk for H570e USB headsets
	ALSA: hda/realtek - Couldn't detect Mic if booting with headset plugged
	ALSA: hda/realtek: Enable front panel headset LED on Lenovo ThinkStation P520
	lib/string.c: implement stpcpy
	leds: mlxreg: Fix possible buffer overflow
	PM / devfreq: tegra30: Fix integer overflow on CPU's freq max out
	scsi: fnic: fix use after free
	scsi: lpfc: Fix kernel crash at lpfc_nvme_info_show during remote port bounce
	net: silence data-races on sk_backlog.tail
	clk/ti/adpll: allocate room for terminating null
	drm/amdgpu/powerplay: fix AVFS handling with custom powerplay table
	mtd: cfi_cmdset_0002: don't free cfi->cfiq in error path of cfi_amdstd_setup()
	mfd: mfd-core: Protect against NULL call-back function pointer
	drm/amdgpu/powerplay/smu7: fix AVFS handling with custom powerplay table
	tpm_crb: fix fTPM on AMD Zen+ CPUs
	tracing: Adding NULL checks for trace_array descriptor pointer
	bcache: fix a lost wake-up problem caused by mca_cannibalize_lock
	dmaengine: mediatek: hsdma_probe: fixed a memory leak when devm_request_irq fails
	RDMA/qedr: Fix potential use after free
	RDMA/i40iw: Fix potential use after free
	fix dget_parent() fastpath race
	xfs: fix attr leaf header freemap.size underflow
	RDMA/iw_cgxb4: Fix an error handling path in 'c4iw_connect()'
	ubi: Fix producing anchor PEBs
	mmc: core: Fix size overflow for mmc partitions
	gfs2: clean up iopen glock mess in gfs2_create_inode
	scsi: pm80xx: Cleanup command when a reset times out
	debugfs: Fix !DEBUG_FS debugfs_create_automount
	CIFS: Properly process SMB3 lease breaks
	ASoC: max98090: remove msleep in PLL unlocked workaround
	kernel/sys.c: avoid copying possible padding bytes in copy_to_user
	KVM: arm/arm64: vgic: Fix potential double free dist->spis in __kvm_vgic_destroy()
	xfs: fix log reservation overflows when allocating large rt extents
	neigh_stat_seq_next() should increase position index
	rt_cpu_seq_next should increase position index
	ipv6_route_seq_next should increase position index
	seqlock: Require WRITE_ONCE surrounding raw_seqcount_barrier
	media: ti-vpe: cal: Restrict DMA to avoid memory corruption
	sctp: move trace_sctp_probe_path into sctp_outq_sack
	ACPI: EC: Reference count query handlers under lock
	scsi: ufs: Make ufshcd_add_command_trace() easier to read
	scsi: ufs: Fix a race condition in the tracing code
	dmaengine: zynqmp_dma: fix burst length configuration
	s390/cpum_sf: Use kzalloc and minor changes
	powerpc/eeh: Only dump stack once if an MMIO loop is detected
	Bluetooth: btrtl: Use kvmalloc for FW allocations
	tracing: Set kernel_stack's caller size properly
	ARM: 8948/1: Prevent OOB access in stacktrace
	ar5523: Add USB ID of SMCWUSBT-G2 wireless adapter
	ceph: ensure we have a new cap before continuing in fill_inode
	selftests/ftrace: fix glob selftest
	tools/power/x86/intel_pstate_tracer: changes for python 3 compatibility
	Bluetooth: Fix refcount use-after-free issue
	mm/swapfile.c: swap_next should increase position index
	mm: pagewalk: fix termination condition in walk_pte_range()
	Bluetooth: prefetch channel before killing sock
	KVM: fix overflow of zero page refcount with ksm running
	ALSA: hda: Clear RIRB status before reading WP
	skbuff: fix a data race in skb_queue_len()
	audit: CONFIG_CHANGE don't log internal bookkeeping as an event
	selinux: sel_avc_get_stat_idx should increase position index
	scsi: lpfc: Fix RQ buffer leakage when no IOCBs available
	scsi: lpfc: Fix coverity errors in fmdi attribute handling
	drm/omap: fix possible object reference leak
	clk: stratix10: use do_div() for 64-bit calculation
	crypto: chelsio - This fixes the kernel panic which occurs during a libkcapi test
	mt76: clear skb pointers from rx aggregation reorder buffer during cleanup
	ALSA: usb-audio: Don't create a mixer element with bogus volume range
	perf test: Fix test trace+probe_vfs_getname.sh on s390
	RDMA/rxe: Fix configuration of atomic queue pair attributes
	KVM: x86: fix incorrect comparison in trace event
	dmaengine: stm32-mdma: use vchan_terminate_vdesc() in .terminate_all
	media: staging/imx: Missing assignment in imx_media_capture_device_register()
	x86/pkeys: Add check for pkey "overflow"
	bpf: Remove recursion prevention from rcu free callback
	dmaengine: stm32-dma: use vchan_terminate_vdesc() in .terminate_all
	dmaengine: tegra-apb: Prevent race conditions on channel's freeing
	drm/amd/display: dal_ddc_i2c_payloads_create can fail causing panic
	firmware: arm_sdei: Use cpus_read_lock() to avoid races with cpuhp
	random: fix data races at timer_rand_state
	bus: hisi_lpc: Fixup IO ports addresses to avoid use-after-free in host removal
	media: go7007: Fix URB type for interrupt handling
	Bluetooth: guard against controllers sending zero'd events
	timekeeping: Prevent 32bit truncation in scale64_check_overflow()
	ext4: fix a data race at inode->i_disksize
	perf jevents: Fix leak of mapfile memory
	mm: avoid data corruption on CoW fault into PFN-mapped VMA
	drm/amdgpu: increase atombios cmd timeout
	drm/amd/display: Stop if retimer is not available
	ath10k: use kzalloc to read for ath10k_sdio_hif_diag_read
	scsi: aacraid: Disabling TM path and only processing IOP reset
	Bluetooth: L2CAP: handle l2cap config request during open state
	media: tda10071: fix unsigned sign extension overflow
	xfs: don't ever return a stale pointer from __xfs_dir3_free_read
	xfs: mark dir corrupt when lookup-by-hash fails
	ext4: mark block bitmap corrupted when found instead of BUGON
	tpm: ibmvtpm: Wait for buffer to be set before proceeding
	rtc: sa1100: fix possible race condition
	rtc: ds1374: fix possible race condition
	nfsd: Don't add locks to closed or closing open stateids
	RDMA/cm: Remove a race freeing timewait_info
	KVM: PPC: Book3S HV: Treat TM-related invalid form instructions on P9 like the valid ones
	drm/msm: fix leaks if initialization fails
	drm/msm/a5xx: Always set an OPP supported hardware value
	tracing: Use address-of operator on section symbols
	thermal: rcar_thermal: Handle probe error gracefully
	perf parse-events: Fix 3 use after frees found with clang ASAN
	serial: 8250_port: Don't service RX FIFO if throttled
	serial: 8250_omap: Fix sleeping function called from invalid context during probe
	serial: 8250: 8250_omap: Terminate DMA before pushing data on RX timeout
	perf cpumap: Fix snprintf overflow check
	cpufreq: powernv: Fix frame-size-overflow in powernv_cpufreq_work_fn
	tools: gpio-hammer: Avoid potential overflow in main
	nvme-multipath: do not reset on unknown status
	nvme: Fix controller creation races with teardown flow
	RDMA/rxe: Set sys_image_guid to be aligned with HW IB devices
	scsi: hpsa: correct race condition in offload enabled
	SUNRPC: Fix a potential buffer overflow in 'svc_print_xprts()'
	svcrdma: Fix leak of transport addresses
	PCI: Use ioremap(), not phys_to_virt() for platform ROM
	ubifs: Fix out-of-bounds memory access caused by abnormal value of node_len
	ALSA: usb-audio: Fix case when USB MIDI interface has more than one extra endpoint descriptor
	PCI: pciehp: Fix MSI interrupt race
	NFS: Fix races nfs_page_group_destroy() vs nfs_destroy_unlinked_subrequests()
	mm/kmemleak.c: use address-of operator on section symbols
	mm/filemap.c: clear page error before actual read
	mm/vmscan.c: fix data races using kswapd_classzone_idx
	nvmet-rdma: fix double free of rdma queue
	mm/mmap.c: initialize align_offset explicitly for vm_unmapped_area
	scsi: qedi: Fix termination timeouts in session logout
	serial: uartps: Wait for tx_empty in console setup
	KVM: Remove CREATE_IRQCHIP/SET_PIT2 race
	bdev: Reduce time holding bd_mutex in sync in blkdev_close()
	drivers: char: tlclk.c: Avoid data race between init and interrupt handler
	KVM: arm64: vgic-its: Fix memory leak on the error path of vgic_add_lpi()
	net: openvswitch: use u64 for meter bucket
	scsi: aacraid: Fix error handling paths in aac_probe_one()
	staging:r8188eu: avoid skb_clone for amsdu to msdu conversion
	sparc64: vcc: Fix error return code in vcc_probe()
	arm64: cpufeature: Relax checks for AArch32 support at EL[0-2]
	dt-bindings: sound: wm8994: Correct required supplies based on actual implementaion
	atm: fix a memory leak of vcc->user_back
	perf mem2node: Avoid double free related to realloc
	power: supply: max17040: Correct voltage reading
	phy: samsung: s5pv210-usb2: Add delay after reset
	Bluetooth: Handle Inquiry Cancel error after Inquiry Complete
	USB: EHCI: ehci-mv: fix error handling in mv_ehci_probe()
	tipc: fix memory leak in service subscripting
	tty: serial: samsung: Correct clock selection logic
	ALSA: hda: Fix potential race in unsol event handler
	powerpc/traps: Make unrecoverable NMIs die instead of panic
	fuse: don't check refcount after stealing page
	USB: EHCI: ehci-mv: fix less than zero comparison of an unsigned int
	scsi: cxlflash: Fix error return code in cxlflash_probe()
	arm64/cpufeature: Drop TraceFilt feature exposure from ID_DFR0 register
	e1000: Do not perform reset in reset_task if we are already down
	drm/nouveau/debugfs: fix runtime pm imbalance on error
	drm/nouveau: fix runtime pm imbalance on error
	drm/nouveau/dispnv50: fix runtime pm imbalance on error
	printk: handle blank console arguments passed in.
	usb: dwc3: Increase timeout for CmdAct cleared by device controller
	btrfs: don't force read-only after error in drop snapshot
	vfio/pci: fix memory leaks of eventfd ctx
	perf evsel: Fix 2 memory leaks
	perf trace: Fix the selection for architectures to generate the errno name tables
	perf stat: Fix duration_time value for higher intervals
	perf util: Fix memory leak of prefix_if_not_in
	perf metricgroup: Free metric_events on error
	perf kcore_copy: Fix module map when there are no modules loaded
	ASoC: img-i2s-out: Fix runtime PM imbalance on error
	wlcore: fix runtime pm imbalance in wl1271_tx_work
	wlcore: fix runtime pm imbalance in wlcore_regdomain_config
	mtd: rawnand: omap_elm: Fix runtime PM imbalance on error
	PCI: tegra: Fix runtime PM imbalance on error
	ceph: fix potential race in ceph_check_caps
	mm/swap_state: fix a data race in swapin_nr_pages
	rapidio: avoid data race between file operation callbacks and mport_cdev_add().
	mtd: parser: cmdline: Support MTD names containing one or more colons
	x86/speculation/mds: Mark mds_user_clear_cpu_buffers() __always_inline
	vfio/pci: Clear error and request eventfd ctx after releasing
	cifs: Fix double add page to memcg when cifs_readpages
	nvme: fix possible deadlock when I/O is blocked
	scsi: libfc: Handling of extra kref
	scsi: libfc: Skip additional kref updating work event
	selftests/x86/syscall_nt: Clear weird flags after each test
	vfio/pci: fix racy on error and request eventfd ctx
	btrfs: qgroup: fix data leak caused by race between writeback and truncate
	ubi: fastmap: Free unused fastmap anchor peb during detach
	perf parse-events: Use strcmp() to compare the PMU name
	net: openvswitch: use div_u64() for 64-by-32 divisions
	nvme: explicitly update mpath disk capacity on revalidation
	ASoC: wm8994: Skip setting of the WM8994_MICBIAS register for WM1811
	ASoC: wm8994: Ensure the device is resumed in wm89xx_mic_detect functions
	ASoC: Intel: bytcr_rt5640: Add quirk for MPMAN Converter9 2-in-1
	RISC-V: Take text_mutex in ftrace_init_nop()
	s390/init: add missing __init annotations
	lockdep: fix order in trace_hardirqs_off_caller()
	drm/amdkfd: fix a memory leak issue
	i2c: core: Call i2c_acpi_install_space_handler() before i2c_acpi_register_devices()
	objtool: Fix noreturn detection for ignored functions
	ieee802154: fix one possible memleak in ca8210_dev_com_init
	ieee802154/adf7242: check status of adf7242_read_reg
	clocksource/drivers/h8300_timer8: Fix wrong return value in h8300_8timer_init()
	mwifiex: Increase AES key storage size to 256 bits
	batman-adv: bla: fix type misuse for backbone_gw hash indexing
	atm: eni: fix the missed pci_disable_device() for eni_init_one()
	batman-adv: mcast/TT: fix wrongly dropped or rerouted packets
	mac802154: tx: fix use-after-free
	bpf: Fix clobbering of r2 in bpf_gen_ld_abs
	drm/vc4/vc4_hdmi: fill ASoC card owner
	net: qed: RDMA personality shouldn't fail VF load
	drm/sun4i: sun8i-csc: Secondary CSC register correction
	batman-adv: Add missing include for in_interrupt()
	batman-adv: mcast: fix duplicate mcast packets in BLA backbone from mesh
	batman-adv: mcast: fix duplicate mcast packets from BLA backbone to mesh
	bpf: Fix a rcu warning for bpffs map pretty-print
	ALSA: asihpi: fix iounmap in error handler
	regmap: fix page selection for noinc reads
	MIPS: Add the missing 'CPU_1074K' into __get_cpu_type()
	KVM: x86: Reset MMU context if guest toggles CR4.SMAP or CR4.PKE
	KVM: SVM: Add a dedicated INVD intercept routine
	tracing: fix double free
	s390/dasd: Fix zero write for FBA devices
	kprobes: Fix to check probe enabled before disarm_kprobe_ftrace()
	mm, THP, swap: fix allocating cluster for swapfile by mistake
	s390/zcrypt: Fix ZCRYPT_PERDEV_REQCNT ioctl
	kprobes: Fix compiler warning for !CONFIG_KPROBES_ON_FTRACE
	ata: define AC_ERR_OK
	ata: make qc_prep return ata_completion_errors
	ata: sata_mv, avoid trigerrable BUG_ON
	KVM: arm64: Assume write fault on S1PTW permission fault on instruction fetch
	Linux 4.19.149

Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>
Change-Id: Idfc1b35ec63b4b464aeb6e32709102bee0efc872
2020-10-01 16:49:05 +02:00
Darrick J. Wong
7fff3f7fe9 xfs: mark dir corrupt when lookup-by-hash fails
[ Upstream commit 2e107cf869eecc770e3f630060bb4e5f547d0fd8 ]

In xchk_dir_actor, we attempt to validate the directory hash structures
by performing a directory entry lookup by (hashed) name.  If the lookup
returns ENOENT, that means that the hash information is corrupt.  The
_process_error functions don't catch this, so we have to add that
explicitly.

Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com>
Reviewed-by: Dave Chinner <dchinner@redhat.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
2020-10-01 13:14:37 +02:00
Darrick J. Wong
6ab959f129 xfs: don't ever return a stale pointer from __xfs_dir3_free_read
[ Upstream commit 1cb5deb5bc095c070c09a4540c45f9c9ba24be43 ]

If we decide that a directory free block is corrupt, we must take care
not to leak a buffer pointer to the caller.  After xfs_trans_brelse
returns, the buffer can be freed or reused, which means that we have to
set *bpp back to NULL.

Callers are supposed to notice the nonzero return value and not use the
buffer pointer, but we should code more defensively, even if all current
callers handle this situation correctly.

Fixes: de14c5f541 ("xfs: verify free block header fields")
Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com>
Reviewed-by: Dave Chinner <dchinner@redhat.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
2020-10-01 13:14:37 +02:00
Darrick J. Wong
576f57da91 xfs: fix log reservation overflows when allocating large rt extents
[ Upstream commit b1de6fc7520fe12949c070af0e8c0e4044cd3420 ]

Omar Sandoval reported that a 4G fallocate on the realtime device causes
filesystem shutdowns due to a log reservation overflow that happens when
we log the rtbitmap updates.  Factor rtbitmap/rtsummary updates into the
the tr_write and tr_itruncate log reservation calculation.

"The following reproducer results in a transaction log overrun warning
for me:

    mkfs.xfs -f -r rtdev=/dev/vdc -d rtinherit=1 -m reflink=0 /dev/vdb
    mount -o rtdev=/dev/vdc /dev/vdb /mnt
    fallocate -l 4G /mnt/foo

Reported-by: Omar Sandoval <osandov@osandov.com>
Tested-by: Omar Sandoval <osandov@osandov.com>
Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com>
Reviewed-by: Brian Foster <bfoster@redhat.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
2020-10-01 13:14:29 +02:00
Brian Foster
03ad258887 xfs: fix attr leaf header freemap.size underflow
[ Upstream commit 2a2b5932db67586bacc560cc065d62faece5b996 ]

The leaf format xattr addition helper xfs_attr3_leaf_add_work()
adjusts the block freemap in a couple places. The first update drops
the size of the freemap that the caller had already selected to
place the xattr name/value data. Before the function returns, it
also checks whether the entries array has encroached on a freemap
range by virtue of the new entry addition. This is necessary because
the entries array grows from the start of the block (but end of the
block header) towards the end of the block while the name/value data
grows from the end of the block in the opposite direction. If the
associated freemap is already empty, however, size is zero and the
subtraction underflows the field and causes corruption.

This is reproduced rarely by generic/070. The observed behavior is
that a smaller sized freemap is aligned to the end of the entries
list, several subsequent xattr additions land in larger freemaps and
the entries list expands into the smaller freemap until it is fully
consumed and then underflows. Note that it is not otherwise a
corruption for the entries array to consume an empty freemap because
the nameval list (i.e. the firstused pointer in the xattr header)
starts beyond the end of the corrupted freemap.

Update the freemap size modification to account for the fact that
the freemap entry can be empty and thus stale.

Signed-off-by: Brian Foster <bfoster@redhat.com>
Reviewed-by: Darrick J. Wong <darrick.wong@oracle.com>
Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
2020-10-01 13:14:28 +02:00
Greg Kroah-Hartman
443485d847 This is the 4.19.146 stable release
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Merge 4.19.146 into android-4.19-stable

Changes in 4.19.146
	ARM: dts: logicpd-torpedo-baseboard: Fix broken audio
	ARM: dts: logicpd-som-lv-baseboard: Fix broken audio
	ARM: dts: socfpga: fix register entry for timer3 on Arria10
	ARM: dts: ls1021a: fix QuadSPI-memory reg range
	RDMA/rxe: Fix memleak in rxe_mem_init_user
	RDMA/rxe: Drop pointless checks in rxe_init_ports
	RDMA/bnxt_re: Do not report transparent vlan from QP1
	drm/sun4i: Fix dsi dcs long write function
	scsi: libsas: Set data_dir as DMA_NONE if libata marks qc as NODATA
	RDMA/core: Fix reported speed and width
	mmc: sdhci-msm: Add retries when all tuning phases are found valid
	ARM: dts: bcm: HR2: Fixed QSPI compatible string
	ARM: dts: NSP: Fixed QSPI compatible string
	ARM: dts: BCM5301X: Fixed QSPI compatible string
	arm64: dts: ns2: Fixed QSPI compatible string
	ARC: HSDK: wireup perf irq
	dmaengine: acpi: Put the CSRT table after using it
	netfilter: conntrack: allow sctp hearbeat after connection re-use
	drivers/net/wan/lapbether: Added needed_tailroom
	NFC: st95hf: Fix memleak in st95hf_in_send_cmd
	firestream: Fix memleak in fs_open
	ALSA: hda: Fix 2 channel swapping for Tegra
	drivers/net/wan/lapbether: Set network_header before transmitting
	xfs: initialize the shortform attr header padding entry
	irqchip/eznps: Fix build error for !ARC700 builds
	nvme-fabrics: don't check state NVME_CTRL_NEW for request acceptance
	nvme-rdma: serialize controller teardown sequences
	HID: quirks: Set INCREMENT_USAGE_ON_DUPLICATE for all Saitek X52 devices
	drivers/net/wan/hdlc_cisco: Add hard_header_len
	HID: elan: Fix memleak in elan_input_configured
	ARC: [plat-hsdk]: Switch ethernet phy-mode to rgmii-id
	cpufreq: intel_pstate: Refuse to turn off with HWP enabled
	cpufreq: intel_pstate: Fix intel_pstate_get_hwp_max() for turbo disabled
	ALSA: hda: fix a runtime pm issue in SOF when integrated GPU is disabled
	drm/amdgpu: Fix bug in reporting voltage for CIK
	iommu/amd: Do not use IOMMUv2 functionality when SME is active
	gcov: Disable gcov build with GCC 10
	iio: adc: mcp3422: fix locking scope
	iio: adc: mcp3422: fix locking on error path
	iio: adc: ti-ads1015: fix conversion when CONFIG_PM is not set
	iio:light:ltr501 Fix timestamp alignment issue.
	iio:accel:bmc150-accel: Fix timestamp alignment and prevent data leak.
	iio:adc:ti-adc084s021 Fix alignment and data leak issues.
	iio:adc:ina2xx Fix timestamp alignment issue.
	iio:adc:max1118 Fix alignment of timestamp and data leak issues
	iio:adc:ti-adc081c Fix alignment and data leak issues
	iio:magnetometer:ak8975 Fix alignment and data leak issues.
	iio:light:max44000 Fix timestamp alignment and prevent data leak.
	iio:chemical:ccs811: Fix timestamp alignment and prevent data leak.
	iio: accel: kxsd9: Fix alignment of local buffer.
	iio:accel:mma7455: Fix timestamp alignment and prevent data leak.
	iio:accel:mma8452: Fix timestamp alignment and prevent data leak.
	staging: wlan-ng: fix out of bounds read in prism2sta_probe_usb()
	btrfs: require only sector size alignment for parent eb bytenr
	btrfs: fix lockdep splat in add_missing_dev
	btrfs: fix wrong address when faulting in pages in the search ioctl
	regulator: push allocation in set_consumer_device_supply() out of lock
	scsi: target: iscsi: Fix data digest calculation
	scsi: target: iscsi: Fix hang in iscsit_access_np() when getting tpg->np_login_sem
	drm/tve200: Stabilize enable/disable
	drm/msm: Disable preemption on all 5xx targets
	rbd: require global CAP_SYS_ADMIN for mapping and unmapping
	RDMA/rxe: Fix the parent sysfs read when the interface has 15 chars
	vgacon: remove software scrollback support
	fbcon: remove soft scrollback code
	fbcon: remove now unusued 'softback_lines' cursor() argument
	KVM: VMX: Don't freeze guest when event delivery causes an APIC-access exit
	ARM: dts: vfxxx: Add syscon compatible with OCOTP
	video: fbdev: fix OOB read in vga_8planes_imageblit()
	staging: greybus: audio: fix uninitialized value issue
	phy: qcom-qmp: Use correct values for ipq8074 PCIe Gen2 PHY init
	usb: core: fix slab-out-of-bounds Read in read_descriptors
	USB: serial: ftdi_sio: add IDs for Xsens Mti USB converter
	USB: serial: option: support dynamic Quectel USB compositions
	USB: serial: option: add support for SIM7070/SIM7080/SIM7090 modules
	usb: Fix out of sync data toggle if a configured device is reconfigured
	usb: typec: ucsi: acpi: Check the _DEP dependencies
	gcov: add support for GCC 10.1
	Linux 4.19.146

Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>
Change-Id: Ic9b467bc37c7cbbc1e9704d662bc0c8fda05416e
2020-09-17 13:59:19 +02:00
Darrick J. Wong
b701016288 xfs: initialize the shortform attr header padding entry
[ Upstream commit 125eac243806e021f33a1fdea3687eccbb9f7636 ]

Don't leak kernel memory contents into the shortform attr fork.

Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com>
Reviewed-by: Eric Sandeen <sandeen@redhat.com>
Reviewed-by: Dave Chinner <dchinner@redhat.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Sasha Levin <sashal@kernel.org>
2020-09-17 13:45:25 +02:00
Greg Kroah-Hartman
009b982d9c This is the 4.19.144 stable release
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Merge 4.19.144 into android-4.19-stable

Changes in 4.19.144
	HID: core: Correctly handle ReportSize being zero
	HID: core: Sanitize event code and type when mapping input
	perf record/stat: Explicitly call out event modifiers in the documentation
	scsi: target: tcmu: Fix size in calls to tcmu_flush_dcache_range
	scsi: target: tcmu: Optimize use of flush_dcache_page
	tty: serial: qcom_geni_serial: Drop __init from qcom_geni_console_setup
	drm/msm: add shutdown support for display platform_driver
	hwmon: (applesmc) check status earlier.
	nvmet: Disable keep-alive timer when kato is cleared to 0h
	drm/msm/a6xx: fix gmu start on newer firmware
	ceph: don't allow setlease on cephfs
	cpuidle: Fixup IRQ state
	s390: don't trace preemption in percpu macros
	xen/xenbus: Fix granting of vmalloc'd memory
	dmaengine: of-dma: Fix of_dma_router_xlate's of_dma_xlate handling
	batman-adv: Avoid uninitialized chaddr when handling DHCP
	batman-adv: Fix own OGM check in aggregated OGMs
	batman-adv: bla: use netif_rx_ni when not in interrupt context
	dmaengine: at_hdmac: check return value of of_find_device_by_node() in at_dma_xlate()
	MIPS: mm: BMIPS5000 has inclusive physical caches
	MIPS: BMIPS: Also call bmips_cpu_setup() for secondary cores
	netfilter: nf_tables: add NFTA_SET_USERDATA if not null
	netfilter: nf_tables: incorrect enum nft_list_attributes definition
	netfilter: nf_tables: fix destination register zeroing
	net: hns: Fix memleak in hns_nic_dev_probe
	net: systemport: Fix memleak in bcm_sysport_probe
	ravb: Fixed to be able to unload modules
	net: arc_emac: Fix memleak in arc_mdio_probe
	dmaengine: pl330: Fix burst length if burst size is smaller than bus width
	gtp: add GTPA_LINK info to msg sent to userspace
	bnxt_en: Don't query FW when netif_running() is false.
	bnxt_en: Check for zero dir entries in NVRAM.
	bnxt_en: Fix PCI AER error recovery flow
	bnxt_en: fix HWRM error when querying VF temperature
	xfs: fix boundary test in xfs_attr_shortform_verify
	bnxt: don't enable NAPI until rings are ready
	selftests/bpf: Fix massive output from test_maps
	netfilter: nfnetlink: nfnetlink_unicast() reports EAGAIN instead of ENOBUFS
	nvmet-fc: Fix a missed _irqsave version of spin_lock in 'nvmet_fc_fod_op_done()'
	perf tools: Correct SNOOPX field offset
	net: ethernet: mlx4: Fix memory allocation in mlx4_buddy_init()
	fix regression in "epoll: Keep a reference on files added to the check list"
	net: gemini: Fix another missing clk_disable_unprepare() in probe
	xfs: fix xfs_bmap_validate_extent_raw when checking attr fork of rt files
	perf jevents: Fix suspicious code in fixregex()
	tg3: Fix soft lockup when tg3_reset_task() fails.
	x86, fakenuma: Fix invalid starting node ID
	iommu/vt-d: Serialize IOMMU GCMD register modifications
	thermal: ti-soc-thermal: Fix bogus thermal shutdowns for omap4430
	include/linux/log2.h: add missing () around n in roundup_pow_of_two()
	ext2: don't update mtime on COW faults
	xfs: don't update mtime on COW faults
	btrfs: drop path before adding new uuid tree entry
	vfio/type1: Support faulting PFNMAP vmas
	vfio-pci: Fault mmaps to enable vma tracking
	vfio-pci: Invalidate mmaps and block MMIO access on disabled memory
	btrfs: Remove redundant extent_buffer_get in get_old_root
	btrfs: Remove extraneous extent_buffer_get from tree_mod_log_rewind
	btrfs: set the lockdep class for log tree extent buffers
	uaccess: Add non-pagefault user-space read functions
	uaccess: Add non-pagefault user-space write function
	btrfs: fix potential deadlock in the search ioctl
	net: usb: qmi_wwan: add Telit 0x1050 composition
	usb: qmi_wwan: add D-Link DWM-222 A2 device ID
	ALSA: ca0106: fix error code handling
	ALSA: pcm: oss: Remove superfluous WARN_ON() for mulaw sanity check
	ALSA: hda/hdmi: always check pin power status in i915 pin fixup
	ALSA: firewire-digi00x: exclude Avid Adrenaline from detection
	ALSA: hda - Fix silent audio output and corrupted input on MSI X570-A PRO
	media: rc: do not access device via sysfs after rc_unregister_device()
	media: rc: uevent sysfs file races with rc_unregister_device()
	affs: fix basic permission bits to actually work
	block: allow for_each_bvec to support zero len bvec
	libata: implement ATA_HORKAGE_MAX_TRIM_128M and apply to Sandisks
	dm writecache: handle DAX to partitions on persistent memory correctly
	dm cache metadata: Avoid returning cmd->bm wild pointer on error
	dm thin metadata: Avoid returning cmd->bm wild pointer on error
	mm: slub: fix conversion of freelist_corrupted()
	KVM: arm64: Add kvm_extable for vaxorcism code
	KVM: arm64: Defer guest entry when an asynchronous exception is pending
	KVM: arm64: Survive synchronous exceptions caused by AT instructions
	KVM: arm64: Set HCR_EL2.PTW to prevent AT taking synchronous exception
	vfio/pci: Fix SR-IOV VF handling with MMIO blocking
	checkpatch: fix the usage of capture group ( ... )
	mm/hugetlb: fix a race between hugetlb sysctl handlers
	cfg80211: regulatory: reject invalid hints
	net: usb: Fix uninit-was-stored issue in asix_read_phy_addr()
	Linux 4.19.144

Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>
Change-Id: I81d6b3f044fe0dd919d1ece16d131c2185c00bb3
2020-09-09 19:48:58 +02:00
Mikulas Patocka
884fee7632 xfs: don't update mtime on COW faults
commit b17164e258e3888d376a7434415013175d637377 upstream.

When running in a dax mode, if the user maps a page with MAP_PRIVATE and
PROT_WRITE, the xfs filesystem would incorrectly update ctime and mtime
when the user hits a COW fault.

This breaks building of the Linux kernel.  How to reproduce:

 1. extract the Linux kernel tree on dax-mounted xfs filesystem
 2. run make clean
 3. run make -j12
 4. run make -j12

at step 4, make would incorrectly rebuild the whole kernel (although it
was already built in step 3).

The reason for the breakage is that almost all object files depend on
objtool.  When we run objtool, it takes COW page fault on its .data
section, and these faults will incorrectly update the timestamp of the
objtool binary.  The updated timestamp causes make to rebuild the whole
tree.

Signed-off-by: Mikulas Patocka <mpatocka@redhat.com>
Cc: stable@vger.kernel.org
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2020-09-09 19:04:28 +02:00
Darrick J. Wong
ab2413892e xfs: fix xfs_bmap_validate_extent_raw when checking attr fork of rt files
[ Upstream commit d0c20d38af135b2b4b90aa59df7878ef0c8fbef4 ]

The realtime flag only applies to the data fork, so don't use the
realtime block number checks on the attr fork of a realtime file.

Fixes: 30b0984d91 ("xfs: refactor bmap record validation")
Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com>
Reviewed-by: Eric Sandeen <sandeen@redhat.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
2020-09-09 19:04:27 +02:00
Eric Sandeen
017265f142 xfs: fix boundary test in xfs_attr_shortform_verify
[ Upstream commit f4020438fab05364018c91f7e02ebdd192085933 ]

The boundary test for the fixed-offset parts of xfs_attr_sf_entry in
xfs_attr_shortform_verify is off by one, because the variable array
at the end is defined as nameval[1] not nameval[].
Hence we need to subtract 1 from the calculation.

This can be shown by:

# touch file
# setfattr -n root.a file

and verifications will fail when it's written to disk.

This only matters for a last attribute which has a single-byte name
and no value, otherwise the combination of namelen & valuelen will
push endp further out and this test won't fail.

Fixes: 1e1bbd8e7e ("xfs: create structure verifier function for shortform xattrs")
Signed-off-by: Eric Sandeen <sandeen@redhat.com>
Reviewed-by: Darrick J. Wong <darrick.wong@oracle.com>
Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Sasha Levin <sashal@kernel.org>
2020-09-09 19:04:26 +02:00
Greg Kroah-Hartman
a13ec5ea86 This is the 4.19.143 stable release
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Merge 4.19.143 into android-4.19-stable

Changes in 4.19.143
	powerpc/64s: Don't init FSCR_DSCR in __init_FSCR()
	gre6: Fix reception with IP6_TNL_F_RCV_DSCP_COPY
	net: Fix potential wrong skb->protocol in skb_vlan_untag()
	net: qrtr: fix usage of idr in port assignment to socket
	net/smc: Prevent kernel-infoleak in __smc_diag_dump()
	tipc: fix uninit skb->data in tipc_nl_compat_dumpit()
	net: ena: Make missed_tx stat incremental
	ipvlan: fix device features
	ALSA: pci: delete repeated words in comments
	ASoC: img: Fix a reference count leak in img_i2s_in_set_fmt
	ASoC: img-parallel-out: Fix a reference count leak
	ASoC: tegra: Fix reference count leaks.
	mfd: intel-lpss: Add Intel Emmitsburg PCH PCI IDs
	arm64: dts: qcom: msm8916: Pull down PDM GPIOs during sleep
	powerpc/xive: Ignore kmemleak false positives
	media: pci: ttpci: av7110: fix possible buffer overflow caused by bad DMA value in debiirq()
	blktrace: ensure our debugfs dir exists
	scsi: target: tcmu: Fix crash on ARM during cmd completion
	iommu/iova: Don't BUG on invalid PFNs
	drm/amdkfd: Fix reference count leaks.
	drm/radeon: fix multiple reference count leak
	drm/amdgpu: fix ref count leak in amdgpu_driver_open_kms
	drm/amd/display: fix ref count leak in amdgpu_drm_ioctl
	drm/amdgpu: fix ref count leak in amdgpu_display_crtc_set_config
	drm/amdgpu/display: fix ref count leak when pm_runtime_get_sync fails
	scsi: lpfc: Fix shost refcount mismatch when deleting vport
	xfs: Don't allow logging of XFS_ISTALE inodes
	selftests/powerpc: Purge extra count_pmc() calls of ebb selftests
	f2fs: fix error path in do_recover_data()
	omapfb: fix multiple reference count leaks due to pm_runtime_get_sync
	PCI: Fix pci_create_slot() reference count leak
	ARM: dts: ls1021a: output PPS signal on FIPER2
	rtlwifi: rtl8192cu: Prevent leaking urb
	mips/vdso: Fix resource leaks in genvdso.c
	cec-api: prevent leaking memory through hole in structure
	HID: quirks: add NOGET quirk for Logitech GROUP
	f2fs: fix use-after-free issue
	drm/nouveau/drm/noveau: fix reference count leak in nouveau_fbcon_open
	drm/nouveau: fix reference count leak in nv50_disp_atomic_commit
	drm/nouveau: Fix reference count leak in nouveau_connector_detect
	locking/lockdep: Fix overflow in presentation of average lock-time
	btrfs: file: reserve qgroup space after the hole punch range is locked
	scsi: iscsi: Do not put host in iscsi_set_flashnode_param()
	ceph: fix potential mdsc use-after-free crash
	scsi: fcoe: Memory leak fix in fcoe_sysfs_fcf_del()
	EDAC/ie31200: Fallback if host bridge device is already initialized
	KVM: arm64: Fix symbol dependency in __hyp_call_panic_nvhe
	powerpc/spufs: add CONFIG_COREDUMP dependency
	USB: sisusbvga: Fix a potential UB casued by left shifting a negative value
	efi: provide empty efi_enter_virtual_mode implementation
	Revert "ath10k: fix DMA related firmware crashes on multiple devices"
	media: gpio-ir-tx: improve precision of transmitted signal due to scheduling
	drm/msm/adreno: fix updating ring fence
	nvme-fc: Fix wrong return value in __nvme_fc_init_request()
	null_blk: fix passing of REQ_FUA flag in null_handle_rq
	i2c: rcar: in slave mode, clear NACK earlier
	usb: gadget: f_tcm: Fix some resource leaks in some error paths
	jbd2: make sure jh have b_transaction set in refile/unfile_buffer
	ext4: don't BUG on inconsistent journal feature
	ext4: handle read only external journal device
	jbd2: abort journal if free a async write error metadata buffer
	ext4: handle option set by mount flags correctly
	ext4: handle error of ext4_setup_system_zone() on remount
	ext4: correctly restore system zone info when remount fails
	fs: prevent BUG_ON in submit_bh_wbc()
	spi: stm32: fix stm32_spi_prepare_mbr in case of odd clk_rate
	s390/cio: add cond_resched() in the slow_eval_known_fn() loop
	ASoC: wm8994: Avoid attempts to read unreadable registers
	scsi: fcoe: Fix I/O path allocation
	scsi: ufs: Fix possible infinite loop in ufshcd_hold
	scsi: ufs: Improve interrupt handling for shared interrupts
	scsi: ufs: Clean up completed request without interrupt notification
	scsi: qla2xxx: Check if FW supports MQ before enabling
	scsi: qla2xxx: Fix null pointer access during disconnect from subsystem
	Revert "scsi: qla2xxx: Fix crash on qla2x00_mailbox_command"
	macvlan: validate setting of multiple remote source MAC addresses
	net: gianfar: Add of_node_put() before goto statement
	powerpc/perf: Fix soft lockups due to missed interrupt accounting
	block: loop: set discard granularity and alignment for block device backed loop
	HID: i2c-hid: Always sleep 60ms after I2C_HID_PWR_ON commands
	blk-mq: order adding requests to hctx->dispatch and checking SCHED_RESTART
	btrfs: reset compression level for lzo on remount
	btrfs: fix space cache memory leak after transaction abort
	fbcon: prevent user font height or width change from causing potential out-of-bounds access
	USB: lvtest: return proper error code in probe
	vt: defer kfree() of vc_screenbuf in vc_do_resize()
	vt_ioctl: change VT_RESIZEX ioctl to check for error return from vc_resize()
	serial: samsung: Removes the IRQ not found warning
	serial: pl011: Fix oops on -EPROBE_DEFER
	serial: pl011: Don't leak amba_ports entry on driver register error
	serial: 8250_exar: Fix number of ports for Commtech PCIe cards
	serial: 8250: change lock order in serial8250_do_startup()
	writeback: Protect inode->i_io_list with inode->i_lock
	writeback: Avoid skipping inode writeback
	writeback: Fix sync livelock due to b_dirty_time processing
	XEN uses irqdesc::irq_data_common::handler_data to store a per interrupt XEN data pointer which contains XEN specific information.
	usb: host: xhci: fix ep context print mismatch in debugfs
	xhci: Do warm-reset when both CAS and XDEV_RESUME are set
	xhci: Always restore EP_SOFT_CLEAR_TOGGLE even if ep reset failed
	PM: sleep: core: Fix the handling of pending runtime resume requests
	device property: Fix the secondary firmware node handling in set_primary_fwnode()
	genirq/matrix: Deal with the sillyness of for_each_cpu() on UP
	irqchip/stm32-exti: Avoid losing interrupts due to clearing pending bits by mistake
	drm/amdgpu: Fix buffer overflow in INFO ioctl
	drm/amd/pm: correct Vega10 swctf limit setting
	drm/amd/pm: correct Vega12 swctf limit setting
	USB: yurex: Fix bad gfp argument
	usb: uas: Add quirk for PNY Pro Elite
	USB: quirks: Add no-lpm quirk for another Raydium touchscreen
	USB: quirks: Ignore duplicate endpoint on Sound Devices MixPre-D
	USB: Ignore UAS for JMicron JMS567 ATA/ATAPI Bridge
	usb: host: ohci-exynos: Fix error handling in exynos_ohci_probe()
	USB: gadget: u_f: add overflow checks to VLA macros
	USB: gadget: f_ncm: add bounds checks to ncm_unwrap_ntb()
	USB: gadget: u_f: Unbreak offset calculation in VLAs
	USB: cdc-acm: rework notification_buffer resizing
	usb: storage: Add unusual_uas entry for Sony PSZ drives
	btrfs: check the right error variable in btrfs_del_dir_entries_in_log
	usb: dwc3: gadget: Don't setup more than requested
	usb: dwc3: gadget: Fix handling ZLP
	usb: dwc3: gadget: Handle ZLP for sg requests
	tpm: Unify the mismatching TPM space buffer sizes
	HID: hiddev: Fix slab-out-of-bounds write in hiddev_ioctl_usage()
	ALSA: usb-audio: Update documentation comment for MS2109 quirk
	Linux 4.19.143

Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>
Change-Id: I8b6e29eda77bd69df30132842cf28019c8e7c1a3
2020-09-03 13:19:20 +02:00
Dave Chinner
6af2bb1451 xfs: Don't allow logging of XFS_ISTALE inodes
[ Upstream commit 96355d5a1f0ee6dcc182c37db4894ec0c29f1692 ]

In tracking down a problem in this patchset, I discovered we are
reclaiming dirty stale inodes. This wasn't discovered until inodes
were always attached to the cluster buffer and then the rcu callback
that freed inodes was assert failing because the inode still had an
active pointer to the cluster buffer after it had been reclaimed.

Debugging the issue indicated that this was a pre-existing issue
resulting from the way the inodes are handled in xfs_inactive_ifree.
When we free a cluster buffer from xfs_ifree_cluster, all the inodes
in cache are marked XFS_ISTALE. Those that are clean have nothing
else done to them and so eventually get cleaned up by background
reclaim. i.e. it is assumed we'll never dirty/relog an inode marked
XFS_ISTALE.

On journal commit dirty stale inodes as are handled by both
buffer and inode log items to run though xfs_istale_done() and
removed from the AIL (buffer log item commit) or the log item will
simply unpin it because the buffer log item will clean it. What happens
to any specific inode is entirely dependent on which log item wins
the commit race, but the result is the same - stale inodes are
clean, not attached to the cluster buffer, and not in the AIL. Hence
inode reclaim can just free these inodes without further care.

However, if the stale inode is relogged, it gets dirtied again and
relogged into the CIL. Most of the time this isn't an issue, because
relogging simply changes the inode's location in the current
checkpoint. Problems arise, however, when the CIL checkpoints
between two transactions in the xfs_inactive_ifree() deferops
processing. This results in the XFS_ISTALE inode being redirtied
and inserted into the CIL without any of the other stale cluster
buffer infrastructure being in place.

Hence on journal commit, it simply gets unpinned, so it remains
dirty in memory. Everything in inode writeback avoids XFS_ISTALE
inodes so it can't be written back, and it is not tracked in the AIL
so there's not even a trigger to attempt to clean the inode. Hence
the inode just sits dirty in memory until inode reclaim comes along,
sees that it is XFS_ISTALE, and goes to reclaim it. This reclaiming
of a dirty inode caused use after free, list corruptions and other
nasty issues later in this patchset.

Hence this patch addresses a violation of the "never log XFS_ISTALE
inodes" caused by the deferops processing rolling a transaction
and relogging a stale inode in xfs_inactive_free. It also adds a
bunch of asserts to catch this problem in debug kernels so that
we don't reintroduce this problem in future.

Reproducer for this issue was generic/558 on a v4 filesystem.

Signed-off-by: Dave Chinner <dchinner@redhat.com>
Reviewed-by: Brian Foster <bfoster@redhat.com>
Reviewed-by: Darrick J. Wong <darrick.wong@oracle.com>
Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
2020-09-03 11:24:20 +02:00
Greg Kroah-Hartman
599bf02de4 This is the 4.19.142 stable release
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Merge 4.19.142 into android-4.19-stable

Changes in 4.19.142
	drm/vgem: Replace opencoded version of drm_gem_dumb_map_offset()
	perf probe: Fix memory leakage when the probe point is not found
	khugepaged: khugepaged_test_exit() check mmget_still_valid()
	khugepaged: adjust VM_BUG_ON_MM() in __khugepaged_enter()
	btrfs: export helpers for subvolume name/id resolution
	btrfs: don't show full path of bind mounts in subvol=
	btrfs: Move free_pages_out label in inline extent handling branch in compress_file_range
	btrfs: inode: fix NULL pointer dereference if inode doesn't need compression
	btrfs: sysfs: use NOFS for device creation
	romfs: fix uninitialized memory leak in romfs_dev_read()
	kernel/relay.c: fix memleak on destroy relay channel
	mm: include CMA pages in lowmem_reserve at boot
	mm, page_alloc: fix core hung in free_pcppages_bulk()
	ext4: fix checking of directory entry validity for inline directories
	jbd2: add the missing unlock_buffer() in the error path of jbd2_write_superblock()
	scsi: zfcp: Fix use-after-free in request timeout handlers
	drm/amd/display: fix pow() crashing when given base 0
	kthread: Do not preempt current task if it is going to call schedule()
	spi: Prevent adding devices below an unregistering controller
	scsi: ufs: Add DELAY_BEFORE_LPM quirk for Micron devices
	scsi: target: tcmu: Fix crash in tcmu_flush_dcache_range on ARM
	media: budget-core: Improve exception handling in budget_register()
	rtc: goldfish: Enable interrupt in set_alarm() when necessary
	media: vpss: clean up resources in init
	Input: psmouse - add a newline when printing 'proto' by sysfs
	m68knommu: fix overwriting of bits in ColdFire V3 cache control
	svcrdma: Fix another Receive buffer leak
	xfs: fix inode quota reservation checks
	jffs2: fix UAF problem
	ceph: fix use-after-free for fsc->mdsc
	cpufreq: intel_pstate: Fix cpuinfo_max_freq when MSR_TURBO_RATIO_LIMIT is 0
	scsi: libfc: Free skb in fc_disc_gpn_id_resp() for valid cases
	virtio_ring: Avoid loop when vq is broken in virtqueue_poll
	tools/testing/selftests/cgroup/cgroup_util.c: cg_read_strcmp: fix null pointer dereference
	xfs: Fix UBSAN null-ptr-deref in xfs_sysfs_init
	alpha: fix annotation of io{read,write}{16,32}be()
	fs/signalfd.c: fix inconsistent return codes for signalfd4
	ext4: fix potential negative array index in do_split()
	ext4: don't allow overlapping system zones
	ASoC: q6routing: add dummy register read/write function
	i40e: Set RX_ONLY mode for unicast promiscuous on VLAN
	i40e: Fix crash during removing i40e driver
	net: fec: correct the error path for regulator disable in probe
	bonding: show saner speed for broadcast mode
	bonding: fix a potential double-unregister
	s390/runtime_instrumentation: fix storage key handling
	s390/ptrace: fix storage key handling
	ASoC: msm8916-wcd-analog: fix register Interrupt offset
	ASoC: intel: Fix memleak in sst_media_open
	vfio/type1: Add proper error unwind for vfio_iommu_replay()
	kvm: x86: Toggling CR4.SMAP does not load PDPTEs in PAE mode
	kvm: x86: Toggling CR4.PKE does not load PDPTEs in PAE mode
	kconfig: qconf: do not limit the pop-up menu to the first row
	kconfig: qconf: fix signal connection to invalid slots
	efi: avoid error message when booting under Xen
	Fix build error when CONFIG_ACPI is not set/enabled:
	RDMA/bnxt_re: Do not add user qps to flushlist
	afs: Fix NULL deref in afs_dynroot_depopulate()
	bonding: fix active-backup failover for current ARP slave
	net: ena: Prevent reset after device destruction
	net: gemini: Fix missing free_netdev() in error path of gemini_ethernet_port_probe()
	hv_netvsc: Fix the queue_mapping in netvsc_vf_xmit()
	net: dsa: b53: check for timeout
	powerpc/pseries: Do not initiate shutdown when system is running on UPS
	efi: add missed destroy_workqueue when efisubsys_init fails
	epoll: Keep a reference on files added to the check list
	do_epoll_ctl(): clean the failure exits up a bit
	mm/hugetlb: fix calculation of adjust_range_if_pmd_sharing_possible
	xen: don't reschedule in preemption off sections
	clk: Evict unregistered clks from parent caches
	KVM: Pass MMU notifier range flags to kvm_unmap_hva_range()
	KVM: arm64: Only reschedule if MMU_NOTIFIER_RANGE_BLOCKABLE is not set
	Linux 4.19.142

Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>
Change-Id: Ibfe4a0a4249f76ab35076f4b003e32cd6f9788a5
2020-08-26 11:07:03 +02:00
Eiichi Tsukata
c90652abae xfs: Fix UBSAN null-ptr-deref in xfs_sysfs_init
[ Upstream commit 96cf2a2c75567ff56195fe3126d497a2e7e4379f ]

If xfs_sysfs_init is called with parent_kobj == NULL, UBSAN
shows the following warning:

  UBSAN: null-ptr-deref in ./fs/xfs/xfs_sysfs.h:37:23
  member access within null pointer of type 'struct xfs_kobj'
  Call Trace:
   dump_stack+0x10e/0x195
   ubsan_type_mismatch_common+0x241/0x280
   __ubsan_handle_type_mismatch_v1+0x32/0x40
   init_xfs_fs+0x12b/0x28f
   do_one_initcall+0xdd/0x1d0
   do_initcall_level+0x151/0x1b6
   do_initcalls+0x50/0x8f
   do_basic_setup+0x29/0x2b
   kernel_init_freeable+0x19f/0x20b
   kernel_init+0x11/0x1e0
   ret_from_fork+0x22/0x30

Fix it by checking parent_kobj before the code accesses its member.

Signed-off-by: Eiichi Tsukata <devel@etsukata.com>
Reviewed-by: Darrick J. Wong <darrick.wong@oracle.com>
[darrick: minor whitespace edits]
Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
2020-08-26 10:31:02 +02:00
Darrick J. Wong
1bc31e520f xfs: fix inode quota reservation checks
[ Upstream commit f959b5d037e71a4d69b5bf71faffa065d9269b4a ]

xfs_trans_dqresv is the function that we use to make reservations
against resource quotas.  Each resource contains two counters: the
q_core counter, which tracks resources allocated on disk; and the dquot
reservation counter, which tracks how much of that resource has either
been allocated or reserved by threads that are working on metadata
updates.

For disk blocks, we compare the proposed reservation counter against the
hard and soft limits to decide if we're going to fail the operation.
However, for inodes we inexplicably compare against the q_core counter,
not the incore reservation count.

Since the q_core counter is always lower than the reservation count and
we unlock the dquot between reservation and transaction commit, this
means that multiple threads can reserve the last inode count before we
hit the hard limit, and when they commit, we'll be well over the hard
limit.

Fix this by checking against the incore inode reservation counter, since
we would appear to maintain that correctly (and that's what we report in
GETQUOTA).

Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com>
Reviewed-by: Allison Collins <allison.henderson@oracle.com>
Reviewed-by: Chandan Babu R <chandanrlinux@gmail.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Sasha Levin <sashal@kernel.org>
2020-08-26 10:31:01 +02:00
Greg Kroah-Hartman
7086849b9c This is the 4.19.140 stable release
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Merge 4.19.140 into android-4.19-stable

Changes in 4.19.140
	tracepoint: Mark __tracepoint_string's __used
	HID: input: Fix devices that return multiple bytes in battery report
	cgroup: add missing skcd->no_refcnt check in cgroup_sk_clone()
	x86/mce/inject: Fix a wrong assignment of i_mce.status
	sched/fair: Fix NOHZ next idle balance
	sched: correct SD_flags returned by tl->sd_flags()
	arm64: dts: rockchip: fix rk3368-lion gmac reset gpio
	arm64: dts: rockchip: fix rk3399-puma vcc5v0-host gpio
	arm64: dts: rockchip: fix rk3399-puma gmac reset gpio
	EDAC: Fix reference count leaks
	arm64: dts: qcom: msm8916: Replace invalid bias-pull-none property
	crypto: ccree - fix resource leak on error path
	firmware: arm_scmi: Fix SCMI genpd domain probing
	arm64: dts: exynos: Fix silent hang after boot on Espresso
	clk: scmi: Fix min and max rate when registering clocks with discrete rates
	m68k: mac: Don't send IOP message until channel is idle
	m68k: mac: Fix IOP status/control register writes
	platform/x86: intel-hid: Fix return value check in check_acpi_dev()
	platform/x86: intel-vbtn: Fix return value check in check_acpi_dev()
	ARM: dts: gose: Fix ports node name for adv7180
	ARM: dts: gose: Fix ports node name for adv7612
	ARM: at91: pm: add missing put_device() call in at91_pm_sram_init()
	spi: lantiq: fix: Rx overflow error in full duplex mode
	ARM: socfpga: PM: add missing put_device() call in socfpga_setup_ocram_self_refresh()
	drm/tilcdc: fix leak & null ref in panel_connector_get_modes
	soc: qcom: rpmh-rsc: Set suppress_bind_attrs flag
	Bluetooth: add a mutex lock to avoid UAF in do_enale_set
	loop: be paranoid on exit and prevent new additions / removals
	fs/btrfs: Add cond_resched() for try_release_extent_mapping() stalls
	drm/amdgpu: avoid dereferencing a NULL pointer
	drm/radeon: Fix reference count leaks caused by pm_runtime_get_sync
	crypto: aesni - Fix build with LLVM_IAS=1
	video: fbdev: neofb: fix memory leak in neo_scan_monitor()
	md-cluster: fix wild pointer of unlock_all_bitmaps()
	arm64: dts: hisilicon: hikey: fixes to comply with adi, adv7533 DT binding
	drm/etnaviv: fix ref count leak via pm_runtime_get_sync
	drm/nouveau: fix multiple instances of reference count leaks
	usb: mtu3: clear dual mode of u3port when disable device
	drm/debugfs: fix plain echo to connector "force" attribute
	drm/radeon: disable AGP by default
	irqchip/irq-mtk-sysirq: Replace spinlock with raw_spinlock
	mm/mmap.c: Add cond_resched() for exit_mmap() CPU stalls
	brcmfmac: keep SDIO watchdog running when console_interval is non-zero
	brcmfmac: To fix Bss Info flag definition Bug
	brcmfmac: set state of hanger slot to FREE when flushing PSQ
	iwlegacy: Check the return value of pcie_capability_read_*()
	gpu: host1x: debug: Fix multiple channels emitting messages simultaneously
	usb: gadget: net2280: fix memory leak on probe error handling paths
	bdc: Fix bug causing crash after multiple disconnects
	usb: bdc: Halt controller on suspend
	dyndbg: fix a BUG_ON in ddebug_describe_flags
	bcache: fix super block seq numbers comparision in register_cache_set()
	ACPICA: Do not increment operation_region reference counts for field units
	drm/msm: ratelimit crtc event overflow error
	agp/intel: Fix a memory leak on module initialisation failure
	video: fbdev: sm712fb: fix an issue about iounmap for a wrong address
	console: newport_con: fix an issue about leak related system resources
	video: pxafb: Fix the function used to balance a 'dma_alloc_coherent()' call
	ath10k: Acquire tx_lock in tx error paths
	iio: improve IIO_CONCENTRATION channel type description
	drm/etnaviv: Fix error path on failure to enable bus clk
	drm/arm: fix unintentional integer overflow on left shift
	leds: lm355x: avoid enum conversion warning
	media: omap3isp: Add missed v4l2_ctrl_handler_free() for preview_init_entities()
	ASoC: Intel: bxt_rt298: add missing .owner field
	scsi: cumana_2: Fix different dev_id between request_irq() and free_irq()
	drm/mipi: use dcs write for mipi_dsi_dcs_set_tear_scanline
	cxl: Fix kobject memleak
	drm/radeon: fix array out-of-bounds read and write issues
	scsi: powertec: Fix different dev_id between request_irq() and free_irq()
	scsi: eesox: Fix different dev_id between request_irq() and free_irq()
	ipvs: allow connection reuse for unconfirmed conntrack
	media: firewire: Using uninitialized values in node_probe()
	media: exynos4-is: Add missed check for pinctrl_lookup_state()
	xfs: don't eat an EIO/ENOSPC writeback error when scrubbing data fork
	xfs: fix reflink quota reservation accounting error
	RDMA/rxe: Skip dgid check in loopback mode
	PCI: Fix pci_cfg_wait queue locking problem
	leds: core: Flush scheduled work for system suspend
	drm: panel: simple: Fix bpc for LG LB070WV8 panel
	phy: exynos5-usbdrd: Calibrating makes sense only for USB2.0 PHY
	drm/bridge: sil_sii8620: initialize return of sii8620_readb
	scsi: scsi_debug: Add check for sdebug_max_queue during module init
	mwifiex: Prevent memory corruption handling keys
	powerpc/vdso: Fix vdso cpu truncation
	RDMA/qedr: SRQ's bug fixes
	RDMA/rxe: Prevent access to wr->next ptr afrer wr is posted to send queue
	staging: rtl8192u: fix a dubious looking mask before a shift
	PCI/ASPM: Add missing newline in sysfs 'policy'
	powerpc/book3s64/pkeys: Use PVR check instead of cpu feature
	drm/imx: tve: fix regulator_disable error path
	USB: serial: iuu_phoenix: fix led-activity helpers
	usb: core: fix quirks_param_set() writing to a const pointer
	thermal: ti-soc-thermal: Fix reversed condition in ti_thermal_expose_sensor()
	coresight: tmc: Fix TMC mode read in tmc_read_unprepare_etb()
	MIPS: OCTEON: add missing put_device() call in dwc3_octeon_device_init()
	usb: dwc2: Fix error path in gadget registration
	scsi: mesh: Fix panic after host or bus reset
	net: dsa: mv88e6xxx: MV88E6097 does not support jumbo configuration
	PCI: cadence: Fix updating Vendor ID and Subsystem Vendor ID register
	RDMA/core: Fix return error value in _ib_modify_qp() to negative
	Smack: fix another vsscanf out of bounds
	Smack: prevent underflow in smk_set_cipso()
	power: supply: check if calc_soc succeeded in pm860x_init_battery
	Bluetooth: hci_h5: Set HCI_UART_RESET_ON_INIT to correct flags
	Bluetooth: hci_serdev: Only unregister device if it was registered
	net: dsa: rtl8366: Fix VLAN semantics
	net: dsa: rtl8366: Fix VLAN set-up
	powerpc/boot: Fix CONFIG_PPC_MPC52XX references
	selftests/powerpc: Fix CPU affinity for child process
	PCI: Release IVRS table in AMD ACS quirk
	selftests/powerpc: Fix online CPU selection
	ASoC: meson: axg-tdm-interface: fix link fmt setup
	s390/qeth: don't process empty bridge port events
	wl1251: fix always return 0 error
	tools, build: Propagate build failures from tools/build/Makefile.build
	net: ethernet: aquantia: Fix wrong return value
	liquidio: Fix wrong return value in cn23xx_get_pf_num()
	net: spider_net: Fix the size used in a 'dma_free_coherent()' call
	fsl/fman: use 32-bit unsigned integer
	fsl/fman: fix dereference null return value
	fsl/fman: fix unreachable code
	fsl/fman: check dereferencing null pointer
	fsl/fman: fix eth hash table allocation
	dlm: Fix kobject memleak
	ocfs2: fix unbalanced locking
	pinctrl-single: fix pcs_parse_pinconf() return value
	svcrdma: Fix page leak in svc_rdma_recv_read_chunk()
	x86/fsgsbase/64: Fix NULL deref in 86_fsgsbase_read_task
	crypto: aesni - add compatibility with IAS
	af_packet: TPACKET_V3: fix fill status rwlock imbalance
	drivers/net/wan/lapbether: Added needed_headroom and a skb->len check
	net/nfc/rawsock.c: add CAP_NET_RAW check.
	net: Set fput_needed iff FDPUT_FPUT is set
	net/tls: Fix kmap usage
	net: refactor bind_bucket fastreuse into helper
	net: initialize fastreuse on inet_inherit_port
	USB: serial: cp210x: re-enable auto-RTS on open
	USB: serial: cp210x: enable usb generic throttle/unthrottle
	ALSA: hda - fix the micmute led status for Lenovo ThinkCentre AIO
	ALSA: usb-audio: Creative USB X-Fi Pro SB1095 volume knob support
	ALSA: usb-audio: fix overeager device match for MacroSilicon MS2109
	ALSA: usb-audio: work around streaming quirk for MacroSilicon MS2109
	pstore: Fix linking when crypto API disabled
	crypto: hisilicon - don't sleep of CRYPTO_TFM_REQ_MAY_SLEEP was not specified
	crypto: qat - fix double free in qat_uclo_create_batch_init_list
	crypto: ccp - Fix use of merged scatterlists
	crypto: cpt - don't sleep of CRYPTO_TFM_REQ_MAY_SLEEP was not specified
	bitfield.h: don't compile-time validate _val in FIELD_FIT
	fs/minix: check return value of sb_getblk()
	fs/minix: don't allow getting deleted inodes
	fs/minix: reject too-large maximum file size
	ALSA: usb-audio: add quirk for Pioneer DDJ-RB
	9p: Fix memory leak in v9fs_mount
	drm/ttm/nouveau: don't call tt destroy callback on alloc failure.
	NFS: Don't move layouts to plh_return_segs list while in use
	NFS: Don't return layout segments that are in use
	cpufreq: dt: fix oops on armada37xx
	include/asm-generic/vmlinux.lds.h: align ro_after_init
	spi: spidev: Align buffers for DMA
	mtd: rawnand: qcom: avoid write to unavailable register
	parisc: Implement __smp_store_release and __smp_load_acquire barriers
	parisc: mask out enable and reserved bits from sba imask
	ARM: 8992/1: Fix unwind_frame for clang-built kernels
	irqdomain/treewide: Free firmware node after domain removal
	xen/balloon: fix accounting in alloc_xenballooned_pages error path
	xen/balloon: make the balloon wait interruptible
	xen/gntdev: Fix dmabuf import with non-zero sgt offset
	Linux 4.19.140

Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>
Change-Id: I6b0d8dcf9ded022f62d9c62605388f1c1e9112d1
2020-08-19 08:43:22 +02:00
Darrick J. Wong
4c2c947f48 xfs: fix reflink quota reservation accounting error
[ Upstream commit 83895227aba1ade33e81f586aa7b6b1e143096a5 ]

Quota reservations are supposed to account for the blocks that might be
allocated due to a bmap btree split.  Reflink doesn't do this, so fix
this to make the quota accounting more accurate before we start
rearranging things.

Fixes: 862bb360ef ("xfs: reflink extents from one file to another")
Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com>
Reviewed-by: Brian Foster <bfoster@redhat.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
2020-08-19 08:14:56 +02:00
Darrick J. Wong
17979d8c8b xfs: don't eat an EIO/ENOSPC writeback error when scrubbing data fork
[ Upstream commit eb0efe5063bb10bcb653e4f8e92a74719c03a347 ]

The data fork scrubber calls filemap_write_and_wait to flush dirty pages
and delalloc reservations out to disk prior to checking the data fork's
extent mappings.  Unfortunately, this means that scrub can consume the
EIO/ENOSPC errors that would otherwise have stayed around in the address
space until (we hope) the writer application calls fsync to persist data
and collect errors.  The end result is that programs that wrote to a
file might never see the error code and proceed as if nothing were
wrong.

xfs_scrub is not in a position to notify file writers about the
writeback failure, and it's only here to check metadata, not file
contents.  Therefore, if writeback fails, we should stuff the error code
back into the address space so that an fsync by the writer application
can pick that up.

Fixes: 99d9d8d05d ("xfs: scrub inode block mappings")
Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com>
Reviewed-by: Brian Foster <bfoster@redhat.com>
Reviewed-by: Dave Chinner <dchinner@redhat.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
2020-08-19 08:14:56 +02:00
Greg Kroah-Hartman
a5218b3636 This is the 4.19.137 stable release
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Merge 4.19.137 into android-4.19-stable

Changes in 4.19.137
	crypto: ccp - Release all allocated memory if sha type is invalid
	media: rc: prevent memory leak in cx23888_ir_probe
	iio: imu: adis16400: fix memory leak
	drm/amdgpu: fix multiple memory leaks in acp_hw_init
	tracing: Have error path in predicate_parse() free its allocated memory
	ath9k_htc: release allocated buffer if timed out
	ath9k: release allocated buffer if timed out
	drm/amd/display: prevent memory leak
	btrfs: inode: Verify inode mode to avoid NULL pointer dereference
	sctp: implement memory accounting on tx path
	Btrfs: fix selftests failure due to uninitialized i_mode in test inodes
	PCI/ASPM: Disable ASPM on ASMedia ASM1083/1085 PCIe-to-PCI bridge
	9p/trans_fd: Fix concurrency del of req_list in p9_fd_cancelled/p9_read_work
	wireless: Use offsetof instead of custom macro.
	ARM: 8986/1: hw_breakpoint: Don't invoke overflow handler on uaccess watchpoints
	Revert "drm/amdgpu: Fix NULL dereference in dpm sysfs handlers"
	drm/amdgpu: Prevent kernel-infoleak in amdgpu_info_ioctl()
	drm: hold gem reference until object is no longer accessed
	rds: Prevent kernel-infoleak in rds_notify_queue_get()
	xfs: fix missed wakeup on l_flush_wait
	net/x25: Fix x25_neigh refcnt leak when x25 disconnect
	net/x25: Fix null-ptr-deref in x25_disconnect
	xfrm: Fix crash when the hold queue is used.
	selftests/net: rxtimestamp: fix clang issues for target arch PowerPC
	selftests/net: psock_fanout: fix clang issues for target arch PowerPC
	sh: Fix validation of system call number
	net/mlx5: Verify Hardware supports requested ptp function on a given pin
	net: lan78xx: add missing endpoint sanity check
	net: lan78xx: fix transfer-buffer memory leak
	mlx4: disable device on shutdown
	mlxsw: core: Increase scope of RCU read-side critical section
	mlxsw: core: Free EMAD transactions using kfree_rcu()
	ibmvnic: Fix IRQ mapping disposal in error path
	bpf: Fix map leak in HASH_OF_MAPS map
	mac80211: mesh: Free ie data when leaving mesh
	mac80211: mesh: Free pending skb when destroying a mpath
	arm64/alternatives: move length validation inside the subsection
	arm64: csum: Fix handling of bad packets
	Bluetooth: fix kernel oops in store_pending_adv_report
	net: gemini: Fix missing clk_disable_unprepare() in error path of gemini_ethernet_port_probe()
	net/mlx5e: fix bpf_prog reference count leaks in mlx5e_alloc_rq
	usb: hso: Fix debug compile warning on sparc32
	qed: Disable "MFW indication via attention" SPAM every 5 minutes
	nfc: s3fwrn5: add missing release on skb in s3fwrn5_recv_frame
	parisc: add support for cmpxchg on u8 pointers
	net: ethernet: ravb: exit if re-initialization fails in tx timeout
	Revert "i2c: cadence: Fix the hold bit setting"
	x86/unwind/orc: Fix ORC for newly forked tasks
	cxgb4: add missing release on skb in uld_send()
	xen-netfront: fix potential deadlock in xennet_remove()
	KVM: LAPIC: Prevent setting the tscdeadline timer if the lapic is hw disabled
	x86/i8259: Use printk_deferred() to prevent deadlock
	Linux 4.19.137

Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>
Change-Id: Ic57c1620f2febb595f4f764757b1792ffc866643
2020-08-05 12:07:48 +02:00
Rik van Riel
ab6291837d xfs: fix missed wakeup on l_flush_wait
commit cdea5459ce263fbc963657a7736762ae897a8ae6 upstream.

The code in xlog_wait uses the spinlock to make adding the task to
the wait queue, and setting the task state to UNINTERRUPTIBLE atomic
with respect to the waker.

Doing the wakeup after releasing the spinlock opens up the following
race condition:

Task 1					task 2
add task to wait queue
					wake up task
set task state to UNINTERRUPTIBLE

This issue was found through code inspection as a result of kworkers
being observed stuck in UNINTERRUPTIBLE state with an empty
wait queue. It is rare and largely unreproducable.

Simply moving the spin_unlock to after the wake_up_all results
in the waker not being able to see a task on the waitqueue before
it has set its state to UNINTERRUPTIBLE.

This bug dates back to the conversion of this code to generic
waitqueue infrastructure from a counting semaphore back in 2008
which didn't place the wakeups consistently w.r.t. to the relevant
spin locks.

[dchinner: Also fix a similar issue in the shutdown path on
xc_commit_wait. Update commit log with more details of the issue.]

Fixes: d748c62367 ("[XFS] Convert l_flushsema to a sv_t")
Reported-by: Chris Mason <clm@fb.com>
Signed-off-by: Rik van Riel <riel@surriel.com>
Signed-off-by: Dave Chinner <dchinner@redhat.com>
Reviewed-by: Darrick J. Wong <darrick.wong@oracle.com>
Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com>
Cc: stable@vger.kernel.org # 4.9.x-4.19.x
[modified for contextual change near xlog_state_do_callback()]
Signed-off-by: Samuel Mendoza-Jonas <samjonas@amazon.com>
Reviewed-by: Frank van der Linden <fllinden@amazon.com>
Reviewed-by: Suraj Jitindar Singh <surajjs@amazon.com>
Reviewed-by: Benjamin Herrenschmidt <benh@amazon.com>
Reviewed-by: Anchal Agarwal <anchalag@amazon.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2020-08-05 10:06:01 +02:00
Greg Kroah-Hartman
b3293788b9 Linux 4.19.131
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Merge 4.19.131 into android-4.19-stable

Changes in 4.19.131
	net: be more gentle about silly gso requests coming from user
	block/bio-integrity: don't free 'buf' if bio_integrity_add_page() failed
	fanotify: fix ignore mask logic for events on child and on dir
	mtd: rawnand: marvell: Fix the condition on a return code
	net: bcmgenet: remove HFB_CTRL access
	net: sched: export __netdev_watchdog_up()
	EDAC/amd64: Add Family 17h Model 30h PCI IDs
	i2c: tegra: Cleanup kerneldoc comments
	i2c: tegra: Add missing kerneldoc for some fields
	i2c: tegra: Fix Maximum transfer size
	fix a braino in "sparc32: fix register window handling in genregs32_[gs]et()"
	ALSA: hda/realtek - Enable the headset of ASUS B9450FA with ALC294
	ALSA: hda/realtek: Enable mute LED on an HP system
	ALSA: hda/realtek - Enable micmute LED on and HP system
	apparmor: don't try to replace stale label in ptraceme check
	ibmveth: Fix max MTU limit
	mld: fix memory leak in ipv6_mc_destroy_dev()
	net: bridge: enfore alignment for ethernet address
	net: fix memleak in register_netdevice()
	net: place xmit recursion in softnet data
	net: use correct this_cpu primitive in dev_recursion_level
	net: increment xmit_recursion level in dev_direct_xmit()
	net: usb: ax88179_178a: fix packet alignment padding
	rocker: fix incorrect error handling in dma_rings_init
	rxrpc: Fix notification call on completion of discarded calls
	sctp: Don't advertise IPv4 addresses if ipv6only is set on the socket
	tcp: don't ignore ECN CWR on pure ACK
	tcp: grow window for OOO packets only for SACK flows
	tg3: driver sleeps indefinitely when EEH errors exceed eeh_max_freezes
	ip6_gre: fix use-after-free in ip6gre_tunnel_lookup()
	net: phy: Check harder for errors in get_phy_id()
	ip_tunnel: fix use-after-free in ip_tunnel_lookup()
	sch_cake: don't try to reallocate or unshare skb unconditionally
	sch_cake: fix a few style nits
	tcp_cubic: fix spurious HYSTART_DELAY exit upon drop in min RTT
	sch_cake: don't call diffserv parsing code when it is not needed
	net: Fix the arp error in some cases
	net: Do not clear the sock TX queue in sk_set_socket()
	net: core: reduce recursion limit value
	USB: ohci-sm501: Add missed iounmap() in remove
	usb: dwc2: Postponed gadget registration to the udc class driver
	usb: add USB_QUIRK_DELAY_INIT for Logitech C922
	USB: ehci: reopen solution for Synopsys HC bug
	usb: host: xhci-mtk: avoid runtime suspend when removing hcd
	xhci: Poll for U0 after disabling USB2 LPM
	usb: host: ehci-exynos: Fix error check in exynos_ehci_probe()
	usb: typec: tcpci_rt1711h: avoid screaming irq causing boot hangs
	ALSA: usb-audio: add quirk for Denon DCD-1500RE
	ALSA: usb-audio: add quirk for Samsung USBC Headset (AKG)
	ALSA: usb-audio: Fix OOB access of mixer element list
	scsi: zfcp: Fix panic on ERP timeout for previously dismissed ERP action
	xhci: Fix incorrect EP_STATE_MASK
	xhci: Fix enumeration issue when setting max packet size for FS devices.
	xhci: Return if xHCI doesn't support LPM
	cdc-acm: Add DISABLE_ECHO quirk for Microchip/SMSC chip
	loop: replace kill_bdev with invalidate_bdev
	IB/mad: Fix use after free when destroying MAD agent
	cifs/smb3: Fix data inconsistent when punch hole
	cifs/smb3: Fix data inconsistent when zero file range
	xfrm: Fix double ESP trailer insertion in IPsec crypto offload.
	ASoC: q6asm: handle EOS correctly
	efi/esrt: Fix reference count leak in esre_create_sysfs_entry.
	regualtor: pfuze100: correct sw1a/sw2 on pfuze3000
	ASoC: fsl_ssi: Fix bclk calculation for mono channel
	ARM: dts: Fix duovero smsc interrupt for suspend
	x86/resctrl: Fix a NULL vs IS_ERR() static checker warning in rdt_cdp_peer_get()
	regmap: Fix memory leak from regmap_register_patch
	ARM: dts: NSP: Correct FA2 mailbox node
	rxrpc: Fix handling of rwind from an ACK packet
	RDMA/qedr: Fix KASAN: use-after-free in ucma_event_handler+0x532
	RDMA/cma: Protect bind_list and listen_list while finding matching cm id
	ASoC: rockchip: Fix a reference count leak.
	RDMA/mad: Fix possible memory leak in ib_mad_post_receive_mads()
	net: qed: fix left elements count calculation
	net: qed: fix NVMe login fails over VFs
	net: qed: fix excessive QM ILT lines consumption
	cxgb4: move handling L2T ARP failures to caller
	ARM: imx5: add missing put_device() call in imx_suspend_alloc_ocram()
	usb: gadget: udc: Potential Oops in error handling code
	netfilter: ipset: fix unaligned atomic access
	net: bcmgenet: use hardware padding of runt frames
	i2c: fsi: Fix the port number field in status register
	i2c: core: check returned size of emulated smbus block read
	sched/deadline: Initialize ->dl_boosted
	sched/core: Fix PI boosting between RT and DEADLINE tasks
	sata_rcar: handle pm_runtime_get_sync failure cases
	ata/libata: Fix usage of page address by page_address in ata_scsi_mode_select_xlat function
	drm/amd/display: Use kfree() to free rgb_user in calculate_user_regamma_ramp()
	riscv/atomic: Fix sign extension for RV64I
	hwrng: ks-sa - Fix runtime PM imbalance on error
	ibmvnic: Harden device login requests
	net: alx: fix race condition in alx_remove
	s390/ptrace: fix setting syscall number
	s390/vdso: fix vDSO clock_getres()
	arm64: sve: Fix build failure when ARM64_SVE=y and SYSCTL=n
	kbuild: improve cc-option to clean up all temporary files
	blktrace: break out of blktrace setup on concurrent calls
	RISC-V: Don't allow write+exec only page mapping request in mmap
	ALSA: hda: Add NVIDIA codec IDs 9a & 9d through a0 to patch table
	ALSA: hda/realtek - Add quirk for MSI GE63 laptop
	ACPI: sysfs: Fix pm_profile_attr type
	erofs: fix partially uninitialized misuse in z_erofs_onlinepage_fixup
	KVM: X86: Fix MSR range of APIC registers in X2APIC mode
	KVM: nVMX: Plumb L2 GPA through to PML emulation
	x86/asm/64: Align start of __clear_user() loop to 16-bytes
	btrfs: fix data block group relocation failure due to concurrent scrub
	btrfs: fix failure of RWF_NOWAIT write into prealloc extent beyond eof
	mm/slab: use memzero_explicit() in kzfree()
	ocfs2: avoid inode removal while nfsd is accessing it
	ocfs2: load global_inode_alloc
	ocfs2: fix value of OCFS2_INVALID_SLOT
	ocfs2: fix panic on nfs server over ocfs2
	arm64: perf: Report the PC value in REGS_ABI_32 mode
	tracing: Fix event trigger to accept redundant spaces
	ring-buffer: Zero out time extend if it is nested and not absolute
	drm: rcar-du: Fix build error
	drm/radeon: fix fb_div check in ni_init_smc_spll_table()
	Staging: rtl8723bs: prevent buffer overflow in update_sta_support_rate()
	sunrpc: fixed rollback in rpc_gssd_dummy_populate()
	SUNRPC: Properly set the @subbuf parameter of xdr_buf_subsegment()
	pNFS/flexfiles: Fix list corruption if the mirror count changes
	NFSv4 fix CLOSE not waiting for direct IO compeletion
	dm writecache: correct uncommitted_block when discarding uncommitted entry
	dm writecache: add cond_resched to loop in persistent_memory_claim()
	xfs: add agf freeblocks verify in xfs_agf_verify
	Revert "tty: hvc: Fix data abort due to race in hvc_open"
	Linux 4.19.131

Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>
Change-Id: I2c5abdfc2979e50d441bb0e0bcd499e03c61cefd
2020-07-01 13:11:06 +02:00
Zheng Bin
135eccd839 xfs: add agf freeblocks verify in xfs_agf_verify
[ Upstream commit d0c7feaf87678371c2c09b3709400be416b2dc62 ]

We recently used fuzz(hydra) to test XFS and automatically generate
tmp.img(XFS v5 format, but some metadata is wrong)

xfs_repair information(just one AG):
agf_freeblks 0, counted 3224 in ag 0
agf_longest 536874136, counted 3224 in ag 0
sb_fdblocks 613, counted 3228

Test as follows:
mount tmp.img tmpdir
cp file1M tmpdir
sync

In 4.19-stable, sync will stuck, the reason is:
xfs_mountfs
  xfs_check_summary_counts
    if ((!xfs_sb_version_haslazysbcount(&mp->m_sb) ||
       XFS_LAST_UNMOUNT_WAS_CLEAN(mp)) &&
       !xfs_fs_has_sickness(mp, XFS_SICK_FS_COUNTERS))
	return 0;  -->just return, incore sb_fdblocks still be 613
    xfs_initialize_perag_data

cp file1M tmpdir -->ok(write file to pagecache)
sync -->stuck(write pagecache to disk)
xfs_map_blocks
  xfs_iomap_write_allocate
    while (count_fsb != 0) {
      nimaps = 0;
      while (nimaps == 0) { --> endless loop
         nimaps = 1;
         xfs_bmapi_write(..., &nimaps) --> nimaps becomes 0 again
xfs_bmapi_write
  xfs_bmap_alloc
    xfs_bmap_btalloc
      xfs_alloc_vextent
        xfs_alloc_fix_freelist
          xfs_alloc_space_available -->fail(agf_freeblks is 0)

In linux-next, sync not stuck, cause commit c2b3164320b5 ("xfs:
use the latest extent at writeback delalloc conversion time") remove
the above while, dmesg is as follows:
[   55.250114] XFS (loop0): page discard on page ffffea0008bc7380, inode 0x1b0c, offset 0.

Users do not know why this page is discard, the better soultion is:
1. Like xfs_repair, make sure sb_fdblocks is equal to counted
(xfs_initialize_perag_data did this, who is not called at this mount)
2. Add agf verify, if fail, will tell users to repair

This patch use the second soultion.

Signed-off-by: Zheng Bin <zhengbin13@huawei.com>
Signed-off-by: Ren Xudong <renxudong1@huawei.com>
Reviewed-by: Darrick J. Wong <darrick.wong@oracle.com>
Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
2020-06-30 23:17:19 -04:00
Jaegeuk Kim
c95d6ed4e7 Merge remote-tracking branch 'aosp/upstream-f2fs-stable-linux-4.19.y' into android-4.19-stable
This has one fix in advance merged in f2fs-stable.
("xfs: drop I_DIRTY_TIME_EXPIRED")

* aosp/upstream-f2fs-stable-linux-4.19.y:
  writeback: Drop I_DIRTY_TIME_EXPIRE
  writeback: Fix sync livelock due to b_dirty_time processing
  writeback: Avoid skipping inode writeback
  writeback: Protect inode->i_io_list with inode->i_lock
  Revert "writeback: Avoid skipping inode writeback"

Bug: 154542664
Change-Id: I98a6258cb60227e6ca02e57bf7adf28ab7816cbf
Signed-off-by: Jaegeuk Kim <jaegeuk@google.com>
2020-06-24 13:31:46 -07:00
Brian Foster
edd9482730 xfs: fix duplicate verification from xfs_qm_dqflush()
[ Upstream commit 629dcb38dc351947ed6a26a997d4b587f3bd5c7e ]

The pre-flush dquot verification in xfs_qm_dqflush() duplicates the
read verifier by checking the dquot in the on-disk buffer. Instead,
verify the in-core variant before it is flushed to the buffer.

Fixes: 7224fa482a ("xfs: add full xfs_dqblk verifier")
Signed-off-by: Brian Foster <bfoster@redhat.com>
Reviewed-by: Dave Chinner <dchinner@redhat.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Allison Collins <allison.henderson@oracle.com>
Reviewed-by: Darrick J. Wong <darrick.wong@oracle.com>
Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
2020-06-22 09:05:16 +02:00
Brian Foster
cc9485cd59 xfs: reset buffer write failure state on successful completion
[ Upstream commit b6983e80b03bd4fd42de71993b3ac7403edac758 ]

The buffer write failure flag is intended to control the internal
write retry that XFS has historically implemented to help mitigate
the severity of transient I/O errors. The flag is set when a buffer
is resubmitted from the I/O completion path due to a previous
failure. It is checked on subsequent I/O completions to skip the
internal retry and fall through to the higher level configurable
error handling mechanism. The flag is cleared in the synchronous and
delwri submission paths and also checked in various places to log
write failure messages.

There are a couple minor problems with the current usage of this
flag. One is that we issue an internal retry after every submission
from xfsaild due to how delwri submission clears the flag. This
results in double the expected or configured number of write
attempts when under sustained failures. Another more subtle issue is
that the flag is never cleared on successful I/O completion. This
can cause xfs_wait_buftarg() to suggest that dirty buffers are being
thrown away due to the existence of the flag, when the reality is
that the flag might still be set because the write succeeded on the
retry.

Clear the write failure flag on successful I/O completion to address
both of these problems. This means that the internal retry attempt
occurs once since the last time a buffer write failed and that
various other contexts only see the flag set when the immediately
previous write attempt has failed.

Signed-off-by: Brian Foster <bfoster@redhat.com>
Reviewed-by: Darrick J. Wong <darrick.wong@oracle.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Allison Collins <allison.henderson@oracle.com>
Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
2020-06-22 09:05:16 +02:00
Darrick J. Wong
c69572fd2a xfs: clean up the error handling in xfs_swap_extents
[ Upstream commit 8bc3b5e4b70d28f8edcafc3c9e4de515998eea9e ]

Make sure we release resources properly if we cannot clean out the COW
extents in preparation for an extent swap.

Fixes: 96987eea537d6c ("xfs: cancel COW blocks before swapext")
Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Sasha Levin <sashal@kernel.org>
2020-06-22 09:05:15 +02:00
Darrick J. Wong
9276babd9d xfs: fix partially uninitialized structure in xfs_reflink_remap_extent
[ Upstream commit c142932c29e533ee892f87b44d8abc5719edceec ]

In the reflink extent remap function, it turns out that uirec (the block
mapping corresponding only to the part of the passed-in mapping that got
unmapped) was not fully initialized.  Specifically, br_state was not
being copied from the passed-in struct to the uirec.  This could lead to
unpredictable results such as the reflinked mapping being marked
unwritten in the destination file.

Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com>
Reviewed-by: Brian Foster <bfoster@redhat.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
2020-05-02 17:25:55 +02:00
Eric Biggers
aef81b0ffd xfs: clear PF_MEMALLOC before exiting xfsaild thread
commit 10a98cb16d80be3595fdb165fad898bb28b8b6d2 upstream.

Leaving PF_MEMALLOC set when exiting a kthread causes it to remain set
during do_exit().  That can confuse things.  In particular, if BSD
process accounting is enabled, then do_exit() writes data to an
accounting file.  If that file has FS_SYNC_FL set, then this write
occurs synchronously and can misbehave if PF_MEMALLOC is set.

For example, if the accounting file is located on an XFS filesystem,
then a WARN_ON_ONCE() in iomap_do_writepage() is triggered and the data
doesn't get written when it should.  Or if the accounting file is
located on an ext4 filesystem without a journal, then a WARN_ON_ONCE()
in ext4_write_inode() is triggered and the inode doesn't get written.

Fix this in xfsaild() by using the helper functions to save and restore
PF_MEMALLOC.

This can be reproduced as follows in the kvm-xfstests test appliance
modified to add the 'acct' Debian package, and with kvm-xfstests's
recommended kconfig modified to add CONFIG_BSD_PROCESS_ACCT=y:

        mkfs.xfs -f /dev/vdb
        mount /vdb
        touch /vdb/file
        chattr +S /vdb/file
        accton /vdb/file
        mkfs.xfs -f /dev/vdc
        mount /vdc
        umount /vdc

It causes:
	WARNING: CPU: 1 PID: 336 at fs/iomap/buffered-io.c:1534
	CPU: 1 PID: 336 Comm: xfsaild/vdc Not tainted 5.6.0-rc5 #3
	Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS ?-20191223_100556-anatol 04/01/2014
	RIP: 0010:iomap_do_writepage+0x16b/0x1f0 fs/iomap/buffered-io.c:1534
	[...]
	Call Trace:
	 write_cache_pages+0x189/0x4d0 mm/page-writeback.c:2238
	 iomap_writepages+0x1c/0x33 fs/iomap/buffered-io.c:1642
	 xfs_vm_writepages+0x65/0x90 fs/xfs/xfs_aops.c:578
	 do_writepages+0x41/0xe0 mm/page-writeback.c:2344
	 __filemap_fdatawrite_range+0xd2/0x120 mm/filemap.c:421
	 file_write_and_wait_range+0x71/0xc0 mm/filemap.c:760
	 xfs_file_fsync+0x7a/0x2b0 fs/xfs/xfs_file.c:114
	 generic_write_sync include/linux/fs.h:2867 [inline]
	 xfs_file_buffered_aio_write+0x379/0x3b0 fs/xfs/xfs_file.c:691
	 call_write_iter include/linux/fs.h:1901 [inline]
	 new_sync_write+0x130/0x1d0 fs/read_write.c:483
	 __kernel_write+0x54/0xe0 fs/read_write.c:515
	 do_acct_process+0x122/0x170 kernel/acct.c:522
	 slow_acct_process kernel/acct.c:581 [inline]
	 acct_process+0x1d4/0x27c kernel/acct.c:607
	 do_exit+0x83d/0xbc0 kernel/exit.c:791
	 kthread+0xf1/0x140 kernel/kthread.c:257
	 ret_from_fork+0x27/0x50 arch/x86/entry/entry_64.S:352

This bug was originally reported by syzbot at
https://lore.kernel.org/r/0000000000000e7156059f751d7b@google.com.

Reported-by: syzbot+1f9dc49e8de2582d90c2@syzkaller.appspotmail.com
Signed-off-by: Eric Biggers <ebiggers@google.com>
Reviewed-by: Darrick J. Wong <darrick.wong@oracle.com>
Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2020-05-02 17:25:54 +02:00
Brian Foster
88e28547f0 xfs: acquire superblock freeze protection on eofblocks scans
commit 4b674b9ac852937af1f8c62f730c325fb6eadcdb upstream.

The filesystem freeze sequence in XFS waits on any background
eofblocks or cowblocks scans to complete before the filesystem is
quiesced. At this point, the freezer has already stopped the
transaction subsystem, however, which means a truncate or cowblock
cancellation in progress is likely blocked in transaction
allocation. This results in a deadlock between freeze and the
associated scanner.

Fix this problem by holding superblock write protection across calls
into the block reapers. Since protection for background scans is
acquired from the workqueue task context, trylock to avoid a similar
deadlock between freeze and blocking on the write lock.

Fixes: d6b636ebb1 ("xfs: halt auto-reclamation activities while rebuilding rmap")
Reported-by: Paul Furtado <paulfurtado91@gmail.com>
Signed-off-by: Brian Foster <bfoster@redhat.com>
Reviewed-by: Chandan Rajendra <chandanrlinux@gmail.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Allison Collins <allison.henderson@oracle.com>
Reviewed-by: Darrick J. Wong <darrick.wong@oracle.com>
Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2020-05-02 17:25:51 +02:00
kaixuxia
6fb102dd99 xfs: Fix deadlock between AGI and AGF with RENAME_WHITEOUT
commit bc56ad8c74b8588685c2875de0df8ab6974828ef upstream.

When performing rename operation with RENAME_WHITEOUT flag, we will
hold AGF lock to allocate or free extents in manipulating the dirents
firstly, and then doing the xfs_iunlink_remove() call last to hold
AGI lock to modify the tmpfile info, so we the lock order AGI->AGF.

The big problem here is that we have an ordering constraint on AGF
and AGI locking - inode allocation locks the AGI, then can allocate
a new extent for new inodes, locking the AGF after the AGI. Hence
the ordering that is imposed by other parts of the code is AGI before
AGF. So we get an ABBA deadlock between the AGI and AGF here.

Process A:
Call trace:
 ? __schedule+0x2bd/0x620
 schedule+0x33/0x90
 schedule_timeout+0x17d/0x290
 __down_common+0xef/0x125
 ? xfs_buf_find+0x215/0x6c0 [xfs]
 down+0x3b/0x50
 xfs_buf_lock+0x34/0xf0 [xfs]
 xfs_buf_find+0x215/0x6c0 [xfs]
 xfs_buf_get_map+0x37/0x230 [xfs]
 xfs_buf_read_map+0x29/0x190 [xfs]
 xfs_trans_read_buf_map+0x13d/0x520 [xfs]
 xfs_read_agf+0xa6/0x180 [xfs]
 ? schedule_timeout+0x17d/0x290
 xfs_alloc_read_agf+0x52/0x1f0 [xfs]
 xfs_alloc_fix_freelist+0x432/0x590 [xfs]
 ? down+0x3b/0x50
 ? xfs_buf_lock+0x34/0xf0 [xfs]
 ? xfs_buf_find+0x215/0x6c0 [xfs]
 xfs_alloc_vextent+0x301/0x6c0 [xfs]
 xfs_ialloc_ag_alloc+0x182/0x700 [xfs]
 ? _xfs_trans_bjoin+0x72/0xf0 [xfs]
 xfs_dialloc+0x116/0x290 [xfs]
 xfs_ialloc+0x6d/0x5e0 [xfs]
 ? xfs_log_reserve+0x165/0x280 [xfs]
 xfs_dir_ialloc+0x8c/0x240 [xfs]
 xfs_create+0x35a/0x610 [xfs]
 xfs_generic_create+0x1f1/0x2f0 [xfs]
 ...

Process B:
Call trace:
 ? __schedule+0x2bd/0x620
 ? xfs_bmapi_allocate+0x245/0x380 [xfs]
 schedule+0x33/0x90
 schedule_timeout+0x17d/0x290
 ? xfs_buf_find+0x1fd/0x6c0 [xfs]
 __down_common+0xef/0x125
 ? xfs_buf_get_map+0x37/0x230 [xfs]
 ? xfs_buf_find+0x215/0x6c0 [xfs]
 down+0x3b/0x50
 xfs_buf_lock+0x34/0xf0 [xfs]
 xfs_buf_find+0x215/0x6c0 [xfs]
 xfs_buf_get_map+0x37/0x230 [xfs]
 xfs_buf_read_map+0x29/0x190 [xfs]
 xfs_trans_read_buf_map+0x13d/0x520 [xfs]
 xfs_read_agi+0xa8/0x160 [xfs]
 xfs_iunlink_remove+0x6f/0x2a0 [xfs]
 ? current_time+0x46/0x80
 ? xfs_trans_ichgtime+0x39/0xb0 [xfs]
 xfs_rename+0x57a/0xae0 [xfs]
 xfs_vn_rename+0xe4/0x150 [xfs]
 ...

In this patch we move the xfs_iunlink_remove() call to
before acquiring the AGF lock to preserve correct AGI/AGF locking
order.

[Minor massage required due to upstream change making xfs_bumplink() a
void function where as in the 4.19.y tree the return value is checked,
even though it is always zero. Only change was to the last code block
removed by the patch. Functionally equivalent to upstream.]

Signed-off-by: kaixuxia <kaixuxia@tencent.com>
Reviewed-by: Brian Foster <bfoster@redhat.com>
Reviewed-by: Darrick J. Wong <darrick.wong@oracle.com>
Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com>
Signed-off-by: Suraj Jitindar Singh <surajjs@amazon.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2020-04-29 16:31:34 +02:00
Jan Kara
2708c4cd3a xfs: Sanity check flags of Q_XQUOTARM call
commit 3dd4d40b420846dd35869ccc8f8627feef2cff32 upstream.

Flags passed to Q_XQUOTARM were not sanity checked for invalid values.
Fix that.

Fixes: 9da93f9b7c ("xfs: fix Q_XQUOTARM ioctl")
Reported-by: Yang Xu <xuyang2018.jy@cn.fujitsu.com>
Signed-off-by: Jan Kara <jack@suse.cz>
Reviewed-by: Eric Sandeen <sandeen@redhat.com>
Reviewed-by: Darrick J. Wong <darrick.wong@oracle.com>
Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2020-01-27 14:49:51 +01:00
Darrick J. Wong
58a4661896 xfs: periodically yield scrub threads to the scheduler
[ Upstream commit 5d1116d4c6af3e580f1ed0382ca5a94bd65a34cf ]

Christoph Hellwig complained about the following soft lockup warning
when running scrub after generic/175 when preemption is disabled and
slub debugging is enabled:

watchdog: BUG: soft lockup - CPU#3 stuck for 22s! [xfs_scrub:161]
Modules linked in:
irq event stamp: 41692326
hardirqs last  enabled at (41692325): [<ffffffff8232c3b7>] _raw_0
hardirqs last disabled at (41692326): [<ffffffff81001c5a>] trace0
softirqs last  enabled at (41684994): [<ffffffff8260031f>] __do_e
softirqs last disabled at (41684987): [<ffffffff81127d8c>] irq_e0
CPU: 3 PID: 16189 Comm: xfs_scrub Not tainted 5.4.0-rc3+ #30
Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.124
RIP: 0010:_raw_spin_unlock_irqrestore+0x39/0x40
Code: 89 f3 be 01 00 00 00 e8 d5 3a e5 fe 48 89 ef e8 ed 87 e5 f2
RSP: 0018:ffffc9000233f970 EFLAGS: 00000286 ORIG_RAX: ffffffffff3
RAX: ffff88813b398040 RBX: 0000000000000286 RCX: 0000000000000006
RDX: 0000000000000006 RSI: ffff88813b3988c0 RDI: ffff88813b398040
RBP: ffff888137958640 R08: 0000000000000001 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000000 R12: ffffea00042b0c00
R13: 0000000000000001 R14: ffff88810ac32308 R15: ffff8881376fc040
FS:  00007f6113dea700(0000) GS:ffff88813bb80000(0000) knlGS:00000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f6113de8ff8 CR3: 000000012f290000 CR4: 00000000000006e0
Call Trace:
 free_debug_processing+0x1dd/0x240
 __slab_free+0x231/0x410
 kmem_cache_free+0x30e/0x360
 xchk_ag_btcur_free+0x76/0xb0
 xchk_ag_free+0x10/0x80
 xchk_bmap_iextent_xref.isra.14+0xd9/0x120
 xchk_bmap_iextent+0x187/0x210
 xchk_bmap+0x2e0/0x3b0
 xfs_scrub_metadata+0x2e7/0x500
 xfs_ioc_scrub_metadata+0x4a/0xa0
 xfs_file_ioctl+0x58a/0xcd0
 do_vfs_ioctl+0xa0/0x6f0
 ksys_ioctl+0x5b/0x90
 __x64_sys_ioctl+0x11/0x20
 do_syscall_64+0x4b/0x1a0
 entry_SYSCALL_64_after_hwframe+0x49/0xbe

If preemption is disabled, all metadata buffers needed to perform the
scrub are already in memory, and there are a lot of records to check,
it's possible that the scrub thread will run for an extended period of
time without sleeping for IO or any other reason.  Then the watchdog
timer or the RCU stall timeout can trigger, producing the backtrace
above.

To fix this problem, call cond_resched() from the scrub thread so that
we back out to the scheduler whenever necessary.

Reported-by: Christoph Hellwig <hch@infradead.org>
Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Sasha Levin <sashal@kernel.org>
2020-01-09 10:19:09 +01:00
Omar Sandoval
e1ceceb494 xfs: don't check for AG deadlock for realtime files in bunmapi
commit 69ffe5960df16938bccfe1b65382af0b3de51265 upstream.

Commit 5b094d6dac ("xfs: fix multi-AG deadlock in xfs_bunmapi") added
a check in __xfs_bunmapi() to stop early if we would touch multiple AGs
in the wrong order. However, this check isn't applicable for realtime
files. In most cases, it just makes us do unnecessary commits. However,
without the fix from the previous commit ("xfs: fix realtime file data
space leak"), if the last and second-to-last extents also happen to have
different "AG numbers", then the break actually causes __xfs_bunmapi()
to return without making any progress, which sends
xfs_itruncate_extents_flags() into an infinite loop.

Fixes: 5b094d6dac ("xfs: fix multi-AG deadlock in xfs_bunmapi")
Signed-off-by: Omar Sandoval <osandov@fb.com>
Reviewed-by: Darrick J. Wong <darrick.wong@oracle.com>
Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2020-01-09 10:19:04 +01:00
Brian Foster
d47137ce79 xfs: fix mount failure crash on invalid iclog memory access
[ Upstream commit 798a9cada4694ca8d970259f216cec47e675bfd5 ]

syzbot (via KASAN) reports a use-after-free in the error path of
xlog_alloc_log(). Specifically, the iclog freeing loop doesn't
handle the case of a fully initialized ->l_iclog linked list.
Instead, it assumes that the list is partially constructed and NULL
terminated.

This bug manifested because there was no possible error scenario
after iclog list setup when the original code was added.  Subsequent
code and associated error conditions were added some time later,
while the original error handling code was never updated. Fix up the
error loop to terminate either on a NULL iclog or reaching the end
of the list.

Reported-by: syzbot+c732f8644185de340492@syzkaller.appspotmail.com
Signed-off-by: Brian Foster <bfoster@redhat.com>
Reviewed-by: Darrick J. Wong <darrick.wong@oracle.com>
Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
2020-01-09 10:18:59 +01:00
Brian Foster
17559e35fc xfs: add missing error check in xfs_prepare_shift()
commit 1749d1ea89bdf3181328b7d846e609d5a0e53e50 upstream.

xfs_prepare_shift() fails to check the error return from
xfs_flush_unmap_range(). If the latter fails, that could lead to an
insert/collapse range operation over a delalloc range, which is not
supported.

Add an error check and return appropriately. This is reproduced
rarely by generic/475.

Fixes: 7f9f71be84bc ("xfs: extent shifting doesn't fully invalidate page cache")
Signed-off-by: Brian Foster <bfoster@redhat.com>
Reviewed-by: Darrick J. Wong <darrick.wong@oracle.com>
Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com>
Reviewed-by: Allison Collins <allison.henderson@oracle.com>
Reviewed-by: Dave Chinner <dchinner@redhat.com>
Cc: Nobuhiro Iwamatsu <nobuhiro1.iwamatsu@toshiba.co.jp>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2019-12-13 08:52:57 +01:00
Dave Chinner
249279c677 xfs: extent shifting doesn't fully invalidate page cache
[ Upstream commit 7f9f71be84bcab368e58020a42f6d0dd97adf0ce ]

The extent shifting code uses a flush and invalidate mechainsm prior
to shifting extents around. This is similar to what
xfs_free_file_space() does, but it doesn't take into account things
like page cache vs block size differences, and it will fail if there
is a page that it currently busy.

xfs_flush_unmap_range() handles all of these cases, so just convert
xfs_prepare_shift() to us that mechanism rather than having it's own
special sauce.

Signed-off-by: Dave Chinner <dchinner@redhat.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Darrick J. Wong <darrick.wong@oracle.com>
Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
2019-12-13 08:51:29 +01:00
Brian Foster
fe685954ee xfs: end sync buffer I/O properly on shutdown error
[ Upstream commit 465fa17f4a303d9fdff9eac4d45f91ece92e96ca ]

As of commit e339dd8d8b ("xfs: use sync buffer I/O for sync delwri
queue submission"), the delwri submission code uses sync buffer I/O
for sync delwri I/O. Instead of waiting on async I/O to unlock the
buffer, it uses the underlying sync I/O completion mechanism.

If delwri buffer submission fails due to a shutdown scenario, an
error is set on the buffer and buffer completion never occurs. This
can cause xfs_buf_delwri_submit() to deadlock waiting on a
completion event.

We could check the error state before waiting on such buffers, but
that doesn't serialize against the case of an error set via a racing
I/O completion. Instead, invoke I/O completion in the shutdown case
regardless of buffer I/O type.

Signed-off-by: Brian Foster <bfoster@redhat.com>
Reviewed-by: Dave Chinner <dchinner@redhat.com>
Reviewed-by: Darrick J. Wong <darrick.wong@oracle.com>
Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
2019-12-05 09:21:08 +01:00
Nick Bowler
68cb344cca xfs: Fix bulkstat compat ioctls on x32 userspace.
[ Upstream commit 7ca860e3c1a74ad6bd8949364073ef1044cad758 ]

The bulkstat family of ioctls are problematic on x32, because there is
a mixup of native 32-bit and 64-bit conventions.  The xfs_fsop_bulkreq
struct contains pointers and 32-bit integers so that matches the native
32-bit layout, and that means the ioctl implementation goes into the
regular compat path on x32.

However, the 'ubuffer' member of that struct in turn refers to either
struct xfs_inogrp or xfs_bstat (or an array of these).  On x32, those
structures match the native 64-bit layout.  The compat implementation
writes out the 32-bit version of these structures.  This is not the
expected format for x32 userspace, causing problems.

Fortunately the functions which actually output these xfs_inogrp and
xfs_bstat structures have an easy way to select which output format
is required, so we just need a little tweak to select the right format
on x32.

Signed-off-by: Nick Bowler <nbowler@draconx.ca>
Reviewed-by: Darrick J. Wong <darrick.wong@oracle.com>
Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
2019-12-05 09:20:37 +01:00
Nick Bowler
5d8d2116c1 xfs: Align compat attrlist_by_handle with native implementation.
[ Upstream commit c456d64449efe37da50832b63d91652a85ea1d20 ]

While inspecting the ioctl implementations, I noticed that the compat
implementation of XFS_IOC_ATTRLIST_BY_HANDLE does not do exactly the
same thing as the native implementation.  Specifically, the "cursor"
does not appear to be written out to userspace on the compat path,
like it is on the native path.

This adjusts the compat implementation to copy out the cursor just
like the native implementation does.  The attrlist cursor does not
require any special compat handling.  This fixes xfstests xfs/269
on both IA-32 and x32 userspace, when running on an amd64 kernel.

Signed-off-by: Nick Bowler <nbowler@draconx.ca>
Fixes: 0facef7fb0 ("xfs: in _attrlist_by_handle, copy the cursor back to userspace")
Reviewed-by: Darrick J. Wong <darrick.wong@oracle.com>
Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
2019-12-05 09:20:37 +01:00
Darrick J. Wong
2f99d478dd xfs: require both realtime inodes to mount
[ Upstream commit 64bafd2f1e484e27071e7584642005d56516cb77 ]

Since mkfs always formats the filesystem with the realtime bitmap and
summary inodes immediately after the root directory, we should expect
that both of them are present and loadable, even if there isn't a
realtime volume attached.  There's no reason to skip this if rbmino ==
NULLFSINO; in fact, this causes an immediate crash if the there /is/ a
realtime volume and someone writes to it.

Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com>
Reviewed-by: Bill O'Donnell <billodo@redhat.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
2019-12-05 09:20:08 +01:00
Dave Chinner
22227437ca xfs: zero length symlinks are not valid
[ Upstream commit 43feeea88c9cb2955b9f7ba8152ec5abeea42810 ]

A log recovery failure has been reproduced where a symlink inode has
a zero length in extent form. It was caused by a shutdown during a
combined fstress+fsmark workload.

The underlying problem is the issue in xfs_inactive_symlink(): the
inode is unlocked between the symlink inactivation/truncation and
the inode being freed. This opens a window for the inode to be
written to disk before it xfs_ifree() removes it from the unlinked
list, marks it free in the inobt and zeros the mode.

For shortform inodes, the fix is simple. xfs_ifree() clears the data
fork state, so there's no need to do it in xfs_inactive_symlink().
This means the shortform fork verifier will not see a zero length
data fork as it mirrors the inode size through to xfs_ifree()), and
hence if the inode gets written back and the fork verifiers are run
they will still see a fork that matches the on-disk inode size.

For extent form (remote) symlinks, it is a little more tricky. Here
we explicitly set the inode size to zero, so the above race can lead
to zero length symlinks on disk. Because the inode is unlinked at
this point (i.e. on the unlinked list) and unreferenced, it can
never be seen again by a user. Hence when we set the inode size to
zeor, also change the type to S_IFREG. xfs_ifree() expects S_IFREG
inodes to be of zero length, and so this avoids all the problems of
zero length symlinks ever hitting the disk. It also avoids the
problem of needing to handle zero length symlink inodes in log
recovery to replay the extent free intents and the remaining
deferops to free the extents the symlink used.

Also add a couple of asserts to warn us if zero length symlinks end
up in either the symlink create or inactivation paths.

Signed-off-by: Dave Chinner <dchinner@redhat.com>
Reviewed-by: Darrick J. Wong <darrick.wong@oracle.com>
Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
2019-12-05 09:20:02 +01:00