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Kernel sources for Moto G9 (Play) (Guamp)
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Todd Kjos 7c70644026 binder: fix async_free_space accounting for empty parcels 
commit cfd0d84ba28c18b531648c9d4a35ecca89ad9901 upstream.

In 4.13, commit 74310e06be ("android: binder: Move buffer out of area shared with user space")
fixed a kernel structure visibility issue. As part of that patch,
sizeof(void *) was used as the buffer size for 0-length data payloads so
the driver could detect abusive clients sending 0-length asynchronous
transactions to a server by enforcing limits on async_free_size.

Unfortunately, on the "free" side, the accounting of async_free_space
did not add the sizeof(void *) back. The result was that up to 8-bytes of
async_free_space were leaked on every async transaction of 8-bytes or
less.  These small transactions are uncommon, so this accounting issue
has gone undetected for several years.

The fix is to use "buffer_size" (the allocated buffer size) instead of
"size" (the logical buffer size) when updating the async_free_space
during the free operation. These are the same except for this
corner case of asynchronous transactions with payloads < 8 bytes.

Fixes: 74310e06be ("android: binder: Move buffer out of area shared with user space")
Signed-off-by: Todd Kjos <tkjos@google.com>
Cc: stable@vger.kernel.org # 4.14+
Link: https://lore.kernel.org/r/20211220190150.2107077-1-tkjos@google.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2022-01-05 12:34:59 +01:00
arch ARM: 9169/1: entry: fix Thumb2 bug in iWMMXt exception handling 2021-12-29 12:20:47 +01:00
block block, bfq: fix use after free in bfq_bfqq_expire 2021-12-29 12:20:43 +01:00
certs certs: Trigger creation of RSA module signing key if it's not an RSA key 2021-09-22 11:47:51 +02:00
crypto crypto: pcrypt - Delay write to padata->info 2021-11-26 11:36:11 +01:00
Documentation Input: i8042 - add deferred probe support 2022-01-05 12:34:57 +01:00
drivers binder: fix async_free_space accounting for empty parcels 2022-01-05 12:34:59 +01:00
firmware Fix built-in early-load Intel microcode alignment 2020-01-23 08:21:29 +01:00
fs f2fs: fix to do sanity check on last xattr entry in __f2fs_setxattr() 2021-12-29 12:20:47 +01:00
include uapi: fix linux/nfc.h userspace compilation errors 2022-01-05 12:34:59 +01:00
init pid: take a reference when initializing cad_pid 2021-06-10 13:24:06 +02:00
ipc shm: extend forced shm destroy to support objects from several IPC nses 2021-12-08 08:50:11 +01:00
kernel timekeeping: Really make sure wall_to_monotonic isn't positive 2021-12-22 09:19:03 +01:00
lib ARM: 8800/1: use choice for kernel unwinders 2021-12-22 09:19:03 +01:00
LICENSES LICENSES: Remove CC-BY-SA-4.0 license text 2018-10-18 11:28:50 +02:00
mm mm: bdi: initialize bdi_min_ratio when bdi is unregistered 2021-12-14 10:18:05 +01:00
net sctp: use call_rcu to free endpoint 2022-01-05 12:34:58 +01:00
samples samples/kretprobes: Fix return value if register_kretprobe() failed 2021-11-26 11:36:11 +01:00
scripts recordmcount.pl: fix typo in s390 mcount regex 2022-01-05 12:34:58 +01:00
security selinux: initialize proto variable in selinux_ip_postroute_compat() 2022-01-05 12:34:58 +01:00
sound ALSA: drivers: opl3: Fix incorrect use of vp->state 2021-12-29 12:20:46 +01:00
tools selftests/net: udpgso_bench_tx: fix dst ip argument 2022-01-05 12:34:59 +01:00
usr initramfs: restore default compression behavior 2020-04-13 10:44:59 +02:00
virt KVM: remember position in kvm->vcpus array 2021-09-26 13:39:46 +02:00
.clang-format clang-format: Set IndentWrappedFunctionNames false 2018-08-01 18:38:51 +02:00
.cocciconfig
.get_maintainer.ignore
.gitattributes .gitattributes: set git diff driver for C source code files 2016-10-07 18:46:30 -07:00
.gitignore Kbuild updates for v4.17 (2nd) 2018-04-15 17:21:30 -07:00
.mailmap libnvdimm-for-4.19_misc 2018-08-25 18:13:10 -07:00
COPYING COPYING: use the new text with points to the license files 2018-03-23 12:41:45 -06:00
CREDITS 9p: remove Ron Minnich from MAINTAINERS 2018-08-17 16:20:26 -07:00
Kbuild Kbuild updates for v4.15 2017-11-17 17:45:29 -08:00
Kconfig kconfig: move the "Executable file formats" menu to fs/Kconfig.binfmt 2018-08-02 08:06:55 +09:00
MAINTAINERS Documentation/llvm: add documentation on building w/ Clang/LLVM 2020-09-26 18:01:31 +02:00
Makefile Linux 4.19.223 2021-12-29 12:20:49 +01:00
README Docs: Added a pointer to the formatted docs to README 2018-03-21 09:02:53 -06:00

README 

Linux kernel
============

There are several guides for kernel developers and users. These guides can
be rendered in a number of formats, like HTML and PDF. Please read
Documentation/admin-guide/README.rst first.

In order to build the documentation, use ``make htmldocs`` or
``make pdfdocs``.  The formatted documentation can also be read online at:

    https://www.kernel.org/doc/html/latest/

There are various text files in the Documentation/ subdirectory,
several of them using the Restructured Text markup notation.
See Documentation/00-INDEX for a list of what is contained in each file.

Please read the Documentation/process/changes.rst file, as it contains the
requirements for building and running the kernel, and information about
the problems which may result by upgrading your kernel.