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Thomas Gleixner 3c80fe4ac9 audit: Call tty_audit_push_task() outside preempt disabled 
While auditing all tasklist_lock read_lock sites I stumbled over the
following call chain:

audit_prepare_user_tty()
  read_lock(&tasklist_lock);
  tty_audit_push_task();
     mutex_lock(&buf->mutex);

     --> buf->mutex is locked with preemption disabled.

Solve this by acquiring a reference to the task struct under
rcu_read_lock and call tty_audit_push_task outside of the preempt
disabled region.

Move all code which needs to be protected by sighand lock into
tty_audit_push_task() and use lock/unlock_sighand as we do not hold
tasklist_lock.

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Cc: Al Viro <viro@zeniv.linux.org.uk>
Cc: Eric Paris <eparis@redhat.com>
Cc: Oleg Nesterov <oleg@redhat.com>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2010-10-30 08:45:25 -04:00
..
accessibility
acpi Merge branch 'release' of git://git.kernel.org/pub/scm/linux/kernel/git/lenb/linux-acpi-2.6 2010-10-26 17:28:37 -07:00
amba
ata ATA: pata_octeon_cf: Use I/O clock rate for timing calculations. 2010-10-29 19:08:41 +01:00
atm drivers/atm/eni.c: Remove multiple uses of KERN_<level> 2010-10-26 11:35:37 -07:00
auxdisplay
base Merge branch 'pm-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/suspend-2.6 2010-10-29 15:09:56 -07:00
block Merge branch 'stable/xen-pcifront-0.8.2' of git://git.kernel.org/pub/scm/linux/kernel/git/konrad/xen 2010-10-28 17:11:17 -07:00
bluetooth Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next-2.6 2010-10-23 11:47:02 -07:00
cdrom cdrom: gdrom: ctrl_in/outX to __raw_read/writeX conversion. 2010-10-27 14:33:39 +09:00
char audit: Call tty_audit_push_task() outside preempt disabled 2010-10-30 08:45:25 -04:00
clocksource
connector connector: remove lazy workqueue creation 2010-10-24 14:20:01 -07:00
cpufreq [CPUFREQ] add sampling_down_factor tunable to improve ondemand performance 2010-10-22 11:44:47 -04:00
cpuidle
crypto replace nested max/min macros with {max,min}3 macro 2010-10-26 16:52:12 -07:00
dca
dio
dma drivers/dma/Kconfig: add part number for Topcliff. 2010-10-29 14:14:02 -07:00
edac Merge branch 'linux_next' of git://git.kernel.org/pub/scm/linux/kernel/git/mchehab/i7core 2010-10-26 10:13:48 -07:00
eisa
firewire Merge branch 'ieee1394-removal' of git://git.kernel.org/pub/scm/linux/kernel/git/ieee1394/linux1394-2.6 2010-10-25 08:05:29 -07:00
firmware dmi: log board, system, and BIOS information 2010-10-27 18:03:05 -07:00
gpio gpio: Add VIA VX855 GPIO driver 2010-10-29 00:29:51 +02:00
gpu Merge branch 'drm-core-next' of git://git.kernel.org/pub/scm/linux/kernel/git/airlied/drm-2.6 2010-10-27 20:37:06 -07:00
hid Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/dtor/input 2010-10-25 07:59:01 -07:00
hwmon hwmon: (it87) Add support for the IT8721F/IT8758E 2010-10-28 20:31:51 +02:00
i2c Merge branch 'for-2637/i2c-all' of git://git.fluff.org/bjdooks/linux 2010-10-29 16:15:57 -07:00
ide ide: clean up timed out request handling 2010-10-26 10:17:30 -07:00
idle Merge branch 'idle-release' of git://git.kernel.org/pub/scm/linux/kernel/git/lenb/linux-idle-2.6 2010-10-26 17:28:07 -07:00
ieee802154
infiniband convert get_sb_single() users 2010-10-29 04:16:28 -04:00
input Merge branch 'stable/xen-pcifront-0.8.2' of git://git.kernel.org/pub/scm/linux/kernel/git/konrad/xen 2010-10-28 17:11:17 -07:00
isdn convert get_sb_single() users 2010-10-29 04:16:28 -04:00
leds leds: Remove auto blink in 88pm860x 2010-10-29 00:29:44 +02:00
lguest
macintosh Move ams driver to macintosh 2010-10-28 20:31:50 +02:00
mca
md md: tidy up device searches in read_balance. 2010-10-29 16:40:33 +11:00
media Merge branch 'v4l_for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mchehab/linux-2.6 2010-10-28 09:35:11 -07:00
memstick
message Merge git://git.kernel.org/pub/scm/linux/kernel/git/jejb/scsi-misc-2.6 2010-10-22 17:34:15 -07:00
mfd mfd: Fix a memory leak when unload mc13xxx-core module 2010-10-29 00:30:43 +02:00
misc Merge branch 'for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jwessel/linux-2.6-kgdb 2010-10-29 11:49:38 -07:00
mmc mfd: Adding twl6030 mmc card detect support for MMC1 2010-10-29 00:29:59 +02:00
mtd convert get_sb_pseudo() users 2010-10-29 04:16:33 -04:00
net Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-2.6 2010-10-29 14:17:12 -07:00
nubus
of of/mips: Cleanup some include directives/files. 2010-10-21 11:10:11 -06:00
oprofile convert get_sb_single() users 2010-10-29 04:16:28 -04:00
parisc Merge branch 'next' of git://git.kernel.org/pub/scm/linux/kernel/git/kyle/parisc-2.6 2010-10-28 09:24:14 -07:00
parport Merge branch 'for-next' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/trivial 2010-10-24 13:41:39 -07:00
pci Merge branch 'stable/xen-pcifront-0.8.2' of git://git.kernel.org/pub/scm/linux/kernel/git/konrad/xen 2010-10-28 17:11:17 -07:00
pcmcia Merge branch 'for-next' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/trivial 2010-10-24 13:41:39 -07:00
platform Remove duplicate includes from many files 2010-10-27 18:03:18 -07:00
pnp Merge branch 'release' of git://git.kernel.org/pub/scm/linux/kernel/git/lenb/linux-acpi-2.6 2010-10-26 17:28:37 -07:00
power power: Revert "power_supply: Mark twl4030_charger as broken" 2010-10-29 00:30:44 +02:00
pps
ps3
rapidio rapidio: fix destructive port EM initialization for Tsi568 2010-10-27 18:03:16 -07:00
regulator regulator: max8998 BUCK1/2 voltage change with use of GPIOs 2010-10-29 00:30:15 +02:00
rtc rtc: Add support for the rtc found in the MC13892 PMIC 2010-10-29 00:30:01 +02:00
s390 [S390] tape: fix dbf usage 2010-10-29 16:50:50 +02:00
sbus Merge branch 'next-devicetree' of git://git.secretlab.ca/git/linux-2.6 2010-10-25 08:19:14 -07:00
scsi Merge branch 'for-next' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/trivial 2010-10-24 13:41:39 -07:00
serial Merge branch 'omap-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tmlind/linux-omap-2.6 2010-10-25 13:46:56 -07:00
sfi
sh sh: intc: switch irq_desc iteration to new active IRQ iterator. 2010-10-28 11:36:31 +09:00
sn
spi Merge branch 'for-next' of git://android.git.kernel.org/kernel/tegra 2010-10-25 18:42:06 -07:00
ssb
staging Staging: dream: remove dream driver and arch from tree 2010-10-29 12:42:18 -07:00
tc
telephony Merge branch 'llseek' of git://git.kernel.org/pub/scm/linux/kernel/git/arnd/bkl 2010-10-22 10:52:56 -07:00
thermal
uio Merge branch 'for-next' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/trivial 2010-10-24 13:41:39 -07:00
usb Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-2.6 2010-10-29 14:17:12 -07:00
uwb uwb: Remove the WLP subsystem and drivers 2010-10-25 14:03:45 +01:00
vhost Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next-2.6 2010-10-23 11:47:02 -07:00
video Merge branches 'msm-fixes' and 'msm-video' of git://codeaurora.org/quic/kernel/dwalker/linux-msm 2010-10-29 18:57:04 -07:00
virtio
vlynq
w1 w1: don't allow arbitrary users to remove w1 devices 2010-10-27 18:03:17 -07:00
watchdog WATCHDOG: octeon-wdt: Use I/O clock rate for timing calculations. 2010-10-29 19:08:42 +01:00
xen convert get_sb_single() users 2010-10-29 04:16:28 -04:00
zorro zorro: Fix device_register() error handling 2010-10-22 09:43:25 +02:00
Kconfig
Makefile Merge branch 'ieee1394-removal' of git://git.kernel.org/pub/scm/linux/kernel/git/ieee1394/linux1394-2.6 2010-10-25 08:05:29 -07:00