Oleg Nesterov ad133ba3dc sched, signals: fix the racy usage of ->signal in account_group_xxx/run_posix_cpu_timers ...

Impact: fix potential NULL dereference

Contrary to ad474caca3 changelog, other
acct_group_xxx() helpers can be called after exit_notify() by timer tick.
Thanks to Roland for pointing out this. Somehow I missed this simple fact
when I read the original patch, and I am afraid I confused Frank during
the discussion. Sorry.

Fortunately, these helpers work with current, we can check ->exit_state
to ensure that ->signal can't go away under us.

Also, add the comment and compiler barrier to account_group_exec_runtime(),
to make sure we load ->signal only once.

Signed-off-by: Oleg Nesterov <oleg@redhat.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>

2008-11-17 16:49:35 +01:00

..

irq

irq: make variable static

2008-10-22 07:37:17 +02:00

power

PM_TEST_SUSPEND should depend on RTC_CLASS, not RTC_LIB

2008-11-01 12:40:38 -07:00

time

nohz: disable tick_nohz_kick_tick() for now

2008-11-10 22:39:27 +01:00

trace

Merge branch 'devel' of git://git.kernel.org/pub/scm/linux/kernel/git/rostedt/linux-2.6-trace into tracing/urgent

2008-11-11 09:16:20 +01:00

.gitignore

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acct.c

tty: Fix abusers of current->sighand->tty

2008-10-13 09:51:42 -07:00

audit_tree.c

[PATCH] get rid of nameidata in audit_tree

2008-10-23 05:12:53 -04:00

audit.c

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audit.h

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auditfilter.c

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auditsc.c

tty: Fix abusers of current->sighand->tty

2008-10-13 09:51:42 -07:00

backtracetest.c

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bounds.c

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capability.c

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cgroup_debug.c

cgroups: fix probable race with put_css_set[_taskexit] and find_css_set

2008-10-20 08:52:38 -07:00

cgroup_freezer.c

freezer_cg: disable writing freezer.state of root cgroup

2008-11-12 17:17:16 -08:00

cgroup.c

cgroups: fix invalid cgrp->dentry before cgroup has been completely removed

2008-11-06 15:41:19 -08:00

compat.c

Merge branches 'timers/clocksource', 'timers/hrtimers', 'timers/nohz', 'timers/ntp', 'timers/posixtimers' and 'timers/debug' into v28-timers-for-linus

2008-10-20 13:14:06 +02:00

configs.c

kernel/configs.c: remove useless comments

2008-10-20 08:52:34 -07:00

cpu.c

cpumask: introduce new API, without changing anything

2008-11-06 09:05:33 +01:00

cpuset.c

cpuset: use seq_*mask_* to print masks

2008-10-20 08:52:39 -07:00

delayacct.c

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dma-coherent.c

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dma.c

kernel/dma.c: remove a CVS keyword

2008-10-16 11:21:30 -07:00

exec_domain.c

proc: move /proc/execdomains to kernel/exec_domain.c

2008-10-23 14:30:41 +04:00

exit.c

fix for account_group_exec_runtime(), make sure ->signal can't be freed under rq->lock

2008-11-11 08:01:43 +01:00

extable.c

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fork.c

Merge branch 'timers/range-hrtimers' into v28-range-hrtimers-for-linus-v2

2008-10-22 09:48:06 +02:00

freezer.c

freezer_cg: use thaw_process() in unfreeze_cgroup()

2008-10-30 11:38:45 -07:00

futex_compat.c

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futex.c

hrtimer: make the futex() system call use the per process slack value

2008-09-11 07:17:00 -07:00

hrtimer.c

hrtimer: clean up unused callback modes

2008-11-12 09:54:40 +01:00

itimer.c

timers: fix itimer/many thread hang

2008-09-14 16:25:35 +02:00

kallsyms.c

kernel/kallsyms.c: fix double return

2008-10-16 11:21:32 -07:00

Kconfig.freezer

container freezer: implement freezer cgroup subsystem

2008-10-20 08:52:34 -07:00

Kconfig.hz

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Kconfig.preempt

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kexec.c

kexec: fix crash_save_vmcoreinfo_init build problem

2008-10-20 15:28:50 -07:00

kfifo.c

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kgdb.c

kgdb: call touch_softlockup_watchdog on resume

2008-10-06 13:50:59 -05:00

kmod.c

Merge git://git.kernel.org/pub/scm/linux/kernel/git/rusty/linux-2.6-for-linus

2008-10-16 12:38:34 -07:00

kprobes.c

kernel/kprobes.c: don't pad kretprobe_table_locks[] on uniprocessor builds

2008-11-12 17:17:17 -08:00

ksysfs.c

profiling: dynamically enable readprofile at runtime

2008-10-16 11:21:31 -07:00

kthread.c

Merge branch 'tracing-v28-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip

2008-10-20 13:35:07 -07:00

latencytop.c

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lockdep_internals.h

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lockdep_proc.c

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lockdep.c

lockdep: fix irqs on/off ip tracing

2008-10-28 11:19:07 +01:00

Makefile

Merge branch 'tracing/ftrace' into tracing/urgent

2008-10-22 09:08:14 +02:00

marker.c

markers: bit-field is not thread-safe nor smp-safe

2008-10-14 10:38:45 +02:00

module.c

Merge branch 'proc' of git://git.kernel.org/pub/scm/linux/kernel/git/adobriyan/proc

2008-10-23 12:04:37 -07:00

mutex-debug.c

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mutex-debug.h

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mutex.c

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mutex.h

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notifier.c

ftrace: ignore functions that cannot be kprobe-ed

2008-10-14 10:34:22 +02:00

ns_cgroup.c

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nsproxy.c

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panic.c

Make panic= and panic_on_oops into core_params

2008-10-22 10:00:25 +11:00

params.c

Fix compile warning in kernel/params.c

2008-10-23 12:09:00 -07:00

pid_namespace.c

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pid.c

…

pm_qos_params.c

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posix-cpu-timers.c

sched, signals: fix the racy usage of ->signal in account_group_xxx/run_posix_cpu_timers

2008-11-17 16:49:35 +01:00

posix-timers.c

Merge branch 'timers/range-hrtimers' into v28-range-hrtimers-for-linus-v2

2008-10-22 09:48:06 +02:00

printk.c

printk: remove unused code from kernel/printk.c

2008-10-23 21:54:29 +02:00

profile.c

kernel/profile: fix profile_init() section mismatch

2008-10-30 11:38:46 -07:00

ptrace.c

make ptrace_untrace() static

2008-10-20 08:52:39 -07:00

rcuclassic.c

rcu: RCU-based detection of stalled CPUs for Classic RCU, fix

2008-10-03 10:41:00 +02:00

rcupdate.c

rcupdate: fix bug of rcu_barrier*()

2008-10-21 15:59:53 +02:00

rcupreempt_trace.c

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rcupreempt.c

byteorder: remove direct includes of linux/byteorder/swab[b].h

2008-10-20 08:52:40 -07:00

rcutorture.c

byteorder: remove direct includes of linux/byteorder/swab[b].h

2008-10-20 12:51:53 -07:00

relay.c

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res_counter.c

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resource.c

reserve_region_with_split: Fix GFP_KERNEL usage under spinlock

2008-11-01 09:53:58 -07:00

rtmutex_common.h

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rtmutex-debug.c

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rtmutex-debug.h

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rtmutex-tester.c

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rtmutex.c

hrtimer: convert kernel/* to the new hrtimer apis

2008-09-05 21:35:13 -07:00

rtmutex.h

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rwsem.c

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sched_clock.c

sched_clock: prevent scd->clock from moving backwards

2008-10-10 11:17:04 +02:00

sched_cpupri.c

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sched_cpupri.h

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sched_debug.c

sched: fix kernel warning on /proc/sched_debug access

2008-11-16 08:07:15 +01:00

sched_fair.c

sched: release buddies on yield

2008-11-11 11:57:22 +01:00

sched_features.h

sched: backward looking buddy

2008-11-05 10:30:14 +01:00

sched_idletask.c

sched: add CONFIG_SMP consistency

2008-10-22 10:01:52 +02:00

sched_rt.c

Merge commit 'v2.6.28-rc1' into sched/urgent

2008-10-24 12:48:46 +02:00

sched_stats.h

sched, signals: fix the racy usage of ->signal in account_group_xxx/run_posix_cpu_timers

2008-11-17 16:49:35 +01:00

sched.c

sched: fix init_idle()'s use of sched_clock()

2008-11-12 20:05:50 +01:00

seccomp.c

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semaphore.c

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signal.c

'kill sig -1' must only apply to caller's namespace

2008-10-30 11:38:46 -07:00

smp.c

generic-ipi: fix the smp_mb() placement

2008-11-06 08:41:56 +01:00

softirq.c

irq: call __irq_enter() before calling the tick_idle_check

2008-11-10 22:36:39 +01:00

softlockup.c

Make the taint flags reliable

2008-10-16 11:21:31 -07:00

spinlock.c

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srcu.c

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stacktrace.c

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stop_machine.c

Revert "Call init_workqueues before pre smp initcalls."

2008-10-25 19:53:38 -07:00

sys_ni.c

Configure out AIO support

2008-10-16 11:21:51 -07:00

sys.c

Merge branch 'timers/range-hrtimers' into v28-range-hrtimers-for-linus-v2

2008-10-22 09:48:06 +02:00

sysctl_check.c

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sysctl.c

Merge commit 'v2.6.28-rc2' into tracing/urgent

2008-10-27 10:50:54 +01:00

taskstats.c

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test_kprobes.c

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time.c

select: add a timespec_add_safe() function

2008-09-05 21:34:57 -07:00

timeconst.pl

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timer.c

Add round_jiffies_up and related routines

2008-11-06 08:42:48 +01:00

tracepoint.c

tracepoint: check if the probe has been registered

2008-10-27 16:45:46 +01:00

tsacct.c

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uid16.c

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user_namespace.c

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user.c

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utsname_sysctl.c

sysctl: simplify ->strategy

2008-10-16 11:21:47 -07:00

utsname.c

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wait.c

wait: kill is_sync_wait()

2008-10-16 11:21:31 -07:00

workqueue.c

cpumask: introduce new API, without changing anything

2008-11-06 09:05:33 +01:00