Gerald Schaefer ccdb5fa37f sched/autogroup: Fix race with task_groups list ...

commit 41261b6a83 upstream.

In autogroup_create(), a tg is allocated and added to the task_groups
list. If CONFIG_RT_GROUP_SCHED is set, this tg is then modified while on
the list, without locking. This can race with someone walking the list,
like __enable_runtime() during CPU unplug, and result in a use-after-free
bug.

To fix this, move sched_online_group(), which adds the tg to the list,
to the end of the autogroup_create() function after the modification.

Signed-off-by: Gerald Schaefer <gerald.schaefer@de.ibm.com>
Signed-off-by: Peter Zijlstra <peterz@infradead.org>
Link: http://lkml.kernel.org/r/1369411669-46971-2-git-send-email-gerald.schaefer@de.ibm.com
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Signed-off-by: Preeti U Murthy <preeti@linux.vnet.ibm.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

2014-03-31 09:58:14 -07:00

..

auto_group.c

sched/autogroup: Fix race with task_groups list

2014-03-31 09:58:14 -07:00

auto_group.h

Revert "sched/autogroup: Fix crash on reboot when autogroup is disabled"

2012-12-11 10:23:45 +01:00

clock.c

sched_clock: Prevent 64bit inatomicity on 32bit systems

2013-04-08 11:50:44 +02:00

core.c

sched: Fix race on toggling cfs_bandwidth_used

2014-01-15 15:28:54 -08:00

cpuacct.c

sched/cpuacct/UML: Fix header file dependency bug on the UML build

2013-04-10 15:12:41 +02:00

cpuacct.h

sched/cpuacct: Initialize root cpuacct earlier

2013-04-10 13:54:20 +02:00

cpupri.c

sched/rt: Move rt specific bits into new header file

2013-02-07 20:51:08 +01:00

cpupri.h

…

cputime.c

sched/cputime: Do not scale when utime == 0

2013-10-01 09:17:45 -07:00

debug.c

sched: Avoid throttle_cfs_rq() racing with period_timer stopping

2013-12-20 07:45:11 -08:00

fair.c

sched: Fix double normalization of vruntime

2014-03-23 21:38:09 -07:00

features.h

mutex: Move mutex spinning code from sched/core.c back to mutex.c

2013-04-19 09:33:34 +02:00

idle_task.c

sched: Keep at least 1 tick per second for active dynticks tasks

2013-05-04 08:32:02 +02:00

Makefile

sched: Split cpuacct code out of core.c

2013-04-10 13:54:15 +02:00

rt.c

sched/rt: Fix rq's cpupri leak while enqueue/dequeue child RT entities

2014-01-09 12:24:21 -08:00

sched.h

sched: Fix race on toggling cfs_bandwidth_used

2014-01-15 15:28:54 -08:00

stats.c

fix a leak in /proc/schedstats

2013-04-29 15:41:45 -04:00

stats.h

…

stop_task.c

sched: Fix migration thread runtime bogosity

2012-08-13 18:41:55 +02:00