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sched: Add missing rcu_dereference() around ->real_parent usage

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Wrap another ->real_parent dereference while under rcu_read_lock.

Signed-off-by: Kees Cook <keescook@chromium.org>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Glauber Costa <glommer@parallels.com>
Cc: Suresh Siddha <suresh.b.siddha@intel.com>
Cc: KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com>
Link: http://lkml.kernel.org/r/20111215164918.GA13003@www.outflux.net
[ tidied up the changelog ]
Signed-off-by: Ingo Molnar <mingo@elte.hu>
This commit is contained in:
Kees Cook 2011-12-15 08:49:18 -08:00 committed by Ingo Molnar
parent abd63bc3a0
commit 07cde2608a
1 changed files with 1 additions and 1 deletions
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2
kernel/sched/core.c
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@ -4784,7 +4784,7 @@ void sched_show_task(struct task_struct *p)
free = stack_not_used(p); free = stack_not_used(p);
#endif #endif
printk(KERN_CONT "%5lu %5d %6d 0x%08lx\n", free, printk(KERN_CONT "%5lu %5d %6d 0x%08lx\n", free,
task_pid_nr(p), task_pid_nr(p->real_parent), task_pid_nr(p), task_pid_nr(rcu_dereference(p->real_parent)),
(unsigned long)task_thread_info(p)->flags); (unsigned long)task_thread_info(p)->flags);
show_stack(p, NULL); show_stack(p, NULL);