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Commit 07cde260 authored by Kees Cook's avatar Kees Cook Committed by Ingo Molnar
Browse files

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



Wrap another ->real_parent dereference while under rcu_read_lock.

Signed-off-by: default avatarKees 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: default avatarIngo Molnar <mingo@elte.hu>
parent abd63bc3

kernel/sched/core.c

+1 −1
Original line number Diff line number Diff line
@@ -4784,7 +4784,7 @@ void sched_show_task(struct task_struct *p) 
	free = stack_not_used(p);

#endif

	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);



	show_stack(p, NULL);