Use find_task_by_vpid in posix timers

All the functions that need to lookup a task by pid in posix timers obtain
this pid from a user space, and thus this value refers to a task in the same
namespace, as the current task lives in.

So the proper behavior is to call find_task_by_vpid() here.

Signed-off-by: Pavel Emelyanov <xemul@openvz.org>
Cc: "Eric W. Biederman" <ebiederm@xmission.com>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

1 files changed, 1 insertions, 1 deletions

diff --git a/kernel/posix-timers.c b/kernel/posix-timers.c
index 122d5c787fe2..ce268966007d 100644
--- a/kernel/posix-timers.c
+++ b/kernel/posix-timers.c
@@ -404,7 +404,7 @@ static struct task_struct * good_sigevent(sigevent_t * event)
         struct task_struct *rtn = current->group_leader;
 
         if ((event->sigev_notify & SIGEV_THREAD_ID ) &&
-                (!(rtn = find_task_by_pid(event->sigev_notify_thread_id)) ||
+                (!(rtn = find_task_by_vpid(event->sigev_notify_thread_id)) ||
                  !same_thread_group(rtn, current) ||
                  (event->sigev_notify & ~SIGEV_THREAD_ID) != SIGEV_SIGNAL))
                 return NULL;