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perf: Fix task_struct reference leak 

sys_perf_event_open() had an imbalance in the number of task refs it
took causing memory leakage

Cc: Jiri Olsa <jolsa@redhat.com>
Cc: Oleg Nesterov <oleg@redhat.com>
Cc: stable@kernel.org # .37+
Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl>
LKML-Reference: <new-submission>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
This commit is contained in:
Peter Zijlstra 2011-03-28 13:13:56 +02:00 committed by Ingo Molnar
parent ab711fe082
commit fd1edb3aa2
1 changed files with 5 additions and 0 deletions
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5
kernel/perf_event.c
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@ -6531,6 +6531,11 @@ SYSCALL_DEFINE5(perf_event_open,
goto err_alloc; goto err_alloc;
} }
if (task) {
put_task_struct(task);
task = NULL;
}
/* /*
* Look up the group leader (we will attach this event to it): * Look up the group leader (we will attach this event to it):
*/ */