diff options
| author | Peter Zijlstra <peterz@infradead.org> | 2016-02-24 18:45:41 +0100 |
|---|---|---|
| committer | Mister Oyster <oysterized@gmail.com> | 2017-04-11 11:00:05 +0200 |
| commit | 99ebc8c3bede92aeb02cee4a48469f1e585857e7 (patch) | |
| tree | 3424cfa2f563ef5941e385e67298e8ae66fae3d2 /kernel/events/core.c | |
| parent | 1240bc2234727c3221e4ab492906782947ecbeb8 (diff) | |
perf: Do not double free
In case of: err_file: fput(event_file), we'll end up calling
perf_release() which in turn will free the event.
Do not then free the event _again_.
Change-Id: Ic1de33d0e29e577a1fc2e00c35bf44df26d96ab6
Tested-by: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Reviewed-by: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Arnaldo Carvalho de Melo <acme@redhat.com>
Cc: Jiri Olsa <jolsa@redhat.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: dvyukov@google.com
Cc: eranian@google.com
Cc: oleg@redhat.com
Cc: panand@redhat.com
Cc: sasha.levin@oracle.com
Cc: vince@deater.net
Link: http://lkml.kernel.org/r/20160224174947.697350349@infradead.org
Signed-off-by: Ingo Molnar <mingo@kernel.org>
[bwh: Backported to 3.2: adjust context]
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
Diffstat (limited to 'kernel/events/core.c')
| -rw-r--r-- | kernel/events/core.c | 7 |
1 files changed, 6 insertions, 1 deletions
diff --git a/kernel/events/core.c b/kernel/events/core.c index 8a5815d26..1a443f743 100644 --- a/kernel/events/core.c +++ b/kernel/events/core.c @@ -7197,7 +7197,12 @@ err_context: perf_unpin_context(ctx); put_ctx(ctx); err_alloc: - free_event(event); + /* + * If event_file is set, the fput() above will have called ->release() + * and that will take care of freeing the event. + */ + if (!event_file) + free_event(event); err_task: put_online_cpus(); if (task) |