perf: Fix context leak in put_event()
authorLeon Yu <chianglungyu@gmail.com>
Thu, 26 Feb 2015 12:43:33 +0000 (20:43 +0800)
committerIngo Molnar <mingo@kernel.org>
Fri, 13 Mar 2015 09:02:18 +0000 (10:02 +0100)
commitd415a7f1c1a8406b22d95b943c66a5b73a37bc19
treee066cf93995f37e9a759d38bcb4a2741d27670fd
parente678fefa07f63c8f757d61b621fd1e5569cd63be
perf: Fix context leak in put_event()

Commit:

  a83fe28e2e45 ("perf: Fix put_event() ctx lock")

changed the locking logic in put_event() by replacing mutex_lock_nested()
with perf_event_ctx_lock_nested(), but didn't fix the subsequent
mutex_unlock() with a correct counterpart, perf_event_ctx_unlock().

Contexts are thus leaked as a result of incremented refcount
in perf_event_ctx_lock_nested().

Signed-off-by: Leon Yu <chianglungyu@gmail.com>
Cc: Arnaldo Carvalho de Melo <acme@kernel.org>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Fixes: a83fe28e2e45 ("perf: Fix put_event() ctx lock")
Link: http://lkml.kernel.org/r/1424954613-5034-1-git-send-email-chianglungyu@gmail.com
Signed-off-by: Ingo Molnar <mingo@kernel.org>
kernel/events/core.c