diff options
| author | Kishor PK <kpbhat@codeaurora.org> | 2016-01-29 11:13:25 +0530 |
|---|---|---|
| committer | Kyle Yan <kyan@codeaurora.org> | 2016-05-25 14:21:54 -0700 |
| commit | 05bd41f94eab0fbeb53864cb17541b55885fe496 (patch) | |
| tree | 97cc577615c36147b5d4444077e76f9d61c074d8 | |
| parent | 231003b1376550b38d47d0531d8782df38f75ad0 (diff) | |
trace: prevent NULL pointer dereference
Prevent unintended NULL pointer dereference in trace_event_perf.
Change-Id: I35151c460b4350ebd414b67c655684c2019f799f
Signed-off-by: Kishor PK <kpbhat@codeaurora.org>
Signed-off-by: Srinivasarao P <spathi@codeaurora.org>
Signed-off-by: Charan Teja Reddy <charante@codeaurora.org>
| -rw-r--r-- | kernel/trace/trace_event_perf.c | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/kernel/trace/trace_event_perf.c b/kernel/trace/trace_event_perf.c index cc9f7a9319be..731f6484b811 100644 --- a/kernel/trace/trace_event_perf.c +++ b/kernel/trace/trace_event_perf.c @@ -256,7 +256,8 @@ int perf_trace_add(struct perf_event *p_event, int flags) void perf_trace_del(struct perf_event *p_event, int flags) { struct trace_event_call *tp_event = p_event->tp_event; - hlist_del_rcu(&p_event->hlist_entry); + if (!hlist_unhashed(&p_event->hlist_entry)) + hlist_del_rcu(&p_event->hlist_entry); tp_event->class->reg(tp_event, TRACE_REG_PERF_DEL, p_event); } |