From: Namhyung Kim <namhyung.kim@lge.com>
Date: Tue, 14 Aug 2012 01:57:03 +0000 (+0900)
Subject: perf script: Fix a NULL pointer dereference
X-Git-Tag: v3.8-rc1~60^2~73^2~23
X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=d0d3913895e5b50623bd4dafd876e41c1169031d;p=platform%2Fupstream%2Fkernel-adaptation-pc.git

perf script: Fix a NULL pointer dereference

If 'perf script --gen-script' was called with a perf.data which contains
no tracepoint event, it'd segfault due to NULL pevent pointer. Fix it.

Signed-off-by: Namhyung Kim <namhyung@kernel.org>
Cc: Feng Tang <feng.tang@intel.com>
Cc: Ingo Molnar <mingo@kernel.org>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Link: http://lkml.kernel.org/r/1344909423-26384-1-git-send-email-namhyung@kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
---

diff --git a/tools/perf/util/trace-event-parse.c b/tools/perf/util/trace-event-parse.c
index 4cb7f38..a5a554e 100644
--- a/tools/perf/util/trace-event-parse.c
+++ b/tools/perf/util/trace-event-parse.c
@@ -293,7 +293,7 @@ struct event_format *trace_find_next_event(struct pevent *pevent,
 {
 	static int idx;
 
-	if (!pevent->events)
+	if (!pevent || !pevent->events)
 		return NULL;
 
 	if (!event) {