linux-kernel - [PATCH V8 4/7] perf,tools: fix dump

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Date:	Thu,  3 Sep 2015 08:31:00 -0400
From:	kan.liang@...el.com
To:	acme@...nel.org, jolsa@...nel.org
Cc:	a.p.zijlstra@...llo.nl, luto@...nel.org, mingo@...hat.com,
	eranian@...gle.com, ak@...ux.intel.com, mark.rutland@....com,
	adrian.hunter@...el.com, namhyung@...nel.org,
	linux-kernel@...r.kernel.org, Kan Liang <kan.liang@...el.com>
Subject: [PATCH V8 4/7] perf,tools: fix dump_sample crash when evsel is NULL.

From: Kan Liang <kan.liang@...el.com>

Need to check evsel before using in dump_sample.

Signed-off-by: Kan Liang <kan.liang@...el.com>
---
 tools/perf/util/session.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/tools/perf/util/session.c b/tools/perf/util/session.c
index 61669be..23fed17 100644
--- a/tools/perf/util/session.c
+++ b/tools/perf/util/session.c
@@ -1080,11 +1080,11 @@ static int machines__deliver_event(struct machines *machines,
 
 	switch (event->header.type) {
 	case PERF_RECORD_SAMPLE:
-		dump_sample(evsel, event, sample);
 		if (evsel == NULL) {
 			++evlist->stats.nr_unknown_id;
 			return 0;
 		}
+		dump_sample(evsel, event, sample);
 		if (machine == NULL) {
 			++evlist->stats.nr_unprocessable_samples;
 			return 0;
-- 
1.8.3.1

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