[tip:perf/core] perf tools: Add missing check for failure in a zalloc() call

[tip-bot for Taeung Song <tipbot@zytor.com>]

Commit-ID:  5aa365f29867eb739cde0713f00c7d80f36e0739
Gitweb:     http://git.kernel.org/tip/5aa365f29867eb739cde0713f00c7d80f36e0739
Author:     Taeung Song <treeze.taeung@gmail.com>
AuthorDate: Wed, 1 Feb 2017 21:34:05 +0900
Committer:  Arnaldo Carvalho de Melo <acme@redhat.com>
CommitDate: Wed, 8 Feb 2017 09:41:11 -0300

perf tools: Add missing check for failure in a zalloc() call

Signed-off-by: Taeung Song <treeze.taeung@gmail.com>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Wang Nan <wangnan0@huawei.com>
Link: http://lkml.kernel.org/r/1485952447-7013-3-git-send-email-treeze.taeung@gmail.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
---
 tools/perf/util/parse-events.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/tools/perf/util/parse-events.c b/tools/perf/util/parse-events.c
index 2720600..1f1f77d 100644
--- a/tools/perf/util/parse-events.c
+++ b/tools/perf/util/parse-events.c
@@ -211,6 +211,8 @@ struct tracepoint_path *tracepoint_id_to_path(u64 config)
 				closedir(evt_dir);
 				closedir(sys_dir);
 				path = zalloc(sizeof(*path));
+				if (!path)
+					return NULL;
 				path->system = malloc(MAX_EVENT_LENGTH);
 				if (!path->system) {
 					free(path);