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authorSanskriti Sharma <sansharm@redhat.com>2018-10-02 10:29:13 -0400
committerArnaldo Carvalho de Melo <acme@redhat.com>2018-10-08 14:23:46 -0300
commit470c8f7c88de013d266e1b61044efe8937728b7f (patch)
tree2024fe6a048c02880d7b7eb058698ae202f22d7a /tools
parent9c8a182e5a73e01afd11742a2ab887bf338fdafd (diff)
perf tools: Avoid double free in read_event_file()
The temporary 'buf' buffer allocated in read_event_file() may be freed twice. Move the free() call to the common function exit point. Fixes the following coverity complaints: Error: USE_AFTER_FREE (CWE-825): tools/perf/util/trace-event-read.c:309: double_free: Calling "free" frees pointer "buf" which has already been freed. Signed-off-by: Sanskriti Sharma <sansharm@redhat.com> Reviewed-by: Jiri Olsa <jolsa@kernel.org> Cc: Joe Lawrence <joe.lawrence@redhat.com> Link: http://lkml.kernel.org/r/1538490554-8161-5-git-send-email-sansharm@redhat.com Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Diffstat (limited to 'tools')
-rw-r--r--tools/perf/util/trace-event-read.c4
1 files changed, 1 insertions, 3 deletions
diff --git a/tools/perf/util/trace-event-read.c b/tools/perf/util/trace-event-read.c
index b98ee2a2eb44..a278e1eee5f5 100644
--- a/tools/perf/util/trace-event-read.c
+++ b/tools/perf/util/trace-event-read.c
@@ -297,10 +297,8 @@ static int read_event_file(struct tep_handle *pevent, char *sys,
}
ret = do_read(buf, size);
- if (ret < 0) {
- free(buf);
+ if (ret < 0)
goto out;
- }
ret = parse_event_file(pevent, buf, size, sys);
if (ret < 0)

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