[PATCH] perf: fix for double free in tools/perf stat

[Yasser Shalabi]

Fix for double free bug in tools/perf due to dangling thread_map pointer in perf_evlist struct.
Code path excercised when perf stat -C switch is used but not set and is followed by another switch.
Example: perf stat -C -e. 
Signed-off-by: Yasser Shalabi <yassershalabi@xxxxxxxxx>

---
 tools/perf/util/evlist.c |    1 +
 1 file changed, 1 insertion(+)

diff --git a/tools/perf/util/evlist.c b/tools/perf/util/evlist.c
index 814e954..09af633 100644
--- a/tools/perf/util/evlist.c
+++ b/tools/perf/util/evlist.c
@@ -845,6 +845,7 @@ int perf_evlist__create_maps(struct perf_evlist *evlist, struct target *target)
 
 out_delete_threads:
 	thread_map__delete(evlist->threads);
+	evlist->threads = 0;
 	return -1;
 }
 
-- 
1.7.10.4

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