[PATCH 36/91] libperf evlist: Fix a refcount leak

[Arnaldo Carvalho de Melo]

From: Ian Rogers <irogers@xxxxxxxxxx>

Memory leaks found by applying LLVM's libfuzzer on the tools/perf
parse_events function.

Signed-off-by: Ian Rogers <irogers@xxxxxxxxxx>
Cc: Adrian Hunter <adrian.hunter@xxxxxxxxx>
Cc: Alexander Shishkin <alexander.shishkin@xxxxxxxxxxxxxxx>
Cc: Andi Kleen <ak@xxxxxxxxxxxxxxx>
Cc: Jiri Olsa <jolsa@xxxxxxxxxx>
Cc: Leo Yan <leo.yan@xxxxxxxxxx>
Cc: Mark Rutland <mark.rutland@xxxxxxx>
Cc: Namhyung Kim <namhyung@xxxxxxxxxx>
Cc: Peter Zijlstra <peterz@xxxxxxxxxxxxx>
Cc: Stephane Eranian <eranian@xxxxxxxxxx>
Cc: clang-built-linux@xxxxxxxxxxxxxxxx
Link: http://lore.kernel.org/lkml/20200319023101.82458-2-irogers@xxxxxxxxxx
[ Did a minor adjustment due to some other previous patch having already set evlist->all_cpus to NULL at perf_evlist__exit() ]
Signed-off-by: Arnaldo Carvalho de Melo <acme@xxxxxxxxxx>
---
 tools/lib/perf/evlist.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/tools/lib/perf/evlist.c b/tools/lib/perf/evlist.c
index c481b62f2ce4..6a875a0f01bb 100644
--- a/tools/lib/perf/evlist.c
+++ b/tools/lib/perf/evlist.c
@@ -123,6 +123,7 @@ static void perf_evlist__purge(struct perf_evlist *evlist)
 void perf_evlist__exit(struct perf_evlist *evlist)
 {
 	perf_cpu_map__put(evlist->cpus);
+	perf_cpu_map__put(evlist->all_cpus);
 	perf_thread_map__put(evlist->threads);
 	evlist->cpus = NULL;
 	evlist->all_cpus = NULL;
-- 
2.21.1