[tip: perf/core] libperf evlist: Fix a refcount leak

[tip-bot2 for Ian Rogers]

The following commit has been merged into the perf/core branch of tip:

Commit-ID:     4599d292128d89e4cf866a0ea9a9b047a2de8418
Gitweb:        https://git.kernel.org/tip/4599d292128d89e4cf866a0ea9a9b047a2de8418
Author:        Ian Rogers <irogers@xxxxxxxxxx>
AuthorDate:    Wed, 18 Mar 2020 19:31:01 -07:00
Committer:     Arnaldo Carvalho de Melo <acme@xxxxxxxxxx>
CommitterDate: Tue, 05 May 2020 16:35:29 -03:00

libperf evlist: Fix a refcount leak

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 c481b62..6a875a0 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;