[PATCH AUTOSEL 5.4 186/330] perf parse-events: Fix 3 use after frees found with clang ASAN

[Sasha Levin]

From: Ian Rogers <irogers@xxxxxxxxxx>

[ Upstream commit d4953f7ef1a2e87ef732823af35361404d13fea8 ]

Reproducible with a clang asan build and then running perf test in
particular 'Parse event definition strings'.

Signed-off-by: Ian Rogers <irogers@xxxxxxxxxx>
Acked-by: Jiri Olsa <jolsa@xxxxxxxxxx>
Cc: Adrian Hunter <adrian.hunter@xxxxxxxxx>
Cc: Alexander Shishkin <alexander.shishkin@xxxxxxxxxxxxxxx>
Cc: Andi Kleen <ak@xxxxxxxxxxxxxxx>
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/20200314170356.62914-1-irogers@xxxxxxxxxx
Signed-off-by: Arnaldo Carvalho de Melo <acme@xxxxxxxxxx>
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
---
 tools/perf/util/evsel.c        | 1 +
 tools/perf/util/parse-events.c | 4 ++--
 2 files changed, 3 insertions(+), 2 deletions(-)

diff --git a/tools/perf/util/evsel.c b/tools/perf/util/evsel.c
index a844715a352d8..dfc982baecab4 100644
--- a/tools/perf/util/evsel.c
+++ b/tools/perf/util/evsel.c
@@ -1254,6 +1254,7 @@ void perf_evsel__exit(struct evsel *evsel)
 	perf_thread_map__put(evsel->core.threads);
 	zfree(&evsel->group_name);
 	zfree(&evsel->name);
+	zfree(&evsel->pmu_name);
 	perf_evsel__object.fini(evsel);
 }
 
diff --git a/tools/perf/util/parse-events.c b/tools/perf/util/parse-events.c
index 422ad1888e74f..2a97a5e3aa91e 100644
--- a/tools/perf/util/parse-events.c
+++ b/tools/perf/util/parse-events.c
@@ -1344,7 +1344,7 @@ int parse_events_add_pmu(struct parse_events_state *parse_state,
 		evsel = __add_event(list, &parse_state->idx, &attr, NULL, pmu, NULL,
 				    auto_merge_stats, NULL);
 		if (evsel) {
-			evsel->pmu_name = name;
+			evsel->pmu_name = name ? strdup(name) : NULL;
 			evsel->use_uncore_alias = use_uncore_alias;
 			return 0;
 		} else {
@@ -1385,7 +1385,7 @@ int parse_events_add_pmu(struct parse_events_state *parse_state,
 		evsel->snapshot = info.snapshot;
 		evsel->metric_expr = info.metric_expr;
 		evsel->metric_name = info.metric_name;
-		evsel->pmu_name = name;
+		evsel->pmu_name = name ? strdup(name) : NULL;
 		evsel->use_uncore_alias = use_uncore_alias;
 		evsel->percore = config_term_percore(&evsel->config_terms);
 	}
-- 
2.25.1