diff mbox series

[4.19,120/245] perf parse-events: Fix 3 use after frees found with clang ASAN

Message ID 20200929105952.826827610@linuxfoundation.org
State New
Headers show
Series None | expand

Commit Message

Greg Kroah-Hartman Sept. 29, 2020, 10:59 a.m. UTC 
From: Ian Rogers <irogers@google.com>

[ 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@google.com>
Acked-by: Jiri Olsa <jolsa@redhat.com>
Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Andi Kleen <ak@linux.intel.com>
Cc: Leo Yan <leo.yan@linaro.org>
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Stephane Eranian <eranian@google.com>
Cc: clang-built-linux@googlegroups.com
Link: http://lore.kernel.org/lkml/20200314170356.62914-1-irogers@google.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
 tools/perf/util/evsel.c        | 1 +
 tools/perf/util/parse-events.c | 4 ++--
 2 files changed, 3 insertions(+), 2 deletions(-)
diff mbox series

Patch

diff --git a/tools/perf/util/evsel.c b/tools/perf/util/evsel.c
index 4fad92213609f..68c5ab0e1800b 100644
--- a/tools/perf/util/evsel.c
+++ b/tools/perf/util/evsel.c
@@ -1290,6 +1290,7 @@  void perf_evsel__exit(struct perf_evsel *evsel)
 	thread_map__put(evsel->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 95043cae57740..6d087d9acd5ee 100644
--- a/tools/perf/util/parse-events.c
+++ b/tools/perf/util/parse-events.c
@@ -1261,7 +1261,7 @@  int parse_events_add_pmu(struct parse_events_state *parse_state,
 		attr.type = pmu->type;
 		evsel = __add_event(list, &parse_state->idx, &attr, NULL, pmu, NULL, auto_merge_stats);
 		if (evsel) {
-			evsel->pmu_name = name;
+			evsel->pmu_name = name ? strdup(name) : NULL;
 			evsel->use_uncore_alias = use_uncore_alias;
 			return 0;
 		} else {
@@ -1302,7 +1302,7 @@  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;
 	}