linux-kernel - [PATCH v2 3/3] perf metric: Fix memory leaks.

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Message-Id: <20211107090002.3784612-3-irogers@google.com>
Date:   Sun,  7 Nov 2021 01:00:02 -0800
From:   Ian Rogers <irogers@...gle.com>
To:     Peter Zijlstra <peterz@...radead.org>,
        Ingo Molnar <mingo@...hat.com>,
        Arnaldo Carvalho de Melo <acme@...nel.org>,
        Mark Rutland <mark.rutland@....com>,
        Alexander Shishkin <alexander.shishkin@...ux.intel.com>,
        Jiri Olsa <jolsa@...hat.com>,
        Namhyung Kim <namhyung@...nel.org>,
        John Garry <john.garry@...wei.com>,
        linux-perf-users@...r.kernel.org, linux-kernel@...r.kernel.org
Cc:     eranian@...gle.com, Ian Rogers <irogers@...gle.com>
Subject: [PATCH v2 3/3] perf metric: Fix memory leaks.

Certain error paths may leak memory as caught by address sanitizer.
Ensure this is cleaned up to make sure address/leak sanitizer is happy.

Fixes: 5ecd5a0c7d1c ("perf metrics: Modify setup and deduplication")
Signed-off-by: Ian Rogers <irogers@...gle.com>
---
 tools/perf/util/metricgroup.c | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/tools/perf/util/metricgroup.c b/tools/perf/util/metricgroup.c
index 1b43cbc1961d..fffe02aae3ed 100644
--- a/tools/perf/util/metricgroup.c
+++ b/tools/perf/util/metricgroup.c
@@ -228,6 +228,7 @@ static void metric__free(struct metric *m)
 	free(m->metric_refs);
 	expr__ctx_free(m->pctx);
 	free((char *)m->modifier);
+	evlist__delete(m->evlist);
 	free(m);
 }
 
@@ -1482,8 +1483,10 @@ static int parse_groups(struct evlist *perf_evlist, const char *str,
 	}
 
 
-	if (combined_evlist)
+	if (combined_evlist) {
 		evlist__splice_list_tail(perf_evlist, &combined_evlist->core.entries);
+		evlist__delete(combined_evlist);
+	}
 
 	list_for_each_entry(m, &metric_list, nd) {
 		if (m->evlist)
-- 
2.34.0.rc0.344.g81b53c2807-goog