linux-kernel - [PATCH 01/19] perf metric: Fix memory leak in expr__add

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Message-Id: <20200719181320.785305-2-jolsa@kernel.org>
Date:   Sun, 19 Jul 2020 20:13:02 +0200
From:   Jiri Olsa <jolsa@...nel.org>
To:     Arnaldo Carvalho de Melo <acme@...nel.org>
Cc:     Arnaldo Carvalho de Melo <acme@...hat.com>,
        lkml <linux-kernel@...r.kernel.org>,
        Ingo Molnar <mingo@...nel.org>,
        Namhyung Kim <namhyung@...nel.org>,
        Alexander Shishkin <alexander.shishkin@...ux.intel.com>,
        Peter Zijlstra <a.p.zijlstra@...llo.nl>,
        Michael Petlan <mpetlan@...hat.com>,
        Andi Kleen <ak@...ux.intel.com>,
        Kajol Jain <kjain@...ux.ibm.com>,
        John Garry <john.garry@...wei.com>,
        "Paul A. Clarke" <pc@...ibm.com>,
        Stephane Eranian <eranian@...gle.com>,
        Ian Rogers <irogers@...gle.com>
Subject: [PATCH 01/19] perf metric: Fix memory leak in expr__add_id function

Arnaldo found that we don't release value data in case the
hashmap__set fails. Releasing it in case of an error.

Reported-by: Arnaldo Carvalho de Melo <acme@...hat.com>
Signed-off-by: Jiri Olsa <jolsa@...nel.org>
---
 tools/perf/util/expr.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/tools/perf/util/expr.c b/tools/perf/util/expr.c
index 5d05f9765ed8..578a173d4873 100644
--- a/tools/perf/util/expr.c
+++ b/tools/perf/util/expr.c
@@ -47,6 +47,8 @@ int expr__add_id_val(struct expr_parse_ctx *ctx, const char *id, double val)
 	}
 	ret = hashmap__set(&ctx->ids, id, data_ptr,
 			   (const void **)&old_key, (void **)&old_data);
+	if (ret)
+		free(data_ptr);
 	free(old_key);
 	free(old_data);
 	return ret;
-- 
2.25.4