[PATCH 01/19] perf metric: Fix memory leak in expr__add_id function

[Jiri Olsa]

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@xxxxxxxxxx>
Signed-off-by: Jiri Olsa <jolsa@xxxxxxxxxx>
Acked-by: Ian Rogers <irogers@xxxxxxxxxx>
Cc: Alexander Shishkin <alexander.shishkin@xxxxxxxxxxxxxxx>
Cc: Andi Kleen <ak@xxxxxxxxxxxxxxx>
Cc: John Garry <john.garry@xxxxxxxxxx>
Cc: Kajol Jain <kjain@xxxxxxxxxxxxx>
Cc: Michael Petlan <mpetlan@xxxxxxxxxx>
Cc: Namhyung Kim <namhyung@xxxxxxxxxx>
Cc: Paul Clarke <pc@xxxxxxxxxx>
Cc: Peter Zijlstra <peterz@xxxxxxxxxxxxx>
Cc: Stephane Eranian <eranian@xxxxxxxxxx>
Link: http://lore.kernel.org/lkml/20200719181320.785305-2-jolsa@xxxxxxxxxx
Signed-off-by: Arnaldo Carvalho de Melo <acme@xxxxxxxxxx>
---
 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