[PATCH 5.10 039/167] perf dso: Fix memory leak in dso__new_map()

[Greg Kroah-Hartman]

From: Riccardo Mancini <rickyman7@xxxxxxxxx>

[ Upstream commit 581e295a0f6b5c2931d280259fbbfff56959faa9 ]

ASan reports a memory leak when running:

  # perf test "65: maps__merge_in".

The causes of the leaks are two, this patch addresses only the first
one, which is related to dso__new_map().

The bug is that dso__new_map() creates a new dso but never decreases the
refcount it gets from creating it.

This patch adds the missing dso__put().

Signed-off-by: Riccardo Mancini <rickyman7@xxxxxxxxx>
Fixes: d3a7c489c7fd2463 ("perf tools: Reference count struct dso")
Cc: Ian Rogers <irogers@xxxxxxxxxx>
Cc: Jiri Olsa <jolsa@xxxxxxxxxx>
Cc: Mark Rutland <mark.rutland@xxxxxxx>
Cc: Namhyung Kim <namhyung@xxxxxxxxxx>
Cc: Peter Zijlstra <peterz@xxxxxxxxxxxxx>
Link: http://lore.kernel.org/lkml/60bfe0cd06e89e2ca33646eb8468d7f5de2ee597.1626343282.git.rickyman7@xxxxxxxxx
Signed-off-by: Arnaldo Carvalho de Melo <acme@xxxxxxxxxx>
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
---
 tools/perf/util/dso.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/tools/perf/util/dso.c b/tools/perf/util/dso.c
index 55c11e854fe4..b1ff0c9f32da 100644
--- a/tools/perf/util/dso.c
+++ b/tools/perf/util/dso.c
@@ -1141,8 +1141,10 @@ struct map *dso__new_map(const char *name)
 	struct map *map = NULL;
 	struct dso *dso = dso__new(name);
 
-	if (dso)
+	if (dso) {
 		map = map__new2(0, dso);
+		dso__put(dso);
+	}
 
 	return map;
 }
-- 
2.30.2