[PATCH v3 03/12] perf maps: Fix reference count leak in maps__find_ams

[Ian Rogers <irogers@google.com>]

ams and so ams->ms.map is an in argument, however, it is also
overwritten. As a map is reference counted, ensure a map__put is done
before overwriting it.

Signed-off-by: Ian Rogers <irogers@google.com>
Fixes: 42fd623b58db ("perf maps: Get map before returning in maps__find")
---
 tools/perf/util/maps.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/tools/perf/util/maps.c b/tools/perf/util/maps.c
index 8ccc46d515b6..4092211cff62 100644
--- a/tools/perf/util/maps.c
+++ b/tools/perf/util/maps.c
@@ -708,6 +708,7 @@ int maps__find_ams(struct maps *maps, struct addr_map_symbol *ams)
 	if (ams->addr < map__start(ams->ms.map) || ams->addr >= map__end(ams->ms.map)) {
 		if (maps == NULL)
 			return -1;
+		map__put(ams->ms.map);
 		ams->ms.map = maps__find(maps, ams->addr);
 		if (ams->ms.map == NULL)
 			return -1;
-- 
2.52.0.457.g6b5491de43-goog