[PATCH v2 15/16] perf python: Fix memory leak in pyrf__metrics_cb

[Ian Rogers <irogers@google.com>]

In pyrf__metrics_cb, PyDict_SetItem does not steal the reference of the
key and value, so they need to be decref'ed after successful insertion
to avoid memory leaks.

Signed-off-by: Ian Rogers <irogers@google.com>
---
 tools/perf/util/python.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/tools/perf/util/python.c b/tools/perf/util/python.c
index e76a407cb2bb..5471037d04c5 100644
--- a/tools/perf/util/python.c
+++ b/tools/perf/util/python.c
@@ -3567,6 +3567,8 @@ static int pyrf__metrics_cb(const struct pmu_metric *pm,
 		Py_XDECREF(dict);
 		return -ENOMEM;
 	}
+	Py_DECREF(key);
+	Py_DECREF(value);
 
 	if (!add_to_dict(dict, "MetricName", pm->metric_name) ||
 	    !add_to_dict(dict, "PMU", pm->pmu) ||
-- 
2.55.0.rc0.799.gd6f94ed593-goog