[PATCH v4 02/21] perf python: Free the parse error entries when parsing fails

[Arnaldo Carvalho de Melo]

From: Arnaldo Carvalho de Melo <acme@xxxxxxxxxx>

pyrf__parse_events() prints the entries parse_events_error__print()
receives with the details of a failed parse, but returns without freeing
them, leaking whatever parse_events_error__handle() allocated, so call
parse_events_error__exit() on both paths, as the other parse_events()
callers do.

The perf test attr core PMU probe takes this failure path on machines
without a core PMU, where the leak then happens on every test run.

Fixes: f081defccd93 ("perf python: Add parse_events function")
Reported-by: Sashiko <sashiko-bot@xxxxxxxxxx>
Closes: https://lore.kernel.org/r/sashiko-outbox-173525@xxxxxxxxxx
Cc: stable@xxxxxxxxxxxxxxx
Assisted-by: LLM
Signed-off-by: Arnaldo Carvalho de Melo <acme@xxxxxxxxxx>
---
 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 4eb17bdc5fd1231a..60dbe2dad5eb8073 100644
--- a/tools/perf/util/python.c
+++ b/tools/perf/util/python.c
@@ -3824,10 +3824,12 @@ static PyObject *pyrf__parse_events(PyObject *self, PyObject *args)
 	perf_evlist__set_maps(evlist__core(evlist), cpus, threads);
 	if (parse_events(evlist, input, &err)) {
 		parse_events_error__print(&err, input);
+		parse_events_error__exit(&err);
 		PyErr_SetFromErrno(PyExc_OSError);
 		evlist__put(evlist);
 		return NULL;
 	}
+	parse_events_error__exit(&err);
 	result = pyrf_evlist__from_evlist(evlist);
 	evlist__put(evlist);
 	return result;
-- 
2.55.0