[PATCH 6.18.y] perf python: Free the parse error entries when parsing fails

[Sasha Levin <sashal@kernel.org>]

From: Arnaldo Carvalho de Melo <acme@redhat.com>

[ Upstream commit 39e0022c89abcdc1a811dfc0aeec2a2b9010b660 ]

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@kernel.org>
Closes: https://lore.kernel.org/r/sashiko-outbox-173525@kernel.org
Reviewed-by: Ian Rogers <irogers@google.com>
Tested-by: Ian Rogers <irogers@google.com>
Cc: stable@vger.kernel.org
Assisted-by: LLM
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
[ sashal: adjusted context for a stack-allocated event list using evlist__exit() instead of evlist__put() ]
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
 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 a65a4d9f8cc83..2fa9670bc51f0 100644
--- a/tools/perf/util/python.c
+++ b/tools/perf/util/python.c
@@ -2075,9 +2075,11 @@ static PyObject *pyrf__parse_events(PyObject *self, PyObject *args)
 	evlist__init(&evlist, cpus, threads);
 	if (parse_events(&evlist, input, &err)) {
 		parse_events_error__print(&err, input);
+		parse_events_error__exit(&err);
 		PyErr_SetFromErrno(PyExc_OSError);
 		return NULL;
 	}
+	parse_events_error__exit(&err);
 	result = pyrf_evlist__from_evlist(&evlist);
 	evlist__exit(&evlist);
 	return result;
-- 
2.53.0