releases/5.13.6/perf-probe-file-delete-namelist-in-del_events-on-the.patch

From f48c3cbd4b3a765cf75523307ffdc321de4a6742 Mon Sep 17 00:00:00 2001
From: Sasha Levin <sashal@kernel.org>
Date: Thu, 15 Jul 2021 18:07:25 +0200
Subject: perf probe-file: Delete namelist in del_events() on the error path

From: Riccardo Mancini <rickyman7@gmail.com>

[ Upstream commit e0fa7ab42232e742dcb3de9f3c1f6127b5adc019 ]

ASan reports some memory leaks when running:

  # perf test "42: BPF filter"

This second leak is caused by a strlist not being dellocated on error
inside probe_file__del_events.

This patch adds a goto label before the deallocation and makes the error
path jump to it.

Signed-off-by: Riccardo Mancini <rickyman7@gmail.com>
Fixes: e7895e422e4da63d ("perf probe: Split del_perf_probe_events()")
Cc: Ian Rogers <irogers@google.com>
Cc: Jiri Olsa <jolsa@redhat.com>
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Link: http://lore.kernel.org/lkml/174963c587ae77fa108af794669998e4ae558338.1626343282.git.rickyman7@gmail.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
 tools/perf/util/probe-file.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/tools/perf/util/probe-file.c b/tools/perf/util/probe-file.c
index 52273542e6ef..3f6de459ac2b 100644
--- a/tools/perf/util/probe-file.c
+++ b/tools/perf/util/probe-file.c
@@ -342,11 +342,11 @@ int probe_file__del_events(int fd, struct strfilter *filter)
 
 	ret = probe_file__get_events(fd, filter, namelist);
 	if (ret < 0)
-		return ret;
+		goto out;
 
 	ret = probe_file__del_strlist(fd, namelist);
+out:
 	strlist__delete(namelist);
-
 	return ret;
 }
 
-- 
2.30.2