linux-kernel - [PATCH v2] samples/landlock: fix path

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Date:   Wed, 28 Apr 2021 14:38:52 -0700
From:   trix@...hat.com
To:     mic@...ikod.net, nathan@...nel.org, ndesaulniers@...gle.com
Cc:     linux-security-module@...r.kernel.org,
        linux-kernel@...r.kernel.org, clang-built-linux@...glegroups.com,
        Tom Rix <trix@...hat.com>
Subject: [PATCH v2] samples/landlock: fix path_list memory leak

From: Tom Rix <trix@...hat.com>

Clang static analysis reports this error

sandboxer.c:134:8: warning: Potential leak of memory
  pointed to by 'path_list'
        ret = 0;
              ^
path_list is allocated in parse_path() but never freed.

Signed-off-by: Tom Rix <trix@...hat.com>
---
v2:
  - Remove NULL ptr check
---
 samples/landlock/sandboxer.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/samples/landlock/sandboxer.c b/samples/landlock/sandboxer.c
index 7a15910d2171..8859fc193542 100644
--- a/samples/landlock/sandboxer.c
+++ b/samples/landlock/sandboxer.c
@@ -134,6 +134,7 @@ static int populate_ruleset(
 	ret = 0;
 
 out_free_name:
+	free(path_list);
 	free(env_path_name);
 	return ret;
 }
-- 
2.26.3