[PATCH 13/27] selftests/landlock: Fix memory leak in audit_init_filter_exe()

[Günther Noack]

audit_init_filter_exe() does not free the buffer returned by realpath(3)
when the path is too long.

Assisted-by: LLM
Signed-off-by: Günther Noack <gnoack3000@xxxxxxxxx>
---
 tools/testing/selftests/landlock/audit.h | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/tools/testing/selftests/landlock/audit.h b/tools/testing/selftests/landlock/audit.h
index d428ce802f49..1e533b4e26db 100644
--- a/tools/testing/selftests/landlock/audit.h
+++ b/tools/testing/selftests/landlock/audit.h
@@ -507,8 +507,10 @@ static int audit_init_filter_exe(struct audit_filter *filter, const char *path)
 
 	/* No need for the terminating NULL byte. */
 	filter->exe_len = strlen(absolute_path);
-	if (filter->exe_len > sizeof(filter->exe))
+	if (filter->exe_len > sizeof(filter->exe)) {
+		free(absolute_path);
 		return -E2BIG;
+	}
 
 	memcpy(filter->exe, absolute_path, filter->exe_len);
 	free(absolute_path);
-- 
2.56.0