linux-kernel - [PATCH] selftests: vm: Fix resource leak when return error

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Date:   Wed, 15 Jun 2022 17:36:29 +0800
From:   Ding Xiang <dingxiang@...s.chinamobile.com>
To:     akpm@...ux-foundation.org, shuah@...nel.org
Cc:     linux-mm@...ck.org, linux-kselftest@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: [PATCH] selftests: vm: Fix resource leak when return error

When return on an error path, file handle need to be closed
to prevent resource leak

Signed-off-by: Ding Xiang <dingxiang@...s.chinamobile.com>
---
 tools/testing/selftests/vm/ksm_tests.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/tools/testing/selftests/vm/ksm_tests.c b/tools/testing/selftests/vm/ksm_tests.c
index 2fcf24312da8..f5e4e0bbd081 100644
--- a/tools/testing/selftests/vm/ksm_tests.c
+++ b/tools/testing/selftests/vm/ksm_tests.c
@@ -54,6 +54,7 @@ static int ksm_write_sysfs(const char *file_path, unsigned long val)
 	}
 	if (fprintf(f, "%lu", val) < 0) {
 		perror("fprintf");
+		fclose(f);
 		return 1;
 	}
 	fclose(f);
@@ -72,6 +73,7 @@ static int ksm_read_sysfs(const char *file_path, unsigned long *val)
 	}
 	if (fscanf(f, "%lu", val) != 1) {
 		perror("fscanf");
+		fclose(f);
 		return 1;
 	}
 	fclose(f);
-- 
2.31.1