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

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Message-ID: <c2d63817-dc5b-13eb-2698-4ca39bd0d1c1@linuxfoundation.org>
Date:   Thu, 16 Jun 2022 14:19:54 -0600
From:   Shuah Khan <skhan@...uxfoundation.org>
To:     Ding Xiang <dingxiang@...s.chinamobile.com>,
        akpm@...ux-foundation.org, shuah@...nel.org
Cc:     linux-mm@...ck.org, linux-kselftest@...r.kernel.org,
        linux-kernel@...r.kernel.org,
        Shuah Khan <skhan@...uxfoundation.org>
Subject: Re: [PATCH] selftests: vm: Fix resource leak when return error

On 6/16/22 2:11 PM, Shuah Khan wrote:
> On 6/15/22 3:36 AM, Ding Xiang wrote:
>> 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);
>>
> 
> Looks good to me.
> 
> Reviewed-by: Shuah Khan <skhan@...uxfoundation.org>
> 

I applied this to linux-kselftest fixes for next rc.

thanks,
-- Shuah