linux-kernel - Re: [PATCH] selftests/efivarfs: create-read: fix a resource leak

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Message-ID: <2a96e3a8-48a5-46ae-9a0c-b5f2def0a257@linuxfoundation.org>
Date:   Tue, 17 Oct 2023 09:46:47 -0600
From:   Shuah Khan <skhan@...uxfoundation.org>
To:     zhujun2 <zhujun2@...s.chinamobile.com>, shuah@...nel.org
Cc:     linux-kselftest@...r.kernel.org, linux-kernel@...r.kernel.org,
        Shuah Khan <skhan@...uxfoundation.org>
Subject: Re: [PATCH] selftests/efivarfs: create-read: fix a resource leak

On 10/16/23 20:33, zhujun2 wrote:
> The opened file should be closed in main(), otherwise resource
> leak will occur
> 

Did you find this by code reading or by any other means. Please
add how you found the problem to the change log.

> Signed-off-by: zhujun2 <zhujun2@...s.chinamobile.com>
> ---
>   tools/testing/selftests/efivarfs/create-read.c | 3 +++
>   1 file changed, 3 insertions(+)
> 
> diff --git a/tools/testing/selftests/efivarfs/create-read.c b/tools/testing/selftests/efivarfs/create-read.c
> index 9674a1939..6812104a5 100644
> --- a/tools/testing/selftests/efivarfs/create-read.c
> +++ b/tools/testing/selftests/efivarfs/create-read.c
> @@ -32,8 +32,11 @@ int main(int argc, char **argv)
>   	rc = read(fd, buf, sizeof(buf));
>   	if (rc != 0) {
>   		fprintf(stderr, "Reading a new var should return EOF\n");
> +		close(fd);
>   		return EXIT_FAILURE;
>   	}
>   
> +	close(fd);
> +

No need for this extra line here.

>   	return EXIT_SUCCESS;
>   }

thanks,
-- Shuah