linux-kernel - Re: [PATCH] selftests/bpf:fix a resource leak

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-ID: <847bcc7c-e54e-648a-be47-59e0a6d0853e@iogearbox.net>
Date: Sat, 29 Jun 2024 00:23:18 +0200
From: Daniel Borkmann <daniel@...earbox.net>
To: Zhu Jun <zhujun2@...s.chinamobile.com>, shuah@...nel.org
Cc: ast@...nel.org, andrii@...nel.org, martin.lau@...ux.dev,
 eddyz87@...il.com, song@...nel.org, yonghong.song@...ux.dev,
 john.fastabend@...il.com, kpsingh@...nel.org, sdf@...ichev.me,
 haoluo@...gle.com, jolsa@...nel.org, mykolal@...com, bpf@...r.kernel.org,
 linux-kselftest@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] selftests/bpf:fix a resource leak

On 6/27/24 8:01 AM, Zhu Jun wrote:
> The requested resources should be closed before return
> in main(), otherwise resource leak will occur
> 
> Signed-off-by: Zhu Jun <zhujun2@...s.chinamobile.com>
> ---
>   tools/testing/selftests/bpf/test_sockmap.c | 2 +-
>   1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/tools/testing/selftests/bpf/test_sockmap.c b/tools/testing/selftests/bpf/test_sockmap.c
> index a34e95040994..03d5dd617c4a 100644
> --- a/tools/testing/selftests/bpf/test_sockmap.c
> +++ b/tools/testing/selftests/bpf/test_sockmap.c
> @@ -2092,7 +2092,7 @@ int main(int argc, char **argv)
>   	if (err) {
>   		fprintf(stderr, "populate program: (%s) %s\n",
>   			bpf_file, strerror(errno));
> -		return 1;
> +		goto out;
>   	}
>   	running = 1;

There's one more when cgroup_setup_and_join() fails a bit higher up
where we end up leaking options.whitelist/options.blacklist. Maybe
could you reorder the free() towards the end, add a new label, set
err to cg_fd and jump there.

Thanks,
Daniel