linux-kernel - Re: [PATCH] net: remove check before __cgroup_bpf_run_filter

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] [day] [month] [year] [list]

Date: Fri, 9 Feb 2024 10:36:16 -0500
From: Oliver Crumrine <ozlinuxc@...il.com>
To: Stanislav Fomichev <sdf@...gle.com>
Cc: bpf@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] net: remove check before __cgroup_bpf_run_filter_skb

On Fri, Feb 09, 2024 at 11:00:09AM -0800, Stanislav Fomichev wrote:
> Maybe we should instead remove "(!sk || !sk_fullsock(sk))" check from
> __cgroup_bpf_run_filter_skb? BPF_CGROUP_RUN_PROG_INET_EGRESS makes
> care of all those corner conditions. We just need to add those checks to
> BPF_CGROUP_RUN_PROG_INET_INGRESS.
> 
> Let me also CC Kui-Feng, he was touching this part recently in commit
> 223f5f79f2ce ("bpf, net: Check skb ownership against full socket.").

Completely agree with this -- it would be best from a performance
standpoint. I will send out a v2 of this patch in a few hours.