linux-kernel - Re: [PATCH] net: Fix suspicious RCU usage in bpf_sk_reuseport

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: <3961607.1660655386@warthog.procyon.org.uk>
Date:   Tue, 16 Aug 2022 14:09:46 +0100
From:   David Howells <dhowells@...hat.com>
To:     Hawkins Jiawei <yin31149@...il.com>
Cc:     dhowells@...hat.com, "David S. Miller" <davem@...emloft.net>,
        Eric Dumazet <edumazet@...gle.com>,
        Jakub Kicinski <kuba@...nel.org>,
        Paolo Abeni <pabeni@...hat.com>,
        Alexei Starovoitov <ast@...nel.org>,
        Daniel Borkmann <daniel@...earbox.net>,
        Andrii Nakryiko <andrii@...nel.org>,
        Martin KaFai Lau <kafai@...com>,
        Song Liu <songliubraving@...com>, Yonghong Song <yhs@...com>,
        John Fastabend <john.fastabend@...il.com>,
        KP Singh <kpsingh@...nel.org>, linux-kernel@...r.kernel.org,
        netdev@...r.kernel.org,
        linux-kernel-mentees@...ts.linuxfoundation.org, bpf@...r.kernel.org
Subject: Re: [PATCH] net: Fix suspicious RCU usage in bpf_sk_reuseport_detach()

Hawkins Jiawei <yin31149@...il.com> wrote:

>  	if (socks) {
>  		WRITE_ONCE(sk->sk_user_data, NULL);

Btw, shouldn't this be rcu_assign_pointer() or RCU_INIT_POINTER(), not
WRITE_ONCE()?

David