netdev - Re: [PATCH net] tun: Add missing bpf_net_ctx_clear() in do_xdp

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: <20240726074102.74b42a9b@kernel.org>
Date: Fri, 26 Jul 2024 07:41:02 -0700
From: Jakub Kicinski <kuba@...nel.org>
To: Jeongjun Park <aha310510@...il.com>
Cc: syzbot+44623300f057a28baf1e@...kaller.appspotmail.com,
 davem@...emloft.net, edumazet@...gle.com, pabeni@...hat.com,
 ast@...nel.org, daniel@...earbox.net, hawk@...nel.org,
 john.fastabend@...il.com, willemdebruijn.kernel@...il.com,
 jasowang@...hat.com, bigeasy@...utronix.de, bpf@...r.kernel.org,
 linux-kernel@...r.kernel.org, netdev@...r.kernel.org,
 syzkaller-bugs@...glegroups.com
Subject: Re: [PATCH net] tun: Add missing bpf_net_ctx_clear() in
 do_xdp_generic()

On Fri, 26 Jul 2024 06:40:49 +0900 Jeongjun Park wrote:
> There are cases where do_xdp_generic returns bpf_net_context without 
> clearing it. This causes various memory corruptions, so the missing 
> bpf_net_ctx_clear must be added.
> 
> Reported-by: syzbot+44623300f057a28baf1e@...kaller.appspotmail.com
> Fixes: fecef4cd42c6 ("tun: Assign missing bpf_net_context.")
> Signed-off-by: Jeongjun Park <aha310510@...il.com>

Also likely:

Reported-by: syzbot+3c2b6d5d4bec3b904933@...kaller.appspotmail.com
Reported-by: syzbot+707d98c8649695eaf329@...kaller.appspotmail.com

Right?