netdev - Re: [syzbot] [mptcp?] general protection fault in proc

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: <95a51b11-cc3c-4282-8069-4549f9fcc321@kernel.org>
Date: Sun, 5 Jan 2025 18:03:40 +0100
From: Matthieu Baerts <matttbe@...nel.org>
To: Al Viro <viro@...iv.linux.org.uk>
Cc: Eric Dumazet <edumazet@...gle.com>, davem@...emloft.net,
 geliang@...nel.org, horms@...nel.org, kuba@...nel.org,
 linux-kernel@...r.kernel.org, martineau@...nel.org, mptcp@...ts.linux.dev,
 netdev@...r.kernel.org, pabeni@...hat.com, syzkaller-bugs@...glegroups.com,
 syzbot <syzbot+e364f774c6f57f2c86d1@...kaller.appspotmail.com>
Subject: Re: [syzbot] [mptcp?] general protection fault in proc_scheduler

Hi Al,

On 04/01/2025 21:21, Al Viro wrote:
> The real issue (and the one that affects more than just this scenario) is
> the use of current->nsproxy->net to get to the damn thing.
> 
> Why not something like

(...)

> seeing that the data object you really want to access is
> mptcp_get_pernet(net)->scheduler and you have that pointer
> stored in table->data at the registration time?

Good point, thank you for the suggestion! :)

I will do this modification.

Cheers,
Matt
-- 
Sponsored by the NGI0 Core fund.