linux-kernel - Re: [syzbot] [fs?] [wireless?] general protection fault in simple_recursive

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: <20250724233438.3119-1-hdanton@sina.com>
Date: Fri, 25 Jul 2025 07:34:36 +0800
From: Hillf Danton <hdanton@...a.com>
To: Moon Hee Lee <moonhee.lee.ca@...il.com>
Cc: Al Viro <viro@...iv.linux.org.uk>,
	syzbot+d6ccd49ae046542a0641@...kaller.appspotmail.com,
	linux-kernel@...r.kernel.org,
	syzkaller-bugs@...glegroups.com
Subject: Re: [syzbot] [fs?] [wireless?] general protection fault in simple_recursive_removal (5)

On Thu, 24 Jul 2025 10:29:47 -0700 Moon Hee Lee wrote:
> On Thu, Jul 24, 2025 at 8:58 AM Al Viro <viro@...iv.linux.org.uk> wrote:
> > It might paper over the specific reproducer, but that's not a fix...
> > I'm not familiar with that code; will check the details, but in
> > this form it is obviously still racy.
> 
> Thanks for the feedback, Al.
> 
> Agreed, this only papers over the issue. I'm tracing the
> sta_info_destroy() path to confirm the race and will follow up with a
> proper fix if confirmed.
>
A look at net/mac80211/debugfs_netdev.c:1021 [1] helps to prepare a proper fix.

[1] https://lore.kernel.org/lkml/6881aed3.a00a0220.2f88df.000b.GAE@google.com/