linux-kernel - Re: [syzbot] [afs?] general protection fault in afs_atcell_get

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Message-ID: <tencent_0260977E366A4A26744576D967063D013609@qq.com>
Date: Tue, 18 Mar 2025 19:17:11 +0800
From: Edward Adam Davis <eadavis@...com>
To: dhowells@...hat.com
Cc: enjuk@...zon.com,
	linux-afs@...ts.infradead.org,
	linux-kernel@...r.kernel.org,
	marc.dionne@...istor.com,
	syzbot+76a6f18e3af82e84f264@...kaller.appspotmail.com,
	syzkaller-bugs@...glegroups.com
Subject: Re: [syzbot] [afs?] general protection fault in afs_atcell_get_link

On Tue, 18 Mar 2025 10:23:47 +0000, David Howells wrote:
> commit 3ce74c88a6708de1842dbebc10f83013718324d0
> Author: David Howells <dhowells@...hat.com>
> Date:   Tue Mar 18 10:18:29 2025 +0000
My fix already sent.
https://lore.kernel.org/all/tencent_8CA5671E3C533638973237484A0874917609@qq.com/
> 
>     afs: Fix afs_atcell_get_link() to check if ws_cell is unset first
> 
>     Fix afs_atcell_get_link() to check if the workstation cell is unset before
>     doing the RCU pathwalk bit where we dereference that.
> 
>     Fixes: 823869e1e616 ("afs: Fix afs_atcell_get_link() to handle RCU pathwalk")
>     Reported-by: syzbot+76a6f18e3af82e84f264@...kaller.appspotmail.com
>     Signed-off-by: David Howells <dhowells@...hat.com>
>     cc: Marc Dionne <marc.dionne@...istor.com>
>     cc: linux-afs@...ts.infradead.org
>     cc: linux-fsdevel@...r.kernel.org

BR,
Edward