linux-kernel - Re: [PATCH] afs: Fix afs_atcell_get_link() to check if ws

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Message-ID: <tencent_AF7BAE6E502C3D6F989474EAE2ED6ACE600A@qq.com>
Date: Tue, 18 Mar 2025 19:33:38 +0800
From: Edward Adam Davis <eadavis@...com>
To: dhowells@...hat.com
Cc: brauner@...nel.org,
	linux-afs@...ts.infradead.org,
	linux-fsdevel@...r.kernel.org,
	linux-kernel@...r.kernel.org,
	marc.dionne@...istor.com,
	syzbot+76a6f18e3af82e84f264@...kaller.appspotmail.com
Subject: Re: [PATCH] afs: Fix afs_atcell_get_link() to check if ws_cell is unset first

On Tue, 18 Mar 2025 11:20:19 +0000, David Howells wrote:
> 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>
> Tested-by: syzbot+76a6f18e3af82e84f264@...kaller.appspotmail.com
> cc: Marc Dionne <marc.dionne@...istor.com>
> cc: linux-afs@...ts.infradead.org
> cc: linux-fsdevel@...r.kernel.org
My fix already sent, it is much earlier than your patch.
https://lore.kernel.org/all/tencent_8CA5671E3C533638973237484A0874917609@qq.com/

BR,
Edward