[syzbot] [afs?] general protection fault in afs_atcell_get_link

[Edward Adam Davis]

On Tue, 18 Mar 2025 10:23:47 +0000, David Howells wrote:
> commit 3ce74c88a6708de1842dbebc10f83013718324d0
> Author: David Howells <dhowells at redhat.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 at syzkaller.appspotmail.com
>     Signed-off-by: David Howells <dhowells at redhat.com>
>     cc: Marc Dionne <marc.dionne at auristor.com>
>     cc: linux-afs at lists.infradead.org
>     cc: linux-fsdevel at vger.kernel.org

BR,
Edward