Re: [PATCH 5.4 0/2] Backport few dfs related fixes to cifs

[Bhatnagar, Rishabh]

On 6/7/23 12:07 PM, Greg KH wrote:
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> On Wed, Jun 07, 2023 at 06:53:11PM +0000, Rishabh Bhatnagar wrote:
> > Recently we have been seeing kernel panic in cifs_reconnect function
> > while accessing tgt_list. Looks like tgt_list is not initialized
> > correctly. There are fixes already present in 5.10 and later trees.
> > Backporting them to 5.4
> >
> >   CIFS VFS: \\172.30.1.14 cifs_reconnect: no target servers for DFS
> >   failover
> >   BUG: unable to handle page fault for address: fffffffffffffff8
> >   #PF: supervisor read access in kernel mode
> >   #PF: error_code(0x0000) - not-present page
> >   PGD 260e067 P4D 260e067 PUD 2610067 PMD 0
> >   Oops: 0000 [#1] SMP PTI
> >   RIP: 0010:cifs_reconnect+0x51d/0xef0 [cifs]
> >   RSP: 0018:ffffc90000693da0 EFLAGS: 00010282
> >   RAX: fffffffffffffff8 RBX: ffff8887fa63b800 RCX: fffffffffffffff8
> >   Call Trace:
> >   cifs_handle_standard+0x18d/0x1b0 [cifs]
> >   cifs_demultiplex_thread+0xa5c/0xc90 [cifs]
> >   kthread+0x113/0x130
> >
> > *** BLURB HERE ***
> No blurb?
>
> And this says 5.4, yet your patches say 5.10?
>
> Totally confused...
>
> greg k-h

These patches are applicable for 5.4. Will send another version with 
that fixed.
Apologies for the mess.