Bug#1014793: linux-image-5.10.0-16-amd64: Kernel crashes while serving NFS

[Salvatore Bonaccorso <carnil@debian.org>]

Hi Arne,

On Fri, Jul 22, 2022 at 10:18:56AM +0200, Arne Nordmark wrote:
> Den 2022-07-15 kl. 21:58, skrev Salvatore Bonaccorso:
> > I would be interested to either pinpoint the regressing commit
> > upstream beween 5.10.120 and 5.10.127 or conversely the fixing commit
> > beween 5.10.127 upstream and 5.10.130 where you are not able anymore
> > to reproduce the error. What I can say, I have already imported
> > 5.10.130 for furture upload (cf.
> > https://salsa.debian.org/kernel-team/linux/-/merge_requests/506).
> 
> Bisection for the regression proved too hard.
> 
> Bisection for the fix went better, I can get a crash with 5.10.128-00010 but
> not yet with 5.10.128-00011. This indicates that the fixing commit was
> probably:
> 
> commit 6a0b9512a6aa7b7835d8138f5ffdcb4789c093d4
> Author: Chuck Lever <chuck.lever@oracle.com>
> Date:   Thu Jun 30 16:48:18 2022 -0400
> 
>     SUNRPC: Fix READ_PLUS crasher
> 
> which indeed seems to touch code involved in NFS service.
> 
> Consequently, the breaking commit was probably:
> 
> 6c254bf3b637 ("SUNRPC: Fix the calculation of xdr->end in
> xdr_get_next_encode_buffer()")

Thank you and apologies for the delay! The next upload for
bullseye(-security) will contain that fix and will close the bug with
that upload.

Thanks a lot for your investigtive work and bisection to the fix!

Regards,
Salvatore