Bug#973433: linux-image-5.9.0-1-amd64: kernel dies with: kernel: BUG: NULL pointer dereference

[Salvatore Bonaccorso <carnil@debian.org>]

Source: linux
Source-Version: 5.9.11-1 

Hi Simon,

On Fri, Oct 30, 2020 at 11:09:40AM +0100, Simon Kainz wrote:
> Package: src:linux
> Version: 5.9.1-1
> Severity: critical
> Justification: breaks the whole system
> 
> Dear Maintainer,
> 
> Please see the attached crash dump. This machine is a SLURM head
> node, so usually not much load besides some occasional compile runs.
> We a running a glusterfs filesystem on all cluster nodes, maybe
> heavy disk I/O triggers this issue.

This looks to be fixed with 4349a83a3190 ("mm: fix
readahead_page_batch for retry entries") which was in applied in
5.10-rc5 and backported to 5.9.11 as well.

I'm closing the bug with this version, but in case you still
experience the issue please report back.

Regards,
Salvatore