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Bug#1037959: BUG: kernel NULL pointer dereference in kthread md2_raid6



Hallo Salvatore Bonaccorso,

14.06.23 22:44 Salvatore Bonaccorso:
> Hi Timo,
> 
> On Wed, Jun 14, 2023 at 10:44:01AM +0200, Timo Weingärtner wrote:
> > Package: src:linux
> > Version: 6.1.27-1
> > Severity: important
> > 
> > Dear Maintainer,
> > 
> > yesterday I upgraded my home server to bookworm. When cutting a
> > recording in vdr (reading a big video file while writing out a big video
> > file and a smaller index file) it triggered a bug in the raid6 kernel
> > thread and the vdr process got stuck in D state.
> > 
> > I could reproduce this by starting the video cutting again after reboot.
> > It doesn't happen with the bullseye kernel 5.10.0-23-amd64 which I'm
> > using now.
> 
> Would you be able to test the newst upstream version from 6.1.y series
> and see if the problem persist? How about 6.3.7-1 or 6.4~rc6-1~exp1?
> 
> Would you be in case as well in the position to try to bisect the
> issue?

Skill-wise I could do git bisects and kernel builds, but I'm currently quite 
low on time and reboot/test alone take >10min each.

If you see a promising change in the code you may point me to a kernel package 
to test.


Grüße
Timo

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