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Bug#900821: Found working and failing 5.10 versions and got kernel crash, report from BSP Tilburg (https://deb.li/iiOID)



Control: notfound -1 4.9.88-1+deb9u1
Control: found -1 4.9.88-1

On zondag 20 november 2022 13:55:09 CET Salvatore Bonaccorso wrote:
> Seems the BSP was productive :).

Yeah, once I set up the VM and created the script, it was actually quite easy.

> If you have spare cycles, might you
> check if dacb5d8875cc ("tcp: fix page frag corruption on page fault")
> in 5.16-rc4 is the commit we are searching?
> That one was backported to the 5.10.y series in 5.10.84 and in 5.15.y series
> in 5.15.7 which would fall into your found ranges as well.

IOW: that's your educated guess a git bisect could turn up?
I can try that*, although I'm not clear onto what I should apply it.
Should I apply it to linux/5.10.70-1 or 5.10.46-4 f.e.? Or onto an entirely 
different version?

> OTOH, it fixes 5640f7685831 ("net: use a per task frag allocator")
> which is way much longer back as where the people noticed to be
> introduced.

While the focus has been on the kernel (possibly rightly so), there were 2 
other packages (apache and samba) involved. It could be that on Buster f.e. 
the problem still exists (even with a backports kernel).
I actually did look for an oldstable (net-)installer, but I couldn't find one.
I later realized that maybe there are DVDs of old releases, but I doubt I'll 
do sth with that (at least wrt this bug).

*) I had plenty of cycles when I started this reply, but less so when I'm 
sending it. I may do this some other day though.

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