linux uml segfault

[Anton Ivanov]

On 23/02/2021 17:26, Ritesh Raj Sarraf wrote:
> Added the debian bug report in CC.
> 
> On Tue, 2021-02-23 at 17:19 +0000, Anton Ivanov wrote:
>>> The current Debian user-mode-linux package in unstable is based on
>>> the 5.10.5 stable source which includes the mentioned patch, but is
>>> still causing an error for some users.
>>
>> After updating the tree to 5.10.5 and applying all Debian patches
>> from the package, I cannot reproduce the bug.
>>
>> I am running it on 5.10, 5.2 and 4.19 hosts with the same parameters
>> without issues. Hosts are all up to date Debian 10.8 and so is the
>> UML userspace.
>>
> 
> Did you mean 5.10, 5.2 and 4.19 (UML) guests ?

No. Hosts.

I have several 6core/12thread Ryzens which are used for development 
testing.

They all use identical userspace with the sole difference being the 
kernel. They all use a selection of 5.x because 4.19 does not support 
the hardware properly.

The 4.19 testing is done on my old "test farm" which is all A8s and 
Athlon X760.

> 
> We've seen this happen on Debian Testing and Unstable Host (of which
> the former would soon be the next stable i.e. Debian Bullseye).



> 
> In our tests, when running the same linux uml binary (5.10) on a Debian
> Stable Host, it is working fine.
> 


OK. I will upgrade one of my systems to Debian testing to try to 
reproduce this.


-- 
Anton R. Ivanov
https://www.kot-begemot.co.uk/