RE: "BUG at kernel/entry/common.c:407!" on 5.10.133+

[David Chen]

> -----Original Message-----
> From: Thorsten Leemhuis <regressions@xxxxxxxxxxxxx>
> Sent: Tuesday, September 27, 2022 12:44 AM
> To: David Chen <david.chen@xxxxxxxxxxx>; linux-kernel@xxxxxxxxxxxxxxx
> Cc: Peter Zijlstra <peterz@xxxxxxxxxxxxx>; Borislav Petkov <bp@xxxxxxx>; Josh Poimboeuf <jpoimboe@xxxxxxxxxx>
> Subject: Re: "BUG at kernel/entry/common.c:407!" on 5.10.133+
> 
> Hi, this is your Linux kernel regression tracker.
> 
> On 26.09.22 19:57, David Chen wrote:
> >
> > On 5.10 branch starting from 5.10.133, if I do:
> >
> >   echo 1 > /proc/sys/kernel/stack_tracer_enabled
> >
> > The system will lock up, and the console will keep spewing
> > "BUG at kernel/entry/common.c:407!" indefinitely.
> >
> > I bisect this issue down to "c9eb5dc x86: Use return-thunk in asm code".
> > Though interestingly, when I tried this on 5.19.11 which also contains the
> > change, the issue didn't occur. Also this issue happens on both KVM guest and
> > Virtualbox guest. I'm not sure if this affects non-VM for not.
> >
> > Any help is appreciated.
> 
> Quick question: what was the latest version you tried to reproduce this
> on? There were a few ftrace fixes that went into 5.10.144 (released one
> week ago).
> 
> Ciao, Thorsten

Hi, I think the last version I tried was 5.10.143. I just tried 5.10.145 and it seems
to be working fine.
Thanks a lot.

David