Re: [Bug 219787] Guest's applications crash with EXCEPTION_SINGLE_STEP (0x80000004)

[Sean Christopherson <seanjc@google.com>]

On Thu, Feb 20, 2025, bugzilla-daemon@kernel.org wrote:
> https://bugzilla.kernel.org/show_bug.cgi?id=219787
> 
> --- Comment #4 from rangemachine@gmail.com ---
> (In reply to Sean Christopherson from comment #2)
> > Are you able to bisect to an exact commit?  There are significant KVM
> > changes in 6.13, but they're almost all related to memory management.  I
> > can't think of anything that would manifest as an unexpected single step
> > #DB, especially not with any consistency.
> > 
> > And just to double check, the only difference in the setup is that the host
> > kernel was upgraded from v6.12 => v6.13?  E.g. there was no QEMU update or
> > guest-side changes?
> 
> I was not able to bisect yet, sorry.

No need to be sorry, you didn't introduce the bug :-)

> And yes, I double checked, the only change is kernel upgraded from v6.12.10
> to v6.13.2 (did not checked v6.13.3 yet, but rc version had some behaviour).

Please let me know if you'll be able to bisect (or not).  Unless I have a random
epiphany, this will likely require bisection.