[Qemu-devel] Re: segfault in ide_read_dma_cb when resetting guest

[Avi Kivity]

Avi Kivity wrote:
> Jan Kiszka wrote:
> > Hi,
> >
> > maybe someone has an immediate idea or can reproduce, I'm currently
> > lacking time to debug this: With latest kvm-userspace I'm seeing
> > sporadic qemu crashes when hard-resetting a guest that currently does
> > some I/O (qcow2 disk in snapshot mode). Below is the backtrace, s is
> > null.
> >
> > So far the issue does not show up with -no-kvm or with upstream qemu
> > (also without kvm as upstream's reset in kvm mode is not working yet).
> >
> >   
>
> I think I broke it -- cancellation assumes aiocbs were generated by 
> the block format driver, but there are now aiocbs that are generated 
> by the  generic code.
>
> The problem is in upstream as well, don't know why you don't see it 
> there (maybe you're seeing a different problem).
>
> I'll come up with a patch.

Patchset just posted to qemu-devel.


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