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Re: NetBSD syzbot broken?
Hello,
Thanks for reaching out!
That is indeed due to some problem with the host qemu, but that makes it
even more mysterious. I didn't update anything on the host and I think
nobody else did that either. And it's now unfortunately impossible to
pinpoint the exact moment when it began to fail with "failed to create the
VM Instance:" -- syzbot cleans up old logs and in some of these logs there
are actually ordinary NetBSD compilation errors. Could a NetBSD host have
updated the qemu package itself?
In the syzkaller code, we do have an option to distinguish whether we need
to explicitly specify the raw format or not:
https://github.com/google/syzkaller/blob/51c4dcff83b0574620c280cc5130ef59cc4a2e32/vm/qemu/qemu.go#L459
We can set UseNewQemuImageOptions=true for NetBSD and it should hopefully
be working again. But I still don't understand why it has popped up..
--
Aleksandr
On Fri, Mar 29, 2024 at 4:05 AM Taylor R Campbell <riastradh%netbsd.org@localhost>
wrote:
> It's been a little while since I looked at syzbot, and it looks like
> all three NetBSD builders are broken right now, but possibly because
> of an issue on the host rather than in the NetBSD guest:
>
>
> https://syzkaller.appspot.com/bug?id=27607fdf2130867e13d3546a583d489bab005260
>
> > failed to create the VM Instance: failed to read from qemu: EOF
> > WARNING: Image format was not specified for
> '/syzkaller/managers/ci2-netbsd/latest.tmp/image' and probing guessed raw
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