Re: Linux kernel: powerpc: KVM guest can trigger host crash on Power8
Hi Michael!
On 10/27/21 07:30, Michael Ellerman wrote:
> I did test the repro case you gave me before (in the bugzilla), which
> was building glibc, that passes for me with a patched host.
Did you manage to crash the unpatched host? If the unpatched host crashes
for you but the patched doesn't, I will make sure I didn't accidentally
miss anything.
Also, I'll try a kernel from git with Debian's config.
> I guess we have yet another bug.
>
> I tried the following in a debian BE VM and it completed fine:
>
> $ dget -u http://ftp.debian.org/debian/pool/main/g/git/git_2.33.1-1.dsc
> $ sbuild -d sid --arch=powerpc --no-arch-all git_2.33.1-1.dsc
>
> Same for ppc64.
>
> And I also tried both at once, repeatedly in a loop.
Did you try building gcc-11 for powerpc and ppc64 both at once?
> I guess it's something more complicated.
>
> What exact host/guest kernel versions and configs are you running?
Both the host and guest are running Debian's stock 5.14.12 kernel. The host has
a kernel with your patches applied, the guest doesn't.
Let me do some more testing.
Adrian
--
.''`. John Paul Adrian Glaubitz
: :' : Debian Developer - glaubitz@debian.org
`. `' Freie Universitaet Berlin - glaubitz@physik.fu-berlin.de
`- GPG: 62FF 8A75 84E0 2956 9546 0006 7426 3B37 F5B5 F913
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