Re: general protection fault in kvm_coalesced_mmio_init

[syzbot]

syzbot has bisected this bug to:

commit 9121923c457d1d8667a6e3a67302c29e5c5add6b
Author: Jim Mattson <jmattson@xxxxxxxxxx>
Date:   Thu Oct 24 23:03:26 2019 +0000

    kvm: Allocate memslots and buses before calling kvm_arch_init_vm

bisection log:  https://syzkaller.appspot.com/x/bisect.txt?x=13eaf7ece00000
start commit:   00aff683 Merge tag 'for-5.4-rc6-tag' of git://git.kernel.o..
git tree:       upstream
final crash:    https://syzkaller.appspot.com/x/report.txt?x=101af7ece00000
console output: https://syzkaller.appspot.com/x/log.txt?x=17eaf7ece00000
kernel config:  https://syzkaller.appspot.com/x/.config?x=896c87b73c6fcda6
dashboard link: https://syzkaller.appspot.com/bug?extid=e27e7027eb2b80e44225
syz repro:      https://syzkaller.appspot.com/x/repro.syz?x=17ed65aae00000

Reported-by: syzbot+e27e7027eb2b80e44225@xxxxxxxxxxxxxxxxxxxxxxxxx
Fixes: 9121923c457d ("kvm: Allocate memslots and buses before calling  
kvm_arch_init_vm")

For information about bisection process see: https://goo.gl/tpsmEJ#bisection