linux-kernel - Re: general protection fault in kvm_coalesced_mmio

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Date:   Sun, 10 Nov 2019 10:22:00 -0800
From:   syzbot <syzbot+e27e7027eb2b80e44225@...kaller.appspotmail.com>
To:     jmattson@...gle.com, junaids@...gle.com, kvm@...r.kernel.org,
        linux-kernel@...r.kernel.org, pbonzini@...hat.com,
        rkrcmar@...hat.com, syzkaller-bugs@...glegroups.com
Subject: Re: general protection fault in kvm_coalesced_mmio_init

syzbot has bisected this bug to:

commit 9121923c457d1d8667a6e3a67302c29e5c5add6b
Author: Jim Mattson <jmattson@...gle.com>
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@...kaller.appspotmail.com
Fixes: 9121923c457d ("kvm: Allocate memslots and buses before calling  
kvm_arch_init_vm")

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