linux-kernel - Re: WARNING in kvm_inject_emulated_page

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Message-ID: <00000000000078fab705a741d901@google.com>
Date:   Thu, 04 Jun 2020 06:09:06 -0700
From:   syzbot <syzbot+2a7156e11dc199bdbd8a@...kaller.appspotmail.com>
To:     bp@...en8.de, hpa@...or.com, jmattson@...gle.com, joro@...tes.org,
        junaids@...gle.com, kvm@...r.kernel.org,
        linux-kernel@...r.kernel.org, mingo@...hat.com,
        pbonzini@...hat.com, sean.j.christopherson@...el.com,
        syzkaller-bugs@...glegroups.com, tglx@...utronix.de,
        vkuznets@...hat.com, wanpengli@...cent.com, x86@...nel.org
Subject: Re: WARNING in kvm_inject_emulated_page_fault

syzbot has bisected this bug to:

commit ee1fa209f5e5ca5c1e76c7aa1c2aab292f371f4a
Author: Junaid Shahid <junaids@...gle.com>
Date:   Fri Mar 20 21:28:03 2020 +0000

    KVM: x86: Sync SPTEs when injecting page/EPT fault into L1

bisection log:  https://syzkaller.appspot.com/x/bisect.txt?x=138f49de100000
start commit:   cb8e59cc Merge git://git.kernel.org/pub/scm/linux/kernel/g..
git tree:       upstream
final crash:    https://syzkaller.appspot.com/x/report.txt?x=104f49de100000
console output: https://syzkaller.appspot.com/x/log.txt?x=178f49de100000
kernel config:  https://syzkaller.appspot.com/x/.config?x=a16ddbc78955e3a9
dashboard link: https://syzkaller.appspot.com/bug?extid=2a7156e11dc199bdbd8a
syz repro:      https://syzkaller.appspot.com/x/repro.syz?x=134ca2de100000
C reproducer:   https://syzkaller.appspot.com/x/repro.c?x=178272f2100000

Reported-by: syzbot+2a7156e11dc199bdbd8a@...kaller.appspotmail.com
Fixes: ee1fa209f5e5 ("KVM: x86: Sync SPTEs when injecting page/EPT fault into L1")

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