linux-kernel - Re: BUG: unable to handle kernel paging request in pvclock_gtod

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Date:   Wed, 11 Nov 2020 12:11:15 +0100
From:   Dmitry Vyukov <dvyukov@...gle.com>
To:     syzbot <syzbot+815c663e220da75b02b6@...kaller.appspotmail.com>
Cc:     Bartlomiej Zolnierkiewicz <b.zolnierkie@...sung.com>,
        Borislav Petkov <bp@...en8.de>,
        Dan Carpenter <dan.carpenter@...cle.com>,
        George Kennedy <george.kennedy@...cle.com>,
        "H. Peter Anvin" <hpa@...or.com>,
        Jim Mattson <jmattson@...gle.com>,
        Joerg Roedel <joro@...tes.org>, KVM list <kvm@...r.kernel.org>,
        LKML <linux-kernel@...r.kernel.org>,
        Ingo Molnar <mingo@...hat.com>,
        Paolo Bonzini <pbonzini@...hat.com>,
        "Christopherson, Sean J" <sean.j.christopherson@...el.com>,
        syzkaller-bugs <syzkaller-bugs@...glegroups.com>,
        Thomas Gleixner <tglx@...utronix.de>,
        Vitaly Kuznetsov <vkuznets@...hat.com>, wanpengli@...cent.com,
        "the arch/x86 maintainers" <x86@...nel.org>
Subject: Re: BUG: unable to handle kernel paging request in pvclock_gtod_notify

On Sun, Nov 1, 2020 at 11:11 AM syzbot
<syzbot+815c663e220da75b02b6@...kaller.appspotmail.com> wrote:
>
> syzbot suspects this issue was fixed by commit:
>
> commit a49145acfb975d921464b84fe00279f99827d816
> Author: George Kennedy <george.kennedy@...cle.com>
> Date:   Tue Jul 7 19:26:03 2020 +0000
>
>     fbmem: add margin check to fb_check_caps()
>
> bisection log:  https://syzkaller.appspot.com/x/bisect.txt?x=17499724500000
> start commit:   60e72093 Merge tag 'clk-fixes-for-linus' of git://git.kern..
> git tree:       upstream
> kernel config:  https://syzkaller.appspot.com/x/.config?x=89ab6a0c48f30b49
> dashboard link: https://syzkaller.appspot.com/bug?extid=815c663e220da75b02b6
> syz repro:      https://syzkaller.appspot.com/x/repro.syz?x=1162b04d900000
> C reproducer:   https://syzkaller.appspot.com/x/repro.c?x=135e7383900000
>
> If the result looks correct, please mark the issue as fixed by replying with:
>
> #syz fix: fbmem: add margin check to fb_check_caps()
>
> For information about bisection process see: https://goo.gl/tpsmEJ#bisection

#syz fix: fbmem: add margin check to fb_check_caps()