linux-kernel - Re: general protection fault in pvclock_gtod

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Message-ID: <20200630061228.GU12312@linux.intel.com>
Date:   Mon, 29 Jun 2020 23:12:28 -0700
From:   Sean Christopherson <sean.j.christopherson@...el.com>
To:     syzbot <syzbot+b46fb19f175c5c7d1f03@...kaller.appspotmail.com>
Cc:     bp@...en8.de, hpa@...or.com, jmattson@...gle.com, joro@...tes.org,
        kvm@...r.kernel.org, linux-kernel@...r.kernel.org,
        mingo@...hat.com, pbonzini@...hat.com,
        syzkaller-bugs@...glegroups.com, tglx@...utronix.de,
        vkuznets@...hat.com, wanpengli@...cent.com, x86@...nel.org
Subject: Re: general protection fault in pvclock_gtod_notify

On Fri, Jun 26, 2020 at 01:08:19PM -0700, syzbot wrote:
> Hello,
> 
> syzbot found the following crash on:
> 
> HEAD commit:    4a21185c Merge git://git.kernel.org/pub/scm/linux/kernel/g..
> git tree:       upstream
> console output: https://syzkaller.appspot.com/x/log.txt?x=16958f4d100000
> kernel config:  https://syzkaller.appspot.com/x/.config?x=bf3aec367b9ab569
> dashboard link: https://syzkaller.appspot.com/bug?extid=b46fb19f175c5c7d1f03
> compiler:       gcc (GCC) 10.1.0-syz 20200507
> syz repro:      https://syzkaller.appspot.com/x/repro.syz?x=1080e9c5100000
> C reproducer:   https://syzkaller.appspot.com/x/repro.c?x=1685d2e3100000

#syz dup: general protection fault in syscall_return_slowpath