linux-kernel - Re: [syzbot] possible deadlock in kvm_synchronize

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Message-ID: <dd9de982-e94d-163f-067b-d86d95e947a8@redhat.com>
Date:   Wed, 24 Mar 2021 13:17:00 +0100
From:   Paolo Bonzini <pbonzini@...hat.com>
To:     syzbot <syzbot+9a89b866d3fc11acc3b6@...kaller.appspotmail.com>,
        bp@...en8.de, hpa@...or.com, jmattson@...gle.com, joro@...tes.org,
        kvm@...r.kernel.org, linux-kernel@...r.kernel.org,
        mingo@...hat.com, seanjc@...gle.com,
        syzkaller-bugs@...glegroups.com, tglx@...utronix.de,
        vkuznets@...hat.com, wanpengli@...cent.com, x86@...nel.org
Subject: Re: [syzbot] possible deadlock in kvm_synchronize_tsc

On 24/03/21 08:24, syzbot wrote:
> Hello,
> 
> syzbot found the following issue on:
> 
> HEAD commit:    1c273e10 Merge tag 'zonefs-5.12-rc4' of git://git.kernel.o..
> git tree:       upstream
> console output: https://syzkaller.appspot.com/x/log.txt?x=1063d14ed00000
> kernel config:  https://syzkaller.appspot.com/x/.config?x=6abda3336c698a07
> dashboard link: https://syzkaller.appspot.com/bug?extid=9a89b866d3fc11acc3b6
> userspace arch: i386
> syz repro:      https://syzkaller.appspot.com/x/repro.syz?x=10bf56f6d00000
> C reproducer:   https://syzkaller.appspot.com/x/repro.c?x=174e36dcd00000
> 
> IMPORTANT: if you fix the issue, please add the following tag to the commit:
> Reported-by: syzbot+9a89b866d3fc11acc3b6@...kaller.appspotmail.com

#syz dup: possible deadlock in scheduler_tick