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Date:   Thu, 11 Apr 2019 14:39:01 -0700
From:   syzbot <syzbot+86c0a866f80d88349f1f@...kaller.appspotmail.com>
To:     ast@...nel.org, daniel@...earbox.net, davem@...emloft.net,
        hpa@...or.com, jhs@...atatu.com, jiri@...nulli.us,
        kvm@...r.kernel.org, linux-kernel@...r.kernel.org,
        mingo@...hat.com, netdev@...r.kernel.org, pbonzini@...hat.com,
        rkrcmar@...hat.com, syzkaller-bugs@...glegroups.com,
        tglx@...utronix.de, vladbu@...lanox.com, x86@...nel.org,
        xiyou.wangcong@...il.com
Subject: Re: general protection fault in kvm_pv_send_ipi

syzbot has bisected this bug to:

commit 653cd284a8a857ddfcf24f5bc3bd204a229f6c9f
Author: Vlad Buslov <vladbu@...lanox.com>
Date:   Tue Aug 14 18:46:16 2018 +0000

     net: sched: always disable bh when taking tcf_lock

bisection log:  https://syzkaller.appspot.com/x/bisect.txt?x=16e25dbb200000
start commit:   05193597 Merge branch 'for-4.19' of git://git.kernel.org/p..
git tree:       upstream
final crash:    https://syzkaller.appspot.com/x/report.txt?x=15e25dbb200000
console output: https://syzkaller.appspot.com/x/log.txt?x=11e25dbb200000
kernel config:  https://syzkaller.appspot.com/x/.config?x=3b576e333ca31bb2
dashboard link: https://syzkaller.appspot.com/bug?extid=86c0a866f80d88349f1f
syz repro:      https://syzkaller.appspot.com/x/repro.syz?x=137d861e400000

Reported-by: syzbot+86c0a866f80d88349f1f@...kaller.appspotmail.com
Fixes: 653cd284a8a8 ("net: sched: always disable bh when taking tcf_lock")

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

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