linux-kernel - Re: WARNING in switch_fpu

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Message-ID: <000000000000ac36ba05a1793693@google.com>
Date:   Sun, 22 Mar 2020 15:41:03 -0700
From:   syzbot <syzbot+f2ca20d4aa1408b0385a@...kaller.appspotmail.com>
To:     alexander.deucher@....com, bigeasy@...utronix.de, bp@...en8.de,
        dave.hansen@...el.com, dvyukov@...gle.com, hpa@...or.com,
        linmiaohe@...wei.com, linux-kernel@...r.kernel.org,
        mingo@...hat.com, nicholas.kazlauskas@....com, pbonzini@...hat.com,
        riel@...riel.com, sean.j.christopherson@...el.com,
        sunpeng.li@....com, syzkaller-bugs@...glegroups.com,
        tglx@...utronix.de, x86@...nel.org, zhan.liu@....com
Subject: Re: WARNING in switch_fpu_return

syzbot suspects this bug was fixed by commit:

commit 3009afc6e39e78708d8fb444ae50544b3bcd3a3f
Author: Sean Christopherson <sean.j.christopherson@...el.com>
Date:   Wed Jan 22 04:43:39 2020 +0000

    KVM: x86: Use a typedef for fastop functions

bisection log:  https://syzkaller.appspot.com/x/bisect.txt?x=1667aa4be00000
start commit:   bf8d1cd4 Merge tag 'scsi-fixes' of git://git.kernel.org/pu..
git tree:       upstream
kernel config:  https://syzkaller.appspot.com/x/.config?x=ed9d672709340e35
dashboard link: https://syzkaller.appspot.com/bug?extid=f2ca20d4aa1408b0385a
syz repro:      https://syzkaller.appspot.com/x/repro.syz?x=151d549ee00000

If the result looks correct, please mark the bug fixed by replying with:

#syz fix: KVM: x86: Use a typedef for fastop functions

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