linux-kernel - Re: [syzbot] general protection fault in try_grab_compound

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Message-ID: <0000000000009e89e205c63dda94@google.com>
Date:   Sat, 03 Jul 2021 13:24:06 -0700
From:   syzbot <syzbot+a3fcd59df1b372066f5a@...kaller.appspotmail.com>
To:     akpm@...ux-foundation.org, bp@...en8.de, hpa@...or.com,
        jmattson@...gle.com, joro@...tes.org, kvm@...r.kernel.org,
        linux-kernel@...r.kernel.org, linux-mm@...ck.org,
        mark.rutland@....com, masahiroy@...nel.org, mingo@...hat.com,
        pbonzini@...hat.com, peterz@...radead.org,
        rafael.j.wysocki@...el.com, rostedt@...dmis.org, seanjc@...gle.com,
        sedat.dilek@...il.com, syzkaller-bugs@...glegroups.com,
        tglx@...utronix.de, vitor@...saru.org, vkuznets@...hat.com,
        wanpengli@...cent.com, will@...nel.org, x86@...nel.org
Subject: Re: [syzbot] general protection fault in try_grab_compound_head

syzbot has bisected this issue to:

commit 997acaf6b4b59c6a9c259740312a69ea549cc684
Author: Mark Rutland <mark.rutland@....com>
Date:   Mon Jan 11 15:37:07 2021 +0000

    lockdep: report broken irq restoration

bisection log:  https://syzkaller.appspot.com/x/bisect.txt?x=16fbcec4300000
start commit:   3dbdb38e Merge branch 'for-5.14' of git://git.kernel.org/p..
git tree:       upstream
final oops:     https://syzkaller.appspot.com/x/report.txt?x=15fbcec4300000
console output: https://syzkaller.appspot.com/x/log.txt?x=11fbcec4300000
kernel config:  https://syzkaller.appspot.com/x/.config?x=a1fcf15a09815757
dashboard link: https://syzkaller.appspot.com/bug?extid=a3fcd59df1b372066f5a
syz repro:      https://syzkaller.appspot.com/x/repro.syz?x=11a856c4300000
C reproducer:   https://syzkaller.appspot.com/x/repro.c?x=1582c9d8300000

Reported-by: syzbot+a3fcd59df1b372066f5a@...kaller.appspotmail.com
Fixes: 997acaf6b4b5 ("lockdep: report broken irq restoration")

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