Re: [syzbot] general protection fault in try_grab_compound_head

[syzbot]

syzbot has bisected this issue to:

commit 997acaf6b4b59c6a9c259740312a69ea549cc684
Author: Mark Rutland <mark.rutland@xxxxxxx>
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@xxxxxxxxxxxxxxxxxxxxxxxxx
Fixes: 997acaf6b4b5 ("lockdep: report broken irq restoration")

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