Re: [syzbot] [btrfs?] general protection fault in btrfs_search_slot

[syzbot]

syzbot has bisected this issue to:

commit 42437a6386ffeaaf200731e73d723ea491f3fe7d
Author: Josef Bacik <josef@xxxxxxxxxxxxxx>
Date:   Fri Oct 16 15:29:18 2020 +0000

    btrfs: introduce mount option rescue=ignorebadroots

bisection log:  https://syzkaller.appspot.com/x/bisect.txt?x=178b4d5f980000
start commit:   3e5e6c9900c3 Merge tag 'nfsd-6.12-3' of git://git.kernel.o..
git tree:       upstream
final oops:     https://syzkaller.appspot.com/x/report.txt?x=144b4d5f980000
console output: https://syzkaller.appspot.com/x/log.txt?x=104b4d5f980000
kernel config:  https://syzkaller.appspot.com/x/.config?x=f527353e21e067e8
dashboard link: https://syzkaller.appspot.com/bug?extid=3030e17bd57a73d39bd7
syz repro:      https://syzkaller.appspot.com/x/repro.syz?x=14bc8d5f980000
C reproducer:   https://syzkaller.appspot.com/x/repro.c?x=16ba6b40580000

Reported-by: syzbot+3030e17bd57a73d39bd7@xxxxxxxxxxxxxxxxxxxxxxxxx
Fixes: 42437a6386ff ("btrfs: introduce mount option rescue=ignorebadroots")

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