Re: [syzbot] [mm?] general protection fault in __pte_offset_map_lock

[syzbot]

syzbot has bisected this issue to:

commit 1d65b771bc08cd054cf6d3766a72e113dc46d62f
Author: Hugh Dickins <hughd@xxxxxxxxxx>
Date:   Wed Jul 12 04:41:04 2023 +0000

    mm/khugepaged: retract_page_tables() without mmap or vma lock

bisection log:  https://syzkaller.appspot.com/x/bisect.txt?x=1336bfdf180000
start commit:   f03359bca01b Merge tag 'for-6.9-rc6-tag' of git://git.kern..
git tree:       upstream
final oops:     https://syzkaller.appspot.com/x/report.txt?x=10b6bfdf180000
console output: https://syzkaller.appspot.com/x/log.txt?x=1736bfdf180000
kernel config:  https://syzkaller.appspot.com/x/.config?x=3714fc09f933e505
dashboard link: https://syzkaller.appspot.com/bug?extid=f96e045d95fe10c0e800
syz repro:      https://syzkaller.appspot.com/x/repro.syz?x=1457b450980000

Reported-by: syzbot+f96e045d95fe10c0e800@xxxxxxxxxxxxxxxxxxxxxxxxx
Fixes: 1d65b771bc08 ("mm/khugepaged: retract_page_tables() without mmap or vma lock")

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