Re: [syzbot] [mm?] KASAN: slab-out-of-bounds Read in mt_validate_nulls

[syzbot]

syzbot suspects this issue was fixed by commit:

commit ae80b404198434e49e903dc3b1ba83e2c7bb3ee2
Author: Linus Torvalds <torvalds@xxxxxxxxxxxxxxxxxxxx>
Date:   Mon Jul 3 17:08:50 2023 +0000

    mm: validate the mm before dropping the mmap lock

bisection log:  https://syzkaller.appspot.com/x/bisect.txt?x=17b0da65a80000
start commit:   a901a3568fd2 Merge tag 'iomap-6.5-merge-1' of git://git.ke..
git tree:       upstream
kernel config:  https://syzkaller.appspot.com/x/.config?x=7406f415f386e786
dashboard link: https://syzkaller.appspot.com/bug?extid=609e63261638ff3d5436
syz repro:      https://syzkaller.appspot.com/x/repro.syz?x=10342968a80000
C reproducer:   https://syzkaller.appspot.com/x/repro.c?x=17d4cf70a80000

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

#syz fix: mm: validate the mm before dropping the mmap lock

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