Re: [syzbot] [ntfs3?] KASAN: slab-use-after-free Read in chrdev_open

[syzbot]

syzbot has bisected this issue to:

commit ef9297007e9904588682699e618c56401f61d1c2
Author: Kari Argillander <kari.argillander@xxxxxxxxx>
Date:   Thu Sep 2 15:40:49 2021 +0000

    fs/ntfs3: Make binary search to search smaller chunks in beginning

bisection log:  https://syzkaller.appspot.com/x/bisect.txt?x=144f18b0980000
start commit:   e33c4963bf53 Merge tag 'nfsd-6.9-5' of git://git.kernel.or..
git tree:       upstream
final oops:     https://syzkaller.appspot.com/x/report.txt?x=164f18b0980000
console output: https://syzkaller.appspot.com/x/log.txt?x=124f18b0980000
kernel config:  https://syzkaller.appspot.com/x/.config?x=5a05c230e142f2bc
dashboard link: https://syzkaller.appspot.com/bug?extid=5d34cc6474499a5ff516
syz repro:      https://syzkaller.appspot.com/x/repro.syz?x=11655ed8980000
C reproducer:   https://syzkaller.appspot.com/x/repro.c?x=12499380980000

Reported-by: syzbot+5d34cc6474499a5ff516@xxxxxxxxxxxxxxxxxxxxxxxxx
Fixes: ef9297007e99 ("fs/ntfs3: Make binary search to search smaller chunks in beginning")

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