Re: [syzbot] [exfat?] KASAN: stack-out-of-bounds Read in exfat_nls_to_utf16

[syzbot]

syzbot has bisected this issue to:

commit d01579d590f72d2d91405b708e96f6169f24775a
Author: Ethan Ferguson <ethan.ferguson@xxxxxxxxxx>
Date:   Tue Sep 30 04:49:00 2025 +0000

    exfat: Add support for FS_IOC_{GET,SET}FSLABEL

bisection log:  https://syzkaller.appspot.com/x/bisect.txt?x=12933334580000
start commit:   6093a688a07d Merge tag 'char-misc-6.18-rc1' of git://git.k..
git tree:       upstream
final oops:     https://syzkaller.appspot.com/x/report.txt?x=11933334580000
console output: https://syzkaller.appspot.com/x/log.txt?x=16933334580000
kernel config:  https://syzkaller.appspot.com/x/.config?x=e2b03b8b7809165e
dashboard link: https://syzkaller.appspot.com/bug?extid=98cc76a76de46b3714d4
syz repro:      https://syzkaller.appspot.com/x/repro.syz?x=161a3334580000
C reproducer:   https://syzkaller.appspot.com/x/repro.c?x=13827942580000

Reported-by: syzbot+98cc76a76de46b3714d4@xxxxxxxxxxxxxxxxxxxxxxxxx
Fixes: d01579d590f7 ("exfat: Add support for FS_IOC_{GET,SET}FSLABEL")

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