linux-kernel - Re: [syzbot] [exfat?] KASAN: stack-out-of-bounds Read in exfat_nls_to

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Message-ID: <6919b97b.a70a0220.3124cb.007c.GAE@google.com>
Date: Sun, 16 Nov 2025 03:46:03 -0800
From: syzbot <syzbot+29934710e7fb9cb71f33@...kaller.appspotmail.com>
To: aha310510@...il.com, eadavis@...com, ethan.ferguson@...ier.com, 
	linkinjeon@...nel.org, linux-fsdevel@...r.kernel.org, 
	linux-kernel@...r.kernel.org, sj1557.seo@...sung.com, 
	syzkaller-bugs@...glegroups.com, yuezhang.mo@...y.com
Subject: Re: [syzbot] [exfat?] KASAN: stack-out-of-bounds Read in exfat_nls_to_ucs2

syzbot suspects this issue was fixed by commit:

commit 2d8636119b92970ba135c3c4da87d24dbfdeb8ca
Author: Jeongjun Park <aha310510@...il.com>
Date:   Wed Oct 15 07:34:54 2025 +0000

    exfat: fix out-of-bounds in exfat_nls_to_ucs2()

bisection log:  https://syzkaller.appspot.com/x/bisect.txt?x=17f5a212580000
start commit:   67029a49db6c Merge tag 'trace-v6.18-3' of git://git.kernel..
git tree:       upstream
kernel config:  https://syzkaller.appspot.com/x/.config?x=1921939e847e6e87
dashboard link: https://syzkaller.appspot.com/bug?extid=29934710e7fb9cb71f33
syz repro:      https://syzkaller.appspot.com/x/repro.syz?x=11aa067c580000
C reproducer:   https://syzkaller.appspot.com/x/repro.c?x=12ba29e2580000

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

#syz fix: exfat: fix out-of-bounds in exfat_nls_to_ucs2()

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