linux-kernel - Re: [syzbot] [exfat] INFO: task hung in vfs

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Message-ID: <68e5fc03.a00a0220.298cc0.0488.GAE@google.com>
Date: Tue, 07 Oct 2025 22:52:03 -0700
From: syzbot <syzbot+42986aeeddfd7ed93c8b@...kaller.appspotmail.com>
To: brauner@...nel.org, hdanton@...a.com, jack@...e.cz, linkinjeon@...nel.org, 
	linux-ext4@...r.kernel.org, linux-fsdevel@...r.kernel.org, 
	linux-kernel@...r.kernel.org, sj1557.seo@...sung.com, 
	syzkaller-bugs@...glegroups.com, viro@...iv.linux.org.uk, 
	yuezhang.mo@...y.com
Subject: Re: [syzbot] [exfat] INFO: task hung in vfs_rmdir (2)

syzbot suspects this issue was fixed by commit:

commit 79c1587b6cda74deb0c86fc7ba194b92958c793c
Author: Namjae Jeon <linkinjeon@...nel.org>
Date:   Sat Aug 30 05:44:35 2025 +0000

    exfat: validate cluster allocation bits of the allocation bitmap

bisection log:  https://syzkaller.appspot.com/x/bisect.txt?x=1695f92f980000
start commit:   4a4be1ad3a6e Revert "vfs: Delete the associated dentry whe..
git tree:       upstream
kernel config:  https://syzkaller.appspot.com/x/.config?x=47d282ddffae809f
dashboard link: https://syzkaller.appspot.com/bug?extid=42986aeeddfd7ed93c8b
syz repro:      https://syzkaller.appspot.com/x/repro.syz?x=12a5b3ec980000
C reproducer:   https://syzkaller.appspot.com/x/repro.c?x=103820f2980000

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

#syz fix: exfat: validate cluster allocation bits of the allocation bitmap

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