linux-kernel - Re: [syzbot] [netfs?] INFO: task hung in netfs_unbuffered_write

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Message-ID: <67e6edf2.050a0220.2f20fe.0002.GAE@google.com>
Date: Fri, 28 Mar 2025 11:44:02 -0700
From: syzbot <syzbot+62262fdc0e01d99573fc@...kaller.appspotmail.com>
To: brauner@...nel.org, dhowells@...hat.com, jack@...e.cz, jlayton@...nel.org, 
	kprateek.nayak@....com, linux-fsdevel@...r.kernel.org, 
	linux-kernel@...r.kernel.org, mjguzik@...il.com, netfs@...ts.linux.dev, 
	oleg@...hat.com, swapnil.sapkal@....com, syzkaller-bugs@...glegroups.com, 
	viro@...iv.linux.org.uk
Subject: Re: [syzbot] [netfs?] INFO: task hung in netfs_unbuffered_write_iter

Hello,

syzbot has tested the proposed patch but the reproducer is still triggering an issue:
unregister_netdevice: waiting for DEV to become free

unregister_netdevice: waiting for batadv0 to become free. Usage count = 3

Tested on:

commit:         c7fffb8c netfs: Fix wait/wake to be consistent about t..
git tree:       git://git.kernel.org/pub/scm/linux/kernel/git/dhowells/linux-fs.git netfs-fixes
console output: https://syzkaller.appspot.com/x/log.txt?x=15722a4c580000
kernel config:  https://syzkaller.appspot.com/x/.config?x=95c3bbe7ce8436a7
dashboard link: https://syzkaller.appspot.com/bug?extid=62262fdc0e01d99573fc
compiler:       gcc (Debian 12.2.0-14) 12.2.0, GNU ld (GNU Binutils for Debian) 2.40

Note: no patches were applied.