linux-kernel - Re: [syzbot] [ext4?] [overlayfs?] WARNING in file_seek_cur_needs_f

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Message-ID: <1465443.1744059739@warthog.procyon.org.uk>
Date: Mon, 07 Apr 2025 22:02:19 +0100
From: David Howells <dhowells@...hat.com>
To: syzbot <syzbot+4036165fc595a74b09b2@...kaller.appspotmail.com>
Cc: dhowells@...hat.com, adilger.kernel@...ger.ca, amir73il@...il.com,
    linux-ext4@...r.kernel.org, linux-kernel@...r.kernel.org,
    linux-unionfs@...r.kernel.org, miklos@...redi.hu,
    syzkaller-bugs@...glegroups.com, tytso@....edu
Subject: Re: [syzbot] [ext4?] [overlayfs?] WARNING in file_seek_cur_needs_f_lock

syzbot <syzbot+4036165fc595a74b09b2@...kaller.appspotmail.com> wrote:

> 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

I've seen this in a bunch of different syzbot tests also where, as far as I
can tell, the patch I've offered fixes the actual bug.

David