linux-kernel - Re: BUG: WARNING in __kernfs

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Message-ID: <2024082917-yield-winnings-31dd@gregkh>
Date: Thu, 29 Aug 2024 08:29:27 +0200
From: Greg KH <gregkh@...uxfoundation.org>
To: Xingyu Li <xli399@....edu>
Cc: tj@...nel.org, linux-kernel@...r.kernel.org, Yu Hao <yhao016@....edu>
Subject: Re: BUG: WARNING in __kernfs_remove

On Wed, Aug 28, 2024 at 03:03:33PM -0700, Xingyu Li wrote:
> Hi,
> 
> We found a bug in Linux 6.10 using syzkaller. It is possibly a logic bug.
> The bug report is as follows, but unfortunately there is no generated
> syzkaller reproducer.

A reproducer would be great, otherwise there's not much we can do here,
sorry.

> 
> Bug report:
> 
> team0 (unregistering): Port device team_slave_0 removed
> netdevsim netdevsim0 netdevsim3 (unregistering): unset [1, 0] type 2
> family 0 port 6081 - 0
> ------------[ cut here ]------------
> WARNING: CPU: 0 PID: 1090 at fs/kernfs/dir.c:41

So this is a lockdep warning?

Patches to resolve issues like this are greatly apprecaited, "raw"
syzbot reports are not much good given that we are drowning in them.

thanks,

greg k-h