linux-kernel - Re: Linux6.14-rc5: INFO: task hung in register_netdevice_notifier

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Message-ID: <Z9cCQ1huViMjZkvS@mini-arch>
Date: Sun, 16 Mar 2025 09:54:27 -0700
From: Stanislav Fomichev <stfomichev@...il.com>
To: ffhgfv <xnxc22xnxc22@...com>
Cc: davem <davem@...emloft.net>, edumazet <edumazet@...gle.com>,
	kuba <kuba@...nel.org>, pabeni <pabeni@...hat.com>,
	horms <horms@...nel.org>, kuniyu <kuniyu@...zon.com>,
	bigeasy <bigeasy@...utronix.de>, jdamato <jdamato@...tly.com>,
	"aleksander.lobakin" <aleksander.lobakin@...el.com>,
	netdev <netdev@...r.kernel.org>,
	linux-kernel <linux-kernel@...r.kernel.org>
Subject: Re: Linux6.14-rc5:  INFO: task hung in
 register_netdevice_notifier_net

On 03/16, ffhgfv wrote:
> Hello, I found a bug titled "   INFO: task hung in register_netdevice_notifier_net  " with modified syzkaller in the Linux6.14-rc5.
> If you fix this issue, please add the following tag to the commit:  Reported-by: Jianzhou Zhao <xnxc22xnxc22@...com>,    xingwei lee <xrivendell7@...il.com>, Zhizhuo Tang <strforexctzzchange@...mail.com>

Haven't looked that deep, but it seems to involve a tunneling device,
so I wonder whether it's gonna be fixed by:
- https://patchwork.kernel.org/project/netdevbpf/patch/20250312190513.1252045-2-sdf@fomichev.me/
- https://patchwork.kernel.org/project/netdevbpf/patch/20250312190513.1252045-3-sdf@fomichev.me/

Do you have a repro? Can you rerun with the above fixes and enable
lockdep?