From: Cong Wang <xiyou.wangcong@gmail.com>
To: "Alan J. Wylie" <alan@wylie.me.uk>
Cc: "Holger Hoffstätte" <holger@applied-asynchrony.com>,
"Jamal Hadi Salim" <jhs@mojatatu.com>,
regressions@lists.linux.dev, "Jiri Pirko" <jiri@resnulli.us>,
netdev@vger.kernel.org, linux-kernel@vger.kernel.org,
"Octavian Purdila" <tavip@google.com>,
"Toke Høiland-Jørgensen" <toke@redhat.com>,
stable@vger.kernel.org, "Greg KH" <gregkh@linuxfoundation.org>
Subject: Re: [REGRESSION] 6.14.3 panic - kernel NULL pointer dereference in htb_dequeue
Date: Fri, 25 Apr 2025 09:08:29 -0700 [thread overview]
Message-ID: <aAuzfQe08tFJclNJ@pop-os.localdomain> (raw)
In-Reply-To: <20250424135331.02511131@frodo.int.wylie.me.uk>
On Thu, Apr 24, 2025 at 01:53:31PM +0100, Alan J. Wylie wrote:
> > On Tue, Apr 22, 2025 at 07:20:24PM +0200, Holger Hoffstätte wrote:
>
> > Meanwhile, if you could provide a reliable (and ideally minimum)
> > reproducer, it would help me a lot to debug.
>
> I've found a reproducer. Below is a stripped down version of the shell script
> that I posted in my initial report.
>
> Running this in a 1 second loop is enough to cause the panic very quickly.
>
> It seems a bit of network traffic is needed, too.
Excellent! Now I can try it on my side instead of bothering you. :)
I will check if applying all patches here could make crash and warning
go away. And of course, I need to really understand why the crash still
happened even after the qlen check adding to htb_qlen_notify(), which is
unexpected to me.
Thanks a lot!
next prev parent reply other threads:[~2025-04-25 16:08 UTC|newest]
Thread overview: 25+ messages / expand[flat|nested] mbox.gz Atom feed top
2025-04-21 9:40 [REGRESSION] 6.14.3 panic - kernel NULL pointer dereference in htb_dequeue Alan J. Wylie
2025-04-21 11:50 ` Holger Hoffstätte
2025-04-21 12:10 ` Alan J. Wylie
2025-04-21 19:06 ` Alan J. Wylie
2025-04-21 19:47 ` Holger Hoffstätte
2025-04-21 20:09 ` Alan J. Wylie
2025-04-22 16:51 ` Alan J. Wylie
2025-04-22 17:20 ` Holger Hoffstätte
2025-04-22 20:42 ` Cong Wang
2025-04-22 20:47 ` Alan J. Wylie
2025-04-22 21:49 ` Cong Wang
2025-04-23 9:51 ` Alan J. Wylie
2025-04-23 19:32 ` Cong Wang
2025-04-24 6:53 ` Alan J. Wylie
2025-04-24 12:53 ` Alan J. Wylie
2025-04-25 16:08 ` Cong Wang [this message]
2025-04-27 19:11 ` Cong Wang
2025-04-27 19:42 ` Alan J. Wylie
2025-04-27 20:35 ` Alan J. Wylie
2025-04-28 21:02 ` Cong Wang
2025-04-28 21:34 ` Alan J. Wylie
2025-04-28 23:59 ` Cong Wang
2025-04-28 11:45 ` Greg KH
2025-04-28 12:28 ` Holger Hoffstätte
2025-04-28 23:38 ` Cong Wang
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