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Wylie" Cc: Holger =?iso-8859-1?Q?Hoffst=E4tte?= , Jamal Hadi Salim , regressions@lists.linux.dev, Jiri Pirko , netdev@vger.kernel.org, linux-kernel@vger.kernel.org, Octavian Purdila , Toke =?iso-8859-1?Q?H=F8iland-J=F8rgensen?= , stable@vger.kernel.org, Greg KH Subject: Re: [REGRESSION] 6.14.3 panic - kernel NULL pointer dereference in htb_dequeue Message-ID: References: <20250422214716.5e181523@frodo.int.wylie.me.uk> <20250423105131.7ab46a47@frodo.int.wylie.me.uk> <20250424135331.02511131@frodo.int.wylie.me.uk> <20250427204254.6ae5cd4a@frodo.int.wylie.me.uk> <20250427213548.73efc7b9@frodo.int.wylie.me.uk> <20250428223436.48529979@frodo.int.wylie.me.uk> Precedence: bulk X-Mailing-List: netdev@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20250428223436.48529979@frodo.int.wylie.me.uk> On Mon, Apr 28, 2025 at 10:34:36PM +0100, Alan J. Wylie wrote: > On Mon, 28 Apr 2025 14:02:20 -0700 > Cong Wang wrote: > > > I doubt it is related to iptables. I will try some TCP traffic on my > > side later, but I suspect this is related to the type of packets. > > > > Meanwhile, since I still can't reproduce it here, do you mind applying > > both of my patches on top of -net and test again? > > [...] > > With those patches applied, I've run 5 or 6 SpeedTests, no panics. > > There's several WARNINGS in the log, though, about one per run. My bad, acctually I reproducced it with iperf (TCP traffic) using your reproducer. I saw the warning/crash within 10 seconds. With the fix I sent out, I didn't see any after ~10 mininutes, so it should be working probably. Thanks!