netdev - Re: [PATCH net 1/1] net: stmmac: fix tc flower deletion for VLAN priority Rx steering

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Message-ID: <YbMbEclmABxiozb/@linutronix.de>
Date:   Fri, 10 Dec 2021 10:17:05 +0100
From:   Sebastian Andrzej Siewior <bigeasy@...utronix.de>
To:     Ong Boon Leong <boon.leong.ong@...el.com>
Cc:     Giuseppe Cavallaro <peppe.cavallaro@...com>,
        Alexandre Torgue <alexandre.torgue@...com>,
        Jose Abreu <joabreu@...opsys.com>,
        "David S . Miller" <davem@...emloft.net>,
        Jakub Kicinski <kuba@...nel.org>,
        Maxime Coquelin <mcoquelin.stm32@...il.com>,
        alexandre.torgue@...s.st.com, Kurt Kanzenbach <kurt@...utronix.de>,
        netdev@...r.kernel.org, linux-stm32@...md-mailman.stormreply.com,
        linux-arm-kernel@...ts.infradead.org
Subject: Re: [PATCH net 1/1] net: stmmac: fix tc flower deletion for VLAN
 priority Rx steering

On 2021-12-09 21:03:35 [+0800], Ong Boon Leong wrote:
…
> From dmesg, we will observe kernel NULL pointer ooops
> 
> [  197.170464] BUG: kernel NULL pointer dereference, address: 0000000000000000
…
> [  197.171367] ---[ end trace 8b8d1c617c39093d ]---

Could the huge amount of backtrace be parsed and converted into the
needed information. That could be why is the NULL pointer happening. The
notation of the call chain makes sense if important to the issue and not
obvious. Also a nice follow-up how the issue is addressed.

Sebastian