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Date: Wed, 3 Jan 2024 18:04:26 -0800
From: Jakub Kicinski <kuba@kernel.org>
To: Kui-Feng Lee <sinquersw@gmail.com>
Cc: netdev@vger.kernel.org, victor@mojatatu.com, jhs@mojatatu.com,
 xiyou.wangcong@gmail.com, jiri@resnulli.us, pctammela@mojatatu.com, "David
 S. Miller" <davem@davemloft.net>, Andrii Nakryiko <andrii@kernel.org>,
 Alexei Starovoitov <ast@kernel.org>, Martin KaFai Lau
 <martin.lau@linux.dev>, Kernel Team <kernel-team@meta.com>
Subject: Re: net/sched - kernel crashes when replacing a qdisc node.
Message-ID: <20240103180426.2db116ea@kernel.org>
In-Reply-To: <ce8d3e55-b8bc-409c-ace9-5cf1c4f7c88e@gmail.com>
References: <ce8d3e55-b8bc-409c-ace9-5cf1c4f7c88e@gmail.com>
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On Wed, 3 Jan 2024 17:41:54 -0800 Kui-Feng Lee wrote:
> The kernel crashes when running selftests/bpf/prog_tests/lwt_reroute.c. 
> We got the error message at end of this post.
> 
> It happens when lwt_reroute.c running the shell command
> 
>    tc qdisc replace dev tun0 root fq limit 5 flow_limit 5
> 
> The kernel crashes at the line
> 
>    block = cl_ops->tcf_block(sch, TC_H_MIN_INGRESS, NULL);

This is the same as
https://lore.kernel.org/all/20231231172320.245375-1-victor@mojatatu.com/#r
right?