netdev - Re: [RFC PATCH bpf 1/2] bpf: Fix memory access tags in helper prototypes

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Message-Id: <0C2A0E4A-F35B-4247-B0C4-42C52C6786B7@gmail.com>
Date: Tue, 23 Dec 2025 11:22:26 +0800
From: Zesen Liu <ftyghome@...il.com>
To: Amery Hung <ameryhung@...il.com>
Cc: Alexei Starovoitov <ast@...nel.org>,
 Daniel Borkmann <daniel@...earbox.net>,
 Andrii Nakryiko <andrii@...nel.org>,
 Martin KaFai Lau <martin.lau@...ux.dev>,
 Eduard Zingerman <eddyz87@...il.com>,
 Song Liu <song@...nel.org>,
 Yonghong Song <yonghong.song@...ux.dev>,
 John Fastabend <john.fastabend@...il.com>,
 KP Singh <kpsingh@...nel.org>,
 Stanislav Fomichev <sdf@...ichev.me>,
 Hao Luo <haoluo@...gle.com>,
 Jiri Olsa <jolsa@...nel.org>,
 Matt Bobrowski <mattbobrowski@...gle.com>,
 Steven Rostedt <rostedt@...dmis.org>,
 Masami Hiramatsu <mhiramat@...nel.org>,
 Mathieu Desnoyers <mathieu.desnoyers@...icios.com>,
 "David S. Miller" <davem@...emloft.net>,
 Eric Dumazet <edumazet@...gle.com>,
 Jakub Kicinski <kuba@...nel.org>,
 Paolo Abeni <pabeni@...hat.com>,
 Simon Horman <horms@...nel.org>,
 Daniel Xu <dxu@...uu.xyz>,
 Shuah Khan <shuah@...nel.org>,
 bpf@...r.kernel.org,
 linux-kernel@...r.kernel.org,
 linux-trace-kernel@...r.kernel.org,
 netdev@...r.kernel.org,
 linux-kselftest@...r.kernel.org,
 Shuran Liu <electronlsr@...il.com>,
 Peili Gao <gplhust955@...il.com>,
 Haoran Ni <haoran.ni.cs@...il.com>
Subject: Re: [RFC PATCH bpf 1/2] bpf: Fix memory access tags in helper
 prototypes

> On Dec 23, 2025, at 03:29, Amery Hung <ameryhung@...il.com> wrote:
> 
> I did a quick search and there is one helper slipping. We should also
> annotate arg1_type of bpf_kallsyms_lookup_name with MEM_RDONLY.

Good catch, thanks! I will address this once we reach a conclusion
on the ARG_PTR_TO_MEM semantics.

Thanks,
Zesen Liu