linux-kernel - Re: [PATCH bpf-next 2/2] bpf: Add show_fdinfo for kprobe

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Message-ID: <00a22161-1e40-4ec0-be4f-e2c5dadbfe0b@linux.dev>
Date: Fri, 13 Jun 2025 10:52:41 +0800
From: Tao Chen <chen.dylane@...ux.dev>
To: Alexei Starovoitov <alexei.starovoitov@...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 <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>,
 bpf <bpf@...r.kernel.org>, LKML <linux-kernel@...r.kernel.org>,
 linux-trace-kernel <linux-trace-kernel@...r.kernel.org>
Subject: Re: [PATCH bpf-next 2/2] bpf: Add show_fdinfo for kprobe_multi

在 2025/6/13 00:01, Alexei Starovoitov 写道:
> On Thu, Jun 12, 2025 at 4:56 AM Tao Chen <chen.dylane@...ux.dev> wrote:
>>
>> Show kprobe_multi link info with fdinfo, the info as follows:
>>
>> link_type:      kprobe_multi
>> link_id:        4
>> prog_tag:       279dd9c09dfbc757
>> prog_id:        30
>> type:   kprobe_multi
>> func_cnt:       8
>> missed: 0
>> addr:   0xffffffff81ecb1e0
> 
> fdinfo shouldn't print kernel addresses.
> It defeats kaslr
> 

How about print the function name corresponding of the address, or
don't show the addr info.

> pw-bot: cr


-- 
Best Regards
Tao Chen