netdev - Re: Re: [PATCH 1/2] bpf: support access variable length array of integer type

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [day] [month] [year] [list]

Date:   Tue, 18 Apr 2023 10:53:59 +0800
From:   Feng Zhou <zhoufeng.zf@...edance.com>
To:     Alexei Starovoitov <alexei.starovoitov@...il.com>
Cc:     martin.lau@...ux.dev, ast@...nel.org, daniel@...earbox.net,
        andrii@...nel.org, song@...nel.org, yhs@...com,
        john.fastabend@...il.com, kpsingh@...nel.org, sdf@...gle.com,
        haoluo@...gle.com, jolsa@...nel.org, davem@...emloft.net,
        edumazet@...gle.com, kuba@...nel.org, pabeni@...hat.com,
        mykolal@...com, shuah@...nel.org, bpf@...r.kernel.org,
        linux-kernel@...r.kernel.org, netdev@...r.kernel.org,
        linux-kselftest@...r.kernel.org, yangzhenze@...edance.com,
        wangdongdong.6@...edance.com, zhouchengming@...edance.com
Subject: Re: Re: [PATCH 1/2] bpf: support access variable length array of
 integer type

在 2023/4/18 08:08, Alexei Starovoitov 写道:
> On Mon, Apr 17, 2023 at 04:07:48PM +0800, Feng zhou wrote:
>> From: Feng Zhou <zhoufeng.zf@...edance.com>
>>
>> After this commit:
>> bpf: Support variable length array in tracing programs (9c5f8a1008a1)
>> Trace programs can access variable length array, but for structure
>> type. This patch adds support for integer type.
>>
>> Example:
>> Hook load_balance
>> struct sched_domain {
>> 	...
>> 	unsigned long span[];
>> }
>>
>> The access: sd->span[0].
> The use case makes sense.
> Please add it as a selftest. Either combine it with patch 2 or another patch 3.
> and then resubmit.
> Make sure to use [PATCH bpf-next] subject, so BPF CI knows how to test it.

Will do, thanks.