netdev - Re: [PATCH bpf v2 0/7] selftests/bpf: Restore test

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

Message-ID: <87360gidoo.fsf@toke.dk>
Date:   Tue, 08 Dec 2020 15:18:31 +0100
From:   Toke Høiland-Jørgensen <toke@...hat.com>
To:     Jakub Kicinski <kuba@...nel.org>
Cc:     "David S. Miller" <davem@...emloft.net>,
        Daniel Borkmann <daniel@...earbox.net>,
        Alexei Starovoitov <ast@...nel.org>,
        Andrii Nakryiko <andriin@...com>,
        Martin KaFai Lau <kafai@...com>,
        Song Liu <songliubraving@...com>, Yonghong Song <yhs@...com>,
        John Fastabend <john.fastabend@...il.com>,
        KP Singh <kpsingh@...omium.org>,
        Jesper Dangaard Brouer <hawk@...nel.org>,
        "Michael S. Tsirkin" <mst@...hat.com>,
        Romain Perier <romain.perier@...il.com>,
        Allen Pais <apais@...ux.microsoft.com>,
        Grygorii Strashko <grygorii.strashko@...com>,
        Simon Horman <simon.horman@...ronome.com>,
        "Gustavo A. R. Silva" <gustavoars@...nel.org>,
        Lorenzo Bianconi <lorenzo@...nel.org>,
        Wei Yongjun <weiyongjun1@...wei.com>,
        Jiri Benc <jbenc@...hat.com>, oss-drivers@...ronome.com,
        linux-omap@...r.kernel.org, netdev@...r.kernel.org,
        bpf@...r.kernel.org
Subject: Re: [PATCH bpf v2 0/7] selftests/bpf: Restore test_offload.py to
 working order

Toke Høiland-Jørgensen <toke@...hat.com> writes:

> This series restores the test_offload.py selftest to working order. It seems a
> number of subtle behavioural changes have crept into various subsystems which
> broke test_offload.py in a number of ways. Most of these are fairly benign
> changes where small adjustments to the test script seems to be the best fix, but
> one is an actual kernel bug that I've observed in the wild caused by a bad
> interaction between xdp_attachment_flags_ok() and the rework of XDP program
> handling in the core netdev code.
>
> Patch 1 fixes the bug by removing xdp_attachment_flags_ok(), and the reminder of
> the patches are adjustments to test_offload.py, including a new feature for
> netdevsim to force a BPF verification fail. Please see the individual patches
> for details.
>
> Changelog:
>
> v2:
> - Replace xdp_attachment_flags_ok() with a check in dev_xdp_attach()
> - Better packing of struct nsim_dev

Hi Jakub

Any feedback on v2? Would be great to get it merged before the final
5.10 release :)

-Toke