netdev - Re: [PATCH bpf 2/4] selftests: bpf: ignore RST packets for reuseport tests

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: <20200123171612.stdwtlpqibkydz2s@kafai-mbp.dhcp.thefacebook.com>
Date:   Thu, 23 Jan 2020 17:16:16 +0000
From:   Martin Lau <kafai@...com>
To:     Lorenz Bauer <lmb@...udflare.com>
CC:     Shuah Khan <shuah@...nel.org>, Alexei Starovoitov <ast@...nel.org>,
        "Daniel Borkmann" <daniel@...earbox.net>,
        Song Liu <songliubraving@...com>, "Yonghong Song" <yhs@...com>,
        Andrii Nakryiko <andriin@...com>,
        "linux-kselftest@...r.kernel.org" <linux-kselftest@...r.kernel.org>,
        "netdev@...r.kernel.org" <netdev@...r.kernel.org>,
        "bpf@...r.kernel.org" <bpf@...r.kernel.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH bpf 2/4] selftests: bpf: ignore RST packets for reuseport
 tests

On Thu, Jan 23, 2020 at 04:59:31PM +0000, Lorenz Bauer wrote:
> The reuseport tests currently suffer from a race condition: RST
> packets count towards DROP_ERR_SKB_DATA, since they don't contain
> a valid struct cmd. Tests will spuriously fail depending on whether
> check_results is called before or after the RST is processed.
> 
> Exit the BPF program early if FIN is set.
Make sense.
Is it a RST or FIN?  The earlier commit message said RST.