linux-kernel - Re: [PATCH net-next v3 5/9] net: tcp: make tcp_rcv_state

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: <CANn89i+NV1DgxaQbqPu2o0Du-94gDkM8DUrX_DK7=AGqvvPKdg@mail.gmail.com>
Date:   Fri, 10 Jun 2022 01:56:25 -0700
From:   Eric Dumazet <edumazet@...gle.com>
To:     Menglong Dong <menglong8.dong@...il.com>
Cc:     Steven Rostedt <rostedt@...dmis.org>,
        Ingo Molnar <mingo@...hat.com>,
        David Miller <davem@...emloft.net>,
        Hideaki YOSHIFUJI <yoshfuji@...ux-ipv6.org>,
        David Ahern <dsahern@...nel.org>,
        Jakub Kicinski <kuba@...nel.org>,
        Paolo Abeni <pabeni@...hat.com>,
        Menglong Dong <imagedong@...cent.com>,
        Martin KaFai Lau <kafai@...com>,
        Talal Ahmad <talalahmad@...gle.com>,
        Kees Cook <keescook@...omium.org>,
        Dongli Zhang <dongli.zhang@...cle.com>,
        LKML <linux-kernel@...r.kernel.org>,
        netdev <netdev@...r.kernel.org>,
        Jiang Biao <benbjiang@...cent.com>,
        Hao Peng <flyingpeng@...cent.com>
Subject: Re: [PATCH net-next v3 5/9] net: tcp: make tcp_rcv_state_process()
 return drop reason

On Thu, Jun 9, 2022 at 8:45 PM <menglong8.dong@...il.com> wrote:
>
> From: Menglong Dong <imagedong@...cent.com>
>
> For now, the return value of tcp_rcv_state_process() is treated as bool.
> Therefore, we can make it return the reasons of the skb drops.
>
> Meanwhile, the return value of tcp_child_process() comes from
> tcp_rcv_state_process(), make it drop reasons by the way.
>
> The new drop reason SKB_DROP_REASON_TCP_LINGER is added for skb dropping
> out of TCP linger.
>
> Reviewed-by: Jiang Biao <benbjiang@...cent.com>
> Reviewed-by: Hao Peng <flyingpeng@...cent.com>
> Signed-off-by: Menglong Dong <imagedong@...cent.com>
> v3:
> - instead SKB_DROP_REASON_TCP_ABORTONDATA with SKB_DROP_REASON_TCP_LINGER
> ---
>  include/net/dropreason.h |  6 ++++++
>  include/net/tcp.h        |  8 +++++---
>  net/ipv4/tcp_input.c     | 36 ++++++++++++++++++++----------------
>  net/ipv4/tcp_ipv4.c      | 20 +++++++++++++-------
>  net/ipv4/tcp_minisocks.c | 11 ++++++-----
>  net/ipv6/tcp_ipv6.c      | 19 ++++++++++++-------
>  6 files changed, 62 insertions(+), 38 deletions(-)
>

I am sorry, this patch is too invasive, and will make future bug fix
backports a real nightmare.