netdev - Re: [PATCH v4 7/7] net/tcp: Don't store TCP-AO maclen on reqsk

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]

Date: Wed, 29 Nov 2023 19:10:45 +0100
From: Eric Dumazet <edumazet@...gle.com>
To: Dmitry Safonov <dima@...sta.com>
Cc: David Ahern <dsahern@...nel.org>, Paolo Abeni <pabeni@...hat.com>, 
	Jakub Kicinski <kuba@...nel.org>, "David S. Miller" <davem@...emloft.net>, linux-kernel@...r.kernel.org, 
	Dmitry Safonov <0x7f454c46@...il.com>, Francesco Ruggeri <fruggeri05@...il.com>, 
	Salam Noureddine <noureddine@...sta.com>, Simon Horman <horms@...nel.org>, netdev@...r.kernel.org
Subject: Re: [PATCH v4 7/7] net/tcp: Don't store TCP-AO maclen on reqsk

On Wed, Nov 29, 2023 at 5:57 PM Dmitry Safonov <dima@...sta.com> wrote:
>
> This extra check doesn't work for a handshake when SYN segment has
> (current_key.maclen != rnext_key.maclen). It could be amended to
> preserve rnext_key.maclen instead of current_key.maclen, but that
> requires a lookup on listen socket.
>
> Originally, this extra maclen check was introduced just because it was
> cheap. Drop it and convert tcp_request_sock::maclen into boolean
> tcp_request_sock::used_tcp_ao.
>
> Fixes: 06b22ef29591 ("net/tcp: Wire TCP-AO to request sockets")
> Signed-off-by: Dmitry Safonov <dima@...sta.com>
>

Reviewed-by: Eric Dumazet <edumazet@...gle.com>