netdev - Re: [PATCH] net: prefer socket bound to interface when not in VRF

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:   Thu, 7 Oct 2021 08:10:17 -0600
From:   David Ahern <dsahern@...il.com>
To:     Jakub Kicinski <kuba@...nel.org>
Cc:     Mike Manning <mvrmanning@...il.com>,
        Netdev <netdev@...r.kernel.org>,
        Saikrishna Arcot <sarcot@...rosoft.com>
Subject: Re: [PATCH] net: prefer socket bound to interface when not in VRF

On 10/7/21 8:07 AM, Jakub Kicinski wrote:
> On Tue, 5 Oct 2021 14:03:42 +0100 Mike Manning wrote:
>> The commit 6da5b0f027a8 ("net: ensure unbound datagram socket to be
>> chosen when not in a VRF") modified compute_score() so that a device
>> match is always made, not just in the case of an l3mdev skb, then
>> increments the score also for unbound sockets. This ensures that
>> sockets bound to an l3mdev are never selected when not in a VRF.
>> But as unbound and bound sockets are now scored equally, this results
>> in the last opened socket being selected if there are matches in the
>> default VRF for an unbound socket and a socket bound to a dev that is
>> not an l3mdev. However, handling prior to this commit was to always
>> select the bound socket in this case. Reinstate this handling by
>> incrementing the score only for bound sockets. The required isolation
>> due to choosing between an unbound socket and a socket bound to an
>> l3mdev remains in place due to the device match always being made.
>> The same approach is taken for compute_score() for stream sockets.
>>
>> Fixes: 6da5b0f027a8 ("net: ensure unbound datagram socket to be chosen when not in a VRF")
>> Fixes: e78190581aff ("net: ensure unbound stream socket to be chosen when not in a VRF")
>> Signed-off-by: Mike Manning <mmanning@...tta.att-mail.com>
> 
> David A, Ack?
> 

yep, sorry, forgot about this one.

Reviewed-by: David Ahern <dsahern@...nel.org>