netdev - Re: [PATCH net 1/1] net/sched: act_ct: Fix flow table lookup failure with no originating ifindex

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: <20220217231603.st6tjefagkp636vq@t14s.localdomain>
Date:   Thu, 17 Feb 2022 20:16:03 -0300
From:   Marcelo Ricardo Leitner <marcelo.leitner@...il.com>
To:     Paul Blakey <paulb@...dia.com>
Cc:     dev@...nvswitch.org, netdev@...r.kernel.org,
        Jamal Hadi Salim <jhs@...atatu.com>, davem@...emloft.net,
        Jiri Pirko <jiri@...dia.com>,
        Cong Wang <xiyou.wangcong@...il.com>,
        Jakub Kicinski <kuba@...nel.org>,
        netfilter-devel@...r.kernel.org,
        Pablo Neira Ayuso <pablo@...filter.org>,
        Jozsef Kadlecsik <kadlec@...filter.org>,
        Oz Shlomo <ozsh@...dia.com>, Vlad Buslov <vladbu@...dia.com>,
        Roi Dayan <roid@...dia.com>,
        Ariel Levkovich <lariel@...dia.com>, coreteam@...filter.org
Subject: Re: [PATCH net 1/1] net/sched: act_ct: Fix flow table lookup failure
 with no originating ifindex

On Thu, Feb 17, 2022 at 11:34:24AM +0200, Paul Blakey wrote:
> After cited commit optimizted hw insertion, flow table entries are
> populated with ifindex information which was intended to only be used
> for HW offload. This tuple ifindex is hashed in the flow table key, so
> it must be filled for lookup to be successful. But tuple ifindex is only
> relevant for the netfilter flowtables (nft), so it's not filled in
> act_ct flow table lookup, resulting in lookup failure, and no SW
> offload and no offload teardown for TCP connection FIN/RST packets.
> 
> To fix this, allow flow tables that don't hash the ifindex.
> Netfilter flow tables will keep using ifindex for a more specific
> offload, while act_ct will not.
> 
> Fixes: 9795ded7f924 ("net/sched: act_ct: Fill offloading tupledx")

The fixes tag got corrupted. It should have been:
Fixes: 9795ded7f924 ("net/sched: act_ct: Fill offloading tuple iifidx")

Not sure if it needs a respin or not, but:
Reviewed-by: Marcelo Ricardo Leitner <marcelo.leitner@...il.com>

> Signed-off-by: Paul Blakey <paulb@...dia.com>
> ---