netdev - Re: 6.1: possible bug with netfilter conntrack?

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] [day] [month] [year] [list]

Message-ID: <Y8FeT7pAUDeILb/X@shell.armlinux.org.uk>
Date:   Fri, 13 Jan 2023 13:36:15 +0000
From:   "Russell King (Oracle)" <linux@...linux.org.uk>
To:     Florian Westphal <fw@...len.de>
Cc:     netdev@...r.kernel.org, netfilter-devel@...r.kernel.org,
        coreteam@...filter.org
Subject: Re: 6.1: possible bug with netfilter conntrack?

On Fri, Jan 13, 2023 at 01:56:29PM +0100, Florian Westphal wrote:
> Right, this is silly.  I'll see about this; the rst packet
> bypasses conntrack because nf_send_reset attaches the exising
> entry of the packet its replying to -- tcp conntrack gets skipped for
> the generated RST.
> 
> But this is also the case in 5.16, so no idea why this is surfacing now.

Maybe it's just down to a change in the traffic characteristics that
now makes it a problem, and it appearing after upgrading to 6.1 is
just coincidence?

-- 
RMK's Patch system: https://www.armlinux.org.uk/developer/patches/
FTTP is here! 40Mbps down 10Mbps up. Decent connectivity at last!