netdev - Re: [PATCH net-next] net: dsa: mv88e6xxx: do not flood CPU with unknown multicast

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:   Sat, 15 Jun 2019 21:28:10 +0100
From:   Russell King - ARM Linux admin <linux@...linux.org.uk>
To:     David Miller <davem@...emloft.net>
Cc:     vivien.didelot@...il.com, netdev@...r.kernel.org, andrew@...n.ch,
        f.fainelli@...il.com
Subject: Re: [PATCH net-next] net: dsa: mv88e6xxx: do not flood CPU with
 unknown multicast

On Sat, Jun 15, 2019 at 01:25:55PM -0700, David Miller wrote:
> From: Vivien Didelot <vivien.didelot@...il.com>
> Date: Wed, 12 Jun 2019 18:33:44 -0400
> 
> > The DSA ports must flood unknown unicast and multicast, but the switch
> > must not flood the CPU ports with unknown multicast, as this results
> > in a lot of undesirable traffic that the network stack needs to filter
> > in software.
> > 
> > Signed-off-by: Vivien Didelot <vivien.didelot@...il.com>
> 
> Applied.

Hi Dave,

We found this breaks IPv6, so it shouldn't have been applied (which is
the point I raised when I replied to Vivien).  Vivien is now able to
reproduce that.

I guess you need a revert patch now?

-- 
RMK's Patch system: https://www.armlinux.org.uk/developer/patches/
FTTC broadband for 0.8mile line in suburbia: sync at 12.1Mbps down 622kbps up
According to speedtest.net: 11.9Mbps down 500kbps up