netdev - Re: vxlan mac address generation

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, 15 Apr 2020 13:21:31 +0300
From:   Ido Schimmel <idosch@...sch.org>
To:     Russell Strong <russell@...ong.id.au>
Cc:     Stephen Hemminger <stephen@...workplumber.org>,
        netdev@...r.kernel.org
Subject: Re: vxlan mac address generation

On Wed, Apr 15, 2020 at 05:28:00PM +1000, Russell Strong wrote:
> I tried debian ( 4.19.0-8-amd64 ) and got the same result as you.  I am
> using Fedora 31 ( 5.5.15-200.fc31.x86_64 ).  I have discovered a
> difference:
> 
> On fedora /sys/class/net/v0/addr_assign_type = 3
> On debian /sys/class/net/v0/addr_assign_type = 1
> 
> The debian value is what I would expect (NET_ADDR_RANDOM).  I thought
> addr_assign_type was controlled by the driver.  Do you think this could
> be a Fedora bug, or perhaps something has changed between 4.19 and 5.5?

I assume you're using systemd 242 or later. I also hit this issue.
Documented the solution here:

https://github.com/Mellanox/mlxsw/wiki/Persistent-Configuration#required-changes-to-macaddresspolicy