netdev - Re: [PATCH 2/4] bgmac: write mac address to hardware in ndo_set_mac

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, 06 Feb 2013 16:17:33 +0100
From:	Hauke Mehrtens <hauke@...ke-m.de>
To:	Rafał Miłecki <zajec5@...il.com>
CC:	davem@...emloft.net, netdev@...r.kernel.org
Subject: Re: [PATCH 2/4] bgmac: write mac address to hardware in ndo_set_mac_address

On 02/06/2013 03:57 PM, Rafał Miłecki wrote:
> 2013/2/6 Hauke Mehrtens <hauke@...ke-m.de>:
>> The generic implementation just changes the netdev struct and does not
>> write the new mac address to the hardware or issues some command to do
>> so.
> 
> That's because generic "eth_mac_addr" allows changing MAC only when
> interface is down. And we "upload" MAC address during bringing
> interface up. So there wasn't any bug, it was just working that way :)
> 
> One question: how you tested if changing MAC with keeping interface up
> works correctly? I just don't know if simple writes to
> BGMAC_MACADDR_HIGH and BGMAC_MACADDR_LOW are enough.
> 
> If it works for you (changing MAC without stopping interface), I'm OK with that.
> 
Yes that works in promisc and non promisc mode, I did this while pinging
the device and I had no package lose.

Hauke
--
To unsubscribe from this list: send the line "unsubscribe netdev" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html