linux-kernel - Re: network interfaces called "all", "default" or "config"

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: <53CFCD26.1020409@infradead.org>
Date:	Wed, 23 Jul 2014 07:56:38 -0700
From:	Randy Dunlap <rdunlap@...radead.org>
To:	Stephane Chazelas <stephane.chazelas@...il.com>,
	linux-kernel@...r.kernel.org,
	"netdev@...r.kernel.org" <netdev@...r.kernel.org>
Subject: Re: network interfaces called "all", "default" or "config"

[adding netdev]

On 07/23/2014 04:33 AM, Stephane Chazelas wrote:
> Hiya,
> 
> you may want to forbid the creation of interfaces whose name is
> one of the special files in /proc/net and /proc/sys.
> 
> I can see some characters (like space, tab, newline, slash,
> dot...) are alread forbidden in interface names (EINVAL), but
> one can do for instance:
> 
> sudo ip link add link eth0 all type vlan id 2
> sudo ip link add link eth0 default type vlan id 3
> sudo ip link add link eth0 config type vlan id 4
> 
> Interestingly, after you add a "all" or "default", the
> corresponding /proc/sys/net/ipv[46]/conf/(all|default) become
> empty, and remain so even after you've removed the interface.
> 
> Adding an interface called "config" masks /proc/net/vlan/config
> 
> (tested with 3.14-1-amd64 on debian)
> 


-- 
~Randy
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/