netdev - Re: [RFC PATCH 0/2] selinux: avoid nf hooks overhead when not needed

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: <20160406.142316.1728426867290841888.davem@davemloft.net>
Date:	Wed, 06 Apr 2016 14:23:16 -0400 (EDT)
From:	David Miller <davem@...emloft.net>
To:	paul@...l-moore.com
Cc:	pabeni@...hat.com, linux-security-module@...r.kernel.org,
	james.l.morris@...cle.com, agruenba@...hat.com, sds@...ho.nsa.gov,
	fw@...len.de, netdev@...r.kernel.org, selinux@...ho.nsa.gov
Subject: Re: [RFC PATCH 0/2] selinux: avoid nf hooks overhead when not
 needed

From: Paul Moore <paul@...l-moore.com>
Date: Wed, 6 Apr 2016 10:07:27 -0400

> "While marking the LSM hook structure doesn't directly affect the
> SELinux netfilter hooks, once we remove the ability to deregister the
> LSM hooks we will have no need to support deregistering netfilter
> hooks and I expect we will drop that functionality as well to help
> decrease the risk of tampering."

This is not a reasonable postiion.

The performance implications are non-trivial for using netfilter hooks
when they aren't actually needed.