netdev - Re: [PATCH] LSM: Add security_socket_post_accept() and security_socket_post_recv

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Date:	Thu, 23 Apr 2009 16:47:22 +0200
From:	Samir Bellabes <sam@...ack.fr>
To:	Tetsuo Handa <penguin-kernel@...ove.SAKURA.ne.jp>
Cc:	davem@...emloft.net, paul.moore@...com,
	linux-security-module@...r.kernel.org, netdev@...r.kernel.org
Subject: Re: [PATCH] LSM: Add security_socket_post_accept() and security_socket_post_recv_datagram().

Tetsuo Handa <penguin-kernel@...ove.SAKURA.ne.jp> writes:

> There could be some programs which get confused by accept()/recvmsg() returning
> an error when poll() said "connections are ready" or "datagrams are ready".
> If we find such programs, we can tell TOMOYO to disable filtering for such
> programs.

Hello Tetsuo,

this will introduce a way to bypass the security system (?)

If TOMOYO won't filter such programs, people may add this "poll()"
feature to their code, in order to escape the security system.

I think it's strange for a security system to allow some programs
because of specific code issue, and not because of security reasons.

sam
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