netdev - Re: [RFC v3 01/10] lsm: add security_socket

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Message-ID: <87wri73i6e.fsf@synack.fr>
Date:	Tue, 03 May 2011 17:41:45 +0200
From:	Samir Bellabes <sam@...ack.fr>
To:	Tetsuo Handa <penguin-kernel@...ove.SAKURA.ne.jp>
Cc:	linux-security-module@...r.kernel.org,
	linux-kernel@...r.kernel.org, netdev@...r.kernel.org,
	netfilter-devel@...r.kernel.org, hadi@...erus.ca, kaber@...sh.net,
	zbr@...emap.net, root@...aldomain.pl
Subject: Re: [RFC v3 01/10] lsm: add security_socket_closed()

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

> Samir Bellabes wrote:
>> Allow a module to update security informations when a socket is closed.
> Is security_inode_free() too late for doing it?
>
> static void ccs_inode_free_security(struct inode *inode)
> {
>         if (inode->i_sb && inode->i_sb->s_magic == SOCKFS_MAGIC)
>                 ccs_update_socket_tag(inode, 0);
> }

I don't think it's too late.
But in sock_close() we are sure to deal with a inode which is a socket.

In ccs_inode_free_security(), we need to add small to check if the inode
is a socket or something else.

sam
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