linux-kernel - Re: [PATCH 1/2] module: allow loading module from fd

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Message-ID: <87y5kohs0v.fsf@rustcorp.com.au>
Date:	Thu, 06 Sep 2012 10:44:08 +0930
From:	Rusty Russell <rusty@...tcorp.com.au>
To:	Kees Cook <keescook@...omium.org>, linux-kernel@...r.kernel.org,
	"Linus Torvalds" <torvalds@...ux-foundation.org>
Cc:	Serge Hallyn <serge.hallyn@...onical.com>,
	James Morris <james.l.morris@...cle.com>,
	Al Viro <viro@...iv.linux.org.uk>,
	Eric Paris <eparis@...hat.com>,
	Kees Cook <keescook@...omium.org>,
	Jiri Kosina <jkosina@...e.cz>,
	linux-security-module@...r.kernel.org
Subject: Re: [PATCH 1/2] module: allow loading module from fd

Kees Cook <keescook@...omium.org> writes:
> This changes the init_module syscall so that when the first argument
> (blob address) is NULL, the second argument is used as a file descriptor
> to the module (instead of length). The third argument (module arguments)
> remains unchanged.

Do you know why Linus hates ioctls?  It's because they encourage
casual introduction of new ABIs.

I see you managed the same feat with a different system call.  It avoids
the agony of debate a new system call would entail.  Very clever.

Now do it properly.
Rusty.
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