linux-kernel - Re: [patch 7/8] fdmap v2

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Message-ID: <alpine.LFD.0.98.0706081206430.4205@woody.linux-foundation.org>
Date:	Fri, 8 Jun 2007 12:07:27 -0700 (PDT)
From:	Linus Torvalds <torvalds@...ux-foundation.org>
To:	Ulrich Drepper <drepper@...hat.com>
cc:	Al Viro <viro@....linux.org.uk>,
	Alan Cox <alan@...rguk.ukuu.org.uk>,
	Davide Libenzi <davidel@...ilserver.org>,
	Theodore Tso <tytso@....edu>,
	Eric Dumazet <dada1@...mosbay.com>,
	Kyle Moffett <mrmacman_g4@....com>,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Ingo Molnar <mingo@...e.hu>
Subject: Re: [patch 7/8] fdmap v2 - implement sys_socket2



On Fri, 8 Jun 2007, Ulrich Drepper wrote:
> 
> We are talking about file descriptors here.  If you're using file
> descriptors as anything other than tokens you'll find out soon enough
> that your code is broken.  The new type of file descriptors cannot be
> used as indeces and the randomization makes sure that no program by some
> fluke happens to work.

No, Uli.

You need things to be *repeatable* for debugging. No ifs, buts, or maybes 
about it.

I think truly random is a bad idea, or at the very least needs some way to 
disable it.

		Linus
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