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

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Message-ID: <46686810.6030805@redhat.com>
Date:	Thu, 07 Jun 2007 13:18:24 -0700
From:	Ulrich Drepper <drepper@...hat.com>
To:	Eric Dumazet <dada1@...mosbay.com>
CC:	Davide Libenzi <davidel@...ilserver.org>,
	Kyle Moffett <mrmacman_g4@....com>,
	Alan Cox <alan@...rguk.ukuu.org.uk>,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
	Linus Torvalds <torvalds@...ux-foundation.org>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Ingo Molnar <mingo@...e.hu>
Subject: Re: [patch 7/8] fdmap v2 - implement sys_socket2

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Eric Dumazet wrote:
> I am afraid randomization wont really work if /sbin/init or /bin/bash
> for example uses one (or more) unseq fd :
> The 'random base' will be propagated at fork()/exec() time ?

The base certainly should be reset o fork.  Yes, this might expand the
region in which descriptors are allocated due to inherited descriptors.
 But I consider this the application's problem and it usually is not
really an issue.  Apps have to explicitly request using the new
descriptors and they can use CLOEXEC (CLOFORK) correctly.

- --
➧ Ulrich Drepper ➧ Red Hat, Inc. ➧ 444 Castro St ➧ Mountain View, CA ❖
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