linux-kernel - Re: [PATCH] nextfd(2)

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Message-ID: <20120402010937.38b33576@pyramind.ukuu.org.uk>
Date:	Mon, 2 Apr 2012 01:09:37 +0100
From:	Alan Cox <alan@...rguk.ukuu.org.uk>
To:	Konstantin Khlebnikov <khlebnikov@...nvz.org>
Cc:	Alexey Dobriyan <adobriyan@...il.com>,
	"akpm@...ux-foundation.org" <akpm@...ux-foundation.org>,
	"viro@...iv.linux.org.uk" <viro@...iv.linux.org.uk>,
	"torvalds@...ux-foundation.org" <torvalds@...ux-foundation.org>,
	"drepper@...il.com" <drepper@...il.com>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	"linux-fsdevel@...r.kernel.org" <linux-fsdevel@...r.kernel.org>
Subject: Re: [PATCH] nextfd(2)

> Can we add "pid" argument to be able to search next fd in other task?
> Together with sys_kcmp() this will be very useful for checkpoint/restore.

That would raise all sorts of security questions unless protected, plus
its got races. If you want to do that and you have the rights you can do
it via procfs anyway.

Alan
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