From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail6.bemta12.messagelabs.com (mail6.bemta12.messagelabs.com [216.82.250.247]) by kanga.kvack.org (Postfix) with ESMTP id 33DFB9000BD for ; Tue, 27 Sep 2011 15:17:54 -0400 (EDT) Received: by bkbzs2 with SMTP id zs2so9673916bkb.14 for ; Tue, 27 Sep 2011 12:17:51 -0700 (PDT) Date: Tue, 27 Sep 2011 23:16:58 +0400 From: Vasiliy Kulikov Subject: Re: [PATCH 1/2] mm: restrict access to slab files under procfs and sysfs Message-ID: <20110927191658.GB4820@albatros> References: <20110927175453.GA3393@albatros> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: Sender: owner-linux-mm@kvack.org List-ID: To: Christoph Lameter Cc: kernel-hardening@lists.openwall.com, Pekka Enberg , Matt Mackall , linux-mm@kvack.org, Kees Cook , Dave Hansen , Valdis.Kletnieks@vt.edu, Linus Torvalds , David Rientjes , Alan Cox , linux-kernel@vger.kernel.org On Tue, Sep 27, 2011 at 13:08 -0500, Christoph Lameter wrote: > Possible candidates: > > christoph@oldy:~/n/linux-2.6$ grep proc_create mm/* > mm/swapfile.c: proc_create("swaps", 0, NULL, &proc_swaps_operations); > mm/vmstat.c: proc_create("buddyinfo", S_IRUGO, NULL, &fragmentation_file_operations); > mm/vmstat.c: proc_create("pagetypeinfo", S_IRUGO, NULL, &pagetypeinfo_file_ops); > mm/vmstat.c: proc_create("vmstat", S_IRUGO, NULL, &proc_vmstat_file_operations); > mm/vmstat.c: proc_create("zoneinfo", S_IRUGO, NULL, &proc_zoneinfo_file_operations); > > vmstat and zoneinfo in particular give similar information to what is > revealed through the slab proc files. Do you know whether these files are actively used? I don't want to break tools like "free" or "top". In this case we'll have to discover another way to limit this information. Thank you! -- Vasiliy Kulikov http://www.openwall.com - bringing security into open computing environments -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@kvack.org. For more info on Linux MM, see: http://www.linux-mm.org/ . Fight unfair telecom internet charges in Canada: sign http://stopthemeter.ca/ Don't email: email@kvack.org