From: Andrea Arcangeli <andrea@suse.de>
To: Chris Wright <chrisw@osdl.org>
Cc: Arjan van de Ven <arjanv@redhat.com>,
linux-kernel@vger.kernel.org, riel@redhat.com, akpm@osdl.org
Subject: Re: [patch] mlock-as-nonroot revisted
Date: Fri, 30 Jul 2004 04:09:10 +0200 [thread overview]
Message-ID: <20040730020910.GA30369@dualathlon.random> (raw)
In-Reply-To: <20040729185215.Q1973@build.pdx.osdl.net>
On Thu, Jul 29, 2004 at 06:52:15PM -0700, Chris Wright wrote:
> 1) hugetlb accounting is not done. so it's only simple change to checking
> permission, but the acutal usage is not tracked (gets back to problem
> andrea pointed out). with this patch, wouldn't !capable(CAP_IPC_LOCK)
> && rlim[RLIMIT_MEMLOCK].rlim_cur == 1 be enough to get all the hugepages
> a user would want (i.e. security hole)?
exactly, you beaten me on reply-speed ;).
And this patch is needed primarly to get access to hugetlbfs without
IPC_CAP_LOCK as Arjan mentioned.
> I do agree, however, that storing in user struct allows for quota like
> accounting that matches the shm_lock and hugetlb use cases.
Looking forward to see hugetlbfs working with user quota too...
rlimit user-quota is certainly a reasonable approach, though I'm not
sure what happens if root runs chown, that's funny not? Comments?
next prev parent reply other threads:[~2004-07-30 2:09 UTC|newest]
Thread overview: 49+ messages / expand[flat|nested] mbox.gz Atom feed top
2004-07-29 10:03 [patch] mlock-as-nonroot revisted Arjan van de Ven
2004-07-29 21:28 ` Andrew Morton
2004-07-29 21:40 ` Andrea Arcangeli
2004-07-30 0:50 ` Rik van Riel
2004-07-30 2:16 ` Andrea Arcangeli
2004-07-30 0:51 ` Rik van Riel
2004-07-30 2:17 ` Andrea Arcangeli
2004-07-30 1:52 ` Chris Wright
2004-07-30 2:09 ` Andrea Arcangeli [this message]
2004-07-30 2:46 ` Rik van Riel
2004-08-03 20:54 ` Rik van Riel
2004-08-03 21:45 ` Chris Wright
2004-08-03 20:55 ` Rik van Riel
2004-08-03 21:07 ` Andrea Arcangeli
2004-08-03 21:13 ` Arjan van de Ven
2004-08-03 21:36 ` Andrea Arcangeli
2004-08-03 21:38 ` Arjan van de Ven
2004-08-03 21:51 ` Andrea Arcangeli
2004-08-03 22:01 ` Chris Wright
2004-08-03 22:11 ` Andrea Arcangeli
2004-08-03 22:33 ` Chris Wright
2004-08-03 22:42 ` Andrea Arcangeli
2004-08-03 22:52 ` Chris Wright
2004-08-04 1:21 ` Rik van Riel
2004-08-04 1:53 ` Andrea Arcangeli
2004-08-04 2:01 ` Rik van Riel
2004-08-04 2:13 ` Andrea Arcangeli
2004-08-04 2:20 ` William Lee Irwin III
2004-08-04 2:22 ` Rik van Riel
2004-08-04 2:31 ` William Lee Irwin III
2004-08-04 2:56 ` Rik van Riel
2004-08-04 6:06 ` Chris Wright
2004-08-04 13:31 ` Rik van Riel
2004-08-04 13:51 ` Arjan van de Ven
2004-08-04 13:56 ` Rik van Riel
2004-08-04 3:13 ` Andrea Arcangeli
2004-08-04 2:25 ` Chris Wright
2004-08-04 2:07 ` Chris Wright
2004-08-04 2:18 ` Andrea Arcangeli
2004-08-03 21:13 ` Rik van Riel
2004-08-03 21:22 ` Andrea Arcangeli
2004-08-03 21:24 ` Arjan van de Ven
2004-08-03 21:31 ` Rik van Riel
2004-08-03 21:39 ` Andrea Arcangeli
2004-08-04 1:56 ` William Lee Irwin III
2004-08-03 22:18 ` Gerrit Huizenga
2004-08-04 1:22 ` Rik van Riel
2004-08-04 1:37 ` Gerrit Huizenga
2004-08-04 1:55 ` William Lee Irwin III
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