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From: Andrew Morton <akpm@osdl.org>
To: Hugh Dickins <hugh@veritas.com>
Cc: andrea@suse.de, nickpiggin@yahoo.com.au, linux-kernel@vger.kernel.org
Subject: Re: smp race fix between invalidate_inode_pages* and do_no_page
Date: Wed, 11 Jan 2006 13:05:33 -0800	[thread overview]
Message-ID: <20060111130533.6f23685b.akpm@osdl.org> (raw)
In-Reply-To: <Pine.LNX.4.61.0601111949070.6448@goblin.wat.veritas.com>

Hugh Dickins <hugh@veritas.com> wrote:
>
>  But I do not know what guarantees invalidate_inode_pages2 is supposed
>  to give.  As soon as you emerge from iipages2, its work could be undone:

yup.  It cannot become a hard guarantee unless we add some new really big
locks.

So it can be fooled by silly or poorly-designed apps.  What we're aiming
for here is predictable behaviour for sanely-implemented applications and
refusal to oops or to expose insecure data for poorly-designed ones or
exploits.

  reply	other threads:[~2006-01-11 21:05 UTC|newest]

Thread overview: 23+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2005-12-13 19:37 smp race fix between invalidate_inode_pages* and do_no_page Andrea Arcangeli
2005-12-13 21:02 ` Andrew Morton
2005-12-13 21:14   ` Andrea Arcangeli
2005-12-16 13:51     ` Andrea Arcangeli
2006-01-10  6:24       ` Andrea Arcangeli
2006-01-10  6:48         ` Andrea Arcangeli
2006-01-11  4:08         ` Nick Piggin
2006-01-11  8:23           ` Andrea Arcangeli
2006-01-11  8:51             ` Andrew Morton
2006-01-11  9:02               ` Andrea Arcangeli
2006-01-11  9:06                 ` Andrew Morton
2006-01-11  9:13                   ` Andrea Arcangeli
2006-01-11 20:49                     ` Hugh Dickins
2006-01-11 21:05                       ` Andrew Morton [this message]
2006-01-13  7:35                       ` Nick Piggin
2006-01-13  7:47                         ` Andrew Morton
2006-01-13 10:37                           ` Nick Piggin
2006-03-31 12:36                             ` Andrea Arcangeli
2006-04-02  5:17                               ` Nick Piggin
2006-04-02  5:21                               ` Andrew Morton
2006-04-07 19:18                                 ` Hugh Dickins
2006-01-11  9:39                 ` Nick Piggin
2006-01-11  9:34             ` Nick Piggin

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