From: Arnd Bergmann <arnd@arndb.de>
To: James Bottomley <James.Bottomley@hansenpartnership.com>
Cc: Marek Szyprowski <m.szyprowski@samsung.com>,
Bjorn Helgaas <bhelgaas@google.com>,
Michal Simek <michal.simek@xilinx.com>,
"linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>,
Michal Simek <monstr@monstr.eu>,
"Linux-Arch" <linux-arch@vger.kernel.org>
Subject: Re: [PATCH] dma-mapping: Add BUG_ON for uninitialized dma_ops
Date: Wed, 19 Jun 2013 17:20:46 +0200 [thread overview]
Message-ID: <201306191720.47185.arnd@arndb.de> (raw)
In-Reply-To: <1371226483.2726.19.camel@dabdike>
On Friday 14 June 2013, James Bottomley wrote:
> This is the MMAP_PAGE_ZERO exploit. The original exploit relied on a
> leaky personality capability clearing mask and was fixed in 2.6.31 by
>
> commit f9fabcb58a6d26d6efde842d1703ac7cfa9427b6
> Author: Julien Tinnes <jt@cr0.org>
> Date: Fri Jun 26 20:27:40 2009 +0200
>
> personality: fix PER_CLEAR_ON_SETID
>
> So it's not really relevant to 3.x kernels, is it?
Probably not. There is always a risk that something like this
can turn into an exploit, but it needs a combination with a couple
of other bugs.
Arnd
next prev parent reply other threads:[~2013-06-19 15:20 UTC|newest]
Thread overview: 12+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-06-03 12:44 Michal Simek
2013-06-10 9:00 ` Michal Simek
2013-06-11 2:34 ` Bjorn Helgaas
2013-06-11 11:02 ` Marek Szyprowski
2013-06-11 13:54 ` James Bottomley
2013-06-12 15:06 ` Arnd Bergmann
2013-06-13 8:51 ` Marek Szyprowski
2013-06-13 20:59 ` James Bottomley
2013-06-14 14:36 ` Arnd Bergmann
2013-06-14 16:14 ` James Bottomley
2013-06-19 15:20 ` Arnd Bergmann [this message]
2013-06-26 12:58 ` Michal Simek
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