Message-ID: <20150702081934.GA13480@npo.nl>
Date:	Thu, 2 Jul 2015 10:19:34 +0200
From:	Dick Snippe <Dick.Snippe@....nl>
To:	stable@...r.kernel.org
Cc:	linux-kernel@...r.kernel.org
Subject: CVE-2015-1805 and 3.14-longterm?

Hello,

I'm sorry to bother you with this, but lwn.net reported a rather serious
security issue a couple of weeks ago:

http://lwn.net/Articles/646590/
https://bugzilla.redhat.com/show_bug.cgi?id=1202855
CVE-2015-1805
"It was found that the Linux kernel's implementation of vectored pipe
read and write functionality did not take into account the I/O vectors
that were already processed when retrying after a failed atomic access
operation, potentially resulting in memory corruption due to an I/O
vector array overrun. A local, unprivileged user could use this flaw to
crash the system or, potentially, escalate their privileges on the
system."

It appears that these upstream fixes haven't made it to 3.14.4[456]:

http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=f0d1bec9d58d4c038d0ac958c9af82be6eb18045
http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=637b58c2887e5e57850865839cc75f59184b23d1

I'm just a (very happy!) user of the -longterm kernels, so I don't
know how this normally works. But it would appear that this bug still
exists in the -longterm kernels.

-- 
Dick Snippe, internetbeheerder NPO ICT team Media    \ fight war
Postbus 26444, 1202 JJ Hilversum, servicedesk@....nl  \ not wars
+31 35 6773555, Bart de Graaffweg 2, 1217 ZL Hilversum
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