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Date: Wed, 24 Jul 2013 01:45:26 +0530 (IST)
From: P J P <ppandit@...hat.com>
To: oss security list <oss-security@...ts.openwall.com>
Subject: Re: CVE request: Linux kernel: panic while appending
data to a corked IPv6 socket in ip6_append_data_mtu
+-- On Tue, 23 Jul 2013, Seth Arnold wrote --+
| UDP_CORKED? I don't see this string in my /usr/include/ or recent Linux git
| tree.
| Am I missing something?
It's one of those non-portable Linux socket options.
===
$ man 7 udp
...
UDP_CORK (since Linux 2.5.44)
If this option is enabled, then all data output on this socket
is accumulated into a single datagram that is transmitted when
the option is disabled. This option should not be used in code
intended to be portable.
===
Though the crash is more of due to IPV6_MTU value set. (from commit log)
--
Prasad J Pandit / Red Hat Security Response Team
DB7A 84C5 D3F9 7CD1 B5EB C939 D048 7860 3655 602B
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