From: Steven J. Magnani <steve@digidescorp.com>
Date: Tue, 30 Mar 2010 20:56:01 +0000 (-0700)
Subject: net: Fix oops from tcp_collapse() when using splice()
X-Git-Tag: v2.6.34-rc4~64^2~22
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=baff42ab1494528907bf4d5870359e31711746ae;p=pandora-kernel.git

net: Fix oops from tcp_collapse() when using splice()

tcp_read_sock() can have a eat skbs without immediately advancing copied_seq.
This can cause a panic in tcp_collapse() if it is called as a result
of the recv_actor dropping the socket lock.

A userspace program that splices data from a socket to either another
socket or to a file can trigger this bug.

Signed-off-by: Steven J. Magnani <steve@digidescorp.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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