From: Vitaliy Gusev <vgusev@openvz.org>
Date: Tue, 15 Apr 2008 07:33:38 +0000 (-0700)
Subject: [TCP]: Fix never pruned tcp out-of-order queue.
X-Git-Tag: v2.6.25~4^2~5
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=b000cd3707e7b25d76745f9c0e261c23d21fa578;p=pandora-kernel.git

[TCP]: Fix never pruned tcp out-of-order queue.

tcp_prune_queue() doesn't prune an out-of-order queue at all.
Therefore sk_rmem_schedule() can fail but the out-of-order queue isn't
pruned . This can lead to tcp deadlock state if the next two
conditions are held:

1. There are a sequence hole between last received in
   order segment and segments enqueued to the out-of-order queue.

2. Size of all segments in the out-of-order queue is more than tcp_mem[2].

Signed-off-by: Vitaliy Gusev <vgusev@openvz.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
---

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