From 5b5a60da281c767196427ce8144deae6ec46b389 Mon Sep 17 00:00:00 2001
From: Olaf Kirch <olaf.kirch@oracle.com>
Date: Sat, 23 Jun 2007 23:11:52 -0700
Subject: [PATCH] [NET]: Make skb_seq_read unmap the last fragment

Having walked through the entire skbuff, skb_seq_read would leave the
last fragment mapped.  As a consequence, the unwary caller would leak
kmaps, and proceed with preempt_count off by one. The only (kind of
non-intuitive) workaround is to use skb_seq_read_abort.

This patch makes sure skb_seq_read always unmaps frag_data after
having cycled through the skb's paged part.

Signed-off-by: Olaf Kirch <olaf.kirch@oracle.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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