From: Eric Dumazet <edumazet@google.com>
Date: Thu, 3 Jan 2013 22:18:39 +0000 (+0000)
Subject: netfilter: xt_recent: avoid high order page allocations
X-Git-Tag: v3.8-rc3~8^2~1^2
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=2727de76041b2064c0b74f00a2a89678fb3efafc;p=pandora-kernel.git

netfilter: xt_recent: avoid high order page allocations

xt_recent can try high order page allocations and this can fail.

iptables: page allocation failure: order:9, mode:0xc0d0

It also wastes about half the allocated space because of kmalloc()
power-of-two roundups and struct recent_table layout.

Use vmalloc() instead to save space and be less prone to allocation
errors when memory is fragmented.

Reported-by: Miroslav Kratochvil <exa.exa@gmail.com>
Reported-by: Dave Jones <davej@redhat.com>
Reported-by: Harald Reindl <h.reindl@thelounge.net>
Signed-off-by: Eric Dumazet <edumazet@google.com>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
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