From: Patrick McHardy <kaber@trash.net>
Date: Tue, 5 Dec 2006 21:46:13 +0000 (-0800)
Subject: [NET_SCHED]: cls_fw: fix NULL pointer dereference
X-Git-Tag: v2.6.20-rc1~145^2^2~7^2~21
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=5c804bfdcca2593422dd6edc2d7db4dba645543c;p=pandora-kernel.git

[NET_SCHED]: cls_fw: fix NULL pointer dereference

When the first fw classifier is initialized, there is a small window
between the ->init() and ->change() calls, during which the classifier
is active but not entirely set up and tp->root is still NULL (->init()
does nothing).

When a packet is queued during this window a NULL pointer dereference
occurs in fw_classify() when trying to dereference head->mask;

Signed-off-by: Patrick McHardy <kaber@trash.net>
Signed-off-by: David S. Miller <davem@davemloft.net>
---

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