[IPV4]: Fix null dereference in ip_defrag
Been seeing occasional panics in my testing of 2.6.25-rc in ip_defrag. Offending line in ip_defrag is here: net = skb->dev->nd_net where dev is NULL. Bisected the problem down to commit ac18e750 ([NETNS][FRAGS]: Make the inet_frag_queue lookup work in namespaces). Below patch (idea from Patrick McHardy) fixes the problem for me. Signed-off-by: Phil Oester <kernel@linuxace.com> Acked-by: Patrick McHardy <kaber@trash.net> Signed-off-by: David S. Miller <davem@davemloft.net>
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