[NETFILTER]: nf_queue: check if rerouter is present before using it
Every rerouter needs to provide a save and a reroute function, we don't need to check for them. But we do need to check if a rerouter is registered at all for the current family, with bridging for example packets of unregistered families can hit nf_queue. Signed-off-by: NPatrick McHardy <kaber@trash.net> Signed-off-by: NDavid S. Miller <davem@davemloft.net>
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