netns: Add network namespace argument to rt6_fill_node() and ipv6_dev_get_saddr()
ipv6_dev_get_saddr() blindly de-references dst_dev to get the network namespace, but some callers might pass NULL. Change callers to pass a namespace pointer instead. Signed-off-by: Brian Haley <brian.haley@hp.com> Signed-off-by: David S. Miller <davem@davemloft.net>
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