Make sure dst_release() is not called with error pointer. This is
similar to commit b48250764d33b0ba1b062f5ca27260a1c8ac43bf ("ipv4:
Don't ip_rt_put() an error pointer in RAW sockets.").
Signed-off-by: Boris Ostrovsky <boris.ostrovsky@amd.com> Signed-off-by: David S. Miller <davem@davemloft.net>