udp: ipv4: manipulate network header of NATed UDP GRO fraglist
UDP/IP header of UDP GROed frag_skbs are not updated even after NAT forwarding. Only the header of head_skb from ip_finish_output_gso -> skb_gso_segment is updated but following frag_skbs are not updated. A call path skb_mac_gso_segment -> inet_gso_segment -> udp4_ufo_fragment -> __udp_gso_segment -> __udp_gso_segment_list does not try to update UDP/IP header of the segment list but copy only the MAC header. Update port, addr and check of each skb of the segment list in __udp_gso_segment_list. It covers both SNAT and DNAT. Fixes: 9fd1ff5d (udp: Support UDP fraglist GRO/GSO.) Signed-off-by: Dongseok Yi <dseok.yi@samsung.com> Acked-by: Steffen Klassert <steffen.klassert@secunet.com> Link: https://lore.kernel.org/r/1611962007-80092-1-git-send-email-dseok.yi@samsung.comSigned-off-by: Jakub Kicinski <kuba@kernel.org>
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