On Thu, Jan 23, 2020 at 12:33:28PM -0800, Praveen Chaudhary wrote: > skb->csum is updated incorrectly, when manipulation for NF_NAT_MANIP_SRC\DST > is done on IPV6 packet. > > Fix: > There is no need to update skb->csum in inet_proto_csum_replace16(), because > update in two fields a.) IPv6 src/dst address and b.) L4 header checksum > cancels each other for skb->csum calculation. > Whereas inet_proto_csum_replace4 function needs to update skb->csum, > because update in 3 fields a.) IPv4 src/dst address, b.) IPv4 Header checksum > and c.) L4 header checksum results in same diff as L4 Header checksum for > skb->csum calculation. Applied, thanks.
