Hi Sven, On Tue, Feb 02, 2021 at 06:01:16PM +0100, sven.auhagen@xxxxxxxxxxxx wrote: > From: Sven Auhagen <sven.auhagen@xxxxxxxxxxxx> > > When updating the tcp or udp header checksum on port nat > the function inet_proto_csum_replace2 with the last parameter > pseudohdr as true. > This leads to an error in the case that GRO is used and packets > are split up in GSO. > The tcp or udp checksum of all packets is incorrect. > > The error is probably masked due to the fact the most network driver > implement tcp/udp checksum offloading. > It also only happens when GRO is applied and not on single packets. > > The error is most visible when using a pppoe connection which is not > triggering the tcp/udp checksum offload. Good catch. I'll apply this patch to nf.git.
