tree 536ca01291bd131be75fed6742557d1885774622
parent a69518cf0b4cbf02c6bc1239cdeb8750a9eb8077
author Alexey Kodanev <alexey.kodanev@oracle.com> 1507305755 +0300
committer David S. Miller <davem@davemloft.net> 1507482735 -0700

gso: fix payload length when gso_size is zero

When gso_size reset to zero for the tail segment in skb_segment(), later
in ipv6_gso_segment(), __skb_udp_tunnel_segment() and gre_gso_segment()
we will get incorrect results (payload length, pcsum) for that segment.
inet_gso_segment() already has a check for gso_size before calculating
payload.

The issue was found with LTP vxlan & gre tests over ixgbe NIC.

Fixes: 07b26c9454a2 ("gso: Support partial splitting at the frag_list pointer")
Signed-off-by: Alexey Kodanev <alexey.kodanev@oracle.com>
Acked-by: Alexander Duyck <alexander.h.duyck@intel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>