Re: [PATCH net V2] net: ipv6: Validate GSO SKB before finish IPv6 processing

2021-01-06 Thread Jakub Kicinski
On Tue, 5 Jan 2021 15:43:21 +0200 Aya Levin wrote: > There are cases where GSO segment's length exceeds the egress MTU. Please name same for posterity. Please widen the CC list. > If so: > - Consume the SKB and its segments. > - Issue an ICMP packet with 'Packet Too Big' message containing th

[PATCH net V2] net: ipv6: Validate GSO SKB before finish IPv6 processing

2021-01-05 Thread Aya Levin
There are cases where GSO segment's length exceeds the egress MTU. If so: - Consume the SKB and its segments. - Issue an ICMP packet with 'Packet Too Big' message containing the MTU, allowing the source host to reduce its Path MTU appropriately. Note: These cases are handled in the same manne