]> git.proxmox.com Git - mirror_ubuntu-kernels.git/commit
tcp: gso: really support BIG TCP
authorEric Dumazet <edumazet@google.com>
Mon, 5 Jun 2023 16:16:47 +0000 (16:16 +0000)
committerJakub Kicinski <kuba@kernel.org>
Wed, 7 Jun 2023 04:07:43 +0000 (21:07 -0700)
commit82a01ab35bd02ba4b0b4e12bc95c5b69240eb7b0
tree0f74163fbde30e7dfadc49188c999adc1960e243
parenta2f4c143d76b1a47c91ef9bc46907116b111da0b
tcp: gso: really support BIG TCP

We missed that tcp_gso_segment() was assuming skb->len was smaller than 65535 :

oldlen = (u16)~skb->len;

This part came with commit 0718bcc09b35 ("[NET]: Fix CHECKSUM_HW GSO problems.")

This leads to wrong TCP checksum.

Adapt the code to accept arbitrary packet length.

v2:
  - use two csum_add() instead of csum_fold() (Alexander Duyck)
  - Change delta type to __wsum to reduce casts (Alexander Duyck)

Fixes: 09f3d1a3a52c ("ipv6/gso: remove temporary HBH/jumbo header")
Signed-off-by: Eric Dumazet <edumazet@google.com>
Reviewed-by: Alexander Duyck <alexanderduyck@fb.com>
Reviewed-by: Simon Horman <simon.horman@corigine.com>
Link: https://lore.kernel.org/r/20230605161647.3624428-1-edumazet@google.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
net/ipv4/tcp_offload.c