Commit bf6f95ae authored by Xin Long's avatar Xin Long Committed by Jakub Kicinski
Browse files

sctp: fix missing encap_port propagation for GSO fragments 



encap_port in SCTP_INPUT_CB(skb) is used by sctp_vtag_verify() for
SCTP-over-UDP processing. In the GSO case, it is only set on the head
skb, while fragment skbs leave it 0.

This results in fragment skbs seeing encap_port == 0, breaking
SCTP-over-UDP connections.

Fix it by propagating encap_port from the head skb cb when initializing
fragment skbs in sctp_inq_pop().

Fixes: 046c052b ("sctp: enable udp tunneling socks")
Signed-off-by: default avatarXin Long <lucien.xin@gmail.com>
Acked-by: default avatarMarcelo Ricardo Leitner <marcelo.leitner@gmail.com>
Link: https://patch.msgid.link/ea65ed61b3598d8b4940f0170b9aa1762307e6c3.1776017631.git.lucien.xin@gmail.com


Signed-off-by: default avatarJakub Kicinski <kuba@kernel.org>
parent 8b0c2552

net/sctp/inqueue.c

+1 −0
Original line number Diff line number Diff line
@@ -201,6 +201,7 @@ struct sctp_chunk *sctp_inq_pop(struct sctp_inq *queue) 


			cb->chunk = head_cb->chunk;

			cb->af = head_cb->af;

			cb->encap_port = head_cb->encap_port;

		}

	}