--- zzzz-none-000/linux-4.4.60/net/sctp/output.c	2017-04-08 07:53:53.000000000 +0000
+++ scorpion-7490-727/linux-4.4.60/net/sctp/output.c	2021-02-04 17:41:59.000000000 +0000
@@ -362,6 +362,9 @@
 	skb_orphan(skb);
 	skb->sk = sk;
 	skb->destructor = sctp_packet_release_owner;
+#ifdef CONFIG_NET_SCHED
+	skb->tc_index = sk->sk_tc_index;
+#endif
 
 	/*
 	 * The data chunks have already been accounted for in sctp_sendmsg(),