--- zzzz-none-000/linux-4.9.279/net/sctp/output.c	2021-08-08 06:38:54.000000000 +0000
+++ puma7-atom-6591-750/linux-4.9.279/net/sctp/output.c	2023-02-08 11:43:43.000000000 +0000
@@ -390,6 +390,9 @@
 	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(),