--- zzzz-none-000/linux-4.9.218/net/sctp/output.c	2020-04-02 15:20:41.000000000 +0000
+++ seale-7590ax-750/linux-4.9.218/net/sctp/output.c	2023-03-29 10:59:08.000000000 +0000
@@ -391,6 +391,10 @@
 	skb->sk = sk;
 	skb->destructor = sctp_packet_release_owner;
 
+#ifdef CONFIG_AVM_SK_TC_INDEX
+	skb->tc_index = sk->sk_tc_index;
+#endif
+
 	/*
 	 * The data chunks have already been accounted for in sctp_sendmsg(),
 	 * therefore only reserve a single byte to keep socket around until