diff --git a/net/sctp/sm_statefuns.c b/net/sctp/sm_statefuns.c
index 9f2a3eb..1c4e5d6 100644
--- a/net/sctp/sm_statefuns.c
+++ b/net/sctp/sm_statefuns.c
@@ -3689,6 +3689,7 @@
 {
 	struct sctp_chunk *chunk = arg;
 	struct sctp_fwdtsn_hdr *fwdtsn_hdr;
+	struct sctp_fwdtsn_skip *skip;
 	__u16 len;
 	__u32 tsn;
 
@@ -3718,6 +3719,12 @@
 	if (sctp_tsnmap_check(&asoc->peer.tsn_map, tsn) < 0)
 		goto discard_noforce;
 
+	/* Silently discard the chunk if stream-id is not valid */
+	sctp_walk_fwdtsn(skip, chunk) {
+		if (ntohs(skip->stream) >= asoc->c.sinit_max_instreams)
+			goto discard_noforce;
+	}
+
 	sctp_add_cmd_sf(commands, SCTP_CMD_REPORT_FWDTSN, SCTP_U32(tsn));
 	if (len > sizeof(struct sctp_fwdtsn_hdr))
 		sctp_add_cmd_sf(commands, SCTP_CMD_PROCESS_FWDTSN,
@@ -3749,6 +3756,7 @@
 {
 	struct sctp_chunk *chunk = arg;
 	struct sctp_fwdtsn_hdr *fwdtsn_hdr;
+	struct sctp_fwdtsn_skip *skip;
 	__u16 len;
 	__u32 tsn;
 
@@ -3778,6 +3786,12 @@
 	if (sctp_tsnmap_check(&asoc->peer.tsn_map, tsn) < 0)
 		goto gen_shutdown;
 
+	/* Silently discard the chunk if stream-id is not valid */
+	sctp_walk_fwdtsn(skip, chunk) {
+		if (ntohs(skip->stream) >= asoc->c.sinit_max_instreams)
+			goto gen_shutdown;
+	}
+
 	sctp_add_cmd_sf(commands, SCTP_CMD_REPORT_FWDTSN, SCTP_U32(tsn));
 	if (len > sizeof(struct sctp_fwdtsn_hdr))
 		sctp_add_cmd_sf(commands, SCTP_CMD_PROCESS_FWDTSN,