diff --git a/net/sctp/stream_interleave.c b/net/sctp/stream_interleave.c
index 40c40be23fcb..c982f99099de 100644
--- a/net/sctp/stream_interleave.c
+++ b/net/sctp/stream_interleave.c
@@ -1165,7 +1165,8 @@ static void sctp_generate_iftsn(struct sctp_outq *q, __u32 ctsn)
 
 #define _sctp_walk_ifwdtsn(pos, chunk, end) \
 	for (pos = chunk->subh.ifwdtsn_hdr->skip; \
-	     (void *)pos < (void *)chunk->subh.ifwdtsn_hdr->skip + (end); pos++)
+	     (void *)pos <= (void *)chunk->subh.ifwdtsn_hdr->skip + (end) - \
+			    sizeof(struct sctp_ifwdtsn_skip); pos++)
 
 #define sctp_walk_ifwdtsn(pos, ch) \
 	_sctp_walk_ifwdtsn((pos), (ch), ntohs((ch)->chunk_hdr->length) - \