diff --git a/net/sctp/socket.c b/net/sctp/socket.c
index d2665bbd41a2..f52fe90d3e00 100644
--- a/net/sctp/socket.c
+++ b/net/sctp/socket.c
@@ -7033,7 +7033,7 @@ static int sctp_getsockopt_peer_auth_chunks(struct sock *sk, int len,
 
 	/* See if the user provided enough room for all the data */
 	num_chunks = ntohs(ch->param_hdr.length) - sizeof(struct sctp_paramhdr);
-	if (len < num_chunks)
+	if (len < sizeof(struct sctp_authchunks) + num_chunks)
 		return -EINVAL;
 
 	if (copy_to_user(to, ch->chunks, num_chunks))