---

yaml
---
r: 27589
b: refs/heads/master
c: 402d68c
h: refs/heads/master
i:
  27587: 3557321
v: v3

[refs]

@@ -1,2 +1,2 @@
 ---
-refs/heads/master: c7ce1ae21223fe1f905feba272bc14b87994a57d
+refs/heads/master: 402d68c43326d2f0e7e2e9a9013cd4c098d9b87c

trunk/net/sctp/socket.c

@@ -2530,8 +2530,32 @@ static int sctp_setsockopt_associnfo(struct sock *sk, char __user *optval, int o
 
 	/* Set the values to the specific association */
 	if (asoc) {
-		if (assocparams.sasoc_asocmaxrxt != 0)
+		if (assocparams.sasoc_asocmaxrxt != 0) {
+			__u32 path_sum = 0;
+			int   paths = 0;
+			struct list_head *pos;
+			struct sctp_transport *peer_addr;
+
+			list_for_each(pos, &asoc->peer.transport_addr_list) {
+				peer_addr = list_entry(pos,
+						struct sctp_transport,
+						transports);
+				path_sum += peer_addr->pathmaxrxt;
+				paths++;
+			}
+
+			/* Only validate asocmaxrxt if we have more then
+			 * one path/transport.  We do this because path
+			 * retransmissions are only counted when we have more
+			 * then one path.
+			 */
+			if (paths > 1 &&
+			    assocparams.sasoc_asocmaxrxt > path_sum)
+				return -EINVAL;
+
 			asoc->max_retrans = assocparams.sasoc_asocmaxrxt;
+		}
+
 		if (assocparams.sasoc_cookie_life != 0) {
 			asoc->cookie_life.tv_sec =
 					assocparams.sasoc_cookie_life / 1000;