3 files changed, 44 insertions, 42 deletions

diff --git a/net/sctp/protocol.c b/net/sctp/protocol.c
index b78e3be6901..c4986d0f741 100644
--- a/net/sctp/protocol.c
+++ b/net/sctp/protocol.c
@@ -717,15 +717,20 @@ static int sctp_inetaddr_event(struct notifier_block *this, unsigned long ev,
 static int sctp_ctl_sock_init(void)
 {
 	int err;
-	sa_family_t family;
+	sa_family_t family = PF_INET;
 
 	if (sctp_get_pf_specific(PF_INET6))
 		family = PF_INET6;
-	else
-		family = PF_INET;
 
 	err = inet_ctl_sock_create(&sctp_ctl_sock, family,
 				   SOCK_SEQPACKET, IPPROTO_SCTP, &init_net);
+
+	/* If IPv6 socket could not be created, try the IPv4 socket */
+	if (err < 0 && family == PF_INET6)
+		err = inet_ctl_sock_create(&sctp_ctl_sock, AF_INET,
+					   SOCK_SEQPACKET, IPPROTO_SCTP,
+					   &init_net);
+
 	if (err < 0) {
 		printk(KERN_ERR
 		       "SCTP: Failed to create the SCTP control socket.\n");
@@ -1322,9 +1327,8 @@ SCTP_STATIC __init int sctp_init(void)
 out:
 	return status;
 err_v6_add_protocol:
-	sctp_v6_del_protocol();
-err_add_protocol:
 	sctp_v4_del_protocol();
+err_add_protocol:
 	inet_ctl_sock_destroy(sctp_ctl_sock);
 err_ctl_sock_init:
 	sctp_v6_protosw_exit();
@@ -1335,7 +1339,6 @@ err_protosw_init:
 	sctp_v4_pf_exit();
 	sctp_v6_pf_exit();
 	sctp_sysctl_unregister();
-	list_del(&sctp_af_inet.list);
 	free_pages((unsigned long)sctp_port_hashtable,
 		   get_order(sctp_port_hashsize *
 			     sizeof(struct sctp_bind_hashbucket)));
@@ -1383,7 +1386,6 @@ SCTP_STATIC __exit void sctp_exit(void)
 	sctp_v4_pf_exit();
 
 	sctp_sysctl_unregister();
-	list_del(&sctp_af_inet.list);
 
 	free_pages((unsigned long)sctp_assoc_hashtable,
 		   get_order(sctp_assoc_hashsize *
diff --git a/net/sctp/sm_sideeffect.c b/net/sctp/sm_sideeffect.c
index e1d6076b4f5..b5495aecab6 100644
--- a/net/sctp/sm_sideeffect.c
+++ b/net/sctp/sm_sideeffect.c
@@ -787,36 +787,48 @@ static void sctp_cmd_process_operr(sctp_cmd_seq_t *cmds,
 				   struct sctp_association *asoc,
 				   struct sctp_chunk *chunk)
 {
-	struct sctp_operr_chunk *operr_chunk;
 	struct sctp_errhdr *err_hdr;
+	struct sctp_ulpevent *ev;
 
-	operr_chunk = (struct sctp_operr_chunk *)chunk->chunk_hdr;
-	err_hdr = &operr_chunk->err_hdr;
+	while (chunk->chunk_end > chunk->skb->data) {
+		err_hdr = (struct sctp_errhdr *)(chunk->skb->data);
 
-	switch (err_hdr->cause) {
-	case SCTP_ERROR_UNKNOWN_CHUNK:
-	{
-		struct sctp_chunkhdr *unk_chunk_hdr;
+		ev = sctp_ulpevent_make_remote_error(asoc, chunk, 0,
+						     GFP_ATOMIC);
+		if (!ev)
+			return;
 
-		unk_chunk_hdr = (struct sctp_chunkhdr *)err_hdr->variable;
-		switch (unk_chunk_hdr->type) {
-		/* ADDIP 4.1 A9) If the peer responds to an ASCONF with an
-		 * ERROR chunk reporting that it did not recognized the ASCONF
-		 * chunk type, the sender of the ASCONF MUST NOT send any
-		 * further ASCONF chunks and MUST stop its T-4 timer.
-		 */
-		case SCTP_CID_ASCONF:
-			asoc->peer.asconf_capable = 0;
-			sctp_add_cmd_sf(cmds, SCTP_CMD_TIMER_STOP,
+		sctp_ulpq_tail_event(&asoc->ulpq, ev);
+
+		switch (err_hdr->cause) {
+		case SCTP_ERROR_UNKNOWN_CHUNK:
+		{
+			sctp_chunkhdr_t *unk_chunk_hdr;
+
+			unk_chunk_hdr = (sctp_chunkhdr_t *)err_hdr->variable;
+			switch (unk_chunk_hdr->type) {
+			/* ADDIP 4.1 A9) If the peer responds to an ASCONF with
+			 * an ERROR chunk reporting that it did not recognized
+			 * the ASCONF chunk type, the sender of the ASCONF MUST
+			 * NOT send any further ASCONF chunks and MUST stop its
+			 * T-4 timer.
+			 */
+			case SCTP_CID_ASCONF:
+				if (asoc->peer.asconf_capable == 0)
+					break;
+
+				asoc->peer.asconf_capable = 0;
+				sctp_add_cmd_sf(cmds, SCTP_CMD_TIMER_STOP,
 					SCTP_TO(SCTP_EVENT_TIMEOUT_T4_RTO));
+				break;
+			default:
+				break;
+			}
 			break;
+		}
 		default:
 			break;
 		}
-		break;
-	}
-	default:
-		break;
 	}
 }
 
diff --git a/net/sctp/sm_statefuns.c b/net/sctp/sm_statefuns.c
index 3a0cd075914..f88dfded0e3 100644
--- a/net/sctp/sm_statefuns.c
+++ b/net/sctp/sm_statefuns.c
@@ -3163,7 +3163,6 @@ sctp_disposition_t sctp_sf_operr_notify(const struct sctp_endpoint *ep,
 					sctp_cmd_seq_t *commands)
 {
 	struct sctp_chunk *chunk = arg;
-	struct sctp_ulpevent *ev;
 
 	if (!sctp_vtag_verify(chunk, asoc))
 		return sctp_sf_pdiscard(ep, asoc, type, arg, commands);
@@ -3173,21 +3172,10 @@ sctp_disposition_t sctp_sf_operr_notify(const struct sctp_endpoint *ep,
 		return sctp_sf_violation_chunklen(ep, asoc, type, arg,
 						  commands);
 
-	while (chunk->chunk_end > chunk->skb->data) {
-		ev = sctp_ulpevent_make_remote_error(asoc, chunk, 0,
-						     GFP_ATOMIC);
-		if (!ev)
-			goto nomem;
+	sctp_add_cmd_sf(commands, SCTP_CMD_PROCESS_OPERR,
+			SCTP_CHUNK(chunk));
 
-		sctp_add_cmd_sf(commands, SCTP_CMD_EVENT_ULP,
-				SCTP_ULPEVENT(ev));
-		sctp_add_cmd_sf(commands, SCTP_CMD_PROCESS_OPERR,
-				SCTP_CHUNK(chunk));
-	}
 	return SCTP_DISPOSITION_CONSUME;
-
-nomem:
-	return SCTP_DISPOSITION_NOMEM;
 }
 
 /*