1 files changed, 34 insertions, 42 deletions

diff --git a/net/sctp/diag.c b/net/sctp/diag.c
index 1069d7af3672..d9c6d8f30f09 100644
--- a/net/sctp/diag.c
+++ b/net/sctp/diag.c
@@ -61,10 +61,6 @@ static void inet_diag_msg_sctpasoc_fill(struct inet_diag_msg *r,
 		r->idiag_timer = SCTP_EVENT_TIMEOUT_T3_RTX;
 		r->idiag_retrans = asoc->rtx_data_chunks;
 		r->idiag_expires = jiffies_to_msecs(t3_rtx->expires - jiffies);
-	} else {
-		r->idiag_timer = 0;
-		r->idiag_retrans = 0;
-		r->idiag_expires = 0;
 	}
 }
 
@@ -144,13 +140,14 @@ static int inet_sctp_diag_fill(struct sock *sk, struct sctp_association *asoc,
 	r = nlmsg_data(nlh);
 	BUG_ON(!sk_fullsock(sk));
 
+	r->idiag_timer = 0;
+	r->idiag_retrans = 0;
+	r->idiag_expires = 0;
 	if (asoc) {
 		inet_diag_msg_sctpasoc_fill(r, sk, asoc);
 	} else {
 		inet_diag_msg_common_fill(r, sk);
 		r->idiag_state = sk->sk_state;
-		r->idiag_timer = 0;
-		r->idiag_retrans = 0;
 	}
 
 	if (inet_diag_msg_attrs_fill(sk, skb, r, ext, user_ns, net_admin))
@@ -245,56 +242,49 @@ static size_t inet_assoc_attr_size(struct sctp_association *asoc)
 		+ 64;
 }
 
-static int sctp_tsp_dump_one(struct sctp_transport *tsp, void *p)
+static int sctp_sock_dump_one(struct sctp_endpoint *ep, struct sctp_transport *tsp, void *p)
 {
 	struct sctp_association *assoc = tsp->asoc;
-	struct sock *sk = tsp->asoc->base.sk;
 	struct sctp_comm_param *commp = p;
-	struct sk_buff *in_skb = commp->skb;
+	struct sock *sk = ep->base.sk;
 	const struct inet_diag_req_v2 *req = commp->r;
-	const struct nlmsghdr *nlh = commp->nlh;
-	struct net *net = sock_net(in_skb->sk);
+	struct sk_buff *skb = commp->skb;
 	struct sk_buff *rep;
 	int err;
 
 	err = sock_diag_check_cookie(sk, req->id.idiag_cookie);
 	if (err)
-		goto out;
+		return err;
 
-	err = -ENOMEM;
 	rep = nlmsg_new(inet_assoc_attr_size(assoc), GFP_KERNEL);
 	if (!rep)
-		goto out;
+		return -ENOMEM;
 
 	lock_sock(sk);
-	if (sk != assoc->base.sk) {
-		release_sock(sk);
-		sk = assoc->base.sk;
-		lock_sock(sk);
+	if (ep != assoc->ep) {
+		err = -EAGAIN;
+		goto out;
 	}
-	err = inet_sctp_diag_fill(sk, assoc, rep, req,
-				  sk_user_ns(NETLINK_CB(in_skb).sk),
-				  NETLINK_CB(in_skb).portid,
-				  nlh->nlmsg_seq, 0, nlh,
-				  commp->net_admin);
-	release_sock(sk);
+
+	err = inet_sctp_diag_fill(sk, assoc, rep, req, sk_user_ns(NETLINK_CB(skb).sk),
+				  NETLINK_CB(skb).portid, commp->nlh->nlmsg_seq, 0,
+				  commp->nlh, commp->net_admin);
 	if (err < 0) {
 		WARN_ON(err == -EMSGSIZE);
-		kfree_skb(rep);
 		goto out;
 	}
+	release_sock(sk);
+
+	return nlmsg_unicast(sock_net(skb->sk)->diag_nlsk, rep, NETLINK_CB(skb).portid);
 
-	err = netlink_unicast(net->diag_nlsk, rep, NETLINK_CB(in_skb).portid,
-			      MSG_DONTWAIT);
-	if (err > 0)
-		err = 0;
 out:
+	release_sock(sk);
+	kfree_skb(rep);
 	return err;
 }
 
-static int sctp_sock_dump(struct sctp_transport *tsp, void *p)
+static int sctp_sock_dump(struct sctp_endpoint *ep, struct sctp_transport *tsp, void *p)
 {
-	struct sctp_endpoint *ep = tsp->asoc->ep;
 	struct sctp_comm_param *commp = p;
 	struct sock *sk = ep->base.sk;
 	struct sk_buff *skb = commp->skb;
@@ -304,6 +294,8 @@ static int sctp_sock_dump(struct sctp_transport *tsp, void *p)
 	int err = 0;
 
 	lock_sock(sk);
+	if (ep != tsp->asoc->ep)
+		goto release;
 	list_for_each_entry(assoc, &ep->asocs, asocs) {
 		if (cb->args[4] < cb->args[1])
 			goto next;
@@ -346,9 +338,8 @@ release:
 	return err;
 }
 
-static int sctp_sock_filter(struct sctp_transport *tsp, void *p)
+static int sctp_sock_filter(struct sctp_endpoint *ep, struct sctp_transport *tsp, void *p)
 {
-	struct sctp_endpoint *ep = tsp->asoc->ep;
 	struct sctp_comm_param *commp = p;
 	struct sock *sk = ep->base.sk;
 	const struct inet_diag_req_v2 *r = commp->r;
@@ -428,17 +419,18 @@ static void sctp_diag_get_info(struct sock *sk, struct inet_diag_msg *r,
 		sctp_get_sctp_info(sk, infox->asoc, infox->sctpinfo);
 }
 
-static int sctp_diag_dump_one(struct sk_buff *in_skb,
-			      const struct nlmsghdr *nlh,
+static int sctp_diag_dump_one(struct netlink_callback *cb,
 			      const struct inet_diag_req_v2 *req)
 {
-	struct net *net = sock_net(in_skb->sk);
+	struct sk_buff *skb = cb->skb;
+	struct net *net = sock_net(skb->sk);
+	const struct nlmsghdr *nlh = cb->nlh;
 	union sctp_addr laddr, paddr;
 	struct sctp_comm_param commp = {
-		.skb = in_skb,
+		.skb = skb,
 		.r = req,
 		.nlh = nlh,
-		.net_admin = netlink_net_capable(in_skb, CAP_NET_ADMIN),
+		.net_admin = netlink_net_capable(skb, CAP_NET_ADMIN),
 	};
 
 	if (req->sdiag_family == AF_INET) {
@@ -461,12 +453,12 @@ static int sctp_diag_dump_one(struct sk_buff *in_skb,
 		paddr.v6.sin6_family = AF_INET6;
 	}
 
-	return sctp_transport_lookup_process(sctp_tsp_dump_one,
+	return sctp_transport_lookup_process(sctp_sock_dump_one,
 					     net, &laddr, &paddr, &commp);
 }
 
 static void sctp_diag_dump(struct sk_buff *skb, struct netlink_callback *cb,
-			   const struct inet_diag_req_v2 *r, struct nlattr *bc)
+			   const struct inet_diag_req_v2 *r)
 {
 	u32 idiag_states = r->idiag_states;
 	struct net *net = sock_net(skb->sk);
@@ -506,8 +498,8 @@ skip:
 	if (!(idiag_states & ~(TCPF_LISTEN | TCPF_CLOSE)))
 		goto done;
 
-	sctp_for_each_transport(sctp_sock_filter, sctp_sock_dump,
-				net, &pos, &commp);
+	sctp_transport_traverse_process(sctp_sock_filter, sctp_sock_dump,
+					net, &pos, &commp);
 	cb->args[2] = pos;
 
 done: