Merge branch 'linus' into objtool/core, to pick up Xen dependencies

Pick up dependencies - freshly merged upstream via xen-next - before applying
dependent objtool changes.

Signed-off-by: Ingo Molnar <mingo@kernel.org>

6 files changed, 56 insertions, 36 deletions

diff --git a/net/ipv6/addrconf.c b/net/ipv6/addrconf.c
index f7a84a4acffc..faa47f9ea73a 100644
--- a/net/ipv6/addrconf.c
+++ b/net/ipv6/addrconf.c
@@ -3127,17 +3127,17 @@ static void add_v4_addrs(struct inet6_dev *idev)
 		offset = sizeof(struct in6_addr) - 4;
 	memcpy(&addr.s6_addr32[3], idev->dev->dev_addr + offset, 4);
 
-	if (idev->dev->flags&IFF_POINTOPOINT) {
+	if (!(idev->dev->flags & IFF_POINTOPOINT) && idev->dev->type == ARPHRD_SIT) {
+		scope = IPV6_ADDR_COMPATv4;
+		plen = 96;
+		pflags |= RTF_NONEXTHOP;
+	} else {
 		if (idev->cnf.addr_gen_mode == IN6_ADDR_GEN_MODE_NONE)
 			return;
 
 		addr.s6_addr32[0] = htonl(0xfe800000);
 		scope = IFA_LINK;
 		plen = 64;
-	} else {
-		scope = IPV6_ADDR_COMPATv4;
-		plen = 96;
-		pflags |= RTF_NONEXTHOP;
 	}
 
 	if (addr.s6_addr32[3]) {
@@ -3447,6 +3447,30 @@ static void addrconf_gre_config(struct net_device *dev)
 }
 #endif
 
+static void addrconf_init_auto_addrs(struct net_device *dev)
+{
+	switch (dev->type) {
+#if IS_ENABLED(CONFIG_IPV6_SIT)
+	case ARPHRD_SIT:
+		addrconf_sit_config(dev);
+		break;
+#endif
+#if IS_ENABLED(CONFIG_NET_IPGRE) || IS_ENABLED(CONFIG_IPV6_GRE)
+	case ARPHRD_IP6GRE:
+	case ARPHRD_IPGRE:
+		addrconf_gre_config(dev);
+		break;
+#endif
+	case ARPHRD_LOOPBACK:
+		init_loopback(dev);
+		break;
+
+	default:
+		addrconf_dev_config(dev);
+		break;
+	}
+}
+
 static int fixup_permanent_addr(struct net *net,
 				struct inet6_dev *idev,
 				struct inet6_ifaddr *ifp)
@@ -3615,26 +3639,7 @@ static int addrconf_notify(struct notifier_block *this, unsigned long event,
 			run_pending = 1;
 		}
 
-		switch (dev->type) {
-#if IS_ENABLED(CONFIG_IPV6_SIT)
-		case ARPHRD_SIT:
-			addrconf_sit_config(dev);
-			break;
-#endif
-#if IS_ENABLED(CONFIG_NET_IPGRE) || IS_ENABLED(CONFIG_IPV6_GRE)
-		case ARPHRD_IP6GRE:
-		case ARPHRD_IPGRE:
-			addrconf_gre_config(dev);
-			break;
-#endif
-		case ARPHRD_LOOPBACK:
-			init_loopback(dev);
-			break;
-
-		default:
-			addrconf_dev_config(dev);
-			break;
-		}
+		addrconf_init_auto_addrs(dev);
 
 		if (!IS_ERR_OR_NULL(idev)) {
 			if (run_pending)
@@ -6397,7 +6402,7 @@ static int addrconf_sysctl_addr_gen_mode(struct ctl_table *ctl, int write,
 
 			if (idev->cnf.addr_gen_mode != new_val) {
 				idev->cnf.addr_gen_mode = new_val;
-				addrconf_dev_config(idev->dev);
+				addrconf_init_auto_addrs(idev->dev);
 			}
 		} else if (&net->ipv6.devconf_all->addr_gen_mode == ctl->data) {
 			struct net_device *dev;
@@ -6408,7 +6413,7 @@ static int addrconf_sysctl_addr_gen_mode(struct ctl_table *ctl, int write,
 				if (idev &&
 				    idev->cnf.addr_gen_mode != new_val) {
 					idev->cnf.addr_gen_mode = new_val;
-					addrconf_dev_config(idev->dev);
+					addrconf_init_auto_addrs(idev->dev);
 				}
 			}
 		}
diff --git a/net/ipv6/af_inet6.c b/net/ipv6/af_inet6.c
index fee9163382c2..847934763868 100644
--- a/net/ipv6/af_inet6.c
+++ b/net/ipv6/af_inet6.c
@@ -222,6 +222,7 @@ lookup_protocol:
 	np->pmtudisc	= IPV6_PMTUDISC_WANT;
 	np->repflow	= net->ipv6.sysctl.flowlabel_reflect & FLOWLABEL_REFLECT_ESTABLISHED;
 	sk->sk_ipv6only	= net->ipv6.sysctl.bindv6only;
+	sk->sk_txrehash = READ_ONCE(net->core.sysctl_txrehash);
 
 	/* Init the ipv4 part of the socket since we can have sockets
 	 * using v6 API for ipv4.
diff --git a/net/ipv6/datagram.c b/net/ipv6/datagram.c
index e624497fa992..9b6818453afe 100644
--- a/net/ipv6/datagram.c
+++ b/net/ipv6/datagram.c
@@ -51,7 +51,7 @@ static void ip6_datagram_flow_key_init(struct flowi6 *fl6, struct sock *sk)
 	fl6->flowi6_mark = sk->sk_mark;
 	fl6->fl6_dport = inet->inet_dport;
 	fl6->fl6_sport = inet->inet_sport;
-	fl6->flowlabel = np->flow_label;
+	fl6->flowlabel = ip6_make_flowinfo(np->tclass, np->flow_label);
 	fl6->flowi6_uid = sk->sk_uid;
 
 	if (!oif)
diff --git a/net/ipv6/ip6_output.c b/net/ipv6/ip6_output.c
index 60fd91bb5171..c314fdde0097 100644
--- a/net/ipv6/ip6_output.c
+++ b/net/ipv6/ip6_output.c
@@ -547,7 +547,20 @@ int ip6_forward(struct sk_buff *skb)
 	    pneigh_lookup(&nd_tbl, net, &hdr->daddr, skb->dev, 0)) {
 		int proxied = ip6_forward_proxy_check(skb);
 		if (proxied > 0) {
-			hdr->hop_limit--;
+			/* It's tempting to decrease the hop limit
+			 * here by 1, as we do at the end of the
+			 * function too.
+			 *
+			 * But that would be incorrect, as proxying is
+			 * not forwarding.  The ip6_input function
+			 * will handle this packet locally, and it
+			 * depends on the hop limit being unchanged.
+			 *
+			 * One example is the NDP hop limit, that
+			 * always has to stay 255, but other would be
+			 * similar checks around RA packets, where the
+			 * user can even change the desired limit.
+			 */
 			return ip6_input(skb);
 		} else if (proxied < 0) {
 			__IP6_INC_STATS(net, idev, IPSTATS_MIB_INDISCARDS);
diff --git a/net/ipv6/raw.c b/net/ipv6/raw.c
index a06a9f847db5..ada087b50541 100644
--- a/net/ipv6/raw.c
+++ b/net/ipv6/raw.c
@@ -505,6 +505,7 @@ csum_copy_err:
 static int rawv6_push_pending_frames(struct sock *sk, struct flowi6 *fl6,
 				     struct raw6_sock *rp)
 {
+	struct ipv6_txoptions *opt;
 	struct sk_buff *skb;
 	int err = 0;
 	int offset;
@@ -522,6 +523,9 @@ static int rawv6_push_pending_frames(struct sock *sk, struct flowi6 *fl6,
 
 	offset = rp->offset;
 	total_len = inet_sk(sk)->cork.base.length;
+	opt = inet6_sk(sk)->cork.opt;
+	total_len -= opt ? opt->opt_flen : 0;
+
 	if (offset >= total_len - 1) {
 		err = -EINVAL;
 		ip6_flush_pending_frames(sk);
diff --git a/net/ipv6/tcp_ipv6.c b/net/ipv6/tcp_ipv6.c
index 11b736a76bd7..a52a4f12f146 100644
--- a/net/ipv6/tcp_ipv6.c
+++ b/net/ipv6/tcp_ipv6.c
@@ -272,6 +272,7 @@ static int tcp_v6_connect(struct sock *sk, struct sockaddr *uaddr,
 	fl6.flowi6_proto = IPPROTO_TCP;
 	fl6.daddr = sk->sk_v6_daddr;
 	fl6.saddr = saddr ? *saddr : np->saddr;
+	fl6.flowlabel = ip6_make_flowinfo(np->tclass, np->flow_label);
 	fl6.flowi6_oif = sk->sk_bound_dev_if;
 	fl6.flowi6_mark = sk->sk_mark;
 	fl6.fl6_dport = usin->sin6_port;
@@ -1387,14 +1388,11 @@ static struct sock *tcp_v6_syn_recv_sock(const struct sock *sk, struct sk_buff *
 
 		/* Clone pktoptions received with SYN, if we own the req */
 		if (ireq->pktopts) {
-			newnp->pktoptions = skb_clone(ireq->pktopts,
-						      sk_gfp_mask(sk, GFP_ATOMIC));
+			newnp->pktoptions = skb_clone_and_charge_r(ireq->pktopts, newsk);
 			consume_skb(ireq->pktopts);
 			ireq->pktopts = NULL;
-			if (newnp->pktoptions) {
+			if (newnp->pktoptions)
 				tcp_v6_restore_cb(newnp->pktoptions);
-				skb_set_owner_r(newnp->pktoptions, newsk);
-			}
 		}
 	} else {
 		if (!req_unhash && found_dup_sk) {
@@ -1466,7 +1464,7 @@ int tcp_v6_do_rcv(struct sock *sk, struct sk_buff *skb)
 					       --ANK (980728)
 	 */
 	if (np->rxopt.all)
-		opt_skb = skb_clone(skb, sk_gfp_mask(sk, GFP_ATOMIC));
+		opt_skb = skb_clone_and_charge_r(skb, sk);
 
 	reason = SKB_DROP_REASON_NOT_SPECIFIED;
 	if (sk->sk_state == TCP_ESTABLISHED) { /* Fast path */
@@ -1552,7 +1550,6 @@ ipv6_pktoptions:
 		if (np->repflow)
 			np->flow_label = ip6_flowlabel(ipv6_hdr(opt_skb));
 		if (ipv6_opt_accepted(sk, opt_skb, &TCP_SKB_CB(opt_skb)->header.h6)) {
-			skb_set_owner_r(opt_skb, sk);
 			tcp_v6_restore_cb(opt_skb);
 			opt_skb = xchg(&np->pktoptions, opt_skb);
 		} else {