Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net

Pull networking fixes from David Miller:

 1) Fix sk_psock reference count leak on receive, from Xiyu Yang.

 2) CONFIG_HNS should be invisible, from Geert Uytterhoeven.

 3) Don't allow locking route MTUs in ipv6, RFCs actually forbid this,
    from Maciej Żenczykowski.

 4) ipv4 route redirect backoff wasn't actually enforced, from Paolo
    Abeni.

 5) Fix netprio cgroup v2 leak, from Zefan Li.

 6) Fix infinite loop on rmmod in conntrack, from Florian Westphal.

 7) Fix tcp SO_RCVLOWAT hangs, from Eric Dumazet.

 8) Various bpf probe handling fixes, from Daniel Borkmann.

* git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net: (68 commits)
  selftests: mptcp: pm: rm the right tmp file
  dpaa2-eth: properly handle buffer size restrictions
  bpf: Restrict bpf_trace_printk()'s %s usage and add %pks, %pus specifier
  bpf: Add bpf_probe_read_{user, kernel}_str() to do_refine_retval_range
  bpf: Restrict bpf_probe_read{, str}() only to archs where they work
  MAINTAINERS: Mark networking drivers as Maintained.
  ipmr: Add lockdep expression to ipmr_for_each_table macro
  ipmr: Fix RCU list debugging warning
  drivers: net: hamradio: Fix suspicious RCU usage warning in bpqether.c
  net: phy: broadcom: fix BCM54XX_SHD_SCR3_TRDDAPD value for BCM54810
  tcp: fix error recovery in tcp_zerocopy_receive()
  MAINTAINERS: Add Jakub to networking drivers.
  MAINTAINERS: another add of Karsten Graul for S390 networking
  drivers: ipa: fix typos for ipa_smp2p structure doc
  pppoe: only process PADT targeted at local interfaces
  selftests/bpf: Enforce returning 0 for fentry/fexit programs
  bpf: Enforce returning 0 for fentry/fexit progs
  net: stmmac: fix num_por initialization
  security: Fix the default value of secid_to_secctx hook
  libbpf: Fix register naming in PT_REGS s390 macros
  ...

1 files changed, 4 insertions, 14 deletions

diff --git a/drivers/net/bareudp.c b/drivers/net/bareudp.c
index cc0703c3d57f..efd1a1d1f35e 100644
--- a/drivers/net/bareudp.c
+++ b/drivers/net/bareudp.c
@@ -136,25 +136,21 @@ static int bareudp_udp_encap_recv(struct sock *sk, struct sk_buff *skb)
 	oiph = skb_network_header(skb);
 	skb_reset_network_header(skb);
 
-	if (family == AF_INET)
+	if (!IS_ENABLED(CONFIG_IPV6) || family == AF_INET)
 		err = IP_ECN_decapsulate(oiph, skb);
-#if IS_ENABLED(CONFIG_IPV6)
 	else
 		err = IP6_ECN_decapsulate(oiph, skb);
-#endif
 
 	if (unlikely(err)) {
 		if (log_ecn_error) {
-			if  (family == AF_INET)
+			if  (!IS_ENABLED(CONFIG_IPV6) || family == AF_INET)
 				net_info_ratelimited("non-ECT from %pI4 "
 						     "with TOS=%#x\n",
 						     &((struct iphdr *)oiph)->saddr,
 						     ((struct iphdr *)oiph)->tos);
-#if IS_ENABLED(CONFIG_IPV6)
 			else
 				net_info_ratelimited("non-ECT from %pI6\n",
 						     &((struct ipv6hdr *)oiph)->saddr);
-#endif
 		}
 		if (err > 1) {
 			++bareudp->dev->stats.rx_frame_errors;
@@ -350,7 +346,6 @@ free_dst:
 	return err;
 }
 
-#if IS_ENABLED(CONFIG_IPV6)
 static int bareudp6_xmit_skb(struct sk_buff *skb, struct net_device *dev,
 			     struct bareudp_dev *bareudp,
 			     const struct ip_tunnel_info *info)
@@ -411,7 +406,6 @@ free_dst:
 	dst_release(dst);
 	return err;
 }
-#endif
 
 static netdev_tx_t bareudp_xmit(struct sk_buff *skb, struct net_device *dev)
 {
@@ -435,11 +429,9 @@ static netdev_tx_t bareudp_xmit(struct sk_buff *skb, struct net_device *dev)
 	}
 
 	rcu_read_lock();
-#if IS_ENABLED(CONFIG_IPV6)
-	if (info->mode & IP_TUNNEL_INFO_IPV6)
+	if (IS_ENABLED(CONFIG_IPV6) && info->mode & IP_TUNNEL_INFO_IPV6)
 		err = bareudp6_xmit_skb(skb, dev, bareudp, info);
 	else
-#endif
 		err = bareudp_xmit_skb(skb, dev, bareudp, info);
 
 	rcu_read_unlock();
@@ -467,7 +459,7 @@ static int bareudp_fill_metadata_dst(struct net_device *dev,
 
 	use_cache = ip_tunnel_dst_cache_usable(skb, info);
 
-	if (ip_tunnel_info_af(info) == AF_INET) {
+	if (!IS_ENABLED(CONFIG_IPV6) || ip_tunnel_info_af(info) == AF_INET) {
 		struct rtable *rt;
 		__be32 saddr;
 
@@ -478,7 +470,6 @@ static int bareudp_fill_metadata_dst(struct net_device *dev,
 
 		ip_rt_put(rt);
 		info->key.u.ipv4.src = saddr;
-#if IS_ENABLED(CONFIG_IPV6)
 	} else if (ip_tunnel_info_af(info) == AF_INET6) {
 		struct dst_entry *dst;
 		struct in6_addr saddr;
@@ -492,7 +483,6 @@ static int bareudp_fill_metadata_dst(struct net_device *dev,
 
 		dst_release(dst);
 		info->key.u.ipv6.src = saddr;
-#endif
 	} else {
 		return -EINVAL;
 	}