Merge tag 'net-6.0-rc7' of git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net

Pull networking fixes from Jakub Kicinski:
 "Including fixes from wifi, netfilter and can.

  A handful of awaited fixes here - revert of the FEC changes, bluetooth
  fix, fixes for iwlwifi spew.

  We added a warning in PHY/MDIO code which is triggering on a couple of
  platforms in a false-positive-ish way. If we can't iron that out over
  the week we'll drop it and re-add for 6.1.

  I've added a new "follow up fixes" section for fixes to fixes in
  6.0-rcs but it may actually give the false impression that those are
  problematic or that more testing time would have caught them. So
  likely a one time thing.

  Follow up fixes:

   - nf_tables_addchain: fix nft_counters_enabled underflow

   - ebtables: fix memory leak when blob is malformed

   - nf_ct_ftp: fix deadlock when nat rewrite is needed

  Current release - regressions:

   - Revert "fec: Restart PPS after link state change" and the related
     "net: fec: Use a spinlock to guard `fep->ptp_clk_on`"

   - Bluetooth: fix HCIGETDEVINFO regression

   - wifi: mt76: fix 5 GHz connection regression on mt76x0/mt76x2

   - mptcp: fix fwd memory accounting on coalesce

   - rwlock removal fall out:
      - ipmr: always call ip{,6}_mr_forward() from RCU read-side
        critical section
      - ipv6: fix crash when IPv6 is administratively disabled

   - tcp: read multiple skbs in tcp_read_skb()

   - mdio_bus_phy_resume state warning fallout:
      - eth: ravb: fix PHY state warning splat during system resume
      - eth: sh_eth: fix PHY state warning splat during system resume

  Current release - new code bugs:

   - wifi: iwlwifi: don't spam logs with NSS>2 messages

   - eth: mtk_eth_soc: enable XDP support just for MT7986 SoC

  Previous releases - regressions:

   - bonding: fix NULL deref in bond_rr_gen_slave_id

   - wifi: iwlwifi: mark IWLMEI as broken

  Previous releases - always broken:

   - nf_conntrack helpers:
      - irc: tighten matching on DCC message
      - sip: fix ct_sip_walk_headers
      - osf: fix possible bogus match in nf_osf_find()

   - ipvlan: fix out-of-bound bugs caused by unset skb->mac_header

   - core: fix flow symmetric hash

   - bonding, team: unsync device addresses on ndo_stop

   - phy: micrel: fix shared interrupt on LAN8814"

* tag 'net-6.0-rc7' of git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net: (83 commits)
  selftests: forwarding: add shebang for sch_red.sh
  bnxt: prevent skb UAF after handing over to PTP worker
  net: marvell: Fix refcounting bugs in prestera_port_sfp_bind()
  net: sched: fix possible refcount leak in tc_new_tfilter()
  net: sunhme: Fix packet reception for len < RX_COPY_THRESHOLD
  udp: Use WARN_ON_ONCE() in udp_read_skb()
  selftests: bonding: cause oops in bond_rr_gen_slave_id
  bonding: fix NULL deref in bond_rr_gen_slave_id
  net: phy: micrel: fix shared interrupt on LAN8814
  net/smc: Stop the CLC flow if no link to map buffers on
  ice: Fix ice_xdp_xmit() when XDP TX queue number is not sufficient
  net: atlantic: fix potential memory leak in aq_ndev_close()
  can: gs_usb: gs_usb_set_phys_id(): return with error if identify is not supported
  can: gs_usb: gs_can_open(): fix race dev->can.state condition
  can: flexcan: flexcan_mailbox_read() fix return value for drop = true
  net: sh_eth: Fix PHY state warning splat during system resume
  net: ravb: Fix PHY state warning splat during system resume
  netfilter: nf_ct_ftp: fix deadlock when nat rewrite is needed
  netfilter: ebtables: fix memory leak when blob is malformed
  netfilter: nf_tables: fix percpu memory leak at nf_tables_addchain()
  ...

13 files changed, 433 insertions, 14 deletions

diff --git a/tools/testing/selftests/Makefile b/tools/testing/selftests/Makefile
index c2064a35688b..1fc89b8ef433 100644
--- a/tools/testing/selftests/Makefile
+++ b/tools/testing/selftests/Makefile
@@ -13,6 +13,7 @@ TARGETS += damon
 TARGETS += drivers/dma-buf
 TARGETS += drivers/s390x/uvdevice
 TARGETS += drivers/net/bonding
+TARGETS += drivers/net/team
 TARGETS += efivarfs
 TARGETS += exec
 TARGETS += filesystems
diff --git a/tools/testing/selftests/drivers/net/bonding/Makefile b/tools/testing/selftests/drivers/net/bonding/Makefile
index ab6c54b12098..1d866658e541 100644
--- a/tools/testing/selftests/drivers/net/bonding/Makefile
+++ b/tools/testing/selftests/drivers/net/bonding/Makefile
@@ -1,6 +1,10 @@
 # SPDX-License-Identifier: GPL-2.0
 # Makefile for net selftests
 
-TEST_PROGS := bond-break-lacpdu-tx.sh
+TEST_PROGS := bond-break-lacpdu-tx.sh \
+	      dev_addr_lists.sh \
+	      bond-arp-interval-causes-panic.sh
+
+TEST_FILES := lag_lib.sh
 
 include ../../../lib.mk
diff --git a/tools/testing/selftests/drivers/net/bonding/bond-arp-interval-causes-panic.sh b/tools/testing/selftests/drivers/net/bonding/bond-arp-interval-causes-panic.sh
new file mode 100755
index 000000000000..71c00bfafbc9
--- /dev/null
+++ b/tools/testing/selftests/drivers/net/bonding/bond-arp-interval-causes-panic.sh
@@ -0,0 +1,49 @@
+#!/bin/sh
+# SPDX-License-Identifier: GPL-2.0
+#
+# cause kernel oops in bond_rr_gen_slave_id
+DEBUG=${DEBUG:-0}
+
+set -e
+test ${DEBUG} -ne 0 && set -x
+
+finish()
+{
+	ip netns delete server || true
+	ip netns delete client || true
+	ip link del link1_1 || true
+}
+
+trap finish EXIT
+
+client_ip4=192.168.1.198
+server_ip4=192.168.1.254
+
+# setup kernel so it reboots after causing the panic
+echo 180 >/proc/sys/kernel/panic
+
+# build namespaces
+ip link add dev link1_1 type veth peer name link1_2
+
+ip netns add "server"
+ip link set dev link1_2 netns server up name eth0
+ip netns exec server ip addr add ${server_ip4}/24 dev eth0
+
+ip netns add "client"
+ip link set dev link1_1 netns client down name eth0
+ip netns exec client ip link add dev bond0 down type bond mode 1 \
+	miimon 100 all_slaves_active 1
+ip netns exec client ip link set dev eth0 down master bond0
+ip netns exec client ip link set dev bond0 up
+ip netns exec client ip addr add ${client_ip4}/24 dev bond0
+ip netns exec client ping -c 5 $server_ip4 >/dev/null
+
+ip netns exec client ip link set dev eth0 down nomaster
+ip netns exec client ip link set dev bond0 down
+ip netns exec client ip link set dev bond0 type bond mode 0 \
+	arp_interval 1000 arp_ip_target "+${server_ip4}"
+ip netns exec client ip link set dev eth0 down master bond0
+ip netns exec client ip link set dev bond0 up
+ip netns exec client ping -c 5 $server_ip4 >/dev/null
+
+exit 0
diff --git a/tools/testing/selftests/drivers/net/bonding/config b/tools/testing/selftests/drivers/net/bonding/config
index dc1c22de3c92..70638fa50b2c 100644
--- a/tools/testing/selftests/drivers/net/bonding/config
+++ b/tools/testing/selftests/drivers/net/bonding/config
@@ -1 +1,2 @@
 CONFIG_BONDING=y
+CONFIG_MACVLAN=y
diff --git a/tools/testing/selftests/drivers/net/bonding/dev_addr_lists.sh b/tools/testing/selftests/drivers/net/bonding/dev_addr_lists.sh
new file mode 100755
index 000000000000..e6fa24eded5b
--- /dev/null
+++ b/tools/testing/selftests/drivers/net/bonding/dev_addr_lists.sh
@@ -0,0 +1,109 @@
+#!/bin/bash
+# SPDX-License-Identifier: GPL-2.0
+#
+# Test bond device handling of addr lists (dev->uc, mc)
+#
+
+ALL_TESTS="
+	bond_cleanup_mode1
+	bond_cleanup_mode4
+	bond_listen_lacpdu_multicast_case_down
+	bond_listen_lacpdu_multicast_case_up
+"
+
+REQUIRE_MZ=no
+NUM_NETIFS=0
+lib_dir=$(dirname "$0")
+source "$lib_dir"/../../../net/forwarding/lib.sh
+
+source "$lib_dir"/lag_lib.sh
+
+
+destroy()
+{
+	local ifnames=(dummy1 dummy2 bond1 mv0)
+	local ifname
+
+	for ifname in "${ifnames[@]}"; do
+		ip link del "$ifname" &>/dev/null
+	done
+}
+
+cleanup()
+{
+	pre_cleanup
+
+	destroy
+}
+
+
+# bond driver control paths vary between modes that have a primary slave
+# (bond_uses_primary()) and others. Test both kinds of modes.
+
+bond_cleanup_mode1()
+{
+	RET=0
+
+	test_LAG_cleanup "bonding" "active-backup"
+}
+
+bond_cleanup_mode4() {
+	RET=0
+
+	test_LAG_cleanup "bonding" "802.3ad"
+}
+
+bond_listen_lacpdu_multicast()
+{
+	# Initial state of bond device, up | down
+	local init_state=$1
+	local lacpdu_mc="01:80:c2:00:00:02"
+
+	ip link add dummy1 type dummy
+	ip link add bond1 "$init_state" type bond mode 802.3ad
+	ip link set dev dummy1 master bond1
+	if [ "$init_state" = "down" ]; then
+		ip link set dev bond1 up
+	fi
+
+	grep_bridge_fdb "$lacpdu_mc" bridge fdb show brport dummy1 >/dev/null
+	check_err $? "LACPDU multicast address not present on slave (1)"
+
+	ip link set dev bond1 down
+
+	not grep_bridge_fdb "$lacpdu_mc" bridge fdb show brport dummy1 >/dev/null
+	check_err $? "LACPDU multicast address still present on slave"
+
+	ip link set dev bond1 up
+
+	grep_bridge_fdb "$lacpdu_mc" bridge fdb show brport dummy1 >/dev/null
+	check_err $? "LACPDU multicast address not present on slave (2)"
+
+	cleanup
+
+	log_test "bonding LACPDU multicast address to slave (from bond $init_state)"
+}
+
+# The LACPDU mc addr is added by different paths depending on the initial state
+# of the bond when enslaving a device. Test both cases.
+
+bond_listen_lacpdu_multicast_case_down()
+{
+	RET=0
+
+	bond_listen_lacpdu_multicast "down"
+}
+
+bond_listen_lacpdu_multicast_case_up()
+{
+	RET=0
+
+	bond_listen_lacpdu_multicast "up"
+}
+
+
+trap cleanup EXIT
+
+tests_run
+
+exit "$EXIT_STATUS"
diff --git a/tools/testing/selftests/drivers/net/bonding/lag_lib.sh b/tools/testing/selftests/drivers/net/bonding/lag_lib.sh
new file mode 100644
index 000000000000..16c7fb858ac1
--- /dev/null
+++ b/tools/testing/selftests/drivers/net/bonding/lag_lib.sh
@@ -0,0 +1,61 @@
+#!/bin/bash
+# SPDX-License-Identifier: GPL-2.0
+
+# Test that a link aggregation device (bonding, team) removes the hardware
+# addresses that it adds on its underlying devices.
+test_LAG_cleanup()
+{
+	local driver=$1
+	local mode=$2
+	local ucaddr="02:00:00:12:34:56"
+	local addr6="fe80::78:9abc/64"
+	local mcaddr="33:33:ff:78:9a:bc"
+	local name
+
+	ip link add dummy1 type dummy
+	ip link add dummy2 type dummy
+	if [ "$driver" = "bonding" ]; then
+		name="bond1"
+		ip link add "$name" up type bond mode "$mode"
+		ip link set dev dummy1 master "$name"
+		ip link set dev dummy2 master "$name"
+	elif [ "$driver" = "team" ]; then
+		name="team0"
+		teamd -d -c '
+			{
+				"device": "'"$name"'",
+				"runner": {
+					"name": "'"$mode"'"
+				},
+				"ports": {
+					"dummy1":
+						{},
+					"dummy2":
+						{}
+				}
+			}
+		'
+		ip link set dev "$name" up
+	else
+		check_err 1
+		log_test test_LAG_cleanup ": unknown driver \"$driver\""
+		return
+	fi
+
+	# Used to test dev->uc handling
+	ip link add mv0 link "$name" up address "$ucaddr" type macvlan
+	# Used to test dev->mc handling
+	ip address add "$addr6" dev "$name"
+	ip link set dev "$name" down
+	ip link del "$name"
+
+	not grep_bridge_fdb "$ucaddr" bridge fdb show >/dev/null
+	check_err $? "macvlan unicast address still present on a slave"
+
+	not grep_bridge_fdb "$mcaddr" bridge fdb show >/dev/null
+	check_err $? "IPv6 solicited-node multicast mac address still present on a slave"
+
+	cleanup
+
+	log_test "$driver cleanup mode $mode"
+}
diff --git a/tools/testing/selftests/drivers/net/team/Makefile b/tools/testing/selftests/drivers/net/team/Makefile
new file mode 100644
index 000000000000..642d8df1c137
--- /dev/null
+++ b/tools/testing/selftests/drivers/net/team/Makefile
@@ -0,0 +1,6 @@
+# SPDX-License-Identifier: GPL-2.0
+# Makefile for net selftests
+
+TEST_PROGS := dev_addr_lists.sh
+
+include ../../../lib.mk
diff --git a/tools/testing/selftests/drivers/net/team/config b/tools/testing/selftests/drivers/net/team/config
new file mode 100644
index 000000000000..265b6882cc21
--- /dev/null
+++ b/tools/testing/selftests/drivers/net/team/config
@@ -0,0 +1,3 @@
+CONFIG_NET_TEAM=y
+CONFIG_NET_TEAM_MODE_LOADBALANCE=y
+CONFIG_MACVLAN=y
diff --git a/tools/testing/selftests/drivers/net/team/dev_addr_lists.sh b/tools/testing/selftests/drivers/net/team/dev_addr_lists.sh
new file mode 100755
index 000000000000..debda7262956
--- /dev/null
+++ b/tools/testing/selftests/drivers/net/team/dev_addr_lists.sh
@@ -0,0 +1,51 @@
+#!/bin/bash
+# SPDX-License-Identifier: GPL-2.0
+#
+# Test team device handling of addr lists (dev->uc, mc)
+#
+
+ALL_TESTS="
+	team_cleanup
+"
+
+REQUIRE_MZ=no
+NUM_NETIFS=0
+lib_dir=$(dirname "$0")
+source "$lib_dir"/../../../net/forwarding/lib.sh
+
+source "$lib_dir"/../bonding/lag_lib.sh
+
+
+destroy()
+{
+	local ifnames=(dummy0 dummy1 team0 mv0)
+	local ifname
+
+	for ifname in "${ifnames[@]}"; do
+		ip link del "$ifname" &>/dev/null
+	done
+}
+
+cleanup()
+{
+	pre_cleanup
+
+	destroy
+}
+
+
+team_cleanup()
+{
+	RET=0
+
+	test_LAG_cleanup "team" "lacp"
+}
+
+
+require_command teamd
+
+trap cleanup EXIT
+
+tests_run
+
+exit "$EXIT_STATUS"
diff --git a/tools/testing/selftests/net/forwarding/router_multicast.sh b/tools/testing/selftests/net/forwarding/router_multicast.sh
index 57e90c873a2c..5a58b1ec8aef 100755
--- a/tools/testing/selftests/net/forwarding/router_multicast.sh
+++ b/tools/testing/selftests/net/forwarding/router_multicast.sh
@@ -28,7 +28,7 @@
 # +------------------+       +------------------+
 #
 
-ALL_TESTS="mcast_v4 mcast_v6 rpf_v4 rpf_v6"
+ALL_TESTS="mcast_v4 mcast_v6 rpf_v4 rpf_v6 unres_v4 unres_v6"
 NUM_NETIFS=6
 source lib.sh
 source tc_common.sh
@@ -406,6 +406,96 @@ rpf_v6()
 	log_test "RPF IPv6"
 }
 
+unres_v4()
+{
+	# Send a multicast packet not corresponding to an installed route,
+	# causing the kernel to queue the packet for resolution and emit an
+	# IGMPMSG_NOCACHE notification. smcrouted will react to this
+	# notification by consulting its (*, G) list and installing an (S, G)
+	# route, which will be used to forward the queued packet.
+
+	RET=0
+
+	tc filter add dev $h2 ingress protocol ip pref 1 handle 1 flower \
+		dst_ip 225.1.2.3 ip_proto udp dst_port 12345 action drop
+	tc filter add dev $h3 ingress protocol ip pref 1 handle 1 flower \
+		dst_ip 225.1.2.3 ip_proto udp dst_port 12345 action drop
+
+	# Forwarding should fail before installing a matching (*, G).
+	$MZ $h1 -c 1 -p 128 -t udp "ttl=10,sp=54321,dp=12345" \
+		-a 00:11:22:33:44:55 -b 01:00:5e:01:02:03 \
+		-A 198.51.100.2 -B 225.1.2.3 -q
+
+	tc_check_packets "dev $h2 ingress" 1 0
+	check_err $? "Multicast received on first host when should not"
+	tc_check_packets "dev $h3 ingress" 1 0
+	check_err $? "Multicast received on second host when should not"
+
+	# Create (*, G). Will not be installed in the kernel.
+	create_mcast_sg $rp1 0.0.0.0 225.1.2.3 $rp2 $rp3
+
+	$MZ $h1 -c 1 -p 128 -t udp "ttl=10,sp=54321,dp=12345" \
+		-a 00:11:22:33:44:55 -b 01:00:5e:01:02:03 \
+		-A 198.51.100.2 -B 225.1.2.3 -q
+
+	tc_check_packets "dev $h2 ingress" 1 1
+	check_err $? "Multicast not received on first host"
+	tc_check_packets "dev $h3 ingress" 1 1
+	check_err $? "Multicast not received on second host"
+
+	delete_mcast_sg $rp1 0.0.0.0 225.1.2.3 $rp2 $rp3
+
+	tc filter del dev $h3 ingress protocol ip pref 1 handle 1 flower
+	tc filter del dev $h2 ingress protocol ip pref 1 handle 1 flower
+
+	log_test "Unresolved queue IPv4"
+}
+
+unres_v6()
+{
+	# Send a multicast packet not corresponding to an installed route,
+	# causing the kernel to queue the packet for resolution and emit an
+	# MRT6MSG_NOCACHE notification. smcrouted will react to this
+	# notification by consulting its (*, G) list and installing an (S, G)
+	# route, which will be used to forward the queued packet.
+
+	RET=0
+
+	tc filter add dev $h2 ingress protocol ipv6 pref 1 handle 1 flower \
+		dst_ip ff0e::3 ip_proto udp dst_port 12345 action drop
+	tc filter add dev $h3 ingress protocol ipv6 pref 1 handle 1 flower \
+		dst_ip ff0e::3 ip_proto udp dst_port 12345 action drop
+
+	# Forwarding should fail before installing a matching (*, G).
+	$MZ $h1 -6 -c 1 -p 128 -t udp "ttl=10,sp=54321,dp=12345" \
+		-a 00:11:22:33:44:55 -b 33:33:00:00:00:03 \
+		-A 2001:db8:1::2 -B ff0e::3 -q
+
+	tc_check_packets "dev $h2 ingress" 1 0
+	check_err $? "Multicast received on first host when should not"
+	tc_check_packets "dev $h3 ingress" 1 0
+	check_err $? "Multicast received on second host when should not"
+
+	# Create (*, G). Will not be installed in the kernel.
+	create_mcast_sg $rp1 :: ff0e::3 $rp2 $rp3
+
+	$MZ $h1 -6 -c 1 -p 128 -t udp "ttl=10,sp=54321,dp=12345" \
+		-a 00:11:22:33:44:55 -b 33:33:00:00:00:03 \
+		-A 2001:db8:1::2 -B ff0e::3 -q
+
+	tc_check_packets "dev $h2 ingress" 1 1
+	check_err $? "Multicast not received on first host"
+	tc_check_packets "dev $h3 ingress" 1 1
+	check_err $? "Multicast not received on second host"
+
+	delete_mcast_sg $rp1 :: ff0e::3 $rp2 $rp3
+
+	tc filter del dev $h3 ingress protocol ipv6 pref 1 handle 1 flower
+	tc filter del dev $h2 ingress protocol ipv6 pref 1 handle 1 flower
+
+	log_test "Unresolved queue IPv6"
+}
+
 trap cleanup EXIT
 
 setup_prepare
diff --git a/tools/testing/selftests/net/forwarding/sch_red.sh b/tools/testing/selftests/net/forwarding/sch_red.sh
index e714bae473fb..81f31179ac88 100755
--- a/tools/testing/selftests/net/forwarding/sch_red.sh
+++ b/tools/testing/selftests/net/forwarding/sch_red.sh
@@ -1,3 +1,4 @@
+#!/bin/bash
 # SPDX-License-Identifier: GPL-2.0
 
 # This test sends one stream of traffic from H1 through a TBF shaper, to a RED
diff --git a/tools/testing/selftests/netfilter/nft_concat_range.sh b/tools/testing/selftests/netfilter/nft_concat_range.sh
index a6991877e50c..e908009576c7 100755
--- a/tools/testing/selftests/netfilter/nft_concat_range.sh
+++ b/tools/testing/selftests/netfilter/nft_concat_range.sh
@@ -91,7 +91,7 @@ src
 start		1
 count		5
 src_delta	2000
-tools		sendip nc bash
+tools		sendip socat nc bash
 proto		udp
 
 race_repeat	3
@@ -116,7 +116,7 @@ src
 start		10
 count		5
 src_delta	2000
-tools		sendip nc bash
+tools		sendip socat nc bash
 proto		udp6
 
 race_repeat	3
@@ -141,7 +141,7 @@ src
 start		1
 count		5
 src_delta	2000
-tools		sendip nc bash
+tools		sendip socat nc bash
 proto		udp
 
 race_repeat	0
@@ -163,7 +163,7 @@ src		mac
 start		10
 count		5
 src_delta	2000
-tools		sendip nc bash
+tools		sendip socat nc bash
 proto		udp6
 
 race_repeat	0
@@ -185,7 +185,7 @@ src		mac proto
 start		10
 count		5
 src_delta	2000
-tools		sendip nc bash
+tools		sendip socat nc bash
 proto		udp6
 
 race_repeat	0
@@ -207,7 +207,7 @@ src		addr4
 start		1
 count		5
 src_delta	2000
-tools		sendip nc bash
+tools		sendip socat nc bash
 proto		udp
 
 race_repeat	3
@@ -227,7 +227,7 @@ src		addr6 port
 start		10
 count		5
 src_delta	2000
-tools		sendip nc
+tools		sendip socat nc
 proto		udp6
 
 race_repeat	3
@@ -247,7 +247,7 @@ src		mac proto addr4
 start		1
 count		5
 src_delta	2000
-tools		sendip nc bash
+tools		sendip socat nc bash
 proto		udp
 
 race_repeat	0
@@ -264,7 +264,7 @@ src		mac
 start		1
 count		5
 src_delta	2000
-tools		sendip nc bash
+tools		sendip socat nc bash
 proto		udp
 
 race_repeat	0
@@ -286,7 +286,7 @@ src		mac addr4
 start		1
 count		5
 src_delta	2000
-tools		sendip nc bash
+tools		sendip socat nc bash
 proto		udp
 
 race_repeat	0
@@ -337,7 +337,7 @@ src		addr4
 start		1
 count		5
 src_delta	2000
-tools		sendip nc
+tools		sendip socat nc
 proto		udp
 
 race_repeat	3
@@ -363,7 +363,7 @@ src		mac
 start		1
 count		1
 src_delta	2000
-tools		sendip nc bash
+tools		sendip socat nc bash
 proto		udp
 
 race_repeat	0
@@ -541,6 +541,24 @@ setup_send_udp() {
 			dst_port=
 			src_addr4=
 		}
+	elif command -v socat -v >/dev/null; then
+		send_udp() {
+			if [ -n "${src_addr4}" ]; then
+				B ip addr add "${src_addr4}" dev veth_b
+				__socatbind=",bind=${src_addr4}"
+				if [ -n "${src_port}" ];then
+					__socatbind="${__socatbind}:${src_port}"
+				fi
+			fi
+
+			ip addr add "${dst_addr4}" dev veth_a 2>/dev/null
+			[ -z "${dst_port}" ] && dst_port=12345
+
+			echo "test4" | B socat -t 0.01 STDIN UDP4-DATAGRAM:${dst_addr4}:${dst_port}"${__socatbind}"
+
+			src_addr4=
+			src_port=
+		}
 	elif command -v nc >/dev/null; then
 		if nc -u -w0 1.1.1.1 1 2>/dev/null; then
 			# OpenBSD netcat
@@ -606,6 +624,29 @@ setup_send_udp6() {
 			dst_port=
 			src_addr6=
 		}
+	elif command -v socat -v >/dev/null; then
+		send_udp6() {
+			ip -6 addr add "${dst_addr6}" dev veth_a nodad \
+				2>/dev/null
+
+			__socatbind6=
+
+			if [ -n "${src_addr6}" ]; then
+				if [ -n "${src_addr6} != "${src_addr6_added} ]; then
+					B ip addr add "${src_addr6}" dev veth_b nodad
+
+					src_addr6_added=${src_addr6}
+				fi
+
+				__socatbind6=",bind=[${src_addr6}]"
+
+				if [ -n "${src_port}" ] ;then
+					__socatbind6="${__socatbind6}:${src_port}"
+				fi
+			fi
+
+			echo "test6" | B socat -t 0.01 STDIN UDP6-DATAGRAM:[${dst_addr6}]:${dst_port}"${__socatbind6}"
+		}
 	elif command -v nc >/dev/null && nc -u -w0 1.1.1.1 1 2>/dev/null; then
 		# GNU netcat might not work with IPv6, try next tool
 		send_udp6() {
diff --git a/tools/testing/selftests/wireguard/qemu/Makefile b/tools/testing/selftests/wireguard/qemu/Makefile
index fda76282d34b..e95bd56b332f 100644
--- a/tools/testing/selftests/wireguard/qemu/Makefile
+++ b/tools/testing/selftests/wireguard/qemu/Makefile
@@ -343,8 +343,10 @@ $(KERNEL_BZIMAGE): $(TOOLCHAIN_PATH)/.installed $(KERNEL_BUILD_PATH)/.config $(B
 .PHONY: $(KERNEL_BZIMAGE)
 
 $(TOOLCHAIN_PATH)/$(CHOST)/include/linux/.installed: | $(KERNEL_BUILD_PATH)/.config $(TOOLCHAIN_PATH)/.installed
+ifneq ($(ARCH),um)
 	rm -rf $(TOOLCHAIN_PATH)/$(CHOST)/include/linux
 	$(MAKE) -C $(KERNEL_PATH) O=$(KERNEL_BUILD_PATH) INSTALL_HDR_PATH=$(TOOLCHAIN_PATH)/$(CHOST) ARCH=$(KERNEL_ARCH) CROSS_COMPILE=$(CROSS_COMPILE) headers_install
+endif
 	touch $@
 
 $(TOOLCHAIN_PATH)/.installed: $(TOOLCHAIN_TAR)