Merge tag 'net-6.2-rc7' of git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net

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

  Current release - regressions:

   - phy: fix null-deref in phy_attach_direct

   - mac802154: fix possible double free upon parsing error

  Previous releases - regressions:

   - bpf: preserve reg parent/live fields when copying range info,
     prevent mis-verification of programs as safe

   - ip6: fix GRE tunnels not generating IPv6 link local addresses

   - phy: dp83822: fix null-deref on DP83825/DP83826 devices

   - sctp: do not check hb_timer.expires when resetting hb_timer

   - eth: mtk_sock: fix SGMII configuration after phylink conversion

  Previous releases - always broken:

   - eth: xdp: execute xdp_do_flush() before napi_complete_done()

   - skb: do not mix page pool and page referenced frags in GRO

   - bpf:
      - fix a possible task gone issue with bpf_send_signal[_thread]()
      - fix an off-by-one bug in bpf_mem_cache_idx() to select the right
        cache
      - add missing btf_put to register_btf_id_dtor_kfuncs
      - sockmap: fon't let sock_map_{close,destroy,unhash} call itself

   - gso: fix null-deref in skb_segment_list()

   - mctp: purge receive queues on sk destruction

   - fix UaF caused by accept on already connected socket in exotic
     socket families

   - tls: don't treat list head as an entry in tls_is_tx_ready()

   - netfilter: br_netfilter: disable sabotage_in hook after first
     suppression

   - wwan: t7xx: fix runtime PM implementation

  Misc:

   - MAINTAINERS: spring cleanup of networking maintainers"

* tag 'net-6.2-rc7' of git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net: (65 commits)
  mtk_sgmii: enable PCS polling to allow SFP work
  net: mediatek: sgmii: fix duplex configuration
  net: mediatek: sgmii: ensure the SGMII PHY is powered down on configuration
  MAINTAINERS: update SCTP maintainers
  MAINTAINERS: ipv6: retire Hideaki Yoshifuji
  mailmap: add John Crispin's entry
  MAINTAINERS: bonding: move Veaceslav Falico to CREDITS
  net: openvswitch: fix flow memory leak in ovs_flow_cmd_new
  net: ethernet: mtk_eth_soc: disable hardware DSA untagging for second MAC
  virtio-net: Keep stop() to follow mirror sequence of open()
  selftests: net: udpgso_bench_tx: Cater for pending datagrams zerocopy benchmarking
  selftests: net: udpgso_bench: Fix racing bug between the rx/tx programs
  selftests: net: udpgso_bench_rx/tx: Stop when wrong CLI args are provided
  selftests: net: udpgso_bench_rx: Fix 'used uninitialized' compiler warning
  can: mcp251xfd: mcp251xfd_ring_set_ringparam(): assign missing tx_obj_num_coalesce_irq
  can: isotp: split tx timer into transmission and timeout
  can: isotp: handle wait_event_interruptible() return values
  can: raw: fix CAN FD frame transmissions over CAN XL devices
  can: j1939: fix errant WARN_ON_ONCE in j1939_session_deactivate
  hv_netvsc: Fix missed pagebuf entries in netvsc_dma_map/unmap()
  ...

19 files changed, 182 insertions, 130 deletions

diff --git a/net/bridge/br_netfilter_hooks.c b/net/bridge/br_netfilter_hooks.c
index f20f4373ff40..9554abcfd5b4 100644
--- a/net/bridge/br_netfilter_hooks.c
+++ b/net/bridge/br_netfilter_hooks.c
@@ -871,6 +871,7 @@ static unsigned int ip_sabotage_in(void *priv,
 	if (nf_bridge && !nf_bridge->in_prerouting &&
 	    !netif_is_l3_master(skb->dev) &&
 	    !netif_is_l3_slave(skb->dev)) {
+		nf_bridge_info_free(skb);
 		state->okfn(state->net, state->sk, skb);
 		return NF_STOLEN;
 	}
diff --git a/net/can/isotp.c b/net/can/isotp.c
index 608f8c24ae46..fc81d77724a1 100644
--- a/net/can/isotp.c
+++ b/net/can/isotp.c
@@ -140,7 +140,7 @@ struct isotp_sock {
 	canid_t rxid;
 	ktime_t tx_gap;
 	ktime_t lastrxcf_tstamp;
-	struct hrtimer rxtimer, txtimer;
+	struct hrtimer rxtimer, txtimer, txfrtimer;
 	struct can_isotp_options opt;
 	struct can_isotp_fc_options rxfc, txfc;
 	struct can_isotp_ll_options ll;
@@ -871,7 +871,7 @@ static void isotp_rcv_echo(struct sk_buff *skb, void *data)
 	}
 
 	/* start timer to send next consecutive frame with correct delay */
-	hrtimer_start(&so->txtimer, so->tx_gap, HRTIMER_MODE_REL_SOFT);
+	hrtimer_start(&so->txfrtimer, so->tx_gap, HRTIMER_MODE_REL_SOFT);
 }
 
 static enum hrtimer_restart isotp_tx_timer_handler(struct hrtimer *hrtimer)
@@ -879,49 +879,39 @@ static enum hrtimer_restart isotp_tx_timer_handler(struct hrtimer *hrtimer)
 	struct isotp_sock *so = container_of(hrtimer, struct isotp_sock,
 					     txtimer);
 	struct sock *sk = &so->sk;
-	enum hrtimer_restart restart = HRTIMER_NORESTART;
 
-	switch (so->tx.state) {
-	case ISOTP_SENDING:
-
-		/* cfecho should be consumed by isotp_rcv_echo() here */
-		if (!so->cfecho) {
-			/* start timeout for unlikely lost echo skb */
-			hrtimer_set_expires(&so->txtimer,
-					    ktime_add(ktime_get(),
-						      ktime_set(ISOTP_ECHO_TIMEOUT, 0)));
-			restart = HRTIMER_RESTART;
+	/* don't handle timeouts in IDLE state */
+	if (so->tx.state == ISOTP_IDLE)
+		return HRTIMER_NORESTART;
 
-			/* push out the next consecutive frame */
-			isotp_send_cframe(so);
-			break;
-		}
+	/* we did not get any flow control or echo frame in time */
 
-		/* cfecho has not been cleared in isotp_rcv_echo() */
-		pr_notice_once("can-isotp: cfecho %08X timeout\n", so->cfecho);
-		fallthrough;
+	/* report 'communication error on send' */
+	sk->sk_err = ECOMM;
+	if (!sock_flag(sk, SOCK_DEAD))
+		sk_error_report(sk);
 
-	case ISOTP_WAIT_FC:
-	case ISOTP_WAIT_FIRST_FC:
+	/* reset tx state */
+	so->tx.state = ISOTP_IDLE;
+	wake_up_interruptible(&so->wait);
 
-		/* we did not get any flow control frame in time */
+	return HRTIMER_NORESTART;
+}
 
-		/* report 'communication error on send' */
-		sk->sk_err = ECOMM;
-		if (!sock_flag(sk, SOCK_DEAD))
-			sk_error_report(sk);
+static enum hrtimer_restart isotp_txfr_timer_handler(struct hrtimer *hrtimer)
+{
+	struct isotp_sock *so = container_of(hrtimer, struct isotp_sock,
+					     txfrtimer);
 
-		/* reset tx state */
-		so->tx.state = ISOTP_IDLE;
-		wake_up_interruptible(&so->wait);
-		break;
+	/* start echo timeout handling and cover below protocol error */
+	hrtimer_start(&so->txtimer, ktime_set(ISOTP_ECHO_TIMEOUT, 0),
+		      HRTIMER_MODE_REL_SOFT);
 
-	default:
-		WARN_ONCE(1, "can-isotp: tx timer state %08X cfecho %08X\n",
-			  so->tx.state, so->cfecho);
-	}
+	/* cfecho should be consumed by isotp_rcv_echo() here */
+	if (so->tx.state == ISOTP_SENDING && !so->cfecho)
+		isotp_send_cframe(so);
 
-	return restart;
+	return HRTIMER_NORESTART;
 }
 
 static int isotp_sendmsg(struct socket *sock, struct msghdr *msg, size_t size)
@@ -1162,6 +1152,10 @@ static int isotp_release(struct socket *sock)
 	/* wait for complete transmission of current pdu */
 	wait_event_interruptible(so->wait, so->tx.state == ISOTP_IDLE);
 
+	/* force state machines to be idle also when a signal occurred */
+	so->tx.state = ISOTP_IDLE;
+	so->rx.state = ISOTP_IDLE;
+
 	spin_lock(&isotp_notifier_lock);
 	while (isotp_busy_notifier == so) {
 		spin_unlock(&isotp_notifier_lock);
@@ -1194,6 +1188,7 @@ static int isotp_release(struct socket *sock)
 		}
 	}
 
+	hrtimer_cancel(&so->txfrtimer);
 	hrtimer_cancel(&so->txtimer);
 	hrtimer_cancel(&so->rxtimer);
 
@@ -1597,6 +1592,8 @@ static int isotp_init(struct sock *sk)
 	so->rxtimer.function = isotp_rx_timer_handler;
 	hrtimer_init(&so->txtimer, CLOCK_MONOTONIC, HRTIMER_MODE_REL_SOFT);
 	so->txtimer.function = isotp_tx_timer_handler;
+	hrtimer_init(&so->txfrtimer, CLOCK_MONOTONIC, HRTIMER_MODE_REL_SOFT);
+	so->txfrtimer.function = isotp_txfr_timer_handler;
 
 	init_waitqueue_head(&so->wait);
 	spin_lock_init(&so->rx_lock);
diff --git a/net/can/j1939/transport.c b/net/can/j1939/transport.c
index 5c722b55fe23..fce9b9ebf13f 100644
--- a/net/can/j1939/transport.c
+++ b/net/can/j1939/transport.c
@@ -1092,10 +1092,6 @@ static bool j1939_session_deactivate(struct j1939_session *session)
 	bool active;
 
 	j1939_session_list_lock(priv);
-	/* This function should be called with a session ref-count of at
-	 * least 2.
-	 */
-	WARN_ON_ONCE(kref_read(&session->kref) < 2);
 	active = j1939_session_deactivate_locked(session);
 	j1939_session_list_unlock(priv);
 
diff --git a/net/can/raw.c b/net/can/raw.c
index 81071cdb0301..ba86782ba8bb 100644
--- a/net/can/raw.c
+++ b/net/can/raw.c
@@ -132,8 +132,8 @@ static void raw_rcv(struct sk_buff *oskb, void *data)
 		return;
 
 	/* make sure to not pass oversized frames to the socket */
-	if ((can_is_canfd_skb(oskb) && !ro->fd_frames && !ro->xl_frames) ||
-	    (can_is_canxl_skb(oskb) && !ro->xl_frames))
+	if ((!ro->fd_frames && can_is_canfd_skb(oskb)) ||
+	    (!ro->xl_frames && can_is_canxl_skb(oskb)))
 		return;
 
 	/* eliminate multiple filter matches for the same skb */
@@ -670,6 +670,11 @@ static int raw_setsockopt(struct socket *sock, int level, int optname,
 		if (copy_from_sockptr(&ro->fd_frames, optval, optlen))
 			return -EFAULT;
 
+		/* Enabling CAN XL includes CAN FD */
+		if (ro->xl_frames && !ro->fd_frames) {
+			ro->fd_frames = ro->xl_frames;
+			return -EINVAL;
+		}
 		break;
 
 	case CAN_RAW_XL_FRAMES:
@@ -679,6 +684,9 @@ static int raw_setsockopt(struct socket *sock, int level, int optname,
 		if (copy_from_sockptr(&ro->xl_frames, optval, optlen))
 			return -EFAULT;
 
+		/* Enabling CAN XL includes CAN FD */
+		if (ro->xl_frames)
+			ro->fd_frames = ro->xl_frames;
 		break;
 
 	case CAN_RAW_JOIN_FILTERS:
@@ -786,6 +794,25 @@ static int raw_getsockopt(struct socket *sock, int level, int optname,
 	return 0;
 }
 
+static bool raw_bad_txframe(struct raw_sock *ro, struct sk_buff *skb, int mtu)
+{
+	/* Classical CAN -> no checks for flags and device capabilities */
+	if (can_is_can_skb(skb))
+		return false;
+
+	/* CAN FD -> needs to be enabled and a CAN FD or CAN XL device */
+	if (ro->fd_frames && can_is_canfd_skb(skb) &&
+	    (mtu == CANFD_MTU || can_is_canxl_dev_mtu(mtu)))
+		return false;
+
+	/* CAN XL -> needs to be enabled and a CAN XL device */
+	if (ro->xl_frames && can_is_canxl_skb(skb) &&
+	    can_is_canxl_dev_mtu(mtu))
+		return false;
+
+	return true;
+}
+
 static int raw_sendmsg(struct socket *sock, struct msghdr *msg, size_t size)
 {
 	struct sock *sk = sock->sk;
@@ -833,20 +860,8 @@ static int raw_sendmsg(struct socket *sock, struct msghdr *msg, size_t size)
 		goto free_skb;
 
 	err = -EINVAL;
-	if (ro->xl_frames && can_is_canxl_dev_mtu(dev->mtu)) {
-		/* CAN XL, CAN FD and Classical CAN */
-		if (!can_is_canxl_skb(skb) && !can_is_canfd_skb(skb) &&
-		    !can_is_can_skb(skb))
-			goto free_skb;
-	} else if (ro->fd_frames && dev->mtu == CANFD_MTU) {
-		/* CAN FD and Classical CAN */
-		if (!can_is_canfd_skb(skb) && !can_is_can_skb(skb))
-			goto free_skb;
-	} else {
-		/* Classical CAN */
-		if (!can_is_can_skb(skb))
-			goto free_skb;
-	}
+	if (raw_bad_txframe(ro, skb, dev->mtu))
+		goto free_skb;
 
 	sockcm_init(&sockc, sk);
 	if (msg->msg_controllen) {
diff --git a/net/core/gro.c b/net/core/gro.c
index 506f83d715f8..4bac7ea6e025 100644
--- a/net/core/gro.c
+++ b/net/core/gro.c
@@ -162,6 +162,15 @@ int skb_gro_receive(struct sk_buff *p, struct sk_buff *skb)
 	struct sk_buff *lp;
 	int segs;
 
+	/* Do not splice page pool based packets w/ non-page pool
+	 * packets. This can result in reference count issues as page
+	 * pool pages will not decrement the reference count and will
+	 * instead be immediately returned to the pool or have frag
+	 * count decremented.
+	 */
+	if (p->pp_recycle != skb->pp_recycle)
+		return -ETOOMANYREFS;
+
 	/* pairs with WRITE_ONCE() in netif_set_gro_max_size() */
 	gro_max_size = READ_ONCE(p->dev->gro_max_size);
 
diff --git a/net/core/skbuff.c b/net/core/skbuff.c
index 4a0eb5593275..a31ff4d83ecc 100644
--- a/net/core/skbuff.c
+++ b/net/core/skbuff.c
@@ -4100,7 +4100,7 @@ struct sk_buff *skb_segment_list(struct sk_buff *skb,
 
 	skb_shinfo(skb)->frag_list = NULL;
 
-	do {
+	while (list_skb) {
 		nskb = list_skb;
 		list_skb = list_skb->next;
 
@@ -4146,8 +4146,7 @@ struct sk_buff *skb_segment_list(struct sk_buff *skb,
 		if (skb_needs_linearize(nskb, features) &&
 		    __skb_linearize(nskb))
 			goto err_linearize;
-
-	} while (list_skb);
+	}
 
 	skb->truesize = skb->truesize - delta_truesize;
 	skb->data_len = skb->data_len - delta_len;
diff --git a/net/core/sock_map.c b/net/core/sock_map.c
index 22fa2c5bc6ec..a68a7290a3b2 100644
--- a/net/core/sock_map.c
+++ b/net/core/sock_map.c
@@ -1569,15 +1569,16 @@ void sock_map_unhash(struct sock *sk)
 	psock = sk_psock(sk);
 	if (unlikely(!psock)) {
 		rcu_read_unlock();
-		if (sk->sk_prot->unhash)
-			sk->sk_prot->unhash(sk);
-		return;
+		saved_unhash = READ_ONCE(sk->sk_prot)->unhash;
+	} else {
+		saved_unhash = psock->saved_unhash;
+		sock_map_remove_links(sk, psock);
+		rcu_read_unlock();
 	}
-
-	saved_unhash = psock->saved_unhash;
-	sock_map_remove_links(sk, psock);
-	rcu_read_unlock();
-	saved_unhash(sk);
+	if (WARN_ON_ONCE(saved_unhash == sock_map_unhash))
+		return;
+	if (saved_unhash)
+		saved_unhash(sk);
 }
 EXPORT_SYMBOL_GPL(sock_map_unhash);
 
@@ -1590,17 +1591,18 @@ void sock_map_destroy(struct sock *sk)
 	psock = sk_psock_get(sk);
 	if (unlikely(!psock)) {
 		rcu_read_unlock();
-		if (sk->sk_prot->destroy)
-			sk->sk_prot->destroy(sk);
-		return;
+		saved_destroy = READ_ONCE(sk->sk_prot)->destroy;
+	} else {
+		saved_destroy = psock->saved_destroy;
+		sock_map_remove_links(sk, psock);
+		rcu_read_unlock();
+		sk_psock_stop(psock);
+		sk_psock_put(sk, psock);
 	}
-
-	saved_destroy = psock->saved_destroy;
-	sock_map_remove_links(sk, psock);
-	rcu_read_unlock();
-	sk_psock_stop(psock);
-	sk_psock_put(sk, psock);
-	saved_destroy(sk);
+	if (WARN_ON_ONCE(saved_destroy == sock_map_destroy))
+		return;
+	if (saved_destroy)
+		saved_destroy(sk);
 }
 EXPORT_SYMBOL_GPL(sock_map_destroy);
 
@@ -1615,16 +1617,21 @@ void sock_map_close(struct sock *sk, long timeout)
 	if (unlikely(!psock)) {
 		rcu_read_unlock();
 		release_sock(sk);
-		return sk->sk_prot->close(sk, timeout);
+		saved_close = READ_ONCE(sk->sk_prot)->close;
+	} else {
+		saved_close = psock->saved_close;
+		sock_map_remove_links(sk, psock);
+		rcu_read_unlock();
+		sk_psock_stop(psock);
+		release_sock(sk);
+		cancel_work_sync(&psock->work);
+		sk_psock_put(sk, psock);
 	}
-
-	saved_close = psock->saved_close;
-	sock_map_remove_links(sk, psock);
-	rcu_read_unlock();
-	sk_psock_stop(psock);
-	release_sock(sk);
-	cancel_work_sync(&psock->work);
-	sk_psock_put(sk, psock);
+	/* Make sure we do not recurse. This is a bug.
+	 * Leak the socket instead of crashing on a stack overflow.
+	 */
+	if (WARN_ON_ONCE(saved_close == sock_map_close))
+		return;
 	saved_close(sk, timeout);
 }
 EXPORT_SYMBOL_GPL(sock_map_close);
diff --git a/net/ipv4/tcp_bpf.c b/net/ipv4/tcp_bpf.c
index 94aad3870c5f..cf26d65ca389 100644
--- a/net/ipv4/tcp_bpf.c
+++ b/net/ipv4/tcp_bpf.c
@@ -6,6 +6,7 @@
 #include <linux/bpf.h>
 #include <linux/init.h>
 #include <linux/wait.h>
+#include <linux/util_macros.h>
 
 #include <net/inet_common.h>
 #include <net/tls.h>
@@ -639,10 +640,9 @@ EXPORT_SYMBOL_GPL(tcp_bpf_update_proto);
  */
 void tcp_bpf_clone(const struct sock *sk, struct sock *newsk)
 {
-	int family = sk->sk_family == AF_INET6 ? TCP_BPF_IPV6 : TCP_BPF_IPV4;
 	struct proto *prot = newsk->sk_prot;
 
-	if (prot == &tcp_bpf_prots[family][TCP_BPF_BASE])
+	if (is_insidevar(prot, tcp_bpf_prots))
 		newsk->sk_prot = sk->sk_prot_creator;
 }
 #endif /* CONFIG_BPF_SYSCALL */
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/mac802154/rx.c b/net/mac802154/rx.c
index c2aae2a6d6a6..97bb4401dd3e 100644
--- a/net/mac802154/rx.c
+++ b/net/mac802154/rx.c
@@ -213,7 +213,6 @@ __ieee802154_rx_handle_packet(struct ieee802154_local *local,
 	ret = ieee802154_parse_frame_start(skb, &hdr);
 	if (ret) {
 		pr_debug("got invalid frame\n");
-		kfree_skb(skb);
 		return;
 	}
 
diff --git a/net/mctp/af_mctp.c b/net/mctp/af_mctp.c
index 45bbe3e54cc2..3150f3f0c872 100644
--- a/net/mctp/af_mctp.c
+++ b/net/mctp/af_mctp.c
@@ -587,6 +587,11 @@ static void mctp_sk_unhash(struct sock *sk)
 	del_timer_sync(&msk->key_expiry);
 }
 
+static void mctp_sk_destruct(struct sock *sk)
+{
+	skb_queue_purge(&sk->sk_receive_queue);
+}
+
 static struct proto mctp_proto = {
 	.name		= "MCTP",
 	.owner		= THIS_MODULE,
@@ -623,6 +628,7 @@ static int mctp_pf_create(struct net *net, struct socket *sock,
 		return -ENOMEM;
 
 	sock_init_data(sock, sk);
+	sk->sk_destruct = mctp_sk_destruct;
 
 	rc = 0;
 	if (sk->sk_prot->init)
diff --git a/net/netfilter/nf_conntrack_proto_sctp.c b/net/netfilter/nf_conntrack_proto_sctp.c
index 945dd40e7077..011d414038ea 100644
--- a/net/netfilter/nf_conntrack_proto_sctp.c
+++ b/net/netfilter/nf_conntrack_proto_sctp.c
@@ -142,10 +142,11 @@ static void sctp_print_conntrack(struct seq_file *s, struct nf_conn *ct)
 }
 #endif
 
+/* do_basic_checks ensures sch->length > 0, do not use before */
 #define for_each_sctp_chunk(skb, sch, _sch, offset, dataoff, count)	\
 for ((offset) = (dataoff) + sizeof(struct sctphdr), (count) = 0;	\
-	((sch) = skb_header_pointer((skb), (offset), sizeof(_sch), &(_sch))) &&	\
-	(sch)->length;	\
+	(offset) < (skb)->len &&					\
+	((sch) = skb_header_pointer((skb), (offset), sizeof(_sch), &(_sch)));	\
 	(offset) += (ntohs((sch)->length) + 3) & ~3, (count)++)
 
 /* Some validity checks to make sure the chunks are fine */
diff --git a/net/netrom/af_netrom.c b/net/netrom/af_netrom.c
index 6f7f4392cffb..5a4cb796150f 100644
--- a/net/netrom/af_netrom.c
+++ b/net/netrom/af_netrom.c
@@ -400,6 +400,11 @@ static int nr_listen(struct socket *sock, int backlog)
 	struct sock *sk = sock->sk;
 
 	lock_sock(sk);
+	if (sock->state != SS_UNCONNECTED) {
+		release_sock(sk);
+		return -EINVAL;
+	}
+
 	if (sk->sk_state != TCP_LISTEN) {
 		memset(&nr_sk(sk)->user_addr, 0, AX25_ADDR_LEN);
 		sk->sk_max_ack_backlog = backlog;
diff --git a/net/openvswitch/datapath.c b/net/openvswitch/datapath.c
index a71795355aec..fcee6012293b 100644
--- a/net/openvswitch/datapath.c
+++ b/net/openvswitch/datapath.c
@@ -1004,14 +1004,14 @@ static int ovs_flow_cmd_new(struct sk_buff *skb, struct genl_info *info)
 	key = kzalloc(sizeof(*key), GFP_KERNEL);
 	if (!key) {
 		error = -ENOMEM;
-		goto err_kfree_key;
+		goto err_kfree_flow;
 	}
 
 	ovs_match_init(&match, key, false, &mask);
 	error = ovs_nla_get_match(net, &match, a[OVS_FLOW_ATTR_KEY],
 				  a[OVS_FLOW_ATTR_MASK], log);
 	if (error)
-		goto err_kfree_flow;
+		goto err_kfree_key;
 
 	ovs_flow_mask_key(&new_flow->key, key, true, &mask);
 
@@ -1019,14 +1019,14 @@ static int ovs_flow_cmd_new(struct sk_buff *skb, struct genl_info *info)
 	error = ovs_nla_get_identifier(&new_flow->id, a[OVS_FLOW_ATTR_UFID],
 				       key, log);
 	if (error)
-		goto err_kfree_flow;
+		goto err_kfree_key;
 
 	/* Validate actions. */
 	error = ovs_nla_copy_actions(net, a[OVS_FLOW_ATTR_ACTIONS],
 				     &new_flow->key, &acts, log);
 	if (error) {
 		OVS_NLERR(log, "Flow actions may not be safe on all matching packets.");
-		goto err_kfree_flow;
+		goto err_kfree_key;
 	}
 
 	reply = ovs_flow_cmd_alloc_info(acts, &new_flow->id, info, false,
@@ -1126,10 +1126,10 @@ err_unlock_ovs:
 	kfree_skb(reply);
 err_kfree_acts:
 	ovs_nla_free_flow_actions(acts);
-err_kfree_flow:
-	ovs_flow_free(new_flow, false);
 err_kfree_key:
 	kfree(key);
+err_kfree_flow:
+	ovs_flow_free(new_flow, false);
 error:
 	return error;
 }
diff --git a/net/qrtr/ns.c b/net/qrtr/ns.c
index 1990d496fcfc..e595079c2caf 100644
--- a/net/qrtr/ns.c
+++ b/net/qrtr/ns.c
@@ -83,7 +83,10 @@ static struct qrtr_node *node_get(unsigned int node_id)
 
 	node->id = node_id;
 
-	radix_tree_insert(&nodes, node_id, node);
+	if (radix_tree_insert(&nodes, node_id, node)) {
+		kfree(node);
+		return NULL;
+	}
 
 	return node;
 }
diff --git a/net/rose/af_rose.c b/net/rose/af_rose.c
index 36fefc3957d7..ca2b17f32670 100644
--- a/net/rose/af_rose.c
+++ b/net/rose/af_rose.c
@@ -488,6 +488,12 @@ static int rose_listen(struct socket *sock, int backlog)
 {
 	struct sock *sk = sock->sk;
 
+	lock_sock(sk);
+	if (sock->state != SS_UNCONNECTED) {
+		release_sock(sk);
+		return -EINVAL;
+	}
+
 	if (sk->sk_state != TCP_LISTEN) {
 		struct rose_sock *rose = rose_sk(sk);
 
@@ -497,8 +503,10 @@ static int rose_listen(struct socket *sock, int backlog)
 		memset(rose->dest_digis, 0, AX25_ADDR_LEN * ROSE_MAX_DIGIS);
 		sk->sk_max_ack_backlog = backlog;
 		sk->sk_state           = TCP_LISTEN;
+		release_sock(sk);
 		return 0;
 	}
+	release_sock(sk);
 
 	return -EOPNOTSUPP;
 }
diff --git a/net/sched/sch_htb.c b/net/sched/sch_htb.c
index f46643850df8..cc28e41fb745 100644
--- a/net/sched/sch_htb.c
+++ b/net/sched/sch_htb.c
@@ -431,7 +431,10 @@ static void htb_activate_prios(struct htb_sched *q, struct htb_class *cl)
 	while (cl->cmode == HTB_MAY_BORROW && p && mask) {
 		m = mask;
 		while (m) {
-			int prio = ffz(~m);
+			unsigned int prio = ffz(~m);
+
+			if (WARN_ON_ONCE(prio > ARRAY_SIZE(p->inner.clprio)))
+				break;
 			m &= ~(1 << prio);
 
 			if (p->inner.clprio[prio].feed.rb_node)
diff --git a/net/sctp/transport.c b/net/sctp/transport.c
index ca1eba95c293..2f66a2006517 100644
--- a/net/sctp/transport.c
+++ b/net/sctp/transport.c
@@ -196,9 +196,7 @@ void sctp_transport_reset_hb_timer(struct sctp_transport *transport)
 
 	/* When a data chunk is sent, reset the heartbeat interval.  */
 	expires = jiffies + sctp_transport_timeout(transport);
-	if ((time_before(transport->hb_timer.expires, expires) ||
-	     !timer_pending(&transport->hb_timer)) &&
-	    !mod_timer(&transport->hb_timer,
+	if (!mod_timer(&transport->hb_timer,
 		       expires + get_random_u32_below(transport->rto)))
 		sctp_transport_hold(transport);
 }
diff --git a/net/tls/tls_sw.c b/net/tls/tls_sw.c
index 9ed978634125..a83d2b4275fa 100644
--- a/net/tls/tls_sw.c
+++ b/net/tls/tls_sw.c
@@ -2427,7 +2427,7 @@ static bool tls_is_tx_ready(struct tls_sw_context_tx *ctx)
 {
 	struct tls_rec *rec;
 
-	rec = list_first_entry(&ctx->tx_list, struct tls_rec, list);
+	rec = list_first_entry_or_null(&ctx->tx_list, struct tls_rec, list);
 	if (!rec)
 		return false;