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

Pull networking fixes from David Miller:

 1) Fix handling of pinned BPF map nodes in hash of maps, from Daniel
    Borkmann.

 2) IPSEC ESP error paths leak memory, from Steffen Klassert.

 3) We need an RCU grace period before freeing fib6_node objects, from
    Wei Wang.

 4) Must check skb_put_padto() return value in HSR driver, from FLorian
    Fainelli.

 5) Fix oops on PHY probe failure in ftgmac100 driver, from Andrew
    Jeffery.

 6) Fix infinite loop in UDP queue when using SO_PEEK_OFF, from Eric
    Dumazet.

 7) Use after free when tcf_chain_destroy() called multiple times, from
    Jiri Pirko.

 8) Fix KSZ DSA tag layer multiple free of SKBS, from Florian Fainelli.

 9) Fix leak of uninitialized memory in sctp_get_sctp_info(),
    inet_diag_msg_sctpladdrs_fill() and inet_diag_msg_sctpaddrs_fill().
    From Stefano Brivio.

10) L2TP tunnel refcount fixes from Guillaume Nault.

11) Don't leak UDP secpath in udp_set_dev_scratch(), from Yossi
    Kauperman.

12) Revert a PHY layer change wrt. handling of PHY_HALTED state in
    phy_stop_machine(), it causes regressions for multiple people. From
    Florian Fainelli.

13) When packets are sent out of br0 we have to clear the
    offload_fwdq_mark value.

14) Several NULL pointer deref fixes in packet schedulers when their
    ->init() routine fails. From Nikolay Aleksandrov.

15) Aquantium devices cannot checksum offload correctly when the packet
    is <= 60 bytes. From Pavel Belous.

16) Fix vnet header access past end of buffer in AF_PACKET, from
    Benjamin Poirier.

17) Double free in probe error paths of nfp driver, from Dan Carpenter.

18) QOS capability not checked properly in DCB init paths of mlx5
    driver, from Huy Nguyen.

19) Fix conflicts between firmware load failure and health_care timer in
    mlx5, also from Huy Nguyen.

20) Fix dangling page pointer when DMA mapping errors occur in mlx5,
    from Eran Ben ELisha.

21) ->ndo_setup_tc() in bnxt_en driver doesn't count rings properly,
    from Michael Chan.

22) Missing MSIX vector free in bnxt_en, also from Michael Chan.

23) Refcount leak in xfrm layer when using sk_policy, from Lorenzo
    Colitti.

24) Fix copy of uninitialized data in qlge driver, from Arnd Bergmann.

25) bpf_setsockopts() erroneously always returns -EINVAL even on
    success. Fix from Yuchung Cheng.

26) tipc_rcv() needs to linearize the SKB before parsing the inner
    headers, from Parthasarathy Bhuvaragan.

27) Fix deadlock between link status updates and link removal in netvsc
    driver, from Stephen Hemminger.

28) Missed locking of page fragment handling in ESP output, from Steffen
    Klassert.

29) Fix refcnt leak in ebpf congestion control code, from Sabrina
    Dubroca.

30) sxgbe_probe_config_dt() doesn't check devm_kzalloc()'s return value,
    from Christophe Jaillet.

31) Fix missing ipv6 rx_dst_cookie update when rx_dst is updated during
    early demux, from Paolo Abeni.

32) Several info leaks in xfrm_user layer, from Mathias Krause.

33) Fix out of bounds read in cxgb4 driver, from Stefano Brivio.

34) Properly propagate obsolete state of route upwards in ipv6 so that
    upper holders like xfrm can see it. From Xin Long.

* git://git.kernel.org/pub/scm/linux/kernel/git/davem/net: (118 commits)
  udp: fix secpath leak
  bridge: switchdev: Clear forward mark when transmitting packet
  mlxsw: spectrum: Forbid linking to devices that have uppers
  wl1251: add a missing spin_lock_init()
  Revert "net: phy: Correctly process PHY_HALTED in phy_stop_machine()"
  net: dsa: bcm_sf2: Fix number of CFP entries for BCM7278
  kcm: do not attach PF_KCM sockets to avoid deadlock
  sch_tbf: fix two null pointer dereferences on init failure
  sch_sfq: fix null pointer dereference on init failure
  sch_netem: avoid null pointer deref on init failure
  sch_fq_codel: avoid double free on init failure
  sch_cbq: fix null pointer dereferences on init failure
  sch_hfsc: fix null pointer deref and double free on init failure
  sch_hhf: fix null pointer dereference on init failure
  sch_multiq: fix double free on init failure
  sch_htb: fix crash on init failure
  net/mlx5e: Fix CQ moderation mode not set properly
  net/mlx5e: Fix inline header size for small packets
  net/mlx5: E-Switch, Unload the representors in the correct order
  net/mlx5e: Properly resolve TC offloaded ipv6 vxlan tunnel source address
  ...

7 files changed, 79 insertions, 13 deletions

diff --git a/include/linux/mlx5/driver.h b/include/linux/mlx5/driver.h
index df6ce59a1f95..205d82d4c468 100644
--- a/include/linux/mlx5/driver.h
+++ b/include/linux/mlx5/driver.h
@@ -673,9 +673,7 @@ enum mlx5_device_state {
 };
 
 enum mlx5_interface_state {
-	MLX5_INTERFACE_STATE_DOWN = BIT(0),
-	MLX5_INTERFACE_STATE_UP = BIT(1),
-	MLX5_INTERFACE_STATE_SHUTDOWN = BIT(2),
+	MLX5_INTERFACE_STATE_UP = BIT(0),
 };
 
 enum mlx5_pci_status {
diff --git a/include/linux/netdevice.h b/include/linux/netdevice.h
index 779b23595596..c99ba7914c0a 100644
--- a/include/linux/netdevice.h
+++ b/include/linux/netdevice.h
@@ -3866,6 +3866,8 @@ int netdev_walk_all_upper_dev_rcu(struct net_device *dev,
 bool netdev_has_upper_dev_all_rcu(struct net_device *dev,
 				  struct net_device *upper_dev);
 
+bool netdev_has_any_upper_dev(struct net_device *dev);
+
 void *netdev_lower_get_next_private(struct net_device *dev,
 				    struct list_head **iter);
 void *netdev_lower_get_next_private_rcu(struct net_device *dev,
diff --git a/include/linux/skbuff.h b/include/linux/skbuff.h
index dbe29b6c9bd6..d67a8182e5eb 100644
--- a/include/linux/skbuff.h
+++ b/include/linux/skbuff.h
@@ -973,7 +973,23 @@ int __must_check skb_to_sgvec_nomark(struct sk_buff *skb, struct scatterlist *sg
 int __must_check skb_to_sgvec(struct sk_buff *skb, struct scatterlist *sg,
 			      int offset, int len);
 int skb_cow_data(struct sk_buff *skb, int tailbits, struct sk_buff **trailer);
-int skb_pad(struct sk_buff *skb, int pad);
+int __skb_pad(struct sk_buff *skb, int pad, bool free_on_error);
+
+/**
+ *	skb_pad			-	zero pad the tail of an skb
+ *	@skb: buffer to pad
+ *	@pad: space to pad
+ *
+ *	Ensure that a buffer is followed by a padding area that is zero
+ *	filled. Used by network drivers which may DMA or transfer data
+ *	beyond the buffer end onto the wire.
+ *
+ *	May return error in out of memory cases. The skb is freed on error.
+ */
+static inline int skb_pad(struct sk_buff *skb, int pad)
+{
+	return __skb_pad(skb, pad, true);
+}
 #define dev_kfree_skb(a)	consume_skb(a)
 
 int skb_append_datato_frags(struct sock *sk, struct sk_buff *skb,
@@ -2825,25 +2841,42 @@ static inline int skb_padto(struct sk_buff *skb, unsigned int len)
  *	skb_put_padto - increase size and pad an skbuff up to a minimal size
  *	@skb: buffer to pad
  *	@len: minimal length
+ *	@free_on_error: free buffer on error
  *
  *	Pads up a buffer to ensure the trailing bytes exist and are
  *	blanked. If the buffer already contains sufficient data it
  *	is untouched. Otherwise it is extended. Returns zero on
- *	success. The skb is freed on error.
+ *	success. The skb is freed on error if @free_on_error is true.
  */
-static inline int skb_put_padto(struct sk_buff *skb, unsigned int len)
+static inline int __skb_put_padto(struct sk_buff *skb, unsigned int len,
+				  bool free_on_error)
 {
 	unsigned int size = skb->len;
 
 	if (unlikely(size < len)) {
 		len -= size;
-		if (skb_pad(skb, len))
+		if (__skb_pad(skb, len, free_on_error))
 			return -ENOMEM;
 		__skb_put(skb, len);
 	}
 	return 0;
 }
 
+/**
+ *	skb_put_padto - increase size and pad an skbuff up to a minimal size
+ *	@skb: buffer to pad
+ *	@len: minimal length
+ *
+ *	Pads up a buffer to ensure the trailing bytes exist and are
+ *	blanked. If the buffer already contains sufficient data it
+ *	is untouched. Otherwise it is extended. Returns zero on
+ *	success. The skb is freed on error.
+ */
+static inline int skb_put_padto(struct sk_buff *skb, unsigned int len)
+{
+	return __skb_put_padto(skb, len, true);
+}
+
 static inline int skb_add_data(struct sk_buff *skb,
 			       struct iov_iter *from, int copy)
 {
diff --git a/include/net/ip6_fib.h b/include/net/ip6_fib.h
index 1a88008cc6f5..af509f801084 100644
--- a/include/net/ip6_fib.h
+++ b/include/net/ip6_fib.h
@@ -70,6 +70,7 @@ struct fib6_node {
 	__u16			fn_flags;
 	int			fn_sernum;
 	struct rt6_info		*rr_ptr;
+	struct rcu_head		rcu;
 };
 
 #ifndef CONFIG_IPV6_SUBTREES
@@ -104,7 +105,7 @@ struct rt6_info {
 	 * the same cache line.
 	 */
 	struct fib6_table		*rt6i_table;
-	struct fib6_node		*rt6i_node;
+	struct fib6_node __rcu		*rt6i_node;
 
 	struct in6_addr			rt6i_gateway;
 
@@ -167,13 +168,40 @@ static inline void rt6_update_expires(struct rt6_info *rt0, int timeout)
 	rt0->rt6i_flags |= RTF_EXPIRES;
 }
 
+/* Function to safely get fn->sernum for passed in rt
+ * and store result in passed in cookie.
+ * Return true if we can get cookie safely
+ * Return false if not
+ */
+static inline bool rt6_get_cookie_safe(const struct rt6_info *rt,
+				       u32 *cookie)
+{
+	struct fib6_node *fn;
+	bool status = false;
+
+	rcu_read_lock();
+	fn = rcu_dereference(rt->rt6i_node);
+
+	if (fn) {
+		*cookie = fn->fn_sernum;
+		status = true;
+	}
+
+	rcu_read_unlock();
+	return status;
+}
+
 static inline u32 rt6_get_cookie(const struct rt6_info *rt)
 {
+	u32 cookie = 0;
+
 	if (rt->rt6i_flags & RTF_PCPU ||
 	    (unlikely(!list_empty(&rt->rt6i_uncached)) && rt->dst.from))
 		rt = (struct rt6_info *)(rt->dst.from);
 
-	return rt->rt6i_node ? rt->rt6i_node->fn_sernum : 0;
+	rt6_get_cookie_safe(rt, &cookie);
+
+	return cookie;
 }
 
 static inline void ip6_rt_put(struct rt6_info *rt)
diff --git a/include/net/sch_generic.h b/include/net/sch_generic.h
index 67f815e5d525..c1109cdbbfa6 100644
--- a/include/net/sch_generic.h
+++ b/include/net/sch_generic.h
@@ -101,6 +101,13 @@ struct Qdisc {
 	spinlock_t		busylock ____cacheline_aligned_in_smp;
 };
 
+static inline void qdisc_refcount_inc(struct Qdisc *qdisc)
+{
+	if (qdisc->flags & TCQ_F_BUILTIN)
+		return;
+	refcount_inc(&qdisc->refcnt);
+}
+
 static inline bool qdisc_is_running(const struct Qdisc *qdisc)
 {
 	return (raw_read_seqcount(&qdisc->running) & 1) ? true : false;
diff --git a/include/net/tcp.h b/include/net/tcp.h
index ada65e767b28..f642a39f9eee 100644
--- a/include/net/tcp.h
+++ b/include/net/tcp.h
@@ -1004,9 +1004,7 @@ void tcp_get_default_congestion_control(char *name);
 void tcp_get_available_congestion_control(char *buf, size_t len);
 void tcp_get_allowed_congestion_control(char *buf, size_t len);
 int tcp_set_allowed_congestion_control(char *allowed);
-int tcp_set_congestion_control(struct sock *sk, const char *name, bool load);
-void tcp_reinit_congestion_control(struct sock *sk,
-				   const struct tcp_congestion_ops *ca);
+int tcp_set_congestion_control(struct sock *sk, const char *name, bool load, bool reinit);
 u32 tcp_slow_start(struct tcp_sock *tp, u32 acked);
 void tcp_cong_avoid_ai(struct tcp_sock *tp, u32 w, u32 acked);
 
diff --git a/include/net/udp.h b/include/net/udp.h
index 586de4b811b5..626c2d8a70c5 100644
--- a/include/net/udp.h
+++ b/include/net/udp.h
@@ -260,7 +260,7 @@ static inline struct sk_buff *skb_recv_udp(struct sock *sk, unsigned int flags,
 }
 
 void udp_v4_early_demux(struct sk_buff *skb);
-void udp_sk_rx_dst_set(struct sock *sk, struct dst_entry *dst);
+bool udp_sk_rx_dst_set(struct sock *sk, struct dst_entry *dst);
 int udp_get_port(struct sock *sk, unsigned short snum,
 		 int (*saddr_cmp)(const struct sock *,
 				  const struct sock *));