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

Pull networking fixes from David Miller:

 1) Fix crash on bpf_prog_load() errors, from Daniel Borkmann.

 2) Fix ATM VCC memory accounting, from David Woodhouse.

 3) fib6_info objects need RCU freeing, from Eric Dumazet.

 4) Fix SO_BINDTODEVICE handling for TCP sockets, from David Ahern.

 5) Fix clobbered error code in enic_open() failure path, from
    Govindarajulu Varadarajan.

 6) Propagate dev_get_valid_name() error returns properly, from Li
    RongQing.

 7) Fix suspend/resume in davinci_emac driver, from Bartosz Golaszewski.

 8) Various act_ife fixes (recursive locking, IDR leaks, etc.) from
    Davide Caratti.

 9) Fix buggy checksum handling in sungem driver, from Eric Dumazet.

* git://git.kernel.org/pub/scm/linux/kernel/git/davem/net: (40 commits)
  ip: limit use of gso_size to udp
  stmmac: fix DMA channel hang in half-duplex mode
  net: stmmac: socfpga: add additional ocp reset line for Stratix10
  net: sungem: fix rx checksum support
  bpfilter: ignore binary files
  bpfilter: fix build error
  net/usb/drivers: Remove useless hrtimer_active check
  net/sched: act_ife: preserve the action control in case of error
  net/sched: act_ife: fix recursive lock and idr leak
  net: ethernet: fix suspend/resume in davinci_emac
  net: propagate dev_get_valid_name return code
  enic: do not overwrite error code
  net/tcp: Fix socket lookups with SO_BINDTODEVICE
  ptp: replace getnstimeofday64() with ktime_get_real_ts64()
  net/ipv6: respect rcu grace period before freeing fib6_info
  net: net_failover: fix typo in net_failover_slave_register()
  ipvlan: use ETH_MAX_MTU as max mtu
  net: hamradio: use eth_broadcast_addr
  enic: initialize enic->rfs_h.lock in enic_probe
  MAINTAINERS: Add Sam as the maintainer for NCSI
  ...

4 files changed, 87 insertions, 24 deletions

diff --git a/include/linux/atmdev.h b/include/linux/atmdev.h
index 0c27515d2cf6..8124815eb121 100644
--- a/include/linux/atmdev.h
+++ b/include/linux/atmdev.h
@@ -214,6 +214,7 @@ struct atmphy_ops {
 struct atm_skb_data {
 	struct atm_vcc	*vcc;		/* ATM VCC */
 	unsigned long	atm_options;	/* ATM layer options */
+	unsigned int	acct_truesize;  /* truesize accounted to vcc */
 };
 
 #define VCC_HTABLE_SIZE 32
@@ -241,6 +242,20 @@ void vcc_insert_socket(struct sock *sk);
 
 void atm_dev_release_vccs(struct atm_dev *dev);
 
+static inline void atm_account_tx(struct atm_vcc *vcc, struct sk_buff *skb)
+{
+	/*
+	 * Because ATM skbs may not belong to a sock (and we don't
+	 * necessarily want to), skb->truesize may be adjusted,
+	 * escaping the hack in pskb_expand_head() which avoids
+	 * doing so for some cases. So stash the value of truesize
+	 * at the time we accounted it, and atm_pop_raw() can use
+	 * that value later, in case it changes.
+	 */
+	refcount_add(skb->truesize, &sk_atm(vcc)->sk_wmem_alloc);
+	ATM_SKB(skb)->acct_truesize = skb->truesize;
+	ATM_SKB(skb)->atm_options = vcc->atm_options;
+}
 
 static inline void atm_force_charge(struct atm_vcc *vcc,int truesize)
 {
diff --git a/include/linux/bpf.h b/include/linux/bpf.h
index 995c3b1e59bf..7df32a3200f7 100644
--- a/include/linux/bpf.h
+++ b/include/linux/bpf.h
@@ -488,12 +488,15 @@ void bpf_patch_call_args(struct bpf_insn *insn, u32 stack_depth);
 
 /* Map specifics */
 struct xdp_buff;
+struct sk_buff;
 
 struct bpf_dtab_netdev *__dev_map_lookup_elem(struct bpf_map *map, u32 key);
 void __dev_map_insert_ctx(struct bpf_map *map, u32 index);
 void __dev_map_flush(struct bpf_map *map);
 int dev_map_enqueue(struct bpf_dtab_netdev *dst, struct xdp_buff *xdp,
 		    struct net_device *dev_rx);
+int dev_map_generic_redirect(struct bpf_dtab_netdev *dst, struct sk_buff *skb,
+			     struct bpf_prog *xdp_prog);
 
 struct bpf_cpu_map_entry *__cpu_map_lookup_elem(struct bpf_map *map, u32 key);
 void __cpu_map_insert_ctx(struct bpf_map *map, u32 index);
@@ -586,6 +589,15 @@ int dev_map_enqueue(struct bpf_dtab_netdev *dst, struct xdp_buff *xdp,
 	return 0;
 }
 
+struct sk_buff;
+
+static inline int dev_map_generic_redirect(struct bpf_dtab_netdev *dst,
+					   struct sk_buff *skb,
+					   struct bpf_prog *xdp_prog)
+{
+	return 0;
+}
+
 static inline
 struct bpf_cpu_map_entry *__cpu_map_lookup_elem(struct bpf_map *map, u32 key)
 {
diff --git a/include/linux/filter.h b/include/linux/filter.h
index 45fc0f5000d8..b615df57b7d5 100644
--- a/include/linux/filter.h
+++ b/include/linux/filter.h
@@ -19,6 +19,7 @@
 #include <linux/cryptohash.h>
 #include <linux/set_memory.h>
 #include <linux/kallsyms.h>
+#include <linux/if_vlan.h>
 
 #include <net/sch_generic.h>
 
@@ -469,7 +470,8 @@ struct sock_fprog_kern {
 };
 
 struct bpf_binary_header {
-	unsigned int pages;
+	u16 pages;
+	u16 locked:1;
 	u8 image[];
 };
 
@@ -671,15 +673,18 @@ bpf_ctx_narrow_access_ok(u32 off, u32 size, u32 size_default)
 
 #define bpf_classic_proglen(fprog) (fprog->len * sizeof(fprog->filter[0]))
 
-#ifdef CONFIG_ARCH_HAS_SET_MEMORY
 static inline void bpf_prog_lock_ro(struct bpf_prog *fp)
 {
+#ifdef CONFIG_ARCH_HAS_SET_MEMORY
 	fp->locked = 1;
-	WARN_ON_ONCE(set_memory_ro((unsigned long)fp, fp->pages));
+	if (set_memory_ro((unsigned long)fp, fp->pages))
+		fp->locked = 0;
+#endif
 }
 
 static inline void bpf_prog_unlock_ro(struct bpf_prog *fp)
 {
+#ifdef CONFIG_ARCH_HAS_SET_MEMORY
 	if (fp->locked) {
 		WARN_ON_ONCE(set_memory_rw((unsigned long)fp, fp->pages));
 		/* In case set_memory_rw() fails, we want to be the first
@@ -687,34 +692,30 @@ static inline void bpf_prog_unlock_ro(struct bpf_prog *fp)
 		 */
 		fp->locked = 0;
 	}
+#endif
 }
 
 static inline void bpf_jit_binary_lock_ro(struct bpf_binary_header *hdr)
 {
-	WARN_ON_ONCE(set_memory_ro((unsigned long)hdr, hdr->pages));
-}
-
-static inline void bpf_jit_binary_unlock_ro(struct bpf_binary_header *hdr)
-{
-	WARN_ON_ONCE(set_memory_rw((unsigned long)hdr, hdr->pages));
-}
-#else
-static inline void bpf_prog_lock_ro(struct bpf_prog *fp)
-{
-}
-
-static inline void bpf_prog_unlock_ro(struct bpf_prog *fp)
-{
-}
-
-static inline void bpf_jit_binary_lock_ro(struct bpf_binary_header *hdr)
-{
+#ifdef CONFIG_ARCH_HAS_SET_MEMORY
+	hdr->locked = 1;
+	if (set_memory_ro((unsigned long)hdr, hdr->pages))
+		hdr->locked = 0;
+#endif
 }
 
 static inline void bpf_jit_binary_unlock_ro(struct bpf_binary_header *hdr)
 {
+#ifdef CONFIG_ARCH_HAS_SET_MEMORY
+	if (hdr->locked) {
+		WARN_ON_ONCE(set_memory_rw((unsigned long)hdr, hdr->pages));
+		/* In case set_memory_rw() fails, we want to be the first
+		 * to crash here instead of some random place later on.
+		 */
+		hdr->locked = 0;
+	}
+#endif
 }
-#endif /* CONFIG_ARCH_HAS_SET_MEMORY */
 
 static inline struct bpf_binary_header *
 bpf_jit_binary_hdr(const struct bpf_prog *fp)
@@ -725,6 +726,22 @@ bpf_jit_binary_hdr(const struct bpf_prog *fp)
 	return (void *)addr;
 }
 
+#ifdef CONFIG_ARCH_HAS_SET_MEMORY
+static inline int bpf_prog_check_pages_ro_single(const struct bpf_prog *fp)
+{
+	if (!fp->locked)
+		return -ENOLCK;
+	if (fp->jited) {
+		const struct bpf_binary_header *hdr = bpf_jit_binary_hdr(fp);
+
+		if (!hdr->locked)
+			return -ENOLCK;
+	}
+
+	return 0;
+}
+#endif
+
 int sk_filter_trim_cap(struct sock *sk, struct sk_buff *skb, unsigned int cap);
 static inline int sk_filter(struct sock *sk, struct sk_buff *skb)
 {
@@ -786,6 +803,21 @@ static inline bool bpf_dump_raw_ok(void)
 struct bpf_prog *bpf_patch_insn_single(struct bpf_prog *prog, u32 off,
 				       const struct bpf_insn *patch, u32 len);
 
+static inline int __xdp_generic_ok_fwd_dev(struct sk_buff *skb,
+					   struct net_device *fwd)
+{
+	unsigned int len;
+
+	if (unlikely(!(fwd->flags & IFF_UP)))
+		return -ENETDOWN;
+
+	len = fwd->mtu + fwd->hard_header_len + VLAN_HLEN;
+	if (skb->len > len)
+		return -EMSGSIZE;
+
+	return 0;
+}
+
 /* The pair of xdp_do_redirect and xdp_do_flush_map MUST be called in the
  * same cpu context. Further for best results no more than a single map
  * for the do_redirect/do_flush pair should be used. This limitation is
@@ -961,6 +993,9 @@ static inline void bpf_prog_kallsyms_del(struct bpf_prog *fp)
 }
 #endif /* CONFIG_BPF_JIT */
 
+void bpf_prog_kallsyms_del_subprogs(struct bpf_prog *fp);
+void bpf_prog_kallsyms_del_all(struct bpf_prog *fp);
+
 #define BPF_ANC		BIT(15)
 
 static inline bool bpf_needs_clear_a(const struct sock_filter *first)
diff --git a/include/net/ip6_fib.h b/include/net/ip6_fib.h
index 5cba71d2dc44..71b9043aa0e7 100644
--- a/include/net/ip6_fib.h
+++ b/include/net/ip6_fib.h
@@ -170,6 +170,7 @@ struct fib6_info {
 					unused:3;
 
 	struct fib6_nh			fib6_nh;
+	struct rcu_head			rcu;
 };
 
 struct rt6_info {
@@ -273,7 +274,7 @@ static inline void ip6_rt_put(struct rt6_info *rt)
 }
 
 struct fib6_info *fib6_info_alloc(gfp_t gfp_flags);
-void fib6_info_destroy(struct fib6_info *f6i);
+void fib6_info_destroy_rcu(struct rcu_head *head);
 
 static inline void fib6_info_hold(struct fib6_info *f6i)
 {
@@ -283,7 +284,7 @@ static inline void fib6_info_hold(struct fib6_info *f6i)
 static inline void fib6_info_release(struct fib6_info *f6i)
 {
 	if (f6i && atomic_dec_and_test(&f6i->fib6_ref))
-		fib6_info_destroy(f6i);
+		call_rcu(&f6i->rcu, fib6_info_destroy_rcu);
 }
 
 enum fib6_walk_state {