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-rw-r--r--net/ipv4/fib_frontend.c5
-rw-r--r--net/ipv4/inet_connection_sock.c30
-rw-r--r--net/ipv4/ip_gre.c5
-rw-r--r--net/ipv4/netfilter/arp_tables.c8
-rw-r--r--net/ipv4/netfilter/ip_tables.c8
-rw-r--r--net/ipv4/route.c4
-rw-r--r--net/ipv4/udp.c7
-rw-r--r--net/ipv4/udp_offload.c23
8 files changed, 67 insertions, 23 deletions
diff --git a/net/ipv4/fib_frontend.c b/net/ipv4/fib_frontend.c
index 48741352a88a..c484b1c0fc00 100644
--- a/net/ipv4/fib_frontend.c
+++ b/net/ipv4/fib_frontend.c
@@ -1050,6 +1050,11 @@ next:
e++;
}
}
+
+ /* Don't let NLM_DONE coalesce into a message, even if it could.
+ * Some user space expects NLM_DONE in a separate recv().
+ */
+ err = skb->len;
out:
cb->args[1] = e;
diff --git a/net/ipv4/inet_connection_sock.c b/net/ipv4/inet_connection_sock.c
index c038e28e2f1e..3b38610958ee 100644
--- a/net/ipv4/inet_connection_sock.c
+++ b/net/ipv4/inet_connection_sock.c
@@ -203,8 +203,15 @@ static bool __inet_bhash2_conflict(const struct sock *sk, struct sock *sk2,
kuid_t sk_uid, bool relax,
bool reuseport_cb_ok, bool reuseport_ok)
{
- if (sk->sk_family == AF_INET && ipv6_only_sock(sk2))
- return false;
+ if (ipv6_only_sock(sk2)) {
+ if (sk->sk_family == AF_INET)
+ return false;
+
+#if IS_ENABLED(CONFIG_IPV6)
+ if (ipv6_addr_v4mapped(&sk->sk_v6_rcv_saddr))
+ return false;
+#endif
+ }
return inet_bind_conflict(sk, sk2, sk_uid, relax,
reuseport_cb_ok, reuseport_ok);
@@ -287,6 +294,7 @@ static bool inet_bhash2_addr_any_conflict(const struct sock *sk, int port, int l
struct sock_reuseport *reuseport_cb;
struct inet_bind_hashbucket *head2;
struct inet_bind2_bucket *tb2;
+ bool conflict = false;
bool reuseport_cb_ok;
rcu_read_lock();
@@ -299,18 +307,20 @@ static bool inet_bhash2_addr_any_conflict(const struct sock *sk, int port, int l
spin_lock(&head2->lock);
- inet_bind_bucket_for_each(tb2, &head2->chain)
- if (inet_bind2_bucket_match_addr_any(tb2, net, port, l3mdev, sk))
- break;
+ inet_bind_bucket_for_each(tb2, &head2->chain) {
+ if (!inet_bind2_bucket_match_addr_any(tb2, net, port, l3mdev, sk))
+ continue;
- if (tb2 && inet_bhash2_conflict(sk, tb2, uid, relax, reuseport_cb_ok,
- reuseport_ok)) {
- spin_unlock(&head2->lock);
- return true;
+ if (!inet_bhash2_conflict(sk, tb2, uid, relax, reuseport_cb_ok, reuseport_ok))
+ continue;
+
+ conflict = true;
+ break;
}
spin_unlock(&head2->lock);
- return false;
+
+ return conflict;
}
/*
diff --git a/net/ipv4/ip_gre.c b/net/ipv4/ip_gre.c
index 7b16c211b904..57ddcd8c62f6 100644
--- a/net/ipv4/ip_gre.c
+++ b/net/ipv4/ip_gre.c
@@ -280,8 +280,13 @@ static int erspan_rcv(struct sk_buff *skb, struct tnl_ptk_info *tpi,
tpi->flags | TUNNEL_NO_KEY,
iph->saddr, iph->daddr, 0);
} else {
+ if (unlikely(!pskb_may_pull(skb,
+ gre_hdr_len + sizeof(*ershdr))))
+ return PACKET_REJECT;
+
ershdr = (struct erspan_base_hdr *)(skb->data + gre_hdr_len);
ver = ershdr->ver;
+ iph = ip_hdr(skb);
tunnel = ip_tunnel_lookup(itn, skb->dev->ifindex,
tpi->flags | TUNNEL_KEY,
iph->saddr, iph->daddr, tpi->key);
diff --git a/net/ipv4/netfilter/arp_tables.c b/net/ipv4/netfilter/arp_tables.c
index 2407066b0fec..14365b20f1c5 100644
--- a/net/ipv4/netfilter/arp_tables.c
+++ b/net/ipv4/netfilter/arp_tables.c
@@ -956,6 +956,8 @@ static int do_replace(struct net *net, sockptr_t arg, unsigned int len)
void *loc_cpu_entry;
struct arpt_entry *iter;
+ if (len < sizeof(tmp))
+ return -EINVAL;
if (copy_from_sockptr(&tmp, arg, sizeof(tmp)) != 0)
return -EFAULT;
@@ -964,6 +966,8 @@ static int do_replace(struct net *net, sockptr_t arg, unsigned int len)
return -ENOMEM;
if (tmp.num_counters == 0)
return -EINVAL;
+ if ((u64)len < (u64)tmp.size + sizeof(tmp))
+ return -EINVAL;
tmp.name[sizeof(tmp.name)-1] = 0;
@@ -1254,6 +1258,8 @@ static int compat_do_replace(struct net *net, sockptr_t arg, unsigned int len)
void *loc_cpu_entry;
struct arpt_entry *iter;
+ if (len < sizeof(tmp))
+ return -EINVAL;
if (copy_from_sockptr(&tmp, arg, sizeof(tmp)) != 0)
return -EFAULT;
@@ -1262,6 +1268,8 @@ static int compat_do_replace(struct net *net, sockptr_t arg, unsigned int len)
return -ENOMEM;
if (tmp.num_counters == 0)
return -EINVAL;
+ if ((u64)len < (u64)tmp.size + sizeof(tmp))
+ return -EINVAL;
tmp.name[sizeof(tmp.name)-1] = 0;
diff --git a/net/ipv4/netfilter/ip_tables.c b/net/ipv4/netfilter/ip_tables.c
index 7da1df4997d0..fe89a056eb06 100644
--- a/net/ipv4/netfilter/ip_tables.c
+++ b/net/ipv4/netfilter/ip_tables.c
@@ -1108,6 +1108,8 @@ do_replace(struct net *net, sockptr_t arg, unsigned int len)
void *loc_cpu_entry;
struct ipt_entry *iter;
+ if (len < sizeof(tmp))
+ return -EINVAL;
if (copy_from_sockptr(&tmp, arg, sizeof(tmp)) != 0)
return -EFAULT;
@@ -1116,6 +1118,8 @@ do_replace(struct net *net, sockptr_t arg, unsigned int len)
return -ENOMEM;
if (tmp.num_counters == 0)
return -EINVAL;
+ if ((u64)len < (u64)tmp.size + sizeof(tmp))
+ return -EINVAL;
tmp.name[sizeof(tmp.name)-1] = 0;
@@ -1492,6 +1496,8 @@ compat_do_replace(struct net *net, sockptr_t arg, unsigned int len)
void *loc_cpu_entry;
struct ipt_entry *iter;
+ if (len < sizeof(tmp))
+ return -EINVAL;
if (copy_from_sockptr(&tmp, arg, sizeof(tmp)) != 0)
return -EFAULT;
@@ -1500,6 +1506,8 @@ compat_do_replace(struct net *net, sockptr_t arg, unsigned int len)
return -ENOMEM;
if (tmp.num_counters == 0)
return -EINVAL;
+ if ((u64)len < (u64)tmp.size + sizeof(tmp))
+ return -EINVAL;
tmp.name[sizeof(tmp.name)-1] = 0;
diff --git a/net/ipv4/route.c b/net/ipv4/route.c
index c8f76f56dc16..d36ace160d42 100644
--- a/net/ipv4/route.c
+++ b/net/ipv4/route.c
@@ -926,13 +926,11 @@ void ip_rt_send_redirect(struct sk_buff *skb)
icmp_send(skb, ICMP_REDIRECT, ICMP_REDIR_HOST, gw);
peer->rate_last = jiffies;
++peer->n_redirects;
-#ifdef CONFIG_IP_ROUTE_VERBOSE
- if (log_martians &&
+ if (IS_ENABLED(CONFIG_IP_ROUTE_VERBOSE) && log_martians &&
peer->n_redirects == ip_rt_redirect_number)
net_warn_ratelimited("host %pI4/if%d ignores redirects for %pI4 to %pI4\n",
&ip_hdr(skb)->saddr, inet_iif(skb),
&ip_hdr(skb)->daddr, &gw);
-#endif
}
out_put_peer:
inet_putpeer(peer);
diff --git a/net/ipv4/udp.c b/net/ipv4/udp.c
index 661d0e0d273f..c02bf011d4a6 100644
--- a/net/ipv4/udp.c
+++ b/net/ipv4/udp.c
@@ -582,6 +582,13 @@ static inline bool __udp_is_mcast_sock(struct net *net, const struct sock *sk,
}
DEFINE_STATIC_KEY_FALSE(udp_encap_needed_key);
+EXPORT_SYMBOL(udp_encap_needed_key);
+
+#if IS_ENABLED(CONFIG_IPV6)
+DEFINE_STATIC_KEY_FALSE(udpv6_encap_needed_key);
+EXPORT_SYMBOL(udpv6_encap_needed_key);
+#endif
+
void udp_encap_enable(void)
{
static_branch_inc(&udp_encap_needed_key);
diff --git a/net/ipv4/udp_offload.c b/net/ipv4/udp_offload.c
index b9880743765c..3498dd1d0694 100644
--- a/net/ipv4/udp_offload.c
+++ b/net/ipv4/udp_offload.c
@@ -449,8 +449,9 @@ static int skb_gro_receive_list(struct sk_buff *p, struct sk_buff *skb)
NAPI_GRO_CB(p)->count++;
p->data_len += skb->len;
- /* sk owenrship - if any - completely transferred to the aggregated packet */
+ /* sk ownership - if any - completely transferred to the aggregated packet */
skb->destructor = NULL;
+ skb->sk = NULL;
p->truesize += skb->truesize;
p->len += skb->len;
@@ -551,11 +552,19 @@ struct sk_buff *udp_gro_receive(struct list_head *head, struct sk_buff *skb,
unsigned int off = skb_gro_offset(skb);
int flush = 1;
- /* we can do L4 aggregation only if the packet can't land in a tunnel
- * otherwise we could corrupt the inner stream
+ /* We can do L4 aggregation only if the packet can't land in a tunnel
+ * otherwise we could corrupt the inner stream. Detecting such packets
+ * cannot be foolproof and the aggregation might still happen in some
+ * cases. Such packets should be caught in udp_unexpected_gso later.
*/
NAPI_GRO_CB(skb)->is_flist = 0;
if (!sk || !udp_sk(sk)->gro_receive) {
+ /* If the packet was locally encapsulated in a UDP tunnel that
+ * wasn't detected above, do not GRO.
+ */
+ if (skb->encapsulation)
+ goto out;
+
if (skb->dev->features & NETIF_F_GRO_FRAGLIST)
NAPI_GRO_CB(skb)->is_flist = sk ? !udp_test_bit(GRO_ENABLED, sk) : 1;
@@ -719,13 +728,7 @@ INDIRECT_CALLABLE_SCOPE int udp4_gro_complete(struct sk_buff *skb, int nhoff)
skb_shinfo(skb)->gso_type |= (SKB_GSO_FRAGLIST|SKB_GSO_UDP_L4);
skb_shinfo(skb)->gso_segs = NAPI_GRO_CB(skb)->count;
- if (skb->ip_summed == CHECKSUM_UNNECESSARY) {
- if (skb->csum_level < SKB_MAX_CSUM_LEVEL)
- skb->csum_level++;
- } else {
- skb->ip_summed = CHECKSUM_UNNECESSARY;
- skb->csum_level = 0;
- }
+ __skb_incr_checksum_unnecessary(skb);
return 0;
}
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