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Merge git://git.kernel.org/pub/scm/linux/kernel/git/pablo/nf-next

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Pablo Neira Ayuso says:

====================
Netfilter updates for net-next

The following patchset contains a final Netfilter pull request for net-next
4.2. This mostly addresses some fallout from the previous pull request, small
netns updates and a couple of new features for nfnetlink_log and the socket
match that didn't get in time for the previous pull request. More specifically
they are:

1) Add security context information to nfnetlink_queue, from Roman Kubiak.

2) Add support to restore the sk_mark into skb->mark through xt_socket,
   from Harout Hedeshian.

3) Force alignment of 16 bytes of per cpu xt_counters, from Eric Dumazet.

4) Rename br_netfilter.c to br_netfilter_hooks.c to prepare split of IPv6 code
   into a separated file.

5) Move the IPv6 code in br_netfilter into a separated file.

6) Remove unused RCV_SKB_FAIL() in nfnetlink_queue and nfetlink_log, from Eric
   Biederman.

7) Two liner to simplify netns logic in em_ipset_match().

8) Add missing includes to net/net_namespace.h to avoid compilation problems
   that result from not including linux/netfilter.h in netns headers.

9) Use a forward declaration instead of including linux/proc_fs.h from
   netns/netfilter.h

10) Add a new linux/netfilter_defs.h to replace the linux/netfilter.h inclusion
    in netns headers.

11) Remove spurious netfilter.h file included in the net tree, also from Eric
    Biederman.

12) Fix x_tables compilation warnings on 32 bits platforms that resulted from
    recent changes in x_tables counters, from Florian Westphal.
====================

Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
David S. Miller 2015-06-20 15:39:40 -07:00
commit 120119623b
31 changed files with 444 additions and 282 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

1
drivers/net/hamradio/bpqether.c
View File

@ -76,7 +76,6 @@
#include <linux/proc_fs.h>
#include <linux/seq_file.h>
#include <linux/stat.h>
#include <linux/netfilter.h>
#include <linux/module.h>
#include <linux/init.h>
#include <linux/rtnetlink.h>

2
drivers/net/ppp/pptp.c
View File

@ -28,8 +28,6 @@
#include <linux/file.h>
#include <linux/in.h>
#include <linux/ip.h>
#include <linux/netfilter.h>
#include <linux/netfilter_ipv4.h>
#include <linux/rcupdate.h>
#include <linux/spinlock.h>

1
drivers/net/wan/lapbether.c
View File

@ -40,7 +40,6 @@
#include <linux/interrupt.h>
#include <linux/notifier.h>
#include <linux/stat.h>
#include <linux/netfilter.h>
#include <linux/module.h>
#include <linux/lapb.h>
#include <linux/init.h>

6
include/linux/netfilter.h
View File

@ -10,7 +10,8 @@
#include <linux/wait.h>
#include <linux/list.h>
#include <linux/static_key.h>
#include <uapi/linux/netfilter.h>
#include <linux/netfilter_defs.h>
#ifdef CONFIG_NETFILTER
static inline int NF_DROP_GETERR(int verdict)
{
@ -38,9 +39,6 @@ static inline void nf_inet_addr_mask(const union nf_inet_addr *a1,
int netfilter_init(void);
/* Largest hook number + 1 */
#define NF_MAX_HOOKS 8
struct sk_buff;
struct nf_hook_ops;

14
include/linux/netfilter/x_tables.h
View File

@ -356,7 +356,8 @@ static inline unsigned long ifname_compare_aligned(const char *_a,
* so nothing needs to be done there.
*
* xt_percpu_counter_alloc returns the address of the percpu
* counter, or 0 on !SMP.
* counter, or 0 on !SMP. We force an alignment of 16 bytes
* so that bytes/packets share a common cache line.
*
* Hence caller must use IS_ERR_VALUE to check for error, this
* allows us to return 0 for single core systems without forcing
@ -365,12 +366,13 @@ static inline unsigned long ifname_compare_aligned(const char *_a,
static inline u64 xt_percpu_counter_alloc(void)
{
if (nr_cpu_ids > 1) {
void __percpu *res = alloc_percpu(struct xt_counters);
void __percpu *res = __alloc_percpu(sizeof(struct xt_counters),
sizeof(struct xt_counters));
if (res == NULL)
return (u64) -ENOMEM;
return (__force u64) res;
return (u64) (__force unsigned long) res;
}
return 0;
@ -378,14 +380,14 @@ static inline u64 xt_percpu_counter_alloc(void)
static inline void xt_percpu_counter_free(u64 pcnt)
{
if (nr_cpu_ids > 1)
free_percpu((void __percpu *) pcnt);
free_percpu((void __percpu *) (unsigned long) pcnt);
}
static inline struct xt_counters *
xt_get_this_cpu_counter(struct xt_counters *cnt)
{
if (nr_cpu_ids > 1)
return this_cpu_ptr((void __percpu *) cnt->pcnt);
return this_cpu_ptr((void __percpu *) (unsigned long) cnt->pcnt);
return cnt;
}
@ -394,7 +396,7 @@ static inline struct xt_counters *
xt_get_per_cpu_counter(struct xt_counters *cnt, unsigned int cpu)
{
if (nr_cpu_ids > 1)
return per_cpu_ptr((void __percpu *) cnt->pcnt, cpu);
return per_cpu_ptr((void __percpu *) (unsigned long) cnt->pcnt, cpu);
return cnt;
}

9
include/linux/netfilter_defs.h Normal file
View File

@ -0,0 +1,9 @@
#ifndef __LINUX_NETFILTER_CORE_H_
#define __LINUX_NETFILTER_CORE_H_
#include <uapi/linux/netfilter.h>
/* Largest hook number + 1, see uapi/linux/netfilter_decnet.h */
#define NF_MAX_HOOKS 8
#endif

2
include/net/net_namespace.h
View File

@ -28,6 +28,8 @@
#include <net/netns/xfrm.h>
#include <net/netns/mpls.h>
#include <linux/ns_common.h>
#include <linux/idr.h>
#include <linux/skbuff.h>
struct user_namespace;
struct proc_dir_entry;

60
include/net/netfilter/br_netfilter.h
View File

@ -1,6 +1,66 @@
#ifndef _BR_NETFILTER_H_
#define _BR_NETFILTER_H_
#include "../../../net/bridge/br_private.h"
static inline struct nf_bridge_info *nf_bridge_alloc(struct sk_buff *skb)
{
skb->nf_bridge = kzalloc(sizeof(struct nf_bridge_info), GFP_ATOMIC);
if (likely(skb->nf_bridge))
atomic_set(&(skb->nf_bridge->use), 1);
return skb->nf_bridge;
}
void nf_bridge_update_protocol(struct sk_buff *skb);
static inline struct nf_bridge_info *
nf_bridge_info_get(const struct sk_buff *skb)
{
return skb->nf_bridge;
}
unsigned int nf_bridge_encap_header_len(const struct sk_buff *skb);
static inline void nf_bridge_push_encap_header(struct sk_buff *skb)
{
unsigned int len = nf_bridge_encap_header_len(skb);
skb_push(skb, len);
skb->network_header -= len;
}
int br_nf_pre_routing_finish_bridge(struct sock *sk, struct sk_buff *skb);
static inline struct rtable *bridge_parent_rtable(const struct net_device *dev)
{
struct net_bridge_port *port;
port = br_port_get_rcu(dev);
return port ? &port->br->fake_rtable : NULL;
}
struct net_device *setup_pre_routing(struct sk_buff *skb);
void br_netfilter_enable(void);
#if IS_ENABLED(CONFIG_IPV6)
int br_validate_ipv6(struct sk_buff *skb);
unsigned int br_nf_pre_routing_ipv6(const struct nf_hook_ops *ops,
struct sk_buff *skb,
const struct nf_hook_state *state);
#else
static inline int br_validate_ipv6(struct sk_buff *skb)
{
return -1;
}
static inline unsigned int
br_nf_pre_routing_ipv6(const struct nf_hook_ops *ops, struct sk_buff *skb,
const struct nf_hook_state *state)
{
return NF_DROP;
}
#endif
#endif /* _BR_NETFILTER_H_ */

4
include/net/netns/netfilter.h
View File

@ -1,9 +1,9 @@
#ifndef __NETNS_NETFILTER_H
#define __NETNS_NETFILTER_H
#include <linux/proc_fs.h>
#include <linux/netfilter.h>
#include <linux/netfilter_defs.h>
struct proc_dir_entry;
struct nf_logger;
struct netns_nf {

2
include/net/netns/x_tables.h
View File

@ -2,7 +2,7 @@
#define __NETNS_X_TABLES_H
#include <linux/list.h>
#include <linux/netfilter.h>
#include <linux/netfilter_defs.h>
struct ebt_table;

3
include/uapi/linux/netfilter.h
View File

@ -4,7 +4,8 @@
#include <linux/types.h>
#include <linux/compiler.h>
#include <linux/sysctl.h>
#include <linux/in.h>
#include <linux/in6.h>
/* Responses from hook functions. */
#define NF_DROP 0

4
include/uapi/linux/netfilter/nfnetlink_queue.h
View File

@ -49,6 +49,7 @@ enum nfqnl_attr_type {
NFQA_EXP, /* nf_conntrack_netlink.h */
NFQA_UID, /* __u32 sk uid */
NFQA_GID, /* __u32 sk gid */
NFQA_SECCTX, /* security context string */
__NFQA_MAX
};
@ -102,7 +103,8 @@ enum nfqnl_attr_config {
#define NFQA_CFG_F_CONNTRACK (1 << 1)
#define NFQA_CFG_F_GSO (1 << 2)
#define NFQA_CFG_F_UID_GID (1 << 3)
#define NFQA_CFG_F_MAX (1 << 4)
#define NFQA_CFG_F_SECCTX (1 << 4)
#define NFQA_CFG_F_MAX (1 << 5)
/* flags for NFQA_SKB_INFO */
/* packet appears to have wrong checksums, but they are ok */

8
include/uapi/linux/netfilter/xt_socket.h
View File

@ -6,6 +6,7 @@
enum {
XT_SOCKET_TRANSPARENT = 1 << 0,
XT_SOCKET_NOWILDCARD = 1 << 1,
XT_SOCKET_RESTORESKMARK = 1 << 2,
};
struct xt_socket_mtinfo1 {
@ -18,4 +19,11 @@ struct xt_socket_mtinfo2 {
};
#define XT_SOCKET_FLAGS_V2 (XT_SOCKET_TRANSPARENT | XT_SOCKET_NOWILDCARD)
struct xt_socket_mtinfo3 {
__u8 flags;
};
#define XT_SOCKET_FLAGS_V3 (XT_SOCKET_TRANSPARENT \
| XT_SOCKET_NOWILDCARD \
| XT_SOCKET_RESTORESKMARK)
#endif /* _XT_SOCKET_H */

1
net/ax25/af_ax25.c
View File

@ -40,7 +40,6 @@
#include <linux/notifier.h>
#include <linux/proc_fs.h>
#include <linux/stat.h>
#include <linux/netfilter.h>
#include <linux/sysctl.h>
#include <linux/init.h>
#include <linux/spinlock.h>

1
net/ax25/ax25_in.c
View File

@ -23,7 +23,6 @@
#include <linux/inet.h>
#include <linux/netdevice.h>
#include <linux/skbuff.h>
#include <linux/netfilter.h>
#include <net/sock.h>
#include <net/tcp_states.h>
#include <asm/uaccess.h>

1
net/ax25/ax25_ip.c
View File

@ -31,7 +31,6 @@
#include <linux/notifier.h>
#include <linux/proc_fs.h>
#include <linux/stat.h>
#include <linux/netfilter.h>
#include <linux/sysctl.h>
#include <net/ip.h>
#include <net/arp.h>

1
net/ax25/ax25_out.c
View File

@ -24,7 +24,6 @@
#include <linux/inet.h>
#include <linux/netdevice.h>
#include <linux/skbuff.h>
#include <linux/netfilter.h>
#include <net/sock.h>
#include <asm/uaccess.h>
#include <linux/fcntl.h>

1
net/ax25/ax25_uid.c
View File

@ -34,7 +34,6 @@
#include <linux/proc_fs.h>
#include <linux/seq_file.h>
#include <linux/stat.h>
#include <linux/netfilter.h>
#include <linux/sysctl.h>
#include <linux/export.h>
#include <net/ip.h>

2
net/bridge/Makefile
View File

@ -12,6 +12,8 @@ bridge-$(CONFIG_SYSFS) += br_sysfs_if.o br_sysfs_br.o
bridge-$(subst m,y,$(CONFIG_BRIDGE_NETFILTER)) += br_nf_core.o
br_netfilter-y := br_netfilter_hooks.o
br_netfilter-$(subst m,y,$(CONFIG_IPV6)) += br_netfilter_ipv6.o
obj-$(CONFIG_BRIDGE_NETFILTER) += br_netfilter.o
bridge-$(CONFIG_BRIDGE_IGMP_SNOOPING) += br_multicast.o br_mdb.o

248
net/bridge/br_netfilter.c → net/bridge/br_netfilter_hooks.c
View File

@ -123,11 +123,6 @@ struct brnf_frag_data {
static DEFINE_PER_CPU(struct brnf_frag_data, brnf_frag_data_storage);
#endif
static struct nf_bridge_info *nf_bridge_info_get(const struct sk_buff *skb)
{
return skb->nf_bridge;
}
static void nf_bridge_info_free(struct sk_buff *skb)
{
if (skb->nf_bridge) {
@ -136,14 +131,6 @@ static void nf_bridge_info_free(struct sk_buff *skb)
}
}
static inline struct rtable *bridge_parent_rtable(const struct net_device *dev)
{
struct net_bridge_port *port;
port = br_port_get_rcu(dev);
return port ? &port->br->fake_rtable : NULL;
}
static inline struct net_device *bridge_parent(const struct net_device *dev)
{
struct net_bridge_port *port;
@ -152,15 +139,6 @@ static inline struct net_device *bridge_parent(const struct net_device *dev)
return port ? port->br->dev : NULL;
}
static inline struct nf_bridge_info *nf_bridge_alloc(struct sk_buff *skb)
{
skb->nf_bridge = kzalloc(sizeof(struct nf_bridge_info), GFP_ATOMIC);
if (likely(skb->nf_bridge))
atomic_set(&(skb->nf_bridge->use), 1);
return skb->nf_bridge;
}
static inline struct nf_bridge_info *nf_bridge_unshare(struct sk_buff *skb)
{
struct nf_bridge_info *nf_bridge = skb->nf_bridge;
@ -178,7 +156,7 @@ static inline struct nf_bridge_info *nf_bridge_unshare(struct sk_buff *skb)
return nf_bridge;
}
static unsigned int nf_bridge_encap_header_len(const struct sk_buff *skb)
unsigned int nf_bridge_encap_header_len(const struct sk_buff *skb)
{
switch (skb->protocol) {
case __cpu_to_be16(ETH_P_8021Q):
@ -190,14 +168,6 @@ static unsigned int nf_bridge_encap_header_len(const struct sk_buff *skb)
}
}
static inline void nf_bridge_push_encap_header(struct sk_buff *skb)
{
unsigned int len = nf_bridge_encap_header_len(skb);
skb_push(skb, len);
skb->network_header -= len;
}
static inline void nf_bridge_pull_encap_header(struct sk_buff *skb)
{
unsigned int len = nf_bridge_encap_header_len(skb);
@ -267,112 +237,7 @@ static int br_validate_ipv4(struct sk_buff *skb)
return -1;
}
/* We only check the length. A bridge shouldn't do any hop-by-hop stuff
* anyway
*/
static int check_hbh_len(struct sk_buff *skb)
{
unsigned char *raw = (u8 *)(ipv6_hdr(skb) + 1);
u32 pkt_len;
const unsigned char *nh = skb_network_header(skb);
int off = raw - nh;
int len = (raw[1] + 1) << 3;
if ((raw + len) - skb->data > skb_headlen(skb))
goto bad;
off += 2;
len -= 2;
while (len > 0) {
int optlen = nh[off + 1] + 2;
switch (nh[off]) {
case IPV6_TLV_PAD1:
optlen = 1;
break;
case IPV6_TLV_PADN:
break;
case IPV6_TLV_JUMBO:
if (nh[off + 1] != 4 || (off & 3) != 2)
goto bad;
pkt_len = ntohl(*(__be32 *)(nh + off + 2));
if (pkt_len <= IPV6_MAXPLEN ||
ipv6_hdr(skb)->payload_len)
goto bad;
if (pkt_len > skb->len - sizeof(struct ipv6hdr))
goto bad;
if (pskb_trim_rcsum(skb,
pkt_len + sizeof(struct ipv6hdr)))
goto bad;
nh = skb_network_header(skb);
break;
default:
if (optlen > len)
goto bad;
break;
}
off += optlen;
len -= optlen;
}
if (len == 0)
return 0;
bad:
return -1;
}
/* Equivalent to br_validate_ipv4 for IPv6 */
static int br_validate_ipv6(struct sk_buff *skb)
{
const struct ipv6hdr *hdr;
struct net_device *dev = skb->dev;
struct inet6_dev *idev = in6_dev_get(skb->dev);
u32 pkt_len;
u8 ip6h_len = sizeof(struct ipv6hdr);
if (!pskb_may_pull(skb, ip6h_len))
goto inhdr_error;
if (skb->len < ip6h_len)
goto drop;
hdr = ipv6_hdr(skb);
if (hdr->version != 6)
goto inhdr_error;
pkt_len = ntohs(hdr->payload_len);
if (pkt_len || hdr->nexthdr != NEXTHDR_HOP) {
if (pkt_len + ip6h_len > skb->len) {
IP6_INC_STATS_BH(dev_net(dev), idev,
IPSTATS_MIB_INTRUNCATEDPKTS);
goto drop;
}
if (pskb_trim_rcsum(skb, pkt_len + ip6h_len)) {
IP6_INC_STATS_BH(dev_net(dev), idev,
IPSTATS_MIB_INDISCARDS);
goto drop;
}
}
if (hdr->nexthdr == NEXTHDR_HOP && check_hbh_len(skb))
goto drop;
memset(IP6CB(skb), 0, sizeof(struct inet6_skb_parm));
/* No IP options in IPv6 header; however it should be
* checked if some next headers need special treatment
*/
return 0;
inhdr_error:
IP6_INC_STATS_BH(dev_net(dev), idev, IPSTATS_MIB_INHDRERRORS);
drop:
return -1;
}
static void nf_bridge_update_protocol(struct sk_buff *skb)
void nf_bridge_update_protocol(struct sk_buff *skb)
{
switch (skb->nf_bridge->orig_proto) {
case BRNF_PROTO_8021Q:
@ -391,7 +256,7 @@ static void nf_bridge_update_protocol(struct sk_buff *skb)
* don't, we use the neighbour framework to find out. In both cases, we make
* sure that br_handle_frame_finish() is called afterwards.
*/
static int br_nf_pre_routing_finish_bridge(struct sock *sk, struct sk_buff *skb)
int br_nf_pre_routing_finish_bridge(struct sock *sk, struct sk_buff *skb)
{
struct neighbour *neigh;
struct dst_entry *dst;
@ -431,77 +296,11 @@ static int br_nf_pre_routing_finish_bridge(struct sock *sk, struct sk_buff *skb)
return 0;
}
static bool daddr_was_changed(const struct sk_buff *skb,
const struct nf_bridge_info *nf_bridge)
static inline bool
br_nf_ipv4_daddr_was_changed(const struct sk_buff *skb,
const struct nf_bridge_info *nf_bridge)
{
switch (skb->protocol) {
case htons(ETH_P_IP):
return ip_hdr(skb)->daddr != nf_bridge->ipv4_daddr;
case htons(ETH_P_IPV6):
return memcmp(&nf_bridge->ipv6_daddr, &ipv6_hdr(skb)->daddr,
sizeof(ipv6_hdr(skb)->daddr)) != 0;
default:
return false;
}
}
/* PF_BRIDGE/PRE_ROUTING: Undo the changes made for ip6tables
* PREROUTING and continue the bridge PRE_ROUTING hook. See comment
* for br_nf_pre_routing_finish(), same logic is used here but
* equivalent IPv6 function ip6_route_input() called indirectly.
*/
static int br_nf_pre_routing_finish_ipv6(struct sock *sk, struct sk_buff *skb)
{
struct nf_bridge_info *nf_bridge = nf_bridge_info_get(skb);
struct rtable *rt;
struct net_device *dev = skb->dev;
const struct nf_ipv6_ops *v6ops = nf_get_ipv6_ops();
nf_bridge->frag_max_size = IP6CB(skb)->frag_max_size;
if (nf_bridge->pkt_otherhost) {
skb->pkt_type = PACKET_OTHERHOST;
nf_bridge->pkt_otherhost = false;
}
nf_bridge->mask &= ~BRNF_NF_BRIDGE_PREROUTING;
if (daddr_was_changed(skb, nf_bridge)) {
skb_dst_drop(skb);
v6ops->route_input(skb);
if (skb_dst(skb)->error) {
kfree_skb(skb);
return 0;
}
if (skb_dst(skb)->dev == dev) {
skb->dev = nf_bridge->physindev;
nf_bridge_update_protocol(skb);
nf_bridge_push_encap_header(skb);
NF_HOOK_THRESH(NFPROTO_BRIDGE, NF_BR_PRE_ROUTING,
sk, skb, skb->dev, NULL,
br_nf_pre_routing_finish_bridge,
1);
return 0;
}
ether_addr_copy(eth_hdr(skb)->h_dest, dev->dev_addr);
skb->pkt_type = PACKET_HOST;
} else {
rt = bridge_parent_rtable(nf_bridge->physindev);
if (!rt) {
kfree_skb(skb);
return 0;
}
skb_dst_set_noref(skb, &rt->dst);
}
skb->dev = nf_bridge->physindev;
nf_bridge_update_protocol(skb);
nf_bridge_push_encap_header(skb);
NF_HOOK_THRESH(NFPROTO_BRIDGE, NF_BR_PRE_ROUTING, sk, skb,
skb->dev, NULL,
br_handle_frame_finish, 1);
return 0;
return ip_hdr(skb)->daddr != nf_bridge->ipv4_daddr;
}
/* This requires some explaining. If DNAT has taken place,
@ -558,7 +357,7 @@ static int br_nf_pre_routing_finish(struct sock *sk, struct sk_buff *skb)
nf_bridge->pkt_otherhost = false;
}
nf_bridge->mask &= ~BRNF_NF_BRIDGE_PREROUTING;
if (daddr_was_changed(skb, nf_bridge)) {
if (br_nf_ipv4_daddr_was_changed(skb, nf_bridge)) {
if ((err = ip_route_input(skb, iph->daddr, iph->saddr, iph->tos, dev))) {
struct in_device *in_dev = __in_dev_get_rcu(dev);
@ -636,7 +435,7 @@ static struct net_device *brnf_get_logical_dev(struct sk_buff *skb, const struct
}
/* Some common code for IPv4/IPv6 */
static struct net_device *setup_pre_routing(struct sk_buff *skb)
struct net_device *setup_pre_routing(struct sk_buff *skb)
{
struct nf_bridge_info *nf_bridge = nf_bridge_info_get(skb);
@ -659,35 +458,6 @@ static struct net_device *setup_pre_routing(struct sk_buff *skb)
return skb->dev;
}
/* Replicate the checks that IPv6 does on packet reception and pass the packet
* to ip6tables.
*/
static unsigned int br_nf_pre_routing_ipv6(const struct nf_hook_ops *ops,
struct sk_buff *skb,
const struct nf_hook_state *state)
{
struct nf_bridge_info *nf_bridge;
if (br_validate_ipv6(skb))
return NF_DROP;
nf_bridge_put(skb->nf_bridge);
if (!nf_bridge_alloc(skb))
return NF_DROP;
if (!setup_pre_routing(skb))
return NF_DROP;
nf_bridge = nf_bridge_info_get(skb);
nf_bridge->ipv6_daddr = ipv6_hdr(skb)->daddr;
skb->protocol = htons(ETH_P_IPV6);
NF_HOOK(NFPROTO_IPV6, NF_INET_PRE_ROUTING, state->sk, skb,
skb->dev, NULL,
br_nf_pre_routing_finish_ipv6);
return NF_STOLEN;
}
/* Direct IPv6 traffic to br_nf_pre_routing_ipv6.
* Replicate the checks that IPv4 does on packet reception.
* Set skb->dev to the bridge device (i.e. parent of the

245
net/bridge/br_netfilter_ipv6.c Normal file
View File

@ -0,0 +1,245 @@
/*
* Handle firewalling
* Linux ethernet bridge
*
* Authors:
* Lennert Buytenhek <buytenh@gnu.org>
* Bart De Schuymer <bdschuym@pandora.be>
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation; either version
* 2 of the License, or (at your option) any later version.
*
* Lennert dedicates this file to Kerstin Wurdinger.
*/
#include <linux/module.h>
#include <linux/kernel.h>
#include <linux/slab.h>
#include <linux/ip.h>
#include <linux/netdevice.h>
#include <linux/skbuff.h>
#include <linux/if_arp.h>
#include <linux/if_ether.h>
#include <linux/if_vlan.h>
#include <linux/if_pppox.h>
#include <linux/ppp_defs.h>
#include <linux/netfilter_bridge.h>
#include <linux/netfilter_ipv4.h>
#include <linux/netfilter_ipv6.h>
#include <linux/netfilter_arp.h>
#include <linux/in_route.h>
#include <linux/inetdevice.h>
#include <net/ip.h>
#include <net/ipv6.h>
#include <net/addrconf.h>
#include <net/route.h>
#include <net/netfilter/br_netfilter.h>
#include <asm/uaccess.h>
#include "br_private.h"
#ifdef CONFIG_SYSCTL
#include <linux/sysctl.h>
#endif
/* We only check the length. A bridge shouldn't do any hop-by-hop stuff
* anyway
*/
static int br_nf_check_hbh_len(struct sk_buff *skb)
{
unsigned char *raw = (u8 *)(ipv6_hdr(skb) + 1);
u32 pkt_len;
const unsigned char *nh = skb_network_header(skb);
int off = raw - nh;
int len = (raw[1] + 1) << 3;
if ((raw + len) - skb->data > skb_headlen(skb))
goto bad;
off += 2;
len -= 2;
while (len > 0) {
int optlen = nh[off + 1] + 2;
switch (nh[off]) {
case IPV6_TLV_PAD1:
optlen = 1;
break;
case IPV6_TLV_PADN:
break;
case IPV6_TLV_JUMBO:
if (nh[off + 1] != 4 || (off & 3) != 2)
goto bad;
pkt_len = ntohl(*(__be32 *)(nh + off + 2));
if (pkt_len <= IPV6_MAXPLEN ||
ipv6_hdr(skb)->payload_len)
goto bad;
if (pkt_len > skb->len - sizeof(struct ipv6hdr))
goto bad;
if (pskb_trim_rcsum(skb,
pkt_len + sizeof(struct ipv6hdr)))
goto bad;
nh = skb_network_header(skb);
break;
default:
if (optlen > len)
goto bad;
break;
}
off += optlen;
len -= optlen;
}
if (len == 0)
return 0;
bad:
return -1;
}
int br_validate_ipv6(struct sk_buff *skb)
{
const struct ipv6hdr *hdr;
struct net_device *dev = skb->dev;
struct inet6_dev *idev = in6_dev_get(skb->dev);
u32 pkt_len;
u8 ip6h_len = sizeof(struct ipv6hdr);
if (!pskb_may_pull(skb, ip6h_len))
goto inhdr_error;
if (skb->len < ip6h_len)
goto drop;
hdr = ipv6_hdr(skb);
if (hdr->version != 6)
goto inhdr_error;
pkt_len = ntohs(hdr->payload_len);
if (pkt_len || hdr->nexthdr != NEXTHDR_HOP) {
if (pkt_len + ip6h_len > skb->len) {
IP6_INC_STATS_BH(dev_net(dev), idev,
IPSTATS_MIB_INTRUNCATEDPKTS);
goto drop;
}
if (pskb_trim_rcsum(skb, pkt_len + ip6h_len)) {
IP6_INC_STATS_BH(dev_net(dev), idev,
IPSTATS_MIB_INDISCARDS);
goto drop;
}
}
if (hdr->nexthdr == NEXTHDR_HOP && br_nf_check_hbh_len(skb))
goto drop;
memset(IP6CB(skb), 0, sizeof(struct inet6_skb_parm));
/* No IP options in IPv6 header; however it should be
* checked if some next headers need special treatment
*/
return 0;
inhdr_error:
IP6_INC_STATS_BH(dev_net(dev), idev, IPSTATS_MIB_INHDRERRORS);
drop:
return -1;
}
static inline bool
br_nf_ipv6_daddr_was_changed(const struct sk_buff *skb,
const struct nf_bridge_info *nf_bridge)
{
return memcmp(&nf_bridge->ipv6_daddr, &ipv6_hdr(skb)->daddr,
sizeof(ipv6_hdr(skb)->daddr)) != 0;
}
/* PF_BRIDGE/PRE_ROUTING: Undo the changes made for ip6tables
* PREROUTING and continue the bridge PRE_ROUTING hook. See comment
* for br_nf_pre_routing_finish(), same logic is used here but
* equivalent IPv6 function ip6_route_input() called indirectly.
*/
static int br_nf_pre_routing_finish_ipv6(struct sock *sk, struct sk_buff *skb)
{
struct nf_bridge_info *nf_bridge = nf_bridge_info_get(skb);
struct rtable *rt;
struct net_device *dev = skb->dev;
const struct nf_ipv6_ops *v6ops = nf_get_ipv6_ops();
nf_bridge->frag_max_size = IP6CB(skb)->frag_max_size;
if (nf_bridge->pkt_otherhost) {
skb->pkt_type = PACKET_OTHERHOST;
nf_bridge->pkt_otherhost = false;
}
nf_bridge->mask &= ~BRNF_NF_BRIDGE_PREROUTING;
if (br_nf_ipv6_daddr_was_changed(skb, nf_bridge)) {
skb_dst_drop(skb);
v6ops->route_input(skb);
if (skb_dst(skb)->error) {
kfree_skb(skb);
return 0;
}
if (skb_dst(skb)->dev == dev) {
skb->dev = nf_bridge->physindev;
nf_bridge_update_protocol(skb);
nf_bridge_push_encap_header(skb);
NF_HOOK_THRESH(NFPROTO_BRIDGE, NF_BR_PRE_ROUTING,
sk, skb, skb->dev, NULL,
br_nf_pre_routing_finish_bridge,
1);
return 0;
}
ether_addr_copy(eth_hdr(skb)->h_dest, dev->dev_addr);
skb->pkt_type = PACKET_HOST;
} else {
rt = bridge_parent_rtable(nf_bridge->physindev);
if (!rt) {
kfree_skb(skb);
return 0;
}
skb_dst_set_noref(skb, &rt->dst);
}
skb->dev = nf_bridge->physindev;
nf_bridge_update_protocol(skb);
nf_bridge_push_encap_header(skb);
NF_HOOK_THRESH(NFPROTO_BRIDGE, NF_BR_PRE_ROUTING, sk, skb,
skb->dev, NULL,
br_handle_frame_finish, 1);
return 0;
}
/* Replicate the checks that IPv6 does on packet reception and pass the packet
* to ip6tables.
*/
unsigned int br_nf_pre_routing_ipv6(const struct nf_hook_ops *ops,
struct sk_buff *skb,
const struct nf_hook_state *state)
{
struct nf_bridge_info *nf_bridge;
if (br_validate_ipv6(skb))
return NF_DROP;
nf_bridge_put(skb->nf_bridge);
if (!nf_bridge_alloc(skb))
return NF_DROP;
if (!setup_pre_routing(skb))
return NF_DROP;
nf_bridge = nf_bridge_info_get(skb);
nf_bridge->ipv6_daddr = ipv6_hdr(skb)->daddr;
skb->protocol = htons(ETH_P_IPV6);
NF_HOOK(NFPROTO_IPV6, NF_INET_PRE_ROUTING, state->sk, skb,
skb->dev, NULL,
br_nf_pre_routing_finish_ipv6);
return NF_STOLEN;
}

1
net/ipv6/output_core.c
View File

@ -8,6 +8,7 @@
#include <net/ip6_fib.h>
#include <net/addrconf.h>
#include <net/secure_seq.h>
#include <linux/netfilter.h>
static u32 __ipv6_select_ident(struct net *net, u32 hashrnd,
const struct in6_addr *dst,

1
net/netfilter/nf_synproxy_core.c
View File

@ -11,6 +11,7 @@
#include <asm/unaligned.h>
#include <net/tcp.h>
#include <net/netns/generic.h>
#include <linux/proc_fs.h>
#include <linux/netfilter_ipv4/ip_tables.h>
#include <linux/netfilter/x_tables.h>

2
net/netfilter/nfnetlink_log.c
View File

@ -598,8 +598,6 @@ __build_packet_message(struct nfnl_log_net *log,
return -1;
}
#define RCV_SKB_FAIL(err) do { netlink_ack(skb, nlh, (err)); return; } while (0)
static struct nf_loginfo default_loginfo = {
.type = NF_LOG_TYPE_ULOG,
.u = {

37
net/netfilter/nfnetlink_queue_core.c
View File

@ -278,6 +278,23 @@ static int nfqnl_put_sk_uidgid(struct sk_buff *skb, struct sock *sk)
return -1;
}
static u32 nfqnl_get_sk_secctx(struct sk_buff *skb, char **secdata)
{
u32 seclen = 0;
#if IS_ENABLED(CONFIG_NETWORK_SECMARK)
if (!skb || !sk_fullsock(skb->sk))
return 0;
read_lock_bh(&skb->sk->sk_callback_lock);
if (skb->secmark)
security_secid_to_secctx(skb->secmark, secdata, &seclen);
read_unlock_bh(&skb->sk->sk_callback_lock);
#endif
return seclen;
}
static struct sk_buff *
nfqnl_build_packet_message(struct net *net, struct nfqnl_instance *queue,
struct nf_queue_entry *entry,
@ -297,6 +314,8 @@ nfqnl_build_packet_message(struct net *net, struct nfqnl_instance *queue,
struct nf_conn *ct = NULL;
enum ip_conntrack_info uninitialized_var(ctinfo);
bool csum_verify;
char *secdata = NULL;
u32 seclen = 0;
size = nlmsg_total_size(sizeof(struct nfgenmsg))
+ nla_total_size(sizeof(struct nfqnl_msg_packet_hdr))
@ -352,6 +371,12 @@ nfqnl_build_packet_message(struct net *net, struct nfqnl_instance *queue,
+ nla_total_size(sizeof(u_int32_t))); /* gid */
}
if ((queue->flags & NFQA_CFG_F_SECCTX) && entskb->sk) {
seclen = nfqnl_get_sk_secctx(entskb, &secdata);
if (seclen)
size += nla_total_size(seclen);
}
skb = nfnetlink_alloc_skb(net, size, queue->peer_portid,
GFP_ATOMIC);
if (!skb) {
@ -479,6 +504,9 @@ nfqnl_build_packet_message(struct net *net, struct nfqnl_instance *queue,
nfqnl_put_sk_uidgid(skb, entskb->sk) < 0)
goto nla_put_failure;
if (seclen && nla_put(skb, NFQA_SECCTX, seclen, secdata))
goto nla_put_failure;
if (ct && nfqnl_ct_put(skb, ct, ctinfo) < 0)
goto nla_put_failure;
@ -806,8 +834,6 @@ nfqnl_dev_drop(struct net *net, int ifindex)
rcu_read_unlock();
}
#define RCV_SKB_FAIL(err) do { netlink_ack(skb, nlh, (err)); return; } while (0)
static int
nfqnl_rcv_dev_event(struct notifier_block *this,
unsigned long event, void *ptr)
@ -1142,7 +1168,12 @@ nfqnl_recv_config(struct sock *ctnl, struct sk_buff *skb,
ret = -EOPNOTSUPP;
goto err_out_unlock;
}
#if !IS_ENABLED(CONFIG_NETWORK_SECMARK)
if (flags & mask & NFQA_CFG_F_SECCTX) {
ret = -EOPNOTSUPP;
goto err_out_unlock;
}
#endif
spin_lock_bh(&queue->lock);
queue->flags &= ~mask;
queue->flags |= flags & mask;

59
net/netfilter/xt_socket.c
View File

@ -205,6 +205,7 @@ static bool
socket_match(const struct sk_buff *skb, struct xt_action_param *par,
const struct xt_socket_mtinfo1 *info)
{
struct sk_buff *pskb = (struct sk_buff *)skb;
struct sock *sk = skb->sk;
if (!sk)
@ -226,6 +227,10 @@ socket_match(const struct sk_buff *skb, struct xt_action_param *par,
if (info->flags & XT_SOCKET_TRANSPARENT)
transparent = xt_socket_sk_is_transparent(sk);
if (info->flags & XT_SOCKET_RESTORESKMARK && !wildcard &&
transparent)
pskb->mark = sk->sk_mark;
if (sk != skb->sk)
sock_gen_put(sk);
@ -247,7 +252,7 @@ socket_mt4_v0(const struct sk_buff *skb, struct xt_action_param *par)
}
static bool
socket_mt4_v1_v2(const struct sk_buff *skb, struct xt_action_param *par)
socket_mt4_v1_v2_v3(const struct sk_buff *skb, struct xt_action_param *par)
{
return socket_match(skb, par, par->matchinfo);
}
@ -371,9 +376,10 @@ static struct sock *xt_socket_lookup_slow_v6(const struct sk_buff *skb,
}
static bool
socket_mt6_v1_v2(const struct sk_buff *skb, struct xt_action_param *par)
socket_mt6_v1_v2_v3(const struct sk_buff *skb, struct xt_action_param *par)
{
const struct xt_socket_mtinfo1 *info = (struct xt_socket_mtinfo1 *) par->matchinfo;
struct sk_buff *pskb = (struct sk_buff *)skb;
struct sock *sk = skb->sk;
if (!sk)
@ -395,6 +401,10 @@ socket_mt6_v1_v2(const struct sk_buff *skb, struct xt_action_param *par)
if (info->flags & XT_SOCKET_TRANSPARENT)
transparent = xt_socket_sk_is_transparent(sk);
if (info->flags & XT_SOCKET_RESTORESKMARK && !wildcard &&
transparent)
pskb->mark = sk->sk_mark;
if (sk != skb->sk)
sock_gen_put(sk);
@ -428,6 +438,19 @@ static int socket_mt_v2_check(const struct xt_mtchk_param *par)
return 0;
}
static int socket_mt_v3_check(const struct xt_mtchk_param *par)
{
const struct xt_socket_mtinfo3 *info =
(struct xt_socket_mtinfo3 *)par->matchinfo;
if (info->flags & ~XT_SOCKET_FLAGS_V3) {
pr_info("unknown flags 0x%x\n",
info->flags & ~XT_SOCKET_FLAGS_V3);
return -EINVAL;
}
return 0;
}
static struct xt_match socket_mt_reg[] __read_mostly = {
{
.name = "socket",
@ -442,7 +465,7 @@ static struct xt_match socket_mt_reg[] __read_mostly = {
.name = "socket",
.revision = 1,
.family = NFPROTO_IPV4,
.match = socket_mt4_v1_v2,
.match = socket_mt4_v1_v2_v3,
.checkentry = socket_mt_v1_check,
.matchsize = sizeof(struct xt_socket_mtinfo1),
.hooks = (1 << NF_INET_PRE_ROUTING) |
@ -454,7 +477,7 @@ static struct xt_match socket_mt_reg[] __read_mostly = {
.name = "socket",
.revision = 1,
.family = NFPROTO_IPV6,
.match = socket_mt6_v1_v2,
.match = socket_mt6_v1_v2_v3,
.checkentry = socket_mt_v1_check,
.matchsize = sizeof(struct xt_socket_mtinfo1),
.hooks = (1 << NF_INET_PRE_ROUTING) |
@ -466,7 +489,7 @@ static struct xt_match socket_mt_reg[] __read_mostly = {
.name = "socket",
.revision = 2,
.family = NFPROTO_IPV4,
.match = socket_mt4_v1_v2,
.match = socket_mt4_v1_v2_v3,
.checkentry = socket_mt_v2_check,
.matchsize = sizeof(struct xt_socket_mtinfo1),
.hooks = (1 << NF_INET_PRE_ROUTING) |
@ -478,13 +501,37 @@ static struct xt_match socket_mt_reg[] __read_mostly = {
.name = "socket",
.revision = 2,
.family = NFPROTO_IPV6,
.match = socket_mt6_v1_v2,
.match = socket_mt6_v1_v2_v3,
.checkentry = socket_mt_v2_check,
.matchsize = sizeof(struct xt_socket_mtinfo1),
.hooks = (1 << NF_INET_PRE_ROUTING) |
(1 << NF_INET_LOCAL_IN),
.me = THIS_MODULE,
},
#endif
{
.name = "socket",
.revision = 3,
.family = NFPROTO_IPV4,
.match = socket_mt4_v1_v2_v3,
.checkentry = socket_mt_v3_check,
.matchsize = sizeof(struct xt_socket_mtinfo1),
.hooks = (1 << NF_INET_PRE_ROUTING) |
(1 << NF_INET_LOCAL_IN),
.me = THIS_MODULE,
},
#ifdef XT_SOCKET_HAVE_IPV6
{
.name = "socket",
.revision = 3,
.family = NFPROTO_IPV6,
.match = socket_mt6_v1_v2_v3,
.checkentry = socket_mt_v3_check,
.matchsize = sizeof(struct xt_socket_mtinfo1),
.hooks = (1 << NF_INET_PRE_ROUTING) |
(1 << NF_INET_LOCAL_IN),
.me = THIS_MODULE,
},
#endif
};

1
net/netrom/nr_route.c
View File

@ -31,7 +31,6 @@
#include <linux/mm.h>
#include <linux/interrupt.h>
#include <linux/notifier.h>
#include <linux/netfilter.h>
#include <linux/init.h>
#include <linux/spinlock.h>
#include <net/netrom.h>

1
net/rose/rose_link.c
View File

@ -25,7 +25,6 @@
#include <linux/fcntl.h>
#include <linux/mm.h>
#include <linux/interrupt.h>
#include <linux/netfilter.h>
#include <net/rose.h>
static void rose_ftimer_expiry(unsigned long);

1
net/rose/rose_route.c
View File

@ -31,7 +31,6 @@
#include <linux/mm.h>
#include <linux/interrupt.h>
#include <linux/notifier.h>
#include <linux/netfilter.h>
#include <linux/init.h>
#include <net/rose.h>
#include <linux/seq_file.h>

4
net/sched/em_ipset.c
View File

@ -92,8 +92,8 @@ static int em_ipset_match(struct sk_buff *skb, struct tcf_ematch *em,
rcu_read_lock();
if (dev && skb->skb_iif)
indev = dev_get_by_index_rcu(dev_net(dev), skb->skb_iif);
if (skb->skb_iif)
indev = dev_get_by_index_rcu(em->net, skb->skb_iif);
acpar.in = indev ? indev : dev;
acpar.out = dev;

3
security/selinux/xfrm.c
View File

@ -35,9 +35,6 @@
#include <linux/init.h>
#include <linux/security.h>
#include <linux/types.h>
#include <linux/netfilter.h>
#include <linux/netfilter_ipv4.h>
#include <linux/netfilter_ipv6.h>
#include <linux/slab.h>
#include <linux/ip.h>
#include <linux/tcp.h>