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-rw-r--r--net/ipv4/netfilter/arp_tables.c105
-rw-r--r--net/ipv4/netfilter/ip_tables.c104
-rw-r--r--net/ipv4/netfilter/ipt_CLUSTERIP.c2
-rw-r--r--net/ipv4/netfilter/nf_reject_ipv4.c21
4 files changed, 81 insertions, 151 deletions
diff --git a/net/ipv4/netfilter/arp_tables.c b/net/ipv4/netfilter/arp_tables.c
index b167f4a5b684..d1e04d2b5170 100644
--- a/net/ipv4/netfilter/arp_tables.c
+++ b/net/ipv4/netfilter/arp_tables.c
@@ -787,8 +787,7 @@ static int compat_table_info(const struct xt_table_info *info,
}
#endif
-static int get_info(struct net *net, void __user *user,
- const int *len, int compat)
+static int get_info(struct net *net, void __user *user, const int *len)
{
char name[XT_TABLE_MAXNAMELEN];
struct xt_table *t;
@@ -802,7 +801,7 @@ static int get_info(struct net *net, void __user *user,
name[XT_TABLE_MAXNAMELEN-1] = '\0';
#ifdef CONFIG_COMPAT
- if (compat)
+ if (in_compat_syscall())
xt_compat_lock(NFPROTO_ARP);
#endif
t = xt_request_find_table_lock(net, NFPROTO_ARP, name);
@@ -812,7 +811,7 @@ static int get_info(struct net *net, void __user *user,
#ifdef CONFIG_COMPAT
struct xt_table_info tmp;
- if (compat) {
+ if (in_compat_syscall()) {
ret = compat_table_info(private, &tmp);
xt_compat_flush_offsets(NFPROTO_ARP);
private = &tmp;
@@ -837,7 +836,7 @@ static int get_info(struct net *net, void __user *user,
} else
ret = PTR_ERR(t);
#ifdef CONFIG_COMPAT
- if (compat)
+ if (in_compat_syscall())
xt_compat_unlock(NFPROTO_ARP);
#endif
return ret;
@@ -948,8 +947,7 @@ static int __do_replace(struct net *net, const char *name,
return ret;
}
-static int do_replace(struct net *net, const void __user *user,
- unsigned int len)
+static int do_replace(struct net *net, sockptr_t arg, unsigned int len)
{
int ret;
struct arpt_replace tmp;
@@ -957,7 +955,7 @@ static int do_replace(struct net *net, const void __user *user,
void *loc_cpu_entry;
struct arpt_entry *iter;
- if (copy_from_user(&tmp, user, sizeof(tmp)) != 0)
+ if (copy_from_sockptr(&tmp, arg, sizeof(tmp)) != 0)
return -EFAULT;
/* overflow check */
@@ -973,8 +971,8 @@ static int do_replace(struct net *net, const void __user *user,
return -ENOMEM;
loc_cpu_entry = newinfo->entries;
- if (copy_from_user(loc_cpu_entry, user + sizeof(tmp),
- tmp.size) != 0) {
+ if (copy_from_sockptr_offset(loc_cpu_entry, arg, sizeof(tmp),
+ tmp.size) != 0) {
ret = -EFAULT;
goto free_newinfo;
}
@@ -997,8 +995,7 @@ static int do_replace(struct net *net, const void __user *user,
return ret;
}
-static int do_add_counters(struct net *net, const void __user *user,
- unsigned int len, int compat)
+static int do_add_counters(struct net *net, sockptr_t arg, unsigned int len)
{
unsigned int i;
struct xt_counters_info tmp;
@@ -1009,7 +1006,7 @@ static int do_add_counters(struct net *net, const void __user *user,
struct arpt_entry *iter;
unsigned int addend;
- paddc = xt_copy_counters_from_user(user, len, &tmp, compat);
+ paddc = xt_copy_counters(arg, len, &tmp);
if (IS_ERR(paddc))
return PTR_ERR(paddc);
@@ -1246,8 +1243,7 @@ out_unlock:
return ret;
}
-static int compat_do_replace(struct net *net, void __user *user,
- unsigned int len)
+static int compat_do_replace(struct net *net, sockptr_t arg, unsigned int len)
{
int ret;
struct compat_arpt_replace tmp;
@@ -1255,7 +1251,7 @@ static int compat_do_replace(struct net *net, void __user *user,
void *loc_cpu_entry;
struct arpt_entry *iter;
- if (copy_from_user(&tmp, user, sizeof(tmp)) != 0)
+ if (copy_from_sockptr(&tmp, arg, sizeof(tmp)) != 0)
return -EFAULT;
/* overflow check */
@@ -1271,7 +1267,8 @@ static int compat_do_replace(struct net *net, void __user *user,
return -ENOMEM;
loc_cpu_entry = newinfo->entries;
- if (copy_from_user(loc_cpu_entry, user + sizeof(tmp), tmp.size) != 0) {
+ if (copy_from_sockptr_offset(loc_cpu_entry, arg, sizeof(tmp),
+ tmp.size) != 0) {
ret = -EFAULT;
goto free_newinfo;
}
@@ -1294,30 +1291,6 @@ static int compat_do_replace(struct net *net, void __user *user,
return ret;
}
-static int compat_do_arpt_set_ctl(struct sock *sk, int cmd, void __user *user,
- unsigned int len)
-{
- int ret;
-
- if (!ns_capable(sock_net(sk)->user_ns, CAP_NET_ADMIN))
- return -EPERM;
-
- switch (cmd) {
- case ARPT_SO_SET_REPLACE:
- ret = compat_do_replace(sock_net(sk), user, len);
- break;
-
- case ARPT_SO_SET_ADD_COUNTERS:
- ret = do_add_counters(sock_net(sk), user, len, 1);
- break;
-
- default:
- ret = -EINVAL;
- }
-
- return ret;
-}
-
static int compat_copy_entry_to_user(struct arpt_entry *e, void __user **dstptr,
compat_uint_t *size,
struct xt_counters *counters,
@@ -1425,32 +1398,10 @@ static int compat_get_entries(struct net *net,
xt_compat_unlock(NFPROTO_ARP);
return ret;
}
-
-static int do_arpt_get_ctl(struct sock *, int, void __user *, int *);
-
-static int compat_do_arpt_get_ctl(struct sock *sk, int cmd, void __user *user,
- int *len)
-{
- int ret;
-
- if (!ns_capable(sock_net(sk)->user_ns, CAP_NET_ADMIN))
- return -EPERM;
-
- switch (cmd) {
- case ARPT_SO_GET_INFO:
- ret = get_info(sock_net(sk), user, len, 1);
- break;
- case ARPT_SO_GET_ENTRIES:
- ret = compat_get_entries(sock_net(sk), user, len);
- break;
- default:
- ret = do_arpt_get_ctl(sk, cmd, user, len);
- }
- return ret;
-}
#endif
-static int do_arpt_set_ctl(struct sock *sk, int cmd, void __user *user, unsigned int len)
+static int do_arpt_set_ctl(struct sock *sk, int cmd, sockptr_t arg,
+ unsigned int len)
{
int ret;
@@ -1459,11 +1410,16 @@ static int do_arpt_set_ctl(struct sock *sk, int cmd, void __user *user, unsigned
switch (cmd) {
case ARPT_SO_SET_REPLACE:
- ret = do_replace(sock_net(sk), user, len);
+#ifdef CONFIG_COMPAT
+ if (in_compat_syscall())
+ ret = compat_do_replace(sock_net(sk), arg, len);
+ else
+#endif
+ ret = do_replace(sock_net(sk), arg, len);
break;
case ARPT_SO_SET_ADD_COUNTERS:
- ret = do_add_counters(sock_net(sk), user, len, 0);
+ ret = do_add_counters(sock_net(sk), arg, len);
break;
default:
@@ -1482,11 +1438,16 @@ static int do_arpt_get_ctl(struct sock *sk, int cmd, void __user *user, int *len
switch (cmd) {
case ARPT_SO_GET_INFO:
- ret = get_info(sock_net(sk), user, len, 0);
+ ret = get_info(sock_net(sk), user, len);
break;
case ARPT_SO_GET_ENTRIES:
- ret = get_entries(sock_net(sk), user, len);
+#ifdef CONFIG_COMPAT
+ if (in_compat_syscall())
+ ret = compat_get_entries(sock_net(sk), user, len);
+ else
+#endif
+ ret = get_entries(sock_net(sk), user, len);
break;
case ARPT_SO_GET_REVISION_TARGET: {
@@ -1610,15 +1571,9 @@ static struct nf_sockopt_ops arpt_sockopts = {
.set_optmin = ARPT_BASE_CTL,
.set_optmax = ARPT_SO_SET_MAX+1,
.set = do_arpt_set_ctl,
-#ifdef CONFIG_COMPAT
- .compat_set = compat_do_arpt_set_ctl,
-#endif
.get_optmin = ARPT_BASE_CTL,
.get_optmax = ARPT_SO_GET_MAX+1,
.get = do_arpt_get_ctl,
-#ifdef CONFIG_COMPAT
- .compat_get = compat_do_arpt_get_ctl,
-#endif
.owner = THIS_MODULE,
};
diff --git a/net/ipv4/netfilter/ip_tables.c b/net/ipv4/netfilter/ip_tables.c
index 5bf9fa06aee0..f15bc21d7301 100644
--- a/net/ipv4/netfilter/ip_tables.c
+++ b/net/ipv4/netfilter/ip_tables.c
@@ -944,8 +944,7 @@ static int compat_table_info(const struct xt_table_info *info,
}
#endif
-static int get_info(struct net *net, void __user *user,
- const int *len, int compat)
+static int get_info(struct net *net, void __user *user, const int *len)
{
char name[XT_TABLE_MAXNAMELEN];
struct xt_table *t;
@@ -959,7 +958,7 @@ static int get_info(struct net *net, void __user *user,
name[XT_TABLE_MAXNAMELEN-1] = '\0';
#ifdef CONFIG_COMPAT
- if (compat)
+ if (in_compat_syscall())
xt_compat_lock(AF_INET);
#endif
t = xt_request_find_table_lock(net, AF_INET, name);
@@ -969,7 +968,7 @@ static int get_info(struct net *net, void __user *user,
#ifdef CONFIG_COMPAT
struct xt_table_info tmp;
- if (compat) {
+ if (in_compat_syscall()) {
ret = compat_table_info(private, &tmp);
xt_compat_flush_offsets(AF_INET);
private = &tmp;
@@ -995,7 +994,7 @@ static int get_info(struct net *net, void __user *user,
} else
ret = PTR_ERR(t);
#ifdef CONFIG_COMPAT
- if (compat)
+ if (in_compat_syscall())
xt_compat_unlock(AF_INET);
#endif
return ret;
@@ -1103,7 +1102,7 @@ __do_replace(struct net *net, const char *name, unsigned int valid_hooks,
}
static int
-do_replace(struct net *net, const void __user *user, unsigned int len)
+do_replace(struct net *net, sockptr_t arg, unsigned int len)
{
int ret;
struct ipt_replace tmp;
@@ -1111,7 +1110,7 @@ do_replace(struct net *net, const void __user *user, unsigned int len)
void *loc_cpu_entry;
struct ipt_entry *iter;
- if (copy_from_user(&tmp, user, sizeof(tmp)) != 0)
+ if (copy_from_sockptr(&tmp, arg, sizeof(tmp)) != 0)
return -EFAULT;
/* overflow check */
@@ -1127,8 +1126,8 @@ do_replace(struct net *net, const void __user *user, unsigned int len)
return -ENOMEM;
loc_cpu_entry = newinfo->entries;
- if (copy_from_user(loc_cpu_entry, user + sizeof(tmp),
- tmp.size) != 0) {
+ if (copy_from_sockptr_offset(loc_cpu_entry, arg, sizeof(tmp),
+ tmp.size) != 0) {
ret = -EFAULT;
goto free_newinfo;
}
@@ -1152,8 +1151,7 @@ do_replace(struct net *net, const void __user *user, unsigned int len)
}
static int
-do_add_counters(struct net *net, const void __user *user,
- unsigned int len, int compat)
+do_add_counters(struct net *net, sockptr_t arg, unsigned int len)
{
unsigned int i;
struct xt_counters_info tmp;
@@ -1164,7 +1162,7 @@ do_add_counters(struct net *net, const void __user *user,
struct ipt_entry *iter;
unsigned int addend;
- paddc = xt_copy_counters_from_user(user, len, &tmp, compat);
+ paddc = xt_copy_counters(arg, len, &tmp);
if (IS_ERR(paddc))
return PTR_ERR(paddc);
@@ -1486,7 +1484,7 @@ out_unlock:
}
static int
-compat_do_replace(struct net *net, void __user *user, unsigned int len)
+compat_do_replace(struct net *net, sockptr_t arg, unsigned int len)
{
int ret;
struct compat_ipt_replace tmp;
@@ -1494,7 +1492,7 @@ compat_do_replace(struct net *net, void __user *user, unsigned int len)
void *loc_cpu_entry;
struct ipt_entry *iter;
- if (copy_from_user(&tmp, user, sizeof(tmp)) != 0)
+ if (copy_from_sockptr(&tmp, arg, sizeof(tmp)) != 0)
return -EFAULT;
/* overflow check */
@@ -1510,8 +1508,8 @@ compat_do_replace(struct net *net, void __user *user, unsigned int len)
return -ENOMEM;
loc_cpu_entry = newinfo->entries;
- if (copy_from_user(loc_cpu_entry, user + sizeof(tmp),
- tmp.size) != 0) {
+ if (copy_from_sockptr_offset(loc_cpu_entry, arg, sizeof(tmp),
+ tmp.size) != 0) {
ret = -EFAULT;
goto free_newinfo;
}
@@ -1534,31 +1532,6 @@ compat_do_replace(struct net *net, void __user *user, unsigned int len)
return ret;
}
-static int
-compat_do_ipt_set_ctl(struct sock *sk, int cmd, void __user *user,
- unsigned int len)
-{
- int ret;
-
- if (!ns_capable(sock_net(sk)->user_ns, CAP_NET_ADMIN))
- return -EPERM;
-
- switch (cmd) {
- case IPT_SO_SET_REPLACE:
- ret = compat_do_replace(sock_net(sk), user, len);
- break;
-
- case IPT_SO_SET_ADD_COUNTERS:
- ret = do_add_counters(sock_net(sk), user, len, 1);
- break;
-
- default:
- ret = -EINVAL;
- }
-
- return ret;
-}
-
struct compat_ipt_get_entries {
char name[XT_TABLE_MAXNAMELEN];
compat_uint_t size;
@@ -1634,33 +1607,10 @@ compat_get_entries(struct net *net, struct compat_ipt_get_entries __user *uptr,
xt_compat_unlock(AF_INET);
return ret;
}
-
-static int do_ipt_get_ctl(struct sock *, int, void __user *, int *);
-
-static int
-compat_do_ipt_get_ctl(struct sock *sk, int cmd, void __user *user, int *len)
-{
- int ret;
-
- if (!ns_capable(sock_net(sk)->user_ns, CAP_NET_ADMIN))
- return -EPERM;
-
- switch (cmd) {
- case IPT_SO_GET_INFO:
- ret = get_info(sock_net(sk), user, len, 1);
- break;
- case IPT_SO_GET_ENTRIES:
- ret = compat_get_entries(sock_net(sk), user, len);
- break;
- default:
- ret = do_ipt_get_ctl(sk, cmd, user, len);
- }
- return ret;
-}
#endif
static int
-do_ipt_set_ctl(struct sock *sk, int cmd, void __user *user, unsigned int len)
+do_ipt_set_ctl(struct sock *sk, int cmd, sockptr_t arg, unsigned int len)
{
int ret;
@@ -1669,11 +1619,16 @@ do_ipt_set_ctl(struct sock *sk, int cmd, void __user *user, unsigned int len)
switch (cmd) {
case IPT_SO_SET_REPLACE:
- ret = do_replace(sock_net(sk), user, len);
+#ifdef CONFIG_COMPAT
+ if (in_compat_syscall())
+ ret = compat_do_replace(sock_net(sk), arg, len);
+ else
+#endif
+ ret = do_replace(sock_net(sk), arg, len);
break;
case IPT_SO_SET_ADD_COUNTERS:
- ret = do_add_counters(sock_net(sk), user, len, 0);
+ ret = do_add_counters(sock_net(sk), arg, len);
break;
default:
@@ -1693,11 +1648,16 @@ do_ipt_get_ctl(struct sock *sk, int cmd, void __user *user, int *len)
switch (cmd) {
case IPT_SO_GET_INFO:
- ret = get_info(sock_net(sk), user, len, 0);
+ ret = get_info(sock_net(sk), user, len);
break;
case IPT_SO_GET_ENTRIES:
- ret = get_entries(sock_net(sk), user, len);
+#ifdef CONFIG_COMPAT
+ if (in_compat_syscall())
+ ret = compat_get_entries(sock_net(sk), user, len);
+ else
+#endif
+ ret = get_entries(sock_net(sk), user, len);
break;
case IPT_SO_GET_REVISION_MATCH:
@@ -1886,15 +1846,9 @@ static struct nf_sockopt_ops ipt_sockopts = {
.set_optmin = IPT_BASE_CTL,
.set_optmax = IPT_SO_SET_MAX+1,
.set = do_ipt_set_ctl,
-#ifdef CONFIG_COMPAT
- .compat_set = compat_do_ipt_set_ctl,
-#endif
.get_optmin = IPT_BASE_CTL,
.get_optmax = IPT_SO_GET_MAX+1,
.get = do_ipt_get_ctl,
-#ifdef CONFIG_COMPAT
- .compat_get = compat_do_ipt_get_ctl,
-#endif
.owner = THIS_MODULE,
};
diff --git a/net/ipv4/netfilter/ipt_CLUSTERIP.c b/net/ipv4/netfilter/ipt_CLUSTERIP.c
index f8755a4ae9d4..a8b980ad11d4 100644
--- a/net/ipv4/netfilter/ipt_CLUSTERIP.c
+++ b/net/ipv4/netfilter/ipt_CLUSTERIP.c
@@ -3,7 +3,7 @@
* (C) 2003-2004 by Harald Welte <laforge@netfilter.org>
* based on ideas of Fabio Olive Leite <olive@unixforge.org>
*
- * Development of this code funded by SuSE Linux AG, http://www.suse.com/
+ * Development of this code funded by SuSE Linux AG, https://www.suse.com/
*/
#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
#include <linux/module.h>
diff --git a/net/ipv4/netfilter/nf_reject_ipv4.c b/net/ipv4/netfilter/nf_reject_ipv4.c
index 2361fdac2c43..9dcfa4e461b6 100644
--- a/net/ipv4/netfilter/nf_reject_ipv4.c
+++ b/net/ipv4/netfilter/nf_reject_ipv4.c
@@ -96,6 +96,21 @@ void nf_reject_ip_tcphdr_put(struct sk_buff *nskb, const struct sk_buff *oldskb,
}
EXPORT_SYMBOL_GPL(nf_reject_ip_tcphdr_put);
+static int nf_reject_fill_skb_dst(struct sk_buff *skb_in)
+{
+ struct dst_entry *dst = NULL;
+ struct flowi fl;
+
+ memset(&fl, 0, sizeof(struct flowi));
+ fl.u.ip4.daddr = ip_hdr(skb_in)->saddr;
+ nf_ip_route(dev_net(skb_in->dev), &dst, &fl, false);
+ if (!dst)
+ return -1;
+
+ skb_dst_set(skb_in, dst);
+ return 0;
+}
+
/* Send RST reply */
void nf_send_reset(struct net *net, struct sk_buff *oldskb, int hook)
{
@@ -109,6 +124,9 @@ void nf_send_reset(struct net *net, struct sk_buff *oldskb, int hook)
if (!oth)
return;
+ if (hook == NF_INET_PRE_ROUTING && nf_reject_fill_skb_dst(oldskb))
+ return;
+
if (skb_rtable(oldskb)->rt_flags & (RTCF_BROADCAST | RTCF_MULTICAST))
return;
@@ -175,6 +193,9 @@ void nf_send_unreach(struct sk_buff *skb_in, int code, int hook)
if (iph->frag_off & htons(IP_OFFSET))
return;
+ if (hook == NF_INET_PRE_ROUTING && nf_reject_fill_skb_dst(skb_in))
+ return;
+
if (skb_csum_unnecessary(skb_in) || !nf_reject_verify_csum(proto)) {
icmp_send(skb_in, ICMP_DEST_UNREACH, code, 0);
return;
generated by cgit v1.2.3 (git 2.39.0) at 2024-09-04 12:38:41 +0300