diff options
Diffstat (limited to 'net/ipv4/netfilter')
-rw-r--r-- | net/ipv4/netfilter/arp_tables.c | 105 | ||||
-rw-r--r-- | net/ipv4/netfilter/ip_tables.c | 104 | ||||
-rw-r--r-- | net/ipv4/netfilter/ipt_CLUSTERIP.c | 2 | ||||
-rw-r--r-- | net/ipv4/netfilter/nf_reject_ipv4.c | 21 |
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; |