Merge branch 'master' of git://git.kernel.org/pub/scm/linux/kernel/git/pablo/nf
Pablo Neira Ayuso says:
====================
Netfilter fixes for net
The following patchset contains Netfilter fixes for your net tree,
they are:
* Fix nf_trace in nftables if XT_TRACE=n, from Florian Westphal.
* Don't use the fast payload operation in nf_tables if the length is
not power of 2 or it is not aligned, from Nikolay Aleksandrov.
* Fix missing break statement the inet flavour of nft_reject, which
results in evaluating IPv4 packets with the IPv6 evaluation routine,
from Patrick McHardy.
* Fix wrong kconfig symbol in nft_meta to match the routing realm,
from Paul Bolle.
* Allocate the NAT null binding when creating new conntracks via
ctnetlink to avoid that several packets race at initializing the
the conntrack NAT extension, original patch from Florian Westphal,
revisited version from me.
* Fix DNAT handling in the snmp NAT helper, the same handling was being
done for SNAT and DNAT and 2.4 already contains that fix, from
Francois-Xavier Le Bail.
====================
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/include/linux/skbuff.h b/include/linux/skbuff.h
index 3ebbbe7..5e1e6f2 100644
--- a/include/linux/skbuff.h
+++ b/include/linux/skbuff.h
@@ -2725,7 +2725,7 @@
static inline void nf_reset_trace(struct sk_buff *skb)
{
-#if IS_ENABLED(CONFIG_NETFILTER_XT_TARGET_TRACE)
+#if IS_ENABLED(CONFIG_NETFILTER_XT_TARGET_TRACE) || defined(CONFIG_NF_TABLES)
skb->nf_trace = 0;
#endif
}
@@ -2742,6 +2742,9 @@
dst->nf_bridge = src->nf_bridge;
nf_bridge_get(src->nf_bridge);
#endif
+#if IS_ENABLED(CONFIG_NETFILTER_XT_TARGET_TRACE) || defined(CONFIG_NF_TABLES)
+ dst->nf_trace = src->nf_trace;
+#endif
}
static inline void nf_copy(struct sk_buff *dst, const struct sk_buff *src)
diff --git a/net/core/skbuff.c b/net/core/skbuff.c
index 5976ef0..5d6236d 100644
--- a/net/core/skbuff.c
+++ b/net/core/skbuff.c
@@ -707,9 +707,6 @@
new->mark = old->mark;
new->skb_iif = old->skb_iif;
__nf_copy(new, old);
-#if IS_ENABLED(CONFIG_NETFILTER_XT_TARGET_TRACE)
- new->nf_trace = old->nf_trace;
-#endif
#ifdef CONFIG_NET_SCHED
new->tc_index = old->tc_index;
#ifdef CONFIG_NET_CLS_ACT
diff --git a/net/ipv4/ip_output.c b/net/ipv4/ip_output.c
index 8971780..73c6b63 100644
--- a/net/ipv4/ip_output.c
+++ b/net/ipv4/ip_output.c
@@ -422,9 +422,6 @@
to->tc_index = from->tc_index;
#endif
nf_copy(to, from);
-#if IS_ENABLED(CONFIG_NETFILTER_XT_TARGET_TRACE)
- to->nf_trace = from->nf_trace;
-#endif
#if defined(CONFIG_IP_VS) || defined(CONFIG_IP_VS_MODULE)
to->ipvs_property = from->ipvs_property;
#endif
diff --git a/net/ipv4/netfilter/nf_nat_snmp_basic.c b/net/ipv4/netfilter/nf_nat_snmp_basic.c
index d551e31..7c67667 100644
--- a/net/ipv4/netfilter/nf_nat_snmp_basic.c
+++ b/net/ipv4/netfilter/nf_nat_snmp_basic.c
@@ -1198,8 +1198,8 @@
map.to = NOCT1(&ct->tuplehash[!dir].tuple.dst.u3.ip);
} else {
/* DNAT replies */
- map.from = NOCT1(&ct->tuplehash[dir].tuple.src.u3.ip);
- map.to = NOCT1(&ct->tuplehash[!dir].tuple.dst.u3.ip);
+ map.from = NOCT1(&ct->tuplehash[!dir].tuple.src.u3.ip);
+ map.to = NOCT1(&ct->tuplehash[dir].tuple.dst.u3.ip);
}
if (map.from == map.to)
diff --git a/net/ipv6/ip6_output.c b/net/ipv6/ip6_output.c
index 070a2fa..16f91a2 100644
--- a/net/ipv6/ip6_output.c
+++ b/net/ipv6/ip6_output.c
@@ -530,9 +530,6 @@
to->tc_index = from->tc_index;
#endif
nf_copy(to, from);
-#if IS_ENABLED(CONFIG_NETFILTER_XT_TARGET_TRACE)
- to->nf_trace = from->nf_trace;
-#endif
skb_copy_secmark(to, from);
}
diff --git a/net/netfilter/nf_conntrack_netlink.c b/net/netfilter/nf_conntrack_netlink.c
index bb322d0..b9f0e03 100644
--- a/net/netfilter/nf_conntrack_netlink.c
+++ b/net/netfilter/nf_conntrack_netlink.c
@@ -1310,27 +1310,22 @@
}
static int
-ctnetlink_change_nat(struct nf_conn *ct, const struct nlattr * const cda[])
+ctnetlink_setup_nat(struct nf_conn *ct, const struct nlattr * const cda[])
{
#ifdef CONFIG_NF_NAT_NEEDED
int ret;
- if (cda[CTA_NAT_DST]) {
- ret = ctnetlink_parse_nat_setup(ct,
- NF_NAT_MANIP_DST,
- cda[CTA_NAT_DST]);
- if (ret < 0)
- return ret;
- }
- if (cda[CTA_NAT_SRC]) {
- ret = ctnetlink_parse_nat_setup(ct,
- NF_NAT_MANIP_SRC,
- cda[CTA_NAT_SRC]);
- if (ret < 0)
- return ret;
- }
- return 0;
+ ret = ctnetlink_parse_nat_setup(ct, NF_NAT_MANIP_DST,
+ cda[CTA_NAT_DST]);
+ if (ret < 0)
+ return ret;
+
+ ret = ctnetlink_parse_nat_setup(ct, NF_NAT_MANIP_SRC,
+ cda[CTA_NAT_SRC]);
+ return ret;
#else
+ if (!cda[CTA_NAT_DST] && !cda[CTA_NAT_SRC])
+ return 0;
return -EOPNOTSUPP;
#endif
}
@@ -1659,11 +1654,9 @@
goto err2;
}
- if (cda[CTA_NAT_SRC] || cda[CTA_NAT_DST]) {
- err = ctnetlink_change_nat(ct, cda);
- if (err < 0)
- goto err2;
- }
+ err = ctnetlink_setup_nat(ct, cda);
+ if (err < 0)
+ goto err2;
nf_ct_acct_ext_add(ct, GFP_ATOMIC);
nf_ct_tstamp_ext_add(ct, GFP_ATOMIC);
diff --git a/net/netfilter/nf_nat_core.c b/net/netfilter/nf_nat_core.c
index d3f5cd6..52ca952 100644
--- a/net/netfilter/nf_nat_core.c
+++ b/net/netfilter/nf_nat_core.c
@@ -432,15 +432,15 @@
}
EXPORT_SYMBOL(nf_nat_setup_info);
-unsigned int
-nf_nat_alloc_null_binding(struct nf_conn *ct, unsigned int hooknum)
+static unsigned int
+__nf_nat_alloc_null_binding(struct nf_conn *ct, enum nf_nat_manip_type manip)
{
/* Force range to this IP; let proto decide mapping for
* per-proto parts (hence not IP_NAT_RANGE_PROTO_SPECIFIED).
* Use reply in case it's already been mangled (eg local packet).
*/
union nf_inet_addr ip =
- (HOOK2MANIP(hooknum) == NF_NAT_MANIP_SRC ?
+ (manip == NF_NAT_MANIP_SRC ?
ct->tuplehash[IP_CT_DIR_REPLY].tuple.dst.u3 :
ct->tuplehash[IP_CT_DIR_REPLY].tuple.src.u3);
struct nf_nat_range range = {
@@ -448,7 +448,13 @@
.min_addr = ip,
.max_addr = ip,
};
- return nf_nat_setup_info(ct, &range, HOOK2MANIP(hooknum));
+ return nf_nat_setup_info(ct, &range, manip);
+}
+
+unsigned int
+nf_nat_alloc_null_binding(struct nf_conn *ct, unsigned int hooknum)
+{
+ return __nf_nat_alloc_null_binding(ct, HOOK2MANIP(hooknum));
}
EXPORT_SYMBOL_GPL(nf_nat_alloc_null_binding);
@@ -702,9 +708,9 @@
static int
nfnetlink_parse_nat(const struct nlattr *nat,
- const struct nf_conn *ct, struct nf_nat_range *range)
+ const struct nf_conn *ct, struct nf_nat_range *range,
+ const struct nf_nat_l3proto *l3proto)
{
- const struct nf_nat_l3proto *l3proto;
struct nlattr *tb[CTA_NAT_MAX+1];
int err;
@@ -714,38 +720,46 @@
if (err < 0)
return err;
- rcu_read_lock();
- l3proto = __nf_nat_l3proto_find(nf_ct_l3num(ct));
- if (l3proto == NULL) {
- err = -EAGAIN;
- goto out;
- }
err = l3proto->nlattr_to_range(tb, range);
if (err < 0)
- goto out;
+ return err;
if (!tb[CTA_NAT_PROTO])
- goto out;
+ return 0;
- err = nfnetlink_parse_nat_proto(tb[CTA_NAT_PROTO], ct, range);
-out:
- rcu_read_unlock();
- return err;
+ return nfnetlink_parse_nat_proto(tb[CTA_NAT_PROTO], ct, range);
}
+/* This function is called under rcu_read_lock() */
static int
nfnetlink_parse_nat_setup(struct nf_conn *ct,
enum nf_nat_manip_type manip,
const struct nlattr *attr)
{
struct nf_nat_range range;
+ const struct nf_nat_l3proto *l3proto;
int err;
- err = nfnetlink_parse_nat(attr, ct, &range);
+ /* Should not happen, restricted to creating new conntracks
+ * via ctnetlink.
+ */
+ if (WARN_ON_ONCE(nf_nat_initialized(ct, manip)))
+ return -EEXIST;
+
+ /* Make sure that L3 NAT is there by when we call nf_nat_setup_info to
+ * attach the null binding, otherwise this may oops.
+ */
+ l3proto = __nf_nat_l3proto_find(nf_ct_l3num(ct));
+ if (l3proto == NULL)
+ return -EAGAIN;
+
+ /* No NAT information has been passed, allocate the null-binding */
+ if (attr == NULL)
+ return __nf_nat_alloc_null_binding(ct, manip);
+
+ err = nfnetlink_parse_nat(attr, ct, &range, l3proto);
if (err < 0)
return err;
- if (nf_nat_initialized(ct, manip))
- return -EEXIST;
return nf_nat_setup_info(ct, &range, manip);
}
diff --git a/net/netfilter/nft_meta.c b/net/netfilter/nft_meta.c
index e8254ad..425cf39 100644
--- a/net/netfilter/nft_meta.c
+++ b/net/netfilter/nft_meta.c
@@ -116,7 +116,7 @@
skb->sk->sk_socket->file->f_cred->fsgid);
read_unlock_bh(&skb->sk->sk_callback_lock);
break;
-#ifdef CONFIG_NET_CLS_ROUTE
+#ifdef CONFIG_IP_ROUTE_CLASSID
case NFT_META_RTCLASSID: {
const struct dst_entry *dst = skb_dst(skb);
@@ -199,7 +199,7 @@
case NFT_META_OIFTYPE:
case NFT_META_SKUID:
case NFT_META_SKGID:
-#ifdef CONFIG_NET_CLS_ROUTE
+#ifdef CONFIG_IP_ROUTE_CLASSID
case NFT_META_RTCLASSID:
#endif
#ifdef CONFIG_NETWORK_SECMARK
diff --git a/net/netfilter/nft_payload.c b/net/netfilter/nft_payload.c
index a2aeb31..85daa84 100644
--- a/net/netfilter/nft_payload.c
+++ b/net/netfilter/nft_payload.c
@@ -135,7 +135,8 @@
if (len == 0 || len > FIELD_SIZEOF(struct nft_data, data))
return ERR_PTR(-EINVAL);
- if (len <= 4 && IS_ALIGNED(offset, len) && base != NFT_PAYLOAD_LL_HEADER)
+ if (len <= 4 && is_power_of_2(len) && IS_ALIGNED(offset, len) &&
+ base != NFT_PAYLOAD_LL_HEADER)
return &nft_payload_fast_ops;
else
return &nft_payload_ops;
diff --git a/net/netfilter/nft_reject_inet.c b/net/netfilter/nft_reject_inet.c
index 8a310f2..b718a52 100644
--- a/net/netfilter/nft_reject_inet.c
+++ b/net/netfilter/nft_reject_inet.c
@@ -21,9 +21,9 @@
{
switch (pkt->ops->pf) {
case NFPROTO_IPV4:
- nft_reject_ipv4_eval(expr, data, pkt);
+ return nft_reject_ipv4_eval(expr, data, pkt);
case NFPROTO_IPV6:
- nft_reject_ipv6_eval(expr, data, pkt);
+ return nft_reject_ipv6_eval(expr, data, pkt);
}
}