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Diffstat (limited to 'net')
-rw-r--r--net/bridge/br_netfilter_hooks.c4
-rw-r--r--net/bridge/netfilter/ebt_among.c21
-rw-r--r--net/bridge/netfilter/ebtables.c40
-rw-r--r--net/ipv4/netfilter/ipt_CLUSTERIP.c15
-rw-r--r--net/ipv4/netfilter/nf_flow_table_ipv4.c1
-rw-r--r--net/ipv6/netfilter.c9
-rw-r--r--net/ipv6/netfilter/ip6t_rpfilter.c4
-rw-r--r--net/ipv6/netfilter/nf_nat_l3proto_ipv6.c4
-rw-r--r--net/ipv6/netfilter/nft_fib_ipv6.c12
-rw-r--r--net/netfilter/ipvs/ip_vs_ftp.c2
-rw-r--r--net/netfilter/nf_tables_api.c25
11 files changed, 98 insertions, 39 deletions
diff --git a/net/bridge/br_netfilter_hooks.c b/net/bridge/br_netfilter_hooks.c
index 27f1d4f2114a..9b16eaf33819 100644
--- a/net/bridge/br_netfilter_hooks.c
+++ b/net/bridge/br_netfilter_hooks.c
@@ -214,7 +214,7 @@ static int br_validate_ipv4(struct net *net, struct sk_buff *skb)
iph = ip_hdr(skb);
if (unlikely(ip_fast_csum((u8 *)iph, iph->ihl)))
- goto inhdr_error;
+ goto csum_error;
len = ntohs(iph->tot_len);
if (skb->len < len) {
@@ -236,6 +236,8 @@ static int br_validate_ipv4(struct net *net, struct sk_buff *skb)
*/
return 0;
+csum_error:
+ __IP_INC_STATS(net, IPSTATS_MIB_CSUMERRORS);
inhdr_error:
__IP_INC_STATS(net, IPSTATS_MIB_INHDRERRORS);
drop:
diff --git a/net/bridge/netfilter/ebt_among.c b/net/bridge/netfilter/ebt_among.c
index ce7152a12bd8..c5afb4232ecb 100644
--- a/net/bridge/netfilter/ebt_among.c
+++ b/net/bridge/netfilter/ebt_among.c
@@ -172,18 +172,35 @@ ebt_among_mt(const struct sk_buff *skb, struct xt_action_param *par)
return true;
}
+static bool poolsize_invalid(const struct ebt_mac_wormhash *w)
+{
+ return w && w->poolsize >= (INT_MAX / sizeof(struct ebt_mac_wormhash_tuple));
+}
+
static int ebt_among_mt_check(const struct xt_mtchk_param *par)
{
const struct ebt_among_info *info = par->matchinfo;
const struct ebt_entry_match *em =
container_of(par->matchinfo, const struct ebt_entry_match, data);
- int expected_length = sizeof(struct ebt_among_info);
+ unsigned int expected_length = sizeof(struct ebt_among_info);
const struct ebt_mac_wormhash *wh_dst, *wh_src;
int err;
+ if (expected_length > em->match_size)
+ return -EINVAL;
+
wh_dst = ebt_among_wh_dst(info);
- wh_src = ebt_among_wh_src(info);
+ if (poolsize_invalid(wh_dst))
+ return -EINVAL;
+
expected_length += ebt_mac_wormhash_size(wh_dst);
+ if (expected_length > em->match_size)
+ return -EINVAL;
+
+ wh_src = ebt_among_wh_src(info);
+ if (poolsize_invalid(wh_src))
+ return -EINVAL;
+
expected_length += ebt_mac_wormhash_size(wh_src);
if (em->match_size != EBT_ALIGN(expected_length)) {
diff --git a/net/bridge/netfilter/ebtables.c b/net/bridge/netfilter/ebtables.c
index 02c4b409d317..254ef9f49567 100644
--- a/net/bridge/netfilter/ebtables.c
+++ b/net/bridge/netfilter/ebtables.c
@@ -1641,7 +1641,8 @@ static int compat_match_to_user(struct ebt_entry_match *m, void __user **dstptr,
int off = ebt_compat_match_offset(match, m->match_size);
compat_uint_t msize = m->match_size - off;
- BUG_ON(off >= m->match_size);
+ if (WARN_ON(off >= m->match_size))
+ return -EINVAL;
if (copy_to_user(cm->u.name, match->name,
strlen(match->name) + 1) || put_user(msize, &cm->match_size))
@@ -1671,7 +1672,8 @@ static int compat_target_to_user(struct ebt_entry_target *t,
int off = xt_compat_target_offset(target);
compat_uint_t tsize = t->target_size - off;
- BUG_ON(off >= t->target_size);
+ if (WARN_ON(off >= t->target_size))
+ return -EINVAL;
if (copy_to_user(cm->u.name, target->name,
strlen(target->name) + 1) || put_user(tsize, &cm->match_size))
@@ -1902,7 +1904,8 @@ static int ebt_buf_add(struct ebt_entries_buf_state *state,
if (state->buf_kern_start == NULL)
goto count_only;
- BUG_ON(state->buf_kern_offset + sz > state->buf_kern_len);
+ if (WARN_ON(state->buf_kern_offset + sz > state->buf_kern_len))
+ return -EINVAL;
memcpy(state->buf_kern_start + state->buf_kern_offset, data, sz);
@@ -1915,7 +1918,8 @@ static int ebt_buf_add_pad(struct ebt_entries_buf_state *state, unsigned int sz)
{
char *b = state->buf_kern_start;
- BUG_ON(b && state->buf_kern_offset > state->buf_kern_len);
+ if (WARN_ON(b && state->buf_kern_offset > state->buf_kern_len))
+ return -EINVAL;
if (b != NULL && sz > 0)
memset(b + state->buf_kern_offset, 0, sz);
@@ -1992,8 +1996,10 @@ static int compat_mtw_from_user(struct compat_ebt_entry_mwt *mwt,
pad = XT_ALIGN(size_kern) - size_kern;
if (pad > 0 && dst) {
- BUG_ON(state->buf_kern_len <= pad);
- BUG_ON(state->buf_kern_offset - (match_size + off) + size_kern > state->buf_kern_len - pad);
+ if (WARN_ON(state->buf_kern_len <= pad))
+ return -EINVAL;
+ if (WARN_ON(state->buf_kern_offset - (match_size + off) + size_kern > state->buf_kern_len - pad))
+ return -EINVAL;
memset(dst + size_kern, 0, pad);
}
return off + match_size;
@@ -2043,7 +2049,8 @@ static int ebt_size_mwt(struct compat_ebt_entry_mwt *match32,
if (ret < 0)
return ret;
- BUG_ON(ret < match32->match_size);
+ if (WARN_ON(ret < match32->match_size))
+ return -EINVAL;
growth += ret - match32->match_size;
growth += ebt_compat_entry_padsize();
@@ -2053,7 +2060,9 @@ static int ebt_size_mwt(struct compat_ebt_entry_mwt *match32,
if (match_kern)
match_kern->match_size = ret;
- WARN_ON(type == EBT_COMPAT_TARGET && size_left);
+ if (WARN_ON(type == EBT_COMPAT_TARGET && size_left))
+ return -EINVAL;
+
match32 = (struct compat_ebt_entry_mwt *) buf;
}
@@ -2109,6 +2118,15 @@ static int size_entry_mwt(struct ebt_entry *entry, const unsigned char *base,
*
* offsets are relative to beginning of struct ebt_entry (i.e., 0).
*/
+ for (i = 0; i < 4 ; ++i) {
+ if (offsets[i] >= *total)
+ return -EINVAL;
+ if (i == 0)
+ continue;
+ if (offsets[i-1] > offsets[i])
+ return -EINVAL;
+ }
+
for (i = 0, j = 1 ; j < 4 ; j++, i++) {
struct compat_ebt_entry_mwt *match32;
unsigned int size;
@@ -2140,7 +2158,8 @@ static int size_entry_mwt(struct ebt_entry *entry, const unsigned char *base,
startoff = state->buf_user_offset - startoff;
- BUG_ON(*total < startoff);
+ if (WARN_ON(*total < startoff))
+ return -EINVAL;
*total -= startoff;
return 0;
}
@@ -2267,7 +2286,8 @@ static int compat_do_replace(struct net *net, void __user *user,
state.buf_kern_len = size64;
ret = compat_copy_entries(entries_tmp, tmp.entries_size, &state);
- BUG_ON(ret < 0); /* parses same data again */
+ if (WARN_ON(ret < 0))
+ goto out_unlock;
vfree(entries_tmp);
tmp.entries_size = size64;
diff --git a/net/ipv4/netfilter/ipt_CLUSTERIP.c b/net/ipv4/netfilter/ipt_CLUSTERIP.c
index 4b02ab39ebc5..8a8ae61cea71 100644
--- a/net/ipv4/netfilter/ipt_CLUSTERIP.c
+++ b/net/ipv4/netfilter/ipt_CLUSTERIP.c
@@ -232,7 +232,6 @@ clusterip_config_init(struct net *net, const struct ipt_clusterip_tgt_info *i,
c->hash_mode = i->hash_mode;
c->hash_initval = i->hash_initval;
refcount_set(&c->refcount, 1);
- refcount_set(&c->entries, 1);
spin_lock_bh(&cn->lock);
if (__clusterip_config_find(net, ip)) {
@@ -263,8 +262,10 @@ clusterip_config_init(struct net *net, const struct ipt_clusterip_tgt_info *i,
c->notifier.notifier_call = clusterip_netdev_event;
err = register_netdevice_notifier(&c->notifier);
- if (!err)
+ if (!err) {
+ refcount_set(&c->entries, 1);
return c;
+ }
#ifdef CONFIG_PROC_FS
proc_remove(c->pde);
@@ -273,7 +274,7 @@ err:
spin_lock_bh(&cn->lock);
list_del_rcu(&c->list);
spin_unlock_bh(&cn->lock);
- kfree(c);
+ clusterip_config_put(c);
return ERR_PTR(err);
}
@@ -496,12 +497,15 @@ static int clusterip_tg_check(const struct xt_tgchk_param *par)
return PTR_ERR(config);
}
}
- cipinfo->config = config;
ret = nf_ct_netns_get(par->net, par->family);
- if (ret < 0)
+ if (ret < 0) {
pr_info("cannot load conntrack support for proto=%u\n",
par->family);
+ clusterip_config_entry_put(par->net, config);
+ clusterip_config_put(config);
+ return ret;
+ }
if (!par->net->xt.clusterip_deprecated_warning) {
pr_info("ipt_CLUSTERIP is deprecated and it will removed soon, "
@@ -509,6 +513,7 @@ static int clusterip_tg_check(const struct xt_tgchk_param *par)
par->net->xt.clusterip_deprecated_warning = true;
}
+ cipinfo->config = config;
return ret;
}
diff --git a/net/ipv4/netfilter/nf_flow_table_ipv4.c b/net/ipv4/netfilter/nf_flow_table_ipv4.c
index 25d2975da156..282b9cc4fe82 100644
--- a/net/ipv4/netfilter/nf_flow_table_ipv4.c
+++ b/net/ipv4/netfilter/nf_flow_table_ipv4.c
@@ -111,6 +111,7 @@ static int nf_flow_dnat_ip(const struct flow_offload *flow, struct sk_buff *skb,
default:
return -1;
}
+ csum_replace4(&iph->check, addr, new_addr);
return nf_flow_nat_ip_l4proto(skb, iph, thoff, addr, new_addr);
}
diff --git a/net/ipv6/netfilter.c b/net/ipv6/netfilter.c
index d95ceca7ff8f..531d6957af36 100644
--- a/net/ipv6/netfilter.c
+++ b/net/ipv6/netfilter.c
@@ -21,18 +21,19 @@
int ip6_route_me_harder(struct net *net, struct sk_buff *skb)
{
const struct ipv6hdr *iph = ipv6_hdr(skb);
+ struct sock *sk = sk_to_full_sk(skb->sk);
unsigned int hh_len;
struct dst_entry *dst;
struct flowi6 fl6 = {
- .flowi6_oif = skb->sk ? skb->sk->sk_bound_dev_if : 0,
+ .flowi6_oif = sk ? sk->sk_bound_dev_if : 0,
.flowi6_mark = skb->mark,
- .flowi6_uid = sock_net_uid(net, skb->sk),
+ .flowi6_uid = sock_net_uid(net, sk),
.daddr = iph->daddr,
.saddr = iph->saddr,
};
int err;
- dst = ip6_route_output(net, skb->sk, &fl6);
+ dst = ip6_route_output(net, sk, &fl6);
err = dst->error;
if (err) {
IP6_INC_STATS(net, ip6_dst_idev(dst), IPSTATS_MIB_OUTNOROUTES);
@@ -50,7 +51,7 @@ int ip6_route_me_harder(struct net *net, struct sk_buff *skb)
if (!(IP6CB(skb)->flags & IP6SKB_XFRM_TRANSFORMED) &&
xfrm_decode_session(skb, flowi6_to_flowi(&fl6), AF_INET6) == 0) {
skb_dst_set(skb, NULL);
- dst = xfrm_lookup(net, dst, flowi6_to_flowi(&fl6), skb->sk, 0);
+ dst = xfrm_lookup(net, dst, flowi6_to_flowi(&fl6), sk, 0);
if (IS_ERR(dst))
return PTR_ERR(dst);
skb_dst_set(skb, dst);
diff --git a/net/ipv6/netfilter/ip6t_rpfilter.c b/net/ipv6/netfilter/ip6t_rpfilter.c
index 94deb69bbbda..91ed25a24b79 100644
--- a/net/ipv6/netfilter/ip6t_rpfilter.c
+++ b/net/ipv6/netfilter/ip6t_rpfilter.c
@@ -48,10 +48,6 @@ static bool rpfilter_lookup_reverse6(struct net *net, const struct sk_buff *skb,
}
fl6.flowi6_mark = flags & XT_RPFILTER_VALID_MARK ? skb->mark : 0;
- if ((flags & XT_RPFILTER_LOOSE) == 0) {
- fl6.flowi6_oif = dev->ifindex;
- lookup_flags |= RT6_LOOKUP_F_IFACE;
- }
rt = (void *) ip6_route_lookup(net, &fl6, lookup_flags);
if (rt->dst.error)
diff --git a/net/ipv6/netfilter/nf_nat_l3proto_ipv6.c b/net/ipv6/netfilter/nf_nat_l3proto_ipv6.c
index bed57ee65f7b..6b7f075f811f 100644
--- a/net/ipv6/netfilter/nf_nat_l3proto_ipv6.c
+++ b/net/ipv6/netfilter/nf_nat_l3proto_ipv6.c
@@ -99,6 +99,10 @@ static bool nf_nat_ipv6_manip_pkt(struct sk_buff *skb,
!l4proto->manip_pkt(skb, &nf_nat_l3proto_ipv6, iphdroff, hdroff,
target, maniptype))
return false;
+
+ /* must reload, offset might have changed */
+ ipv6h = (void *)skb->data + iphdroff;
+
manip_addr:
if (maniptype == NF_NAT_MANIP_SRC)
ipv6h->saddr = target->src.u3.in6;
diff --git a/net/ipv6/netfilter/nft_fib_ipv6.c b/net/ipv6/netfilter/nft_fib_ipv6.c
index cc5174c7254c..62fc84d7bdff 100644
--- a/net/ipv6/netfilter/nft_fib_ipv6.c
+++ b/net/ipv6/netfilter/nft_fib_ipv6.c
@@ -180,7 +180,6 @@ void nft_fib6_eval(const struct nft_expr *expr, struct nft_regs *regs,
}
*dest = 0;
- again:
rt = (void *)ip6_route_lookup(nft_net(pkt), &fl6, lookup_flags);
if (rt->dst.error)
goto put_rt_err;
@@ -189,15 +188,8 @@ void nft_fib6_eval(const struct nft_expr *expr, struct nft_regs *regs,
if (rt->rt6i_flags & (RTF_REJECT | RTF_ANYCAST | RTF_LOCAL))
goto put_rt_err;
- if (oif && oif != rt->rt6i_idev->dev) {
- /* multipath route? Try again with F_IFACE */
- if ((lookup_flags & RT6_LOOKUP_F_IFACE) == 0) {
- lookup_flags |= RT6_LOOKUP_F_IFACE;
- fl6.flowi6_oif = oif->ifindex;
- ip6_rt_put(rt);
- goto again;
- }
- }
+ if (oif && oif != rt->rt6i_idev->dev)
+ goto put_rt_err;
switch (priv->result) {
case NFT_FIB_RESULT_OIF:
diff --git a/net/netfilter/ipvs/ip_vs_ftp.c b/net/netfilter/ipvs/ip_vs_ftp.c
index 3e17d32b629d..58d5d05aec24 100644
--- a/net/netfilter/ipvs/ip_vs_ftp.c
+++ b/net/netfilter/ipvs/ip_vs_ftp.c
@@ -260,7 +260,7 @@ static int ip_vs_ftp_out(struct ip_vs_app *app, struct ip_vs_conn *cp,
buf_len = strlen(buf);
ct = nf_ct_get(skb, &ctinfo);
- if (ct && (ct->status & IPS_NAT_MASK)) {
+ if (ct) {
bool mangled;
/* If mangling fails this function will return 0
diff --git a/net/netfilter/nf_tables_api.c b/net/netfilter/nf_tables_api.c
index 8b9fe30de0cd..558593e6a0a3 100644
--- a/net/netfilter/nf_tables_api.c
+++ b/net/netfilter/nf_tables_api.c
@@ -5037,9 +5037,9 @@ static int nf_tables_newflowtable(struct net *net, struct sock *nlsk,
{
const struct nfgenmsg *nfmsg = nlmsg_data(nlh);
const struct nf_flowtable_type *type;
+ struct nft_flowtable *flowtable, *ft;
u8 genmask = nft_genmask_next(net);
int family = nfmsg->nfgen_family;
- struct nft_flowtable *flowtable;
struct nft_table *table;
struct nft_ctx ctx;
int err, i, k;
@@ -5099,6 +5099,22 @@ static int nf_tables_newflowtable(struct net *net, struct sock *nlsk,
goto err3;
for (i = 0; i < flowtable->ops_len; i++) {
+ if (!flowtable->ops[i].dev)
+ continue;
+
+ list_for_each_entry(ft, &table->flowtables, list) {
+ for (k = 0; k < ft->ops_len; k++) {
+ if (!ft->ops[k].dev)
+ continue;
+
+ if (flowtable->ops[i].dev == ft->ops[k].dev &&
+ flowtable->ops[i].pf == ft->ops[k].pf) {
+ err = -EBUSY;
+ goto err4;
+ }
+ }
+ }
+
err = nf_register_net_hook(net, &flowtable->ops[i]);
if (err < 0)
goto err4;
@@ -5120,7 +5136,7 @@ err5:
i = flowtable->ops_len;
err4:
for (k = i - 1; k >= 0; k--)
- nf_unregister_net_hook(net, &flowtable->ops[i]);
+ nf_unregister_net_hook(net, &flowtable->ops[k]);
kfree(flowtable->ops);
err3:
@@ -5145,6 +5161,11 @@ static int nf_tables_delflowtable(struct net *net, struct sock *nlsk,
struct nft_table *table;
struct nft_ctx ctx;
+ if (!nla[NFTA_FLOWTABLE_TABLE] ||
+ (!nla[NFTA_FLOWTABLE_NAME] &&
+ !nla[NFTA_FLOWTABLE_HANDLE]))
+ return -EINVAL;
+
table = nf_tables_table_lookup(net, nla[NFTA_FLOWTABLE_TABLE],
family, genmask);
if (IS_ERR(table))
generated by cgit v1.2.3 (git 2.39.0) at 2024-10-13 10:02:58 +0300