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

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Pablo Neira Ayuso says:

====================
Netfilter/IPVS fixes for net

The following patchset contains updates for your net tree, they are:

1) Fix removal of destination in IPVS when the new mixed family support
   is used, from Alexey Andriyanov via Simon Horman.

2) Fix module refcount undeflow in nft_compat when reusing a match /
   target.

3) Fix iptables-restore when the recent match is used with a new hitcount
   that exceeds threshold, from Florian Westphal.

4) Fix stack corruption in xt_socket due to using stack storage to save
   the inner IPv6 header, from Eric Dumazet.

I'll follow up soon with another batch with more fixes that are still
cooking.
====================

Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
David S. Miller 2015-02-20 17:36:20 -05:00
commit ee92259849
4 changed files with 28 additions and 18 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

2
net/netfilter/ipvs/ip_vs_ctl.c
View file

@ -3402,7 +3402,7 @@ static int ip_vs_genl_set_cmd(struct sk_buff *skb, struct genl_info *info)
if (udest.af == 0)
udest.af = svc->af;
if (udest.af != svc->af) {
if (udest.af != svc->af && cmd != IPVS_CMD_DEL_DEST) {
/* The synchronization protocol is incompatible
* with mixed family services
*/

12
net/netfilter/nft_compat.c
View file

@ -625,8 +625,12 @@ nft_match_select_ops(const struct nft_ctx *ctx,
struct xt_match *match = nft_match->ops.data;
if (strcmp(match->name, mt_name) == 0 &&
match->revision == rev && match->family == family)
match->revision == rev && match->family == family) {
if (!try_module_get(match->me))
return ERR_PTR(-ENOENT);
return &nft_match->ops;
}
}
match = xt_request_find_match(family, mt_name, rev);
@ -695,8 +699,12 @@ nft_target_select_ops(const struct nft_ctx *ctx,
struct xt_target *target = nft_target->ops.data;
if (strcmp(target->name, tg_name) == 0 &&
target->revision == rev && target->family == family)
target->revision == rev && target->family == family) {
if (!try_module_get(target->me))
return ERR_PTR(-ENOENT);
return &nft_target->ops;
}
}
target = xt_request_find_target(family, tg_name, rev);

11
net/netfilter/xt_recent.c
View file

@ -378,12 +378,11 @@ static int recent_mt_check(const struct xt_mtchk_param *par,
mutex_lock(&recent_mutex);
t = recent_table_lookup(recent_net, info->name);
if (t != NULL) {
if (info->hit_count > t->nstamps_max_mask) {
pr_info("hitcount (%u) is larger than packets to be remembered (%u) for table %s\n",
info->hit_count, t->nstamps_max_mask + 1,
info->name);
ret = -EINVAL;
goto out;
if (nstamp_mask > t->nstamps_max_mask) {
spin_lock_bh(&recent_lock);
recent_table_flush(t);
t->nstamps_max_mask = nstamp_mask;
spin_unlock_bh(&recent_lock);
}
t->refcnt++;

21
net/netfilter/xt_socket.c
View file

@ -243,12 +243,13 @@ static int
extract_icmp6_fields(const struct sk_buff *skb,
unsigned int outside_hdrlen,
int *protocol,
struct in6_addr **raddr,
struct in6_addr **laddr,
const struct in6_addr **raddr,
const struct in6_addr **laddr,
__be16 *rport,
__be16 *lport)
__be16 *lport,
struct ipv6hdr *ipv6_var)
{
struct ipv6hdr *inside_iph, _inside_iph;
const struct ipv6hdr *inside_iph;
struct icmp6hdr *icmph, _icmph;
__be16 *ports, _ports[2];
u8 inside_nexthdr;
@ -263,12 +264,14 @@ extract_icmp6_fields(const struct sk_buff *skb,
if (icmph->icmp6_type & ICMPV6_INFOMSG_MASK)
return 1;
inside_iph = skb_header_pointer(skb, outside_hdrlen + sizeof(_icmph), sizeof(_inside_iph), &_inside_iph);
inside_iph = skb_header_pointer(skb, outside_hdrlen + sizeof(_icmph),
sizeof(*ipv6_var), ipv6_var);
if (inside_iph == NULL)
return 1;
inside_nexthdr = inside_iph->nexthdr;
inside_hdrlen = ipv6_skip_exthdr(skb, outside_hdrlen + sizeof(_icmph) + sizeof(_inside_iph),
inside_hdrlen = ipv6_skip_exthdr(skb, outside_hdrlen + sizeof(_icmph) +
sizeof(*ipv6_var),
&inside_nexthdr, &inside_fragoff);
if (inside_hdrlen < 0)
return 1; /* hjm: Packet has no/incomplete transport layer headers. */
@ -315,10 +318,10 @@ xt_socket_get_sock_v6(struct net *net, const u8 protocol,
static bool
socket_mt6_v1_v2(const struct sk_buff *skb, struct xt_action_param *par)
{
struct ipv6hdr *iph = ipv6_hdr(skb);
struct ipv6hdr ipv6_var, *iph = ipv6_hdr(skb);
struct udphdr _hdr, *hp = NULL;
struct sock *sk = skb->sk;
struct in6_addr *daddr = NULL, *saddr = NULL;
const struct in6_addr *daddr = NULL, *saddr = NULL;
__be16 uninitialized_var(dport), uninitialized_var(sport);
int thoff = 0, uninitialized_var(tproto);
const struct xt_socket_mtinfo1 *info = (struct xt_socket_mtinfo1 *) par->matchinfo;
@ -342,7 +345,7 @@ socket_mt6_v1_v2(const struct sk_buff *skb, struct xt_action_param *par)
} else if (tproto == IPPROTO_ICMPV6) {
if (extract_icmp6_fields(skb, thoff, &tproto, &saddr, &daddr,
&sport, &dport))
&sport, &dport, &ipv6_var))
return false;
} else {
return false;