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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 fixes for net

The following patchset contains Netfilter fixes for you net tree,
specifically for nf_tables and nfnetlink_queue, they are:

1) Avoid a compilation warning in nfnetlink_queue that was introduced
   in the previous merge window with the simplification of the conntrack
   integration, from Arnd Bergmann.

2) nfnetlink_queue is leaking the pernet subsystem registration from
   a failure path, patch from Nikolay Borisov.

3) Pass down netns pointer to batch callback in nfnetlink, this is the
   largest patch and it is not a bugfix but it is a dependency to
   resolve a splat in the correct way.

4) Fix a splat due to incorrect socket memory accounting with nfnetlink
   skbuff clones.

5) Add missing conntrack dependencies to NFT_DUP_IPV4 and NFT_DUP_IPV6.

6) Traverse the nftables commit list in reverse order from the commit
   path, otherwise we crash when the user applies an incremental update
   via 'nft -f' that deletes an object that was just introduced in this
   batch, from Xin Long.

Regarding the compilation warning fix, many people have sent us (and
keep sending us) patches to address this, that's why I'm including this
batch even if this is not critical.
====================

Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
David S. Miller 2015-12-14 11:09:01 -05:00
commit 9e5be5bd43
6 changed files with 57 additions and 59 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

2
include/linux/netfilter/nfnetlink.h
View file

@ -14,7 +14,7 @@ struct nfnl_callback {
int (*call_rcu)(struct sock *nl, struct sk_buff *skb,
const struct nlmsghdr *nlh,
const struct nlattr * const cda[]);
int (*call_batch)(struct sock *nl, struct sk_buff *skb,
int (*call_batch)(struct net *net, struct sock *nl, struct sk_buff *skb,
const struct nlmsghdr *nlh,
const struct nlattr * const cda[]);
const struct nla_policy *policy; /* netlink attribute policy */

1
net/ipv4/netfilter/Kconfig
View file

@ -60,6 +60,7 @@ config NFT_REJECT_IPV4
config NFT_DUP_IPV4
tristate "IPv4 nf_tables packet duplication support"
depends on !NF_CONNTRACK || NF_CONNTRACK
select NF_DUP_IPV4
help
This module enables IPv4 packet duplication support for nf_tables.

1
net/ipv6/netfilter/Kconfig
View file

@ -49,6 +49,7 @@ config NFT_REJECT_IPV6
config NFT_DUP_IPV6
tristate "IPv6 nf_tables packet duplication support"
depends on !NF_CONNTRACK || NF_CONNTRACK
select NF_DUP_IPV6
help
This module enables IPv6 packet duplication support for nf_tables.

99
net/netfilter/nf_tables_api.c
View file

@ -89,6 +89,7 @@ nf_tables_afinfo_lookup(struct net *net, int family, bool autoload)
}
static void nft_ctx_init(struct nft_ctx *ctx,
struct net *net,
const struct sk_buff *skb,
const struct nlmsghdr *nlh,
struct nft_af_info *afi,
@ -96,7 +97,7 @@ static void nft_ctx_init(struct nft_ctx *ctx,
struct nft_chain *chain,
const struct nlattr * const *nla)
{
ctx->net = sock_net(skb->sk);
ctx->net = net;
ctx->afi = afi;
ctx->table = table;
ctx->chain = chain;
@ -672,15 +673,14 @@ static int nf_tables_updtable(struct nft_ctx *ctx)
return ret;
}
static int nf_tables_newtable(struct sock *nlsk, struct sk_buff *skb,
const struct nlmsghdr *nlh,
static int nf_tables_newtable(struct net *net, struct sock *nlsk,
struct sk_buff *skb, const struct nlmsghdr *nlh,
const struct nlattr * const nla[])
{
const struct nfgenmsg *nfmsg = nlmsg_data(nlh);
const struct nlattr *name;
struct nft_af_info *afi;
struct nft_table *table;
struct net *net = sock_net(skb->sk);
int family = nfmsg->nfgen_family;
u32 flags = 0;
struct nft_ctx ctx;
@ -706,7 +706,7 @@ static int nf_tables_newtable(struct sock *nlsk, struct sk_buff *skb,
if (nlh->nlmsg_flags & NLM_F_REPLACE)
return -EOPNOTSUPP;
nft_ctx_init(&ctx, skb, nlh, afi, table, NULL, nla);
nft_ctx_init(&ctx, net, skb, nlh, afi, table, NULL, nla);
return nf_tables_updtable(&ctx);
}
@ -730,7 +730,7 @@ static int nf_tables_newtable(struct sock *nlsk, struct sk_buff *skb,
INIT_LIST_HEAD(&table->sets);
table->flags = flags;
nft_ctx_init(&ctx, skb, nlh, afi, table, NULL, nla);
nft_ctx_init(&ctx, net, skb, nlh, afi, table, NULL, nla);
err = nft_trans_table_add(&ctx, NFT_MSG_NEWTABLE);
if (err < 0)
goto err3;
@ -810,18 +810,17 @@ static int nft_flush(struct nft_ctx *ctx, int family)
return err;
}
static int nf_tables_deltable(struct sock *nlsk, struct sk_buff *skb,
const struct nlmsghdr *nlh,
static int nf_tables_deltable(struct net *net, struct sock *nlsk,
struct sk_buff *skb, const struct nlmsghdr *nlh,
const struct nlattr * const nla[])
{
const struct nfgenmsg *nfmsg = nlmsg_data(nlh);
struct nft_af_info *afi;
struct nft_table *table;
struct net *net = sock_net(skb->sk);
int family = nfmsg->nfgen_family;
struct nft_ctx ctx;
nft_ctx_init(&ctx, skb, nlh, NULL, NULL, NULL, nla);
nft_ctx_init(&ctx, net, skb, nlh, NULL, NULL, NULL, nla);
if (family == AF_UNSPEC || nla[NFTA_TABLE_NAME] == NULL)
return nft_flush(&ctx, family);
@ -1221,8 +1220,8 @@ static void nf_tables_chain_destroy(struct nft_chain *chain)
}
}
static int nf_tables_newchain(struct sock *nlsk, struct sk_buff *skb,
const struct nlmsghdr *nlh,
static int nf_tables_newchain(struct net *net, struct sock *nlsk,
struct sk_buff *skb, const struct nlmsghdr *nlh,
const struct nlattr * const nla[])
{
const struct nfgenmsg *nfmsg = nlmsg_data(nlh);
@ -1232,7 +1231,6 @@ static int nf_tables_newchain(struct sock *nlsk, struct sk_buff *skb,
struct nft_chain *chain;
struct nft_base_chain *basechain = NULL;
struct nlattr *ha[NFTA_HOOK_MAX + 1];
struct net *net = sock_net(skb->sk);
int family = nfmsg->nfgen_family;
struct net_device *dev = NULL;
u8 policy = NF_ACCEPT;
@ -1313,7 +1311,7 @@ static int nf_tables_newchain(struct sock *nlsk, struct sk_buff *skb,
return PTR_ERR(stats);
}
nft_ctx_init(&ctx, skb, nlh, afi, table, chain, nla);
nft_ctx_init(&ctx, net, skb, nlh, afi, table, chain, nla);
trans = nft_trans_alloc(&ctx, NFT_MSG_NEWCHAIN,
sizeof(struct nft_trans_chain));
if (trans == NULL) {
@ -1461,7 +1459,7 @@ static int nf_tables_newchain(struct sock *nlsk, struct sk_buff *skb,
if (err < 0)
goto err1;
nft_ctx_init(&ctx, skb, nlh, afi, table, chain, nla);
nft_ctx_init(&ctx, net, skb, nlh, afi, table, chain, nla);
err = nft_trans_chain_add(&ctx, NFT_MSG_NEWCHAIN);
if (err < 0)
goto err2;
@ -1476,15 +1474,14 @@ static int nf_tables_newchain(struct sock *nlsk, struct sk_buff *skb,
return err;
}
static int nf_tables_delchain(struct sock *nlsk, struct sk_buff *skb,
const struct nlmsghdr *nlh,
static int nf_tables_delchain(struct net *net, struct sock *nlsk,
struct sk_buff *skb, const struct nlmsghdr *nlh,
const struct nlattr * const nla[])
{
const struct nfgenmsg *nfmsg = nlmsg_data(nlh);
struct nft_af_info *afi;
struct nft_table *table;
struct nft_chain *chain;
struct net *net = sock_net(skb->sk);
int family = nfmsg->nfgen_family;
struct nft_ctx ctx;
@ -1506,7 +1503,7 @@ static int nf_tables_delchain(struct sock *nlsk, struct sk_buff *skb,
if (chain->use > 0)
return -EBUSY;
nft_ctx_init(&ctx, skb, nlh, afi, table, chain, nla);
nft_ctx_init(&ctx, net, skb, nlh, afi, table, chain, nla);
return nft_delchain(&ctx);
}
@ -2010,13 +2007,12 @@ static void nf_tables_rule_destroy(const struct nft_ctx *ctx,
static struct nft_expr_info *info;
static int nf_tables_newrule(struct sock *nlsk, struct sk_buff *skb,
const struct nlmsghdr *nlh,
static int nf_tables_newrule(struct net *net, struct sock *nlsk,
struct sk_buff *skb, const struct nlmsghdr *nlh,
const struct nlattr * const nla[])
{
const struct nfgenmsg *nfmsg = nlmsg_data(nlh);
struct nft_af_info *afi;
struct net *net = sock_net(skb->sk);
struct nft_table *table;
struct nft_chain *chain;
struct nft_rule *rule, *old_rule = NULL;
@ -2075,7 +2071,7 @@ static int nf_tables_newrule(struct sock *nlsk, struct sk_buff *skb,
return PTR_ERR(old_rule);
}
nft_ctx_init(&ctx, skb, nlh, afi, table, chain, nla);
nft_ctx_init(&ctx, net, skb, nlh, afi, table, chain, nla);
n = 0;
size = 0;
@ -2176,13 +2172,12 @@ static int nf_tables_newrule(struct sock *nlsk, struct sk_buff *skb,
return err;
}
static int nf_tables_delrule(struct sock *nlsk, struct sk_buff *skb,
const struct nlmsghdr *nlh,
static int nf_tables_delrule(struct net *net, struct sock *nlsk,
struct sk_buff *skb, const struct nlmsghdr *nlh,
const struct nlattr * const nla[])
{
const struct nfgenmsg *nfmsg = nlmsg_data(nlh);
struct nft_af_info *afi;
struct net *net = sock_net(skb->sk);
struct nft_table *table;
struct nft_chain *chain = NULL;
struct nft_rule *rule;
@ -2205,7 +2200,7 @@ static int nf_tables_delrule(struct sock *nlsk, struct sk_buff *skb,
return PTR_ERR(chain);
}
nft_ctx_init(&ctx, skb, nlh, afi, table, chain, nla);
nft_ctx_init(&ctx, net, skb, nlh, afi, table, chain, nla);
if (chain) {
if (nla[NFTA_RULE_HANDLE]) {
@ -2344,12 +2339,11 @@ static const struct nla_policy nft_set_desc_policy[NFTA_SET_DESC_MAX + 1] = {
[NFTA_SET_DESC_SIZE] = { .type = NLA_U32 },
};
static int nft_ctx_init_from_setattr(struct nft_ctx *ctx,
static int nft_ctx_init_from_setattr(struct nft_ctx *ctx, struct net *net,
const struct sk_buff *skb,
const struct nlmsghdr *nlh,
const struct nlattr * const nla[])
{
struct net *net = sock_net(skb->sk);
const struct nfgenmsg *nfmsg = nlmsg_data(nlh);
struct nft_af_info *afi = NULL;
struct nft_table *table = NULL;
@ -2371,7 +2365,7 @@ static int nft_ctx_init_from_setattr(struct nft_ctx *ctx,
return -ENOENT;
}
nft_ctx_init(ctx, skb, nlh, afi, table, NULL, nla);
nft_ctx_init(ctx, net, skb, nlh, afi, table, NULL, nla);
return 0;
}
@ -2623,6 +2617,7 @@ static int nf_tables_getset(struct sock *nlsk, struct sk_buff *skb,
const struct nlmsghdr *nlh,
const struct nlattr * const nla[])
{
struct net *net = sock_net(skb->sk);
const struct nft_set *set;
struct nft_ctx ctx;
struct sk_buff *skb2;
@ -2630,7 +2625,7 @@ static int nf_tables_getset(struct sock *nlsk, struct sk_buff *skb,
int err;
/* Verify existence before starting dump */
err = nft_ctx_init_from_setattr(&ctx, skb, nlh, nla);
err = nft_ctx_init_from_setattr(&ctx, net, skb, nlh, nla);
if (err < 0)
return err;
@ -2693,14 +2688,13 @@ static int nf_tables_set_desc_parse(const struct nft_ctx *ctx,
return 0;
}
static int nf_tables_newset(struct sock *nlsk, struct sk_buff *skb,
const struct nlmsghdr *nlh,
static int nf_tables_newset(struct net *net, struct sock *nlsk,
struct sk_buff *skb, const struct nlmsghdr *nlh,
const struct nlattr * const nla[])
{
const struct nfgenmsg *nfmsg = nlmsg_data(nlh);
const struct nft_set_ops *ops;
struct nft_af_info *afi;
struct net *net = sock_net(skb->sk);
struct nft_table *table;
struct nft_set *set;
struct nft_ctx ctx;
@ -2798,7 +2792,7 @@ static int nf_tables_newset(struct sock *nlsk, struct sk_buff *skb,
if (IS_ERR(table))
return PTR_ERR(table);
nft_ctx_init(&ctx, skb, nlh, afi, table, NULL, nla);
nft_ctx_init(&ctx, net, skb, nlh, afi, table, NULL, nla);
set = nf_tables_set_lookup(table, nla[NFTA_SET_NAME]);
if (IS_ERR(set)) {
@ -2882,8 +2876,8 @@ static void nf_tables_set_destroy(const struct nft_ctx *ctx, struct nft_set *set
nft_set_destroy(set);
}
static int nf_tables_delset(struct sock *nlsk, struct sk_buff *skb,
const struct nlmsghdr *nlh,
static int nf_tables_delset(struct net *net, struct sock *nlsk,
struct sk_buff *skb, const struct nlmsghdr *nlh,
const struct nlattr * const nla[])
{
const struct nfgenmsg *nfmsg = nlmsg_data(nlh);
@ -2896,7 +2890,7 @@ static int nf_tables_delset(struct sock *nlsk, struct sk_buff *skb,
if (nla[NFTA_SET_TABLE] == NULL)
return -EINVAL;
err = nft_ctx_init_from_setattr(&ctx, skb, nlh, nla);
err = nft_ctx_init_from_setattr(&ctx, net, skb, nlh, nla);
if (err < 0)
return err;
@ -3024,7 +3018,7 @@ static const struct nla_policy nft_set_elem_list_policy[NFTA_SET_ELEM_LIST_MAX +
[NFTA_SET_ELEM_LIST_SET_ID] = { .type = NLA_U32 },
};
static int nft_ctx_init_from_elemattr(struct nft_ctx *ctx,
static int nft_ctx_init_from_elemattr(struct nft_ctx *ctx, struct net *net,
const struct sk_buff *skb,
const struct nlmsghdr *nlh,
const struct nlattr * const nla[],
@ -3033,7 +3027,6 @@ static int nft_ctx_init_from_elemattr(struct nft_ctx *ctx,
const struct nfgenmsg *nfmsg = nlmsg_data(nlh);
struct nft_af_info *afi;
struct nft_table *table;
struct net *net = sock_net(skb->sk);
afi = nf_tables_afinfo_lookup(net, nfmsg->nfgen_family, false);
if (IS_ERR(afi))
@ -3045,7 +3038,7 @@ static int nft_ctx_init_from_elemattr(struct nft_ctx *ctx,
if (!trans && (table->flags & NFT_TABLE_INACTIVE))
return -ENOENT;
nft_ctx_init(ctx, skb, nlh, afi, table, NULL, nla);
nft_ctx_init(ctx, net, skb, nlh, afi, table, NULL, nla);
return 0;
}
@ -3135,6 +3128,7 @@ static int nf_tables_dump_setelem(const struct nft_ctx *ctx,
static int nf_tables_dump_set(struct sk_buff *skb, struct netlink_callback *cb)
{
struct net *net = sock_net(skb->sk);
const struct nft_set *set;
struct nft_set_dump_args args;
struct nft_ctx ctx;
@ -3150,8 +3144,8 @@ static int nf_tables_dump_set(struct sk_buff *skb, struct netlink_callback *cb)
if (err < 0)
return err;
err = nft_ctx_init_from_elemattr(&ctx, cb->skb, cb->nlh, (void *)nla,
false);
err = nft_ctx_init_from_elemattr(&ctx, net, cb->skb, cb->nlh,
(void *)nla, false);
if (err < 0)
return err;
@ -3212,11 +3206,12 @@ static int nf_tables_getsetelem(struct sock *nlsk, struct sk_buff *skb,
const struct nlmsghdr *nlh,
const struct nlattr * const nla[])
{
struct net *net = sock_net(skb->sk);
const struct nft_set *set;
struct nft_ctx ctx;
int err;
err = nft_ctx_init_from_elemattr(&ctx, skb, nlh, nla, false);
err = nft_ctx_init_from_elemattr(&ctx, net, skb, nlh, nla, false);
if (err < 0)
return err;
@ -3528,11 +3523,10 @@ static int nft_add_set_elem(struct nft_ctx *ctx, struct nft_set *set,
return err;
}
static int nf_tables_newsetelem(struct sock *nlsk, struct sk_buff *skb,
const struct nlmsghdr *nlh,
static int nf_tables_newsetelem(struct net *net, struct sock *nlsk,
struct sk_buff *skb, const struct nlmsghdr *nlh,
const struct nlattr * const nla[])
{
struct net *net = sock_net(skb->sk);
const struct nlattr *attr;
struct nft_set *set;
struct nft_ctx ctx;
@ -3541,7 +3535,7 @@ static int nf_tables_newsetelem(struct sock *nlsk, struct sk_buff *skb,
if (nla[NFTA_SET_ELEM_LIST_ELEMENTS] == NULL)
return -EINVAL;
err = nft_ctx_init_from_elemattr(&ctx, skb, nlh, nla, true);
err = nft_ctx_init_from_elemattr(&ctx, net, skb, nlh, nla, true);
if (err < 0)
return err;
@ -3623,8 +3617,8 @@ static int nft_del_setelem(struct nft_ctx *ctx, struct nft_set *set,
return err;
}
static int nf_tables_delsetelem(struct sock *nlsk, struct sk_buff *skb,
const struct nlmsghdr *nlh,
static int nf_tables_delsetelem(struct net *net, struct sock *nlsk,
struct sk_buff *skb, const struct nlmsghdr *nlh,
const struct nlattr * const nla[])
{
const struct nlattr *attr;
@ -3635,7 +3629,7 @@ static int nf_tables_delsetelem(struct sock *nlsk, struct sk_buff *skb,
if (nla[NFTA_SET_ELEM_LIST_ELEMENTS] == NULL)
return -EINVAL;
err = nft_ctx_init_from_elemattr(&ctx, skb, nlh, nla, false);
err = nft_ctx_init_from_elemattr(&ctx, net, skb, nlh, nla, false);
if (err < 0)
return err;
@ -4030,7 +4024,8 @@ static int nf_tables_abort(struct sk_buff *skb)
struct nft_trans *trans, *next;
struct nft_trans_elem *te;
list_for_each_entry_safe(trans, next, &net->nft.commit_list, list) {
list_for_each_entry_safe_reverse(trans, next, &net->nft.commit_list,
list) {
switch (trans->msg_type) {
case NFT_MSG_NEWTABLE:
if (nft_trans_table_update(trans)) {

4
net/netfilter/nfnetlink.c
View file

@ -295,8 +295,6 @@ static void nfnetlink_rcv_batch(struct sk_buff *skb, struct nlmsghdr *nlh,
if (!skb)
return netlink_ack(oskb, nlh, -ENOMEM);
skb->sk = oskb->sk;
nfnl_lock(subsys_id);
ss = rcu_dereference_protected(table[subsys_id].subsys,
lockdep_is_held(&table[subsys_id].mutex));
@ -381,7 +379,7 @@ static void nfnetlink_rcv_batch(struct sk_buff *skb, struct nlmsghdr *nlh,
goto ack;
if (nc->call_batch) {
err = nc->call_batch(net->nfnl, skb, nlh,
err = nc->call_batch(net, net->nfnl, skb, nlh,
(const struct nlattr **)cda);
}

9
net/netfilter/nfnetlink_queue.c
View file

@ -365,8 +365,9 @@ nfqnl_build_packet_message(struct net *net, struct nfqnl_instance *queue,
break;
}
nfnl_ct = rcu_dereference(nfnl_ct_hook);
if (queue->flags & NFQA_CFG_F_CONNTRACK) {
nfnl_ct = rcu_dereference(nfnl_ct_hook);
if (nfnl_ct != NULL) {
ct = nfnl_ct->get_ct(entskb, &ctinfo);
if (ct != NULL)
@ -1064,9 +1065,10 @@ nfqnl_recv_verdict(struct sock *ctnl, struct sk_buff *skb,
if (entry == NULL)
return -ENOENT;
/* rcu lock already held from nfnl->call_rcu. */
nfnl_ct = rcu_dereference(nfnl_ct_hook);
if (nfqa[NFQA_CT]) {
/* rcu lock already held from nfnl->call_rcu. */
nfnl_ct = rcu_dereference(nfnl_ct_hook);
if (nfnl_ct != NULL)
ct = nfqnl_ct_parse(nfnl_ct, nlh, nfqa, entry, &ctinfo);
}
@ -1417,6 +1419,7 @@ static int __init nfnetlink_queue_init(void)
cleanup_netlink_notifier:
netlink_unregister_notifier(&nfqnl_rtnl_notifier);
unregister_pernet_subsys(&nfnl_queue_net_ops);
out:
return status;
}