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netfilter: ipset: Fix nla_policies to fully support NL_VALIDATE_STRICT 

Since v5.2 (commit "netlink: re-add parse/validate functions in strict
mode") NL_VALIDATE_STRICT is enabled. Fix the ipset nla_policies which did
not support strict mode and convert from deprecated parsings to verified ones.

Signed-off-by: Jozsef Kadlecsik <kadlec@netfilter.org>
This commit is contained in:
Jozsef Kadlecsik 2019-11-01 17:13:18 +01:00
parent 97664bc2c7
commit 1289975643
3 changed files with 30 additions and 13 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

41
net/netfilter/ipset/ip_set_core.c
View File

@ -296,7 +296,8 @@ ip_set_get_ipaddr4(struct nlattr *nla, __be32 *ipaddr)
if (unlikely(!flag_nested(nla)))
return -IPSET_ERR_PROTOCOL;
if (nla_parse_nested_deprecated(tb, IPSET_ATTR_IPADDR_MAX, nla, ipaddr_policy, NULL))
if (nla_parse_nested(tb, IPSET_ATTR_IPADDR_MAX, nla,
ipaddr_policy, NULL))
return -IPSET_ERR_PROTOCOL;
if (unlikely(!ip_set_attr_netorder(tb, IPSET_ATTR_IPADDR_IPV4)))
return -IPSET_ERR_PROTOCOL;
@ -314,7 +315,8 @@ ip_set_get_ipaddr6(struct nlattr *nla, union nf_inet_addr *ipaddr)
if (unlikely(!flag_nested(nla)))
return -IPSET_ERR_PROTOCOL;
if (nla_parse_nested_deprecated(tb, IPSET_ATTR_IPADDR_MAX, nla, ipaddr_policy, NULL))
if (nla_parse_nested(tb, IPSET_ATTR_IPADDR_MAX, nla,
ipaddr_policy, NULL))
return -IPSET_ERR_PROTOCOL;
if (unlikely(!ip_set_attr_netorder(tb, IPSET_ATTR_IPADDR_IPV6)))
return -IPSET_ERR_PROTOCOL;
@ -934,7 +936,8 @@ static int ip_set_create(struct net *net, struct sock *ctnl,
/* Without holding any locks, create private part. */
if (attr[IPSET_ATTR_DATA] &&
nla_parse_nested_deprecated(tb, IPSET_ATTR_CREATE_MAX, attr[IPSET_ATTR_DATA], set->type->create_policy, NULL)) {
nla_parse_nested(tb, IPSET_ATTR_CREATE_MAX, attr[IPSET_ATTR_DATA],
set->type->create_policy, NULL)) {
ret = -IPSET_ERR_PROTOCOL;
goto put_out;
}
@ -1281,6 +1284,14 @@ dump_attrs(struct nlmsghdr *nlh)
}
}
static const struct nla_policy
ip_set_dump_policy[IPSET_ATTR_CMD_MAX + 1] = {
[IPSET_ATTR_PROTOCOL] = { .type = NLA_U8 },
[IPSET_ATTR_SETNAME] = { .type = NLA_NUL_STRING,
.len = IPSET_MAXNAMELEN - 1 },
[IPSET_ATTR_FLAGS] = { .type = NLA_U32 },
};
static int
dump_init(struct netlink_callback *cb, struct ip_set_net *inst)
{
@ -1292,9 +1303,9 @@ dump_init(struct netlink_callback *cb, struct ip_set_net *inst)
ip_set_id_t index;
int ret;
ret = nla_parse_deprecated(cda, IPSET_ATTR_CMD_MAX, attr,
nlh->nlmsg_len - min_len,
ip_set_setname_policy, NULL);
ret = nla_parse(cda, IPSET_ATTR_CMD_MAX, attr,
nlh->nlmsg_len - min_len,
ip_set_dump_policy, NULL);
if (ret)
return ret;
@ -1543,9 +1554,9 @@ call_ad(struct sock *ctnl, struct sk_buff *skb, struct ip_set *set,
memcpy(&errmsg->msg, nlh, nlh->nlmsg_len);
cmdattr = (void *)&errmsg->msg + min_len;
ret = nla_parse_deprecated(cda, IPSET_ATTR_CMD_MAX, cmdattr,
nlh->nlmsg_len - min_len,
ip_set_adt_policy, NULL);
ret = nla_parse(cda, IPSET_ATTR_CMD_MAX, cmdattr,
nlh->nlmsg_len - min_len, ip_set_adt_policy,
NULL);
if (ret) {
nlmsg_free(skb2);
@ -1596,7 +1607,9 @@ static int ip_set_ad(struct net *net, struct sock *ctnl,
use_lineno = !!attr[IPSET_ATTR_LINENO];
if (attr[IPSET_ATTR_DATA]) {
if (nla_parse_nested_deprecated(tb, IPSET_ATTR_ADT_MAX, attr[IPSET_ATTR_DATA], set->type->adt_policy, NULL))
if (nla_parse_nested(tb, IPSET_ATTR_ADT_MAX,
attr[IPSET_ATTR_DATA],
set->type->adt_policy, NULL))
return -IPSET_ERR_PROTOCOL;
ret = call_ad(ctnl, skb, set, tb, adt, flags,
use_lineno);
@ -1606,7 +1619,8 @@ static int ip_set_ad(struct net *net, struct sock *ctnl,
nla_for_each_nested(nla, attr[IPSET_ATTR_ADT], nla_rem) {
if (nla_type(nla) != IPSET_ATTR_DATA ||
!flag_nested(nla) ||
nla_parse_nested_deprecated(tb, IPSET_ATTR_ADT_MAX, nla, set->type->adt_policy, NULL))
nla_parse_nested(tb, IPSET_ATTR_ADT_MAX, nla,
set->type->adt_policy, NULL))
return -IPSET_ERR_PROTOCOL;
ret = call_ad(ctnl, skb, set, tb, adt,
flags, use_lineno);
@ -1655,7 +1669,8 @@ static int ip_set_utest(struct net *net, struct sock *ctnl, struct sk_buff *skb,
if (!set)
return -ENOENT;
if (nla_parse_nested_deprecated(tb, IPSET_ATTR_ADT_MAX, attr[IPSET_ATTR_DATA], set->type->adt_policy, NULL))
if (nla_parse_nested(tb, IPSET_ATTR_ADT_MAX, attr[IPSET_ATTR_DATA],
set->type->adt_policy, NULL))
return -IPSET_ERR_PROTOCOL;
rcu_read_lock_bh();
@ -1961,7 +1976,7 @@ static const struct nfnl_callback ip_set_netlink_subsys_cb[IPSET_MSG_MAX] = {
[IPSET_CMD_LIST] = {
.call = ip_set_dump,
.attr_count = IPSET_ATTR_CMD_MAX,
.policy = ip_set_setname_policy,
.policy = ip_set_dump_policy,
},
[IPSET_CMD_SAVE] = {
.call = ip_set_dump,

1
net/netfilter/ipset/ip_set_hash_net.c
View File

@ -368,6 +368,7 @@ static struct ip_set_type hash_net_type __read_mostly = {
[IPSET_ATTR_IP_TO] = { .type = NLA_NESTED },
[IPSET_ATTR_CIDR] = { .type = NLA_U8 },
[IPSET_ATTR_TIMEOUT] = { .type = NLA_U32 },
[IPSET_ATTR_LINENO] = { .type = NLA_U32 },
[IPSET_ATTR_CADT_FLAGS] = { .type = NLA_U32 },
[IPSET_ATTR_BYTES] = { .type = NLA_U64 },
[IPSET_ATTR_PACKETS] = { .type = NLA_U64 },

1
net/netfilter/ipset/ip_set_hash_netnet.c
View File

@ -476,6 +476,7 @@ static struct ip_set_type hash_netnet_type __read_mostly = {
[IPSET_ATTR_CIDR] = { .type = NLA_U8 },
[IPSET_ATTR_CIDR2] = { .type = NLA_U8 },
[IPSET_ATTR_TIMEOUT] = { .type = NLA_U32 },
[IPSET_ATTR_LINENO] = { .type = NLA_U32 },
[IPSET_ATTR_CADT_FLAGS] = { .type = NLA_U32 },
[IPSET_ATTR_BYTES] = { .type = NLA_U64 },
[IPSET_ATTR_PACKETS] = { .type = NLA_U64 },