From 13f42a71e49164769a98fc51033c65a211861404 Mon Sep 17 00:00:00 2001 From: Jozsef Kadlecsik Date: Thu, 20 Jan 2011 17:54:26 +0100 Subject: Enforce network-order data in the netlink protocol Allow only network-order data, with NLA_F_NET_BYTEORDER flag. Sanity checks also added to prevent processing broken messages where mandatory attributes are missing. (Patrick McHardy's review) --- kernel/ip_set_bitmap_ip.c | 23 +++++++++++++++++------ 1 file changed, 17 insertions(+), 6 deletions(-) (limited to 'kernel/ip_set_bitmap_ip.c') diff --git a/kernel/ip_set_bitmap_ip.c b/kernel/ip_set_bitmap_ip.c index 7806ecc..30db991 100644 --- a/kernel/ip_set_bitmap_ip.c +++ b/kernel/ip_set_bitmap_ip.c @@ -121,10 +121,13 @@ bitmap_ip_uadt(struct ip_set *set, struct nlattr *head, int len, bitmap_ip_adt_policy)) return -IPSET_ERR_PROTOCOL; + if (unlikely(!tb[IPSET_ATTR_IP])) + return -IPSET_ERR_PROTOCOL; + if (tb[IPSET_ATTR_LINENO]) *lineno = nla_get_u32(tb[IPSET_ATTR_LINENO]); - ret = ip_set_get_hostipaddr4(tb, IPSET_ATTR_IP, &ip); + ret = ip_set_get_hostipaddr4(tb[IPSET_ATTR_IP], &ip); if (ret) return ret; @@ -140,7 +143,7 @@ bitmap_ip_uadt(struct ip_set *set, struct nlattr *head, int len, return bitmap_ip_test(map, ip_to_id(map, ip)); if (tb[IPSET_ATTR_IP_TO]) { - ret = ip_set_get_hostipaddr4(tb, IPSET_ATTR_IP_TO, &ip_to); + ret = ip_set_get_hostipaddr4(tb[IPSET_ATTR_IP_TO], &ip_to); if (ret) return ret; if (ip > ip_to) { @@ -359,10 +362,14 @@ bitmap_ip_timeout_uadt(struct ip_set *set, struct nlattr *head, int len, bitmap_ip_adt_policy)) return -IPSET_ERR_PROTOCOL; + if (unlikely(!tb[IPSET_ATTR_IP] || + !ip_set_optattr_netorder(tb, IPSET_ATTR_TIMEOUT))) + return -IPSET_ERR_PROTOCOL; + if (tb[IPSET_ATTR_LINENO]) *lineno = nla_get_u32(tb[IPSET_ATTR_LINENO]); - ret = ip_set_get_hostipaddr4(tb, IPSET_ATTR_IP, &ip); + ret = ip_set_get_hostipaddr4(tb[IPSET_ATTR_IP], &ip); if (ret) return ret; @@ -374,7 +381,7 @@ bitmap_ip_timeout_uadt(struct ip_set *set, struct nlattr *head, int len, ip_to_id((const struct bitmap_ip *)map, ip)); if (tb[IPSET_ATTR_IP_TO]) { - ret = ip_set_get_hostipaddr4(tb, IPSET_ATTR_IP_TO, &ip_to); + ret = ip_set_get_hostipaddr4(tb[IPSET_ATTR_IP_TO], &ip_to); if (ret) return ret; if (ip > ip_to) { @@ -598,12 +605,16 @@ bitmap_ip_create(struct ip_set *set, struct nlattr *head, int len, bitmap_ip_create_policy)) return -IPSET_ERR_PROTOCOL; - ret = ip_set_get_hostipaddr4(tb, IPSET_ATTR_IP, &first_ip); + if (unlikely(!tb[IPSET_ATTR_IP] || + !ip_set_optattr_netorder(tb, IPSET_ATTR_TIMEOUT))) + return -IPSET_ERR_PROTOCOL; + + ret = ip_set_get_hostipaddr4(tb[IPSET_ATTR_IP], &first_ip); if (ret) return ret; if (tb[IPSET_ATTR_IP_TO]) { - ret = ip_set_get_hostipaddr4(tb, IPSET_ATTR_IP_TO, &last_ip); + ret = ip_set_get_hostipaddr4(tb[IPSET_ATTR_IP_TO], &last_ip); if (ret) return ret; if (first_ip > last_ip) { -- cgit v1.2.3