From 15932461c91e8aedf54e885d429b954b439605d2 Mon Sep 17 00:00:00 2001 From: Jozsef Kadlecsik Date: Wed, 14 Jul 2021 12:37:07 +0200 Subject: Limit the maximal range of consecutive elements to add/delete The range size of consecutive elements were not limited. Thus one could define a huge range which may result soft lockup errors due to the long execution time. Now the range size is limited to 2^20 entries. Reported by Brad Spengler. Signed-off-by: Jozsef Kadlecsik --- kernel/net/netfilter/ipset/ip_set_hash_ipportnet.c | 3 +++ 1 file changed, 3 insertions(+) (limited to 'kernel/net/netfilter/ipset/ip_set_hash_ipportnet.c') diff --git a/kernel/net/netfilter/ipset/ip_set_hash_ipportnet.c b/kernel/net/netfilter/ipset/ip_set_hash_ipportnet.c index 64f82f2..94dde47 100644 --- a/kernel/net/netfilter/ipset/ip_set_hash_ipportnet.c +++ b/kernel/net/netfilter/ipset/ip_set_hash_ipportnet.c @@ -247,6 +247,9 @@ hash_ipportnet4_uadt(struct ip_set *set, struct nlattr *tb[], ip_set_mask_from_to(ip, ip_to, cidr); } + if ((ip_to - ip + 1)*(port_to - port + 1) > IPSET_MAX_RANGE) + return -ERANGE; + port_to = port = ntohs(e.port); if (tb[IPSET_ATTR_PORT_TO]) { port_to = ip_set_get_h16(tb[IPSET_ATTR_PORT_TO]); -- cgit v1.2.3