5.4-stable review patch. If anyone has any objections, please let me know.
------------------
From: Kyle Zeng <zengyhkyle@xxxxxxxxx>
commit 050d91c03b28ca479df13dfb02bcd2c60dd6a878 upstream.
The missing IP_SET_HASH_WITH_NET0 macro in ip_set_hash_netportnet can
lead to the use of wrong `CIDR_POS(c)` for calculating array offsets,
which can lead to integer underflow. As a result, it leads to slab
out-of-bound access.
This patch adds back the IP_SET_HASH_WITH_NET0 macro to
ip_set_hash_netportnet to address the issue.
Fixes: 886503f34d63 ("netfilter: ipset: actually allow allowable CIDR 0 in hash:net,port,net")
Suggested-by: Jozsef Kadlecsik <kadlec@xxxxxxxxxxxxx>
Signed-off-by: Kyle Zeng <zengyhkyle@xxxxxxxxx>
Acked-by: Jozsef Kadlecsik <kadlec@xxxxxxxxxxxxx>
Signed-off-by: Florian Westphal <fw@xxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
net/netfilter/ipset/ip_set_hash_netportnet.c | 1 +
1 file changed, 1 insertion(+)
--- a/net/netfilter/ipset/ip_set_hash_netportnet.c
+++ b/net/netfilter/ipset/ip_set_hash_netportnet.c
@@ -35,6 +35,7 @@ MODULE_ALIAS("ip_set_hash:net,port,net")
#define IP_SET_HASH_WITH_PROTO
#define IP_SET_HASH_WITH_NETS
#define IPSET_NET_COUNT 2
+#define IP_SET_HASH_WITH_NET0
/* IPv4 variant */
