From: Kyle Zeng zengyhkyle@gmail.com

mainline inclusion from mainline-v6.6-rc1 commit 050d91c03b28ca479df13dfb02bcd2c60dd6a878 category: bugfix bugzilla: 189250 CVE: CVE-2023-42753

Reference: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?i...

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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@netfilter.org Signed-off-by: Kyle Zeng zengyhkyle@gmail.com Acked-by: Jozsef Kadlecsik kadlec@netfilter.org Signed-off-by: Florian Westphal fw@strlen.de Signed-off-by: Lu Wei luwei32@huawei.com --- net/netfilter/ipset/ip_set_hash_netportnet.c | 1 + 1 file changed, 1 insertion(+)

diff --git a/net/netfilter/ipset/ip_set_hash_netportnet.c b/net/netfilter/ipset/ip_set_hash_netportnet.c index 613e18e720a4..9290a4d7b862 100644 --- a/net/netfilter/ipset/ip_set_hash_netportnet.c +++ b/net/netfilter/ipset/ip_set_hash_netportnet.c @@ -39,6 +39,7 @@ 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 */