From: Florian Westphal <fw@strlen.de> mainline inclusion from mainline-v5.16-rc1 commit c650c35a2506d8eebe8a4d8d263317fba29fe078 category: bugfix bugzilla: https://atomgit.com/src-openeuler/kernel/issues/18235 CVE: CVE-2026-74724 Reference: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?i... -------------------------------- Similar to earlier patches: allow ipv4 and ipv6 to use the same handler. ipv4 and ipv6 specific actions can be done by checking state->pf. v2: split the pf == NFPROTO_IPV4 check (Julian Anastasov) Signed-off-by: Florian Westphal <fw@strlen.de> Acked-by: Julian Anastasov <ja@ssi.bg> Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org> Signed-off-by: Zhang Changzhong <zhangchangzhong@huawei.com> --- net/netfilter/ipvs/ip_vs_core.c | 37 ++++++++++++++----------------------- 1 file changed, 14 insertions(+), 23 deletions(-) diff --git a/net/netfilter/ipvs/ip_vs_core.c b/net/netfilter/ipvs/ip_vs_core.c index f118236..1911c69 100644 --- a/net/netfilter/ipvs/ip_vs_core.c +++ b/net/netfilter/ipvs/ip_vs_core.c @@ -2118,40 +2118,31 @@ static unsigned int ip_vs_forward_icmp(void *priv, struct sk_buff *skb, const struct nf_hook_state *state) { - int r; struct netns_ipvs *ipvs = net_ipvs(state->net); - - if (ip_hdr(skb)->protocol != IPPROTO_ICMP) - return NF_ACCEPT; + int r; /* ipvs enabled in this netns ? */ if (unlikely(sysctl_backup_only(ipvs) || !ipvs->enable)) return NF_ACCEPT; - return ip_vs_in_icmp(ipvs, skb, &r, state->hook); -} - + if (state->pf == NFPROTO_IPV4) { + if (ip_hdr(skb)->protocol != IPPROTO_ICMP) + return NF_ACCEPT; #ifdef CONFIG_IP_VS_IPV6 -static unsigned int -ip_vs_forward_icmp_v6(void *priv, struct sk_buff *skb, - const struct nf_hook_state *state) -{ - int r; - struct netns_ipvs *ipvs = net_ipvs(state->net); - struct ip_vs_iphdr iphdr; + } else { + struct ip_vs_iphdr iphdr; - ip_vs_fill_iph_skb(AF_INET6, skb, false, &iphdr); - if (iphdr.protocol != IPPROTO_ICMPV6) - return NF_ACCEPT; + ip_vs_fill_iph_skb(AF_INET6, skb, false, &iphdr); - /* ipvs enabled in this netns ? */ - if (unlikely(sysctl_backup_only(ipvs) || !ipvs->enable)) - return NF_ACCEPT; + if (iphdr.protocol != IPPROTO_ICMPV6) + return NF_ACCEPT; - return ip_vs_in_icmp_v6(ipvs, skb, &r, state->hook, &iphdr); -} + return ip_vs_in_icmp_v6(ipvs, skb, &r, state->hook, &iphdr); #endif + } + return ip_vs_in_icmp(ipvs, skb, &r, state->hook); +} static const struct nf_hook_ops ip_vs_ops4[] = { /* After packet filtering, change source only for VS/NAT */ @@ -2236,7 +2227,7 @@ static const struct nf_hook_ops ip_vs_ops6[] = { /* After packet filtering (but before ip_vs_out_icmp), catch icmp * destined for 0.0.0.0/0, which is for incoming IPVS connections */ { - .hook = ip_vs_forward_icmp_v6, + .hook = ip_vs_forward_icmp, .pf = NFPROTO_IPV6, .hooknum = NF_INET_FORWARD, .priority = 99, -- 2.9.5