From 4342f70538b929b188c6e370fe24a155e6532eb2 Mon Sep 17 00:00:00 2001 From: Florian Westphal Date: Mon, 11 Oct 2021 22:22:29 +0200 Subject: selinux: remove unneeded ipv6 hook wrappers Netfilter places the protocol number the hook function is getting called from in state->pf, so we can use that instead of an extra wrapper. While at it, remove one-line wrappers too and make selinux_ip_{out,forward,postroute} useable as hook function. Signed-off-by: Florian Westphal Message-Id: <20211011202229.28289-1-fw@strlen.de> Signed-off-by: Paul Moore --- security/selinux/hooks.c | 80 +++++++++++------------------------------------- 1 file changed, 18 insertions(+), 62 deletions(-) (limited to 'security') diff --git a/security/selinux/hooks.c b/security/selinux/hooks.c index 7297d1f0a9df..4210831d5ade 100644 --- a/security/selinux/hooks.c +++ b/security/selinux/hooks.c @@ -5689,10 +5689,11 @@ static int selinux_tun_dev_open(void *security) #ifdef CONFIG_NETFILTER -static unsigned int selinux_ip_forward(struct sk_buff *skb, - const struct net_device *indev, - u16 family) +static unsigned int selinux_ip_forward(void *priv, struct sk_buff *skb, + const struct nf_hook_state *state) { + const struct net_device *indev = state->in; + u16 family = state->pf; int err; char *addrp; u32 peer_sid; @@ -5747,25 +5748,10 @@ static unsigned int selinux_ip_forward(struct sk_buff *skb, return NF_ACCEPT; } -static unsigned int selinux_ipv4_forward(void *priv, - struct sk_buff *skb, - const struct nf_hook_state *state) -{ - return selinux_ip_forward(skb, state->in, PF_INET); -} - -#if IS_ENABLED(CONFIG_IPV6) -static unsigned int selinux_ipv6_forward(void *priv, - struct sk_buff *skb, - const struct nf_hook_state *state) -{ - return selinux_ip_forward(skb, state->in, PF_INET6); -} -#endif /* IPV6 */ - -static unsigned int selinux_ip_output(struct sk_buff *skb, - u16 family) +static unsigned int selinux_ip_output(void *priv, struct sk_buff *skb, + const struct nf_hook_state *state) { + u16 family = state->pf; struct sock *sk; u32 sid; @@ -5805,21 +5791,6 @@ static unsigned int selinux_ip_output(struct sk_buff *skb, return NF_ACCEPT; } -static unsigned int selinux_ipv4_output(void *priv, - struct sk_buff *skb, - const struct nf_hook_state *state) -{ - return selinux_ip_output(skb, PF_INET); -} - -#if IS_ENABLED(CONFIG_IPV6) -static unsigned int selinux_ipv6_output(void *priv, - struct sk_buff *skb, - const struct nf_hook_state *state) -{ - return selinux_ip_output(skb, PF_INET6); -} -#endif /* IPV6 */ static unsigned int selinux_ip_postroute_compat(struct sk_buff *skb, int ifindex, @@ -5855,10 +5826,12 @@ static unsigned int selinux_ip_postroute_compat(struct sk_buff *skb, return NF_ACCEPT; } -static unsigned int selinux_ip_postroute(struct sk_buff *skb, - const struct net_device *outdev, - u16 family) +static unsigned int selinux_ip_postroute(void *priv, + struct sk_buff *skb, + const struct nf_hook_state *state) { + const struct net_device *outdev = state->out; + u16 family = state->pf; u32 secmark_perm; u32 peer_sid; int ifindex = outdev->ifindex; @@ -5994,23 +5967,6 @@ static unsigned int selinux_ip_postroute(struct sk_buff *skb, return NF_ACCEPT; } - -static unsigned int selinux_ipv4_postroute(void *priv, - struct sk_buff *skb, - const struct nf_hook_state *state) -{ - return selinux_ip_postroute(skb, state->out, PF_INET); -} - -#if IS_ENABLED(CONFIG_IPV6) -static unsigned int selinux_ipv6_postroute(void *priv, - struct sk_buff *skb, - const struct nf_hook_state *state) -{ - return selinux_ip_postroute(skb, state->out, PF_INET6); -} -#endif /* IPV6 */ - #endif /* CONFIG_NETFILTER */ static int selinux_netlink_send(struct sock *sk, struct sk_buff *skb) @@ -7475,38 +7431,38 @@ DEFINE_LSM(selinux) = { static const struct nf_hook_ops selinux_nf_ops[] = { { - .hook = selinux_ipv4_postroute, + .hook = selinux_ip_postroute, .pf = NFPROTO_IPV4, .hooknum = NF_INET_POST_ROUTING, .priority = NF_IP_PRI_SELINUX_LAST, }, { - .hook = selinux_ipv4_forward, + .hook = selinux_ip_forward, .pf = NFPROTO_IPV4, .hooknum = NF_INET_FORWARD, .priority = NF_IP_PRI_SELINUX_FIRST, }, { - .hook = selinux_ipv4_output, + .hook = selinux_ip_output, .pf = NFPROTO_IPV4, .hooknum = NF_INET_LOCAL_OUT, .priority = NF_IP_PRI_SELINUX_FIRST, }, #if IS_ENABLED(CONFIG_IPV6) { - .hook = selinux_ipv6_postroute, + .hook = selinux_ip_postroute, .pf = NFPROTO_IPV6, .hooknum = NF_INET_POST_ROUTING, .priority = NF_IP6_PRI_SELINUX_LAST, }, { - .hook = selinux_ipv6_forward, + .hook = selinux_ip_forward, .pf = NFPROTO_IPV6, .hooknum = NF_INET_FORWARD, .priority = NF_IP6_PRI_SELINUX_FIRST, }, { - .hook = selinux_ipv6_output, + .hook = selinux_ip_output, .pf = NFPROTO_IPV6, .hooknum = NF_INET_LOCAL_OUT, .priority = NF_IP6_PRI_SELINUX_FIRST, -- cgit v1.2.3