[PATCH] selinux: pull address family directly from the request_sock struct

[Paul Moore <pmoore@redhat.com>]

We don't need to inspect the packet to determine if the packet is an
IPv4 packet arriving on an IPv6 socket when we can query the
request_sock directly.

Signed-off-by: Paul Moore <pmoore@redhat.com>
---
 security/selinux/hooks.c |    6 +-----
 1 file changed, 1 insertion(+), 5 deletions(-)

diff --git a/security/selinux/hooks.c b/security/selinux/hooks.c
index cc076a9..17d7689 100644
--- a/security/selinux/hooks.c
+++ b/security/selinux/hooks.c
@@ -4476,14 +4476,10 @@ static int selinux_inet_conn_request(struct sock *sk, struct sk_buff *skb,
 {
 	struct sk_security_struct *sksec = sk->sk_security;
 	int err;
-	u16 family = sk->sk_family;
+	u16 family = req->rsk_ops->family;
 	u32 connsid;
 	u32 peersid;
 
-	/* handle mapped IPv4 packets arriving via IPv6 sockets */
-	if (family == PF_INET6 && skb->protocol == htons(ETH_P_IP))
-		family = PF_INET;
-
 	err = selinux_skb_peerlbl_sid(skb, family, &peersid);
 	if (err)
 		return err;


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