selinux: pull address family directly from the request_sock struct

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>

1 files changed, 1 insertions, 5 deletions

diff --git a/security/selinux/hooks.c b/security/selinux/hooks.c
index cc076a9b0344..17d7689660ea 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;