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authorPaul Moore <paul.moore@hp.com>2008-10-10 10:16:29 -0400
committerPaul Moore <paul.moore@hp.com>2008-10-10 10:16:29 -0400
commitaa86290089a1e57b4bdbbb4720072233f66bd5b2 (patch)
tree9ab16f4d22056297f1571bb7b2b988bff84c8a10
parentaccc609322ef5ed44cba6d2d70c741afc76385fb (diff)
downloadlinux-linaro-stable-aa86290089a1e57b4bdbbb4720072233f66bd5b2.tar.gz
selinux: Correctly handle IPv4 packets on IPv6 sockets in all cases
We did the right thing in a few cases but there were several areas where we determined a packet's address family based on the socket's address family which is not the right thing to do since we can get IPv4 packets on IPv6 sockets. This patch fixes these problems by either taking the address family directly from the packet. Signed-off-by: Paul Moore <paul.moore@hp.com> Acked-by: James Morris <jmorris@namei.org>
-rw-r--r--security/selinux/hooks.c22
1 files changed, 17 insertions, 5 deletions
diff --git a/security/selinux/hooks.c b/security/selinux/hooks.c
index 03fc6a81ae32..223f474bee86 100644
--- a/security/selinux/hooks.c
+++ b/security/selinux/hooks.c
@@ -4207,10 +4207,12 @@ static int selinux_socket_getpeersec_dgram(struct socket *sock, struct sk_buff *
u32 peer_secid = SECSID_NULL;
u16 family;
- if (sock)
+ if (skb && skb->protocol == htons(ETH_P_IP))
+ family = PF_INET;
+ else if (skb && skb->protocol == htons(ETH_P_IPV6))
+ family = PF_INET6;
+ else if (sock)
family = sock->sk->sk_family;
- else if (skb && skb->sk)
- family = skb->sk->sk_family;
else
goto out;
@@ -4277,10 +4279,15 @@ 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;
u32 newsid;
u32 peersid;
- err = selinux_skb_peerlbl_sid(skb, sk->sk_family, &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;
if (peersid == SECSID_NULL) {
@@ -4318,9 +4325,14 @@ static void selinux_inet_csk_clone(struct sock *newsk,
static void selinux_inet_conn_established(struct sock *sk,
struct sk_buff *skb)
{
+ u16 family = sk->sk_family;
struct sk_security_struct *sksec = sk->sk_security;
- selinux_skb_peerlbl_sid(skb, sk->sk_family, &sksec->peer_sid);
+ /* handle mapped IPv4 packets arriving via IPv6 sockets */
+ if (family == PF_INET6 && skb->protocol == htons(ETH_P_IP))
+ family = PF_INET;
+
+ selinux_skb_peerlbl_sid(skb, family, &sksec->peer_sid);
}
static void selinux_req_classify_flow(const struct request_sock *req,