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authorEric Dumazet <edumazet@google.com>2015-11-08 10:54:07 -0800
committerDavid S. Miller <davem@davemloft.net>2015-11-08 20:56:38 -0500
commit54abc686c2d111e98228943a7e1e51cc256e35d9 (patch)
tree5ce71817a67798bdd4a669a63b110d83952c2feb /security
parentfb9a10d9d8552acf6f9dee2ecb2d047777821d8b (diff)
downloadlinux-linaro-stable-54abc686c2d111e98228943a7e1e51cc256e35d9.tar.gz
net: add skb_to_full_sk() helper and use it in selinux_netlbl_skbuff_setsid()
Generalize selinux_skb_sk() added in commit 212cd0895330 ("selinux: fix random read in selinux_ip_postroute_compat()") so that we can use it other contexts. Use it right away in selinux_netlbl_skbuff_setsid() Fixes: ca6fb0651883 ("tcp: attach SYNACK messages to request sockets instead of listener") Signed-off-by: Eric Dumazet <edumazet@google.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'security')
-rw-r--r--security/selinux/hooks.c16
-rw-r--r--security/selinux/netlabel.c2
2 files changed, 3 insertions, 15 deletions
diff --git a/security/selinux/hooks.c b/security/selinux/hooks.c
index c9b2d5467477..23307da15f1d 100644
--- a/security/selinux/hooks.c
+++ b/security/selinux/hooks.c
@@ -4931,23 +4931,11 @@ static unsigned int selinux_ipv4_output(void *priv,
return selinux_ip_output(skb, PF_INET);
}
-/* SYNACK messages might be attached to request sockets.
- * To get back to sk_security, we need to look at the listener.
- */
-static struct sock *selinux_skb_sk(const struct sk_buff *skb)
-{
- struct sock *sk = skb->sk;
-
- if (sk && sk->sk_state == TCP_NEW_SYN_RECV)
- sk = inet_reqsk(sk)->rsk_listener;
- return sk;
-}
-
static unsigned int selinux_ip_postroute_compat(struct sk_buff *skb,
int ifindex,
u16 family)
{
- struct sock *sk = selinux_skb_sk(skb);
+ struct sock *sk = skb_to_full_sk(skb);
struct sk_security_struct *sksec;
struct common_audit_data ad;
struct lsm_network_audit net = {0,};
@@ -5002,7 +4990,7 @@ static unsigned int selinux_ip_postroute(struct sk_buff *skb,
if (!secmark_active && !peerlbl_active)
return NF_ACCEPT;
- sk = selinux_skb_sk(skb);
+ sk = skb_to_full_sk(skb);
#ifdef CONFIG_XFRM
/* If skb->dst->xfrm is non-NULL then the packet is undergoing an IPsec
diff --git a/security/selinux/netlabel.c b/security/selinux/netlabel.c
index 0364120d1ec8..1f989a539fd4 100644
--- a/security/selinux/netlabel.c
+++ b/security/selinux/netlabel.c
@@ -245,7 +245,7 @@ int selinux_netlbl_skbuff_setsid(struct sk_buff *skb,
/* if this is a locally generated packet check to see if it is already
* being labeled by it's parent socket, if it is just exit */
- sk = skb->sk;
+ sk = skb_to_full_sk(skb);
if (sk != NULL) {
struct sk_security_struct *sksec = sk->sk_security;
if (sksec->nlbl_state != NLBL_REQSKB)