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smack: use skb_to_full_sk() helper 

This module wants to access sk->sk_security, which is not
available for request sockets.

Fixes: ca6fb06518 ("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>
This commit is contained in:
Eric Dumazet 2015-11-08 10:54:08 -08:00 committed by David S. Miller
parent 54abc686c2
commit 8827d90e29
1 changed files with 7 additions and 4 deletions
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11
security/smack/smack_netfilter.c
View File

@ -17,6 +17,7 @@
#include <linux/netfilter_ipv4.h>
#include <linux/netfilter_ipv6.h>
#include <linux/netdevice.h>
#include <net/inet_sock.h>
#include "smack.h"
#if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
@ -25,11 +26,12 @@ static unsigned int smack_ipv6_output(void *priv,
struct sk_buff *skb,
const struct nf_hook_state *state)
{
struct sock *sk = skb_to_full_sk(skb);
struct socket_smack *ssp;
struct smack_known *skp;
if (skb && skb->sk && skb->sk->sk_security) {
ssp = skb->sk->sk_security;
if (sk && sk->sk_security) {
ssp = sk->sk_security;
skp = ssp->smk_out;
skb->secmark = skp->smk_secid;
}
@ -42,11 +44,12 @@ static unsigned int smack_ipv4_output(void *priv,
struct sk_buff *skb,
const struct nf_hook_state *state)
{
struct sock *sk = skb_to_full_sk(skb);
struct socket_smack *ssp;
struct smack_known *skp;
if (skb && skb->sk && skb->sk->sk_security) {
ssp = skb->sk->sk_security;
if (sk && sk->sk_security) {
ssp = sk->sk_security;
skp = ssp->smk_out;
skb->secmark = skp->smk_secid;
}