[PATCH net 3/6] netfilter: xt_owner: use skb_to_full_sk() helper

[Eric Dumazet]

SYNACK packets might be attached to a request socket,
xt_owner wants to gte the listener in this case.

Fixes: ca6fb0651883 ("tcp: attach SYNACK messages to request sockets instead of 
listener")
Signed-off-by: Eric Dumazet <eduma...@google.com>
---
 net/netfilter/xt_owner.c | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/net/netfilter/xt_owner.c b/net/netfilter/xt_owner.c
index ca2e577ed8ac..1302b475abcb 100644
--- a/net/netfilter/xt_owner.c
+++ b/net/netfilter/xt_owner.c
@@ -14,6 +14,7 @@
 #include <linux/skbuff.h>
 #include <linux/file.h>
 #include <net/sock.h>
+#include <net/inet_sock.h>
 #include <linux/netfilter/x_tables.h>
 #include <linux/netfilter/xt_owner.h>
 
@@ -33,8 +34,9 @@ owner_mt(const struct sk_buff *skb, struct xt_action_param 
*par)
 {
        const struct xt_owner_match_info *info = par->matchinfo;
        const struct file *filp;
+       struct sock *sk = skb_to_full_sk(skb);
 
-       if (skb->sk == NULL || skb->sk->sk_socket == NULL)
+       if (sk == NULL || sk->sk_socket == NULL)
                return (info->match ^ info->invert) == 0;
        else if (info->match & info->invert & XT_OWNER_SOCKET)
                /*
@@ -43,7 +45,7 @@ owner_mt(const struct sk_buff *skb, struct xt_action_param 
*par)
                 */
                return false;
 
-       filp = skb->sk->sk_socket->file;
+       filp = sk->sk_socket->file;
        if (filp == NULL)
                return ((info->match ^ info->invert) &
                       (XT_OWNER_UID | XT_OWNER_GID)) == 0;
-- 
2.6.0.rc2.230.g3dd15c0

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