tcp: use IPCB instead of TCP_SKB_CB in inet_exact_dif_match()

After this fix : ("tcp: add tcp_v4_fill_cb()/tcp_v4_restore_cb()"), socket lookups happen while skb->cb[] has not been mangled yet by TCP. Fixes: a04a480 ("net: Require exact match for TCP socket lookups if dif is l3mdev") Signed-off-by: David Ahern <[email protected]> Signed-off-by: Eric Dumazet <[email protected]> Signed-off-by: David S. Miller <[email protected]>
ambv · Dec 3, 2017 · b4d1605 · b4d1605
1 parent eeea10b
commit b4d1605
Showing 1 changed file with 1 addition and 2 deletions.
diff --git a/include/net/tcp.h b/include/net/tcp.h
@@ -844,12 +844,11 @@ static inline int tcp_v6_sdif(const struct sk_buff *skb)
 }
 #endif
 
-/* TCP_SKB_CB reference means this can not be used from early demux */
 static inline bool inet_exact_dif_match(struct net *net, struct sk_buff *skb)
 {
 #if IS_ENABLED(CONFIG_NET_L3_MASTER_DEV)
 	if (!net->ipv4.sysctl_tcp_l3mdev_accept &&
-	    skb && ipv4_l3mdev_skb(TCP_SKB_CB(skb)->header.h4.flags))
+	    skb && ipv4_l3mdev_skb(IPCB(skb)->flags))
 		return true;
 #endif
 	return false;