ipv4: call __ip_options_echo() in cookie_v4_check()
authorCong Wang <cwang@twopensource.com>
Wed, 15 Oct 2014 21:33:20 +0000 (14:33 -0700)
committerDavid S. Miller <davem@davemloft.net>
Fri, 17 Oct 2014 16:02:57 +0000 (12:02 -0400)
commit 971f10eca186cab238c49da ("tcp: better TCP_SKB_CB layout to reduce cache line misses")
missed that cookie_v4_check() still calls ip_options_echo() which uses
IPCB(). It should use TCPCB() at TCP layer, so call __ip_options_echo()
instead.

Fixes: commit 971f10eca186cab238c49da ("tcp: better TCP_SKB_CB layout to reduce cache line misses")
Cc: Krzysztof Kolasa <kkolasa@winsoft.pl>
Cc: Eric Dumazet <edumazet@google.com>
Reported-by: Krzysztof Kolasa <kkolasa@winsoft.pl>
Tested-by: Krzysztof Kolasa <kkolasa@winsoft.pl>
Signed-off-by: Cong Wang <cwang@twopensource.com>
Signed-off-by: Cong Wang <xiyou.wangcong@gmail.com>
Signed-off-by: Eric Dumazet <edumazet@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
net/ipv4/syncookies.c

index 0431a8f..7e7401c 100644 (file)
@@ -321,7 +321,7 @@ struct sock *cookie_v4_check(struct sock *sk, struct sk_buff *skb,
                int opt_size = sizeof(struct ip_options_rcu) + opt->optlen;
 
                ireq->opt = kmalloc(opt_size, GFP_ATOMIC);
-               if (ireq->opt != NULL && ip_options_echo(&ireq->opt->opt, skb)) {
+               if (ireq->opt != NULL && __ip_options_echo(&ireq->opt->opt, skb, opt)) {
                        kfree(ireq->opt);
                        ireq->opt = NULL;
                }