From: Florian Westphal Date: Sat, 26 Jul 2008 09:21:54 +0000 (-0700) Subject: syncookies: Make sure ECN is disabled X-Git-Url: https://git.karo-electronics.de/?a=commitdiff_plain;h=16df845f4566bc252f3e09db12f5c2f22cb44226;p=linux-beck.git syncookies: Make sure ECN is disabled ecn_ok is not initialized when a connection is established by cookies. The cookie syn-ack never sets ECN, so ecn_ok must be set to 0. Spotted using ns-3/network simulation cradle simulator and valgrind. Signed-off-by: Florian Westphal Signed-off-by: David S. Miller --- diff --git a/net/ipv4/syncookies.c b/net/ipv4/syncookies.c index 51bc24d3b8a7..9d38005abbac 100644 --- a/net/ipv4/syncookies.c +++ b/net/ipv4/syncookies.c @@ -299,6 +299,7 @@ struct sock *cookie_v4_check(struct sock *sk, struct sk_buff *skb, ireq->rmt_port = th->source; ireq->loc_addr = ip_hdr(skb)->daddr; ireq->rmt_addr = ip_hdr(skb)->saddr; + ireq->ecn_ok = 0; ireq->snd_wscale = tcp_opt.snd_wscale; ireq->rcv_wscale = tcp_opt.rcv_wscale; ireq->sack_ok = tcp_opt.sack_ok; diff --git a/net/ipv6/syncookies.c b/net/ipv6/syncookies.c index 6a68eeb7bbf8..a46badd1082d 100644 --- a/net/ipv6/syncookies.c +++ b/net/ipv6/syncookies.c @@ -223,6 +223,7 @@ struct sock *cookie_v6_check(struct sock *sk, struct sk_buff *skb) req->expires = 0UL; req->retrans = 0; + ireq->ecn_ok = 0; ireq->snd_wscale = tcp_opt.snd_wscale; ireq->rcv_wscale = tcp_opt.rcv_wscale; ireq->sack_ok = tcp_opt.sack_ok;