[TCP]: Handle lack of cached dst in tcp_init_cwnd().

2ecefe4d · David S. Miller · efcf40ab · 2ecefe4d
Commit 2ecefe4d authored Jun 26, 2003 by David S. Miller
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net/ipv4/tcp_input.c net/ipv4/tcp_input.c +1 -1

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--- a/net/ipv4/tcp_input.c
+++ b/net/ipv4/tcp_input.c
@@ -601,7 +601,7 @@ void tcp_update_metrics(struct sock *sk)
 /* Numbers are taken from RFC2414.  */
 __u32 tcp_init_cwnd(struct tcp_opt *tp, struct dst_entry *dst)
 {
-	__u32 cwnd = dst_metric(dst, RTAX_INITCWND);
+	__u32 cwnd = (dst ? dst_metric(dst, RTAX_INITCWND) : 0);

 	if (!cwnd) {
 		if (tp->mss_cache > 1460)