[TCP]: 'dst' can be NULL in tcp_rto_min()

Reported by Rick Jones. Signed-off-by: David S. Miller <davem@davemloft.net>
mariux64 · Aug 31, 2007 · 5c127c5 · 5c127c5
1 parent 88282c6
commit 5c127c5
Showing 1 changed file with 1 addition and 1 deletion.
diff --git a/net/ipv4/tcp_input.c b/net/ipv4/tcp_input.c
@@ -560,7 +560,7 @@ static u32 tcp_rto_min(struct sock *sk)
 	struct dst_entry *dst = __sk_dst_get(sk);
 	u32 rto_min = TCP_RTO_MIN;
 
-	if (dst_metric_locked(dst, RTAX_RTO_MIN))
+	if (dst && dst_metric_locked(dst, RTAX_RTO_MIN))
 		rto_min = dst->metrics[RTAX_RTO_MIN-1];
 	return rto_min;
 }