--- net/ipv4/route.c

+++ net/ipv4/route.c

@@ -2712,6 +2712,11 @@ slow_output:

EXPORT_SYMBOL_GPL(__ip_route_output_key);

+static struct dst_entry *ipv4_blackhole_dst_check(struct dst_entry *dst, u32 cookie)

+{

+ return NULL;

+}

+

static void ipv4_rt_blackhole_update_pmtu(struct dst_entry *dst, u32 mtu)

{

}

@@ -2720,7 +2725,7 @@ static struct dst_ops ipv4_dst_blackhole

.family = AF_INET,

.protocol = cpu_to_be16(ETH_P_IP),

.destroy = ipv4_dst_destroy,

- .check = ipv4_dst_check,

+ .check = ipv4_blackhole_dst_check,

.update_pmtu = ipv4_rt_blackhole_update_pmtu,

.entries = ATOMIC_INIT(0),

};