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Diffstat (limited to 'net/ipv4/route.c')
-rw-r--r--net/ipv4/route.c16
1 files changed, 15 insertions, 1 deletions
diff --git a/net/ipv4/route.c b/net/ipv4/route.c
index a5da63e5faa2..88ce038dd495 100644
--- a/net/ipv4/route.c
+++ b/net/ipv4/route.c
@@ -1185,9 +1185,23 @@ static struct dst_entry *ipv4_dst_check(struct dst_entry *dst, u32 cookie)
1185 1185
1186static void ipv4_link_failure(struct sk_buff *skb) 1186static void ipv4_link_failure(struct sk_buff *skb)
1187{ 1187{
1188 struct ip_options opt;
1188 struct rtable *rt; 1189 struct rtable *rt;
1190 int res;
1189 1191
1190 icmp_send(skb, ICMP_DEST_UNREACH, ICMP_HOST_UNREACH, 0); 1192 /* Recompile ip options since IPCB may not be valid anymore.
1193 */
1194 memset(&opt, 0, sizeof(opt));
1195 opt.optlen = ip_hdr(skb)->ihl*4 - sizeof(struct iphdr);
1196
1197 rcu_read_lock();
1198 res = __ip_options_compile(dev_net(skb->dev), &opt, skb, NULL);
1199 rcu_read_unlock();
1200
1201 if (res)
1202 return;
1203
1204 __icmp_send(skb, ICMP_DEST_UNREACH, ICMP_HOST_UNREACH, 0, &opt);
1191 1205
1192 rt = skb_rtable(skb); 1206 rt = skb_rtable(skb);
1193 if (rt) 1207 if (rt)