linux-kernel - drivers/net/wireguard/device.c:208: undefined reference to `icmpv6_ndo

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Date:   Sun, 23 Feb 2020 08:52:29 +0800
From:   kbuild test robot <lkp@...el.com>
To:     "Jason A. Donenfeld" <zx2c4@...nel.org>
Cc:     kbuild-all@...ts.01.org, linux-kernel@...r.kernel.org
Subject: drivers/net/wireguard/device.c:208: undefined reference to
 `icmpv6_ndo_send'

tree:   https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
head:   0a115e5f23b948be369faf14d3bccab283830f56
commit: a12d7f3cbdc72c7625881c8dc2660fc2c979fdf2 wireguard: device: use icmp_ndo_send helper
date:   9 days ago
config: sparc64-randconfig-a001-20200223 (attached as .config)
compiler: sparc64-linux-gcc (GCC) 7.5.0
reproduce:
        wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross
        chmod +x ~/bin/make.cross
        git checkout a12d7f3cbdc72c7625881c8dc2660fc2c979fdf2
        # save the attached .config to linux build tree
        GCC_VERSION=7.5.0 make.cross ARCH=sparc64 

If you fix the issue, kindly add following tag
Reported-by: kbuild test robot <lkp@...el.com>

All errors (new ones prefixed by >>):

   drivers/net/wireguard/device.o: In function `wg_xmit':
>> drivers/net/wireguard/device.c:208: undefined reference to `icmpv6_ndo_send'

vim +208 drivers/net/wireguard/device.c

   114	
   115	static netdev_tx_t wg_xmit(struct sk_buff *skb, struct net_device *dev)
   116	{
   117		struct wg_device *wg = netdev_priv(dev);
   118		struct sk_buff_head packets;
   119		struct wg_peer *peer;
   120		struct sk_buff *next;
   121		sa_family_t family;
   122		u32 mtu;
   123		int ret;
   124	
   125		if (unlikely(wg_skb_examine_untrusted_ip_hdr(skb) != skb->protocol)) {
   126			ret = -EPROTONOSUPPORT;
   127			net_dbg_ratelimited("%s: Invalid IP packet\n", dev->name);
   128			goto err;
   129		}
   130	
   131		peer = wg_allowedips_lookup_dst(&wg->peer_allowedips, skb);
   132		if (unlikely(!peer)) {
   133			ret = -ENOKEY;
   134			if (skb->protocol == htons(ETH_P_IP))
   135				net_dbg_ratelimited("%s: No peer has allowed IPs matching %pI4\n",
   136						    dev->name, &ip_hdr(skb)->daddr);
   137			else if (skb->protocol == htons(ETH_P_IPV6))
   138				net_dbg_ratelimited("%s: No peer has allowed IPs matching %pI6\n",
   139						    dev->name, &ipv6_hdr(skb)->daddr);
   140			goto err;
   141		}
   142	
   143		family = READ_ONCE(peer->endpoint.addr.sa_family);
   144		if (unlikely(family != AF_INET && family != AF_INET6)) {
   145			ret = -EDESTADDRREQ;
   146			net_dbg_ratelimited("%s: No valid endpoint has been configured or discovered for peer %llu\n",
   147					    dev->name, peer->internal_id);
   148			goto err_peer;
   149		}
   150	
   151		mtu = skb_dst(skb) ? dst_mtu(skb_dst(skb)) : dev->mtu;
   152	
   153		__skb_queue_head_init(&packets);
   154		if (!skb_is_gso(skb)) {
   155			skb_mark_not_on_list(skb);
   156		} else {
   157			struct sk_buff *segs = skb_gso_segment(skb, 0);
   158	
   159			if (unlikely(IS_ERR(segs))) {
   160				ret = PTR_ERR(segs);
   161				goto err_peer;
   162			}
   163			dev_kfree_skb(skb);
   164			skb = segs;
   165		}
   166	
   167		skb_list_walk_safe(skb, skb, next) {
   168			skb_mark_not_on_list(skb);
   169	
   170			skb = skb_share_check(skb, GFP_ATOMIC);
   171			if (unlikely(!skb))
   172				continue;
   173	
   174			/* We only need to keep the original dst around for icmp,
   175			 * so at this point we're in a position to drop it.
   176			 */
   177			skb_dst_drop(skb);
   178	
   179			PACKET_CB(skb)->mtu = mtu;
   180	
   181			__skb_queue_tail(&packets, skb);
   182		}
   183	
   184		spin_lock_bh(&peer->staged_packet_queue.lock);
   185		/* If the queue is getting too big, we start removing the oldest packets
   186		 * until it's small again. We do this before adding the new packet, so
   187		 * we don't remove GSO segments that are in excess.
   188		 */
   189		while (skb_queue_len(&peer->staged_packet_queue) > MAX_STAGED_PACKETS) {
   190			dev_kfree_skb(__skb_dequeue(&peer->staged_packet_queue));
   191			++dev->stats.tx_dropped;
   192		}
   193		skb_queue_splice_tail(&packets, &peer->staged_packet_queue);
   194		spin_unlock_bh(&peer->staged_packet_queue.lock);
   195	
   196		wg_packet_send_staged_packets(peer);
   197	
   198		wg_peer_put(peer);
   199		return NETDEV_TX_OK;
   200	
   201	err_peer:
   202		wg_peer_put(peer);
   203	err:
   204		++dev->stats.tx_errors;
   205		if (skb->protocol == htons(ETH_P_IP))
   206			icmp_ndo_send(skb, ICMP_DEST_UNREACH, ICMP_HOST_UNREACH, 0);
   207		else if (skb->protocol == htons(ETH_P_IPV6))
 > 208			icmpv6_ndo_send(skb, ICMPV6_DEST_UNREACH, ICMPV6_ADDR_UNREACH, 0);
   209		kfree_skb(skb);
   210		return ret;
   211	}
   212	

---
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https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org

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