[netdev-net:master 24/38] net/ipv6/netfilter/nf_conntrack_reasm.c:462: undefined reference to `ipv6_frag_thdr_truncated'

[kernel test robot <lkp@intel.com>]

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tree:   git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net.git master
head:   d5bd32a876c8cb677c9cc88dcc7eb498cd0c9397
commit: 9d9e937b1c8be97b424e3e11938e183fcde905c0 [24/38] ipv6/netfilter: Discard first fragment not including all headers
config: x86_64-randconfig-a012-20201115 (attached as .config)
compiler: gcc-9 (Debian 9.3.0-15) 9.3.0
reproduce (this is a W=1 build):
        # https://git.kernel.org/pub/scm/linux/kernel/git/netdev/net.git/commit/?id=9d9e937b1c8be97b424e3e11938e183fcde905c0
        git remote add netdev-net git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net.git
        git fetch --no-tags netdev-net master
        git checkout 9d9e937b1c8be97b424e3e11938e183fcde905c0
        # save the attached .config to linux build tree
        make W=1 ARCH=x86_64 

If you fix the issue, kindly add following tag as appropriate
Reported-by: kernel test robot <lkp@intel.com>

All errors (new ones prefixed by >>):

   ld: net/ipv6/netfilter/nf_conntrack_reasm.o: in function `nf_ct_frag6_gather':
>> net/ipv6/netfilter/nf_conntrack_reasm.c:462: undefined reference to `ipv6_frag_thdr_truncated'

vim +462 net/ipv6/netfilter/nf_conntrack_reasm.c

   439	
   440	int nf_ct_frag6_gather(struct net *net, struct sk_buff *skb, u32 user)
   441	{
   442		u16 savethdr = skb->transport_header;
   443		u8 nexthdr = NEXTHDR_FRAGMENT;
   444		int fhoff, nhoff, ret;
   445		struct frag_hdr *fhdr;
   446		struct frag_queue *fq;
   447		struct ipv6hdr *hdr;
   448		u8 prevhdr;
   449	
   450		/* Jumbo payload inhibits frag. header */
   451		if (ipv6_hdr(skb)->payload_len == 0) {
   452			pr_debug("payload len = 0\n");
   453			return 0;
   454		}
   455	
   456		if (find_prev_fhdr(skb, &prevhdr, &nhoff, &fhoff) < 0)
   457			return 0;
   458	
   459		/* Discard the first fragment if it does not include all headers
   460		 * RFC 8200, Section 4.5
   461		 */
 > 462		if (ipv6_frag_thdr_truncated(skb, fhoff, &nexthdr)) {
   463			pr_debug("Drop incomplete fragment\n");
   464			return 0;
   465		}
   466	
   467		if (!pskb_may_pull(skb, fhoff + sizeof(*fhdr)))
   468			return -ENOMEM;
   469	
   470		skb_set_transport_header(skb, fhoff);
   471		hdr = ipv6_hdr(skb);
   472		fhdr = (struct frag_hdr *)skb_transport_header(skb);
   473	
   474		skb_orphan(skb);
   475		fq = fq_find(net, fhdr->identification, user, hdr,
   476			     skb->dev ? skb->dev->ifindex : 0);
   477		if (fq == NULL) {
   478			pr_debug("Can't find and can't create new queue\n");
   479			return -ENOMEM;
   480		}
   481	
   482		spin_lock_bh(&fq->q.lock);
   483	
   484		ret = nf_ct_frag6_queue(fq, skb, fhdr, nhoff);
   485		if (ret == -EPROTO) {
   486			skb->transport_header = savethdr;
   487			ret = 0;
   488		}
   489	
   490		spin_unlock_bh(&fq->q.lock);
   491		inet_frag_put(&fq->q);
   492		return ret;
   493	}
   494	EXPORT_SYMBOL_GPL(nf_ct_frag6_gather);
   495	

---
0-DAY CI Kernel Test Service, Intel Corporation
https://lists.01.org/hyperkitty/list/kbuild-all(a)lists.01.org

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