Re: [PATCH nf-next 1/2] netfilter: nf_conntrack: don't rely on implicit includes

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

Hi Florian,

kernel test robot noticed the following build errors:

[auto build test ERROR on netfilter-nf/main]
[also build test ERROR on pcmoore-audit/next next-20260108]
[cannot apply to nf-next/master linus/master v6.16-rc1]
[If your patch is applied to the wrong git tree, kindly drop us a note.
And when submitting patch, we suggest to use '--base' as documented in
https://git-scm.com/docs/git-format-patch#_base_tree_information]

url:    https://github.com/intel-lab-lkp/linux/commits/Florian-Westphal/netfilter-nf_conntrack-don-t-rely-on-implicit-includes/20260108-012311
base:   https://git.kernel.org/pub/scm/linux/kernel/git/netfilter/nf.git main
patch link:    https://lore.kernel.org/r/20260107152548.31769-2-fw%40strlen.de
patch subject: [PATCH nf-next 1/2] netfilter: nf_conntrack: don't rely on implicit includes
config: x86_64-rhel-9.4-bpf (https://download.01.org/0day-ci/archive/20260108/202601081929.C2oDWexU-lkp@intel.com/config)
compiler: gcc-14 (Debian 14.2.0-19) 14.2.0
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20260108/202601081929.C2oDWexU-lkp@intel.com/reproduce)

If you fix the issue in a separate patch/commit (i.e. not just a new version of
the same patch/commit), kindly add following tags
| Reported-by: kernel test robot <lkp@intel.com>
| Closes: https://lore.kernel.org/oe-kbuild-all/202601081929.C2oDWexU-lkp@intel.com/

All errors (new ones prefixed by >>):

   net/netfilter/nf_conntrack_bpf.c: In function 'bpf_skb_ct_alloc':
>> net/netfilter/nf_conntrack_bpf.c:367:46: error: implicit declaration of function 'sock_net'; did you mean 'check_net'? [-Wimplicit-function-declaration]
     367 |         net = skb->dev ? dev_net(skb->dev) : sock_net(skb->sk);
         |                                              ^~~~~~~~
         |                                              check_net
>> net/netfilter/nf_conntrack_bpf.c:367:44: error: pointer/integer type mismatch in conditional expression [-Wint-conversion]
     367 |         net = skb->dev ? dev_net(skb->dev) : sock_net(skb->sk);
         |                                            ^
   net/netfilter/nf_conntrack_bpf.c: In function 'bpf_skb_ct_lookup':
   net/netfilter/nf_conntrack_bpf.c:402:51: error: pointer/integer type mismatch in conditional expression [-Wint-conversion]
     402 |         caller_net = skb->dev ? dev_net(skb->dev) : sock_net(skb->sk);
         |                                                   ^


vim +367 net/netfilter/nf_conntrack_bpf.c

b4c2b9593a1c4c Kumar Kartikeya Dwivedi 2022-01-14  343  
d7e79c97c00ca8 Lorenzo Bianconi        2022-07-21  344  /* bpf_skb_ct_alloc - Allocate a new CT entry
d7e79c97c00ca8 Lorenzo Bianconi        2022-07-21  345   *
d7e79c97c00ca8 Lorenzo Bianconi        2022-07-21  346   * Parameters:
d7e79c97c00ca8 Lorenzo Bianconi        2022-07-21  347   * @skb_ctx	- Pointer to ctx (__sk_buff) in TC program
d7e79c97c00ca8 Lorenzo Bianconi        2022-07-21  348   *		    Cannot be NULL
d7e79c97c00ca8 Lorenzo Bianconi        2022-07-21  349   * @bpf_tuple	- Pointer to memory representing the tuple to look up
d7e79c97c00ca8 Lorenzo Bianconi        2022-07-21  350   *		    Cannot be NULL
d7e79c97c00ca8 Lorenzo Bianconi        2022-07-21  351   * @tuple__sz	- Length of the tuple structure
d7e79c97c00ca8 Lorenzo Bianconi        2022-07-21  352   *		    Must be one of sizeof(bpf_tuple->ipv4) or
d7e79c97c00ca8 Lorenzo Bianconi        2022-07-21  353   *		    sizeof(bpf_tuple->ipv6)
d7e79c97c00ca8 Lorenzo Bianconi        2022-07-21  354   * @opts	- Additional options for allocation (documented above)
d7e79c97c00ca8 Lorenzo Bianconi        2022-07-21  355   *		    Cannot be NULL
d7e79c97c00ca8 Lorenzo Bianconi        2022-07-21  356   * @opts__sz	- Length of the bpf_ct_opts structure
ece4b296904167 Brad Cowie              2024-05-22  357   *		    Must be NF_BPF_CT_OPTS_SZ (16) or 12
d7e79c97c00ca8 Lorenzo Bianconi        2022-07-21  358   */
400031e05adfce David Vernet            2023-02-01  359  __bpf_kfunc struct nf_conn___init *
d7e79c97c00ca8 Lorenzo Bianconi        2022-07-21  360  bpf_skb_ct_alloc(struct __sk_buff *skb_ctx, struct bpf_sock_tuple *bpf_tuple,
d7e79c97c00ca8 Lorenzo Bianconi        2022-07-21  361  		 u32 tuple__sz, struct bpf_ct_opts *opts, u32 opts__sz)
d7e79c97c00ca8 Lorenzo Bianconi        2022-07-21  362  {
d7e79c97c00ca8 Lorenzo Bianconi        2022-07-21  363  	struct sk_buff *skb = (struct sk_buff *)skb_ctx;
d7e79c97c00ca8 Lorenzo Bianconi        2022-07-21  364  	struct nf_conn *nfct;
d7e79c97c00ca8 Lorenzo Bianconi        2022-07-21  365  	struct net *net;
d7e79c97c00ca8 Lorenzo Bianconi        2022-07-21  366  
d7e79c97c00ca8 Lorenzo Bianconi        2022-07-21 @367  	net = skb->dev ? dev_net(skb->dev) : sock_net(skb->sk);
d7e79c97c00ca8 Lorenzo Bianconi        2022-07-21  368  	nfct = __bpf_nf_ct_alloc_entry(net, bpf_tuple, tuple__sz, opts, opts__sz, 10);
d7e79c97c00ca8 Lorenzo Bianconi        2022-07-21  369  	if (IS_ERR(nfct)) {
d7e79c97c00ca8 Lorenzo Bianconi        2022-07-21  370  		if (opts)
d7e79c97c00ca8 Lorenzo Bianconi        2022-07-21  371  			opts->error = PTR_ERR(nfct);
d7e79c97c00ca8 Lorenzo Bianconi        2022-07-21  372  		return NULL;
d7e79c97c00ca8 Lorenzo Bianconi        2022-07-21  373  	}
d7e79c97c00ca8 Lorenzo Bianconi        2022-07-21  374  
d7e79c97c00ca8 Lorenzo Bianconi        2022-07-21  375  	return (struct nf_conn___init *)nfct;
d7e79c97c00ca8 Lorenzo Bianconi        2022-07-21  376  }
d7e79c97c00ca8 Lorenzo Bianconi        2022-07-21  377  

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