net/netfilter/nf_bpf_link.c:186:33: warning: bitwise operation between different enumeration types ('enum bpf_reg_type' and 'enum bpf_type_flag')

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

tree:   https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
head:   87adedeba51a822533649b143232418b9e26d08b
commit: fd9c663b9ad67dedfc9a3fd3429ddd3e83782b4d bpf: minimal support for programs hooked into netfilter framework
date:   10 months ago
config: riscv-defconfig (https://download.01.org/0day-ci/archive/20240301/202403010842.hhJY5TFK-lkp@intel.com/config)
compiler: clang version 19.0.0git (https://github.com/llvm/llvm-project edd4aee4dd9b5b98b2576a6f783e4086173d902a)
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20240301/202403010842.hhJY5TFK-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/202403010842.hhJY5TFK-lkp@intel.com/

All warnings (new ones prefixed by >>):

   In file included from net/netfilter/nf_bpf_link.c:2:
   In file included from include/linux/bpf.h:21:
   In file included from include/linux/kallsyms.h:13:
   In file included from include/linux/mm.h:1970:
   include/linux/vmstat.h:516:36: warning: arithmetic between different enumeration types ('enum node_stat_item' and 'enum lru_list') [-Wenum-enum-conversion]
     516 |         return node_stat_name(NR_LRU_BASE + lru) + 3; // skip "nr_"
         |                               ~~~~~~~~~~~ ^ ~~~
   In file included from net/netfilter/nf_bpf_link.c:2:
   include/linux/bpf.h:706:48: warning: bitwise operation between different enumeration types ('enum bpf_type_flag' and 'enum bpf_arg_type') [-Wenum-enum-conversion]
     706 |         ARG_PTR_TO_MAP_VALUE_OR_NULL    = PTR_MAYBE_NULL | ARG_PTR_TO_MAP_VALUE,
         |                                           ~~~~~~~~~~~~~~ ^ ~~~~~~~~~~~~~~~~~~~~
   include/linux/bpf.h:707:43: warning: bitwise operation between different enumeration types ('enum bpf_type_flag' and 'enum bpf_arg_type') [-Wenum-enum-conversion]
     707 |         ARG_PTR_TO_MEM_OR_NULL          = PTR_MAYBE_NULL | ARG_PTR_TO_MEM,
         |                                           ~~~~~~~~~~~~~~ ^ ~~~~~~~~~~~~~~
   include/linux/bpf.h:708:43: warning: bitwise operation between different enumeration types ('enum bpf_type_flag' and 'enum bpf_arg_type') [-Wenum-enum-conversion]
     708 |         ARG_PTR_TO_CTX_OR_NULL          = PTR_MAYBE_NULL | ARG_PTR_TO_CTX,
         |                                           ~~~~~~~~~~~~~~ ^ ~~~~~~~~~~~~~~
   include/linux/bpf.h:709:45: warning: bitwise operation between different enumeration types ('enum bpf_type_flag' and 'enum bpf_arg_type') [-Wenum-enum-conversion]
     709 |         ARG_PTR_TO_SOCKET_OR_NULL       = PTR_MAYBE_NULL | ARG_PTR_TO_SOCKET,
         |                                           ~~~~~~~~~~~~~~ ^ ~~~~~~~~~~~~~~~~~
   include/linux/bpf.h:710:44: warning: bitwise operation between different enumeration types ('enum bpf_type_flag' and 'enum bpf_arg_type') [-Wenum-enum-conversion]
     710 |         ARG_PTR_TO_STACK_OR_NULL        = PTR_MAYBE_NULL | ARG_PTR_TO_STACK,
         |                                           ~~~~~~~~~~~~~~ ^ ~~~~~~~~~~~~~~~~
   include/linux/bpf.h:711:45: warning: bitwise operation between different enumeration types ('enum bpf_type_flag' and 'enum bpf_arg_type') [-Wenum-enum-conversion]
     711 |         ARG_PTR_TO_BTF_ID_OR_NULL       = PTR_MAYBE_NULL | ARG_PTR_TO_BTF_ID,
         |                                           ~~~~~~~~~~~~~~ ^ ~~~~~~~~~~~~~~~~~
   include/linux/bpf.h:715:38: warning: bitwise operation between different enumeration types ('enum bpf_type_flag' and 'enum bpf_arg_type') [-Wenum-enum-conversion]
     715 |         ARG_PTR_TO_UNINIT_MEM           = MEM_UNINIT | ARG_PTR_TO_MEM,
         |                                           ~~~~~~~~~~ ^ ~~~~~~~~~~~~~~
   include/linux/bpf.h:717:45: warning: bitwise operation between different enumeration types ('enum bpf_type_flag' and 'enum bpf_arg_type') [-Wenum-enum-conversion]
     717 |         ARG_PTR_TO_FIXED_SIZE_MEM       = MEM_FIXED_SIZE | ARG_PTR_TO_MEM,
         |                                           ~~~~~~~~~~~~~~ ^ ~~~~~~~~~~~~~~
   include/linux/bpf.h:740:48: warning: bitwise operation between different enumeration types ('enum bpf_type_flag' and 'enum bpf_return_type') [-Wenum-enum-conversion]
     740 |         RET_PTR_TO_MAP_VALUE_OR_NULL    = PTR_MAYBE_NULL | RET_PTR_TO_MAP_VALUE,
         |                                           ~~~~~~~~~~~~~~ ^ ~~~~~~~~~~~~~~~~~~~~
   include/linux/bpf.h:741:45: warning: bitwise operation between different enumeration types ('enum bpf_type_flag' and 'enum bpf_return_type') [-Wenum-enum-conversion]
     741 |         RET_PTR_TO_SOCKET_OR_NULL       = PTR_MAYBE_NULL | RET_PTR_TO_SOCKET,
         |                                           ~~~~~~~~~~~~~~ ^ ~~~~~~~~~~~~~~~~~
   include/linux/bpf.h:742:47: warning: bitwise operation between different enumeration types ('enum bpf_type_flag' and 'enum bpf_return_type') [-Wenum-enum-conversion]
     742 |         RET_PTR_TO_TCP_SOCK_OR_NULL     = PTR_MAYBE_NULL | RET_PTR_TO_TCP_SOCK,
         |                                           ~~~~~~~~~~~~~~ ^ ~~~~~~~~~~~~~~~~~~~
   include/linux/bpf.h:743:50: warning: bitwise operation between different enumeration types ('enum bpf_type_flag' and 'enum bpf_return_type') [-Wenum-enum-conversion]
     743 |         RET_PTR_TO_SOCK_COMMON_OR_NULL  = PTR_MAYBE_NULL | RET_PTR_TO_SOCK_COMMON,
         |                                           ~~~~~~~~~~~~~~ ^ ~~~~~~~~~~~~~~~~~~~~~~
   include/linux/bpf.h:745:49: warning: bitwise operation between different enumeration types ('enum bpf_type_flag' and 'enum bpf_return_type') [-Wenum-enum-conversion]
     745 |         RET_PTR_TO_DYNPTR_MEM_OR_NULL   = PTR_MAYBE_NULL | RET_PTR_TO_MEM,
         |                                           ~~~~~~~~~~~~~~ ^ ~~~~~~~~~~~~~~
   include/linux/bpf.h:746:45: warning: bitwise operation between different enumeration types ('enum bpf_type_flag' and 'enum bpf_return_type') [-Wenum-enum-conversion]
     746 |         RET_PTR_TO_BTF_ID_OR_NULL       = PTR_MAYBE_NULL | RET_PTR_TO_BTF_ID,
         |                                           ~~~~~~~~~~~~~~ ^ ~~~~~~~~~~~~~~~~~
   include/linux/bpf.h:747:43: warning: bitwise operation between different enumeration types ('enum bpf_type_flag' and 'enum bpf_return_type') [-Wenum-enum-conversion]
     747 |         RET_PTR_TO_BTF_ID_TRUSTED       = PTR_TRUSTED    | RET_PTR_TO_BTF_ID,
         |                                           ~~~~~~~~~~~    ^ ~~~~~~~~~~~~~~~~~
   include/linux/bpf.h:858:44: warning: bitwise operation between different enumeration types ('enum bpf_type_flag' and 'enum bpf_reg_type') [-Wenum-enum-conversion]
     858 |         PTR_TO_MAP_VALUE_OR_NULL        = PTR_MAYBE_NULL | PTR_TO_MAP_VALUE,
         |                                           ~~~~~~~~~~~~~~ ^ ~~~~~~~~~~~~~~~~
   include/linux/bpf.h:859:42: warning: bitwise operation between different enumeration types ('enum bpf_type_flag' and 'enum bpf_reg_type') [-Wenum-enum-conversion]
     859 |         PTR_TO_SOCKET_OR_NULL           = PTR_MAYBE_NULL | PTR_TO_SOCKET,
         |                                           ~~~~~~~~~~~~~~ ^ ~~~~~~~~~~~~~
   include/linux/bpf.h:860:46: warning: bitwise operation between different enumeration types ('enum bpf_type_flag' and 'enum bpf_reg_type') [-Wenum-enum-conversion]
     860 |         PTR_TO_SOCK_COMMON_OR_NULL      = PTR_MAYBE_NULL | PTR_TO_SOCK_COMMON,
         |                                           ~~~~~~~~~~~~~~ ^ ~~~~~~~~~~~~~~~~~~
   include/linux/bpf.h:861:44: warning: bitwise operation between different enumeration types ('enum bpf_type_flag' and 'enum bpf_reg_type') [-Wenum-enum-conversion]
     861 |         PTR_TO_TCP_SOCK_OR_NULL         = PTR_MAYBE_NULL | PTR_TO_TCP_SOCK,
         |                                           ~~~~~~~~~~~~~~ ^ ~~~~~~~~~~~~~~~
   include/linux/bpf.h:862:42: warning: bitwise operation between different enumeration types ('enum bpf_type_flag' and 'enum bpf_reg_type') [-Wenum-enum-conversion]
     862 |         PTR_TO_BTF_ID_OR_NULL           = PTR_MAYBE_NULL | PTR_TO_BTF_ID,
         |                                           ~~~~~~~~~~~~~~ ^ ~~~~~~~~~~~~~
>> net/netfilter/nf_bpf_link.c:186:33: warning: bitwise operation between different enumeration types ('enum bpf_reg_type' and 'enum bpf_type_flag') [-Wenum-enum-conversion]
     186 |         info->reg_type = PTR_TO_BTF_ID | PTR_TRUSTED;
         |                          ~~~~~~~~~~~~~ ^ ~~~~~~~~~~~
   22 warnings generated.


vim +186 net/netfilter/nf_bpf_link.c

   170	
   171	static bool nf_ptr_to_btf_id(struct bpf_insn_access_aux *info, const char *name)
   172	{
   173		struct btf *btf;
   174		s32 type_id;
   175	
   176		btf = bpf_get_btf_vmlinux();
   177		if (IS_ERR_OR_NULL(btf))
   178			return false;
   179	
   180		type_id = btf_find_by_name_kind(btf, name, BTF_KIND_STRUCT);
   181		if (WARN_ON_ONCE(type_id < 0))
   182			return false;
   183	
   184		info->btf = btf;
   185		info->btf_id = type_id;
 > 186		info->reg_type = PTR_TO_BTF_ID | PTR_TRUSTED;
   187		return true;
   188	}
   189	

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