Re: [PATCH bpf-next v1 2/7] bpf: Support kptrs in local storage maps

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

Hi Kumar,

Thank you for the patch! Perhaps something to improve:

[auto build test WARNING on 168de0233586fb06c5c5c56304aa9a928a09b0ba]

url:    https://github.com/intel-lab-lkp/linux/commits/Kumar-Kartikeya-Dwivedi/bpf-Support-kptrs-in-percpu-hashmap-and-percpu-LRU-hashmap/20230219-235406
base:   168de0233586fb06c5c5c56304aa9a928a09b0ba
patch link:    https://lore.kernel.org/r/20230219155249.1755998-3-memxor%40gmail.com
patch subject: [PATCH bpf-next v1 2/7] bpf: Support kptrs in local storage maps
config: nios2-randconfig-s043-20230219 (https://download.01.org/0day-ci/archive/20230220/202302201347.KsT4rWrN-lkp@intel.com/config)
compiler: nios2-linux-gcc (GCC) 12.1.0
reproduce:
        wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross
        chmod +x ~/bin/make.cross
        # apt-get install sparse
        # sparse version: v0.6.4-39-gce1a6720-dirty
        # https://github.com/intel-lab-lkp/linux/commit/01f54156de471b78c6355e9aba9860afaf61cedb
        git remote add linux-review https://github.com/intel-lab-lkp/linux
        git fetch --no-tags linux-review Kumar-Kartikeya-Dwivedi/bpf-Support-kptrs-in-percpu-hashmap-and-percpu-LRU-hashmap/20230219-235406
        git checkout 01f54156de471b78c6355e9aba9860afaf61cedb
        # save the config file
        mkdir build_dir && cp config build_dir/.config
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-12.1.0 make.cross C=1 CF='-fdiagnostic-prefix -D__CHECK_ENDIAN__' O=build_dir ARCH=nios2 olddefconfig
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-12.1.0 make.cross C=1 CF='-fdiagnostic-prefix -D__CHECK_ENDIAN__' O=build_dir ARCH=nios2 SHELL=/bin/bash kernel/bpf/

If you fix the issue, kindly add following tag where applicable
| Reported-by: kernel test robot <lkp@intel.com>
| Link: https://lore.kernel.org/oe-kbuild-all/202302201347.KsT4rWrN-lkp@intel.com/

sparse warnings: (new ones prefixed by >>)
>> kernel/bpf/bpf_local_storage.c:107:41: sparse: sparse: dereference of noderef expression

vim +107 kernel/bpf/bpf_local_storage.c

   101	
   102	static void bpf_selem_free_rcu(struct rcu_head *rcu)
   103	{
   104		struct bpf_local_storage_elem *selem;
   105	
   106		selem = container_of(rcu, struct bpf_local_storage_elem, rcu);
 > 107		bpf_obj_free_fields(SDATA(selem)->smap->map.record, SDATA(selem));
   108		kfree(selem);
   109	}
   110	

-- 
0-DAY CI Kernel Test Service
https://github.com/intel/lkp-tests