Hi, Thank you for the patch! Yet something to improve: [auto build test ERROR on linus/master] [also build test ERROR on v5.17-rc1 next-20220128] [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] url: https://github.com/0day-ci/linux/commits/cgel-zte-gmail-com/dvm-use-struct_size-over-open-coded-arithmetic/20220128-160349 base: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git 23a46422c56144939c091c76cf389aa863ce9c18 config: arm-allyesconfig (https://download.01.org/0day-ci/archive/20220129/202201290256.JxMfdzDu-lkp@xxxxxxxxx/config) compiler: arm-linux-gnueabi-gcc (GCC) 11.2.0 reproduce (this is a W=1 build): wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross chmod +x ~/bin/make.cross # https://github.com/0day-ci/linux/commit/6ce283968f032a338616dbe570097f1639a66b75 git remote add linux-review https://github.com/0day-ci/linux git fetch --no-tags linux-review cgel-zte-gmail-com/dvm-use-struct_size-over-open-coded-arithmetic/20220128-160349 git checkout 6ce283968f032a338616dbe570097f1639a66b75 # save the config file to linux build tree mkdir build_dir COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-11.2.0 make.cross O=build_dir ARCH=arm SHELL=/bin/bash If you fix the issue, kindly add following tag as appropriate Reported-by: kernel test robot <lkp@xxxxxxxxx> All errors (new ones prefixed by >>): In file included from include/linux/mm.h:30, from arch/arm/include/asm/cacheflush.h:10, from include/linux/cacheflush.h:5, from include/linux/highmem.h:8, from include/linux/bvec.h:10, from include/linux/skbuff.h:17, from include/linux/if_ether.h:19, from include/linux/etherdevice.h:20, from drivers/net/wireless/intel/iwlwifi/dvm/rx.c:12: drivers/net/wireless/intel/iwlwifi/dvm/rx.c: In function 'iwlagn_rx_noa_notification': >> include/linux/overflow.h:194:32: error: invalid type argument of '->' (have 'struct iwl_wipan_noa_data') 194 | sizeof(*(p)->member) + __must_be_array((p)->member),\ | ^~ drivers/net/wireless/intel/iwlwifi/dvm/rx.c:918:36: note: in expansion of macro 'struct_size' 918 | new_data = kmalloc(struct_size(*new_data, data, len), GFP_ATOMIC); | ^~~~~~~~~~~ In file included from include/linux/container_of.h:5, from include/linux/kernel.h:21, from include/linux/skbuff.h:13, from include/linux/if_ether.h:19, from include/linux/etherdevice.h:20, from drivers/net/wireless/intel/iwlwifi/dvm/rx.c:12: include/linux/overflow.h:194:63: error: invalid type argument of '->' (have 'struct iwl_wipan_noa_data') 194 | sizeof(*(p)->member) + __must_be_array((p)->member),\ | ^~ include/linux/build_bug.h:16:62: note: in definition of macro 'BUILD_BUG_ON_ZERO' 16 | #define BUILD_BUG_ON_ZERO(e) ((int)(sizeof(struct { int:(-!!(e)); }))) | ^ include/linux/compiler.h:258:51: note: in expansion of macro '__same_type' 258 | #define __must_be_array(a) BUILD_BUG_ON_ZERO(__same_type((a), &(a)[0])) | ^~~~~~~~~~~ include/linux/overflow.h:194:44: note: in expansion of macro '__must_be_array' 194 | sizeof(*(p)->member) + __must_be_array((p)->member),\ | ^~~~~~~~~~~~~~~ drivers/net/wireless/intel/iwlwifi/dvm/rx.c:918:36: note: in expansion of macro 'struct_size' 918 | new_data = kmalloc(struct_size(*new_data, data, len), GFP_ATOMIC); | ^~~~~~~~~~~ include/linux/overflow.h:194:63: error: invalid type argument of '->' (have 'struct iwl_wipan_noa_data') 194 | sizeof(*(p)->member) + __must_be_array((p)->member),\ | ^~ include/linux/build_bug.h:16:62: note: in definition of macro 'BUILD_BUG_ON_ZERO' 16 | #define BUILD_BUG_ON_ZERO(e) ((int)(sizeof(struct { int:(-!!(e)); }))) | ^ include/linux/compiler.h:258:51: note: in expansion of macro '__same_type' 258 | #define __must_be_array(a) BUILD_BUG_ON_ZERO(__same_type((a), &(a)[0])) | ^~~~~~~~~~~ include/linux/overflow.h:194:44: note: in expansion of macro '__must_be_array' 194 | sizeof(*(p)->member) + __must_be_array((p)->member),\ | ^~~~~~~~~~~~~~~ drivers/net/wireless/intel/iwlwifi/dvm/rx.c:918:36: note: in expansion of macro 'struct_size' 918 | new_data = kmalloc(struct_size(*new_data, data, len), GFP_ATOMIC); | ^~~~~~~~~~~ include/linux/build_bug.h:16:51: error: bit-field '<anonymous>' width not an integer constant 16 | #define BUILD_BUG_ON_ZERO(e) ((int)(sizeof(struct { int:(-!!(e)); }))) | ^ include/linux/compiler.h:258:33: note: in expansion of macro 'BUILD_BUG_ON_ZERO' 258 | #define __must_be_array(a) BUILD_BUG_ON_ZERO(__same_type((a), &(a)[0])) | ^~~~~~~~~~~~~~~~~ include/linux/overflow.h:194:44: note: in expansion of macro '__must_be_array' 194 | sizeof(*(p)->member) + __must_be_array((p)->member),\ | ^~~~~~~~~~~~~~~ drivers/net/wireless/intel/iwlwifi/dvm/rx.c:918:36: note: in expansion of macro 'struct_size' 918 | new_data = kmalloc(struct_size(*new_data, data, len), GFP_ATOMIC); | ^~~~~~~~~~~ In file included from include/linux/mm.h:30, from arch/arm/include/asm/cacheflush.h:10, from include/linux/cacheflush.h:5, from include/linux/highmem.h:8, from include/linux/bvec.h:10, from include/linux/skbuff.h:17, from include/linux/if_ether.h:19, from include/linux/etherdevice.h:20, from drivers/net/wireless/intel/iwlwifi/dvm/rx.c:12: >> include/linux/overflow.h:195:28: error: invalid type argument of unary '*' (have 'struct iwl_wipan_noa_data') 195 | sizeof(*(p))) | ^~~~ drivers/net/wireless/intel/iwlwifi/dvm/rx.c:918:36: note: in expansion of macro 'struct_size' 918 | new_data = kmalloc(struct_size(*new_data, data, len), GFP_ATOMIC); | ^~~~~~~~~~~ vim +194 include/linux/overflow.h 610b15c50e86eb Kees Cook 2018-05-07 180 610b15c50e86eb Kees Cook 2018-05-07 181 /** 610b15c50e86eb Kees Cook 2018-05-07 182 * struct_size() - Calculate size of structure with trailing array. 610b15c50e86eb Kees Cook 2018-05-07 183 * @p: Pointer to the structure. 610b15c50e86eb Kees Cook 2018-05-07 184 * @member: Name of the array member. b19d57d0f3cc6f Gustavo A. R. Silva 2020-06-08 185 * @count: Number of elements in the array. 610b15c50e86eb Kees Cook 2018-05-07 186 * 610b15c50e86eb Kees Cook 2018-05-07 187 * Calculates size of memory needed for structure @p followed by an b19d57d0f3cc6f Gustavo A. R. Silva 2020-06-08 188 * array of @count number of @member elements. 610b15c50e86eb Kees Cook 2018-05-07 189 * 610b15c50e86eb Kees Cook 2018-05-07 190 * Return: number of bytes needed or SIZE_MAX on overflow. 610b15c50e86eb Kees Cook 2018-05-07 191 */ b19d57d0f3cc6f Gustavo A. R. Silva 2020-06-08 192 #define struct_size(p, member, count) \ b19d57d0f3cc6f Gustavo A. R. Silva 2020-06-08 193 __ab_c_size(count, \ 610b15c50e86eb Kees Cook 2018-05-07 @194 sizeof(*(p)->member) + __must_be_array((p)->member),\ 610b15c50e86eb Kees Cook 2018-05-07 @195 sizeof(*(p))) 610b15c50e86eb Kees Cook 2018-05-07 196 --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@xxxxxxxxxxxx
