tree: https://github.com/0day-ci/linux/commits/UPDATE-20210619-155350/Jhih-Ming... head: ed0359e3fa64928e48021387a694f211bc840ff7 commit: ed0359e3fa64928e48021387a694f211bc840ff7 rtw_security: fix cast to restricted __le32 date: 2 days ago config: x86_64-randconfig-a013-20210621 (attached as .config) compiler: clang version 13.0.0 (https://github.com/llvm/llvm-project e1adf90826a57b674eee79b071fb46c1f5683cd0) 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 # install x86_64 cross compiling tool for clang build # apt-get install binutils-x86-64-linux-gnu # https://github.com/0day-ci/linux/commit/ed0359e3fa64928e48021387a694f211b... git remote add linux-review https://github.com/0day-ci/linux git fetch --no-tags linux-review UPDATE-20210619-155350/Jhih-Ming-Huang/rtw_security-fix-cast-to-restricted-__le32/20210616-131056 git checkout ed0359e3fa64928e48021387a694f211bc840ff7 # save the attached .config to linux build tree COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross ARCH=x86_64 If you fix the issue, kindly add following tag as appropriate Reported-by: kernel test robot <lkp(a)intel.com&gt; All warnings (new ones prefixed by >>): __le32 crc; ^ 1 warning generated. vim +/crc +95 drivers/staging/rtl8723bs/core/rtw_security.c 91 92 void rtw_wep_decrypt(struct adapter *padapter, u8 *precvframe) 93 { 94 /* exclude ICV */ 96 signed int length; 97 u32 keylength; 98 u8 *pframe, *payload, *iv, wepkey[16]; 99 u8 keyindex; 100 struct rx_pkt_attrib *prxattrib = &(((union recv_frame *)precvframe)->u.hdr.attrib); 101 struct security_priv *psecuritypriv = &padapter->securitypriv; 102 struct arc4_ctx *ctx = &psecuritypriv->recv_arc4_ctx; 103 104 pframe = (unsigned char *)((union recv_frame *)precvframe)->u.hdr.rx_data; 105 106 /* start to decrypt recvframe */ 107 if ((prxattrib->encrypt == _WEP40_) || (prxattrib->encrypt == _WEP104_)) { 108 iv = pframe+prxattrib->hdrlen; 109 /* keyindex =(iv[3]&0x3); */ 110 keyindex = prxattrib->key_index; 111 keylength = psecuritypriv->dot11DefKeylen[keyindex]; 112 memcpy(&wepkey[0], iv, 3); 113 /* memcpy(&wepkey[3], &psecuritypriv->dot11DefKey[psecuritypriv->dot11PrivacyKeyIndex].skey[0], keylength); */ 114 memcpy(&wepkey[3], &psecuritypriv->dot11DefKey[keyindex].skey[0], keylength); 115 length = ((union recv_frame *)precvframe)->u.hdr.len-prxattrib->hdrlen-prxattrib->iv_len; 116 117 payload = pframe+prxattrib->iv_len+prxattrib->hdrlen; 118 119 /* decrypt payload include icv */ 120 arc4_setkey(ctx, wepkey, 3 + keylength); 121 arc4_crypt(ctx, payload, payload, length); 122 123 /* calculate icv and compare the icv */ 124 crc = cpu_to_le32(~crc32_le(~0, payload, length - 4)); 125 126 } 127 } 128 --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org