tree: https://github.com/0day-ci/linux/commits/UPDATE-20210116-045420/Tony-Luck... head: 12eccb268478ec9d85f923d1537aa264e45efd68 commit: 12eccb268478ec9d85f923d1537aa264e45efd68 x86/mce: Avoid infinite loop for copy from user recovery date: 3 hours ago config: x86_64-randconfig-r014-20210115 (attached as .config) compiler: clang version 12.0.0 (https://github.com/llvm/llvm-project 5b42fd8dd4e7e29125a09a41a33af7c9cb57d144) 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/12eccb268478ec9d85f923d1537aa264e... git remote add linux-review https://github.com/0day-ci/linux git fetch --no-tags linux-review UPDATE-20210116-045420/Tony-Luck/x86-mce-Avoid-infinite-loop-for-copy-from-user-recovery/20210115-113535 git checkout 12eccb268478ec9d85f923d1537aa264e45efd68 # 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 errors (new ones prefixed by >>): p->mce_count = 0; ^ 1 error generated. vim +/p +1253 arch/x86/kernel/cpu/mce/core.c 1250 1251 static void kill_me_now(struct callback_head *ch) 1252 { 1254 force_sig(SIGBUS); 1255 } 1256 --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org