CC: Linux Memory Management List <linux-mm(a)kvack.org&gt; TO: Luiz Sampaio <sampaio.ime(a)gmail.com&gt; CC: Miguel Ojeda <ojeda(a)kernel.org&gt; tree: https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git master head: 4eee8d0b64ecc3231040fa68ba750317ffca5c52 commit: 4daa9ff89ef27be43c15995412d6aee393a78200 [2637/5842] auxdisplay: charlcd: checking for pointer reference before dereferencing config: x86_64-randconfig-a015-20211205 (https://download.01.org/0day-ci/archive/20211210/202112101807.jvagJ8rt-lk...) compiler: clang version 14.0.0 (https://github.com/llvm/llvm-project 5f1d1854eb1450d352663ee732235893c5782237) 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://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git/commi... git remote add linux-next https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git git fetch --no-tags linux-next master git checkout 4daa9ff89ef27be43c15995412d6aee393a78200 # save the config file to linux build tree mkdir build_dir COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross W=1 O=build_dir ARCH=x86_64 SHELL=/bin/bash crypto// drivers/ 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 >>): --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org