tree: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master head: 142b507f911c5a502dbb8f603216cb0ea8a79a48 commit: 7ba3d1cdb7988ccfbc6e4995dee04510c85fefbc smb3.1.1: allow dumping keys for multiuser mounts date: 7 days ago config: arm-randconfig-s031-20210510 (attached as .config) compiler: arm-linux-gnueabi-gcc (GCC) 9.3.0 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: v0.6.3-341-g8af24329-dirty # https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit... git remote add linus https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git git fetch --no-tags linus master git checkout 7ba3d1cdb7988ccfbc6e4995dee04510c85fefbc # save the attached .config to linux build tree COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-9.3.0 make.cross C=1 CF='-fdiagnostic-prefix -D__CHECK_ENDIAN__' W=1 ARCH=arm 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 >>): arm-linux-gnueabi-ld: fs/cifs/ioctl.o: in function `cifs_dump_full_key': >> ioctl.c:(.text+0x44): undefined reference to `__get_user_bad' ---