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/?id=7ba3d1cdb7988ccfbc6e4995dee04510c85fefbc
        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@intel.com>

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'

---
0-DAY CI Kernel Test Service, Intel Corporation
https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org