tree: https://git.kernel.org/pub/scm/linux/kernel/git/arnd/playground.git arm-kill-set_fs-5 head: 1086c1cb895540fdf215aecf3ed4a96843d6633e commit: 7c6abb06b21a8c97bae4a330de4a490c5acf0dbf [17/40] scsi: megaraid_sas: simplify compat_ioctl handling config: arc-allyesconfig (attached as .config) compiler: arceb-elf-gcc (GCC) 9.3.0 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 git checkout 7c6abb06b21a8c97bae4a330de4a490c5acf0dbf # save the attached .config to linux build tree COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-9.3.0 make.cross ARCH=arc 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 >>): drivers/scsi/megaraid/megaraid_sas_base.c: In function 'megasas_compat_iocpacket_get_user': 8347 | return -ENOMEM; | ^ # https://git.kernel.org/pub/scm/linux/kernel/git/arnd/playground.git/commi... git remote add arnd-playground https://git.kernel.org/pub/scm/linux/kernel/git/arnd/playground.git git fetch --no-tags arnd-playground arm-kill-set_fs-5 git checkout 7c6abb06b21a8c97bae4a330de4a490c5acf0dbf vim +8347 drivers/scsi/megaraid/megaraid_sas_base.c 8335 8336 static struct megasas_iocpacket * 8337 megasas_compat_iocpacket_get_user(void __user *arg) 8338 { 8339 struct megasas_iocpacket *ioc; 8340 struct compat_megasas_iocpacket __user *cioc = arg; 8341 size_t size; 8342 int err = -EFAULT; 8343 int i; 8344 8345 ioc = kzalloc(sizeof(*ioc), GFP_KERNEL); 8346 if (!ioc) 8348 size = offsetof(struct megasas_iocpacket, frame) + sizeof(ioc->frame); 8349 if (copy_from_user(ioc, arg, size)) 8350 goto out; 8351 8352 for (i = 0; i < MAX_IOCTL_SGE; i++) { 8353 compat_uptr_t iov_base; 8354 if (get_user(iov_base, &cioc->sgl[i].iov_base) || 8355 get_user(ioc->sgl[i].iov_len, &cioc->sgl[i].iov_len)) { 8356 goto out; 8357 } 8358 ioc->sgl[i].iov_base = compat_ptr(iov_base); 8359 } 8360 8361 return ioc; 8362 out: 8363 kfree(ioc); 8364 8365 return ERR_PTR(err); 8366 } 8367 --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org