Hi Gwan-gyeong, Thank you for the patch! Perhaps something to improve: [auto build test WARNING on drm-tip/drm-tip] [also build test WARNING on linus/master v6.0-rc5] [cannot apply to drm-intel/for-linux-next kees/for-next/hardening next-20220916] [If your patch is applied to the wrong git tree, kindly drop us a note. And when submitting patch, we suggest to use '--base' as documented in https://git-scm.com/docs/git-format-patch#_base_tree_information] url: https://github.com/intel-lab-lkp/linux/commits/Gwan-gyeong-Mun/Fixes-integer-overflow-or-integer-truncation-issues-in-page-lookups-ttm-place-configuration-and-scatterlist-creation/20220909-190301 base: git://anongit.freedesktop.org/drm/drm-tip drm-tip config: i386-randconfig-s002 (https://download.01.org/0day-ci/archive/20220918/202209180742.kE2Xbxqz-lkp@xxxxxxxxx/config) compiler: gcc-11 (Debian 11.3.0-5) 11.3.0 reproduce: # apt-get install sparse # sparse version: v0.6.4-39-gce1a6720-dirty # https://github.com/intel-lab-lkp/linux/commit/8d39d691758034d1082773e43b9cb4738b1f4387 git remote add linux-review https://github.com/intel-lab-lkp/linux git fetch --no-tags linux-review Gwan-gyeong-Mun/Fixes-integer-overflow-or-integer-truncation-issues-in-page-lookups-ttm-place-configuration-and-scatterlist-creation/20220909-190301 git checkout 8d39d691758034d1082773e43b9cb4738b1f4387 # save the config file mkdir build_dir && cp config build_dir/.config make W=1 C=1 CF='-fdiagnostic-prefix -D__CHECK_ENDIAN__' O=build_dir ARCH=i386 SHELL=/bin/bash drivers/gpu/drm/i915/ If you fix the issue, kindly add following tag where applicable Reported-by: kernel test robot <lkp@xxxxxxxxx> sparse warnings: (new ones prefixed by >>) >> drivers/gpu/drm/i915/i915_user_extensions.c:56:21: sparse: sparse: incorrect type in assignment (different address spaces) @@ expected struct i915_user_extension [noderef] __user *ext @@ got void *[noderef] __user @@ drivers/gpu/drm/i915/i915_user_extensions.c:56:21: sparse: expected struct i915_user_extension [noderef] __user *ext drivers/gpu/drm/i915/i915_user_extensions.c:56:21: sparse: got void *[noderef] __user vim +56 drivers/gpu/drm/i915/i915_user_extensions.c 15 16 int i915_user_extensions(struct i915_user_extension __user *ext, 17 const i915_user_extension_fn *tbl, 18 unsigned int count, 19 void *data) 20 { 21 unsigned int stackdepth = 512; 22 23 while (ext) { 24 int i, err; 25 u32 name; 26 u64 next; 27 28 if (!stackdepth--) /* recursion vs useful flexibility */ 29 return -E2BIG; 30 31 err = check_user_mbz(&ext->flags); 32 if (err) 33 return err; 34 35 for (i = 0; i < ARRAY_SIZE(ext->rsvd); i++) { 36 err = check_user_mbz(&ext->rsvd[i]); 37 if (err) 38 return err; 39 } 40 41 if (get_user(name, &ext->name)) 42 return -EFAULT; 43 44 err = -EINVAL; 45 if (name < count) { 46 name = array_index_nospec(name, count); 47 if (tbl[name]) 48 err = tbl[name](ext, data); 49 } 50 if (err) 51 return err; 52 53 if (get_user(next, &ext->next_extension)) 54 return -EFAULT; 55 > 56 if (check_assign_user_ptr(next, ext)) -- 0-DAY CI Kernel Test Service https://01.org/lkp
