tree: https://git.kernel.org/pub/scm/linux/kernel/git/leon/linux-rdma.git rdma-next head: 93f98326fc4e11126c642c8fcdcde78a3988a069 commit: 96d06cee786f3ea1f4a623ed2d88bc77059aa671 [69/78] RDMA/uverbs: Expose the new GID query API to user space config: i386-randconfig-m021-20200911 (attached as .config) compiler: gcc-9 (Debian 9.3.0-15) 9.3.0 If you fix the issue, kindly add following tag as appropriate Reported-by: kernel test robot <lkp(a)intel.com&gt; New smatch warnings: drivers/infiniband/core/uverbs_std_types_device.c:353 ib_uverbs_handler_UVERBS_METHOD_QUERY_GID_TABLE() warn: unsigned 'num_entries' is never less than zero. Old smatch warnings: include/rdma/uverbs_ioctl.h:708 uverbs_attr_get_len() warn: passing a valid pointer to 'PTR_ERR' drivers/infiniband/core/uverbs_std_types_device.c:291 copy_gid_entries_to_user() warn: passing a valid pointer to 'PTR_ERR' # https://git.kernel.org/pub/scm/linux/kernel/git/leon/linux-rdma.git/commi... git remote add leon-rdma https://git.kernel.org/pub/scm/linux/kernel/git/leon/linux-rdma.git git fetch --no-tags leon-rdma rdma-next git checkout 96d06cee786f3ea1f4a623ed2d88bc77059aa671 vim +/num_entries +353 drivers/infiniband/core/uverbs_std_types_device.c 311 312 static int UVERBS_HANDLER(UVERBS_METHOD_QUERY_GID_TABLE)( 313 struct uverbs_attr_bundle *attrs) 314 { 315 struct ib_uverbs_gid_entry *entries; 316 struct ib_ucontext *ucontext; 317 struct ib_device *ib_dev; 318 size_t user_entry_size; 319 size_t max_entries; 320 size_t num_entries; 321 u32 flags; 322 int ret; 323 324 ret = uverbs_get_flags32(&flags, attrs, 325 UVERBS_ATTR_QUERY_GID_TABLE_FLAGS, 0); 326 if (ret) 327 return ret; 328 329 ret = uverbs_get_const(&user_entry_size, attrs, 330 UVERBS_ATTR_QUERY_GID_TABLE_ENTRY_SIZE); 331 if (ret) 332 return ret; 333 334 max_entries = uverbs_attr_ptr_get_array_size( 335 attrs, UVERBS_ATTR_QUERY_GID_TABLE_RESP_ENTRIES, 336 user_entry_size); 337 if (max_entries <= 0) 338 return -EINVAL; 339 340 ucontext = ib_uverbs_get_ucontext(attrs); 341 if (IS_ERR(ucontext)) 342 return PTR_ERR(ucontext); 343 ib_dev = ucontext->device; 344 345 if (check_mul_overflow(max_entries, sizeof(*entries), &num_entries)) 346 return -EINVAL; 347 348 entries = uverbs_zalloc(attrs, num_entries); 349 if (!entries) 350 return -ENOMEM; 351 352 num_entries = rdma_query_gid_table(ib_dev, entries, max_entries); 354 return num_entries; 355 356 ret = copy_gid_entries_to_user(attrs, entries, num_entries, 357 user_entry_size); 358 if (ret) 359 return ret; 360 361 ret = uverbs_copy_to(attrs, 362 UVERBS_ATTR_QUERY_GID_TABLE_RESP_NUM_ENTRIES, 363 &num_entries, sizeof(num_entries)); 364 return ret; 365 } 366 --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org