tree: https://android.googlesource.com/kernel/common android-mainline head: e94931cb2c0ec3992df6dfe452f2145fc5ad2c74 commit: 21b07a71404e12fa0db9ce79bc0b1b02af5f71d0 [2/5] ANDROID: Incremental fs: Make fill block an ioctl reproduce: # apt-get install sparse # sparse version: v0.6.1-180-g0558317d-dirty git checkout 21b07a71404e12fa0db9ce79bc0b1b02af5f71d0 make ARCH=x86_64 allmodconfig make C=1 CF='-fdiagnostic-prefix -D__CHECK_ENDIAN__' If you fix the issue, kindly add following tag Reported-by: kbuild test robot <lkp(a)intel.com&gt; sparse warnings: (new ones prefixed by >>) vim +1371 fs/incfs/vfs.c 1353 1354 static long ioctl_fill_blocks(struct file *f, void __user *arg) 1355 { 1356 struct incfs_fill_blocks __user *usr_fill_blocks = arg; 1357 struct incfs_fill_blocks fill_blocks; 1358 struct incfs_fill_block *usr_fill_block_array; 1359 struct data_file *df = get_incfs_data_file(f); 1360 const ssize_t data_buf_size = 2 * INCFS_DATA_FILE_BLOCK_SIZE; 1361 u8 *data_buf = NULL; 1362 ssize_t error = 0; 1363 int i = 0; 1364 1365 if (!df) 1366 return -EBADF; 1367 1368 if (copy_from_user(&fill_blocks, usr_fill_blocks, sizeof(fill_blocks))) 1369 return -EFAULT; 1370 1372 data_buf = (u8 *)__get_free_pages(GFP_NOFS, get_order(data_buf_size)); 1373 if (!data_buf) 1374 return -ENOMEM; 1375 1376 for (i = 0; i < fill_blocks.count; i++) { 1377 struct incfs_fill_block fill_block = {}; 1378 1380 sizeof(fill_block)) > 0) { 1381 error = -EFAULT; 1382 break; 1383 } 1384 1385 if (fill_block.data_len > data_buf_size) { 1386 error = -E2BIG; 1387 break; 1388 } 1389 1390 if (copy_from_user(data_buf, u64_to_user_ptr(fill_block.data), 1391 fill_block.data_len) > 0) { 1392 error = -EFAULT; 1393 break; 1394 } 1395 fill_block.data = 0; /* To make sure nobody uses it. */ 1396 if (fill_block.flags & INCFS_BLOCK_FLAGS_HASH) { 1397 error = incfs_process_new_hash_block(df, &fill_block, 1398 data_buf); 1399 } else { 1400 error = incfs_process_new_data_block(df, &fill_block, 1401 data_buf); 1402 } 1403 if (error) 1404 break; 1405 } 1406 1407 if (data_buf) 1408 free_pages((unsigned long)data_buf, get_order(data_buf_size)); 1409 1410 /* 1411 * Only report the error if no records were processed, otherwise 1412 * just return how many were processed successfully. 1413 */ 1414 if (i == 0) 1415 return error; 1416 1417 return i; 1418 } 1419 --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org