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SubjectRe: [PATCH 1/1] f2fs: fix validation of the block count in sanity_check_raw_super
Hi Martin,

Thank you for the patch! Perhaps something to improve:

[auto build test WARNING on f2fs/dev-test]
[also build test WARNING on v4.20-rc7 next-20181221]
[if your patch is applied to the wrong git tree, please drop us a note to help improve the system]

url: https://github.com/0day-ci/linux/commits/Martin-Blumenstingl/f2fs-fix-sanity_check_raw_super-on-big-endian-machines/20181222-142616
base: https://git.kernel.org/pub/scm/linux/kernel/git/jaegeuk/f2fs.git dev-test
config: i386-randconfig-a3-12211242 (attached as .config)
compiler: gcc-4.9 (Debian 4.9.4-2) 4.9.4
reproduce:
# save the attached .config to linux build tree
make ARCH=i386

All warnings (new ones prefixed by >>):

fs/f2fs/super.c: In function 'sanity_check_raw_super':
>> fs/f2fs/super.c:2499:4: warning: format '%u' expects argument of type 'unsigned int', but argument 5 has type '__le64' [-Wformat=]
segment_count, le64_to_cpu(raw_super->block_count));
^

vim +2499 fs/f2fs/super.c

2382
2383 static int sanity_check_raw_super(struct f2fs_sb_info *sbi,
2384 struct buffer_head *bh)
2385 {
2386 block_t segment_count, segs_per_sec, secs_per_zone;
2387 block_t total_sections, blocks_per_seg;
2388 struct f2fs_super_block *raw_super = (struct f2fs_super_block *)
2389 (bh->b_data + F2FS_SUPER_OFFSET);
2390 struct super_block *sb = sbi->sb;
2391 unsigned int blocksize;
2392 size_t crc_offset = 0;
2393 __u32 crc = 0;
2394
2395 /* Check checksum_offset and crc in superblock */
2396 if (__F2FS_HAS_FEATURE(raw_super, F2FS_FEATURE_SB_CHKSUM)) {
2397 crc_offset = le32_to_cpu(raw_super->checksum_offset);
2398 if (crc_offset !=
2399 offsetof(struct f2fs_super_block, crc)) {
2400 f2fs_msg(sb, KERN_INFO,
2401 "Invalid SB checksum offset: %zu",
2402 crc_offset);
2403 return 1;
2404 }
2405 crc = le32_to_cpu(raw_super->crc);
2406 if (!f2fs_crc_valid(sbi, crc, raw_super, crc_offset)) {
2407 f2fs_msg(sb, KERN_INFO,
2408 "Invalid SB checksum value: %u", crc);
2409 return 1;
2410 }
2411 }
2412
2413 if (F2FS_SUPER_MAGIC != le32_to_cpu(raw_super->magic)) {
2414 f2fs_msg(sb, KERN_INFO,
2415 "Magic Mismatch, valid(0x%x) - read(0x%x)",
2416 F2FS_SUPER_MAGIC, le32_to_cpu(raw_super->magic));
2417 return 1;
2418 }
2419
2420 /* Currently, support only 4KB page cache size */
2421 if (F2FS_BLKSIZE != PAGE_SIZE) {
2422 f2fs_msg(sb, KERN_INFO,
2423 "Invalid page_cache_size (%lu), supports only 4KB\n",
2424 PAGE_SIZE);
2425 return 1;
2426 }
2427
2428 /* Currently, support only 4KB block size */
2429 blocksize = 1 << le32_to_cpu(raw_super->log_blocksize);
2430 if (blocksize != F2FS_BLKSIZE) {
2431 f2fs_msg(sb, KERN_INFO,
2432 "Invalid blocksize (%u), supports only 4KB\n",
2433 blocksize);
2434 return 1;
2435 }
2436
2437 /* check log blocks per segment */
2438 if (le32_to_cpu(raw_super->log_blocks_per_seg) != 9) {
2439 f2fs_msg(sb, KERN_INFO,
2440 "Invalid log blocks per segment (%u)\n",
2441 le32_to_cpu(raw_super->log_blocks_per_seg));
2442 return 1;
2443 }
2444
2445 /* Currently, support 512/1024/2048/4096 bytes sector size */
2446 if (le32_to_cpu(raw_super->log_sectorsize) >
2447 F2FS_MAX_LOG_SECTOR_SIZE ||
2448 le32_to_cpu(raw_super->log_sectorsize) <
2449 F2FS_MIN_LOG_SECTOR_SIZE) {
2450 f2fs_msg(sb, KERN_INFO, "Invalid log sectorsize (%u)",
2451 le32_to_cpu(raw_super->log_sectorsize));
2452 return 1;
2453 }
2454 if (le32_to_cpu(raw_super->log_sectors_per_block) +
2455 le32_to_cpu(raw_super->log_sectorsize) !=
2456 F2FS_MAX_LOG_SECTOR_SIZE) {
2457 f2fs_msg(sb, KERN_INFO,
2458 "Invalid log sectors per block(%u) log sectorsize(%u)",
2459 le32_to_cpu(raw_super->log_sectors_per_block),
2460 le32_to_cpu(raw_super->log_sectorsize));
2461 return 1;
2462 }
2463
2464 segment_count = le32_to_cpu(raw_super->segment_count);
2465 segs_per_sec = le32_to_cpu(raw_super->segs_per_sec);
2466 secs_per_zone = le32_to_cpu(raw_super->secs_per_zone);
2467 total_sections = le32_to_cpu(raw_super->section_count);
2468
2469 /* blocks_per_seg should be 512, given the above check */
2470 blocks_per_seg = 1 << le32_to_cpu(raw_super->log_blocks_per_seg);
2471
2472 if (segment_count > F2FS_MAX_SEGMENT ||
2473 segment_count < F2FS_MIN_SEGMENTS) {
2474 f2fs_msg(sb, KERN_INFO,
2475 "Invalid segment count (%u)",
2476 segment_count);
2477 return 1;
2478 }
2479
2480 if (total_sections > segment_count ||
2481 total_sections < F2FS_MIN_SEGMENTS ||
2482 segs_per_sec > segment_count || !segs_per_sec) {
2483 f2fs_msg(sb, KERN_INFO,
2484 "Invalid segment/section count (%u, %u x %u)",
2485 segment_count, total_sections, segs_per_sec);
2486 return 1;
2487 }
2488
2489 if ((segment_count / segs_per_sec) < total_sections) {
2490 f2fs_msg(sb, KERN_INFO,
2491 "Small segment_count (%u < %u * %u)",
2492 segment_count, segs_per_sec, total_sections);
2493 return 1;
2494 }
2495
2496 if (segment_count > (le64_to_cpu(raw_super->block_count) >> 9)) {
2497 f2fs_msg(sb, KERN_INFO,
2498 "Wrong segment_count / block_count (%u > %u)",
> 2499 segment_count, le64_to_cpu(raw_super->block_count));
2500 return 1;
2501 }
2502
2503 if (secs_per_zone > total_sections || !secs_per_zone) {
2504 f2fs_msg(sb, KERN_INFO,
2505 "Wrong secs_per_zone / total_sections (%u, %u)",
2506 secs_per_zone, total_sections);
2507 return 1;
2508 }
2509 if (le32_to_cpu(raw_super->extension_count) > F2FS_MAX_EXTENSION ||
2510 raw_super->hot_ext_count > F2FS_MAX_EXTENSION ||
2511 (le32_to_cpu(raw_super->extension_count) +
2512 raw_super->hot_ext_count) > F2FS_MAX_EXTENSION) {
2513 f2fs_msg(sb, KERN_INFO,
2514 "Corrupted extension count (%u + %u > %u)",
2515 le32_to_cpu(raw_super->extension_count),
2516 raw_super->hot_ext_count,
2517 F2FS_MAX_EXTENSION);
2518 return 1;
2519 }
2520
2521 if (le32_to_cpu(raw_super->cp_payload) >
2522 (blocks_per_seg - F2FS_CP_PACKS)) {
2523 f2fs_msg(sb, KERN_INFO,
2524 "Insane cp_payload (%u > %u)",
2525 le32_to_cpu(raw_super->cp_payload),
2526 blocks_per_seg - F2FS_CP_PACKS);
2527 return 1;
2528 }
2529
2530 /* check reserved ino info */
2531 if (le32_to_cpu(raw_super->node_ino) != 1 ||
2532 le32_to_cpu(raw_super->meta_ino) != 2 ||
2533 le32_to_cpu(raw_super->root_ino) != 3) {
2534 f2fs_msg(sb, KERN_INFO,
2535 "Invalid Fs Meta Ino: node(%u) meta(%u) root(%u)",
2536 le32_to_cpu(raw_super->node_ino),
2537 le32_to_cpu(raw_super->meta_ino),
2538 le32_to_cpu(raw_super->root_ino));
2539 return 1;
2540 }
2541
2542 /* check CP/SIT/NAT/SSA/MAIN_AREA area boundary */
2543 if (sanity_check_area_boundary(sbi, bh))
2544 return 1;
2545
2546 return 0;
2547 }
2548

---
0-DAY kernel test infrastructure Open Source Technology Center
https://lists.01.org/pipermail/kbuild-all Intel Corporation
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