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R. Silva" Cc: oe-kbuild-all@lists.linux.dev, linux-kbuild@vger.kernel.org, linux-sparse@vger.kernel.org, linux-kernel@vger.kernel.org, llvm@lists.linux.dev, dri-devel@lists.freedesktop.org, linux-btrfs@vger.kernel.org, linux-hardening@vger.kernel.org, Vincent Mailhol Subject: Re: [PATCH v3 3/3] overflow: Remove is_non_negative() and is_negative() Message-ID: <202512221735.mRV4BZqB-lkp@intel.com> References: <20251220-remove_wtype-limits-v3-3-24b170af700e@kernel.org> Precedence: bulk X-Mailing-List: linux-sparse@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20251220-remove_wtype-limits-v3-3-24b170af700e@kernel.org> Hi Vincent, kernel test robot noticed the following build warnings: [auto build test WARNING on 3e7f562e20ee87a25e104ef4fce557d39d62fa85] url: https://github.com/intel-lab-lkp/linux/commits/Vincent-Mailhol/kbuild-remove-gcc-s-Wtype-limits/20251220-190509 base: 3e7f562e20ee87a25e104ef4fce557d39d62fa85 patch link: https://lore.kernel.org/r/20251220-remove_wtype-limits-v3-3-24b170af700e%40kernel.org patch subject: [PATCH v3 3/3] overflow: Remove is_non_negative() and is_negative() config: x86_64-randconfig-161-20251222 (https://download.01.org/0day-ci/archive/20251222/202512221735.mRV4BZqB-lkp@intel.com/config) compiler: gcc-14 (Debian 14.2.0-19) 14.2.0 If you fix the issue in a separate patch/commit (i.e. not just a new version of the same patch/commit), kindly add following tags | Reported-by: kernel test robot | Closes: https://lore.kernel.org/oe-kbuild-all/202512221735.mRV4BZqB-lkp@intel.com/ smatch warnings: fs/libfs.c:1628 generic_check_addressable() warn: unsigned '*_d' is never less than zero. fs/libfs.c:1628 generic_check_addressable() warn: unsigned '_a' is never less than zero. mm/vmalloc.c:4708 remap_vmalloc_range_partial() warn: unsigned '*_d' is never less than zero. mm/vmalloc.c:4708 remap_vmalloc_range_partial() warn: unsigned '_a' is never less than zero. vim +1628 fs/libfs.c 1b061d9247f71c Christoph Hellwig 2010-05-26 1613 30ca22c70e3ef0 Patrick J. LoPresti 2010-07-22 1614 /** 30ca22c70e3ef0 Patrick J. LoPresti 2010-07-22 1615 * generic_check_addressable - Check addressability of file system 30ca22c70e3ef0 Patrick J. LoPresti 2010-07-22 1616 * @blocksize_bits: log of file system block size 30ca22c70e3ef0 Patrick J. LoPresti 2010-07-22 1617 * @num_blocks: number of blocks in file system 30ca22c70e3ef0 Patrick J. LoPresti 2010-07-22 1618 * 30ca22c70e3ef0 Patrick J. LoPresti 2010-07-22 1619 * Determine whether a file system with @num_blocks blocks (and a 30ca22c70e3ef0 Patrick J. LoPresti 2010-07-22 1620 * block size of 2**@blocksize_bits) is addressable by the sector_t 30ca22c70e3ef0 Patrick J. LoPresti 2010-07-22 1621 * and page cache of the system. Return 0 if so and -EFBIG otherwise. 30ca22c70e3ef0 Patrick J. LoPresti 2010-07-22 1622 */ 30ca22c70e3ef0 Patrick J. LoPresti 2010-07-22 1623 int generic_check_addressable(unsigned blocksize_bits, u64 num_blocks) 30ca22c70e3ef0 Patrick J. LoPresti 2010-07-22 1624 { 30ca22c70e3ef0 Patrick J. LoPresti 2010-07-22 1625 u64 last_fs_block = num_blocks - 1; 25050181b61aa0 Pankaj Raghav 2025-06-30 1626 u64 last_fs_page, max_bytes; 25050181b61aa0 Pankaj Raghav 2025-06-30 1627 25050181b61aa0 Pankaj Raghav 2025-06-30 @1628 if (check_shl_overflow(num_blocks, blocksize_bits, &max_bytes)) 25050181b61aa0 Pankaj Raghav 2025-06-30 1629 return -EFBIG; 25050181b61aa0 Pankaj Raghav 2025-06-30 1630 25050181b61aa0 Pankaj Raghav 2025-06-30 1631 last_fs_page = (max_bytes >> PAGE_SHIFT) - 1; 30ca22c70e3ef0 Patrick J. LoPresti 2010-07-22 1632 30ca22c70e3ef0 Patrick J. LoPresti 2010-07-22 1633 if (unlikely(num_blocks == 0)) 30ca22c70e3ef0 Patrick J. LoPresti 2010-07-22 1634 return 0; 30ca22c70e3ef0 Patrick J. LoPresti 2010-07-22 1635 25050181b61aa0 Pankaj Raghav 2025-06-30 1636 if (blocksize_bits < 9) 30ca22c70e3ef0 Patrick J. LoPresti 2010-07-22 1637 return -EINVAL; 30ca22c70e3ef0 Patrick J. LoPresti 2010-07-22 1638 a33f13efe05192 Joel Becker 2010-08-16 1639 if ((last_fs_block > (sector_t)(~0ULL) >> (blocksize_bits - 9)) || a33f13efe05192 Joel Becker 2010-08-16 1640 (last_fs_page > (pgoff_t)(~0ULL))) { 30ca22c70e3ef0 Patrick J. LoPresti 2010-07-22 1641 return -EFBIG; 30ca22c70e3ef0 Patrick J. LoPresti 2010-07-22 1642 } 30ca22c70e3ef0 Patrick J. LoPresti 2010-07-22 1643 return 0; 30ca22c70e3ef0 Patrick J. LoPresti 2010-07-22 1644 } 30ca22c70e3ef0 Patrick J. LoPresti 2010-07-22 1645 EXPORT_SYMBOL(generic_check_addressable); 30ca22c70e3ef0 Patrick J. LoPresti 2010-07-22 1646 -- 0-DAY CI Kernel Test Service https://github.com/intel/lkp-tests/wiki