tree: https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git master head: d3fde8ff50ab265749704bd7fbcf70d35235421f commit: 15c8a3b370909a43c03bb937a373921ee92be65a [13726/14198] iov_iter: Add a general purpose iteration function config: x86_64-randconfig-s021 (https://download.01.org/0day-ci/archive/20220528/202205280944.JM8XsoYY-lkp@xxxxxxxxx/config) compiler: gcc-11 (Debian 11.3.0-1) 11.3.0 reproduce: # apt-get install sparse # sparse version: v0.6.4-14-g5a0004b5-dirty # https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git/commit/?id=15c8a3b370909a43c03bb937a373921ee92be65a git remote add linux-next https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git git fetch --no-tags linux-next master git checkout 15c8a3b370909a43c03bb937a373921ee92be65a # 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=x86_64 SHELL=/bin/bash If you fix the issue, kindly add following tag where applicable Reported-by: kernel test robot <lkp@xxxxxxxxx> sparse warnings: (new ones prefixed by >>) >> lib/iov_iter.c:1815:9: sparse: sparse: incorrect type in argument 2 (different address spaces) @@ expected void const *p @@ got void [noderef] __user *[assigned] base @@ lib/iov_iter.c:1815:9: sparse: expected void const *p lib/iov_iter.c:1815:9: sparse: got void [noderef] __user *[assigned] base vim +1815 lib/iov_iter.c 1791 1792 /** 1793 * iov_iter_scan - Scan a source iter 1794 * @i: The iterator to scan 1795 * @bytes: The amount of buffer/data to scan 1796 * @scanner: The function to call for each bit 1797 * @priv: Private data to pass to the scanner function 1798 * 1799 * Scan an iterator, passing each segment to the scanner function. If the 1800 * scanner returns an error at any time, scanning stops and the error is 1801 * returned, otherwise the sum of the scanner results is returned. 1802 */ 1803 ssize_t iov_iter_scan(struct iov_iter *i, size_t bytes, 1804 ssize_t (*scanner)(struct iov_iter *i, const void *p, 1805 size_t len, size_t off, void *priv), 1806 void *priv) 1807 { 1808 ssize_t ret = 0, scanned = 0; 1809 1810 if (!bytes) 1811 return 0; 1812 if (iter_is_iovec(i)) 1813 might_fault(); 1814 > 1815 iterate_and_advance( 1816 i, bytes, base, len, off, ({ 1817 ret = scanner(i, base, len, off, priv); 1818 if (ret < 0) 1819 break; 1820 scanned += ret; 1821 }), ({ 1822 ret = scanner(i, base, len, off, priv); 1823 if (ret < 0) 1824 break; 1825 scanned += ret; 1826 }) 1827 ); 1828 return ret < 0 ? ret : scanned; 1829 } 1830 EXPORT_SYMBOL(iov_iter_scan); 1831 -- 0-DAY CI Kernel Test Service https://01.org/lkp
