tree: https://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs.git work.iov_iter_get_pages head: fe8e2809c7db0ec65403b31b50906f3f481a9b10 commit: e64d637d648390e4ac0643747ae174c3be15f243 [24/33] iov_iter: saner helper for page array allocation config: mips-randconfig-m031-20220619 (https://download.01.org/0day-ci/archive/20220619/202206192306.POJg04ej-lkp@xxxxxxxxx/config) compiler: mips-linux-gcc (GCC) 11.3.0 If you fix the issue, kindly add following tag where applicable Reported-by: kernel test robot <lkp@xxxxxxxxx> smatch warnings: lib/iov_iter.c:1295 iter_xarray_get_pages() warn: unsigned 'count' is never less than zero. vim +/count +1295 lib/iov_iter.c 1280 1281 static ssize_t iter_xarray_get_pages(struct iov_iter *i, 1282 struct page ***pages, size_t maxsize, 1283 unsigned maxpages, size_t *_start_offset) 1284 { 1285 unsigned nr, offset; 1286 pgoff_t index, count; 1287 loff_t pos; 1288 1289 pos = i->xarray_start + i->iov_offset; 1290 index = pos >> PAGE_SHIFT; 1291 offset = pos & ~PAGE_MASK; 1292 *_start_offset = offset; 1293 1294 count = want_pages_array(pages, maxsize, offset, maxpages); > 1295 if (count < 0) 1296 return count; 1297 nr = iter_xarray_populate_pages(*pages, i->xarray, index, count); 1298 if (nr == 0) 1299 return 0; 1300 1301 return min_t(size_t, nr * PAGE_SIZE - offset, maxsize); 1302 } 1303 -- 0-DAY CI Kernel Test Service https://01.org/lkp
