Hi Nitesh, url: https://github.com/0day-ci/linux/commits/Nitesh-Shetty/block-make-bio_map_kern-non-static/20220207-231407 base: https://git.kernel.org/pub/scm/linux/kernel/git/axboe/linux-block.git for-next config: i386-randconfig-m021-20220207 (https://download.01.org/0day-ci/archive/20220211/202202110625.4yHrKaUn-lkp@xxxxxxxxx/config) compiler: gcc-9 (Debian 9.3.0-22) 9.3.0 If you fix the issue, kindly add following tag as appropriate Reported-by: kernel test robot <lkp@xxxxxxxxx> Reported-by: Dan Carpenter <dan.carpenter@xxxxxxxxxx> New smatch warnings: drivers/nvme/target/io-cmd-file.c:377 nvmet_file_copy_work() error: uninitialized symbol 'len'. vim +/len +377 drivers/nvme/target/io-cmd-file.c 6bb6ea64499e1ac Arnav Dawn 2022-02-07 350 static void nvmet_file_copy_work(struct work_struct *w) 6bb6ea64499e1ac Arnav Dawn 2022-02-07 351 { 6bb6ea64499e1ac Arnav Dawn 2022-02-07 352 struct nvmet_req *req = container_of(w, struct nvmet_req, f.work); 6bb6ea64499e1ac Arnav Dawn 2022-02-07 353 int nr_range; 6bb6ea64499e1ac Arnav Dawn 2022-02-07 354 loff_t pos; 6bb6ea64499e1ac Arnav Dawn 2022-02-07 355 struct nvme_command *cmnd = req->cmd; 6bb6ea64499e1ac Arnav Dawn 2022-02-07 356 int ret = 0, len, src, id; 6bb6ea64499e1ac Arnav Dawn 2022-02-07 357 6bb6ea64499e1ac Arnav Dawn 2022-02-07 358 nr_range = cmnd->copy.nr_range + 1; 6bb6ea64499e1ac Arnav Dawn 2022-02-07 359 pos = le64_to_cpu(req->cmd->copy.sdlba) << req->ns->blksize_shift; 6bb6ea64499e1ac Arnav Dawn 2022-02-07 360 if (unlikely(pos + req->transfer_len > req->ns->size)) { 6bb6ea64499e1ac Arnav Dawn 2022-02-07 361 nvmet_req_complete(req, errno_to_nvme_status(req, -ENOSPC)); 6bb6ea64499e1ac Arnav Dawn 2022-02-07 362 return; 6bb6ea64499e1ac Arnav Dawn 2022-02-07 363 } 6bb6ea64499e1ac Arnav Dawn 2022-02-07 364 6bb6ea64499e1ac Arnav Dawn 2022-02-07 365 for (id = 0 ; id < nr_range; id++) { 6bb6ea64499e1ac Arnav Dawn 2022-02-07 366 struct nvme_copy_range range; 6bb6ea64499e1ac Arnav Dawn 2022-02-07 367 6bb6ea64499e1ac Arnav Dawn 2022-02-07 368 ret = nvmet_copy_from_sgl(req, id * sizeof(range), &range, 6bb6ea64499e1ac Arnav Dawn 2022-02-07 369 sizeof(range)); 6bb6ea64499e1ac Arnav Dawn 2022-02-07 370 if (ret) 6bb6ea64499e1ac Arnav Dawn 2022-02-07 371 goto out; ^^^^^^^^ 6bb6ea64499e1ac Arnav Dawn 2022-02-07 372 6bb6ea64499e1ac Arnav Dawn 2022-02-07 373 len = (le16_to_cpu(range.nlb) + 1) << (req->ns->blksize_shift); 6bb6ea64499e1ac Arnav Dawn 2022-02-07 374 src = (le64_to_cpu(range.slba) << (req->ns->blksize_shift)); 6bb6ea64499e1ac Arnav Dawn 2022-02-07 375 ret = vfs_copy_file_range(req->ns->file, src, req->ns->file, pos, len, 0); 6bb6ea64499e1ac Arnav Dawn 2022-02-07 376 out: 6bb6ea64499e1ac Arnav Dawn 2022-02-07 @377 if (ret != len) { ^^^ "len" is not initialized. 6bb6ea64499e1ac Arnav Dawn 2022-02-07 378 pos += ret; 6bb6ea64499e1ac Arnav Dawn 2022-02-07 379 req->cqe->result.u32 = cpu_to_le32(id); 6bb6ea64499e1ac Arnav Dawn 2022-02-07 380 nvmet_req_complete(req, ret < 0 ? errno_to_nvme_status(req, ret) : 6bb6ea64499e1ac Arnav Dawn 2022-02-07 381 errno_to_nvme_status(req, -EIO)); 6bb6ea64499e1ac Arnav Dawn 2022-02-07 382 return; 6bb6ea64499e1ac Arnav Dawn 2022-02-07 383 6bb6ea64499e1ac Arnav Dawn 2022-02-07 384 } else 6bb6ea64499e1ac Arnav Dawn 2022-02-07 385 pos += len; 6bb6ea64499e1ac Arnav Dawn 2022-02-07 386 } 6bb6ea64499e1ac Arnav Dawn 2022-02-07 387 nvmet_req_complete(req, ret); --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@xxxxxxxxxxxx
