tree: https://git.kernel.org/pub/scm/linux/kernel/git/axboe/linux-block.git for-5.13/io_uring head: cad640129f844fcb72750f4cced5041ead287cbe commit: 504a5bb259c88ae14141660adc048919f54b6d6b [94/106] io_uring: refactor io_close config: x86_64-randconfig-s021-20210411 (attached as .config) compiler: gcc-9 (Debian 9.3.0-22) 9.3.0 reproduce: # apt-get install sparse # sparse version: v0.6.3-279-g6d5d9b42-dirty # https://git.kernel.org/pub/scm/linux/kernel/git/axboe/linux-block.git/com... git remote add block https://git.kernel.org/pub/scm/linux/kernel/git/axboe/linux-block.git git fetch --no-tags block for-5.13/io_uring git checkout 504a5bb259c88ae14141660adc048919f54b6d6b # save the attached .config to linux build tree make W=1 C=1 CF='-fdiagnostic-prefix -D__CHECK_ENDIAN__' ARCH=x86_64 If you fix the issue, kindly add following tag as appropriate Reported-by: kernel test robot <lkp(a)intel.com&gt; sparse warnings: (new ones prefixed by >>) fs/io_uring.c:2876:24: sparse: sparse: incorrect type in return expression (different address spaces) @@ expected void [noderef] __user * @@ got struct io_buffer *[assigned] kbuf @@ fs/io_uring.c:2876:24: sparse: expected void [noderef] __user * fs/io_uring.c:2876:24: sparse: got struct io_buffer *[assigned] kbuf fs/io_uring.c:4174:14: sparse: expected struct file *file fs/io_uring.c:4174:14: sparse: got struct file [noderef] __rcu * fs/io_uring.c:4781:72: sparse: sparse: incorrect type in argument 4 (different base types) @@ expected int mask @@ got restricted __poll_t [usertype] mask @@ fs/io_uring.c:4781:72: sparse: expected int mask fs/io_uring.c:4781:72: sparse: got restricted __poll_t [usertype] mask fs/io_uring.c:4785:21: sparse: sparse: incorrect type in assignment (different base types) @@ expected unsigned int [usertype] result @@ got restricted __poll_t [usertype] mask @@ fs/io_uring.c:4785:21: sparse: expected unsigned int [usertype] result fs/io_uring.c:4785:21: sparse: got restricted __poll_t [usertype] mask fs/io_uring.c:4810:29: sparse: sparse: incorrect type in assignment (different base types) @@ expected unsigned int [usertype] result @@ got restricted __poll_t @@ fs/io_uring.c:4810:29: sparse: expected unsigned int [usertype] result fs/io_uring.c:4810:29: sparse: got restricted __poll_t fs/io_uring.c:4891:49: sparse: sparse: incorrect type in argument 2 (different base types) @@ expected restricted __poll_t [usertype] mask @@ got unsigned int [usertype] result @@ fs/io_uring.c:4891:49: sparse: expected restricted __poll_t [usertype] mask fs/io_uring.c:4891:49: sparse: got unsigned int [usertype] result fs/io_uring.c:5041:41: sparse: sparse: incorrect type in argument 4 (different base types) @@ expected int mask @@ got restricted __poll_t [usertype] @@ fs/io_uring.c:5041:41: sparse: expected int mask fs/io_uring.c:5041:41: sparse: got restricted __poll_t [usertype] fs/io_uring.c:5129:22: sparse: sparse: invalid assignment: |= fs/io_uring.c:5129:22: sparse: left side has type restricted __poll_t fs/io_uring.c:5129:22: sparse: right side has type int fs/io_uring.c:5131:22: sparse: sparse: invalid assignment: |= fs/io_uring.c:5131:22: sparse: left side has type restricted __poll_t fs/io_uring.c:5131:22: sparse: right side has type int fs/io_uring.c:5136:22: sparse: sparse: invalid assignment: &= fs/io_uring.c:5136:22: sparse: left side has type restricted __poll_t fs/io_uring.c:5136:22: sparse: right side has type int fs/io_uring.c:5138:14: sparse: sparse: invalid assignment: |= fs/io_uring.c:5138:14: sparse: left side has type restricted __poll_t fs/io_uring.c:5138:14: sparse: right side has type int fs/io_uring.c:5152:67: sparse: sparse: incorrect type in argument 4 (different base types) @@ expected int mask @@ got restricted __poll_t [assigned] [usertype] mask @@ fs/io_uring.c:5152:67: sparse: expected int mask fs/io_uring.c:5152:67: sparse: got restricted __poll_t [assigned] [usertype] mask fs/io_uring.c:5153:52: sparse: sparse: incorrect type in argument 5 (different base types) @@ expected int events @@ got restricted __poll_t [usertype] events @@ fs/io_uring.c:5153:52: sparse: expected int events fs/io_uring.c:5153:52: sparse: got restricted __poll_t [usertype] events fs/io_uring.c:5342:24: sparse: sparse: invalid assignment: |= fs/io_uring.c:5342:24: sparse: left side has type unsigned int fs/io_uring.c:5342:24: sparse: right side has type restricted __poll_t fs/io_uring.c:5356:58: sparse: sparse: restricted __poll_t degrades to integer fs/io_uring.c:5355:37: sparse: sparse: restricted __poll_t degrades to integer fs/io_uring.c:5355:22: sparse: sparse: incorrect type in assignment (different base types) @@ expected restricted __poll_t [usertype] events @@ got unsigned int @@ fs/io_uring.c:5355:22: sparse: expected restricted __poll_t [usertype] events fs/io_uring.c:5355:22: sparse: got unsigned int fs/io_uring.c:5425:35: sparse: sparse: invalid assignment: &= fs/io_uring.c:5425:35: sparse: left side has type restricted __poll_t fs/io_uring.c:5425:35: sparse: right side has type int fs/io_uring.c:5426:47: sparse: sparse: restricted __poll_t degrades to integer fs/io_uring.c:5426:35: sparse: sparse: invalid assignment: |= fs/io_uring.c:5426:35: sparse: left side has type restricted __poll_t fs/io_uring.c:5426:35: sparse: right side has type unsigned int fs/io_uring.c:7204:9: sparse: sparse: context imbalance in 'io_sq_thread_unpark' - wrong count at exit fs/io_uring.c:7215:9: sparse: sparse: context imbalance in 'io_sq_thread_park' - wrong count at exit vim +4174 fs/io_uring.c b5dba59e0cf7e2 Jens Axboe 2019-12-11 4159 889fca73287b0a Pavel Begunkov 2021-02-10 4160 static int io_close(struct io_kiocb *req, unsigned int issue_flags) b5dba59e0cf7e2 Jens Axboe 2019-12-11 4161 { 9eac1904d33642 Jens Axboe 2021-01-19 4162 struct files_struct *files = current->files; 3af73b286ccee4 Pavel Begunkov 2020-06-08 4163 struct io_close *close = &req->close; 9eac1904d33642 Jens Axboe 2021-01-19 4164 struct fdtable *fdt; 504a5bb259c88a Pavel Begunkov 2021-04-11 4165 struct file *file = NULL; 504a5bb259c88a Pavel Begunkov 2021-04-11 4166 int ret = -EBADF; b5dba59e0cf7e2 Jens Axboe 2019-12-11 4167 9eac1904d33642 Jens Axboe 2021-01-19 4168 spin_lock(&files->file_lock); 9eac1904d33642 Jens Axboe 2021-01-19 4169 fdt = files_fdtable(files); 9eac1904d33642 Jens Axboe 2021-01-19 4170 if (close->fd >= fdt->max_fds) { 9eac1904d33642 Jens Axboe 2021-01-19 4171 spin_unlock(&files->file_lock); 9eac1904d33642 Jens Axboe 2021-01-19 4172 goto err; 9eac1904d33642 Jens Axboe 2021-01-19 4173 } 9eac1904d33642 Jens Axboe 2021-01-19 @4174 file = fdt->fd[close->fd]; 504a5bb259c88a Pavel Begunkov 2021-04-11 4175 if (!file || file->f_op == &io_uring_fops) { 9eac1904d33642 Jens Axboe 2021-01-19 4176 spin_unlock(&files->file_lock); 9eac1904d33642 Jens Axboe 2021-01-19 4177 file = NULL; 9eac1904d33642 Jens Axboe 2021-01-19 4178 goto err; 3af73b286ccee4 Pavel Begunkov 2020-06-08 4179 } b5dba59e0cf7e2 Jens Axboe 2019-12-11 4180 b5dba59e0cf7e2 Jens Axboe 2019-12-11 4181 /* if the file has a flush method, be safe and punt to async */ 45d189c6062922 Pavel Begunkov 2021-02-10 4182 if (file->f_op->flush && (issue_flags & IO_URING_F_NONBLOCK)) { 9eac1904d33642 Jens Axboe 2021-01-19 4183 spin_unlock(&files->file_lock); 0bf0eefdab52d9 Pavel Begunkov 2020-05-26 4184 return -EAGAIN; b5dba59e0cf7e2 Jens Axboe 2019-12-11 4185 } b5dba59e0cf7e2 Jens Axboe 2019-12-11 4186 9eac1904d33642 Jens Axboe 2021-01-19 4187 ret = __close_fd_get_file(close->fd, &file); 9eac1904d33642 Jens Axboe 2021-01-19 4188 spin_unlock(&files->file_lock); 9eac1904d33642 Jens Axboe 2021-01-19 4189 if (ret < 0) { 9eac1904d33642 Jens Axboe 2021-01-19 4190 if (ret == -ENOENT) 9eac1904d33642 Jens Axboe 2021-01-19 4191 ret = -EBADF; 9eac1904d33642 Jens Axboe 2021-01-19 4192 goto err; 9eac1904d33642 Jens Axboe 2021-01-19 4193 } 9eac1904d33642 Jens Axboe 2021-01-19 4194 3af73b286ccee4 Pavel Begunkov 2020-06-08 4195 /* No ->flush() or already async, safely close from here */ 9eac1904d33642 Jens Axboe 2021-01-19 4196 ret = filp_close(file, current->files); 9eac1904d33642 Jens Axboe 2021-01-19 4197 err: 3af73b286ccee4 Pavel Begunkov 2020-06-08 4198 if (ret < 0) 3af73b286ccee4 Pavel Begunkov 2020-06-08 4199 req_set_fail_links(req); 9eac1904d33642 Jens Axboe 2021-01-19 4200 if (file) 9eac1904d33642 Jens Axboe 2021-01-19 4201 fput(file); 889fca73287b0a Pavel Begunkov 2021-02-10 4202 __io_req_complete(req, issue_flags, ret, 0); a2100672f3b2af Pavel Begunkov 2020-03-02 4203 return 0; a2100672f3b2af Pavel Begunkov 2020-03-02 4204 } a2100672f3b2af Pavel Begunkov 2020-03-02 4205 :::::: The code at line 4174 was first introduced by commit :::::: 9eac1904d3364254d622bf2c771c4f85cd435fc2 io_uring: get rid of intermediate IORING_OP_CLOSE stage :::::: TO: Jens Axboe <axboe(a)kernel.dk&gt; :::::: CC: Jens Axboe <axboe(a)kernel.dk&gt; --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org