io_uring: mark task TASK_RUNNING before handling resume/task work

commit 2f2bb1ffc9983e227424d0787289da5483b0c74f upstream.

Just like for task_work, set the task mode to TASK_RUNNING before doing
any potential resume work. We're not holding any locks at this point,
but we may have already set the task state to TASK_INTERRUPTIBLE in
preparation for going to sleep waiting for events. Ensure that we set it
back to TASK_RUNNING if we have work to process, to avoid warnings on
calling blocking operations with !TASK_RUNNING.

Fixes: b5d3ae202fbf ("io_uring: handle TIF_NOTIFY_RESUME when checking for task_work")
Reported-by: kernel test robot <oliver.sang@intel.com>
Link: https://lore.kernel.org/oe-lkp/202302062208.24d3e563-oliver.sang@intel.com
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/io_uring/io_uring.h b/io_uring/io_uring.h
index 3bacbfe..0196005 100644 (file)
--- a/io_uring/io_uring.h
+++ b/io_uring/io_uring.h
@@ -261,8 +261,10 @@ static inline int io_run_task_work(void)
         * notify work that needs processing.
         */
        if (current->flags & PF_IO_WORKER &&
-           test_thread_flag(TIF_NOTIFY_RESUME))
+           test_thread_flag(TIF_NOTIFY_RESUME)) {
+               __set_current_state(TASK_RUNNING);
                resume_user_mode_work(NULL);
+       }
        if (task_work_pending(current)) {
                __set_current_state(TASK_RUNNING);
                task_work_run();