From: Jens Axboe axboe@kernel.dk
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 --- io_uring/io_uring.h | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-)
--- 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();