================================================================== BUG: KCSAN: data-race in io_req_task_complete / kiocb_done write to 0xffff8881236f8044 of 4 bytes by task 15903 on cpu 0: io_req_complete_state fs/io_uring.c:2132 [inline] io_req_task_complete+0x9a/0x490 fs/io_uring.c:2995 handle_tw_list fs/io_uring.c:2480 [inline] tctx_task_work+0x7d3/0xab0 fs/io_uring.c:2514 task_work_run+0x8e/0x110 kernel/task_work.c:164 tracehook_notify_signal include/linux/tracehook.h:213 [inline] handle_signal_work kernel/entry/common.c:146 [inline] exit_to_user_mode_loop kernel/entry/common.c:186 [inline] exit_to_user_mode_prepare+0xfd/0x180 kernel/entry/common.c:221 __syscall_exit_to_user_mode_work kernel/entry/common.c:303 [inline] syscall_exit_to_user_mode+0x20/0x40 kernel/entry/common.c:314 do_syscall_64+0x37/0x70 arch/x86/entry/common.c:86 entry_SYSCALL_64_after_hwframe+0x44/0xae read to 0xffff8881236f8044 of 4 bytes by task 15914 on cpu 1: kiocb_done+0x1f2/0x830 fs/io_uring.c:3268 io_write+0x4fe/0x620 fs/io_uring.c:4032 io_issue_sqe+0xabd/0x8200 fs/io_uring.c:7177 io_wq_submit_work+0x1d5/0x380 fs/io_uring.c:7340 io_worker_handle_work+0x528/0xc20 fs/io-wq.c:595 io_wqe_worker+0x1e6/0x540 fs/io-wq.c:642 ret_from_fork+0x1f/0x30 value changed: 0x00ac4100 -> 0x00ad0100 Reported by Kernel Concurrency Sanitizer on: CPU: 1 PID: 15914 Comm: iou-wrk-15903 Not tainted 5.17.0-syzkaller-01442-gb47d5a4f6b8d-dirty #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 ==================================================================