================================================================== BUG: KCSAN: data-race in io_clean_op / kiocb_done write to 0xffff88812d963358 of 4 bytes by task 16773 on cpu 0: io_clean_op+0x3aa/0x3e0 fs/io_uring.c:6539 io_req_complete_state fs/io_uring.c:1828 [inline] io_req_task_complete+0xb2/0x1e0 fs/io_uring.c:2662 tctx_task_work+0x233/0x490 fs/io_uring.c:2143 task_work_run+0xae/0x130 kernel/task_work.c:164 tracehook_notify_signal include/linux/tracehook.h:212 [inline] handle_signal_work kernel/entry/common.c:146 [inline] exit_to_user_mode_loop kernel/entry/common.c:172 [inline] exit_to_user_mode_prepare+0xf8/0x190 kernel/entry/common.c:209 __syscall_exit_to_user_mode_work kernel/entry/common.c:291 [inline] syscall_exit_to_user_mode+0x20/0x40 kernel/entry/common.c:302 do_syscall_64+0x49/0x90 arch/x86/entry/common.c:86 entry_SYSCALL_64_after_hwframe+0x44/0xae read to 0xffff88812d963358 of 4 bytes by task 16825 on cpu 1: kiocb_done+0x30b/0x5a0 fs/io_uring.c:2931 io_write fs/io_uring.c:3597 [inline] io_issue_sqe+0x4ec7/0x6270 fs/io_uring.c:6563 io_wq_submit_work+0xf5/0x2c0 fs/io_uring.c:6707 io_worker_handle_work+0x97d/0xba0 fs/io-wq.c:560 io_wqe_worker+0x184/0x4b0 fs/io-wq.c:609 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:295 value changed: 0x00180300 -> 0x00110100 Reported by Kernel Concurrency Sanitizer on: CPU: 1 PID: 16825 Comm: iou-wrk-16773 Not tainted 5.14.0-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 ==================================================================