================================================================== BUG: KCSAN: data-race in io_worker_handle_work / io_wqe_wake_worker write to 0xffff8880871e0444 of 4 bytes by task 13269 on cpu 1: __io_worker_busy fs/io-wq.c:351 [inline] io_worker_handle_work+0x531/0xcf0 fs/io-wq.c:503 io_wqe_worker+0x1f2/0x860 fs/io-wq.c:569 kthread+0x20d/0x230 kernel/kthread.c:292 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:294 read to 0xffff8880871e0444 of 4 bytes by task 13237 on cpu 0: io_wqe_wake_worker+0x160/0x220 fs/io-wq.c:293 io_wqe_enqueue+0x2b8/0x340 fs/io-wq.c:831 io_wq_enqueue+0x3a/0x40 fs/io-wq.c:838 __io_queue_async_work fs/io_uring.c:1198 [inline] io_queue_async_work+0x16b/0x3c0 fs/io_uring.c:1208 __io_queue_sqe+0x4a3/0x670 fs/io_uring.c:6194 io_queue_sqe+0x81/0x220 fs/io_uring.c:6257 io_submit_sqe+0x333/0x550 fs/io_uring.c:6327 io_submit_sqes+0x8c6/0xfb0 fs/io_uring.c:6521 __do_sys_io_uring_enter fs/io_uring.c:8349 [inline] __se_sys_io_uring_enter+0x1e8/0x790 fs/io_uring.c:8308 __x64_sys_io_uring_enter+0x74/0x80 fs/io_uring.c:8308 do_syscall_64+0x39/0x80 arch/x86/entry/common.c:46 entry_SYSCALL_64_after_hwframe+0x44/0xa9 Reported by Kernel Concurrency Sanitizer on: CPU: 0 PID: 13237 Comm: syz-executor.0 Not tainted 5.9.0-rc7-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 ==================================================================