================================================================== BUG: KCSAN: data-race in io_wq_worker_running / io_wqe_activate_free_worker write to 0xffff888100cb3e44 of 4 bytes by task 22752 on cpu 0: io_wq_worker_running+0x64/0xa0 io_uring/io-wq.c:685 schedule_timeout+0xcc/0x230 kernel/time/timer.c:2167 io_wqe_worker+0x4bd/0x8a0 io_uring/io-wq.c:650 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:308 read to 0xffff888100cb3e44 of 4 bytes by task 22747 on cpu 1: io_wqe_get_acct io_uring/io-wq.c:175 [inline] io_wqe_activate_free_worker+0xf4/0x270 io_uring/io-wq.c:274 io_wqe_enqueue+0x268/0x470 io_uring/io-wq.c:933 io_wq_enqueue+0x35/0x40 io_uring/io-wq.c:966 io_queue_iowq+0x1d1/0x310 io_uring/io_uring.c:475 io_req_task_submit+0xf4/0x130 io_uring/io_uring.c:1423 handle_tw_list io_uring/io_uring.c:1184 [inline] tctx_task_work+0x1fe/0x4d0 io_uring/io_uring.c:1246 task_work_run+0x123/0x160 kernel/task_work.c:179 get_signal+0xe64/0xff0 kernel/signal.c:2635 arch_do_signal_or_restart+0x89/0x2a0 arch/x86/kernel/signal.c:306 exit_to_user_mode_loop+0x6f/0xe0 kernel/entry/common.c:168 exit_to_user_mode_prepare+0x6c/0xb0 kernel/entry/common.c:204 irqentry_exit_to_user_mode+0x9/0x20 kernel/entry/common.c:310 irqentry_exit+0x12/0x40 kernel/entry/common.c:413 asm_sysvec_reschedule_ipi+0x1a/0x20 arch/x86/include/asm/idtentry.h:650 value changed: 0x0000000d -> 0x0000000b Reported by Kernel Concurrency Sanitizer on: CPU: 1 PID: 22747 Comm: syz-executor.5 Not tainted 6.3.0-rc5-syzkaller-00202-ga79d5c76f705 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/30/2023 ================================================================== loop5: detected capacity change from 0 to 32768 loop5: p1 p2 p3 loop5: p2 size 2147418112 extends beyond EOD, truncated