==================================================================
BUG: KCSAN: data-race in create_io_worker / io_wqe_enqueue

write to 0xffff8881360a6044 of 4 bytes by task 23593 on cpu 0:
 create_io_worker+0x35d/0x380 fs/io-wq.c:605
 io_wq_check_workers+0x2a0/0x310 fs/io-wq.c:674
 io_wq_manager+0xbc/0x630 fs/io-wq.c:711
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:294

read to 0xffff8881360a6044 of 4 bytes by task 23592 on cpu 1:
 io_wqe_wake_worker fs/io-wq.c:254 [inline]
 io_wqe_enqueue+0x490/0x5a0 fs/io-wq.c:810
 io_wq_enqueue+0x3a/0x40 fs/io-wq.c:817
 io_queue_async_work+0x345/0x570 fs/io_uring.c:1219
 __io_queue_sqe+0x407/0x4e0 fs/io_uring.c:6218
 io_queue_sqe+0x6d/0x160 fs/io_uring.c:6259
 io_submit_sqe+0x158c/0x31b0 fs/io_uring.c:6423
 io_submit_sqes+0x609/0xab0 fs/io_uring.c:6537
 __do_sys_io_uring_enter fs/io_uring.c:9092 [inline]
 __se_sys_io_uring_enter+0x222/0xc30 fs/io_uring.c:9031
 __x64_sys_io_uring_enter+0x74/0x80 fs/io_uring.c:9031
 do_syscall_64+0x39/0x80 arch/x86/entry/common.c:46
 entry_SYSCALL_64_after_hwframe+0x44/0xae

Reported by Kernel Concurrency Sanitizer on:
CPU: 1 PID: 23592 Comm: syz-executor.3 Not tainted 5.12.0-rc2-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
==================================================================