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BUG: KCSAN: data-race in io_req_defer_failed / io_wq_free_work

write to 0xffff8881208c4648 of 8 bytes by task 14612 on cpu 1:
 io_req_defer_failed+0x6e/0x240 io_uring/io_uring.c:1047
 io_req_task_cancel+0x6e/0x80 io_uring/io_uring.c:1498
 io_handle_tw_list+0x1ef/0x240 io_uring/io_uring.c:1198
 tctx_task_work_run+0x6c/0x1b0 io_uring/io_uring.c:1270
 tctx_task_work+0x40/0x80 io_uring/io_uring.c:1288
 task_work_run+0x13a/0x1a0 kernel/task_work.c:180
 get_signal+0xeee/0x1080 kernel/signal.c:2683
 arch_do_signal_or_restart+0x95/0x4b0 arch/x86/kernel/signal.c:310
 exit_to_user_mode_loop kernel/entry/common.c:111 [inline]
 exit_to_user_mode_prepare include/linux/entry-common.h:328 [inline]
 __syscall_exit_to_user_mode_work kernel/entry/common.c:207 [inline]
 syscall_exit_to_user_mode+0x59/0x130 kernel/entry/common.c:218
 do_syscall_64+0xda/0x1d0 arch/x86/entry/common.c:89
 entry_SYSCALL_64_after_hwframe+0x77/0x7f

read to 0xffff8881208c4648 of 8 bytes by task 14619 on cpu 0:
 req_ref_put_and_test io_uring/refs.h:22 [inline]
 io_wq_free_work+0x24/0x1b0 io_uring/io_uring.c:1937
 io_worker_handle_work+0x4e4/0xa20 io_uring/io-wq.c:599
 io_wq_worker+0x20c/0x730 io_uring/io-wq.c:649
 ret_from_fork+0x4b/0x60 arch/x86/kernel/process.c:147
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244

value changed: 0x00000000002c2058 -> 0x00000000006c2118

Reported by Kernel Concurrency Sanitizer on:
CPU: 0 PID: 14619 Comm: iou-wrk-14612 Not tainted 6.9.0-syzkaller-01049-g8815da98e06a #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/02/2024
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