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BUG: KCSAN: data-race in __io_async_wake / futex_wait_queue_me

read-write to 0xffff888130f48064 of 4 bytes by task 9947 on cpu 0:
 freezer_count include/linux/freezer.h:121 [inline]
 freezable_schedule include/linux/freezer.h:173 [inline]
 futex_wait_queue_me+0x198/0x240 kernel/futex.c:2589
 futex_wait+0x145/0x390 kernel/futex.c:2691
 do_futex+0x10df/0x2120 kernel/futex.c:3750
 __do_sys_futex kernel/futex.c:3813 [inline]
 __se_sys_futex+0x2a8/0x390 kernel/futex.c:3779
 __x64_sys_futex+0x74/0x80 kernel/futex.c:3779
 do_syscall_64+0x39/0x80 arch/x86/entry/common.c:46
 entry_SYSCALL_64_after_hwframe+0x44/0xa9

read to 0xffff888130f48064 of 4 bytes by task 9948 on cpu 1:
 io_req_task_work_add fs/io_uring.c:1990 [inline]
 __io_async_wake+0x188/0x370 fs/io_uring.c:4860
 io_async_wake+0x77/0x150 fs/io_uring.c:5086
 __wake_up_common+0xbc/0x130 kernel/sched/wait.c:93
 __wake_up_common_lock kernel/sched/wait.c:123 [inline]
 __wake_up+0x80/0xc0 kernel/sched/wait.c:142
 vb2_buffer_done+0x45d/0x480 drivers/media/common/videobuf2/videobuf2-core.c:1031
 vivid_thread_sdr_cap_tick drivers/media/test-drivers/vivid/vivid-sdr-cap.c:112 [inline]
 vivid_thread_sdr_cap+0x4fc/0x660 drivers/media/test-drivers/vivid/vivid-sdr-cap.c:178
 kthread+0x1fa/0x220 kernel/kthread.c:292
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:296

Reported by Kernel Concurrency Sanitizer on:
CPU: 1 PID: 9948 Comm: vivid-007-sdr-c Not tainted 5.10.0-rc1-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
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