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BUG: KCSAN: data-race in do_select / pollwake

write to 0xffffc900015179e0 of 4 bytes by task 6007 on cpu 1:
 __pollwake fs/select.c:195 [inline]
 pollwake+0xb6/0x100 fs/select.c:215
 __wake_up_common kernel/sched/wait.c:89 [inline]
 __wake_up_common_lock kernel/sched/wait.c:106 [inline]
 __wake_up_sync_key+0x52/0x80 kernel/sched/wait.c:173
 anon_pipe_write+0x8ba/0xaa0 fs/pipe.c:594
 io_write+0x612/0xd40 io_uring/rw.c:1160
 __io_issue_sqe+0xfe/0x2e0 io_uring/io_uring.c:1735
 io_issue_sqe+0x53/0x970 io_uring/io_uring.c:1758
 io_queue_sqe io_uring/io_uring.c:1965 [inline]
 io_submit_sqe io_uring/io_uring.c:2221 [inline]
 io_submit_sqes+0x667/0xfd0 io_uring/io_uring.c:2334
 __do_sys_io_uring_enter io_uring/io_uring.c:3401 [inline]
 __se_sys_io_uring_enter+0x1c1/0x1b70 io_uring/io_uring.c:3335
 __x64_sys_io_uring_enter+0x78/0x90 io_uring/io_uring.c:3335
 x64_sys_call+0x28c8/0x2fb0 arch/x86/include/generated/asm/syscalls_64.h:427
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0xd2/0x200 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f

read to 0xffffc900015179e0 of 4 bytes by task 3296 on cpu 0:
 poll_schedule_timeout fs/select.c:240 [inline]
 do_select+0xe48/0xf50 fs/select.c:603
 core_sys_select+0x3d7/0x6e0 fs/select.c:677
 do_pselect fs/select.c:759 [inline]
 __do_sys_pselect6 fs/select.c:802 [inline]
 __se_sys_pselect6+0x216/0x280 fs/select.c:793
 __x64_sys_pselect6+0x78/0x90 fs/select.c:793
 x64_sys_call+0x1caa/0x2fb0 arch/x86/include/generated/asm/syscalls_64.h:271
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0xd2/0x200 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f

value changed: 0x00000000 -> 0x00000001

Reported by Kernel Concurrency Sanitizer on:
CPU: 0 UID: 0 PID: 3296 Comm: syz-executor Not tainted 6.16.0-rc1-syzkaller-00005-g488ef3560196 #0 PREEMPT(voluntary) 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025
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