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BUG: KCSAN: data-race in do_select / pollwake

read to 0xffffc90001613a00 of 4 bytes by task 14122 on cpu 0:
 poll_schedule_timeout fs/select.c:243 [inline]
 do_select+0xeb0/0xfa0 fs/select.c:607
 core_sys_select+0x362/0x530 fs/select.c:681
 do_pselect fs/select.c:763 [inline]
 __do_sys_pselect6 fs/select.c:804 [inline]
 __se_sys_pselect6+0x213/0x280 fs/select.c:795
 __x64_sys_pselect6+0x78/0x90 fs/select.c:795
 x64_sys_call+0xe7b/0x2d30 arch/x86/include/generated/asm/syscalls_64.h:271
 do_syscall_x64 arch/x86/entry/common.c:52 [inline]
 do_syscall_64+0xcd/0x1d0 arch/x86/entry/common.c:83
 entry_SYSCALL_64_after_hwframe+0x77/0x7f

write to 0xffffc90001613a00 of 4 bytes by task 14125 on cpu 1:
 __pollwake fs/select.c:198 [inline]
 pollwake+0xbe/0x110 fs/select.c:218
 __wake_up_common kernel/sched/wait.c:89 [inline]
 __wake_up_common_lock kernel/sched/wait.c:106 [inline]
 __wake_up+0x65/0xb0 kernel/sched/wait.c:127
 tty_ldisc_lock drivers/tty/tty_ldisc.c:311 [inline]
 tty_ldisc_hangup+0x1b1/0x370 drivers/tty/tty_ldisc.c:712
 __tty_hangup+0x3c6/0x540 drivers/tty/tty_io.c:630
 tty_vhangup drivers/tty/tty_io.c:700 [inline]
 tty_ioctl+0x613/0xbe0 drivers/tty/tty_io.c:2743
 vfs_ioctl fs/ioctl.c:51 [inline]
 __do_sys_ioctl fs/ioctl.c:904 [inline]
 __se_sys_ioctl+0xd3/0x150 fs/ioctl.c:890
 __x64_sys_ioctl+0x43/0x50 fs/ioctl.c:890
 x64_sys_call+0x155d/0x2d30 arch/x86/include/generated/asm/syscalls_64.h:17
 do_syscall_x64 arch/x86/entry/common.c:52 [inline]
 do_syscall_64+0xcd/0x1d0 arch/x86/entry/common.c:83
 entry_SYSCALL_64_after_hwframe+0x77/0x7f

value changed: 0x00000001 -> 0x00000000

Reported by Kernel Concurrency Sanitizer on:
CPU: 1 PID: 14125 Comm: syz-executor.2 Not tainted 6.9.0-rc3-syzkaller-00208-g586b5dfb51b9 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/27/2024
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