syzbot

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BUG: KCSAN: data-race in evdev_pass_values / evdev_poll

write to 0xffff888104ef7808 of 4 bytes by task 11162 on cpu 0:
 __pass_event drivers/input/evdev.c:239 [inline]
 evdev_pass_values+0x3a8/0x510 drivers/input/evdev.c:278
 evdev_events+0x90/0xd0 drivers/input/evdev.c:306
 input_to_handler drivers/input/input.c:129 [inline]
 input_pass_values+0x305/0x770 drivers/input/input.c:161
 input_event_dispose+0x243/0x310 drivers/input/input.c:376
 input_handle_event+0xaf1/0xb80 drivers/input/input.c:404
 input_inject_event+0xd1/0xf0 drivers/input/input.c:463
 evdev_write+0x332/0x410 drivers/input/evdev.c:530
 vfs_write+0x26e/0x780 fs/read_write.c:582
 ksys_write+0xeb/0x1a0 fs/read_write.c:637
 __do_sys_write fs/read_write.c:649 [inline]
 __se_sys_write fs/read_write.c:646 [inline]
 __x64_sys_write+0x42/0x50 fs/read_write.c:646
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x41/0xc0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x63/0xcd

read to 0xffff888104ef7808 of 4 bytes by task 2730 on cpu 1:
 evdev_poll+0xe1/0x110 drivers/input/evdev.c:623
 vfs_poll include/linux/poll.h:88 [inline]
 do_select+0x94e/0xf90 fs/select.c:538
 core_sys_select+0x361/0x520 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
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x41/0xc0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x63/0xcd

value changed: 0x0000001e -> 0x00000020

Reported by Kernel Concurrency Sanitizer on:
CPU: 1 PID: 2730 Comm: acpid Not tainted 6.4.0-rc7-syzkaller-00072-gdad9774deaf1 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/27/2023
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