syzbot

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BUG: KCSAN: data-race in evdev_pass_values / evdev_poll

write to 0xffff888103bc6808 of 4 bytes by task 7901 on cpu 1:
 __pass_event drivers/input/evdev.c:239 [inline]
 evdev_pass_values+0x3b7/0x510 drivers/input/evdev.c:278
 evdev_events+0x91/0xd0 drivers/input/evdev.c:306
 input_to_handler drivers/input/input.c:127 [inline]
 input_pass_values+0x37a/0x8f0 drivers/input/input.c:159
 input_event_dispose+0x243/0x310 drivers/input/input.c:374
 input_handle_event+0x6a3/0xa70 drivers/input/input.c:402
 input_inject_event+0xbc/0xe0 drivers/input/input.c:461
 evdev_write+0x326/0x400 drivers/input/evdev.c:530
 vfs_write+0x25c/0x760 fs/read_write.c:576
 ksys_write+0xe8/0x1a0 fs/read_write.c:631
 __do_sys_write fs/read_write.c:643 [inline]
 __se_sys_write fs/read_write.c:640 [inline]
 __x64_sys_write+0x3e/0x50 fs/read_write.c:640
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x2b/0x70 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x63/0xcd

read to 0xffff888103bc6808 of 4 bytes by task 1421 on cpu 0:
 evdev_poll+0xdd/0x110 drivers/input/evdev.c:623
 vfs_poll include/linux/poll.h:88 [inline]
 do_select+0x951/0x1020 fs/select.c:538
 core_sys_select+0x368/0x520 fs/select.c:681
 do_pselect fs/select.c:763 [inline]
 __do_sys_pselect6+0x1f4/0x250 fs/select.c:804
 __se_sys_pselect6 fs/select.c:795 [inline]
 __x64_sys_pselect6+0x74/0x80 fs/select.c:795
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x2b/0x70 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x63/0xcd

value changed: 0x00000023 -> 0x00000025

Reported by Kernel Concurrency Sanitizer on:
CPU: 0 PID: 1421 Comm: acpid Not tainted 6.0.0-rc3-syzkaller-00007-gdcf8e5633e2e-dirty #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/22/2022
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