syzbot

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BUG: KCSAN: data-race in evdev_pass_values / evdev_read

write to 0xffff8881048fe008 of 4 bytes by task 12154 on cpu 0:
 __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:128 [inline]
 input_pass_values+0x37a/0x8f0 drivers/input/input.c:160
 input_event_dispose+0x243/0x310 drivers/input/input.c:375
 input_handle_event+0x6a3/0xa70 drivers/input/input.c:403
 input_inject_event+0xbc/0xe0 drivers/input/input.c:462
 evdev_write+0x326/0x400 drivers/input/evdev.c:530
 vfs_write+0x25c/0x760 fs/read_write.c:582
 ksys_write+0xe8/0x1a0 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+0x3e/0x50 fs/read_write.c:646
 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 0xffff8881048fe008 of 4 bytes by task 2722 on cpu 1:
 evdev_read+0x1c5/0x7a0 drivers/input/evdev.c:574
 vfs_read+0x198/0x560 fs/read_write.c:468
 ksys_read+0xe8/0x1a0 fs/read_write.c:613
 __do_sys_read fs/read_write.c:623 [inline]
 __se_sys_read fs/read_write.c:621 [inline]
 __x64_sys_read+0x3e/0x50 fs/read_write.c:621
 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: 0x0000000c -> 0x00000010

Reported by Kernel Concurrency Sanitizer on:
CPU: 1 PID: 2722 Comm: acpid Not tainted 6.2.0-rc2-syzkaller-00203-g1f5abbd77e2c-dirty #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/26/2022
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