syzbot

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BUG: KCSAN: data-race in evdev_pass_values / evdev_read

write to 0xffff888104580808 of 4 bytes by task 13371 on cpu 0:
 __pass_event drivers/input/evdev.c:239 [inline]
 evdev_pass_values+0x3ac/0x510 drivers/input/evdev.c:278
 evdev_events+0x90/0xd0 drivers/input/evdev.c:306
 input_pass_values+0x11a/0x390 drivers/input/input.c:127
 input_event_dispose+0x232/0x300 drivers/input/input.c:341
 input_handle_event+0xac4/0xb00 drivers/input/input.c:369
 input_inject_event+0xd1/0x110 drivers/input/input.c:423
 evdev_write+0x33f/0x440 drivers/input/evdev.c:528
 vfs_write+0x27d/0x920 fs/read_write.c:677
 ksys_write+0xe8/0x1b0 fs/read_write.c:731
 __do_sys_write fs/read_write.c:742 [inline]
 __se_sys_write fs/read_write.c:739 [inline]
 __x64_sys_write+0x42/0x50 fs/read_write.c:739
 x64_sys_call+0x287e/0x2dc0 arch/x86/include/generated/asm/syscalls_64.h:2
 do_syscall_x64 arch/x86/entry/common.c:52 [inline]
 do_syscall_64+0xc9/0x1c0 arch/x86/entry/common.c:83
 entry_SYSCALL_64_after_hwframe+0x77/0x7f

read to 0xffff888104580808 of 4 bytes by task 2985 on cpu 1:
 evdev_read+0x1c4/0x780 drivers/input/evdev.c:572
 vfs_read+0x19b/0x6f0 fs/read_write.c:563
 ksys_read+0xe8/0x1b0 fs/read_write.c:708
 __do_sys_read fs/read_write.c:717 [inline]
 __se_sys_read fs/read_write.c:715 [inline]
 __x64_sys_read+0x42/0x50 fs/read_write.c:715
 x64_sys_call+0x2874/0x2dc0 arch/x86/include/generated/asm/syscalls_64.h:1
 do_syscall_x64 arch/x86/entry/common.c:52 [inline]
 do_syscall_64+0xc9/0x1c0 arch/x86/entry/common.c:83
 entry_SYSCALL_64_after_hwframe+0x77/0x7f

value changed: 0x00000003 -> 0x00000005

Reported by Kernel Concurrency Sanitizer on:
CPU: 1 UID: 0 PID: 2985 Comm: acpid Not tainted 6.14.0-rc5-syzkaller-00214-g21e4543a2e2f #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2025
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