syzbot

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BUG: KCSAN: data-race in evdev_pass_values / evdev_poll

write to 0xffff888105982008 of 4 bytes by interrupt on cpu 0:
 __pass_event drivers/input/evdev.c:239 [inline]
 evdev_pass_values+0x387/0x4e0 drivers/input/evdev.c:278
 evdev_events+0x8e/0xd0 drivers/input/evdev.c:306
 input_pass_values+0x123/0x390 drivers/input/input.c:128
 input_event_dispose+0x2c1/0x320 drivers/input/input.c:353
 input_handle_event+0x9e8/0xa20 drivers/input/input.c:370
 input_inject_event+0xba/0x100 drivers/input/input.c:424
 input_leds_brightness_set+0x59/0x70 drivers/input/input-leds.c:69
 __led_set_brightness drivers/leds/led-core.c:52 [inline]
 led_set_brightness_nopm drivers/leds/led-core.c:334 [inline]
 led_set_brightness_nosleep drivers/leds/led-core.c:368 [inline]
 led_set_brightness+0x9f/0x160 drivers/leds/led-core.c:327
 led_trigger_event+0x59/0x90 drivers/leds/led-triggers.c:420
 kbd_propagate_led_state drivers/tty/vt/keyboard.c:1118 [inline]
 kbd_bh+0x18f/0x1e0 drivers/tty/vt/keyboard.c:1297
 tasklet_action_common+0xfb/0x2b0 kernel/softirq.c:938
 handle_softirqs+0xb9/0x280 kernel/softirq.c:622
 run_ksoftirqd+0x1c/0x30 kernel/softirq.c:1076
 smpboot_thread_fn+0x32a/0x510 kernel/smpboot.c:160
 kthread+0x22a/0x280 kernel/kthread.c:436
 ret_from_fork+0x146/0x330 arch/x86/kernel/process.c:158
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245

read to 0xffff888105982008 of 4 bytes by task 2967 on cpu 1:
 evdev_poll+0xc4/0x100 drivers/input/evdev.c:621
 vfs_poll include/linux/poll.h:82 [inline]
 select_poll_one fs/select.c:480 [inline]
 do_select+0x94e/0xfa0 fs/select.c:536
 core_sys_select+0x45d/0x730 fs/select.c:677
 do_pselect fs/select.c:759 [inline]
 __do_sys_pselect6 fs/select.c:798 [inline]
 __se_sys_pselect6+0x23c/0x2a0 fs/select.c:789
 __x64_sys_pselect6+0x78/0x90 fs/select.c:789
 x64_sys_call+0x8d5/0x3020 arch/x86/include/generated/asm/syscalls_64.h:271
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0x12c/0x3b0 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f

value changed: 0x00000007 -> 0x00000010

Reported by Kernel Concurrency Sanitizer on:
CPU: 1 UID: 0 PID: 2967 Comm: acpid Tainted: G        W           syzkaller #0 PREEMPT(full) 
Tainted: [W]=WARN
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/18/2026
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