======================================================== WARNING: possible irq lock inversion dependency detected 6.15.0-rc7-syzkaller #0 Not tainted -------------------------------------------------------- kworker/0:2/21675 just changed the state of lock: ffff88802b15e230 (&dev->event_lock#2){..-.}-{3:3}, at: class_spinlock_irqsave_constructor include/linux/spinlock.h:585 [inline] ffff88802b15e230 (&dev->event_lock#2){..-.}-{3:3}, at: input_inject_event+0x9f/0x390 drivers/input/input.c:418 but this lock took another, SOFTIRQ-READ-unsafe lock in the past: (tasklist_lock){.+.+}-{3:3} and interrupts could create inverse lock ordering between them. other info that might help us debug this: Chain exists of: &dev->event_lock#2 --> &client->buffer_lock --> tasklist_lock Possible interrupt unsafe locking scenario: CPU0 CPU1 ---- ---- lock(tasklist_lock); local_irq_disable(); lock(&dev->event_lock#2); lock(&client->buffer_lock); lock(&dev->event_lock#2); *** DEADLOCK *** 4 locks held by kworker/0:2/21675: #0: ffff88801b478d48 ((wq_completion)events){+.+.}-{0:0}, at: process_one_work+0x12a2/0x1b70 kernel/workqueue.c:3213 #1: ffffc9000356fd18 (console_work){+.+.}-{0:0}, at: process_one_work+0x929/0x1b70 kernel/workqueue.c:3214 #2: ffffffff8e3ad480 (console_lock){+.+.}-{0:0}, at: console_callback+0x62/0x4c0 drivers/tty/vt/vt.c:3120 #3: ffffffff8e3bfc00 (rcu_read_lock){....}-{1:3}, at: rcu_lock_acquire include/linux/rcupdate.h:331 [inline] #3: ffffffff8e3bfc00 (rcu_read_lock){....}-{1:3}, at: rcu_read_lock include/linux/rcupdate.h:841 [inline] #3: ffffffff8e3bfc00 (rcu_read_lock){....}-{1:3}, at: led_trigger_event drivers/leds/led-triggers.c:405 [inline] #3: ffffffff8e3bfc00 (rcu_read_lock){....}-{1:3}, at: led_trigger_event+0x61/0x270 drivers/leds/led-triggers.c:395 the shortest dependencies between 2nd lock and 1st lock: -> (tasklist_lock){.+.+}-{3:3} { HARDIRQ-ON-R at: lock_acquire kernel/locking/lockdep.c:5866 [inline] lock_acquire+0x179/0x350 kernel/locking/lockdep.c:5823 __raw_read_lock include/linux/rwlock_api_smp.h:150 [inline] _raw_read_lock+0x5f/0x70 kernel/locking/spinlock.c:228 __do_wait+0x105/0x890 kernel/exit.c:1662 do_wait+0x21e/0x5a0 kernel/exit.c:1706 kernel_wait+0x9f/0x160 kernel/exit.c:1882 call_usermodehelper_exec_sync kernel/umh.c:136 [inline] call_usermodehelper_exec_work+0xf1/0x170 kernel/umh.c:163 process_one_work+0x9cf/0x1b70 kernel/workqueue.c:3238 process_scheduled_works kernel/workqueue.c:3319 [inline] worker_thread+0x6c8/0xf10 kernel/workqueue.c:3400 kthread+0x3c2/0x780 kernel/kthread.c:464 ret_from_fork+0x45/0x80 arch/x86/kernel/process.c:153 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245 SOFTIRQ-ON-R at: lock_acquire kernel/locking/lockdep.c:5866 [inline] lock_acquire+0x179/0x350 kernel/locking/lockdep.c:5823 __raw_read_lock include/linux/rwlock_api_smp.h:150 [inline] _raw_read_lock+0x5f/0x70 kernel/locking/spinlock.c:228 __do_wait+0x105/0x890 kernel/exit.c:1662 do_wait+0x21e/0x5a0 kernel/exit.c:1706 kernel_wait+0x9f/0x160 kernel/exit.c:1882 call_usermodehelper_exec_sync kernel/umh.c:136 [inline] call_usermodehelper_exec_work+0xf1/0x170 kernel/umh.c:163 process_one_work+0x9cf/0x1b70 kernel/workqueue.c:3238 process_scheduled_works kernel/workqueue.c:3319 [inline] worker_thread+0x6c8/0xf10 kernel/workqueue.c:3400 kthread+0x3c2/0x780 kernel/kthread.c:464 ret_from_fork+0x45/0x80 arch/x86/kernel/process.c:153 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245 INITIAL USE at: lock_acquire kernel/locking/lockdep.c:5866 [inline] lock_acquire+0x179/0x350 kernel/locking/lockdep.c:5823 __raw_write_lock_irq include/linux/rwlock_api_smp.h:195 [inline] _raw_write_lock_irq+0x36/0x50 kernel/locking/spinlock.c:326 copy_process+0x3f09/0x91b0 kernel/fork.c:2561 kernel_clone+0xfc/0x960 kernel/fork.c:2845 user_mode_thread+0xc7/0x110 kernel/fork.c:2923 rest_init+0x23/0x2b0 init/main.c:708 start_kernel+0x3e9/0x4d0 init/main.c:1099 x86_64_start_reservations+0x18/0x30 arch/x86/kernel/head64.c:513 x86_64_start_kernel+0xb0/0xc0 arch/x86/kernel/head64.c:494 common_startup_64+0x13e/0x148 INITIAL READ USE at: lock_acquire kernel/locking/lockdep.c:5866 [inline] lock_acquire+0x179/0x350 kernel/locking/lockdep.c:5823 __raw_read_lock include/linux/rwlock_api_smp.h:150 [inline] _raw_read_lock+0x5f/0x70 kernel/locking/spinlock.c:228 __do_wait+0x105/0x890 kernel/exit.c:1662 do_wait+0x21e/0x5a0 kernel/exit.c:1706 kernel_wait+0x9f/0x160 kernel/exit.c:1882 call_usermodehelper_exec_sync kernel/umh.c:136 [inline] call_usermodehelper_exec_work+0xf1/0x170 kernel/umh.c:163 process_one_work+0x9cf/0x1b70 kernel/workqueue.c:3238 process_scheduled_works kernel/workqueue.c:3319 [inline] worker_thread+0x6c8/0xf10 kernel/workqueue.c:3400 kthread+0x3c2/0x780 kernel/kthread.c:464 ret_from_fork+0x45/0x80 arch/x86/kernel/process.c:153 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245 } ... key at: [] tasklist_lock+0x18/0x40 ... acquired at: __raw_read_lock include/linux/rwlock_api_smp.h:150 [inline] _raw_read_lock+0x5f/0x70 kernel/locking/spinlock.c:228 send_sigio+0xb8/0x3e0 fs/fcntl.c:921 dnotify_handle_event+0x15e/0x2b0 fs/notify/dnotify/dnotify.c:113 fsnotify_handle_inode_event.isra.0+0x1df/0x3f0 fs/notify/fsnotify.c:321 fsnotify_handle_event fs/notify/fsnotify.c:376 [inline] send_to_group fs/notify/fsnotify.c:424 [inline] fsnotify+0x13d6/0x1dc0 fs/notify/fsnotify.c:641 fsnotify_name include/linux/fsnotify.h:55 [inline] fsnotify_name include/linux/fsnotify.h:48 [inline] fsnotify_dirent include/linux/fsnotify.h:61 [inline] fsnotify_mkdir include/linux/fsnotify.h:429 [inline] vfs_mkdir+0x71d/0x8c0 fs/namei.c:4367 do_mkdirat+0x304/0x3e0 fs/namei.c:4392 __do_sys_mkdirat fs/namei.c:4409 [inline] __se_sys_mkdirat fs/namei.c:4407 [inline] __x64_sys_mkdirat+0x83/0xb0 fs/namei.c:4407 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0xcd/0x260 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f -> (&f_owner->lock){....}-{3:3} { INITIAL USE at: lock_acquire kernel/locking/lockdep.c:5866 [inline] lock_acquire+0x179/0x350 kernel/locking/lockdep.c:5823 __raw_write_lock_irq include/linux/rwlock_api_smp.h:195 [inline] _raw_write_lock_irq+0x36/0x50 kernel/locking/spinlock.c:326 __f_setown+0x61/0x3c0 fs/fcntl.c:136 fcntl_dirnotify+0x78f/0xb50 fs/notify/dnotify/dnotify.c:369 do_fcntl+0xe6b/0x1590 fs/fcntl.c:539 __do_sys_fcntl fs/fcntl.c:591 [inline] __se_sys_fcntl fs/fcntl.c:576 [inline] __x64_sys_fcntl+0x170/0x200 fs/fcntl.c:576 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0xcd/0x260 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f INITIAL READ USE at: lock_acquire kernel/locking/lockdep.c:5866 [inline] lock_acquire+0x179/0x350 kernel/locking/lockdep.c:5823 __raw_read_lock_irqsave include/linux/rwlock_api_smp.h:160 [inline] _raw_read_lock_irqsave+0x74/0x90 kernel/locking/spinlock.c:236 send_sigio+0x31/0x3e0 fs/fcntl.c:907 dnotify_handle_event+0x15e/0x2b0 fs/notify/dnotify/dnotify.c:113 fsnotify_handle_inode_event.isra.0+0x1df/0x3f0 fs/notify/fsnotify.c:321 fsnotify_handle_event fs/notify/fsnotify.c:376 [inline] send_to_group fs/notify/fsnotify.c:424 [inline] fsnotify+0x13d6/0x1dc0 fs/notify/fsnotify.c:641 fsnotify_parent include/linux/fsnotify.h:99 [inline] fsnotify_dentry include/linux/fsnotify.h:108 [inline] fsnotify_change include/linux/fsnotify.h:520 [inline] notify_change+0xfd1/0x1230 fs/attr.c:557 vfs_utimes+0x407/0x820 fs/utimes.c:66 do_utimes_path fs/utimes.c:99 [inline] do_utimes+0x123/0x2a0 fs/utimes.c:140 __do_sys_utimensat fs/utimes.c:159 [inline] __se_sys_utimensat fs/utimes.c:143 [inline] __x64_sys_utimensat+0x1c6/0x290 fs/utimes.c:143 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0xcd/0x260 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f } ... key at: [] __key.1+0x0/0x40 ... acquired at: __raw_read_lock_irqsave include/linux/rwlock_api_smp.h:160 [inline] _raw_read_lock_irqsave+0x74/0x90 kernel/locking/spinlock.c:236 send_sigio+0x31/0x3e0 fs/fcntl.c:907 kill_fasync_rcu fs/fcntl.c:1133 [inline] kill_fasync fs/fcntl.c:1148 [inline] kill_fasync+0x214/0x510 fs/fcntl.c:1141 lease_break_callback+0x23/0x30 fs/locks.c:558 __break_lease+0x671/0x1810 fs/locks.c:1592 break_lease include/linux/filelock.h:441 [inline] do_dentry_open+0x6e1/0x1c10 fs/open.c:947 vfs_open+0x82/0x3f0 fs/open.c:1086 dentry_open+0x71/0xd0 fs/open.c:1109 do_mq_open+0x4c1/0x8b0 ipc/mqueue.c:924 __do_sys_mq_open ipc/mqueue.c:951 [inline] __se_sys_mq_open ipc/mqueue.c:944 [inline] __x64_sys_mq_open+0x155/0x1e0 ipc/mqueue.c:944 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0xcd/0x260 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f -> (&new->fa_lock){....}-{3:3} { INITIAL USE at: lock_acquire kernel/locking/lockdep.c:5866 [inline] lock_acquire+0x179/0x350 kernel/locking/lockdep.c:5823 __raw_write_lock_irq include/linux/rwlock_api_smp.h:195 [inline] _raw_write_lock_irq+0x36/0x50 kernel/locking/spinlock.c:326 fasync_remove_entry+0xb2/0x1e0 fs/fcntl.c:1001 fasync_helper+0xaf/0xd0 fs/fcntl.c:1104 lease_modify+0x232/0x500 fs/locks.c:1455 locks_remove_lease fs/locks.c:2675 [inline] locks_remove_file+0x29e/0x5b0 fs/locks.c:2700 __fput+0x351/0xb70 fs/file_table.c:457 task_work_run+0x150/0x240 kernel/task_work.c:227 resume_user_mode_work include/linux/resume_user_mode.h:50 [inline] exit_to_user_mode_loop kernel/entry/common.c:114 [inline] exit_to_user_mode_prepare include/linux/entry-common.h:329 [inline] __syscall_exit_to_user_mode_work kernel/entry/common.c:207 [inline] syscall_exit_to_user_mode+0x27b/0x2a0 kernel/entry/common.c:218 do_syscall_64+0xda/0x260 arch/x86/entry/syscall_64.c:100 entry_SYSCALL_64_after_hwframe+0x77/0x7f INITIAL READ USE at: lock_acquire kernel/locking/lockdep.c:5866 [inline] lock_acquire+0x179/0x350 kernel/locking/lockdep.c:5823 __raw_read_lock_irqsave include/linux/rwlock_api_smp.h:160 [inline] _raw_read_lock_irqsave+0x74/0x90 kernel/locking/spinlock.c:236 kill_fasync_rcu fs/fcntl.c:1124 [inline] kill_fasync fs/fcntl.c:1148 [inline] kill_fasync+0x138/0x510 fs/fcntl.c:1141 lease_break_callback+0x23/0x30 fs/locks.c:558 __break_lease+0x671/0x1810 fs/locks.c:1592 break_lease include/linux/filelock.h:441 [inline] do_dentry_open+0x6e1/0x1c10 fs/open.c:947 vfs_open+0x82/0x3f0 fs/open.c:1086 dentry_open+0x71/0xd0 fs/open.c:1109 do_mq_open+0x4c1/0x8b0 ipc/mqueue.c:924 __do_sys_mq_open ipc/mqueue.c:951 [inline] __se_sys_mq_open ipc/mqueue.c:944 [inline] __x64_sys_mq_open+0x155/0x1e0 ipc/mqueue.c:944 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0xcd/0x260 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f } ... key at: [] __key.0+0x0/0x40 ... acquired at: __raw_read_lock_irqsave include/linux/rwlock_api_smp.h:160 [inline] _raw_read_lock_irqsave+0x74/0x90 kernel/locking/spinlock.c:236 kill_fasync_rcu fs/fcntl.c:1124 [inline] kill_fasync fs/fcntl.c:1148 [inline] kill_fasync+0x138/0x510 fs/fcntl.c:1141 __pass_event drivers/input/evdev.c:240 [inline] evdev_pass_values+0x619/0x9b0 drivers/input/evdev.c:278 evdev_events+0x1bb/0x390 drivers/input/evdev.c:306 input_pass_values+0x6c4/0x890 drivers/input/input.c:127 input_event_dispose drivers/input/input.c:341 [inline] input_handle_event+0xf00/0x14d0 drivers/input/input.c:369 input_inject_event+0x1cd/0x390 drivers/input/input.c:423 evdev_write+0x457/0x750 drivers/input/evdev.c:528 vfs_write+0x25c/0x1180 fs/read_write.c:682 ksys_write+0x205/0x240 fs/read_write.c:736 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0xcd/0x260 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f -> (&client->buffer_lock){....}-{3:3} { INITIAL USE at: lock_acquire kernel/locking/lockdep.c:5866 [inline] lock_acquire+0x179/0x350 kernel/locking/lockdep.c:5823 __raw_spin_lock include/linux/spinlock_api_smp.h:133 [inline] _raw_spin_lock+0x2e/0x40 kernel/locking/spinlock.c:154 spin_lock include/linux/spinlock.h:351 [inline] evdev_pass_values+0x10e/0x9b0 drivers/input/evdev.c:261 evdev_events+0x1bb/0x390 drivers/input/evdev.c:306 input_pass_values+0x6c4/0x890 drivers/input/input.c:127 input_event_dispose drivers/input/input.c:341 [inline] input_handle_event+0xf00/0x14d0 drivers/input/input.c:369 input_inject_event+0x1cd/0x390 drivers/input/input.c:423 evdev_write+0x457/0x750 drivers/input/evdev.c:528 vfs_write+0x25c/0x1180 fs/read_write.c:682 ksys_write+0x205/0x240 fs/read_write.c:736 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0xcd/0x260 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f } ... key at: [] __key.1+0x0/0x40 ... acquired at: __raw_spin_lock include/linux/spinlock_api_smp.h:133 [inline] _raw_spin_lock+0x2e/0x40 kernel/locking/spinlock.c:154 spin_lock include/linux/spinlock.h:351 [inline] evdev_pass_values+0x10e/0x9b0 drivers/input/evdev.c:261 evdev_events+0x1bb/0x390 drivers/input/evdev.c:306 input_pass_values+0x6c4/0x890 drivers/input/input.c:127 input_event_dispose drivers/input/input.c:341 [inline] input_handle_event+0xf00/0x14d0 drivers/input/input.c:369 input_inject_event+0x1cd/0x390 drivers/input/input.c:423 evdev_write+0x457/0x750 drivers/input/evdev.c:528 vfs_write+0x25c/0x1180 fs/read_write.c:682 ksys_write+0x205/0x240 fs/read_write.c:736 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0xcd/0x260 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f -> (&dev->event_lock#2){..-.}-{3:3} { IN-SOFTIRQ-W at: lock_acquire kernel/locking/lockdep.c:5866 [inline] lock_acquire+0x179/0x350 kernel/locking/lockdep.c:5823 __raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:110 [inline] _raw_spin_lock_irqsave+0x3a/0x60 kernel/locking/spinlock.c:162 class_spinlock_irqsave_constructor include/linux/spinlock.h:585 [inline] input_inject_event+0x9f/0x390 drivers/input/input.c:418 __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+0x217/0x290 drivers/leds/led-core.c:327 led_trigger_event drivers/leds/led-triggers.c:407 [inline] led_trigger_event+0xda/0x270 drivers/leds/led-triggers.c:395 kbd_propagate_led_state drivers/tty/vt/keyboard.c:1080 [inline] kbd_bh+0x21b/0x300 drivers/tty/vt/keyboard.c:1269 tasklet_action_common+0x284/0x400 kernel/softirq.c:829 handle_softirqs+0x216/0x8e0 kernel/softirq.c:579 __do_softirq kernel/softirq.c:613 [inline] invoke_softirq kernel/softirq.c:453 [inline] __irq_exit_rcu+0x109/0x170 kernel/softirq.c:680 irq_exit_rcu+0x9/0x30 kernel/softirq.c:696 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1049 [inline] sysvec_apic_timer_interrupt+0xa4/0xc0 arch/x86/kernel/apic/apic.c:1049 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:702 __tasklet_schedule_common+0x10d/0x190 kernel/softirq.c:780 tasklet_schedule include/linux/interrupt.h:758 [inline] set_leds drivers/tty/vt/keyboard.c:382 [inline] vt_set_leds_compute_shiftstate+0x76/0x80 drivers/tty/vt/keyboard.c:424 redraw_screen+0x542/0x760 drivers/tty/vt/vt.c:975 complete_change_console+0x110/0x600 drivers/tty/vt/vt_ioctl.c:1140 change_console+0x1ac/0x560 drivers/tty/vt/vt_ioctl.c:1265 console_callback+0x1a1/0x4c0 drivers/tty/vt/vt.c:3126 process_one_work+0x9cf/0x1b70 kernel/workqueue.c:3238 process_scheduled_works kernel/workqueue.c:3319 [inline] worker_thread+0x6c8/0xf10 kernel/workqueue.c:3400 kthread+0x3c2/0x780 kernel/kthread.c:464 ret_from_fork+0x45/0x80 arch/x86/kernel/process.c:153 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245 INITIAL USE at: lock_acquire kernel/locking/lockdep.c:5866 [inline] lock_acquire+0x179/0x350 kernel/locking/lockdep.c:5823 __raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:110 [inline] _raw_spin_lock_irqsave+0x3a/0x60 kernel/locking/spinlock.c:162 class_spinlock_irqsave_constructor include/linux/spinlock.h:585 [inline] input_inject_event+0x9f/0x390 drivers/input/input.c:418 __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+0x217/0x290 drivers/leds/led-core.c:327 kbd_led_trigger_activate+0xcb/0x110 drivers/tty/vt/keyboard.c:1036 led_trigger_set+0x59a/0xc50 drivers/leds/led-triggers.c:212 led_match_default_trigger drivers/leds/led-triggers.c:269 [inline] led_match_default_trigger drivers/leds/led-triggers.c:263 [inline] led_trigger_set_default drivers/leds/led-triggers.c:287 [inline] led_trigger_set_default+0x1bd/0x2a0 drivers/leds/led-triggers.c:276 led_classdev_register_ext+0x7b8/0xa10 drivers/leds/led-class.c:566 led_classdev_register include/linux/leds.h:274 [inline] input_leds_connect+0x552/0x8e0 drivers/input/input-leds.c:145 input_attach_handler.isra.0+0x181/0x260 drivers/input/input.c:993 input_register_device+0xa84/0x1130 drivers/input/input.c:2412 atkbd_connect+0x5da/0xa20 drivers/input/keyboard/atkbd.c:1340 serio_connect_driver drivers/input/serio/serio.c:43 [inline] serio_driver_probe+0x74/0xb0 drivers/input/serio/serio.c:747 call_driver_probe drivers/base/dd.c:579 [inline] really_probe+0x23e/0xa90 drivers/base/dd.c:657 __driver_probe_device+0x1de/0x440 drivers/base/dd.c:799 driver_probe_device+0x4c/0x1b0 drivers/base/dd.c:829 __driver_attach+0x283/0x580 drivers/base/dd.c:1215 bus_for_each_dev+0x13b/0x1d0 drivers/base/bus.c:370 serio_attach_driver drivers/input/serio/serio.c:776 [inline] serio_handle_event+0x247/0xa50 drivers/input/serio/serio.c:213 process_one_work+0x9cf/0x1b70 kernel/workqueue.c:3238 process_scheduled_works kernel/workqueue.c:3319 [inline] worker_thread+0x6c8/0xf10 kernel/workqueue.c:3400 kthread+0x3c2/0x780 kernel/kthread.c:464 ret_from_fork+0x45/0x80 arch/x86/kernel/process.c:153 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245 } ... key at: [] __key.7+0x0/0x40 ... acquired at: mark_usage kernel/locking/lockdep.c:4643 [inline] __lock_acquire+0x9b9/0x1ba0 kernel/locking/lockdep.c:5189 lock_acquire kernel/locking/lockdep.c:5866 [inline] lock_acquire+0x179/0x350 kernel/locking/lockdep.c:5823 __raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:110 [inline] _raw_spin_lock_irqsave+0x3a/0x60 kernel/locking/spinlock.c:162 class_spinlock_irqsave_constructor include/linux/spinlock.h:585 [inline] input_inject_event+0x9f/0x390 drivers/input/input.c:418 __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+0x217/0x290 drivers/leds/led-core.c:327 led_trigger_event drivers/leds/led-triggers.c:407 [inline] led_trigger_event+0xda/0x270 drivers/leds/led-triggers.c:395 kbd_propagate_led_state drivers/tty/vt/keyboard.c:1080 [inline] kbd_bh+0x21b/0x300 drivers/tty/vt/keyboard.c:1269 tasklet_action_common+0x284/0x400 kernel/softirq.c:829 handle_softirqs+0x216/0x8e0 kernel/softirq.c:579 __do_softirq kernel/softirq.c:613 [inline] invoke_softirq kernel/softirq.c:453 [inline] __irq_exit_rcu+0x109/0x170 kernel/softirq.c:680 irq_exit_rcu+0x9/0x30 kernel/softirq.c:696 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1049 [inline] sysvec_apic_timer_interrupt+0xa4/0xc0 arch/x86/kernel/apic/apic.c:1049 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:702 __tasklet_schedule_common+0x10d/0x190 kernel/softirq.c:780 tasklet_schedule include/linux/interrupt.h:758 [inline] set_leds drivers/tty/vt/keyboard.c:382 [inline] vt_set_leds_compute_shiftstate+0x76/0x80 drivers/tty/vt/keyboard.c:424 redraw_screen+0x542/0x760 drivers/tty/vt/vt.c:975 complete_change_console+0x110/0x600 drivers/tty/vt/vt_ioctl.c:1140 change_console+0x1ac/0x560 drivers/tty/vt/vt_ioctl.c:1265 console_callback+0x1a1/0x4c0 drivers/tty/vt/vt.c:3126 process_one_work+0x9cf/0x1b70 kernel/workqueue.c:3238 process_scheduled_works kernel/workqueue.c:3319 [inline] worker_thread+0x6c8/0xf10 kernel/workqueue.c:3400 kthread+0x3c2/0x780 kernel/kthread.c:464 ret_from_fork+0x45/0x80 arch/x86/kernel/process.c:153 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245 stack backtrace: CPU: 0 UID: 0 PID: 21675 Comm: kworker/0:2 Not tainted 6.15.0-rc7-syzkaller #0 PREEMPT(full) Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025 Workqueue: events console_callback Call Trace: __dump_stack lib/dump_stack.c:94 [inline] dump_stack_lvl+0x116/0x1f0 lib/dump_stack.c:120 print_irq_inversion_bug.part.0+0x212/0x270 kernel/locking/lockdep.c:4126 print_irq_inversion_bug kernel/locking/lockdep.c:4077 [inline] check_usage_forwards kernel/locking/lockdep.c:4159 [inline] mark_lock_irq kernel/locking/lockdep.c:4295 [inline] mark_lock+0x2e5/0x610 kernel/locking/lockdep.c:4754 mark_usage kernel/locking/lockdep.c:4643 [inline] __lock_acquire+0x9b9/0x1ba0 kernel/locking/lockdep.c:5189 lock_acquire kernel/locking/lockdep.c:5866 [inline] lock_acquire+0x179/0x350 kernel/locking/lockdep.c:5823 __raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:110 [inline] _raw_spin_lock_irqsave+0x3a/0x60 kernel/locking/spinlock.c:162 class_spinlock_irqsave_constructor include/linux/spinlock.h:585 [inline] input_inject_event+0x9f/0x390 drivers/input/input.c:418 __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+0x217/0x290 drivers/leds/led-core.c:327 led_trigger_event drivers/leds/led-triggers.c:407 [inline] led_trigger_event+0xda/0x270 drivers/leds/led-triggers.c:395 kbd_propagate_led_state drivers/tty/vt/keyboard.c:1080 [inline] kbd_bh+0x21b/0x300 drivers/tty/vt/keyboard.c:1269 tasklet_action_common+0x284/0x400 kernel/softirq.c:829 handle_softirqs+0x216/0x8e0 kernel/softirq.c:579 __do_softirq kernel/softirq.c:613 [inline] invoke_softirq kernel/softirq.c:453 [inline] __irq_exit_rcu+0x109/0x170 kernel/softirq.c:680 irq_exit_rcu+0x9/0x30 kernel/softirq.c:696 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1049 [inline] sysvec_apic_timer_interrupt+0xa4/0xc0 arch/x86/kernel/apic/apic.c:1049 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:702 RIP: 0010:__tasklet_schedule_common+0x10d/0x190 kernel/softirq.c:780 Code: f6 c4 02 75 51 5b 5d 41 5c 41 5d 41 5e e9 8b 32 f3 09 e8 e6 25 46 00 e9 23 ff ff ff e8 1c 24 46 00 9c 58 f6 c4 02 75 3b fb 5b <5d> 41 5c 41 5d 41 5e c3 cc cc cc cc 48 c7 c7 60 86 8b 8b e8 3b 56 RSP: 0018:ffffc9000356fa58 EFLAGS: 00000246 RAX: 0000000000000002 RBX: ffff88805b0c3000 RCX: 0000000000000006 RDX: 0000000000000000 RSI: ffffffff8dbe41e5 RDI: ffffffff8bf4a220 RBP: ffffffff8f0b7c00 R08: 0000000000000001 R09: 0000000000000001 R10: ffffffff90852e17 R11: 0000000000000000 R12: 0000000000000200 R13: 0000000000000006 R14: ffff8880b8423a20 R15: 0000000000000001 tasklet_schedule include/linux/interrupt.h:758 [inline] set_leds drivers/tty/vt/keyboard.c:382 [inline] vt_set_leds_compute_shiftstate+0x76/0x80 drivers/tty/vt/keyboard.c:424 redraw_screen+0x542/0x760 drivers/tty/vt/vt.c:975 complete_change_console+0x110/0x600 drivers/tty/vt/vt_ioctl.c:1140 change_console+0x1ac/0x560 drivers/tty/vt/vt_ioctl.c:1265 console_callback+0x1a1/0x4c0 drivers/tty/vt/vt.c:3126 process_one_work+0x9cf/0x1b70 kernel/workqueue.c:3238 process_scheduled_works kernel/workqueue.c:3319 [inline] worker_thread+0x6c8/0xf10 kernel/workqueue.c:3400 kthread+0x3c2/0x780 kernel/kthread.c:464 ret_from_fork+0x45/0x80 arch/x86/kernel/process.c:153 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245 ---------------- Code disassembly (best guess): 0: f6 c4 02 test $0x2,%ah 3: 75 51 jne 0x56 5: 5b pop %rbx 6: 5d pop %rbp 7: 41 5c pop %r12 9: 41 5d pop %r13 b: 41 5e pop %r14 d: e9 8b 32 f3 09 jmp 0x9f3329d 12: e8 e6 25 46 00 call 0x4625fd 17: e9 23 ff ff ff jmp 0xffffff3f 1c: e8 1c 24 46 00 call 0x46243d 21: 9c pushf 22: 58 pop %rax 23: f6 c4 02 test $0x2,%ah 26: 75 3b jne 0x63 28: fb sti 29: 5b pop %rbx * 2a: 5d pop %rbp <-- trapping instruction 2b: 41 5c pop %r12 2d: 41 5d pop %r13 2f: 41 5e pop %r14 31: c3 ret 32: cc int3 33: cc int3 34: cc int3 35: cc int3 36: 48 c7 c7 60 86 8b 8b mov $0xffffffff8b8b8660,%rdi 3d: e8 .byte 0xe8 3e: 3b .byte 0x3b 3f: 56 push %rsi