===================================================== WARNING: HARDIRQ-safe -> HARDIRQ-unsafe lock order detected 6.7.0-rc7-syzkaller #0 Not tainted ----------------------------------------------------- syz-executor631/5174 [HC0[0]:SC0[0]:HE0:SE1] is trying to acquire: ffff888021efce18 (&f->f_owner.lock){....}-{2:2}, at: send_sigio+0x28/0x3c0 fs/fcntl.c:780 and this task is already holding: ffff8880191569f0 (&new->fa_lock){....}-{2:2}, at: kill_fasync_rcu fs/fcntl.c:998 [inline] (&new->fa_lock){....}-{2:2}, at: kill_fasync fs/fcntl.c:1019 [inline] (&new->fa_lock){....}-{2:2}, at: kill_fasync+0x138/0x4f0 fs/fcntl.c:1012 which would create a new lock dependency: (&new->fa_lock){....}-{2:2} -> (&f->f_owner.lock){....}-{2:2} but this new dependency connects a HARDIRQ-irq-safe lock: (&dev->event_lock#2){-...}-{2:2} ... which became HARDIRQ-irq-safe at: lock_acquire kernel/locking/lockdep.c:5754 [inline] lock_acquire+0x1ae/0x520 kernel/locking/lockdep.c:5719 __raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:110 [inline] _raw_spin_lock_irqsave+0x3a/0x50 kernel/locking/spinlock.c:162 input_event drivers/input/input.c:434 [inline] input_event+0x70/0xa0 drivers/input/input.c:427 input_report_key include/linux/input.h:425 [inline] psmouse_report_standard_buttons+0x30/0x80 drivers/input/mouse/psmouse-base.c:128 psmouse_report_standard_packet drivers/input/mouse/psmouse-base.c:146 [inline] psmouse_process_byte+0x39c/0x8a0 drivers/input/mouse/psmouse-base.c:237 psmouse_handle_byte+0x41/0x560 drivers/input/mouse/psmouse-base.c:279 psmouse_receive_byte+0x243/0xe10 drivers/input/mouse/psmouse-base.c:426 ps2_interrupt+0x1fe/0x5a0 drivers/input/serio/libps2.c:613 serio_interrupt+0x8d/0x150 drivers/input/serio/serio.c:998 i8042_interrupt+0x3f2/0x8a0 drivers/input/serio/i8042.c:606 __handle_irq_event_percpu+0x22a/0x750 kernel/irq/handle.c:158 handle_irq_event_percpu kernel/irq/handle.c:193 [inline] handle_irq_event+0xab/0x1e0 kernel/irq/handle.c:210 handle_edge_irq+0x261/0xcf0 kernel/irq/chip.c:831 generic_handle_irq_desc include/linux/irqdesc.h:161 [inline] handle_irq arch/x86/kernel/irq.c:238 [inline] __common_interrupt+0xdb/0x240 arch/x86/kernel/irq.c:257 common_interrupt+0xab/0xd0 arch/x86/kernel/irq.c:247 asm_common_interrupt+0x26/0x40 arch/x86/include/asm/idtentry.h:640 native_safe_halt arch/x86/include/asm/irqflags.h:48 [inline] arch_safe_halt arch/x86/include/asm/irqflags.h:86 [inline] default_idle+0xf/0x20 arch/x86/kernel/process.c:742 default_idle_call+0x69/0xa0 kernel/sched/idle.c:97 cpuidle_idle_call kernel/sched/idle.c:170 [inline] do_idle+0x332/0x400 kernel/sched/idle.c:282 cpu_startup_entry+0x50/0x60 kernel/sched/idle.c:380 start_secondary+0x20e/0x2a0 arch/x86/kernel/smpboot.c:336 secondary_startup_64_no_verify+0x178/0x17b to a HARDIRQ-irq-unsafe lock: (tasklist_lock){.+.+}-{2:2} ... which became HARDIRQ-irq-unsafe at: ... lock_acquire kernel/locking/lockdep.c:5754 [inline] lock_acquire+0x1ae/0x520 kernel/locking/lockdep.c:5719 __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:1582 do_wait+0x212/0x530 kernel/exit.c:1626 kernel_wait+0xa0/0x150 kernel/exit.c:1802 call_usermodehelper_exec_sync kernel/umh.c:137 [inline] call_usermodehelper_exec_work+0xf1/0x170 kernel/umh.c:164 process_one_work+0x886/0x15d0 kernel/workqueue.c:2627 process_scheduled_works kernel/workqueue.c:2700 [inline] worker_thread+0x8b9/0x1290 kernel/workqueue.c:2781 kthread+0x2c6/0x3a0 kernel/kthread.c:388 ret_from_fork+0x45/0x80 arch/x86/kernel/process.c:147 ret_from_fork_asm+0x11/0x20 arch/x86/entry/entry_64.S:242 other info that might help us debug this: Chain exists of: &dev->event_lock#2 --> &new->fa_lock --> tasklist_lock Possible interrupt unsafe locking scenario: CPU0 CPU1 ---- ---- lock(tasklist_lock); local_irq_disable(); lock(&dev->event_lock#2); lock(&new->fa_lock); lock(&dev->event_lock#2); *** DEADLOCK *** 8 locks held by syz-executor631/5174: #0: ffff888022987110 (&evdev->mutex){+.+.}-{3:3}, at: evdev_write+0x201/0x750 drivers/input/evdev.c:513 #1: ffff88801a7f2230 (&dev->event_lock#2){-...}-{2:2}, at: input_inject_event+0xa4/0x370 drivers/input/input.c:460 #2: ffffffff8cfa7d60 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire include/linux/rcupdate.h:301 [inline] #2: ffffffff8cfa7d60 (rcu_read_lock){....}-{1:2}, at: rcu_read_lock include/linux/rcupdate.h:747 [inline] #2: ffffffff8cfa7d60 (rcu_read_lock){....}-{1:2}, at: input_inject_event+0xca/0x370 drivers/input/input.c:462 #3: ffffffff8cfa7d60 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire include/linux/rcupdate.h:301 [inline] #3: ffffffff8cfa7d60 (rcu_read_lock){....}-{1:2}, at: rcu_read_lock include/linux/rcupdate.h:747 [inline] #3: ffffffff8cfa7d60 (rcu_read_lock){....}-{1:2}, at: input_pass_values+0xb2/0x840 drivers/input/input.c:153 #4: ffffffff8cfa7d60 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire include/linux/rcupdate.h:301 [inline] #4: ffffffff8cfa7d60 (rcu_read_lock){....}-{1:2}, at: rcu_read_lock include/linux/rcupdate.h:747 [inline] #4: ffffffff8cfa7d60 (rcu_read_lock){....}-{1:2}, at: evdev_events+0x87/0x390 drivers/input/evdev.c:298 #5: ffff888016685028 (&client->buffer_lock){....}-{2:2}, at: spin_lock include/linux/spinlock.h:351 [inline] #5: ffff888016685028 (&client->buffer_lock){....}-{2:2}, at: evdev_pass_values+0x10e/0x9b0 drivers/input/evdev.c:261 #6: ffffffff8cfa7d60 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire include/linux/rcupdate.h:301 [inline] #6: ffffffff8cfa7d60 (rcu_read_lock){....}-{1:2}, at: rcu_read_lock include/linux/rcupdate.h:747 [inline] #6: ffffffff8cfa7d60 (rcu_read_lock){....}-{1:2}, at: kill_fasync fs/fcntl.c:1018 [inline] #6: ffffffff8cfa7d60 (rcu_read_lock){....}-{1:2}, at: kill_fasync+0x6d/0x4f0 fs/fcntl.c:1012 #7: ffff8880191569f0 (&new->fa_lock){....}-{2:2}, at: kill_fasync_rcu fs/fcntl.c:998 [inline] #7: ffff8880191569f0 (&new->fa_lock){....}-{2:2}, at: kill_fasync fs/fcntl.c:1019 [inline] #7: ffff8880191569f0 (&new->fa_lock){....}-{2:2}, at: kill_fasync+0x138/0x4f0 fs/fcntl.c:1012 the dependencies between HARDIRQ-irq-safe lock and the holding lock: -> (&dev->event_lock#2){-...}-{2:2} { IN-HARDIRQ-W at: lock_acquire kernel/locking/lockdep.c:5754 [inline] lock_acquire+0x1ae/0x520 kernel/locking/lockdep.c:5719 __raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:110 [inline] _raw_spin_lock_irqsave+0x3a/0x50 kernel/locking/spinlock.c:162 input_event drivers/input/input.c:434 [inline] input_event+0x70/0xa0 drivers/input/input.c:427 input_report_key include/linux/input.h:425 [inline] psmouse_report_standard_buttons+0x30/0x80 drivers/input/mouse/psmouse-base.c:128 psmouse_report_standard_packet drivers/input/mouse/psmouse-base.c:146 [inline] psmouse_process_byte+0x39c/0x8a0 drivers/input/mouse/psmouse-base.c:237 psmouse_handle_byte+0x41/0x560 drivers/input/mouse/psmouse-base.c:279 psmouse_receive_byte+0x243/0xe10 drivers/input/mouse/psmouse-base.c:426 ps2_interrupt+0x1fe/0x5a0 drivers/input/serio/libps2.c:613 serio_interrupt+0x8d/0x150 drivers/input/serio/serio.c:998 i8042_interrupt+0x3f2/0x8a0 drivers/input/serio/i8042.c:606 __handle_irq_event_percpu+0x22a/0x750 kernel/irq/handle.c:158 handle_irq_event_percpu kernel/irq/handle.c:193 [inline] handle_irq_event+0xab/0x1e0 kernel/irq/handle.c:210 handle_edge_irq+0x261/0xcf0 kernel/irq/chip.c:831 generic_handle_irq_desc include/linux/irqdesc.h:161 [inline] handle_irq arch/x86/kernel/irq.c:238 [inline] __common_interrupt+0xdb/0x240 arch/x86/kernel/irq.c:257 common_interrupt+0xab/0xd0 arch/x86/kernel/irq.c:247 asm_common_interrupt+0x26/0x40 arch/x86/include/asm/idtentry.h:640 native_safe_halt arch/x86/include/asm/irqflags.h:48 [inline] arch_safe_halt arch/x86/include/asm/irqflags.h:86 [inline] default_idle+0xf/0x20 arch/x86/kernel/process.c:742 default_idle_call+0x69/0xa0 kernel/sched/idle.c:97 cpuidle_idle_call kernel/sched/idle.c:170 [inline] do_idle+0x332/0x400 kernel/sched/idle.c:282 cpu_startup_entry+0x50/0x60 kernel/sched/idle.c:380 start_secondary+0x20e/0x2a0 arch/x86/kernel/smpboot.c:336 secondary_startup_64_no_verify+0x178/0x17b INITIAL USE at: lock_acquire kernel/locking/lockdep.c:5754 [inline] lock_acquire+0x1ae/0x520 kernel/locking/lockdep.c:5719 __raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:110 [inline] _raw_spin_lock_irqsave+0x3a/0x50 kernel/locking/spinlock.c:162 input_inject_event+0xa4/0x370 drivers/input/input.c:460 __led_set_brightness drivers/leds/led-core.c:52 [inline] led_set_brightness_nopm drivers/leds/led-core.c:316 [inline] led_set_brightness_nosleep drivers/leds/led-core.c:347 [inline] led_set_brightness+0x211/0x290 drivers/leds/led-core.c:309 led_trigger_event drivers/leds/led-triggers.c:391 [inline] led_trigger_event+0xb2/0x240 drivers/leds/led-triggers.c:381 kbd_led_trigger_activate+0xc6/0x100 drivers/tty/vt/keyboard.c:1036 led_trigger_set+0x589/0xc00 drivers/leds/led-triggers.c:198 led_trigger_set_default drivers/leds/led-triggers.c:263 [inline] led_trigger_set_default+0x1d2/0x230 drivers/leds/led-triggers.c:250 led_classdev_register_ext+0x78d/0xa10 drivers/leds/led-class.c:555 led_classdev_register include/linux/leds.h:279 [inline] input_leds_connect+0x54a/0x8d0 drivers/input/input-leds.c:139 input_attach_handler.isra.0+0x17c/0x250 drivers/input/input.c:1064 input_register_device+0xb1e/0x1130 drivers/input/input.c:2396 atkbd_connect+0x5e2/0xa20 drivers/input/keyboard/atkbd.c:1336 serio_connect_driver drivers/input/serio/serio.c:44 [inline] serio_driver_probe+0x71/0xa0 drivers/input/serio/serio.c:775 call_driver_probe drivers/base/dd.c:579 [inline] really_probe+0x234/0xc90 drivers/base/dd.c:658 __driver_probe_device+0x1de/0x4b0 drivers/base/dd.c:800 driver_probe_device+0x4c/0x1a0 drivers/base/dd.c:830 __driver_attach+0x274/0x570 drivers/base/dd.c:1216 bus_for_each_dev+0x13c/0x1d0 drivers/base/bus.c:368 serio_attach_driver drivers/input/serio/serio.c:804 [inline] serio_handle_event+0x2b8/0xa90 drivers/input/serio/serio.c:224 process_one_work+0x886/0x15d0 kernel/workqueue.c:2627 process_scheduled_works kernel/workqueue.c:2700 [inline] worker_thread+0x8b9/0x1290 kernel/workqueue.c:2781 kthread+0x2c6/0x3a0 kernel/kthread.c:388 ret_from_fork+0x45/0x80 arch/x86/kernel/process.c:147 ret_from_fork_asm+0x11/0x20 arch/x86/entry/entry_64.S:242 } ... key at: [] __key.6+0x0/0x40 -> (&client->buffer_lock){....}-{2:2} { INITIAL USE at: lock_acquire kernel/locking/lockdep.c:5754 [inline] lock_acquire+0x1ae/0x520 kernel/locking/lockdep.c:5719 __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+0x1b7/0x390 drivers/input/evdev.c:306 input_to_handler+0x29e/0x4c0 drivers/input/input.c:129 input_pass_values+0x5c9/0x840 drivers/input/input.c:161 input_event_dispose+0x377/0x630 drivers/input/input.c:378 input_handle_event+0x11c/0xd80 drivers/input/input.c:406 input_inject_event+0x1bb/0x370 drivers/input/input.c:465 evdev_write+0x456/0x750 drivers/input/evdev.c:530 vfs_write+0x2a4/0xdf0 fs/read_write.c:582 ksys_write+0x1f0/0x250 fs/read_write.c:637 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0x40/0x110 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x63/0x6b } ... key at: [] __key.3+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+0x1b7/0x390 drivers/input/evdev.c:306 input_to_handler+0x29e/0x4c0 drivers/input/input.c:129 input_pass_values+0x5c9/0x840 drivers/input/input.c:161 input_event_dispose+0x377/0x630 drivers/input/input.c:378 input_handle_event+0x11c/0xd80 drivers/input/input.c:406 input_inject_event+0x1bb/0x370 drivers/input/input.c:465 evdev_write+0x456/0x750 drivers/input/evdev.c:530 vfs_write+0x2a4/0xdf0 fs/read_write.c:582 ksys_write+0x1f0/0x250 fs/read_write.c:637 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0x40/0x110 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x63/0x6b -> (&new->fa_lock){....}-{2:2} { INITIAL READ USE at: lock_acquire kernel/locking/lockdep.c:5754 [inline] lock_acquire+0x1ae/0x520 kernel/locking/lockdep.c:5719 __raw_read_lock_irqsave include/linux/rwlock_api_smp.h:160 [inline] _raw_read_lock_irqsave+0x70/0x90 kernel/locking/spinlock.c:236 kill_fasync_rcu fs/fcntl.c:998 [inline] kill_fasync fs/fcntl.c:1019 [inline] kill_fasync+0x138/0x4f0 fs/fcntl.c:1012 __pass_event drivers/input/evdev.c:240 [inline] evdev_pass_values+0x619/0x9b0 drivers/input/evdev.c:278 evdev_events+0x1b7/0x390 drivers/input/evdev.c:306 input_to_handler+0x29e/0x4c0 drivers/input/input.c:129 input_pass_values+0x5c9/0x840 drivers/input/input.c:161 input_event_dispose+0x377/0x630 drivers/input/input.c:378 input_handle_event+0x11c/0xd80 drivers/input/input.c:406 input_inject_event+0x1bb/0x370 drivers/input/input.c:465 evdev_write+0x456/0x750 drivers/input/evdev.c:530 vfs_write+0x2a4/0xdf0 fs/read_write.c:582 ksys_write+0x1f0/0x250 fs/read_write.c:637 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0x40/0x110 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x63/0x6b } ... key at: [] __key.0+0x0/0x40 ... acquired at: __raw_read_lock_irqsave include/linux/rwlock_api_smp.h:160 [inline] _raw_read_lock_irqsave+0x70/0x90 kernel/locking/spinlock.c:236 kill_fasync_rcu fs/fcntl.c:998 [inline] kill_fasync fs/fcntl.c:1019 [inline] kill_fasync+0x138/0x4f0 fs/fcntl.c:1012 __pass_event drivers/input/evdev.c:240 [inline] evdev_pass_values+0x619/0x9b0 drivers/input/evdev.c:278 evdev_events+0x1b7/0x390 drivers/input/evdev.c:306 input_to_handler+0x29e/0x4c0 drivers/input/input.c:129 input_pass_values+0x5c9/0x840 drivers/input/input.c:161 input_event_dispose+0x377/0x630 drivers/input/input.c:378 input_handle_event+0x11c/0xd80 drivers/input/input.c:406 input_inject_event+0x1bb/0x370 drivers/input/input.c:465 evdev_write+0x456/0x750 drivers/input/evdev.c:530 vfs_write+0x2a4/0xdf0 fs/read_write.c:582 ksys_write+0x1f0/0x250 fs/read_write.c:637 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0x40/0x110 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x63/0x6b the dependencies between the lock to be acquired and HARDIRQ-irq-unsafe lock: -> (tasklist_lock){.+.+}-{2:2} { HARDIRQ-ON-R at: lock_acquire kernel/locking/lockdep.c:5754 [inline] lock_acquire+0x1ae/0x520 kernel/locking/lockdep.c:5719 __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:1582 do_wait+0x212/0x530 kernel/exit.c:1626 kernel_wait+0xa0/0x150 kernel/exit.c:1802 call_usermodehelper_exec_sync kernel/umh.c:137 [inline] call_usermodehelper_exec_work+0xf1/0x170 kernel/umh.c:164 process_one_work+0x886/0x15d0 kernel/workqueue.c:2627 process_scheduled_works kernel/workqueue.c:2700 [inline] worker_thread+0x8b9/0x1290 kernel/workqueue.c:2781 kthread+0x2c6/0x3a0 kernel/kthread.c:388 ret_from_fork+0x45/0x80 arch/x86/kernel/process.c:147 ret_from_fork_asm+0x11/0x20 arch/x86/entry/entry_64.S:242 SOFTIRQ-ON-R at: lock_acquire kernel/locking/lockdep.c:5754 [inline] lock_acquire+0x1ae/0x520 kernel/locking/lockdep.c:5719 __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:1582 do_wait+0x212/0x530 kernel/exit.c:1626 kernel_wait+0xa0/0x150 kernel/exit.c:1802 call_usermodehelper_exec_sync kernel/umh.c:137 [inline] call_usermodehelper_exec_work+0xf1/0x170 kernel/umh.c:164 process_one_work+0x886/0x15d0 kernel/workqueue.c:2627 process_scheduled_works kernel/workqueue.c:2700 [inline] worker_thread+0x8b9/0x1290 kernel/workqueue.c:2781 kthread+0x2c6/0x3a0 kernel/kthread.c:388 ret_from_fork+0x45/0x80 arch/x86/kernel/process.c:147 ret_from_fork_asm+0x11/0x20 arch/x86/entry/entry_64.S:242 INITIAL USE at: lock_acquire kernel/locking/lockdep.c:5754 [inline] lock_acquire+0x1ae/0x520 kernel/locking/lockdep.c:5719 __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+0x4cfa/0x73f0 kernel/fork.c:2626 kernel_clone+0xfd/0x930 kernel/fork.c:2907 user_mode_thread+0xb4/0xf0 kernel/fork.c:2985 rest_init+0x27/0x2b0 init/main.c:695 arch_call_rest_init+0x13/0x30 init/main.c:827 start_kernel+0x39f/0x480 init/main.c:1072 x86_64_start_reservations+0x18/0x30 arch/x86/kernel/head64.c:555 x86_64_start_kernel+0xb2/0xc0 arch/x86/kernel/head64.c:536 secondary_startup_64_no_verify+0x178/0x17b INITIAL READ USE at: lock_acquire kernel/locking/lockdep.c:5754 [inline] lock_acquire+0x1ae/0x520 kernel/locking/lockdep.c:5719 __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:1582 do_wait+0x212/0x530 kernel/exit.c:1626 kernel_wait+0xa0/0x150 kernel/exit.c:1802 call_usermodehelper_exec_sync kernel/umh.c:137 [inline] call_usermodehelper_exec_work+0xf1/0x170 kernel/umh.c:164 process_one_work+0x886/0x15d0 kernel/workqueue.c:2627 process_scheduled_works kernel/workqueue.c:2700 [inline] worker_thread+0x8b9/0x1290 kernel/workqueue.c:2781 kthread+0x2c6/0x3a0 kernel/kthread.c:388 ret_from_fork+0x45/0x80 arch/x86/kernel/process.c:147 ret_from_fork_asm+0x11/0x20 arch/x86/entry/entry_64.S:242 } ... 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+0xb4/0x3c0 fs/fcntl.c:794 dnotify_handle_event+0x14b/0x280 fs/notify/dnotify/dnotify.c:115 fsnotify_handle_inode_event.isra.0+0x1d0/0x360 fs/notify/fsnotify.c:264 fsnotify_handle_event fs/notify/fsnotify.c:316 [inline] send_to_group fs/notify/fsnotify.c:364 [inline] fsnotify+0x12ee/0x1af0 fs/notify/fsnotify.c:570 fsnotify_name include/linux/fsnotify.h:36 [inline] fsnotify_name include/linux/fsnotify.h:29 [inline] fsnotify_dirent include/linux/fsnotify.h:42 [inline] fsnotify_create include/linux/fsnotify.h:208 [inline] vfs_symlink fs/namei.c:4466 [inline] vfs_symlink+0x50e/0x620 fs/namei.c:4448 do_symlinkat+0x25f/0x310 fs/namei.c:4490 __do_sys_symlinkat fs/namei.c:4506 [inline] __se_sys_symlinkat fs/namei.c:4503 [inline] __x64_sys_symlinkat+0x97/0xc0 fs/namei.c:4503 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0x40/0x110 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x63/0x6b -> (&f->f_owner.lock){....}-{2:2} { INITIAL USE at: lock_acquire kernel/locking/lockdep.c:5754 [inline] lock_acquire+0x1ae/0x520 kernel/locking/lockdep.c:5719 __raw_write_lock_irq include/linux/rwlock_api_smp.h:195 [inline] _raw_write_lock_irq+0x36/0x50 kernel/locking/spinlock.c:326 f_modown+0x2a/0x380 fs/fcntl.c:92 fcntl_dirnotify+0x91f/0xeb0 fs/notify/dnotify/dnotify.c:369 do_fcntl+0xbd9/0x1270 fs/fcntl.c:408 __do_sys_fcntl fs/fcntl.c:456 [inline] __se_sys_fcntl fs/fcntl.c:441 [inline] __x64_sys_fcntl+0x16c/0x1e0 fs/fcntl.c:441 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0x40/0x110 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x63/0x6b INITIAL READ USE at: lock_acquire kernel/locking/lockdep.c:5754 [inline] lock_acquire+0x1ae/0x520 kernel/locking/lockdep.c:5719 __raw_read_lock_irqsave include/linux/rwlock_api_smp.h:160 [inline] _raw_read_lock_irqsave+0x70/0x90 kernel/locking/spinlock.c:236 send_sigio+0x28/0x3c0 fs/fcntl.c:780 dnotify_handle_event+0x14b/0x280 fs/notify/dnotify/dnotify.c:115 fsnotify_handle_inode_event.isra.0+0x1d0/0x360 fs/notify/fsnotify.c:264 fsnotify_handle_event fs/notify/fsnotify.c:316 [inline] send_to_group fs/notify/fsnotify.c:364 [inline] fsnotify+0x12ee/0x1af0 fs/notify/fsnotify.c:570 fsnotify_name include/linux/fsnotify.h:36 [inline] fsnotify_name include/linux/fsnotify.h:29 [inline] fsnotify_dirent include/linux/fsnotify.h:42 [inline] fsnotify_create include/linux/fsnotify.h:208 [inline] vfs_symlink fs/namei.c:4466 [inline] vfs_symlink+0x50e/0x620 fs/namei.c:4448 do_symlinkat+0x25f/0x310 fs/namei.c:4490 __do_sys_symlinkat fs/namei.c:4506 [inline] __se_sys_symlinkat fs/namei.c:4503 [inline] __x64_sys_symlinkat+0x97/0xc0 fs/namei.c:4503 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0x40/0x110 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x63/0x6b } ... key at: [] __key.5+0x0/0x40 ... acquired at: lock_acquire kernel/locking/lockdep.c:5754 [inline] lock_acquire+0x1ae/0x520 kernel/locking/lockdep.c:5719 __raw_read_lock_irqsave include/linux/rwlock_api_smp.h:160 [inline] _raw_read_lock_irqsave+0x70/0x90 kernel/locking/spinlock.c:236 send_sigio+0x28/0x3c0 fs/fcntl.c:780 kill_fasync_rcu fs/fcntl.c:1005 [inline] kill_fasync fs/fcntl.c:1019 [inline] kill_fasync+0x1f6/0x4f0 fs/fcntl.c:1012 __pass_event drivers/input/evdev.c:240 [inline] evdev_pass_values+0x619/0x9b0 drivers/input/evdev.c:278 evdev_events+0x1b7/0x390 drivers/input/evdev.c:306 input_to_handler+0x29e/0x4c0 drivers/input/input.c:129 input_pass_values+0x5c9/0x840 drivers/input/input.c:161 input_event_dispose+0x377/0x630 drivers/input/input.c:378 input_handle_event+0x11c/0xd80 drivers/input/input.c:406 input_inject_event+0x1bb/0x370 drivers/input/input.c:465 evdev_write+0x456/0x750 drivers/input/evdev.c:530 vfs_write+0x2a4/0xdf0 fs/read_write.c:582 ksys_write+0x1f0/0x250 fs/read_write.c:637 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0x40/0x110 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x63/0x6b stack backtrace: CPU: 1 PID: 5174 Comm: syz-executor631 Not tainted 6.7.0-rc7-syzkaller #0 Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.2-debian-1.16.2-1 04/01/2014 Call Trace: __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0xd9/0x1b0 lib/dump_stack.c:106 print_bad_irq_dependency kernel/locking/lockdep.c:2626 [inline] check_irq_usage+0xe18/0x1470 kernel/locking/lockdep.c:2865 check_prev_add kernel/locking/lockdep.c:3138 [inline] check_prevs_add kernel/locking/lockdep.c:3253 [inline] validate_chain kernel/locking/lockdep.c:3869 [inline] __lock_acquire+0x2449/0x3b20 kernel/locking/lockdep.c:5137 lock_acquire kernel/locking/lockdep.c:5754 [inline] lock_acquire+0x1ae/0x520 kernel/locking/lockdep.c:5719 __raw_read_lock_irqsave include/linux/rwlock_api_smp.h:160 [inline] _raw_read_lock_irqsave+0x70/0x90 kernel/locking/spinlock.c:236 send_sigio+0x28/0x3c0 fs/fcntl.c:780 kill_fasync_rcu fs/fcntl.c:1005 [inline] kill_fasync fs/fcntl.c:1019 [inline] kill_fasync+0x1f6/0x4f0 fs/fcntl.c:1012 __pass_event drivers/input/evdev.c:240 [inline] evdev_pass_values+0x619/0x9b0 drivers/input/evdev.c:278 evdev_events+0x1b7/0x390 drivers/input/evdev.c:306 input_to_handler+0x29e/0x4c0 drivers/input/input.c:129 input_pass_values+0x5c9/0x840 drivers/input/input.c:161 input_event_dispose+0x377/0x630 drivers/input/input.c:378 input_handle_event+0x11c/0xd80 drivers/input/input.c:406 input_inject_event+0x1bb/0x370 drivers/input/input.c:465 evdev_write+0x456/0x750 drivers/input/evdev.c:530 vfs_write+0x2a4/0xdf0 fs/read_write.c:582 ksys_write+0x1f0/0x250 fs/read_write.c:637 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0x40/0x110 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x63/0x6b RIP: 0033:0x7f8e886402e9 Code: 48 83 c4 28 c3 e8 37 17 00 00 0f 1f 80 00 00 00 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 b8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007ffc98f9b338 EFLAGS: 00000246 ORIG_RAX: 0000000000000001 RAX: ffffffffffffffda RBX: 00007ffc98f9b508 RCX: 00007f8e886402e9 RDX: 0000000000000373 RSI: 0000000020000040 RDI: 0000000000000005 RBP: 00007f8e886b3610 R08: 00007ffc98f9b508 R09: 00007ffc98f9b508 R10: 00007ffc98f9b508 R11: 0000000000000246 R12: 0000000000000001 R13: 00007ffc98f9b4f8 R14: 0000000000000001 R15: 0000000000000001