===================================================== WARNING: SOFTIRQ-safe -> SOFTIRQ-unsafe lock order detected 6.9.0-syzkaller-10323-g8f6a15f095a6 #0 Not tainted ----------------------------------------------------- syz-executor.1/12491 [HC0[0]:SC0[0]:HE0:SE1] is trying to acquire: ffff88802881b168 (&new->fa_lock){....}-{2:2}, at: kill_fasync_rcu fs/fcntl.c:1028 [inline] ffff88802881b168 (&new->fa_lock){....}-{2:2}, at: kill_fasync+0x19e/0x4d0 fs/fcntl.c:1049 and this task is already holding: ffff88807455e028 (&client->buffer_lock){..-.}-{2:2}, at: spin_lock include/linux/spinlock.h:351 [inline] ffff88807455e028 (&client->buffer_lock){..-.}-{2:2}, at: evdev_pass_values+0xf2/0xad0 drivers/input/evdev.c:261 which would create a new lock dependency: (&client->buffer_lock){..-.}-{2:2} -> (&new->fa_lock){....}-{2:2} but this new dependency connects a SOFTIRQ-irq-safe lock: (&client->buffer_lock){..-.}-{2:2} ... which became SOFTIRQ-irq-safe at: lock_acquire+0x1ed/0x550 kernel/locking/lockdep.c:5754 __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+0xf2/0xad0 drivers/input/evdev.c:261 evdev_events+0x1c2/0x300 drivers/input/evdev.c:306 input_to_handler drivers/input/input.c:129 [inline] input_pass_values+0x84d/0x1200 drivers/input/input.c:161 input_event_dispose+0x402/0x650 drivers/input/input.c:389 input_handle_event+0xa71/0xbe0 drivers/input/input.c:406 input_event+0xa4/0xd0 drivers/input/input.c:435 hidinput_hid_event+0x138c/0x1ca0 drivers/hid/hid-input.c:1733 hid_process_event+0x439/0x590 drivers/hid/hid-core.c:1541 hid_process_report drivers/hid/hid-core.c:1689 [inline] hid_report_raw_event+0x1002/0x18a0 drivers/hid/hid-core.c:2016 hid_input_report+0x416/0x500 drivers/hid/hid-core.c:2090 hid_irq_in+0x4a0/0x6d0 drivers/hid/usbhid/hid-core.c:284 __usb_hcd_giveback_urb+0x373/0x530 drivers/usb/core/hcd.c:1648 dummy_timer+0x833/0x45f0 drivers/usb/gadget/udc/dummy_hcd.c:1987 call_timer_fn+0x18e/0x650 kernel/time/timer.c:1792 expire_timers kernel/time/timer.c:1843 [inline] __run_timers kernel/time/timer.c:2417 [inline] __run_timer_base+0x66a/0x8e0 kernel/time/timer.c:2428 run_timer_base kernel/time/timer.c:2437 [inline] run_timer_softirq+0xb7/0x170 kernel/time/timer.c:2447 handle_softirqs+0x2d6/0x990 kernel/softirq.c:554 __do_softirq kernel/softirq.c:588 [inline] invoke_softirq kernel/softirq.c:428 [inline] __irq_exit_rcu+0xf4/0x1c0 kernel/softirq.c:637 irq_exit_rcu+0x9/0x30 kernel/softirq.c:649 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1043 [inline] sysvec_apic_timer_interrupt+0xa6/0xc0 arch/x86/kernel/apic/apic.c:1043 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:702 native_safe_halt arch/x86/include/asm/irqflags.h:48 [inline] arch_safe_halt arch/x86/include/asm/irqflags.h:86 [inline] acpi_safe_halt+0x21/0x30 drivers/acpi/processor_idle.c:112 acpi_idle_enter+0xe4/0x140 drivers/acpi/processor_idle.c:707 cpuidle_enter_state+0x112/0x480 drivers/cpuidle/cpuidle.c:267 cpuidle_enter+0x5d/0xa0 drivers/cpuidle/cpuidle.c:388 call_cpuidle kernel/sched/idle.c:155 [inline] cpuidle_idle_call kernel/sched/idle.c:236 [inline] do_idle+0x375/0x5d0 kernel/sched/idle.c:332 cpu_startup_entry+0x42/0x60 kernel/sched/idle.c:430 __pfx_ap_starting+0x0/0x10 arch/x86/kernel/smpboot.c:313 common_startup_64+0x13e/0x147 to a SOFTIRQ-irq-unsafe lock: (tasklist_lock){.+.+}-{2:2} ... which became SOFTIRQ-irq-unsafe at: ... lock_acquire+0x1ed/0x550 kernel/locking/lockdep.c:5754 __raw_read_lock include/linux/rwlock_api_smp.h:150 [inline] _raw_read_lock+0x36/0x50 kernel/locking/spinlock.c:228 __do_wait+0x12d/0x850 kernel/exit.c:1586 do_wait+0x1e9/0x560 kernel/exit.c:1630 kernel_wait+0xe9/0x240 kernel/exit.c:1806 call_usermodehelper_exec_sync kernel/umh.c:137 [inline] call_usermodehelper_exec_work+0xbd/0x230 kernel/umh.c:164 process_one_work kernel/workqueue.c:3231 [inline] process_scheduled_works+0xa2c/0x1830 kernel/workqueue.c:3312 worker_thread+0x86d/0xd70 kernel/workqueue.c:3393 kthread+0x2f0/0x390 kernel/kthread.c:389 ret_from_fork+0x4b/0x80 arch/x86/kernel/process.c:147 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244 other info that might help us debug this: Chain exists of: &client->buffer_lock --> &new->fa_lock --> tasklist_lock Possible interrupt unsafe locking scenario: CPU0 CPU1 ---- ---- lock(tasklist_lock); local_irq_disable(); lock(&client->buffer_lock); lock(&new->fa_lock); lock(&client->buffer_lock); *** DEADLOCK *** 7 locks held by syz-executor.1/12491: #0: ffff888024b16110 (&evdev->mutex){+.+.}-{3:3}, at: evdev_write+0x272/0x7c0 drivers/input/evdev.c:513 #1: ffff888019f41230 (&dev->event_lock#2){-.-.}-{2:2}, at: input_inject_event+0xc5/0x340 drivers/input/input.c:460 #2: ffffffff8e333d20 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire include/linux/rcupdate.h:329 [inline] #2: ffffffff8e333d20 (rcu_read_lock){....}-{1:2}, at: rcu_read_lock include/linux/rcupdate.h:781 [inline] #2: ffffffff8e333d20 (rcu_read_lock){....}-{1:2}, at: input_inject_event+0xd6/0x340 drivers/input/input.c:462 #3: ffffffff8e333d20 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire include/linux/rcupdate.h:329 [inline] #3: ffffffff8e333d20 (rcu_read_lock){....}-{1:2}, at: rcu_read_lock include/linux/rcupdate.h:781 [inline] #3: ffffffff8e333d20 (rcu_read_lock){....}-{1:2}, at: input_pass_values+0x9d/0x1200 drivers/input/input.c:153 #4: ffffffff8e333d20 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire include/linux/rcupdate.h:329 [inline] #4: ffffffff8e333d20 (rcu_read_lock){....}-{1:2}, at: rcu_read_lock include/linux/rcupdate.h:781 [inline] #4: ffffffff8e333d20 (rcu_read_lock){....}-{1:2}, at: evdev_events+0x6f/0x300 drivers/input/evdev.c:298 #5: ffff88807455e028 (&client->buffer_lock){..-.}-{2:2}, at: spin_lock include/linux/spinlock.h:351 [inline] #5: ffff88807455e028 (&client->buffer_lock){..-.}-{2:2}, at: evdev_pass_values+0xf2/0xad0 drivers/input/evdev.c:261 #6: ffffffff8e333d20 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire include/linux/rcupdate.h:329 [inline] #6: ffffffff8e333d20 (rcu_read_lock){....}-{1:2}, at: rcu_read_lock include/linux/rcupdate.h:781 [inline] #6: ffffffff8e333d20 (rcu_read_lock){....}-{1:2}, at: kill_fasync+0x55/0x4d0 fs/fcntl.c:1048 the dependencies between SOFTIRQ-irq-safe lock and the holding lock: -> (&client->buffer_lock){..-.}-{2:2} { IN-SOFTIRQ-W at: lock_acquire+0x1ed/0x550 kernel/locking/lockdep.c:5754 __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+0xf2/0xad0 drivers/input/evdev.c:261 evdev_events+0x1c2/0x300 drivers/input/evdev.c:306 input_to_handler drivers/input/input.c:129 [inline] input_pass_values+0x84d/0x1200 drivers/input/input.c:161 input_event_dispose+0x402/0x650 drivers/input/input.c:389 input_handle_event+0xa71/0xbe0 drivers/input/input.c:406 input_event+0xa4/0xd0 drivers/input/input.c:435 hidinput_hid_event+0x138c/0x1ca0 drivers/hid/hid-input.c:1733 hid_process_event+0x439/0x590 drivers/hid/hid-core.c:1541 hid_process_report drivers/hid/hid-core.c:1689 [inline] hid_report_raw_event+0x1002/0x18a0 drivers/hid/hid-core.c:2016 hid_input_report+0x416/0x500 drivers/hid/hid-core.c:2090 hid_irq_in+0x4a0/0x6d0 drivers/hid/usbhid/hid-core.c:284 __usb_hcd_giveback_urb+0x373/0x530 drivers/usb/core/hcd.c:1648 dummy_timer+0x833/0x45f0 drivers/usb/gadget/udc/dummy_hcd.c:1987 call_timer_fn+0x18e/0x650 kernel/time/timer.c:1792 expire_timers kernel/time/timer.c:1843 [inline] __run_timers kernel/time/timer.c:2417 [inline] __run_timer_base+0x66a/0x8e0 kernel/time/timer.c:2428 run_timer_base kernel/time/timer.c:2437 [inline] run_timer_softirq+0xb7/0x170 kernel/time/timer.c:2447 handle_softirqs+0x2d6/0x990 kernel/softirq.c:554 __do_softirq kernel/softirq.c:588 [inline] invoke_softirq kernel/softirq.c:428 [inline] __irq_exit_rcu+0xf4/0x1c0 kernel/softirq.c:637 irq_exit_rcu+0x9/0x30 kernel/softirq.c:649 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1043 [inline] sysvec_apic_timer_interrupt+0xa6/0xc0 arch/x86/kernel/apic/apic.c:1043 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:702 native_safe_halt arch/x86/include/asm/irqflags.h:48 [inline] arch_safe_halt arch/x86/include/asm/irqflags.h:86 [inline] acpi_safe_halt+0x21/0x30 drivers/acpi/processor_idle.c:112 acpi_idle_enter+0xe4/0x140 drivers/acpi/processor_idle.c:707 cpuidle_enter_state+0x112/0x480 drivers/cpuidle/cpuidle.c:267 cpuidle_enter+0x5d/0xa0 drivers/cpuidle/cpuidle.c:388 call_cpuidle kernel/sched/idle.c:155 [inline] cpuidle_idle_call kernel/sched/idle.c:236 [inline] do_idle+0x375/0x5d0 kernel/sched/idle.c:332 cpu_startup_entry+0x42/0x60 kernel/sched/idle.c:430 __pfx_ap_starting+0x0/0x10 arch/x86/kernel/smpboot.c:313 common_startup_64+0x13e/0x147 INITIAL USE at: lock_acquire+0x1ed/0x550 kernel/locking/lockdep.c:5754 __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+0xf2/0xad0 drivers/input/evdev.c:261 evdev_events+0x1c2/0x300 drivers/input/evdev.c:306 input_to_handler drivers/input/input.c:129 [inline] input_pass_values+0x84d/0x1200 drivers/input/input.c:161 input_event_dispose+0x402/0x650 drivers/input/input.c:389 input_handle_event+0xa71/0xbe0 drivers/input/input.c:406 input_event+0xa4/0xd0 drivers/input/input.c:435 hidinput_hid_event+0x138c/0x1ca0 drivers/hid/hid-input.c:1733 hid_process_event+0x439/0x590 drivers/hid/hid-core.c:1541 hid_process_report drivers/hid/hid-core.c:1689 [inline] hid_report_raw_event+0x1002/0x18a0 drivers/hid/hid-core.c:2016 hid_input_report+0x416/0x500 drivers/hid/hid-core.c:2090 hid_irq_in+0x4a0/0x6d0 drivers/hid/usbhid/hid-core.c:284 __usb_hcd_giveback_urb+0x373/0x530 drivers/usb/core/hcd.c:1648 dummy_timer+0x833/0x45f0 drivers/usb/gadget/udc/dummy_hcd.c:1987 call_timer_fn+0x18e/0x650 kernel/time/timer.c:1792 expire_timers kernel/time/timer.c:1843 [inline] __run_timers kernel/time/timer.c:2417 [inline] __run_timer_base+0x66a/0x8e0 kernel/time/timer.c:2428 run_timer_base kernel/time/timer.c:2437 [inline] run_timer_softirq+0xb7/0x170 kernel/time/timer.c:2447 handle_softirqs+0x2d6/0x990 kernel/softirq.c:554 __do_softirq kernel/softirq.c:588 [inline] invoke_softirq kernel/softirq.c:428 [inline] __irq_exit_rcu+0xf4/0x1c0 kernel/softirq.c:637 irq_exit_rcu+0x9/0x30 kernel/softirq.c:649 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1043 [inline] sysvec_apic_timer_interrupt+0xa6/0xc0 arch/x86/kernel/apic/apic.c:1043 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:702 native_safe_halt arch/x86/include/asm/irqflags.h:48 [inline] arch_safe_halt arch/x86/include/asm/irqflags.h:86 [inline] acpi_safe_halt+0x21/0x30 drivers/acpi/processor_idle.c:112 acpi_idle_enter+0xe4/0x140 drivers/acpi/processor_idle.c:707 cpuidle_enter_state+0x112/0x480 drivers/cpuidle/cpuidle.c:267 cpuidle_enter+0x5d/0xa0 drivers/cpuidle/cpuidle.c:388 call_cpuidle kernel/sched/idle.c:155 [inline] cpuidle_idle_call kernel/sched/idle.c:236 [inline] do_idle+0x375/0x5d0 kernel/sched/idle.c:332 cpu_startup_entry+0x42/0x60 kernel/sched/idle.c:430 __pfx_ap_starting+0x0/0x10 arch/x86/kernel/smpboot.c:313 common_startup_64+0x13e/0x147 } ... key at: [] evdev_open.__key.24+0x0/0x20 the dependencies between the lock to be acquired and SOFTIRQ-irq-unsafe lock: -> (tasklist_lock){.+.+}-{2:2} { HARDIRQ-ON-R at: lock_acquire+0x1ed/0x550 kernel/locking/lockdep.c:5754 __raw_read_lock include/linux/rwlock_api_smp.h:150 [inline] _raw_read_lock+0x36/0x50 kernel/locking/spinlock.c:228 __do_wait+0x12d/0x850 kernel/exit.c:1586 do_wait+0x1e9/0x560 kernel/exit.c:1630 kernel_wait+0xe9/0x240 kernel/exit.c:1806 call_usermodehelper_exec_sync kernel/umh.c:137 [inline] call_usermodehelper_exec_work+0xbd/0x230 kernel/umh.c:164 process_one_work kernel/workqueue.c:3231 [inline] process_scheduled_works+0xa2c/0x1830 kernel/workqueue.c:3312 worker_thread+0x86d/0xd70 kernel/workqueue.c:3393 kthread+0x2f0/0x390 kernel/kthread.c:389 ret_from_fork+0x4b/0x80 arch/x86/kernel/process.c:147 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244 SOFTIRQ-ON-R at: lock_acquire+0x1ed/0x550 kernel/locking/lockdep.c:5754 __raw_read_lock include/linux/rwlock_api_smp.h:150 [inline] _raw_read_lock+0x36/0x50 kernel/locking/spinlock.c:228 __do_wait+0x12d/0x850 kernel/exit.c:1586 do_wait+0x1e9/0x560 kernel/exit.c:1630 kernel_wait+0xe9/0x240 kernel/exit.c:1806 call_usermodehelper_exec_sync kernel/umh.c:137 [inline] call_usermodehelper_exec_work+0xbd/0x230 kernel/umh.c:164 process_one_work kernel/workqueue.c:3231 [inline] process_scheduled_works+0xa2c/0x1830 kernel/workqueue.c:3312 worker_thread+0x86d/0xd70 kernel/workqueue.c:3393 kthread+0x2f0/0x390 kernel/kthread.c:389 ret_from_fork+0x4b/0x80 arch/x86/kernel/process.c:147 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244 INITIAL USE at: lock_acquire+0x1ed/0x550 kernel/locking/lockdep.c:5754 __raw_write_lock_irq include/linux/rwlock_api_smp.h:195 [inline] _raw_write_lock_irq+0xd3/0x120 kernel/locking/spinlock.c:326 copy_process+0x228b/0x3dc0 kernel/fork.c:2516 kernel_clone+0x226/0x8f0 kernel/fork.c:2797 user_mode_thread+0x132/0x1a0 kernel/fork.c:2875 rest_init+0x23/0x300 init/main.c:712 start_kernel+0x47a/0x500 init/main.c:1103 x86_64_start_reservations+0x2a/0x30 arch/x86/kernel/head64.c:507 x86_64_start_kernel+0x99/0xa0 arch/x86/kernel/head64.c:488 common_startup_64+0x13e/0x147 INITIAL READ USE at: lock_acquire+0x1ed/0x550 kernel/locking/lockdep.c:5754 __raw_read_lock include/linux/rwlock_api_smp.h:150 [inline] _raw_read_lock+0x36/0x50 kernel/locking/spinlock.c:228 __do_wait+0x12d/0x850 kernel/exit.c:1586 do_wait+0x1e9/0x560 kernel/exit.c:1630 kernel_wait+0xe9/0x240 kernel/exit.c:1806 call_usermodehelper_exec_sync kernel/umh.c:137 [inline] call_usermodehelper_exec_work+0xbd/0x230 kernel/umh.c:164 process_one_work kernel/workqueue.c:3231 [inline] process_scheduled_works+0xa2c/0x1830 kernel/workqueue.c:3312 worker_thread+0x86d/0xd70 kernel/workqueue.c:3393 kthread+0x2f0/0x390 kernel/kthread.c:389 ret_from_fork+0x4b/0x80 arch/x86/kernel/process.c:147 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244 } ... key at: [] tasklist_lock+0x18/0x40 ... acquired at: lock_acquire+0x1ed/0x550 kernel/locking/lockdep.c:5754 __raw_read_lock include/linux/rwlock_api_smp.h:150 [inline] _raw_read_lock+0x36/0x50 kernel/locking/spinlock.c:228 send_sigio+0xfc/0x360 fs/fcntl.c:830 dnotify_handle_event+0x13c/0x440 fs/notify/dnotify/dnotify.c:114 fsnotify_handle_event fs/notify/fsnotify.c:336 [inline] send_to_group fs/notify/fsnotify.c:384 [inline] fsnotify+0x18ab/0x1f70 fs/notify/fsnotify.c:593 fsnotify_parent include/linux/fsnotify.h:99 [inline] fsnotify_file include/linux/fsnotify.h:125 [inline] fsnotify_access include/linux/fsnotify.h:374 [inline] vfs_readv+0x91e/0xa90 fs/read_write.c:937 do_preadv fs/read_write.c:1049 [inline] __do_sys_preadv fs/read_write.c:1099 [inline] __se_sys_preadv fs/read_write.c:1094 [inline] __x64_sys_preadv+0x1c7/0x2d0 fs/read_write.c:1094 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xf5/0x240 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x77/0x7f -> (&f->f_owner.lock){....}-{2:2} { INITIAL USE at: lock_acquire+0x1ed/0x550 kernel/locking/lockdep.c:5754 __raw_write_lock_irq include/linux/rwlock_api_smp.h:195 [inline] _raw_write_lock_irq+0xd3/0x120 kernel/locking/spinlock.c:326 f_modown+0x38/0x340 fs/fcntl.c:93 fcntl_dirnotify+0x57d/0x740 fs/notify/dnotify/dnotify.c:368 do_fcntl+0x492/0x1730 fs/fcntl.c:441 __do_sys_fcntl fs/fcntl.c:492 [inline] __se_sys_fcntl+0xd2/0x1c0 fs/fcntl.c:477 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xf5/0x240 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x77/0x7f INITIAL READ USE at: lock_acquire+0x1ed/0x550 kernel/locking/lockdep.c:5754 __raw_read_lock_irqsave include/linux/rwlock_api_smp.h:160 [inline] _raw_read_lock_irqsave+0xdd/0x130 kernel/locking/spinlock.c:236 send_sigio+0x33/0x360 fs/fcntl.c:816 kill_fasync_rcu fs/fcntl.c:1035 [inline] kill_fasync+0x23a/0x4d0 fs/fcntl.c:1049 fuse_dev_wake_and_unlock+0x38/0x50 fs/fuse/dev.c:214 queue_request_and_unlock fs/fuse/dev.c:233 [inline] flush_bg_queue+0x6a7/0x810 fs/fuse/dev.c:268 fuse_request_queue_background fs/fuse/dev.c:542 [inline] fuse_simple_background+0x697/0x8c0 fs/fuse/dev.c:570 fuse_file_put+0x198/0x200 fs/fuse/file.c:118 fuse_dir_release+0x1a/0x30 fs/fuse/dir.c:1670 __fput+0x406/0x8b0 fs/file_table.c:422 task_work_run+0x24f/0x310 kernel/task_work.c:180 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:328 [inline] __syscall_exit_to_user_mode_work kernel/entry/common.c:207 [inline] syscall_exit_to_user_mode+0x168/0x370 kernel/entry/common.c:218 do_syscall_64+0x102/0x240 arch/x86/entry/common.c:89 entry_SYSCALL_64_after_hwframe+0x77/0x7f } ... key at: [] init_file.__key+0x0/0x20 ... acquired at: lock_acquire+0x1ed/0x550 kernel/locking/lockdep.c:5754 __raw_read_lock_irqsave include/linux/rwlock_api_smp.h:160 [inline] _raw_read_lock_irqsave+0xdd/0x130 kernel/locking/spinlock.c:236 send_sigio+0x33/0x360 fs/fcntl.c:816 kill_fasync_rcu fs/fcntl.c:1035 [inline] kill_fasync+0x23a/0x4d0 fs/fcntl.c:1049 fuse_dev_wake_and_unlock+0x38/0x50 fs/fuse/dev.c:214 queue_request_and_unlock fs/fuse/dev.c:233 [inline] flush_bg_queue+0x6a7/0x810 fs/fuse/dev.c:268 fuse_request_queue_background fs/fuse/dev.c:542 [inline] fuse_simple_background+0x697/0x8c0 fs/fuse/dev.c:570 fuse_file_put+0x198/0x200 fs/fuse/file.c:118 fuse_dir_release+0x1a/0x30 fs/fuse/dir.c:1670 __fput+0x406/0x8b0 fs/file_table.c:422 task_work_run+0x24f/0x310 kernel/task_work.c:180 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:328 [inline] __syscall_exit_to_user_mode_work kernel/entry/common.c:207 [inline] syscall_exit_to_user_mode+0x168/0x370 kernel/entry/common.c:218 do_syscall_64+0x102/0x240 arch/x86/entry/common.c:89 entry_SYSCALL_64_after_hwframe+0x77/0x7f -> (&new->fa_lock){....}-{2:2} { INITIAL USE at: lock_acquire+0x1ed/0x550 kernel/locking/lockdep.c:5754 __raw_write_lock_irq include/linux/rwlock_api_smp.h:195 [inline] _raw_write_lock_irq+0xd3/0x120 kernel/locking/spinlock.c:326 fasync_remove_entry+0xff/0x1d0 fs/fcntl.c:905 __fput+0x745/0x8b0 fs/file_table.c:419 task_work_run+0x24f/0x310 kernel/task_work.c:180 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:328 [inline] __syscall_exit_to_user_mode_work kernel/entry/common.c:207 [inline] syscall_exit_to_user_mode+0x168/0x370 kernel/entry/common.c:218 do_syscall_64+0x102/0x240 arch/x86/entry/common.c:89 entry_SYSCALL_64_after_hwframe+0x77/0x7f INITIAL READ USE at: lock_acquire+0x1ed/0x550 kernel/locking/lockdep.c:5754 __raw_read_lock_irqsave include/linux/rwlock_api_smp.h:160 [inline] _raw_read_lock_irqsave+0xdd/0x130 kernel/locking/spinlock.c:236 kill_fasync_rcu fs/fcntl.c:1028 [inline] kill_fasync+0x19e/0x4d0 fs/fcntl.c:1049 fuse_dev_wake_and_unlock+0x38/0x50 fs/fuse/dev.c:214 queue_request_and_unlock fs/fuse/dev.c:233 [inline] flush_bg_queue+0x6a7/0x810 fs/fuse/dev.c:268 fuse_request_queue_background fs/fuse/dev.c:542 [inline] fuse_simple_background+0x697/0x8c0 fs/fuse/dev.c:570 fuse_file_put+0x198/0x200 fs/fuse/file.c:118 fuse_dir_release+0x1a/0x30 fs/fuse/dir.c:1670 __fput+0x406/0x8b0 fs/file_table.c:422 task_work_run+0x24f/0x310 kernel/task_work.c:180 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:328 [inline] __syscall_exit_to_user_mode_work kernel/entry/common.c:207 [inline] syscall_exit_to_user_mode+0x168/0x370 kernel/entry/common.c:218 do_syscall_64+0x102/0x240 arch/x86/entry/common.c:89 entry_SYSCALL_64_after_hwframe+0x77/0x7f } ... key at: [] fasync_insert_entry.__key+0x0/0x20 ... acquired at: lock_acquire+0x1ed/0x550 kernel/locking/lockdep.c:5754 __raw_read_lock_irqsave include/linux/rwlock_api_smp.h:160 [inline] _raw_read_lock_irqsave+0xdd/0x130 kernel/locking/spinlock.c:236 kill_fasync_rcu fs/fcntl.c:1028 [inline] kill_fasync+0x19e/0x4d0 fs/fcntl.c:1049 __pass_event drivers/input/evdev.c:240 [inline] evdev_pass_values+0x58a/0xad0 drivers/input/evdev.c:278 evdev_events+0x1c2/0x300 drivers/input/evdev.c:306 input_to_handler drivers/input/input.c:129 [inline] input_pass_values+0x84d/0x1200 drivers/input/input.c:161 input_event_dispose+0x36c/0x650 drivers/input/input.c:378 input_handle_event+0xa71/0xbe0 drivers/input/input.c:406 input_inject_event+0x22f/0x340 drivers/input/input.c:465 evdev_write+0x672/0x7c0 drivers/input/evdev.c:530 vfs_write+0x2a2/0xc90 fs/read_write.c:588 ksys_write+0x1a0/0x2c0 fs/read_write.c:643 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xf5/0x240 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x77/0x7f stack backtrace: CPU: 0 PID: 12491 Comm: syz-executor.1 Not tainted 6.9.0-syzkaller-10323-g8f6a15f095a6 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/02/2024 Call Trace: __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0x241/0x360 lib/dump_stack.c:114 print_bad_irq_dependency kernel/locking/lockdep.c:2626 [inline] check_irq_usage kernel/locking/lockdep.c:2865 [inline] check_prev_add kernel/locking/lockdep.c:3138 [inline] check_prevs_add kernel/locking/lockdep.c:3253 [inline] validate_chain+0x4dc7/0x58e0 kernel/locking/lockdep.c:3869 __lock_acquire+0x1346/0x1fd0 kernel/locking/lockdep.c:5137 lock_acquire+0x1ed/0x550 kernel/locking/lockdep.c:5754 __raw_read_lock_irqsave include/linux/rwlock_api_smp.h:160 [inline] _raw_read_lock_irqsave+0xdd/0x130 kernel/locking/spinlock.c:236 kill_fasync_rcu fs/fcntl.c:1028 [inline] kill_fasync+0x19e/0x4d0 fs/fcntl.c:1049 __pass_event drivers/input/evdev.c:240 [inline] evdev_pass_values+0x58a/0xad0 drivers/input/evdev.c:278 evdev_events+0x1c2/0x300 drivers/input/evdev.c:306 input_to_handler drivers/input/input.c:129 [inline] input_pass_values+0x84d/0x1200 drivers/input/input.c:161 input_event_dispose+0x36c/0x650 drivers/input/input.c:378 input_handle_event+0xa71/0xbe0 drivers/input/input.c:406 input_inject_event+0x22f/0x340 drivers/input/input.c:465 evdev_write+0x672/0x7c0 drivers/input/evdev.c:530 vfs_write+0x2a2/0xc90 fs/read_write.c:588 ksys_write+0x1a0/0x2c0 fs/read_write.c:643 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xf5/0x240 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7fc88887cee9 Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 e1 20 00 00 90 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 b0 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007fc8895d30c8 EFLAGS: 00000246 ORIG_RAX: 0000000000000001 RAX: ffffffffffffffda RBX: 00007fc8889abf80 RCX: 00007fc88887cee9 RDX: 0000000000002250 RSI: 0000000020000040 RDI: 0000000000000004 RBP: 00007fc8888c949e R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 000000000000000b R14: 00007fc8889abf80 R15: 00007fc888acfa98