syzbot

=====================================================
WARNING: SOFTIRQ-safe -> SOFTIRQ-unsafe lock order detected
syzkaller #0 Not tainted
-----------------------------------------------------
syz.7.8060/24526 [HC0[0]:SC0[0]:HE0:SE1] is trying to acquire:
ffff88807bc029f0 (&new->fa_lock){....}-{3:3}, at: kill_fasync_rcu fs/fcntl.c:1124 [inline]
ffff88807bc029f0 (&new->fa_lock){....}-{3:3}, at: kill_fasync fs/fcntl.c:1148 [inline]
ffff88807bc029f0 (&new->fa_lock){....}-{3:3}, at: kill_fasync+0x138/0x510 fs/fcntl.c:1141

and this task is already holding:
ffff888079413028 (&client->buffer_lock){..-.}-{3:3}, at: spin_lock include/linux/spinlock.h:351 [inline]
ffff888079413028 (&client->buffer_lock){..-.}-{3:3}, at: evdev_pass_values+0x10e/0x9b0 drivers/input/evdev.c:261
which would create a new lock dependency:
 (&client->buffer_lock){..-.}-{3:3} -> (&new->fa_lock){....}-{3:3}

but this new dependency connects a SOFTIRQ-irq-safe lock:
 (&client->buffer_lock){..-.}-{3:3}

... which became SOFTIRQ-irq-safe at:
  lock_acquire kernel/locking/lockdep.c:5868 [inline]
  lock_acquire+0x179/0x350 kernel/locking/lockdep.c:5825
  __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+0x74b/0x880 drivers/input/input.c:127
  input_event_dispose drivers/input/input.c:352 [inline]
  input_handle_event+0xb29/0x14d0 drivers/input/input.c:369
  input_inject_event+0x1e8/0x3b0 drivers/input/input.c:423
  kd_sound_helper+0x20f/0x280 drivers/tty/vt/keyboard.c:261
  input_handler_for_each_handle+0xd4/0x250 drivers/input/input.c:2554
  call_timer_fn+0x197/0x620 kernel/time/timer.c:1747
  expire_timers kernel/time/timer.c:1798 [inline]
  __run_timers+0x6ef/0x960 kernel/time/timer.c:2372
  __run_timer_base kernel/time/timer.c:2384 [inline]
  __run_timer_base kernel/time/timer.c:2376 [inline]
  run_timer_base+0x114/0x190 kernel/time/timer.c:2393
  run_timer_softirq+0x1a/0x40 kernel/time/timer.c:2403
  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:1050 [inline]
  sysvec_apic_timer_interrupt+0xa4/0xc0 arch/x86/kernel/apic/apic.c:1050
  asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:702
  console_flush_all+0x9a2/0xc60 kernel/printk/printk.c:3227
  __console_flush_and_unlock kernel/printk/printk.c:3285 [inline]
  console_unlock+0xd8/0x210 kernel/printk/printk.c:3325
  vprintk_emit+0x418/0x6d0 kernel/printk/printk.c:2450
  dev_vprintk_emit drivers/base/core.c:4914 [inline]
  dev_printk_emit+0xfa/0x140 drivers/base/core.c:4925
  __dev_printk+0xf5/0x270 drivers/base/core.c:4937
  _dev_info+0xe4/0x120 drivers/base/core.c:4983
  usb_disconnect+0xec/0x9c0 drivers/usb/core/hub.c:2326
  hub_port_connect drivers/usb/core/hub.c:5406 [inline]
  hub_port_connect_change drivers/usb/core/hub.c:5706 [inline]
  port_event drivers/usb/core/hub.c:5870 [inline]
  hub_event+0x1c81/0x4fe0 drivers/usb/core/hub.c:5952
  process_one_work+0x9cf/0x1b70 kernel/workqueue.c:3236
  process_scheduled_works kernel/workqueue.c:3319 [inline]
  worker_thread+0x6c8/0xf10 kernel/workqueue.c:3400
  kthread+0x3c5/0x780 kernel/kthread.c:463
  ret_from_fork+0x5d4/0x6f0 arch/x86/kernel/process.c:148
  ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245

to a SOFTIRQ-irq-unsafe lock:
 (tasklist_lock){.+.+}-{3:3}

... which became SOFTIRQ-irq-unsafe at:
...
  lock_acquire kernel/locking/lockdep.c:5868 [inline]
  lock_acquire+0x179/0x350 kernel/locking/lockdep.c:5825
  __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:3236
  process_scheduled_works kernel/workqueue.c:3319 [inline]
  worker_thread+0x6c8/0xf10 kernel/workqueue.c:3400
  kthread+0x3c5/0x780 kernel/kthread.c:463
  ret_from_fork+0x5d4/0x6f0 arch/x86/kernel/process.c:148
  ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245

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);
  <Interrupt>
    lock(&client->buffer_lock);

 *** DEADLOCK ***

7 locks held by syz.7.8060/24526:
 #0: ffff88802b024118 (&evdev->mutex){+.+.}-{4:4}, at: evdev_write+0x206/0x750 drivers/input/evdev.c:511
 #1: ffff88801f7db230 (&dev->event_lock#2){..-.}-{3:3}, at: class_spinlock_irqsave_constructor include/linux/spinlock.h:585 [inline]
 #1: ffff88801f7db230 (&dev->event_lock#2){..-.}-{3:3}, at: input_inject_event+0x9f/0x3b0 drivers/input/input.c:418
 #2: ffffffff8e5c1220 (rcu_read_lock){....}-{1:3}, at: rcu_lock_acquire include/linux/rcupdate.h:331 [inline]
 #2: ffffffff8e5c1220 (rcu_read_lock){....}-{1:3}, at: rcu_read_lock include/linux/rcupdate.h:841 [inline]
 #2: ffffffff8e5c1220 (rcu_read_lock){....}-{1:3}, at: class_rcu_constructor include/linux/rcupdate.h:1155 [inline]
 #2: ffffffff8e5c1220 (rcu_read_lock){....}-{1:3}, at: input_inject_event+0xbb/0x3b0 drivers/input/input.c:419
 #3: ffffffff8e5c1220 (rcu_read_lock){....}-{1:3}, at: rcu_lock_acquire include/linux/rcupdate.h:331 [inline]
 #3: ffffffff8e5c1220 (rcu_read_lock){....}-{1:3}, at: rcu_read_lock include/linux/rcupdate.h:841 [inline]
 #3: ffffffff8e5c1220 (rcu_read_lock){....}-{1:3}, at: class_rcu_constructor include/linux/rcupdate.h:1155 [inline]
 #3: ffffffff8e5c1220 (rcu_read_lock){....}-{1:3}, at: input_pass_values+0x80/0x880 drivers/input/input.c:118
 #4: ffffffff8e5c1220 (rcu_read_lock){....}-{1:3}, at: rcu_lock_acquire include/linux/rcupdate.h:331 [inline]
 #4: ffffffff8e5c1220 (rcu_read_lock){....}-{1:3}, at: rcu_read_lock include/linux/rcupdate.h:841 [inline]
 #4: ffffffff8e5c1220 (rcu_read_lock){....}-{1:3}, at: evdev_events+0x7b/0x390 drivers/input/evdev.c:298
 #5: ffff888079413028 (&client->buffer_lock){..-.}-{3:3}, at: spin_lock include/linux/spinlock.h:351 [inline]
 #5: ffff888079413028 (&client->buffer_lock){..-.}-{3:3}, at: evdev_pass_values+0x10e/0x9b0 drivers/input/evdev.c:261
 #6: ffffffff8e5c1220 (rcu_read_lock){....}-{1:3}, at: rcu_lock_acquire include/linux/rcupdate.h:331 [inline]
 #6: ffffffff8e5c1220 (rcu_read_lock){....}-{1:3}, at: rcu_read_lock include/linux/rcupdate.h:841 [inline]
 #6: ffffffff8e5c1220 (rcu_read_lock){....}-{1:3}, at: kill_fasync fs/fcntl.c:1147 [inline]
 #6: ffffffff8e5c1220 (rcu_read_lock){....}-{1:3}, at: kill_fasync+0x62/0x510 fs/fcntl.c:1141

the dependencies between SOFTIRQ-irq-safe lock and the holding lock:
-> (&client->buffer_lock){..-.}-{3:3} {
   IN-SOFTIRQ-W at:
                    lock_acquire kernel/locking/lockdep.c:5868 [inline]
                    lock_acquire+0x179/0x350 kernel/locking/lockdep.c:5825
                    __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+0x74b/0x880 drivers/input/input.c:127
                    input_event_dispose drivers/input/input.c:352 [inline]
                    input_handle_event+0xb29/0x14d0 drivers/input/input.c:369
                    input_inject_event+0x1e8/0x3b0 drivers/input/input.c:423
                    kd_sound_helper+0x20f/0x280 drivers/tty/vt/keyboard.c:261
                    input_handler_for_each_handle+0xd4/0x250 drivers/input/input.c:2554
                    call_timer_fn+0x197/0x620 kernel/time/timer.c:1747
                    expire_timers kernel/time/timer.c:1798 [inline]
                    __run_timers+0x6ef/0x960 kernel/time/timer.c:2372
                    __run_timer_base kernel/time/timer.c:2384 [inline]
                    __run_timer_base kernel/time/timer.c:2376 [inline]
                    run_timer_base+0x114/0x190 kernel/time/timer.c:2393
                    run_timer_softirq+0x1a/0x40 kernel/time/timer.c:2403
                    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:1050 [inline]
                    sysvec_apic_timer_interrupt+0xa4/0xc0 arch/x86/kernel/apic/apic.c:1050
                    asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:702
                    console_flush_all+0x9a2/0xc60 kernel/printk/printk.c:3227
                    __console_flush_and_unlock kernel/printk/printk.c:3285 [inline]
                    console_unlock+0xd8/0x210 kernel/printk/printk.c:3325
                    vprintk_emit+0x418/0x6d0 kernel/printk/printk.c:2450
                    dev_vprintk_emit drivers/base/core.c:4914 [inline]
                    dev_printk_emit+0xfa/0x140 drivers/base/core.c:4925
                    __dev_printk+0xf5/0x270 drivers/base/core.c:4937
                    _dev_info+0xe4/0x120 drivers/base/core.c:4983
                    usb_disconnect+0xec/0x9c0 drivers/usb/core/hub.c:2326
                    hub_port_connect drivers/usb/core/hub.c:5406 [inline]
                    hub_port_connect_change drivers/usb/core/hub.c:5706 [inline]
                    port_event drivers/usb/core/hub.c:5870 [inline]
                    hub_event+0x1c81/0x4fe0 drivers/usb/core/hub.c:5952
                    process_one_work+0x9cf/0x1b70 kernel/workqueue.c:3236
                    process_scheduled_works kernel/workqueue.c:3319 [inline]
                    worker_thread+0x6c8/0xf10 kernel/workqueue.c:3400
                    kthread+0x3c5/0x780 kernel/kthread.c:463
                    ret_from_fork+0x5d4/0x6f0 arch/x86/kernel/process.c:148
                    ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
   INITIAL USE at:
                   lock_acquire kernel/locking/lockdep.c:5868 [inline]
                   lock_acquire+0x179/0x350 kernel/locking/lockdep.c:5825
                   __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+0x74b/0x880 drivers/input/input.c:127
                   input_event_dispose drivers/input/input.c:352 [inline]
                   input_handle_event+0xb29/0x14d0 drivers/input/input.c:369
                   input_inject_event+0x1e8/0x3b0 drivers/input/input.c:423
                   kd_sound_helper+0x20f/0x280 drivers/tty/vt/keyboard.c:261
                   input_handler_for_each_handle+0xd4/0x250 drivers/input/input.c:2554
                   call_timer_fn+0x197/0x620 kernel/time/timer.c:1747
                   expire_timers kernel/time/timer.c:1798 [inline]
                   __run_timers+0x6ef/0x960 kernel/time/timer.c:2372
                   __run_timer_base kernel/time/timer.c:2384 [inline]
                   __run_timer_base kernel/time/timer.c:2376 [inline]
                   run_timer_base+0x114/0x190 kernel/time/timer.c:2393
                   run_timer_softirq+0x1a/0x40 kernel/time/timer.c:2403
                   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:1050 [inline]
                   sysvec_apic_timer_interrupt+0xa4/0xc0 arch/x86/kernel/apic/apic.c:1050
                   asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:702
                   console_flush_all+0x9a2/0xc60 kernel/printk/printk.c:3227
                   __console_flush_and_unlock kernel/printk/printk.c:3285 [inline]
                   console_unlock+0xd8/0x210 kernel/printk/printk.c:3325
                   vprintk_emit+0x418/0x6d0 kernel/printk/printk.c:2450
                   dev_vprintk_emit drivers/base/core.c:4914 [inline]
                   dev_printk_emit+0xfa/0x140 drivers/base/core.c:4925
                   __dev_printk+0xf5/0x270 drivers/base/core.c:4937
                   _dev_info+0xe4/0x120 drivers/base/core.c:4983
                   usb_disconnect+0xec/0x9c0 drivers/usb/core/hub.c:2326
                   hub_port_connect drivers/usb/core/hub.c:5406 [inline]
                   hub_port_connect_change drivers/usb/core/hub.c:5706 [inline]
                   port_event drivers/usb/core/hub.c:5870 [inline]
                   hub_event+0x1c81/0x4fe0 drivers/usb/core/hub.c:5952
                   process_one_work+0x9cf/0x1b70 kernel/workqueue.c:3236
                   process_scheduled_works kernel/workqueue.c:3319 [inline]
                   worker_thread+0x6c8/0xf10 kernel/workqueue.c:3400
                   kthread+0x3c5/0x780 kernel/kthread.c:463
                   ret_from_fork+0x5d4/0x6f0 arch/x86/kernel/process.c:148
                   ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
 }
 ... key      at: [<ffffffff9b1603e0>] __key.1+0x0/0x40

the dependencies between the lock to be acquired
 and SOFTIRQ-irq-unsafe lock:
  -> (tasklist_lock){.+.+}-{3:3} {
     HARDIRQ-ON-R at:
                        lock_acquire kernel/locking/lockdep.c:5868 [inline]
                        lock_acquire+0x179/0x350 kernel/locking/lockdep.c:5825
                        __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:3236
                        process_scheduled_works kernel/workqueue.c:3319 [inline]
                        worker_thread+0x6c8/0xf10 kernel/workqueue.c:3400
                        kthread+0x3c5/0x780 kernel/kthread.c:463
                        ret_from_fork+0x5d4/0x6f0 arch/x86/kernel/process.c:148
                        ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
     SOFTIRQ-ON-R at:
                        lock_acquire kernel/locking/lockdep.c:5868 [inline]
                        lock_acquire+0x179/0x350 kernel/locking/lockdep.c:5825
                        __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:3236
                        process_scheduled_works kernel/workqueue.c:3319 [inline]
                        worker_thread+0x6c8/0xf10 kernel/workqueue.c:3400
                        kthread+0x3c5/0x780 kernel/kthread.c:463
                        ret_from_fork+0x5d4/0x6f0 arch/x86/kernel/process.c:148
                        ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
     INITIAL USE at:
                       lock_acquire kernel/locking/lockdep.c:5868 [inline]
                       lock_acquire+0x179/0x350 kernel/locking/lockdep.c:5825
                       __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+0x4caf/0x7690 kernel/fork.c:2321
                       kernel_clone+0xfc/0x930 kernel/fork.c:2605
                       user_mode_thread+0xc7/0x110 kernel/fork.c:2683
                       rest_init+0x23/0x2b0 init/main.c:709
                       start_kernel+0x3ee/0x4d0 init/main.c:1097
                       x86_64_start_reservations+0x18/0x30 arch/x86/kernel/head64.c:307
                       x86_64_start_kernel+0x130/0x190 arch/x86/kernel/head64.c:288
                       common_startup_64+0x13e/0x148
     INITIAL READ USE at:
                            lock_acquire kernel/locking/lockdep.c:5868 [inline]
                            lock_acquire+0x179/0x350 kernel/locking/lockdep.c:5825
                            __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:3236
                            process_scheduled_works kernel/workqueue.c:3319 [inline]
                            worker_thread+0x6c8/0xf10 kernel/workqueue.c:3400
                            kthread+0x3c5/0x780 kernel/kthread.c:463
                            ret_from_fork+0x5d4/0x6f0 arch/x86/kernel/process.c:148
                            ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
   }
   ... key      at: [<ffffffff8e20c098>] 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+0x1e2/0x3f0 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:404 [inline]
   vfs_mkdir+0x71d/0x8c0 fs/namei.c:4374
   do_mkdirat+0x304/0x3e0 fs/namei.c:4399
   __do_sys_mkdirat fs/namei.c:4416 [inline]
   __se_sys_mkdirat fs/namei.c:4414 [inline]
   __x64_sys_mkdirat+0x83/0xb0 fs/namei.c:4414
   do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
   do_syscall_64+0xcd/0x4c0 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:5868 [inline]
                     lock_acquire+0x179/0x350 kernel/locking/lockdep.c:5825
                     __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
                     generic_add_lease fs/locks.c:1874 [inline]
                     generic_setlease fs/locks.c:1942 [inline]
                     generic_setlease+0xeef/0x1300 fs/locks.c:1929
                     kernel_setlease+0x106/0x140 fs/locks.c:1991
                     vfs_setlease+0x258/0x2d0 fs/locks.c:2026
                     do_fcntl_add_lease fs/locks.c:2047 [inline]
                     fcntl_setlease+0x3ed/0x5a0 fs/locks.c:2069
                     do_fcntl+0x751/0x15a0 fs/fcntl.c:536
                     __do_sys_fcntl fs/fcntl.c:591 [inline]
                     __se_sys_fcntl fs/fcntl.c:576 [inline]
                     __x64_sys_fcntl+0x163/0x200 fs/fcntl.c:576
                     do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
                     do_syscall_64+0xcd/0x4c0 arch/x86/entry/syscall_64.c:94
                     entry_SYSCALL_64_after_hwframe+0x77/0x7f
    INITIAL READ USE at:
                          lock_acquire kernel/locking/lockdep.c:5868 [inline]
                          lock_acquire+0x179/0x350 kernel/locking/lockdep.c:5825
                          __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+0x674/0x1810 fs/locks.c:1592
                          break_lease include/linux/filelock.h:446 [inline]
                          do_dentry_open+0x91f/0x1530 fs/open.c:956
                          vfs_open+0x82/0x3f0 fs/open.c:1095
                          do_open fs/namei.c:3887 [inline]
                          path_openat+0x1de4/0x2cb0 fs/namei.c:4046
                          do_filp_open+0x20b/0x470 fs/namei.c:4073
                          do_sys_openat2+0x11b/0x1d0 fs/open.c:1435
                          do_sys_open fs/open.c:1450 [inline]
                          __do_sys_open fs/open.c:1458 [inline]
                          __se_sys_open fs/open.c:1454 [inline]
                          __x64_sys_open+0x153/0x1e0 fs/open.c:1454
                          do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
                          do_syscall_64+0xcd/0x4c0 arch/x86/entry/syscall_64.c:94
                          entry_SYSCALL_64_after_hwframe+0x77/0x7f
  }
  ... key      at: [<ffffffff9ae90360>] __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+0x674/0x1810 fs/locks.c:1592
   break_lease include/linux/filelock.h:446 [inline]
   do_dentry_open+0x91f/0x1530 fs/open.c:956
   vfs_open+0x82/0x3f0 fs/open.c:1095
   do_open fs/namei.c:3887 [inline]
   path_openat+0x1de4/0x2cb0 fs/namei.c:4046
   do_filp_open+0x20b/0x470 fs/namei.c:4073
   do_sys_openat2+0x11b/0x1d0 fs/open.c:1435
   do_sys_open fs/open.c:1450 [inline]
   __do_sys_open fs/open.c:1458 [inline]
   __se_sys_open fs/open.c:1454 [inline]
   __x64_sys_open+0x153/0x1e0 fs/open.c:1454
   do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
   do_syscall_64+0xcd/0x4c0 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:5868 [inline]
                   lock_acquire+0x179/0x350 kernel/locking/lockdep.c:5825
                   __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/0x5c0 fs/locks.c:2700
                   __fput+0x351/0xb70 fs/file_table.c:460
                   task_work_run+0x14d/0x240 kernel/task_work.c:227
                   resume_user_mode_work include/linux/resume_user_mode.h:50 [inline]
                   exit_to_user_mode_loop+0xeb/0x110 kernel/entry/common.c:43
                   exit_to_user_mode_prepare include/linux/irq-entry-common.h:225 [inline]
                   syscall_exit_to_user_mode_work include/linux/entry-common.h:175 [inline]
                   syscall_exit_to_user_mode include/linux/entry-common.h:210 [inline]
                   do_syscall_64+0x3f6/0x4c0 arch/x86/entry/syscall_64.c:100
                   entry_SYSCALL_64_after_hwframe+0x77/0x7f
   INITIAL READ USE at:
                        lock_acquire kernel/locking/lockdep.c:5868 [inline]
                        lock_acquire+0x179/0x350 kernel/locking/lockdep.c:5825
                        __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+0x674/0x1810 fs/locks.c:1592
                        break_lease include/linux/filelock.h:446 [inline]
                        do_dentry_open+0x91f/0x1530 fs/open.c:956
                        vfs_open+0x82/0x3f0 fs/open.c:1095
                        do_open fs/namei.c:3887 [inline]
                        path_openat+0x1de4/0x2cb0 fs/namei.c:4046
                        do_filp_open+0x20b/0x470 fs/namei.c:4073
                        do_sys_openat2+0x11b/0x1d0 fs/open.c:1435
                        do_sys_open fs/open.c:1450 [inline]
                        __do_sys_open fs/open.c:1458 [inline]
                        __se_sys_open fs/open.c:1454 [inline]
                        __x64_sys_open+0x153/0x1e0 fs/open.c:1454
                        do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
                        do_syscall_64+0xcd/0x4c0 arch/x86/entry/syscall_64.c:94
                        entry_SYSCALL_64_after_hwframe+0x77/0x7f
 }
 ... key      at: [<ffffffff9ae90320>] __key.0+0x0/0x40
 ... acquired at:
   lock_acquire kernel/locking/lockdep.c:5868 [inline]
   lock_acquire+0x179/0x350 kernel/locking/lockdep.c:5825
   __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+0x74b/0x880 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+0x1e8/0x3b0 drivers/input/input.c:423
   evdev_write+0x457/0x750 drivers/input/evdev.c:528
   vfs_write+0x29d/0x11d0 fs/read_write.c:684
   ksys_write+0x1f8/0x250 fs/read_write.c:738
   do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
   do_syscall_64+0xcd/0x4c0 arch/x86/entry/syscall_64.c:94
   entry_SYSCALL_64_after_hwframe+0x77/0x7f


stack backtrace:
CPU: 0 UID: 0 PID: 24526 Comm: syz.7.8060 Not tainted syzkaller #0 PREEMPT(full) 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/12/2025
Call Trace:
 <TASK>
 __dump_stack lib/dump_stack.c:94 [inline]
 dump_stack_lvl+0x116/0x1f0 lib/dump_stack.c:120
 print_bad_irq_dependency kernel/locking/lockdep.c:2616 [inline]
 check_irq_usage+0x7dc/0x920 kernel/locking/lockdep.c:2857
 check_prev_add kernel/locking/lockdep.c:3169 [inline]
 check_prevs_add kernel/locking/lockdep.c:3284 [inline]
 validate_chain kernel/locking/lockdep.c:3908 [inline]
 __lock_acquire+0x12bc/0x1ce0 kernel/locking/lockdep.c:5237
 lock_acquire kernel/locking/lockdep.c:5868 [inline]
 lock_acquire+0x179/0x350 kernel/locking/lockdep.c:5825
 __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+0x74b/0x880 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+0x1e8/0x3b0 drivers/input/input.c:423
 evdev_write+0x457/0x750 drivers/input/evdev.c:528
 vfs_write+0x29d/0x11d0 fs/read_write.c:684
 ksys_write+0x1f8/0x250 fs/read_write.c:738
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0xcd/0x4c0 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f8f9dd8ebe9
Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 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 a8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f8f9ecae038 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 00007f8f9dfc5fa0 RCX: 00007f8f9dd8ebe9
RDX: 0000000000001068 RSI: 0000200000000040 RDI: 0000000000000004
RBP: 00007f8f9de11e19 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f8f9dfc6038 R14: 00007f8f9dfc5fa0 R15: 00007ffe5e65c208
 </TASK>