=====================================================
WARNING: SOFTIRQ-safe -> SOFTIRQ-unsafe lock order detected
syzkaller #0 Tainted: G             L     
-----------------------------------------------------
syz.3.4730/23946 [HC0[0]:SC0[0]:HE0:SE1] is trying to acquire:
ffff8880255fd600 (&new->fa_lock){...-}-{3:3}, at: kill_fasync_rcu fs/fcntl.c:1135 [inline]
ffff8880255fd600 (&new->fa_lock){...-}-{3:3}, at: kill_fasync+0x199/0x4d0 fs/fcntl.c:1159

and this task is already holding:
ffff88802a4c6028 (&client->buffer_lock){....}-{3:3}, at: spin_lock include/linux/spinlock.h:342 [inline]
ffff88802a4c6028 (&client->buffer_lock){....}-{3:3}, at: evdev_pass_values+0xcb/0xc00 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:
 (&dev->event_lock#2){..-.}-{3:3}

... which became SOFTIRQ-irq-safe at:
  lock_acquire+0x106/0x350 kernel/locking/lockdep.c:5868
  __raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:132 [inline]
  _raw_spin_lock_irqsave+0x40/0x60 kernel/locking/spinlock.c:166
  class_spinlock_irqsave_constructor include/linux/spinlock.h:620 [inline]
  input_inject_event+0xa4/0x330 drivers/input/input.c:419
  led_trigger_event+0x138/0x210 drivers/leds/led-triggers.c:420
  kbd_propagate_led_state drivers/tty/vt/keyboard.c:1118 [inline]
  kbd_bh+0x1c6/0x2e0 drivers/tty/vt/keyboard.c:1297
  tasklet_action_common+0x2da/0x4a0 kernel/softirq.c:938
  handle_softirqs+0x225/0x840 kernel/softirq.c:622
  __do_softirq kernel/softirq.c:656 [inline]
  invoke_softirq kernel/softirq.c:496 [inline]
  __irq_exit_rcu+0xca/0x220 kernel/softirq.c:735
  irq_exit_rcu+0x9/0x30 kernel/softirq.c:752
  instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1061 [inline]
  sysvec_apic_timer_interrupt+0xa6/0xc0 arch/x86/kernel/apic/apic.c:1061
  asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:697
  __raw_spin_unlock_irq include/linux/spinlock_api_smp.h:188 [inline]
  _raw_spin_unlock_irq+0x29/0x50 kernel/locking/spinlock.c:206
  spin_unlock_irq include/linux/spinlock.h:402 [inline]
  n_tty_ioctl_helper+0x38a/0x4d0 drivers/tty/tty_ioctl.c:-1
  tty_ioctl+0x9bd/0xdd0 drivers/tty/tty_io.c:2801
  vfs_ioctl fs/ioctl.c:51 [inline]
  __do_sys_ioctl fs/ioctl.c:597 [inline]
  __se_sys_ioctl+0xfc/0x170 fs/ioctl.c:583
  do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
  do_syscall_64+0x174/0x580 arch/x86/entry/syscall_64.c:94
  entry_SYSCALL_64_after_hwframe+0x77/0x7f

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

... which became SOFTIRQ-irq-unsafe at:
...
  lock_acquire+0x106/0x350 kernel/locking/lockdep.c:5868
  __raw_read_lock include/linux/rwlock_api_smp.h:163 [inline]
  _raw_read_lock+0x36/0x50 kernel/locking/spinlock.c:232
  __do_wait+0xd9/0x720 kernel/exit.c:1679
  do_wait+0x1e7/0x510 kernel/exit.c:1723
  kernel_wait+0xd6/0x1c0 kernel/exit.c:1899
  call_usermodehelper_exec_sync kernel/umh.c:136 [inline]
  call_usermodehelper_exec_work+0xbe/0x230 kernel/umh.c:163
  process_one_work kernel/workqueue.c:3314 [inline]
  process_scheduled_works+0xa8e/0x14e0 kernel/workqueue.c:3397
  worker_thread+0xa47/0xfb0 kernel/workqueue.c:3478
  kthread+0x389/0x470 kernel/kthread.c:436
  ret_from_fork+0x514/0xb70 arch/x86/kernel/process.c:158
  ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245

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);
  <Interrupt>
    lock(&dev->event_lock#2);

 *** DEADLOCK ***

7 locks held by syz.3.4730/23946:
 #0: ffff88802c1ed110 (&evdev->mutex){+.+.}-{4:4}, at: evdev_write+0x1ae/0x4c0 drivers/input/evdev.c:511
 #1: ffff88801ffd2230 (&dev->event_lock#2){..-.}-{3:3}, at: class_spinlock_irqsave_constructor include/linux/spinlock.h:620 [inline]
 #1: ffff88801ffd2230 (&dev->event_lock#2){..-.}-{3:3}, at: input_inject_event+0xa4/0x330 drivers/input/input.c:419
 #2: ffffffff8e95c780 (rcu_read_lock){....}-{1:3}, at: rcu_lock_acquire include/linux/rcupdate.h:300 [inline]
 #2: ffffffff8e95c780 (rcu_read_lock){....}-{1:3}, at: rcu_read_lock include/linux/rcupdate.h:838 [inline]
 #2: ffffffff8e95c780 (rcu_read_lock){....}-{1:3}, at: class_rcu_constructor include/linux/rcupdate.h:1181 [inline]
 #2: ffffffff8e95c780 (rcu_read_lock){....}-{1:3}, at: input_inject_event+0xb5/0x330 drivers/input/input.c:420
 #3: ffffffff8e95c780 (rcu_read_lock){....}-{1:3}, at: rcu_lock_acquire include/linux/rcupdate.h:300 [inline]
 #3: ffffffff8e95c780 (rcu_read_lock){....}-{1:3}, at: rcu_read_lock include/linux/rcupdate.h:838 [inline]
 #3: ffffffff8e95c780 (rcu_read_lock){....}-{1:3}, at: class_rcu_constructor include/linux/rcupdate.h:1181 [inline]
 #3: ffffffff8e95c780 (rcu_read_lock){....}-{1:3}, at: input_pass_values+0x8d/0x890 drivers/input/input.c:119
 #4: ffffffff8e95c780 (rcu_read_lock){....}-{1:3}, at: rcu_lock_acquire include/linux/rcupdate.h:300 [inline]
 #4: ffffffff8e95c780 (rcu_read_lock){....}-{1:3}, at: rcu_read_lock include/linux/rcupdate.h:838 [inline]
 #4: ffffffff8e95c780 (rcu_read_lock){....}-{1:3}, at: evdev_events+0x79/0x340 drivers/input/evdev.c:298
 #5: ffff88802a4c6028 (&client->buffer_lock){....}-{3:3}, at: spin_lock include/linux/spinlock.h:342 [inline]
 #5: ffff88802a4c6028 (&client->buffer_lock){....}-{3:3}, at: evdev_pass_values+0xcb/0xc00 drivers/input/evdev.c:261
 #6: ffffffff8e95c780 (rcu_read_lock){....}-{1:3}, at: rcu_lock_acquire include/linux/rcupdate.h:300 [inline]
 #6: ffffffff8e95c780 (rcu_read_lock){....}-{1:3}, at: rcu_read_lock include/linux/rcupdate.h:838 [inline]
 #6: ffffffff8e95c780 (rcu_read_lock){....}-{1:3}, at: kill_fasync+0x53/0x4d0 fs/fcntl.c:1158

the dependencies between SOFTIRQ-irq-safe lock and the holding lock:
 -> (&dev->event_lock#2){..-.}-{3:3} {
    IN-SOFTIRQ-W at:
                      lock_acquire+0x106/0x350 kernel/locking/lockdep.c:5868
                      __raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:132 [inline]
                      _raw_spin_lock_irqsave+0x40/0x60 kernel/locking/spinlock.c:166
                      class_spinlock_irqsave_constructor include/linux/spinlock.h:620 [inline]
                      input_inject_event+0xa4/0x330 drivers/input/input.c:419
                      led_trigger_event+0x138/0x210 drivers/leds/led-triggers.c:420
                      kbd_propagate_led_state drivers/tty/vt/keyboard.c:1118 [inline]
                      kbd_bh+0x1c6/0x2e0 drivers/tty/vt/keyboard.c:1297
                      tasklet_action_common+0x2da/0x4a0 kernel/softirq.c:938
                      handle_softirqs+0x225/0x840 kernel/softirq.c:622
                      __do_softirq kernel/softirq.c:656 [inline]
                      invoke_softirq kernel/softirq.c:496 [inline]
                      __irq_exit_rcu+0xca/0x220 kernel/softirq.c:735
                      irq_exit_rcu+0x9/0x30 kernel/softirq.c:752
                      instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1061 [inline]
                      sysvec_apic_timer_interrupt+0xa6/0xc0 arch/x86/kernel/apic/apic.c:1061
                      asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:697
                      __raw_spin_unlock_irq include/linux/spinlock_api_smp.h:188 [inline]
                      _raw_spin_unlock_irq+0x29/0x50 kernel/locking/spinlock.c:206
                      spin_unlock_irq include/linux/spinlock.h:402 [inline]
                      n_tty_ioctl_helper+0x38a/0x4d0 drivers/tty/tty_ioctl.c:-1
                      tty_ioctl+0x9bd/0xdd0 drivers/tty/tty_io.c:2801
                      vfs_ioctl fs/ioctl.c:51 [inline]
                      __do_sys_ioctl fs/ioctl.c:597 [inline]
                      __se_sys_ioctl+0xfc/0x170 fs/ioctl.c:583
                      do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
                      do_syscall_64+0x174/0x580 arch/x86/entry/syscall_64.c:94
                      entry_SYSCALL_64_after_hwframe+0x77/0x7f
    INITIAL USE at:
                     lock_acquire+0x106/0x350 kernel/locking/lockdep.c:5868
                     __raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:132 [inline]
                     _raw_spin_lock_irqsave+0x40/0x60 kernel/locking/spinlock.c:166
                     class_spinlock_irqsave_constructor include/linux/spinlock.h:620 [inline]
                     input_inject_event+0xa4/0x330 drivers/input/input.c:419
                     kbd_led_trigger_activate+0xbc/0x100 drivers/tty/vt/keyboard.c:1074
                     led_trigger_set+0x525/0x940 drivers/leds/led-triggers.c:220
                     led_match_default_trigger drivers/leds/led-triggers.c:277 [inline]
                     led_trigger_set_default+0x263/0x2a0 drivers/leds/led-triggers.c:300
                     led_classdev_register_ext+0x761/0x9a0 drivers/leds/led-class.c:581
                     led_classdev_register include/linux/leds.h:274 [inline]
                     input_leds_connect+0x4de/0x750 drivers/input/input-leds.c:145
                     input_attach_handler drivers/input/input.c:1011 [inline]
                     input_register_device+0xd12/0x1150 drivers/input/input.c:2395
                     atkbd_connect+0x6fa/0x9f0 drivers/input/keyboard/atkbd.c:1323
                     serio_connect_driver drivers/input/serio/serio.c:44 [inline]
                     serio_driver_probe+0x82/0xb0 drivers/input/serio/serio.c:748
                     call_driver_probe drivers/base/dd.c:-1 [inline]
                     really_probe+0x254/0xae0 drivers/base/dd.c:709
                     __driver_probe_device+0x1f5/0x380 drivers/base/dd.c:871
                     driver_probe_device+0x4f/0x240 drivers/base/dd.c:901
                     __driver_attach+0x342/0x620 drivers/base/dd.c:1295
                     bus_for_each_dev+0x23b/0x2c0 drivers/base/bus.c:383
                     serio_attach_driver drivers/input/serio/serio.c:777 [inline]
                     serio_handle_event+0x1af/0xfc0 drivers/input/serio/serio.c:214
                     process_one_work kernel/workqueue.c:3314 [inline]
                     process_scheduled_works+0xa8e/0x14e0 kernel/workqueue.c:3397
                     worker_thread+0xa47/0xfb0 kernel/workqueue.c:3478
                     kthread+0x389/0x470 kernel/kthread.c:436
                     ret_from_fork+0x514/0xb70 arch/x86/kernel/process.c:158
                     ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
  }
  ... key      at: [<ffffffff9a7b15a0>] input_allocate_device.__key.7+0x0/0x20
-> (&client->buffer_lock){....}-{3:3} {
   INITIAL USE at:
                   lock_acquire+0x106/0x350 kernel/locking/lockdep.c:5868
                   __raw_spin_lock include/linux/spinlock_api_smp.h:158 [inline]
                   _raw_spin_lock+0x2e/0x40 kernel/locking/spinlock.c:158
                   spin_lock include/linux/spinlock.h:342 [inline]
                   evdev_pass_values+0xcb/0xc00 drivers/input/evdev.c:261
                   evdev_events+0x1e6/0x340 drivers/input/evdev.c:306
                   input_pass_values+0x288/0x890 drivers/input/input.c:128
                   input_event_dispose+0x330/0x6b0 drivers/input/input.c:342
                   input_inject_event+0x1dd/0x330 drivers/input/input.c:424
                   evdev_write+0x325/0x4c0 drivers/input/evdev.c:528
                   vfs_write+0x296/0xba0 fs/read_write.c:686
                   ksys_write+0x150/0x270 fs/read_write.c:740
                   do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
                   do_syscall_64+0x174/0x580 arch/x86/entry/syscall_64.c:94
                   entry_SYSCALL_64_after_hwframe+0x77/0x7f
 }
 ... key      at: [<ffffffff9a7b1840>] evdev_open.__key.27+0x0/0x20
 ... acquired at:
   __raw_spin_lock include/linux/spinlock_api_smp.h:158 [inline]
   _raw_spin_lock+0x2e/0x40 kernel/locking/spinlock.c:158
   spin_lock include/linux/spinlock.h:342 [inline]
   evdev_pass_values+0xcb/0xc00 drivers/input/evdev.c:261
   evdev_events+0x1e6/0x340 drivers/input/evdev.c:306
   input_pass_values+0x288/0x890 drivers/input/input.c:128
   input_event_dispose+0x330/0x6b0 drivers/input/input.c:342
   input_inject_event+0x1dd/0x330 drivers/input/input.c:424
   evdev_write+0x325/0x4c0 drivers/input/evdev.c:528
   vfs_write+0x296/0xba0 fs/read_write.c:686
   ksys_write+0x150/0x270 fs/read_write.c:740
   do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
   do_syscall_64+0x174/0x580 arch/x86/entry/syscall_64.c:94
   entry_SYSCALL_64_after_hwframe+0x77/0x7f


the dependencies between the lock to be acquired
 and SOFTIRQ-irq-unsafe lock:
  -> (tasklist_lock){.+.+}-{3:3} {
     HARDIRQ-ON-R at:
                        lock_acquire+0x106/0x350 kernel/locking/lockdep.c:5868
                        __raw_read_lock include/linux/rwlock_api_smp.h:163 [inline]
                        _raw_read_lock+0x36/0x50 kernel/locking/spinlock.c:232
                        __do_wait+0xd9/0x720 kernel/exit.c:1679
                        do_wait+0x1e7/0x510 kernel/exit.c:1723
                        kernel_wait+0xd6/0x1c0 kernel/exit.c:1899
                        call_usermodehelper_exec_sync kernel/umh.c:136 [inline]
                        call_usermodehelper_exec_work+0xbe/0x230 kernel/umh.c:163
                        process_one_work kernel/workqueue.c:3314 [inline]
                        process_scheduled_works+0xa8e/0x14e0 kernel/workqueue.c:3397
                        worker_thread+0xa47/0xfb0 kernel/workqueue.c:3478
                        kthread+0x389/0x470 kernel/kthread.c:436
                        ret_from_fork+0x514/0xb70 arch/x86/kernel/process.c:158
                        ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
     SOFTIRQ-ON-R at:
                        lock_acquire+0x106/0x350 kernel/locking/lockdep.c:5868
                        __raw_read_lock include/linux/rwlock_api_smp.h:163 [inline]
                        _raw_read_lock+0x36/0x50 kernel/locking/spinlock.c:232
                        __do_wait+0xd9/0x720 kernel/exit.c:1679
                        do_wait+0x1e7/0x510 kernel/exit.c:1723
                        kernel_wait+0xd6/0x1c0 kernel/exit.c:1899
                        call_usermodehelper_exec_sync kernel/umh.c:136 [inline]
                        call_usermodehelper_exec_work+0xbe/0x230 kernel/umh.c:163
                        process_one_work kernel/workqueue.c:3314 [inline]
                        process_scheduled_works+0xa8e/0x14e0 kernel/workqueue.c:3397
                        worker_thread+0xa47/0xfb0 kernel/workqueue.c:3478
                        kthread+0x389/0x470 kernel/kthread.c:436
                        ret_from_fork+0x514/0xb70 arch/x86/kernel/process.c:158
                        ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
     INITIAL USE at:
                       lock_acquire+0x106/0x350 kernel/locking/lockdep.c:5868
                       __raw_write_lock_irq include/linux/rwlock_api_smp.h:213 [inline]
                       _raw_write_lock_irq+0x3d/0x50 kernel/locking/spinlock.c:330
                       copy_process+0x29eb/0x4380 kernel/fork.c:2411
                       kernel_clone+0x2d7/0x940 kernel/fork.c:2722
                       user_mode_thread+0x110/0x180 kernel/fork.c:2798
                       rest_init+0x23/0x300 init/main.c:727
                       start_kernel+0x38a/0x3e0 init/main.c:1220
                       x86_64_start_reservations+0x24/0x30 arch/x86/kernel/head64.c:310
                       x86_64_start_kernel+0x137/0x1b0 arch/x86/kernel/head64.c:291
                       common_startup_64+0x13e/0x147
     INITIAL READ USE at:
                            lock_acquire+0x106/0x350 kernel/locking/lockdep.c:5868
                            __raw_read_lock include/linux/rwlock_api_smp.h:163 [inline]
                            _raw_read_lock+0x36/0x50 kernel/locking/spinlock.c:232
                            __do_wait+0xd9/0x720 kernel/exit.c:1679
                            do_wait+0x1e7/0x510 kernel/exit.c:1723
                            kernel_wait+0xd6/0x1c0 kernel/exit.c:1899
                            call_usermodehelper_exec_sync kernel/umh.c:136 [inline]
                            call_usermodehelper_exec_work+0xbe/0x230 kernel/umh.c:163
                            process_one_work kernel/workqueue.c:3314 [inline]
                            process_scheduled_works+0xa8e/0x14e0 kernel/workqueue.c:3397
                            worker_thread+0xa47/0xfb0 kernel/workqueue.c:3478
                            kthread+0x389/0x470 kernel/kthread.c:436
                            ret_from_fork+0x514/0xb70 arch/x86/kernel/process.c:158
                            ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
   }
   ... key      at: [<ffffffff8e60a058>] tasklist_lock+0x18/0x40
   ... acquired at:
   __raw_read_lock include/linux/rwlock_api_smp.h:163 [inline]
   _raw_read_lock+0x36/0x50 kernel/locking/spinlock.c:232
   send_sigurg+0x12b/0x420 fs/fcntl.c:978
   sk_send_sigurg+0x6c/0x2e0 net/core/sock.c:3681
   queue_oob+0x42c/0x4f0 net/unix/af_unix.c:2368
   unix_stream_sendmsg+0xc30/0xde0 net/unix/af_unix.c:2502
   sock_sendmsg_nosec net/socket.c:787 [inline]
   __sock_sendmsg net/socket.c:802 [inline]
   ____sys_sendmsg+0x9b9/0xa20 net/socket.c:2699
   ___sys_sendmsg+0x2a5/0x360 net/socket.c:2753
   __sys_sendmmsg+0x27c/0x4e0 net/socket.c:2842
   __do_sys_sendmmsg net/socket.c:2869 [inline]
   __se_sys_sendmmsg net/socket.c:2866 [inline]
   __x64_sys_sendmmsg+0xa0/0xc0 net/socket.c:2866
   do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
   do_syscall_64+0x174/0x580 arch/x86/entry/syscall_64.c:94
   entry_SYSCALL_64_after_hwframe+0x77/0x7f

 -> (&f_owner->lock){....}-{3:3} {
    INITIAL USE at:
                     lock_acquire+0x106/0x350 kernel/locking/lockdep.c:5868
                     __raw_write_lock_irq include/linux/rwlock_api_smp.h:213 [inline]
                     _raw_write_lock_irq+0x3d/0x50 kernel/locking/spinlock.c:330
                     __f_setown+0x5f/0x380 fs/fcntl.c:136
                     f_setown+0x23a/0x300 fs/fcntl.c:183
                     sock_ioctl+0x5c3/0x7e0 net/socket.c:1376
                     vfs_ioctl fs/ioctl.c:51 [inline]
                     __do_sys_ioctl fs/ioctl.c:597 [inline]
                     __se_sys_ioctl+0xfc/0x170 fs/ioctl.c:583
                     do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
                     do_syscall_64+0x174/0x580 arch/x86/entry/syscall_64.c:94
                     entry_SYSCALL_64_after_hwframe+0x77/0x7f
    INITIAL READ USE at:
                          lock_acquire+0x106/0x350 kernel/locking/lockdep.c:5868
                          __raw_read_lock_irqsave include/linux/rwlock_api_smp.h:174 [inline]
                          _raw_read_lock_irqsave+0x48/0x60 kernel/locking/spinlock.c:240
                          send_sigurg+0x55/0x420 fs/fcntl.c:962
                          sk_send_sigurg+0x6c/0x2e0 net/core/sock.c:3681
                          queue_oob+0x42c/0x4f0 net/unix/af_unix.c:2368
                          unix_stream_sendmsg+0xc30/0xde0 net/unix/af_unix.c:2502
                          sock_sendmsg_nosec net/socket.c:787 [inline]
                          __sock_sendmsg net/socket.c:802 [inline]
                          ____sys_sendmsg+0x9b9/0xa20 net/socket.c:2699
                          ___sys_sendmsg+0x2a5/0x360 net/socket.c:2753
                          __sys_sendmmsg+0x27c/0x4e0 net/socket.c:2842
                          __do_sys_sendmmsg net/socket.c:2869 [inline]
                          __se_sys_sendmmsg net/socket.c:2866 [inline]
                          __x64_sys_sendmmsg+0xa0/0xc0 net/socket.c:2866
                          do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
                          do_syscall_64+0x174/0x580 arch/x86/entry/syscall_64.c:94
                          entry_SYSCALL_64_after_hwframe+0x77/0x7f
  }
  ... key      at: [<ffffffff9a493880>] file_f_owner_allocate.__key+0x0/0x20
  ... acquired at:
   __raw_read_lock_irqsave include/linux/rwlock_api_smp.h:174 [inline]
   _raw_read_lock_irqsave+0x48/0x60 kernel/locking/spinlock.c:240
   send_sigio+0x38/0x370 fs/fcntl.c:918
   kill_fasync_rcu fs/fcntl.c:1144 [inline]
   kill_fasync+0x24d/0x4d0 fs/fcntl.c:1159
   sock_wake_async+0x132/0x150 net/socket.c:-1
   sk_wake_async_rcu include/net/sock.h:2594 [inline]
   sock_def_readable+0x3c1/0x550 net/core/sock.c:3625
   queue_oob+0x45e/0x4f0 net/unix/af_unix.c:2370
   unix_stream_sendmsg+0xc30/0xde0 net/unix/af_unix.c:2502
   sock_sendmsg_nosec net/socket.c:787 [inline]
   __sock_sendmsg net/socket.c:802 [inline]
   ____sys_sendmsg+0x9b9/0xa20 net/socket.c:2699
   ___sys_sendmsg+0x2a5/0x360 net/socket.c:2753
   __sys_sendmmsg+0x27c/0x4e0 net/socket.c:2842
   __do_sys_sendmmsg net/socket.c:2869 [inline]
   __se_sys_sendmmsg net/socket.c:2866 [inline]
   __x64_sys_sendmmsg+0xa0/0xc0 net/socket.c:2866
   do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
   do_syscall_64+0x174/0x580 arch/x86/entry/syscall_64.c:94
   entry_SYSCALL_64_after_hwframe+0x77/0x7f

-> (&new->fa_lock){...-}-{3:3} {
   IN-SOFTIRQ-R at:
                    lock_acquire+0x106/0x350 kernel/locking/lockdep.c:5868
                    __raw_read_lock_irqsave include/linux/rwlock_api_smp.h:174 [inline]
                    _raw_read_lock_irqsave+0x48/0x60 kernel/locking/spinlock.c:240
                    kill_fasync_rcu fs/fcntl.c:1135 [inline]
                    kill_fasync+0x199/0x4d0 fs/fcntl.c:1159
                    sock_wake_async+0x132/0x150 net/socket.c:-1
                    sk_wake_async_rcu include/net/sock.h:2594 [inline]
                    sock_def_error_report+0x332/0x390 net/core/sock.c:3610
                    sk_error_report+0x48/0x280 net/core/sock.c:348
                    sock_queue_err_skb+0x508/0x6a0 net/core/skbuff.c:5489
                    ip_icmp_error+0x4fd/0x920 net/ipv4/ip_sockglue.c:438
                    tcp_v4_err+0xb4f/0x13f0 net/ipv4/tcp_ipv4.c:619
                    icmp_unreach+0x523/0x920 net/ipv4/icmp.c:1202
                    icmp_rcv+0xd33/0x1290 net/ipv4/icmp.c:1531
                    ip_protocol_deliver_rcu+0x2dc/0x440 net/ipv4/ip_input.c:207
                    ip_local_deliver_finish+0x3bb/0x6f0 net/ipv4/ip_input.c:241
                    NF_HOOK+0x336/0x3c0 include/linux/netfilter.h:318
                    NF_HOOK+0x336/0x3c0 include/linux/netfilter.h:318
                    __netif_receive_skb_one_core net/core/dev.c:6202 [inline]
                    __netif_receive_skb net/core/dev.c:6315 [inline]
                    process_backlog+0xa34/0x1860 net/core/dev.c:6666
                    __napi_poll+0xaa/0x330 net/core/dev.c:7733
                    napi_poll net/core/dev.c:7796 [inline]
                    net_rx_action+0x61d/0xf50 net/core/dev.c:7953
                    handle_softirqs+0x225/0x840 kernel/softirq.c:622
                    do_softirq+0x76/0xd0 kernel/softirq.c:523
                    __local_bh_enable_ip+0xf8/0x130 kernel/softirq.c:450
                    local_bh_enable include/linux/bottom_half.h:33 [inline]
                    __icmp_send+0x1074/0x1710 net/ipv4/icmp.c:1012
                    icmp_send include/net/icmp.h:43 [inline]
                    ip_vs_leave+0x467/0xca0 net/netfilter/ipvs/ip_vs_core.c:846
                    tcp_conn_schedule+0x50c/0x870 net/netfilter/ipvs/ip_vs_proto_tcp.c:93
                    ip_vs_try_to_schedule net/netfilter/ipvs/ip_vs_core.c:1657 [inline]
                    ip_vs_in_hook+0xcaf/0x1c70 net/netfilter/ipvs/ip_vs_core.c:2229
                    nf_hook_entry_hookfn include/linux/netfilter.h:158 [inline]
                    nf_hook_slow+0xc5/0x220 net/netfilter/core.c:619
                    nf_hook+0x22a/0x3a0 include/linux/netfilter.h:273
                    __ip_local_out+0x558/0x6a0 net/ipv4/ip_output.c:120
                    ip_local_out+0x2a/0x190 net/ipv4/ip_output.c:129
                    __ip_queue_xmit+0x10df/0x1b10 net/ipv4/ip_output.c:534
                    __tcp_transmit_skb+0x2d18/0x47c0 net/ipv4/tcp_output.c:1716
                    tcp_transmit_skb net/ipv4/tcp_output.c:1733 [inline]
                    tcp_send_syn_data net/ipv4/tcp_output.c:4284 [inline]
                    tcp_connect+0x3486/0x53c0 net/ipv4/tcp_output.c:4373
                    tcp_v4_connect+0x1051/0x1950 net/ipv4/tcp_ipv4.c:345
                    __inet_stream_connect+0x258/0xe00 net/ipv4/af_inet.c:684
                    tcp_sendmsg_fastopen+0x3af/0x5f0 net/ipv4/tcp.c:1086
                    tcp_sendmsg_locked+0x4cdc/0x55c0 net/ipv4/tcp.c:1182
                    tcp_sendmsg+0x2f/0x50 net/ipv4/tcp.c:1452
                    sock_sendmsg_nosec net/socket.c:788 [inline]
                    __sock_sendmsg net/socket.c:802 [inline]
                    ____sys_sendmsg+0x853/0xa20 net/socket.c:2699
                    ___sys_sendmsg+0x2a5/0x360 net/socket.c:2753
                    __sys_sendmsg net/socket.c:2785 [inline]
                    __do_sys_sendmsg net/socket.c:2790 [inline]
                    __se_sys_sendmsg net/socket.c:2788 [inline]
                    __x64_sys_sendmsg+0x1bd/0x2a0 net/socket.c:2788
                    do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
                    do_syscall_64+0x174/0x580 arch/x86/entry/syscall_64.c:94
                    entry_SYSCALL_64_after_hwframe+0x77/0x7f
   INITIAL USE at:
                   lock_acquire+0x106/0x350 kernel/locking/lockdep.c:5868
                   __raw_write_lock_irq include/linux/rwlock_api_smp.h:213 [inline]
                   _raw_write_lock_irq+0x3d/0x50 kernel/locking/spinlock.c:330
                   fasync_remove_entry+0xf1/0x1c0 fs/fcntl.c:1012
                   sock_fasync+0x85/0xf0 net/socket.c:1540
                   __fput+0x88d/0xa50 fs/file_table.c:507
                   task_work_run+0x1d9/0x270 kernel/task_work.c:233
                   exit_task_work include/linux/task_work.h:40 [inline]
                   do_exit+0x73a/0x2360 kernel/exit.c:976
                   do_group_exit+0x22d/0x2f0 kernel/exit.c:1119
                   get_signal+0x121b/0x12c0 kernel/signal.c:3038
                   arch_do_signal_or_restart+0xbb/0x860 arch/x86/kernel/signal.c:337
                   __exit_to_user_mode_loop kernel/entry/common.c:64 [inline]
                   exit_to_user_mode_loop kernel/entry/common.c:98 [inline]
                   __exit_to_user_mode_prepare include/linux/irq-entry-common.h:207 [inline]
                   irqentry_exit_to_user_mode_prepare include/linux/irq-entry-common.h:244 [inline]
                   irqentry_exit_to_user_mode include/linux/irq-entry-common.h:315 [inline]
                   irqentry_exit+0x2aa/0x8e0 kernel/entry/common.c:162
                   asm_exc_page_fault+0x26/0x30 arch/x86/include/asm/idtentry.h:618
   INITIAL READ USE at:
                        lock_acquire+0x106/0x350 kernel/locking/lockdep.c:5868
                        __raw_read_lock_irqsave include/linux/rwlock_api_smp.h:174 [inline]
                        _raw_read_lock_irqsave+0x48/0x60 kernel/locking/spinlock.c:240
                        kill_fasync_rcu fs/fcntl.c:1135 [inline]
                        kill_fasync+0x199/0x4d0 fs/fcntl.c:1159
                        sock_wake_async+0x132/0x150 net/socket.c:-1
                        sk_wake_async include/net/sock.h:2586 [inline]
                        sk_send_sigurg+0x1f1/0x2e0 net/core/sock.c:3682
                        queue_oob+0x42c/0x4f0 net/unix/af_unix.c:2368
                        unix_stream_sendmsg+0xc30/0xde0 net/unix/af_unix.c:2502
                        sock_sendmsg_nosec net/socket.c:787 [inline]
                        __sock_sendmsg net/socket.c:802 [inline]
                        ____sys_sendmsg+0x9b9/0xa20 net/socket.c:2699
                        ___sys_sendmsg+0x2a5/0x360 net/socket.c:2753
                        __sys_sendmmsg+0x27c/0x4e0 net/socket.c:2842
                        __do_sys_sendmmsg net/socket.c:2869 [inline]
                        __se_sys_sendmmsg net/socket.c:2866 [inline]
                        __x64_sys_sendmmsg+0xa0/0xc0 net/socket.c:2866
                        do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
                        do_syscall_64+0x174/0x580 arch/x86/entry/syscall_64.c:94
                        entry_SYSCALL_64_after_hwframe+0x77/0x7f
 }
 ... key      at: [<ffffffff9a4938a0>] fasync_insert_entry.__key+0x0/0x20
 ... acquired at:
   __raw_read_lock_irqsave include/linux/rwlock_api_smp.h:174 [inline]
   _raw_read_lock_irqsave+0x48/0x60 kernel/locking/spinlock.c:240
   kill_fasync_rcu fs/fcntl.c:1135 [inline]
   kill_fasync+0x199/0x4d0 fs/fcntl.c:1159
   __pass_event drivers/input/evdev.c:240 [inline]
   evdev_pass_values+0x552/0xc00 drivers/input/evdev.c:278
   evdev_events+0x1e6/0x340 drivers/input/evdev.c:306
   input_pass_values+0x288/0x890 drivers/input/input.c:128
   input_event_dispose+0x330/0x6b0 drivers/input/input.c:342
   input_inject_event+0x1dd/0x330 drivers/input/input.c:424
   evdev_write+0x325/0x4c0 drivers/input/evdev.c:528
   vfs_write+0x296/0xba0 fs/read_write.c:686
   ksys_write+0x150/0x270 fs/read_write.c:740
   do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
   do_syscall_64+0x174/0x580 arch/x86/entry/syscall_64.c:94
   entry_SYSCALL_64_after_hwframe+0x77/0x7f


stack backtrace:
CPU: 0 UID: 0 PID: 23946 Comm: syz.3.4730 Tainted: G             L      syzkaller #0 PREEMPT(full) 
Tainted: [L]=SOFTLOCKUP
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/09/2026
Call Trace:
 <TASK>
 dump_stack_lvl+0xe8/0x150 lib/dump_stack.c:120
 print_bad_irq_dependency kernel/locking/lockdep.c:2616 [inline]
 check_irq_usage kernel/locking/lockdep.c:2857 [inline]
 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+0x2a37/0x2cd0 kernel/locking/lockdep.c:5237
 lock_acquire+0x106/0x350 kernel/locking/lockdep.c:5868
 __raw_read_lock_irqsave include/linux/rwlock_api_smp.h:174 [inline]
 _raw_read_lock_irqsave+0x48/0x60 kernel/locking/spinlock.c:240
 kill_fasync_rcu fs/fcntl.c:1135 [inline]
 kill_fasync+0x199/0x4d0 fs/fcntl.c:1159
 __pass_event drivers/input/evdev.c:240 [inline]
 evdev_pass_values+0x552/0xc00 drivers/input/evdev.c:278
 evdev_events+0x1e6/0x340 drivers/input/evdev.c:306
 input_pass_values+0x288/0x890 drivers/input/input.c:128
 input_event_dispose+0x330/0x6b0 drivers/input/input.c:342
 input_inject_event+0x1dd/0x330 drivers/input/input.c:424
 evdev_write+0x325/0x4c0 drivers/input/evdev.c:528
 vfs_write+0x296/0xba0 fs/read_write.c:686
 ksys_write+0x150/0x270 fs/read_write.c:740
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0x174/0x580 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fd65039ce59
Code: ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 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 e8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007fd65125a028 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 00007fd650616090 RCX: 00007fd65039ce59
RDX: 0000000000000037 RSI: 0000200000000040 RDI: 0000000000000006
RBP: 00007fd650432d6f R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007fd650616128 R14: 00007fd650616090 R15: 00007fd65073fa48
 </TASK>