syzbot

=====================================================
WARNING: SOFTIRQ-safe -> SOFTIRQ-unsafe lock order detected
6.12.0-rc1-syzkaller-00125-g0c559323bbaa #0 Not tainted
-----------------------------------------------------
syz.1.3226/14892 [HC0[0]:SC0[0]:HE0:SE1] is trying to acquire:
ffff88802d5693a0 (&f_owner->lock){....}-{2:2}, at: send_sigio+0x31/0x3e0 fs/fcntl.c:910

and this task is already holding:
ffff8880290a9948 (&new->fa_lock){....}-{2:2}, at: kill_fasync_rcu fs/fcntl.c:1127 [inline]
ffff8880290a9948 (&new->fa_lock){....}-{2:2}, at: kill_fasync fs/fcntl.c:1151 [inline]
ffff8880290a9948 (&new->fa_lock){....}-{2:2}, at: kill_fasync+0x138/0x520 fs/fcntl.c:1144
which would create a new lock dependency:
 (&new->fa_lock){....}-{2:2} -> (&f_owner->lock){....}-{2:2}

but this new dependency connects a SOFTIRQ-irq-safe lock:
 (&dev->event_lock#2){..-.}-{2:2}

... which became SOFTIRQ-irq-safe at:
  lock_acquire.part.0+0x11b/0x380 kernel/locking/lockdep.c:5825
  __raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:110 [inline]
  _raw_spin_lock_irqsave+0x3a/0x60 kernel/locking/spinlock.c:162
  input_inject_event+0xa4/0x370 drivers/input/input.c:423
  kd_sound_helper+0x17a/0x280 drivers/tty/vt/keyboard.c:256
  input_handler_for_each_handle+0xd4/0x250 drivers/input/input.c:2676
  call_timer_fn+0x1a0/0x610 kernel/time/timer.c:1794
  expire_timers kernel/time/timer.c:1845 [inline]
  __run_timers+0x6e8/0x930 kernel/time/timer.c:2419
  __run_timer_base kernel/time/timer.c:2430 [inline]
  __run_timer_base kernel/time/timer.c:2423 [inline]
  run_timer_base+0x111/0x190 kernel/time/timer.c:2439
  run_timer_softirq+0x1a/0x40 kernel/time/timer.c:2449
  handle_softirqs+0x213/0x8f0 kernel/softirq.c:554
  __do_softirq kernel/softirq.c:588 [inline]
  invoke_softirq kernel/softirq.c:428 [inline]
  __irq_exit_rcu kernel/softirq.c:637 [inline]
  irq_exit_rcu+0xbb/0x120 kernel/softirq.c:649
  instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1037 [inline]
  sysvec_apic_timer_interrupt+0xa4/0xc0 arch/x86/kernel/apic/apic.c:1037
  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:106 [inline]
  acpi_safe_halt+0x1a/0x20 drivers/acpi/processor_idle.c:111
  acpi_idle_enter+0xc5/0x160 drivers/acpi/processor_idle.c:702
  cpuidle_enter_state+0xaa/0x4f0 drivers/cpuidle/cpuidle.c:264
  cpuidle_enter+0x4e/0xa0 drivers/cpuidle/cpuidle.c:385
  cpuidle_idle_call kernel/sched/idle.c:230 [inline]
  do_idle+0x313/0x3f0 kernel/sched/idle.c:326
  cpu_startup_entry+0x4f/0x60 kernel/sched/idle.c:424
  start_secondary+0x222/0x2b0 arch/x86/kernel/smpboot.c:314
  common_startup_64+0x13e/0x148

to a SOFTIRQ-irq-unsafe lock:
 (tasklist_lock){.+.+}-{2:2}

... which became SOFTIRQ-irq-unsafe at:
...
  lock_acquire.part.0+0x11b/0x380 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:1648
  do_wait+0x219/0x570 kernel/exit.c:1692
  kernel_wait+0xa0/0x160 kernel/exit.c:1868
  call_usermodehelper_exec_sync kernel/umh.c:137 [inline]
  call_usermodehelper_exec_work+0xf1/0x170 kernel/umh.c:164
  process_one_work+0x9c5/0x1ba0 kernel/workqueue.c:3229
  process_scheduled_works kernel/workqueue.c:3310 [inline]
  worker_thread+0x6c8/0xf00 kernel/workqueue.c:3391
  kthread+0x2c1/0x3a0 kernel/kthread.c:389
  ret_from_fork+0x45/0x80 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:
  &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);
  <Interrupt>
    lock(&dev->event_lock#2);

 *** DEADLOCK ***

4 locks held by syz.1.3226/14892:
 #0: ffff88805b9de420 (sb_writers#6){.+.+}-{0:0}, at: do_rmdir+0x1e4/0x410 fs/namei.c:4383
 #1: ffff888077e38950 (&type->i_mutex_dir_key#5/1){+.+.}-{3:3}, at: inode_lock_nested include/linux/fs.h:850 [inline]
 #1: ffff888077e38950 (&type->i_mutex_dir_key#5/1){+.+.}-{3:3}, at: do_rmdir+0x235/0x410 fs/namei.c:4387
 #2: ffffffff8e1b8340 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire include/linux/rcupdate.h:337 [inline]
 #2: ffffffff8e1b8340 (rcu_read_lock){....}-{1:2}, at: rcu_read_lock include/linux/rcupdate.h:849 [inline]
 #2: ffffffff8e1b8340 (rcu_read_lock){....}-{1:2}, at: kill_fasync fs/fcntl.c:1150 [inline]
 #2: ffffffff8e1b8340 (rcu_read_lock){....}-{1:2}, at: kill_fasync+0x6d/0x520 fs/fcntl.c:1144
 #3: ffff8880290a9948 (&new->fa_lock){....}-{2:2}, at: kill_fasync_rcu fs/fcntl.c:1127 [inline]
 #3: ffff8880290a9948 (&new->fa_lock){....}-{2:2}, at: kill_fasync fs/fcntl.c:1151 [inline]
 #3: ffff8880290a9948 (&new->fa_lock){....}-{2:2}, at: kill_fasync+0x138/0x520 fs/fcntl.c:1144

the dependencies between SOFTIRQ-irq-safe lock and the holding lock:
  -> (&dev->event_lock#2){..-.}-{2:2} {
     IN-SOFTIRQ-W at:
                        lock_acquire.part.0+0x11b/0x380 kernel/locking/lockdep.c:5825
                        __raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:110 [inline]
                        _raw_spin_lock_irqsave+0x3a/0x60 kernel/locking/spinlock.c:162
                        input_inject_event+0xa4/0x370 drivers/input/input.c:423
                        kd_sound_helper+0x17a/0x280 drivers/tty/vt/keyboard.c:256
                        input_handler_for_each_handle+0xd4/0x250 drivers/input/input.c:2676
                        call_timer_fn+0x1a0/0x610 kernel/time/timer.c:1794
                        expire_timers kernel/time/timer.c:1845 [inline]
                        __run_timers+0x6e8/0x930 kernel/time/timer.c:2419
                        __run_timer_base kernel/time/timer.c:2430 [inline]
                        __run_timer_base kernel/time/timer.c:2423 [inline]
                        run_timer_base+0x111/0x190 kernel/time/timer.c:2439
                        run_timer_softirq+0x1a/0x40 kernel/time/timer.c:2449
                        handle_softirqs+0x213/0x8f0 kernel/softirq.c:554
                        __do_softirq kernel/softirq.c:588 [inline]
                        invoke_softirq kernel/softirq.c:428 [inline]
                        __irq_exit_rcu kernel/softirq.c:637 [inline]
                        irq_exit_rcu+0xbb/0x120 kernel/softirq.c:649
                        instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1037 [inline]
                        sysvec_apic_timer_interrupt+0xa4/0xc0 arch/x86/kernel/apic/apic.c:1037
                        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:106 [inline]
                        acpi_safe_halt+0x1a/0x20 drivers/acpi/processor_idle.c:111
                        acpi_idle_enter+0xc5/0x160 drivers/acpi/processor_idle.c:702
                        cpuidle_enter_state+0xaa/0x4f0 drivers/cpuidle/cpuidle.c:264
                        cpuidle_enter+0x4e/0xa0 drivers/cpuidle/cpuidle.c:385
                        cpuidle_idle_call kernel/sched/idle.c:230 [inline]
                        do_idle+0x313/0x3f0 kernel/sched/idle.c:326
                        cpu_startup_entry+0x4f/0x60 kernel/sched/idle.c:424
                        start_secondary+0x222/0x2b0 arch/x86/kernel/smpboot.c:314
                        common_startup_64+0x13e/0x148
     INITIAL USE at:
                       lock_acquire.part.0+0x11b/0x380 kernel/locking/lockdep.c:5825
                       __raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:110 [inline]
                       _raw_spin_lock_irqsave+0x3a/0x60 kernel/locking/spinlock.c:162
                       input_inject_event+0xa4/0x370 drivers/input/input.c:423
                       __led_set_brightness drivers/leds/led-core.c:52 [inline]
                       led_set_brightness_nopm drivers/leds/led-core.c:323 [inline]
                       led_set_brightness_nosleep drivers/leds/led-core.c:354 [inline]
                       led_set_brightness+0x211/0x290 drivers/leds/led-core.c:316
                       kbd_led_trigger_activate+0xcb/0x110 drivers/tty/vt/keyboard.c:1036
                       led_trigger_set+0x59a/0xc60 drivers/leds/led-triggers.c:212
                       led_match_default_trigger drivers/leds/led-triggers.c:269 [inline]
                       led_match_default_trigger drivers/leds/led-triggers.c:263 [inline]
                       led_trigger_set_default drivers/leds/led-triggers.c:287 [inline]
                       led_trigger_set_default+0x1bd/0x2a0 drivers/leds/led-triggers.c:276
                       led_classdev_register_ext+0x78c/0x9e0 drivers/leds/led-class.c:555
                       led_classdev_register include/linux/leds.h:273 [inline]
                       input_leds_connect+0x552/0x8e0 drivers/input/input-leds.c:145
                       input_attach_handler.isra.0+0x181/0x260 drivers/input/input.c:1027
                       input_register_device+0xa84/0x1110 drivers/input/input.c:2470
                       atkbd_connect+0x5e2/0xa20 drivers/input/keyboard/atkbd.c:1340
                       serio_connect_driver drivers/input/serio/serio.c:44 [inline]
                       serio_driver_probe+0x74/0xa0 drivers/input/serio/serio.c:775
                       call_driver_probe drivers/base/dd.c:579 [inline]
                       really_probe+0x23e/0xa90 drivers/base/dd.c:658
                       __driver_probe_device+0x1de/0x440 drivers/base/dd.c:800
                       driver_probe_device+0x4c/0x1b0 drivers/base/dd.c:830
                       __driver_attach+0x283/0x580 drivers/base/dd.c:1216
                       bus_for_each_dev+0x13c/0x1d0 drivers/base/bus.c:370
                       serio_attach_driver drivers/input/serio/serio.c:804 [inline]
                       serio_handle_event+0x2bb/0xa90 drivers/input/serio/serio.c:224
                       process_one_work+0x9c5/0x1ba0 kernel/workqueue.c:3229
                       process_scheduled_works kernel/workqueue.c:3310 [inline]
                       worker_thread+0x6c8/0xf00 kernel/workqueue.c:3391
                       kthread+0x2c1/0x3a0 kernel/kthread.c:389
                       ret_from_fork+0x45/0x80 arch/x86/kernel/process.c:147
                       ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244
   }
   ... key      at: [<ffffffff9ab2f260>] __key.7+0x0/0x40
 -> (&client->buffer_lock){....}-{2:2} {
    INITIAL USE at:
                     lock_acquire.part.0+0x11b/0x380 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+0x777/0x8e0 drivers/input/input.c:126
                     input_event_dispose drivers/input/input.c:352 [inline]
                     input_handle_event+0xb30/0x14d0 drivers/input/input.c:369
                     input_inject_event+0x1bb/0x370 drivers/input/input.c:428
                     kd_sound_helper+0x17a/0x280 drivers/tty/vt/keyboard.c:256
                     input_handler_for_each_handle+0xd4/0x250 drivers/input/input.c:2676
                     kd_mksound+0x89/0x130 drivers/tty/vt/keyboard.c:280
                     handle_ascii drivers/tty/vt/vt.c:2251 [inline]
                     do_con_trol drivers/tty/vt/vt.c:2568 [inline]
                     do_con_write+0x2e6f/0x7bb0 drivers/tty/vt/vt.c:3092
                     con_write+0x23/0xb0 drivers/tty/vt/vt.c:3434
                     process_output_block drivers/tty/n_tty.c:574 [inline]
                     n_tty_write+0x419/0x1140 drivers/tty/n_tty.c:2389
                     iterate_tty_write drivers/tty/tty_io.c:1015 [inline]
                     file_tty_write.constprop.0+0x506/0x9a0 drivers/tty/tty_io.c:1090
                     new_sync_write fs/read_write.c:590 [inline]
                     vfs_write+0x6b5/0x1140 fs/read_write.c:683
                     ksys_write+0x12f/0x260 fs/read_write.c:736
                     do_syscall_x64 arch/x86/entry/common.c:52 [inline]
                     do_syscall_64+0xcd/0x250 arch/x86/entry/common.c:83
                     entry_SYSCALL_64_after_hwframe+0x77/0x7f
  }
  ... key      at: [<ffffffff9ab2f6e0>] __key.1+0x0/0x40
  ... acquired at:
   __raw_spin_lock include/linux/spinlock_api_smp.h:133 [inline]
   _raw_spin_lock+0x2e/0x40 kernel/locking/spinlock.c:154
   spin_lock include/linux/spinlock.h:351 [inline]
   evdev_pass_values+0x10e/0x9b0 drivers/input/evdev.c:261
   evdev_events+0x1bb/0x390 drivers/input/evdev.c:306
   input_pass_values+0x777/0x8e0 drivers/input/input.c:126
   input_event_dispose drivers/input/input.c:352 [inline]
   input_handle_event+0xb30/0x14d0 drivers/input/input.c:369
   input_inject_event+0x1bb/0x370 drivers/input/input.c:428
   kd_sound_helper+0x17a/0x280 drivers/tty/vt/keyboard.c:256
   input_handler_for_each_handle+0xd4/0x250 drivers/input/input.c:2676
   kd_mksound+0x89/0x130 drivers/tty/vt/keyboard.c:280
   handle_ascii drivers/tty/vt/vt.c:2251 [inline]
   do_con_trol drivers/tty/vt/vt.c:2568 [inline]
   do_con_write+0x2e6f/0x7bb0 drivers/tty/vt/vt.c:3092
   con_write+0x23/0xb0 drivers/tty/vt/vt.c:3434
   process_output_block drivers/tty/n_tty.c:574 [inline]
   n_tty_write+0x419/0x1140 drivers/tty/n_tty.c:2389
   iterate_tty_write drivers/tty/tty_io.c:1015 [inline]
   file_tty_write.constprop.0+0x506/0x9a0 drivers/tty/tty_io.c:1090
   new_sync_write fs/read_write.c:590 [inline]
   vfs_write+0x6b5/0x1140 fs/read_write.c:683
   ksys_write+0x12f/0x260 fs/read_write.c:736
   do_syscall_x64 arch/x86/entry/common.c:52 [inline]
   do_syscall_64+0xcd/0x250 arch/x86/entry/common.c:83
   entry_SYSCALL_64_after_hwframe+0x77/0x7f

-> (&new->fa_lock){....}-{2:2} {
   INITIAL USE at:
                   lock_acquire.part.0+0x11b/0x380 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+0xb9/0x1e0 fs/fcntl.c:1004
                   fasync_helper+0xaf/0xd0 fs/fcntl.c:1107
                   sock_fasync+0x92/0x140 net/socket.c:1451
                   __fput+0x958/0xb60 fs/file_table.c:428
                   task_work_run+0x14e/0x250 kernel/task_work.c:228
                   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+0x27b/0x2a0 kernel/entry/common.c:218
                   do_syscall_64+0xda/0x250 arch/x86/entry/common.c:89
                   entry_SYSCALL_64_after_hwframe+0x77/0x7f
   INITIAL READ USE at:
                        lock_acquire.part.0+0x11b/0x380 kernel/locking/lockdep.c:5825
                        __raw_read_lock_irqsave include/linux/rwlock_api_smp.h:160 [inline]
                        _raw_read_lock_irqsave+0x46/0x90 kernel/locking/spinlock.c:236
                        kill_fasync_rcu fs/fcntl.c:1127 [inline]
                        kill_fasync fs/fcntl.c:1151 [inline]
                        kill_fasync+0x138/0x520 fs/fcntl.c:1144
                        tun_net_xmit+0x11db/0x1830 drivers/net/tun.c:1139
                        __netdev_start_xmit include/linux/netdevice.h:4916 [inline]
                        netdev_start_xmit include/linux/netdevice.h:4925 [inline]
                        xmit_one net/core/dev.c:3588 [inline]
                        dev_hard_start_xmit+0x143/0x790 net/core/dev.c:3604
                        sch_direct_xmit+0x1ae/0xc30 net/sched/sch_generic.c:343
                        __dev_xmit_skb net/core/dev.c:3821 [inline]
                        __dev_queue_xmit+0x136a/0x4350 net/core/dev.c:4394
                        dev_queue_xmit include/linux/netdevice.h:3094 [inline]
                        neigh_connected_output+0x45c/0x630 net/core/neighbour.c:1594
                        neigh_output include/net/neighbour.h:542 [inline]
                        ip6_finish_output2+0x6a7/0x1a50 net/ipv6/ip6_output.c:141
                        __ip6_finish_output net/ipv6/ip6_output.c:215 [inline]
                        ip6_finish_output+0x3f9/0x1300 net/ipv6/ip6_output.c:226
                        NF_HOOK_COND include/linux/netfilter.h:303 [inline]
                        ip6_output+0x1f8/0x540 net/ipv6/ip6_output.c:247
                        dst_output include/net/dst.h:450 [inline]
                        NF_HOOK include/linux/netfilter.h:314 [inline]
                        NF_HOOK include/linux/netfilter.h:308 [inline]
                        mld_sendpack+0x9f0/0x11d0 net/ipv6/mcast.c:1819
                        mld_send_initial_cr.part.0+0x1a1/0x260 net/ipv6/mcast.c:2237
                        mld_send_initial_cr include/linux/refcount.h:192 [inline]
                        ipv6_mc_dad_complete+0x22c/0x2b0 net/ipv6/mcast.c:2245
                        addrconf_dad_completed+0xd40/0x1060 net/ipv6/addrconf.c:4342
                        addrconf_dad_begin net/ipv6/addrconf.c:4127 [inline]
                        addrconf_dad_work+0xd5a/0x14d0 net/ipv6/addrconf.c:4229
                        process_one_work+0x9c5/0x1ba0 kernel/workqueue.c:3229
                        process_scheduled_works kernel/workqueue.c:3310 [inline]
                        worker_thread+0x6c8/0xf00 kernel/workqueue.c:3391
                        kthread+0x2c1/0x3a0 kernel/kthread.c:389
                        ret_from_fork+0x45/0x80 arch/x86/kernel/process.c:147
                        ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244
 }
 ... key      at: [<ffffffff9a8505c0>] __key.0+0x0/0x40
 ... acquired at:
   __raw_read_lock_irqsave include/linux/rwlock_api_smp.h:160 [inline]
   _raw_read_lock_irqsave+0x74/0x90 kernel/locking/spinlock.c:236
   kill_fasync_rcu fs/fcntl.c:1127 [inline]
   kill_fasync fs/fcntl.c:1151 [inline]
   kill_fasync+0x138/0x520 fs/fcntl.c:1144
   __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+0x777/0x8e0 drivers/input/input.c:126
   input_event_dispose drivers/input/input.c:341 [inline]
   input_handle_event+0xf0b/0x14d0 drivers/input/input.c:369
   input_inject_event+0x1bb/0x370 drivers/input/input.c:428
   evdev_write+0x44f/0x750 drivers/input/evdev.c:528
   vfs_write+0x28e/0x1140 fs/read_write.c:681
   ksys_write+0x1fa/0x260 fs/read_write.c:736
   do_syscall_x64 arch/x86/entry/common.c:52 [inline]
   do_syscall_64+0xcd/0x250 arch/x86/entry/common.c:83
   entry_SYSCALL_64_after_hwframe+0x77/0x7f


the dependencies between the lock to be acquired
 and SOFTIRQ-irq-unsafe lock:
 -> (tasklist_lock){.+.+}-{2:2} {
    HARDIRQ-ON-R at:
                      lock_acquire.part.0+0x11b/0x380 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:1648
                      do_wait+0x219/0x570 kernel/exit.c:1692
                      kernel_wait+0xa0/0x160 kernel/exit.c:1868
                      call_usermodehelper_exec_sync kernel/umh.c:137 [inline]
                      call_usermodehelper_exec_work+0xf1/0x170 kernel/umh.c:164
                      process_one_work+0x9c5/0x1ba0 kernel/workqueue.c:3229
                      process_scheduled_works kernel/workqueue.c:3310 [inline]
                      worker_thread+0x6c8/0xf00 kernel/workqueue.c:3391
                      kthread+0x2c1/0x3a0 kernel/kthread.c:389
                      ret_from_fork+0x45/0x80 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.part.0+0x11b/0x380 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:1648
                      do_wait+0x219/0x570 kernel/exit.c:1692
                      kernel_wait+0xa0/0x160 kernel/exit.c:1868
                      call_usermodehelper_exec_sync kernel/umh.c:137 [inline]
                      call_usermodehelper_exec_work+0xf1/0x170 kernel/umh.c:164
                      process_one_work+0x9c5/0x1ba0 kernel/workqueue.c:3229
                      process_scheduled_works kernel/workqueue.c:3310 [inline]
                      worker_thread+0x6c8/0xf00 kernel/workqueue.c:3391
                      kthread+0x2c1/0x3a0 kernel/kthread.c:389
                      ret_from_fork+0x45/0x80 arch/x86/kernel/process.c:147
                      ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244
    INITIAL USE at:
                     lock_acquire.part.0+0x11b/0x380 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+0x3feb/0x8dc0 kernel/fork.c:2503
                     kernel_clone+0xfd/0x960 kernel/fork.c:2787
                     user_mode_thread+0xb4/0xf0 kernel/fork.c:2865
                     rest_init+0x23/0x2b0 init/main.c:712
                     start_kernel+0x3e4/0x4d0 init/main.c:1105
                     x86_64_start_reservations+0x18/0x30 arch/x86/kernel/head64.c:507
                     x86_64_start_kernel+0xb2/0xc0 arch/x86/kernel/head64.c:488
                     common_startup_64+0x13e/0x148
    INITIAL READ USE at:
                          lock_acquire.part.0+0x11b/0x380 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:1648
                          do_wait+0x219/0x570 kernel/exit.c:1692
                          kernel_wait+0xa0/0x160 kernel/exit.c:1868
                          call_usermodehelper_exec_sync kernel/umh.c:137 [inline]
                          call_usermodehelper_exec_work+0xf1/0x170 kernel/umh.c:164
                          process_one_work+0x9c5/0x1ba0 kernel/workqueue.c:3229
                          process_scheduled_works kernel/workqueue.c:3310 [inline]
                          worker_thread+0x6c8/0xf00 kernel/workqueue.c:3391
                          kthread+0x2c1/0x3a0 kernel/kthread.c:389
                          ret_from_fork+0x45/0x80 arch/x86/kernel/process.c:147
                          ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244
  }
  ... key      at: [<ffffffff8de0a098>] 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_sigurg+0xf3/0xc80 fs/fcntl.c:970
   sk_send_sigurg+0x76/0x360 net/core/sock.c:3500
   tcp_check_urg net/ipv4/tcp_input.c:5838 [inline]
   tcp_urg+0x343/0xb80 net/ipv4/tcp_input.c:5879
   tcp_rcv_established+0x8a6/0x21c0 net/ipv4/tcp_input.c:6234
   tcp_v4_do_rcv+0x5ca/0xa90 net/ipv4/tcp_ipv4.c:1915
   sk_backlog_rcv include/net/sock.h:1113 [inline]
   __release_sock+0x31b/0x400 net/core/sock.c:3072
   release_sock+0x5a/0x220 net/core/sock.c:3626
   tcp_sendmsg+0x38/0x50 net/ipv4/tcp.c:1358
   inet_sendmsg+0xb9/0x140 net/ipv4/af_inet.c:853
   sock_sendmsg_nosec net/socket.c:729 [inline]
   __sock_sendmsg net/socket.c:744 [inline]
   ____sys_sendmsg+0x98c/0xc90 net/socket.c:2602
   ___sys_sendmsg+0x135/0x1e0 net/socket.c:2656
   __sys_sendmmsg+0x1a1/0x450 net/socket.c:2742
   __do_sys_sendmmsg net/socket.c:2771 [inline]
   __se_sys_sendmmsg net/socket.c:2768 [inline]
   __x64_sys_sendmmsg+0x9c/0x100 net/socket.c:2768
   do_syscall_x64 arch/x86/entry/common.c:52 [inline]
   do_syscall_64+0xcd/0x250 arch/x86/entry/common.c:83
   entry_SYSCALL_64_after_hwframe+0x77/0x7f

-> (&f_owner->lock){....}-{2:2} {
   INITIAL USE at:
                   lock_acquire.part.0+0x11b/0x380 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+0x67/0x3c0 fs/fcntl.c:137
                   f_setown+0x122/0x290 fs/fcntl.c:184
                   do_fcntl+0xf44/0x1510 fs/fcntl.c:510
                   __do_sys_fcntl fs/fcntl.c:586 [inline]
                   __se_sys_fcntl fs/fcntl.c:571 [inline]
                   __x64_sys_fcntl+0x176/0x210 fs/fcntl.c:571
                   do_syscall_x64 arch/x86/entry/common.c:52 [inline]
                   do_syscall_64+0xcd/0x250 arch/x86/entry/common.c:83
                   entry_SYSCALL_64_after_hwframe+0x77/0x7f
   INITIAL READ USE at:
                        lock_acquire.part.0+0x11b/0x380 kernel/locking/lockdep.c:5825
                        __raw_read_lock_irq include/linux/rwlock_api_smp.h:169 [inline]
                        _raw_read_lock_irq+0x67/0x80 kernel/locking/spinlock.c:244
                        f_getown_ex fs/fcntl.c:271 [inline]
                        do_fcntl+0x45b/0x1510 fs/fcntl.c:513
                        __do_sys_fcntl fs/fcntl.c:586 [inline]
                        __se_sys_fcntl fs/fcntl.c:571 [inline]
                        __x64_sys_fcntl+0x176/0x210 fs/fcntl.c:571
                        do_syscall_x64 arch/x86/entry/common.c:52 [inline]
                        do_syscall_64+0xcd/0x250 arch/x86/entry/common.c:83
                        entry_SYSCALL_64_after_hwframe+0x77/0x7f
 }
 ... key      at: [<ffffffff9a850600>] __key.1+0x0/0x40
 ... acquired at:
   lock_acquire.part.0+0x11b/0x380 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:910
   kill_fasync_rcu fs/fcntl.c:1136 [inline]
   kill_fasync fs/fcntl.c:1151 [inline]
   kill_fasync+0x21a/0x520 fs/fcntl.c:1144
   fsnotify_insert_event+0x3ab/0x4e0 fs/notify/notification.c:128
   fsnotify_add_event include/linux/fsnotify_backend.h:660 [inline]
   inotify_handle_inode_event+0x3f4/0x660 fs/notify/inotify/inotify_fsnotify.c:126
   inotify_ignored_and_remove_idr+0x28/0x70 fs/notify/inotify/inotify_user.c:526
   fsnotify_free_mark+0xe9/0x140 fs/notify/mark.c:572
   fsnotify_destroy_mark fs/notify/mark.c:581 [inline]
   fsnotify_destroy_marks+0x2d9/0x450 fs/notify/mark.c:934
   fsnotify_inoderemove include/linux/fsnotify.h:264 [inline]
   dentry_unlink_inode+0x3cb/0x480 fs/dcache.c:408
   d_delete fs/dcache.c:2405 [inline]
   d_delete+0x16d/0x1c0 fs/dcache.c:2394
   d_delete_notify include/linux/fsnotify.h:330 [inline]
   vfs_rmdir fs/namei.c:4353 [inline]
   vfs_rmdir+0x369/0x690 fs/namei.c:4317
   do_rmdir+0x3a2/0x410 fs/namei.c:4399
   __do_sys_rmdir fs/namei.c:4418 [inline]
   __se_sys_rmdir fs/namei.c:4416 [inline]
   __x64_sys_rmdir+0xc5/0x110 fs/namei.c:4416
   do_syscall_x64 arch/x86/entry/common.c:52 [inline]
   do_syscall_64+0xcd/0x250 arch/x86/entry/common.c:83
   entry_SYSCALL_64_after_hwframe+0x77/0x7f


stack backtrace:
CPU: 1 UID: 0 PID: 14892 Comm: syz.1.3226 Not tainted 6.12.0-rc1-syzkaller-00125-g0c559323bbaa #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024
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:2647 [inline]
 check_irq_usage+0xf22/0x1290 kernel/locking/lockdep.c:2888
 check_prev_add kernel/locking/lockdep.c:3165 [inline]
 check_prevs_add kernel/locking/lockdep.c:3280 [inline]
 validate_chain kernel/locking/lockdep.c:3904 [inline]
 __lock_acquire+0x2521/0x3ce0 kernel/locking/lockdep.c:5202
 lock_acquire.part.0+0x11b/0x380 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:910
 kill_fasync_rcu fs/fcntl.c:1136 [inline]
 kill_fasync fs/fcntl.c:1151 [inline]
 kill_fasync+0x21a/0x520 fs/fcntl.c:1144
 fsnotify_insert_event+0x3ab/0x4e0 fs/notify/notification.c:128
 fsnotify_add_event include/linux/fsnotify_backend.h:660 [inline]
 inotify_handle_inode_event+0x3f4/0x660 fs/notify/inotify/inotify_fsnotify.c:126
 inotify_ignored_and_remove_idr+0x28/0x70 fs/notify/inotify/inotify_user.c:526
 fsnotify_free_mark+0xe9/0x140 fs/notify/mark.c:572
 fsnotify_destroy_mark fs/notify/mark.c:581 [inline]
 fsnotify_destroy_marks+0x2d9/0x450 fs/notify/mark.c:934
 fsnotify_inoderemove include/linux/fsnotify.h:264 [inline]
 dentry_unlink_inode+0x3cb/0x480 fs/dcache.c:408
 d_delete fs/dcache.c:2405 [inline]
 d_delete+0x16d/0x1c0 fs/dcache.c:2394
 d_delete_notify include/linux/fsnotify.h:330 [inline]
 vfs_rmdir fs/namei.c:4353 [inline]
 vfs_rmdir+0x369/0x690 fs/namei.c:4317
 do_rmdir+0x3a2/0x410 fs/namei.c:4399
 __do_sys_rmdir fs/namei.c:4418 [inline]
 __se_sys_rmdir fs/namei.c:4416 [inline]
 __x64_sys_rmdir+0xc5/0x110 fs/namei.c:4416
 do_syscall_x64 arch/x86/entry/common.c:52 [inline]
 do_syscall_64+0xcd/0x250 arch/x86/entry/common.c:83
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f55b4d7dff9
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:00007f55b5bf1038 EFLAGS: 00000246 ORIG_RAX: 0000000000000054
RAX: ffffffffffffffda RBX: 00007f55b4f36058 RCX: 00007f55b4d7dff9
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000020000100
RBP: 00007f55b4df0296 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 00007f55b4f36058 R15: 00007ffcbd4f2a68
 </TASK>