=====================================================
WARNING: SOFTIRQ-safe -> SOFTIRQ-unsafe lock order detected
5.15.0-rc7-syzkaller #0 Not tainted
-----------------------------------------------------
syz-executor.2/27999 [HC0[0]:SC0[0]:HE0:SE1] is trying to acquire:
ffff8880801b7168 (&new->fa_lock){....}-{2:2}, at: kill_fasync_rcu fs/fcntl.c:1014 [inline]
ffff8880801b7168 (&new->fa_lock){....}-{2:2}, at: kill_fasync+0x13b/0x430 fs/fcntl.c:1035

and this task is already holding:
ffff888147dc2148 (&timer->lock){....}-{2:2}, at: snd_timer_start1+0x5b/0x640 sound/core/timer.c:541
which would create a new lock dependency:
 (&timer->lock){....}-{2:2} -> (&new->fa_lock){....}-{2:2}

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

... which became SOFTIRQ-irq-safe at:
  lock_acquire+0x19f/0x4d0 kernel/locking/lockdep.c:5625
  __raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:110 [inline]
  _raw_spin_lock_irqsave+0xd1/0x120 kernel/locking/spinlock.c:162
  snd_pcm_period_elapsed+0x2c/0x210 sound/core/pcm_lib.c:1847
  dummy_hrtimer_callback+0x87/0x190 sound/drivers/dummy.c:377
  __run_hrtimer kernel/time/hrtimer.c:1685 [inline]
  __hrtimer_run_queues+0x50b/0xa60 kernel/time/hrtimer.c:1749
  hrtimer_run_softirq+0x1b7/0x5d0 kernel/time/hrtimer.c:1766
  __do_softirq+0x392/0x7a3 kernel/softirq.c:558
  __irq_exit_rcu+0xec/0x170 kernel/softirq.c:636
  irq_exit_rcu+0x5/0x20 kernel/softirq.c:648
  sysvec_apic_timer_interrupt+0x91/0xb0 arch/x86/kernel/apic/apic.c:1097
  asm_sysvec_apic_timer_interrupt+0x12/0x20
  in_lock_functions+0x1c/0x20 kernel/locking/spinlock.c:404
  get_lock_parent_ip include/linux/ftrace.h:857 [inline]
  preempt_latency_start kernel/sched/core.c:5381 [inline]
  preempt_count_add+0x66/0x130 kernel/sched/core.c:5406
  unwind_next_frame+0xa9/0x1fa0 arch/x86/kernel/unwind_orc.c:428
  arch_stack_walk+0x112/0x140 arch/x86/kernel/stacktrace.c:25
  stack_trace_save+0x11b/0x1e0 kernel/stacktrace.c:121
  kasan_save_stack mm/kasan/common.c:38 [inline]
  kasan_set_track mm/kasan/common.c:46 [inline]
  set_alloc_info mm/kasan/common.c:434 [inline]
  __kasan_slab_alloc+0xb2/0xe0 mm/kasan/common.c:467
  kasan_slab_alloc include/linux/kasan.h:254 [inline]
  slab_post_alloc_hook mm/slab.h:519 [inline]
  slab_alloc_node mm/slub.c:3213 [inline]
  slab_alloc mm/slub.c:3221 [inline]
  kmem_cache_alloc+0x1c3/0x300 mm/slub.c:3226
  kmem_cache_zalloc include/linux/slab.h:711 [inline]
  __alloc_file+0x26/0x2f0 fs/file_table.c:101
  alloc_empty_file+0xa9/0x1b0 fs/file_table.c:150
  path_openat+0x111/0x3670 fs/namei.c:3547
  do_filp_open+0x277/0x4f0 fs/namei.c:3588
  do_sys_openat2+0x13b/0x500 fs/open.c:1200
  do_sys_open fs/open.c:1216 [inline]
  __do_sys_open fs/open.c:1224 [inline]
  __se_sys_open fs/open.c:1220 [inline]
  __x64_sys_open+0x221/0x270 fs/open.c:1220
  do_syscall_x64 arch/x86/entry/common.c:50 [inline]
  do_syscall_64+0x44/0xd0 arch/x86/entry/common.c:80
  entry_SYSCALL_64_after_hwframe+0x44/0xae

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

... which became SOFTIRQ-irq-unsafe at:
...
  lock_acquire+0x19f/0x4d0 kernel/locking/lockdep.c:5625
  __raw_read_lock include/linux/rwlock_api_smp.h:149 [inline]
  _raw_read_lock+0x32/0x40 kernel/locking/spinlock.c:228
  do_wait+0x224/0x9d0 kernel/exit.c:1504
  kernel_wait+0xe4/0x230 kernel/exit.c:1694
  call_usermodehelper_exec_sync kernel/umh.c:139 [inline]
  call_usermodehelper_exec_work+0xb4/0x220 kernel/umh.c:166
  process_one_work+0x853/0x1140 kernel/workqueue.c:2297
  worker_thread+0xac1/0x1320 kernel/workqueue.c:2444
  kthread+0x453/0x480 kernel/kthread.c:319
  ret_from_fork+0x1f/0x30

other info that might help us debug this:

Chain exists of:
  &group->lock --> &timer->lock --> tasklist_lock

 Possible interrupt unsafe locking scenario:

       CPU0                    CPU1
       ----                    ----
  lock(tasklist_lock);
                               local_irq_disable();
                               lock(&group->lock);
                               lock(&timer->lock);
  <Interrupt>
    lock(&group->lock);

 *** DEADLOCK ***

3 locks held by syz-executor.2/27999:
 #0: ffff88807b0bb968 (&tu->ioctl_lock){+.+.}-{3:3}, at: snd_timer_user_ioctl+0x4d/0x80 sound/core/timer.c:2128
 #1: ffff888147dc2148 (&timer->lock){....}-{2:2}, at: snd_timer_start1+0x5b/0x640 sound/core/timer.c:541
 #2: ffffffff8c91c980 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire+0x5/0x30 include/linux/rcupdate.h:266

the dependencies between SOFTIRQ-irq-safe lock and the holding lock:
 -> (&group->lock){..-.}-{2:2} {
    IN-SOFTIRQ-W at:
                      lock_acquire+0x19f/0x4d0 kernel/locking/lockdep.c:5625
                      __raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:110 [inline]
                      _raw_spin_lock_irqsave+0xd1/0x120 kernel/locking/spinlock.c:162
                      snd_pcm_period_elapsed+0x2c/0x210 sound/core/pcm_lib.c:1847
                      dummy_hrtimer_callback+0x87/0x190 sound/drivers/dummy.c:377
                      __run_hrtimer kernel/time/hrtimer.c:1685 [inline]
                      __hrtimer_run_queues+0x50b/0xa60 kernel/time/hrtimer.c:1749
                      hrtimer_run_softirq+0x1b7/0x5d0 kernel/time/hrtimer.c:1766
                      __do_softirq+0x392/0x7a3 kernel/softirq.c:558
                      __irq_exit_rcu+0xec/0x170 kernel/softirq.c:636
                      irq_exit_rcu+0x5/0x20 kernel/softirq.c:648
                      sysvec_apic_timer_interrupt+0x91/0xb0 arch/x86/kernel/apic/apic.c:1097
                      asm_sysvec_apic_timer_interrupt+0x12/0x20
                      in_lock_functions+0x1c/0x20 kernel/locking/spinlock.c:404
                      get_lock_parent_ip include/linux/ftrace.h:857 [inline]
                      preempt_latency_start kernel/sched/core.c:5381 [inline]
                      preempt_count_add+0x66/0x130 kernel/sched/core.c:5406
                      unwind_next_frame+0xa9/0x1fa0 arch/x86/kernel/unwind_orc.c:428
                      arch_stack_walk+0x112/0x140 arch/x86/kernel/stacktrace.c:25
                      stack_trace_save+0x11b/0x1e0 kernel/stacktrace.c:121
                      kasan_save_stack mm/kasan/common.c:38 [inline]
                      kasan_set_track mm/kasan/common.c:46 [inline]
                      set_alloc_info mm/kasan/common.c:434 [inline]
                      __kasan_slab_alloc+0xb2/0xe0 mm/kasan/common.c:467
                      kasan_slab_alloc include/linux/kasan.h:254 [inline]
                      slab_post_alloc_hook mm/slab.h:519 [inline]
                      slab_alloc_node mm/slub.c:3213 [inline]
                      slab_alloc mm/slub.c:3221 [inline]
                      kmem_cache_alloc+0x1c3/0x300 mm/slub.c:3226
                      kmem_cache_zalloc include/linux/slab.h:711 [inline]
                      __alloc_file+0x26/0x2f0 fs/file_table.c:101
                      alloc_empty_file+0xa9/0x1b0 fs/file_table.c:150
                      path_openat+0x111/0x3670 fs/namei.c:3547
                      do_filp_open+0x277/0x4f0 fs/namei.c:3588
                      do_sys_openat2+0x13b/0x500 fs/open.c:1200
                      do_sys_open fs/open.c:1216 [inline]
                      __do_sys_open fs/open.c:1224 [inline]
                      __se_sys_open fs/open.c:1220 [inline]
                      __x64_sys_open+0x221/0x270 fs/open.c:1220
                      do_syscall_x64 arch/x86/entry/common.c:50 [inline]
                      do_syscall_64+0x44/0xd0 arch/x86/entry/common.c:80
                      entry_SYSCALL_64_after_hwframe+0x44/0xae
    INITIAL USE at:
                     lock_acquire+0x19f/0x4d0 kernel/locking/lockdep.c:5625
                     __raw_spin_lock_irq include/linux/spinlock_api_smp.h:128 [inline]
                     _raw_spin_lock_irq+0xcf/0x110 kernel/locking/spinlock.c:170
                     spin_lock_irq include/linux/spinlock.h:388 [inline]
                     snd_pcm_group_lock_irq sound/core/pcm_native.c:97 [inline]
                     snd_pcm_stream_lock_irq sound/core/pcm_native.c:136 [inline]
                     snd_pcm_hw_params+0xca/0x1740 sound/core/pcm_native.c:686
                     snd_pcm_oss_change_params_locked+0x2453/0x43e0 sound/core/oss/pcm_oss.c:947
                     snd_pcm_oss_change_params sound/core/oss/pcm_oss.c:1091 [inline]
                     snd_pcm_oss_make_ready sound/core/oss/pcm_oss.c:1150 [inline]
                     snd_pcm_oss_sync+0x37c/0xee0 sound/core/oss/pcm_oss.c:1717
                     snd_pcm_oss_release+0x119/0x270 sound/core/oss/pcm_oss.c:2571
                     __fput+0x3fe/0x870 fs/file_table.c:280
                     task_work_run+0x146/0x1c0 kernel/task_work.c:164
                     tracehook_notify_resume include/linux/tracehook.h:189 [inline]
                     exit_to_user_mode_loop kernel/entry/common.c:175 [inline]
                     exit_to_user_mode_prepare+0x209/0x220 kernel/entry/common.c:207
                     __syscall_exit_to_user_mode_work kernel/entry/common.c:289 [inline]
                     syscall_exit_to_user_mode+0x2e/0x70 kernel/entry/common.c:300
                     do_syscall_64+0x53/0xd0 arch/x86/entry/common.c:86
                     entry_SYSCALL_64_after_hwframe+0x44/0xae
  }
  ... key      at: [<ffffffff90d8d020>] snd_pcm_group_init.__key+0x0/0x40
-> (&timer->lock){....}-{2:2} {
   INITIAL USE at:
                   lock_acquire+0x19f/0x4d0 kernel/locking/lockdep.c:5625
                   __raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:110 [inline]
                   _raw_spin_lock_irqsave+0xd1/0x120 kernel/locking/spinlock.c:162
                   snd_timer_notify+0x105/0x3e0 sound/core/timer.c:1087
                   snd_pcm_timer_notify sound/core/pcm_native.c:595 [inline]
                   snd_pcm_post_stop sound/core/pcm_native.c:1453 [inline]
                   snd_pcm_action_single sound/core/pcm_native.c:1229 [inline]
                   snd_pcm_action sound/core/pcm_native.c:1310 [inline]
                   snd_pcm_stop+0x3b8/0x4c0 sound/core/pcm_native.c:1476
                   snd_pcm_drop+0x16d/0x290 sound/core/pcm_native.c:2155
                   snd_pcm_oss_sync+0x4f4/0xee0 sound/core/oss/pcm_oss.c:1721
                   snd_pcm_oss_release+0x119/0x270 sound/core/oss/pcm_oss.c:2571
                   __fput+0x3fe/0x870 fs/file_table.c:280
                   task_work_run+0x146/0x1c0 kernel/task_work.c:164
                   tracehook_notify_resume include/linux/tracehook.h:189 [inline]
                   exit_to_user_mode_loop kernel/entry/common.c:175 [inline]
                   exit_to_user_mode_prepare+0x209/0x220 kernel/entry/common.c:207
                   __syscall_exit_to_user_mode_work kernel/entry/common.c:289 [inline]
                   syscall_exit_to_user_mode+0x2e/0x70 kernel/entry/common.c:300
                   do_syscall_64+0x53/0xd0 arch/x86/entry/common.c:86
                   entry_SYSCALL_64_after_hwframe+0x44/0xae
 }
 ... key      at: [<ffffffff90d8c5e0>] snd_timer_new.__key+0x0/0x40
 ... acquired at:
   lock_acquire+0x19f/0x4d0 kernel/locking/lockdep.c:5625
   __raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:110 [inline]
   _raw_spin_lock_irqsave+0xd1/0x120 kernel/locking/spinlock.c:162
   snd_timer_notify+0x105/0x3e0 sound/core/timer.c:1087
   snd_pcm_timer_notify sound/core/pcm_native.c:595 [inline]
   snd_pcm_post_stop sound/core/pcm_native.c:1453 [inline]
   snd_pcm_action_single sound/core/pcm_native.c:1229 [inline]
   snd_pcm_action sound/core/pcm_native.c:1310 [inline]
   snd_pcm_stop+0x3b8/0x4c0 sound/core/pcm_native.c:1476
   snd_pcm_drop+0x16d/0x290 sound/core/pcm_native.c:2155
   snd_pcm_oss_sync+0x4f4/0xee0 sound/core/oss/pcm_oss.c:1721
   snd_pcm_oss_release+0x119/0x270 sound/core/oss/pcm_oss.c:2571
   __fput+0x3fe/0x870 fs/file_table.c:280
   task_work_run+0x146/0x1c0 kernel/task_work.c:164
   tracehook_notify_resume include/linux/tracehook.h:189 [inline]
   exit_to_user_mode_loop kernel/entry/common.c:175 [inline]
   exit_to_user_mode_prepare+0x209/0x220 kernel/entry/common.c:207
   __syscall_exit_to_user_mode_work kernel/entry/common.c:289 [inline]
   syscall_exit_to_user_mode+0x2e/0x70 kernel/entry/common.c:300
   do_syscall_64+0x53/0xd0 arch/x86/entry/common.c:86
   entry_SYSCALL_64_after_hwframe+0x44/0xae


the dependencies between the lock to be acquired
 and SOFTIRQ-irq-unsafe lock:
  -> (tasklist_lock){.+.+}-{2:2} {
     HARDIRQ-ON-R at:
                        lock_acquire+0x19f/0x4d0 kernel/locking/lockdep.c:5625
                        __raw_read_lock include/linux/rwlock_api_smp.h:149 [inline]
                        _raw_read_lock+0x32/0x40 kernel/locking/spinlock.c:228
                        do_wait+0x224/0x9d0 kernel/exit.c:1504
                        kernel_wait+0xe4/0x230 kernel/exit.c:1694
                        call_usermodehelper_exec_sync kernel/umh.c:139 [inline]
                        call_usermodehelper_exec_work+0xb4/0x220 kernel/umh.c:166
                        process_one_work+0x853/0x1140 kernel/workqueue.c:2297
                        worker_thread+0xac1/0x1320 kernel/workqueue.c:2444
                        kthread+0x453/0x480 kernel/kthread.c:319
                        ret_from_fork+0x1f/0x30
     SOFTIRQ-ON-R at:
                        lock_acquire+0x19f/0x4d0 kernel/locking/lockdep.c:5625
                        __raw_read_lock include/linux/rwlock_api_smp.h:149 [inline]
                        _raw_read_lock+0x32/0x40 kernel/locking/spinlock.c:228
                        do_wait+0x224/0x9d0 kernel/exit.c:1504
                        kernel_wait+0xe4/0x230 kernel/exit.c:1694
                        call_usermodehelper_exec_sync kernel/umh.c:139 [inline]
                        call_usermodehelper_exec_work+0xb4/0x220 kernel/umh.c:166
                        process_one_work+0x853/0x1140 kernel/workqueue.c:2297
                        worker_thread+0xac1/0x1320 kernel/workqueue.c:2444
                        kthread+0x453/0x480 kernel/kthread.c:319
                        ret_from_fork+0x1f/0x30
     INITIAL USE at:
                       lock_acquire+0x19f/0x4d0 kernel/locking/lockdep.c:5625
                       __raw_write_lock_irq include/linux/rwlock_api_smp.h:196 [inline]
                       _raw_write_lock_irq+0xcf/0x110 kernel/locking/spinlock.c:316
                       copy_process+0x34b4/0x5c90 kernel/fork.c:2313
                       kernel_clone+0x230/0x7d0 kernel/fork.c:2584
                       kernel_thread+0x155/0x1d0 kernel/fork.c:2636
                       rest_init+0x21/0x2e0 init/main.c:699
                       start_kernel+0x4bf/0x56e init/main.c:1142
                       secondary_startup_64_no_verify+0xb1/0xbb
     INITIAL READ USE at:
                            lock_acquire+0x19f/0x4d0 kernel/locking/lockdep.c:5625
                            __raw_read_lock include/linux/rwlock_api_smp.h:149 [inline]
                            _raw_read_lock+0x32/0x40 kernel/locking/spinlock.c:228
                            do_wait+0x224/0x9d0 kernel/exit.c:1504
                            kernel_wait+0xe4/0x230 kernel/exit.c:1694
                            call_usermodehelper_exec_sync kernel/umh.c:139 [inline]
                            call_usermodehelper_exec_work+0xb4/0x220 kernel/umh.c:166
                            process_one_work+0x853/0x1140 kernel/workqueue.c:2297
                            worker_thread+0xac1/0x1320 kernel/workqueue.c:2444
                            kthread+0x453/0x480 kernel/kthread.c:319
                            ret_from_fork+0x1f/0x30
   }
   ... key      at: [<ffffffff8c60a058>] tasklist_lock+0x18/0x40
   ... acquired at:
   lock_acquire+0x19f/0x4d0 kernel/locking/lockdep.c:5625
   __raw_read_lock include/linux/rwlock_api_smp.h:149 [inline]
   _raw_read_lock+0x32/0x40 kernel/locking/spinlock.c:228
   send_sigio+0xbe/0x300 fs/fcntl.c:810
   kill_fasync_rcu fs/fcntl.c:1021 [inline]
   kill_fasync+0x1e4/0x430 fs/fcntl.c:1035
   sock_wake_async+0x133/0x150
   rcu_read_unlock include/linux/rcupdate.h:716 [inline]
   sk_wake_async+0x12e/0x200 include/net/sock.h:2369
   sock_def_readable+0x152/0x200 net/core/sock.c:3056
   unix_dgram_sendmsg+0x19cc/0x2a50 net/unix/af_unix.c:1941
   sock_sendmsg_nosec net/socket.c:704 [inline]
   sock_sendmsg net/socket.c:724 [inline]
   ____sys_sendmsg+0x5b9/0x910 net/socket.c:2409
   ___sys_sendmsg net/socket.c:2463 [inline]
   __sys_sendmmsg+0x57e/0x800 net/socket.c:2549
   __do_sys_sendmmsg net/socket.c:2578 [inline]
   __se_sys_sendmmsg net/socket.c:2575 [inline]
   __x64_sys_sendmmsg+0x9c/0xb0 net/socket.c:2575
   do_syscall_x64 arch/x86/entry/common.c:50 [inline]
   do_syscall_64+0x44/0xd0 arch/x86/entry/common.c:80
   entry_SYSCALL_64_after_hwframe+0x44/0xae

 -> (&f->f_owner.lock){....}-{2:2} {
    INITIAL USE at:
                     lock_acquire+0x19f/0x4d0 kernel/locking/lockdep.c:5625
                     __raw_write_lock_irq include/linux/rwlock_api_smp.h:196 [inline]
                     _raw_write_lock_irq+0xcf/0x110 kernel/locking/spinlock.c:316
                     f_modown+0x38/0x340 fs/fcntl.c:91
                     __f_setown fs/fcntl.c:110 [inline]
                     f_setown+0x113/0x1a0 fs/fcntl.c:138
                     sock_ioctl+0x405/0x990 net/socket.c:1178
                     vfs_ioctl fs/ioctl.c:51 [inline]
                     __do_sys_ioctl fs/ioctl.c:874 [inline]
                     __se_sys_ioctl+0xfb/0x170 fs/ioctl.c:860
                     do_syscall_x64 arch/x86/entry/common.c:50 [inline]
                     do_syscall_64+0x44/0xd0 arch/x86/entry/common.c:80
                     entry_SYSCALL_64_after_hwframe+0x44/0xae
    INITIAL READ USE at:
                          lock_acquire+0x19f/0x4d0 kernel/locking/lockdep.c:5625
                          __raw_read_lock_irq include/linux/rwlock_api_smp.h:169 [inline]
                          _raw_read_lock_irq+0xd6/0x120 kernel/locking/spinlock.c:244
                          f_getown_ex fs/fcntl.c:212 [inline]
                          do_fcntl+0x162/0x1560 fs/fcntl.c:396
                          __do_sys_fcntl fs/fcntl.c:472 [inline]
                          __se_sys_fcntl+0xd8/0x1b0 fs/fcntl.c:457
                          do_syscall_x64 arch/x86/entry/common.c:50 [inline]
                          do_syscall_64+0x44/0xd0 arch/x86/entry/common.c:80
                          entry_SYSCALL_64_after_hwframe+0x44/0xae
  }
  ... key      at: [<ffffffff909fe1a0>] __alloc_file.__key+0x0/0x10
  ... acquired at:
   lock_acquire+0x19f/0x4d0 kernel/locking/lockdep.c:5625
   __raw_read_lock_irqsave include/linux/rwlock_api_smp.h:159 [inline]
   _raw_read_lock_irqsave+0xd9/0x120 kernel/locking/spinlock.c:236
   send_sigio+0x2f/0x300 fs/fcntl.c:796
   kill_fasync_rcu fs/fcntl.c:1021 [inline]
   kill_fasync+0x1e4/0x430 fs/fcntl.c:1035
   sock_wake_async+0x133/0x150
   rcu_read_unlock include/linux/rcupdate.h:716 [inline]
   sk_wake_async+0x12e/0x200 include/net/sock.h:2369
   sock_def_readable+0x152/0x200 net/core/sock.c:3056
   unix_dgram_sendmsg+0x19cc/0x2a50 net/unix/af_unix.c:1941
   sock_sendmsg_nosec net/socket.c:704 [inline]
   sock_sendmsg net/socket.c:724 [inline]
   ____sys_sendmsg+0x5b9/0x910 net/socket.c:2409
   ___sys_sendmsg net/socket.c:2463 [inline]
   __sys_sendmmsg+0x57e/0x800 net/socket.c:2549
   __do_sys_sendmmsg net/socket.c:2578 [inline]
   __se_sys_sendmmsg net/socket.c:2575 [inline]
   __x64_sys_sendmmsg+0x9c/0xb0 net/socket.c:2575
   do_syscall_x64 arch/x86/entry/common.c:50 [inline]
   do_syscall_64+0x44/0xd0 arch/x86/entry/common.c:80
   entry_SYSCALL_64_after_hwframe+0x44/0xae

-> (&new->fa_lock){....}-{2:2} {
   INITIAL USE at:
                   lock_acquire+0x19f/0x4d0 kernel/locking/lockdep.c:5625
                   __raw_write_lock_irq include/linux/rwlock_api_smp.h:196 [inline]
                   _raw_write_lock_irq+0xcf/0x110 kernel/locking/spinlock.c:316
                   fasync_remove_entry+0xff/0x1d0 fs/fcntl.c:891
                   sock_fasync+0x86/0xf0 net/socket.c:1339
                   __fput+0x720/0x870 fs/file_table.c:277
                   task_work_run+0x146/0x1c0 kernel/task_work.c:164
                   tracehook_notify_resume include/linux/tracehook.h:189 [inline]
                   exit_to_user_mode_loop kernel/entry/common.c:175 [inline]
                   exit_to_user_mode_prepare+0x209/0x220 kernel/entry/common.c:207
                   __syscall_exit_to_user_mode_work kernel/entry/common.c:289 [inline]
                   syscall_exit_to_user_mode+0x2e/0x70 kernel/entry/common.c:300
                   do_syscall_64+0x53/0xd0 arch/x86/entry/common.c:86
                   entry_SYSCALL_64_after_hwframe+0x44/0xae
   INITIAL READ USE at:
                        lock_acquire+0x19f/0x4d0 kernel/locking/lockdep.c:5625
                        __raw_read_lock_irqsave include/linux/rwlock_api_smp.h:159 [inline]
                        _raw_read_lock_irqsave+0xd9/0x120 kernel/locking/spinlock.c:236
                        kill_fasync_rcu fs/fcntl.c:1014 [inline]
                        kill_fasync+0x13b/0x430 fs/fcntl.c:1035
                        sock_wake_async+0x133/0x150
                        rcu_read_unlock include/linux/rcupdate.h:716 [inline]
                        sk_wake_async+0x12e/0x200 include/net/sock.h:2369
                        sock_def_readable+0x152/0x200 net/core/sock.c:3056
                        unix_dgram_sendmsg+0x19cc/0x2a50 net/unix/af_unix.c:1941
                        sock_sendmsg_nosec net/socket.c:704 [inline]
                        sock_sendmsg net/socket.c:724 [inline]
                        ____sys_sendmsg+0x5b9/0x910 net/socket.c:2409
                        ___sys_sendmsg net/socket.c:2463 [inline]
                        __sys_sendmmsg+0x57e/0x800 net/socket.c:2549
                        __do_sys_sendmmsg net/socket.c:2578 [inline]
                        __se_sys_sendmmsg net/socket.c:2575 [inline]
                        __x64_sys_sendmmsg+0x9c/0xb0 net/socket.c:2575
                        do_syscall_x64 arch/x86/entry/common.c:50 [inline]
                        do_syscall_64+0x44/0xd0 arch/x86/entry/common.c:80
                        entry_SYSCALL_64_after_hwframe+0x44/0xae
 }
 ... key      at: [<ffffffff909ff060>] fasync_insert_entry.__key+0x0/0x40
 ... acquired at:
   lock_acquire+0x19f/0x4d0 kernel/locking/lockdep.c:5625
   __raw_read_lock_irqsave include/linux/rwlock_api_smp.h:159 [inline]
   _raw_read_lock_irqsave+0xd9/0x120 kernel/locking/spinlock.c:236
   kill_fasync_rcu fs/fcntl.c:1014 [inline]
   kill_fasync+0x13b/0x430 fs/fcntl.c:1035
   snd_timer_user_ccallback+0x370/0x540 sound/core/timer.c:1387
   snd_timer_notify1+0x1ad/0x350 sound/core/timer.c:516
   snd_timer_start1+0x53d/0x640 sound/core/timer.c:578
   snd_timer_start sound/core/timer.c:697 [inline]
   snd_timer_user_start sound/core/timer.c:1985 [inline]
   __snd_timer_user_ioctl+0xe8b/0x60a0 sound/core/timer.c:2108
   snd_timer_user_ioctl+0x5d/0x80 sound/core/timer.c:2129
   vfs_ioctl fs/ioctl.c:51 [inline]
   __do_sys_ioctl fs/ioctl.c:874 [inline]
   __se_sys_ioctl+0xfb/0x170 fs/ioctl.c:860
   do_syscall_x64 arch/x86/entry/common.c:50 [inline]
   do_syscall_64+0x44/0xd0 arch/x86/entry/common.c:80
   entry_SYSCALL_64_after_hwframe+0x44/0xae


stack backtrace:
CPU: 1 PID: 27999 Comm: syz-executor.2 Not tainted 5.15.0-rc7-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Call Trace:
 __dump_stack lib/dump_stack.c:88 [inline]
 dump_stack_lvl+0x1dc/0x2d8 lib/dump_stack.c:106
 print_bad_irq_dependency kernel/locking/lockdep.c:2565 [inline]
 check_irq_usage kernel/locking/lockdep.c:2804 [inline]
 check_prev_add kernel/locking/lockdep.c:3055 [inline]
 check_prevs_add kernel/locking/lockdep.c:3174 [inline]
 validate_chain+0x6f4c/0x8240 kernel/locking/lockdep.c:3789
 __lock_acquire+0x1382/0x2b00 kernel/locking/lockdep.c:5015
 lock_acquire+0x19f/0x4d0 kernel/locking/lockdep.c:5625
 __raw_read_lock_irqsave include/linux/rwlock_api_smp.h:159 [inline]
 _raw_read_lock_irqsave+0xd9/0x120 kernel/locking/spinlock.c:236
 kill_fasync_rcu fs/fcntl.c:1014 [inline]
 kill_fasync+0x13b/0x430 fs/fcntl.c:1035
 snd_timer_user_ccallback+0x370/0x540 sound/core/timer.c:1387
 snd_timer_notify1+0x1ad/0x350 sound/core/timer.c:516
 snd_timer_start1+0x53d/0x640 sound/core/timer.c:578
 snd_timer_start sound/core/timer.c:697 [inline]
 snd_timer_user_start sound/core/timer.c:1985 [inline]
 __snd_timer_user_ioctl+0xe8b/0x60a0 sound/core/timer.c:2108
 snd_timer_user_ioctl+0x5d/0x80 sound/core/timer.c:2129
 vfs_ioctl fs/ioctl.c:51 [inline]
 __do_sys_ioctl fs/ioctl.c:874 [inline]
 __se_sys_ioctl+0xfb/0x170 fs/ioctl.c:860
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x44/0xd0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x44/0xae
RIP: 0033:0x7f3a3e01ca39
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 bc ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f3a3b592188 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 00007f3a3e12ff60 RCX: 00007f3a3e01ca39
RDX: 0000000000000000 RSI: 00000000000054a0 RDI: 0000000000000003
RBP: 00007f3a3e076e8f R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007ffc687bf1af R14: 00007f3a3b592300 R15: 0000000000022000