possible deadlock in snd_timer

possible deadlock in snd_timer_notify (2)
Status: upstream: reported on 2021/11/12 18:58
Reported-by: syzbot+49b10793b867871ee26f@syzkaller.appspotmail.com
First crash: 20d, last: 4d16h
similar bugs (1):
Kernel	Title	Repro	Cause bisect	Fix bisect	Count	Last	Reported	Patched	Status
upstream	possible deadlock in snd_timer_notify				119	23d	129d	22/22	fixed on 2021/11/10 00:50
Sample crash report:
WARNING: SOFTIRQ-safe -> SOFTIRQ-unsafe lock order detected
5.16.0-rc2-syzkaller #0 Not tainted
-----------------------------------------------------
syz-executor.3/20756 [HC0[0]:SC0[0]:HE0:SE1] is trying to acquire:
ffff888075e092b8 (&new->fa_lock){.-.-}-{2:2}, at: kill_fasync_rcu fs/fcntl.c:1014 [inline]
ffff888075e092b8 (&new->fa_lock){.-.-}-{2:2}, at: kill_fasync fs/fcntl.c:1035 [inline]
ffff888075e092b8 (&new->fa_lock){.-.-}-{2:2}, at: kill_fasync+0x136/0x470 fs/fcntl.c:1028

and this task is already holding:
ffff8881485e8148 (&timer->lock){..-.}-{2:2}, at: snd_timer_start1+0x5a/0x800 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:
 (&timer->lock){..-.}-{2:2}

... which became SOFTIRQ-irq-safe at:
  lock_acquire kernel/locking/lockdep.c:5637 [inline]
  lock_acquire+0x1ab/0x510 kernel/locking/lockdep.c:5602
  __raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:110 [inline]
  _raw_spin_lock_irqsave+0x39/0x50 kernel/locking/spinlock.c:162
  snd_timer_notify sound/core/timer.c:1086 [inline]
  snd_timer_notify+0x10c/0x3d0 sound/core/timer.c:1073
  snd_pcm_timer_notify sound/core/pcm_native.c:595 [inline]
  snd_pcm_post_stop+0x195/0x1f0 sound/core/pcm_native.c:1453
  snd_pcm_action_single sound/core/pcm_native.c:1229 [inline]
  snd_pcm_drain_done+0xdc/0x120 sound/core/pcm_native.c:1491
  snd_pcm_update_state+0x43b/0x540 sound/core/pcm_lib.c:191
  snd_pcm_update_hw_ptr0+0xa75/0x1a50 sound/core/pcm_lib.c:465
  snd_pcm_period_elapsed_under_stream_lock+0x15a/0x230 sound/core/pcm_lib.c:1817
  snd_pcm_period_elapsed+0x28/0x50 sound/core/pcm_lib.c:1849
  dummy_hrtimer_callback+0x94/0x1b0 sound/drivers/dummy.c:377
  __run_hrtimer kernel/time/hrtimer.c:1685 [inline]
  __hrtimer_run_queues+0x609/0xe50 kernel/time/hrtimer.c:1749
  hrtimer_run_softirq+0x17b/0x360 kernel/time/hrtimer.c:1766
  __do_softirq+0x29b/0x9c2 kernel/softirq.c:558
  invoke_softirq kernel/softirq.c:432 [inline]
  __irq_exit_rcu+0x123/0x180 kernel/softirq.c:636
  irq_exit_rcu+0x5/0x20 kernel/softirq.c:648
  sysvec_apic_timer_interrupt+0x93/0xc0 arch/x86/kernel/apic/apic.c:1097
  asm_sysvec_apic_timer_interrupt+0x12/0x20 arch/x86/include/asm/idtentry.h:638
  native_safe_halt arch/x86/include/asm/irqflags.h:51 [inline]
  arch_safe_halt arch/x86/include/asm/irqflags.h:89 [inline]
  acpi_safe_halt drivers/acpi/processor_idle.c:109 [inline]
  acpi_idle_do_entry+0x1c6/0x250 drivers/acpi/processor_idle.c:553
  acpi_idle_enter+0x361/0x500 drivers/acpi/processor_idle.c:688
  cpuidle_enter_state+0x1b1/0xc80 drivers/cpuidle/cpuidle.c:237
  cpuidle_enter+0x4a/0xa0 drivers/cpuidle/cpuidle.c:351
  call_cpuidle kernel/sched/idle.c:158 [inline]
  cpuidle_idle_call kernel/sched/idle.c:239 [inline]
  do_idle+0x3e8/0x590 kernel/sched/idle.c:306
  cpu_startup_entry+0x14/0x20 kernel/sched/idle.c:403
  start_secondary+0x265/0x340 arch/x86/kernel/smpboot.c:272
  secondary_startup_64_no_verify+0xb0/0xbb

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

... which became SOFTIRQ-irq-unsafe at:
...
  lock_acquire kernel/locking/lockdep.c:5637 [inline]
  lock_acquire+0x1ab/0x510 kernel/locking/lockdep.c:5602
  __raw_read_lock include/linux/rwlock_api_smp.h:149 [inline]
  _raw_read_lock+0x5b/0x70 kernel/locking/spinlock.c:228
  do_wait+0x284/0xce0 kernel/exit.c:1511
  kernel_wait+0x9c/0x150 kernel/exit.c:1701
  call_usermodehelper_exec_sync kernel/umh.c:139 [inline]
  call_usermodehelper_exec_work+0xf5/0x180 kernel/umh.c:166
  process_one_work+0x9b2/0x1690 kernel/workqueue.c:2298
  worker_thread+0x658/0x11f0 kernel/workqueue.c:2445
  kthread+0x405/0x4f0 kernel/kthread.c:327
  ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:295

other info that might help us debug this:

Chain exists of:
  &timer->lock --> &new->fa_lock --> tasklist_lock

 Possible interrupt unsafe locking scenario:

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

 *** DEADLOCK ***

3 locks held by syz-executor.3/20756:
 #0: ffff88807c977d68 (&tu->ioctl_lock){+.+.}-{3:3}, at: snd_timer_user_ioctl+0x4c/0xb0 sound/core/timer.c:2127
 #1: ffff8881485e8148 (&timer->lock){..-.}-{2:2}, at: snd_timer_start1+0x5a/0x800 sound/core/timer.c:541
 #2: ffffffff8bb83ca0 (rcu_read_lock){....}-{1:2}, at: kill_fasync+0x41/0x470 fs/fcntl.c:1033

the dependencies between SOFTIRQ-irq-safe lock and the holding lock:
-> (&timer->lock){..-.}-{2:2} {
   IN-SOFTIRQ-W at:
                    lock_acquire kernel/locking/lockdep.c:5637 [inline]
                    lock_acquire+0x1ab/0x510 kernel/locking/lockdep.c:5602
                    __raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:110 [inline]
                    _raw_spin_lock_irqsave+0x39/0x50 kernel/locking/spinlock.c:162
                    snd_timer_notify sound/core/timer.c:1086 [inline]
                    snd_timer_notify+0x10c/0x3d0 sound/core/timer.c:1073
                    snd_pcm_timer_notify sound/core/pcm_native.c:595 [inline]
                    snd_pcm_post_stop+0x195/0x1f0 sound/core/pcm_native.c:1453
                    snd_pcm_action_single sound/core/pcm_native.c:1229 [inline]
                    snd_pcm_drain_done+0xdc/0x120 sound/core/pcm_native.c:1491
                    snd_pcm_update_state+0x43b/0x540 sound/core/pcm_lib.c:191
                    snd_pcm_update_hw_ptr0+0xa75/0x1a50 sound/core/pcm_lib.c:465
                    snd_pcm_period_elapsed_under_stream_lock+0x15a/0x230 sound/core/pcm_lib.c:1817
                    snd_pcm_period_elapsed+0x28/0x50 sound/core/pcm_lib.c:1849
                    dummy_hrtimer_callback+0x94/0x1b0 sound/drivers/dummy.c:377
                    __run_hrtimer kernel/time/hrtimer.c:1685 [inline]
                    __hrtimer_run_queues+0x609/0xe50 kernel/time/hrtimer.c:1749
                    hrtimer_run_softirq+0x17b/0x360 kernel/time/hrtimer.c:1766
                    __do_softirq+0x29b/0x9c2 kernel/softirq.c:558
                    invoke_softirq kernel/softirq.c:432 [inline]
                    __irq_exit_rcu+0x123/0x180 kernel/softirq.c:636
                    irq_exit_rcu+0x5/0x20 kernel/softirq.c:648
                    sysvec_apic_timer_interrupt+0x93/0xc0 arch/x86/kernel/apic/apic.c:1097
                    asm_sysvec_apic_timer_interrupt+0x12/0x20 arch/x86/include/asm/idtentry.h:638
                    native_safe_halt arch/x86/include/asm/irqflags.h:51 [inline]
                    arch_safe_halt arch/x86/include/asm/irqflags.h:89 [inline]
                    acpi_safe_halt drivers/acpi/processor_idle.c:109 [inline]
                    acpi_idle_do_entry+0x1c6/0x250 drivers/acpi/processor_idle.c:553
                    acpi_idle_enter+0x361/0x500 drivers/acpi/processor_idle.c:688
                    cpuidle_enter_state+0x1b1/0xc80 drivers/cpuidle/cpuidle.c:237
                    cpuidle_enter+0x4a/0xa0 drivers/cpuidle/cpuidle.c:351
                    call_cpuidle kernel/sched/idle.c:158 [inline]
                    cpuidle_idle_call kernel/sched/idle.c:239 [inline]
                    do_idle+0x3e8/0x590 kernel/sched/idle.c:306
                    cpu_startup_entry+0x14/0x20 kernel/sched/idle.c:403
                    start_secondary+0x265/0x340 arch/x86/kernel/smpboot.c:272
                    secondary_startup_64_no_verify+0xb0/0xbb
   INITIAL USE at:
                   lock_acquire kernel/locking/lockdep.c:5637 [inline]
                   lock_acquire+0x1ab/0x510 kernel/locking/lockdep.c:5602
                   __raw_spin_lock_irq include/linux/spinlock_api_smp.h:119 [inline]
                   _raw_spin_lock_irq+0x32/0x50 kernel/locking/spinlock.c:170
                   spin_lock_irq include/linux/spinlock.h:374 [inline]
                   snd_pcm_detach_substream+0x16b/0x360 sound/core/pcm.c:995
                   snd_pcm_release_substream sound/core/pcm_native.c:2635 [inline]
                   snd_pcm_release+0x111/0x230 sound/core/pcm_native.c:2830
                   __fput+0x286/0x9f0 fs/file_table.c:280
                   task_work_run+0xdd/0x1a0 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+0x27e/0x290 kernel/entry/common.c:207
                   __syscall_exit_to_user_mode_work kernel/entry/common.c:289 [inline]
                   syscall_exit_to_user_mode+0x19/0x60 kernel/entry/common.c:300
                   do_syscall_64+0x42/0xb0 arch/x86/entry/common.c:86
                   entry_SYSCALL_64_after_hwframe+0x44/0xae
 }
 ... key      at: [<ffffffff90831580>] __key.12+0x0/0x40

the dependencies between the lock to be acquired
 and SOFTIRQ-irq-unsafe lock:
  -> (tasklist_lock){.+.+}-{2:2} {
     HARDIRQ-ON-R at:
                        lock_acquire kernel/locking/lockdep.c:5637 [inline]
                        lock_acquire+0x1ab/0x510 kernel/locking/lockdep.c:5602
                        __raw_read_lock include/linux/rwlock_api_smp.h:149 [inline]
                        _raw_read_lock+0x5b/0x70 kernel/locking/spinlock.c:228
                        do_wait+0x284/0xce0 kernel/exit.c:1511
                        kernel_wait+0x9c/0x150 kernel/exit.c:1701
                        call_usermodehelper_exec_sync kernel/umh.c:139 [inline]
                        call_usermodehelper_exec_work+0xf5/0x180 kernel/umh.c:166
                        process_one_work+0x9b2/0x1690 kernel/workqueue.c:2298
                        worker_thread+0x658/0x11f0 kernel/workqueue.c:2445
                        kthread+0x405/0x4f0 kernel/kthread.c:327
                        ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:295
     SOFTIRQ-ON-R at:
                        lock_acquire kernel/locking/lockdep.c:5637 [inline]
                        lock_acquire+0x1ab/0x510 kernel/locking/lockdep.c:5602
                        __raw_read_lock include/linux/rwlock_api_smp.h:149 [inline]
                        _raw_read_lock+0x5b/0x70 kernel/locking/spinlock.c:228
                        do_wait+0x284/0xce0 kernel/exit.c:1511
                        kernel_wait+0x9c/0x150 kernel/exit.c:1701
                        call_usermodehelper_exec_sync kernel/umh.c:139 [inline]
                        call_usermodehelper_exec_work+0xf5/0x180 kernel/umh.c:166
                        process_one_work+0x9b2/0x1690 kernel/workqueue.c:2298
                        worker_thread+0x658/0x11f0 kernel/workqueue.c:2445
                        kthread+0x405/0x4f0 kernel/kthread.c:327
                        ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:295
     INITIAL USE at:
                       lock_acquire kernel/locking/lockdep.c:5637 [inline]
                       lock_acquire+0x1ab/0x510 kernel/locking/lockdep.c:5602
                       __raw_write_lock_irq include/linux/rwlock_api_smp.h:194 [inline]
                       _raw_write_lock_irq+0x32/0x50 kernel/locking/spinlock.c:316
                       copy_process+0x36c8/0x75a0 kernel/fork.c:2311
                       kernel_clone+0xe7/0xab0 kernel/fork.c:2582
                       kernel_thread+0xb5/0xf0 kernel/fork.c:2634
                       rest_init+0x23/0x3e0 init/main.c:690
                       start_kernel+0x47a/0x49b init/main.c:1135
                       secondary_startup_64_no_verify+0xb0/0xbb
     INITIAL READ USE at:
                            lock_acquire kernel/locking/lockdep.c:5637 [inline]
                            lock_acquire+0x1ab/0x510 kernel/locking/lockdep.c:5602
                            __raw_read_lock include/linux/rwlock_api_smp.h:149 [inline]
                            _raw_read_lock+0x5b/0x70 kernel/locking/spinlock.c:228
                            do_wait+0x284/0xce0 kernel/exit.c:1511
                            kernel_wait+0x9c/0x150 kernel/exit.c:1701
                            call_usermodehelper_exec_sync kernel/umh.c:139 [inline]
                            call_usermodehelper_exec_work+0xf5/0x180 kernel/umh.c:166
                            process_one_work+0x9b2/0x1690 kernel/workqueue.c:2298
                            worker_thread+0x658/0x11f0 kernel/workqueue.c:2445
                            kthread+0x405/0x4f0 kernel/kthread.c:327
                            ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:295
   }
   ... key      at: [<ffffffff8b80a098>] tasklist_lock+0x18/0x40
   ... acquired at:
   __raw_read_lock include/linux/rwlock_api_smp.h:149 [inline]
   _raw_read_lock+0x5b/0x70 kernel/locking/spinlock.c:228
   send_sigio+0xab/0x380 fs/fcntl.c:810
   kill_fasync_rcu fs/fcntl.c:1021 [inline]
   kill_fasync fs/fcntl.c:1035 [inline]
   kill_fasync+0x1f8/0x470 fs/fcntl.c:1028
   sock_wake_async+0xd2/0x160 net/socket.c:1368
   sk_wake_async include/net/sock.h:2400 [inline]
   sk_wake_async include/net/sock.h:2396 [inline]
   sock_def_readable+0x349/0x4e0 net/core/sock.c:3138
   unix_dgram_sendmsg+0xfa7/0x1950 net/unix/af_unix.c:1941
   sock_sendmsg_nosec net/socket.c:704 [inline]
   sock_sendmsg+0xcf/0x120 net/socket.c:724
   ____sys_sendmsg+0x331/0x810 net/socket.c:2409
   ___sys_sendmsg+0xf3/0x170 net/socket.c:2463
   __sys_sendmmsg+0x195/0x470 net/socket.c:2549
   __do_sys_sendmmsg net/socket.c:2578 [inline]
   __se_sys_sendmmsg net/socket.c:2575 [inline]
   __x64_sys_sendmmsg+0x99/0x100 net/socket.c:2575
   do_syscall_x64 arch/x86/entry/common.c:50 [inline]
   do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80
   entry_SYSCALL_64_after_hwframe+0x44/0xae

 -> (&f->f_owner.lock){.-.-}-{2:2} {
    IN-HARDIRQ-R at:
                      lock_acquire kernel/locking/lockdep.c:5637 [inline]
                      lock_acquire+0x1ab/0x510 kernel/locking/lockdep.c:5602
                      __raw_read_lock_irqsave include/linux/rwlock_api_smp.h:159 [inline]
                      _raw_read_lock_irqsave+0x45/0x90 kernel/locking/spinlock.c:236
                      send_sigio+0x24/0x380 fs/fcntl.c:796
                      kill_fasync_rcu fs/fcntl.c:1021 [inline]
                      kill_fasync fs/fcntl.c:1035 [inline]
                      kill_fasync+0x1f8/0x470 fs/fcntl.c:1028
                      perf_event_wakeup kernel/events/core.c:6434 [inline]
                      perf_pending_event+0x432/0x560 kernel/events/core.c:6517
                      irq_work_single+0x120/0x270 kernel/irq_work.c:211
                      irq_work_run_list+0x91/0xc0 kernel/irq_work.c:242
                      irq_work_run+0x54/0xd0 kernel/irq_work.c:251
                      __sysvec_irq_work+0x95/0x3d0 arch/x86/kernel/irq_work.c:22
                      sysvec_irq_work+0x8e/0xc0 arch/x86/kernel/irq_work.c:17
                      asm_sysvec_irq_work+0x12/0x20 arch/x86/include/asm/idtentry.h:664
                      preempt_count arch/x86/include/asm/preempt.h:27 [inline]
                      check_kcov_mode kernel/kcov.c:166 [inline]
                      __sanitizer_cov_trace_pc+0x7/0x60 kernel/kcov.c:200
                      tomoyo_domain_quota_is_ok+0x2f1/0x550 security/tomoyo/util.c:1093
                      tomoyo_supervisor+0x2f2/0xf00 security/tomoyo/common.c:2089
                      tomoyo_audit_path_log security/tomoyo/file.c:168 [inline]
                      tomoyo_path_permission security/tomoyo/file.c:587 [inline]
                      tomoyo_path_permission+0x270/0x3a0 security/tomoyo/file.c:573
                      tomoyo_check_open_permission+0x30f/0x380 security/tomoyo/file.c:780
                      tomoyo_file_open security/tomoyo/tomoyo.c:311 [inline]
                      tomoyo_file_open+0xa3/0xd0 security/tomoyo/tomoyo.c:306
                      security_file_open+0x45/0xb0 security/security.c:1635
                      do_dentry_open+0x353/0x1250 fs/open.c:809
                      do_open fs/namei.c:3426 [inline]
                      path_openat+0x1cad/0x2750 fs/namei.c:3559
                      do_filp_open+0x1aa/0x400 fs/namei.c:3586
                      do_sys_openat2+0x16d/0x4d0 fs/open.c:1212
                      do_sys_open fs/open.c:1228 [inline]
                      __do_sys_openat fs/open.c:1244 [inline]
                      __se_sys_openat fs/open.c:1239 [inline]
                      __x64_sys_openat+0x13f/0x1f0 fs/open.c:1239
                      do_syscall_x64 arch/x86/entry/common.c:50 [inline]
                      do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80
                      entry_SYSCALL_64_after_hwframe+0x44/0xae
    IN-SOFTIRQ-R at:
                      lock_acquire kernel/locking/lockdep.c:5637 [inline]
                      lock_acquire+0x1ab/0x510 kernel/locking/lockdep.c:5602
                      __raw_read_lock_irqsave include/linux/rwlock_api_smp.h:159 [inline]
                      _raw_read_lock_irqsave+0x45/0x90 kernel/locking/spinlock.c:236
                      send_sigio+0x24/0x380 fs/fcntl.c:796
                      kill_fasync_rcu fs/fcntl.c:1021 [inline]
                      kill_fasync fs/fcntl.c:1035 [inline]
                      kill_fasync+0x1f8/0x470 fs/fcntl.c:1028
                      perf_event_wakeup kernel/events/core.c:6434 [inline]
                      perf_pending_event+0x432/0x560 kernel/events/core.c:6517
                      irq_work_single+0x120/0x270 kernel/irq_work.c:211
                      irq_work_run_list+0x91/0xc0 kernel/irq_work.c:242
                      irq_work_run+0x54/0xd0 kernel/irq_work.c:251
                      __sysvec_irq_work+0x95/0x3d0 arch/x86/kernel/irq_work.c:22
                      sysvec_irq_work+0x40/0xc0 arch/x86/kernel/irq_work.c:17
                      asm_sysvec_irq_work+0x12/0x20 arch/x86/include/asm/idtentry.h:664
                      ffs arch/x86/include/asm/bitops.h:297 [inline]
                      __do_softirq+0x196/0x9c2 kernel/softirq.c:546
                      invoke_softirq kernel/softirq.c:432 [inline]
                      __irq_exit_rcu+0x123/0x180 kernel/softirq.c:636
                      irq_exit_rcu+0x5/0x20 kernel/softirq.c:648
                      sysvec_apic_timer_interrupt+0x93/0xc0 arch/x86/kernel/apic/apic.c:1097
                      asm_sysvec_apic_timer_interrupt+0x12/0x20 arch/x86/include/asm/idtentry.h:638
                      exit_to_user_mode_loop kernel/entry/common.c:162 [inline]
                      exit_to_user_mode_prepare+0x143/0x290 kernel/entry/common.c:207
                      irqentry_exit_to_user_mode+0x5/0x40 kernel/entry/common.c:313
                      asm_sysvec_apic_timer_interrupt+0x12/0x20 arch/x86/include/asm/idtentry.h:638
    INITIAL USE at:
                     lock_acquire kernel/locking/lockdep.c:5637 [inline]
                     lock_acquire+0x1ab/0x510 kernel/locking/lockdep.c:5602
                     __raw_write_lock_irq include/linux/rwlock_api_smp.h:194 [inline]
                     _raw_write_lock_irq+0x32/0x50 kernel/locking/spinlock.c:316
                     f_modown+0x2a/0x390 fs/fcntl.c:91
                     __f_setown fs/fcntl.c:110 [inline]
                     f_setown+0xd7/0x230 fs/fcntl.c:138
                     do_fcntl+0x749/0x1210 fs/fcntl.c:393
                     __do_sys_fcntl fs/fcntl.c:472 [inline]
                     __se_sys_fcntl fs/fcntl.c:457 [inline]
                     __x64_sys_fcntl+0x165/0x1e0 fs/fcntl.c:457
                     do_syscall_x64 arch/x86/entry/common.c:50 [inline]
                     do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80
                     entry_SYSCALL_64_after_hwframe+0x44/0xae
    INITIAL READ USE at:
                          lock_acquire kernel/locking/lockdep.c:5637 [inline]
                          lock_acquire+0x1ab/0x510 kernel/locking/lockdep.c:5602
                          __raw_read_lock_irqsave include/linux/rwlock_api_smp.h:159 [inline]
                          _raw_read_lock_irqsave+0x45/0x90 kernel/locking/spinlock.c:236
                          send_sigio+0x24/0x380 fs/fcntl.c:796
                          kill_fasync_rcu fs/fcntl.c:1021 [inline]
                          kill_fasync fs/fcntl.c:1035 [inline]
                          kill_fasync+0x1f8/0x470 fs/fcntl.c:1028
                          perf_event_wakeup kernel/events/core.c:6434 [inline]
                          perf_pending_event+0x432/0x560 kernel/events/core.c:6517
                          irq_work_single+0x120/0x270 kernel/irq_work.c:211
                          irq_work_run_list+0x91/0xc0 kernel/irq_work.c:242
                          irq_work_run+0x54/0xd0 kernel/irq_work.c:251
                          __sysvec_irq_work+0x95/0x3d0 arch/x86/kernel/irq_work.c:22
                          sysvec_irq_work+0x8e/0xc0 arch/x86/kernel/irq_work.c:17
                          asm_sysvec_irq_work+0x12/0x20 arch/x86/include/asm/idtentry.h:664
                          preempt_count arch/x86/include/asm/preempt.h:27 [inline]
                          check_kcov_mode kernel/kcov.c:166 [inline]
                          __sanitizer_cov_trace_pc+0x7/0x60 kernel/kcov.c:200
                          tomoyo_domain_quota_is_ok+0x2f1/0x550 security/tomoyo/util.c:1093
                          tomoyo_supervisor+0x2f2/0xf00 security/tomoyo/common.c:2089
                          tomoyo_audit_path_log security/tomoyo/file.c:168 [inline]
                          tomoyo_path_permission security/tomoyo/file.c:587 [inline]
                          tomoyo_path_permission+0x270/0x3a0 security/tomoyo/file.c:573
                          tomoyo_check_open_permission+0x30f/0x380 security/tomoyo/file.c:780
                          tomoyo_file_open security/tomoyo/tomoyo.c:311 [inline]
                          tomoyo_file_open+0xa3/0xd0 security/tomoyo/tomoyo.c:306
                          security_file_open+0x45/0xb0 security/security.c:1635
                          do_dentry_open+0x353/0x1250 fs/open.c:809
                          do_open fs/namei.c:3426 [inline]
                          path_openat+0x1cad/0x2750 fs/namei.c:3559
                          do_filp_open+0x1aa/0x400 fs/namei.c:3586
                          do_sys_openat2+0x16d/0x4d0 fs/open.c:1212
                          do_sys_open fs/open.c:1228 [inline]
                          __do_sys_openat fs/open.c:1244 [inline]
                          __se_sys_openat fs/open.c:1239 [inline]
                          __x64_sys_openat+0x13f/0x1f0 fs/open.c:1239
                          do_syscall_x64 arch/x86/entry/common.c:50 [inline]
                          do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80
                          entry_SYSCALL_64_after_hwframe+0x44/0xae
  }
  ... key      at: [<ffffffff90532de0>] __key.5+0x0/0x40
  ... acquired at:
   __raw_read_lock_irqsave include/linux/rwlock_api_smp.h:159 [inline]
   _raw_read_lock_irqsave+0x45/0x90 kernel/locking/spinlock.c:236
   send_sigio+0x24/0x380 fs/fcntl.c:796
   kill_fasync_rcu fs/fcntl.c:1021 [inline]
   kill_fasync fs/fcntl.c:1035 [inline]
   kill_fasync+0x1f8/0x470 fs/fcntl.c:1028
   perf_event_wakeup kernel/events/core.c:6434 [inline]
   perf_pending_event+0x432/0x560 kernel/events/core.c:6517
   irq_work_single+0x120/0x270 kernel/irq_work.c:211
   irq_work_run_list+0x91/0xc0 kernel/irq_work.c:242
   irq_work_run+0x54/0xd0 kernel/irq_work.c:251
   __sysvec_irq_work+0x95/0x3d0 arch/x86/kernel/irq_work.c:22
   sysvec_irq_work+0x8e/0xc0 arch/x86/kernel/irq_work.c:17
   asm_sysvec_irq_work+0x12/0x20 arch/x86/include/asm/idtentry.h:664
   preempt_count arch/x86/include/asm/preempt.h:27 [inline]
   check_kcov_mode kernel/kcov.c:166 [inline]
   __sanitizer_cov_trace_pc+0x7/0x60 kernel/kcov.c:200
   tomoyo_domain_quota_is_ok+0x2f1/0x550 security/tomoyo/util.c:1093
   tomoyo_supervisor+0x2f2/0xf00 security/tomoyo/common.c:2089
   tomoyo_audit_path_log security/tomoyo/file.c:168 [inline]
   tomoyo_path_permission security/tomoyo/file.c:587 [inline]
   tomoyo_path_permission+0x270/0x3a0 security/tomoyo/file.c:573
   tomoyo_check_open_permission+0x30f/0x380 security/tomoyo/file.c:780
   tomoyo_file_open security/tomoyo/tomoyo.c:311 [inline]
   tomoyo_file_open+0xa3/0xd0 security/tomoyo/tomoyo.c:306
   security_file_open+0x45/0xb0 security/security.c:1635
   do_dentry_open+0x353/0x1250 fs/open.c:809
   do_open fs/namei.c:3426 [inline]
   path_openat+0x1cad/0x2750 fs/namei.c:3559
   do_filp_open+0x1aa/0x400 fs/namei.c:3586
   do_sys_openat2+0x16d/0x4d0 fs/open.c:1212
   do_sys_open fs/open.c:1228 [inline]
   __do_sys_openat fs/open.c:1244 [inline]
   __se_sys_openat fs/open.c:1239 [inline]
   __x64_sys_openat+0x13f/0x1f0 fs/open.c:1239
   do_syscall_x64 arch/x86/entry/common.c:50 [inline]
   do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80
   entry_SYSCALL_64_after_hwframe+0x44/0xae

-> (&new->fa_lock){.-.-}-{2:2} {
   IN-HARDIRQ-R at:
                    lock_acquire kernel/locking/lockdep.c:5637 [inline]
                    lock_acquire+0x1ab/0x510 kernel/locking/lockdep.c:5602
                    __raw_read_lock_irqsave include/linux/rwlock_api_smp.h:159 [inline]
                    _raw_read_lock_irqsave+0x45/0x90 kernel/locking/spinlock.c:236
                    kill_fasync_rcu fs/fcntl.c:1014 [inline]
                    kill_fasync fs/fcntl.c:1035 [inline]
                    kill_fasync+0x136/0x470 fs/fcntl.c:1028
                    perf_event_wakeup kernel/events/core.c:6434 [inline]
                    perf_pending_event+0x432/0x560 kernel/events/core.c:6517
                    irq_work_single+0x120/0x270 kernel/irq_work.c:211
                    irq_work_run_list+0x91/0xc0 kernel/irq_work.c:242
                    irq_work_run+0x54/0xd0 kernel/irq_work.c:251
                    __sysvec_irq_work+0x95/0x3d0 arch/x86/kernel/irq_work.c:22
                    sysvec_irq_work+0x8e/0xc0 arch/x86/kernel/irq_work.c:17
                    asm_sysvec_irq_work+0x12/0x20 arch/x86/include/asm/idtentry.h:664
                    preempt_count arch/x86/include/asm/preempt.h:27 [inline]
                    check_kcov_mode kernel/kcov.c:166 [inline]
                    __sanitizer_cov_trace_pc+0x7/0x60 kernel/kcov.c:200
                    tomoyo_domain_quota_is_ok+0x2f1/0x550 security/tomoyo/util.c:1093
                    tomoyo_supervisor+0x2f2/0xf00 security/tomoyo/common.c:2089
                    tomoyo_audit_path_log security/tomoyo/file.c:168 [inline]
                    tomoyo_path_permission security/tomoyo/file.c:587 [inline]
                    tomoyo_path_permission+0x270/0x3a0 security/tomoyo/file.c:573
                    tomoyo_check_open_permission+0x30f/0x380 security/tomoyo/file.c:780
                    tomoyo_file_open security/tomoyo/tomoyo.c:311 [inline]
                    tomoyo_file_open+0xa3/0xd0 security/tomoyo/tomoyo.c:306
                    security_file_open+0x45/0xb0 security/security.c:1635
                    do_dentry_open+0x353/0x1250 fs/open.c:809
                    do_open fs/namei.c:3426 [inline]
                    path_openat+0x1cad/0x2750 fs/namei.c:3559
                    do_filp_open+0x1aa/0x400 fs/namei.c:3586
                    do_sys_openat2+0x16d/0x4d0 fs/open.c:1212
                    do_sys_open fs/open.c:1228 [inline]
                    __do_sys_openat fs/open.c:1244 [inline]
                    __se_sys_openat fs/open.c:1239 [inline]
                    __x64_sys_openat+0x13f/0x1f0 fs/open.c:1239
                    do_syscall_x64 arch/x86/entry/common.c:50 [inline]
                    do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80
                    entry_SYSCALL_64_after_hwframe+0x44/0xae
   IN-SOFTIRQ-R at:
                    lock_acquire kernel/locking/lockdep.c:5637 [inline]
                    lock_acquire+0x1ab/0x510 kernel/locking/lockdep.c:5602
                    __raw_read_lock_irqsave include/linux/rwlock_api_smp.h:159 [inline]
                    _raw_read_lock_irqsave+0x45/0x90 kernel/locking/spinlock.c:236
                    kill_fasync_rcu fs/fcntl.c:1014 [inline]
                    kill_fasync fs/fcntl.c:1035 [inline]
                    kill_fasync+0x136/0x470 fs/fcntl.c:1028
                    perf_event_wakeup kernel/events/core.c:6434 [inline]
                    perf_pending_event+0x432/0x560 kernel/events/core.c:6517
                    irq_work_single+0x120/0x270 kernel/irq_work.c:211
                    irq_work_run_list+0x91/0xc0 kernel/irq_work.c:242
                    irq_work_run+0x54/0xd0 kernel/irq_work.c:251
                    __sysvec_irq_work+0x95/0x3d0 arch/x86/kernel/irq_work.c:22
                    sysvec_irq_work+0x40/0xc0 arch/x86/kernel/irq_work.c:17
                    asm_sysvec_irq_work+0x12/0x20 arch/x86/include/asm/idtentry.h:664
                    ffs arch/x86/include/asm/bitops.h:297 [inline]
                    __do_softirq+0x196/0x9c2 kernel/softirq.c:546
                    invoke_softirq kernel/softirq.c:432 [inline]
                    __irq_exit_rcu+0x123/0x180 kernel/softirq.c:636
                    irq_exit_rcu+0x5/0x20 kernel/softirq.c:648
                    sysvec_apic_timer_interrupt+0x93/0xc0 arch/x86/kernel/apic/apic.c:1097
                    asm_sysvec_apic_timer_interrupt+0x12/0x20 arch/x86/include/asm/idtentry.h:638
                    exit_to_user_mode_loop kernel/entry/common.c:162 [inline]
                    exit_to_user_mode_prepare+0x143/0x290 kernel/entry/common.c:207
                    irqentry_exit_to_user_mode+0x5/0x40 kernel/entry/common.c:313
                    asm_sysvec_apic_timer_interrupt+0x12/0x20 arch/x86/include/asm/idtentry.h:638
   INITIAL USE at:
                   lock_acquire kernel/locking/lockdep.c:5637 [inline]
                   lock_acquire+0x1ab/0x510 kernel/locking/lockdep.c:5602
                   __raw_write_lock_irq include/linux/rwlock_api_smp.h:194 [inline]
                   _raw_write_lock_irq+0x32/0x50 kernel/locking/spinlock.c:316
                   fasync_remove_entry+0xb6/0x1f0 fs/fcntl.c:891
                   fasync_helper+0x9e/0xb0 fs/fcntl.c:994
                   __tty_fasync drivers/tty/tty_io.c:2241 [inline]
                   tty_fasync+0x17b/0x390 drivers/tty/tty_io.c:2274
                   __fput+0x846/0x9f0 fs/file_table.c:277
                   task_work_run+0xdd/0x1a0 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+0x27e/0x290 kernel/entry/common.c:207
                   __syscall_exit_to_user_mode_work kernel/entry/common.c:289 [inline]
                   syscall_exit_to_user_mode+0x19/0x60 kernel/entry/common.c:300
                   do_syscall_64+0x42/0xb0 arch/x86/entry/common.c:86
                   entry_SYSCALL_64_after_hwframe+0x44/0xae
   INITIAL READ USE at:
                        lock_acquire kernel/locking/lockdep.c:5637 [inline]
                        lock_acquire+0x1ab/0x510 kernel/locking/lockdep.c:5602
                        __raw_read_lock_irqsave include/linux/rwlock_api_smp.h:159 [inline]
                        _raw_read_lock_irqsave+0x45/0x90 kernel/locking/spinlock.c:236
                        kill_fasync_rcu fs/fcntl.c:1014 [inline]
                        kill_fasync fs/fcntl.c:1035 [inline]
                        kill_fasync+0x136/0x470 fs/fcntl.c:1028
                        perf_event_wakeup kernel/events/core.c:6434 [inline]
                        perf_pending_event+0x432/0x560 kernel/events/core.c:6517
                        irq_work_single+0x120/0x270 kernel/irq_work.c:211
                        irq_work_run_list+0x91/0xc0 kernel/irq_work.c:242
                        irq_work_run+0x54/0xd0 kernel/irq_work.c:251
                        __sysvec_irq_work+0x95/0x3d0 arch/x86/kernel/irq_work.c:22
                        sysvec_irq_work+0x8e/0xc0 arch/x86/kernel/irq_work.c:17
                        asm_sysvec_irq_work+0x12/0x20 arch/x86/include/asm/idtentry.h:664
                        preempt_count arch/x86/include/asm/preempt.h:27 [inline]
                        check_kcov_mode kernel/kcov.c:166 [inline]
                        __sanitizer_cov_trace_pc+0x7/0x60 kernel/kcov.c:200
                        tomoyo_domain_quota_is_ok+0x2f1/0x550 security/tomoyo/util.c:1093
                        tomoyo_supervisor+0x2f2/0xf00 security/tomoyo/common.c:2089
                        tomoyo_audit_path_log security/tomoyo/file.c:168 [inline]
                        tomoyo_path_permission security/tomoyo/file.c:587 [inline]
                        tomoyo_path_permission+0x270/0x3a0 security/tomoyo/file.c:573
                        tomoyo_check_open_permission+0x30f/0x380 security/tomoyo/file.c:780
                        tomoyo_file_open security/tomoyo/tomoyo.c:311 [inline]
                        tomoyo_file_open+0xa3/0xd0 security/tomoyo/tomoyo.c:306
                        security_file_open+0x45/0xb0 security/security.c:1635
                        do_dentry_open+0x353/0x1250 fs/open.c:809
                        do_open fs/namei.c:3426 [inline]
                        path_openat+0x1cad/0x2750 fs/namei.c:3559
                        do_filp_open+0x1aa/0x400 fs/namei.c:3586
                        do_sys_openat2+0x16d/0x4d0 fs/open.c:1212
                        do_sys_open fs/open.c:1228 [inline]
                        __do_sys_openat fs/open.c:1244 [inline]
                        __se_sys_openat fs/open.c:1239 [inline]
                        __x64_sys_openat+0x13f/0x1f0 fs/open.c:1239
                        do_syscall_x64 arch/x86/entry/common.c:50 [inline]
                        do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80
                        entry_SYSCALL_64_after_hwframe+0x44/0xae
 }
 ... key      at: [<ffffffff90533bc0>] __key.0+0x0/0x40
 ... acquired at:
   lock_acquire kernel/locking/lockdep.c:5637 [inline]
   lock_acquire+0x1ab/0x510 kernel/locking/lockdep.c:5602
   __raw_read_lock_irqsave include/linux/rwlock_api_smp.h:159 [inline]
   _raw_read_lock_irqsave+0x70/0x90 kernel/locking/spinlock.c:236
   kill_fasync_rcu fs/fcntl.c:1014 [inline]
   kill_fasync fs/fcntl.c:1035 [inline]
   kill_fasync+0x136/0x470 fs/fcntl.c:1028
   snd_timer_user_ccallback+0x298/0x330 sound/core/timer.c:1386
   snd_timer_notify1+0x11c/0x3b0 sound/core/timer.c:516
   snd_timer_start1+0x4d4/0x800 sound/core/timer.c:578
   snd_timer_start sound/core/timer.c:696 [inline]
   snd_timer_start sound/core/timer.c:689 [inline]
   snd_timer_user_start.isra.0+0x1e3/0x260 sound/core/timer.c:1984
   __snd_timer_user_ioctl.isra.0+0xda8/0x2490 sound/core/timer.c:2107
   snd_timer_user_ioctl+0x77/0xb0 sound/core/timer.c:2128
   vfs_ioctl fs/ioctl.c:51 [inline]
   __do_sys_ioctl fs/ioctl.c:874 [inline]
   __se_sys_ioctl fs/ioctl.c:860 [inline]
   __x64_sys_ioctl+0x193/0x200 fs/ioctl.c:860
   do_syscall_x64 arch/x86/entry/common.c:50 [inline]
   do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80
   entry_SYSCALL_64_after_hwframe+0x44/0xae


stack backtrace:
CPU: 0 PID: 20756 Comm: syz-executor.3 Not tainted 5.16.0-rc2-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Call Trace:
 <TASK>
 __dump_stack lib/dump_stack.c:88 [inline]
 dump_stack_lvl+0xcd/0x134 lib/dump_stack.c:106
 print_bad_irq_dependency kernel/locking/lockdep.c:2577 [inline]
 check_irq_usage.cold+0x4c1/0x6b0 kernel/locking/lockdep.c:2816
 check_prev_add kernel/locking/lockdep.c:3067 [inline]
 check_prevs_add kernel/locking/lockdep.c:3186 [inline]
 validate_chain kernel/locking/lockdep.c:3801 [inline]
 __lock_acquire+0x2a1f/0x54a0 kernel/locking/lockdep.c:5027
 lock_acquire kernel/locking/lockdep.c:5637 [inline]
 lock_acquire+0x1ab/0x510 kernel/locking/lockdep.c:5602
 __raw_read_lock_irqsave include/linux/rwlock_api_smp.h:159 [inline]
 _raw_read_lock_irqsave+0x70/0x90 kernel/locking/spinlock.c:236
 kill_fasync_rcu fs/fcntl.c:1014 [inline]
 kill_fasync fs/fcntl.c:1035 [inline]
 kill_fasync+0x136/0x470 fs/fcntl.c:1028
 snd_timer_user_ccallback+0x298/0x330 sound/core/timer.c:1386
 snd_timer_notify1+0x11c/0x3b0 sound/core/timer.c:516
 snd_timer_start1+0x4d4/0x800 sound/core/timer.c:578
 snd_timer_start sound/core/timer.c:696 [inline]
 snd_timer_start sound/core/timer.c:689 [inline]
 snd_timer_user_start.isra.0+0x1e3/0x260 sound/core/timer.c:1984
 __snd_timer_user_ioctl.isra.0+0xda8/0x2490 sound/core/timer.c:2107
 snd_timer_user_ioctl+0x77/0xb0 sound/core/timer.c:2128
 vfs_ioctl fs/ioctl.c:51 [inline]
 __do_sys_ioctl fs/ioctl.c:874 [inline]
 __se_sys_ioctl fs/ioctl.c:860 [inline]
 __x64_sys_ioctl+0x193/0x200 fs/ioctl.c:860
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x44/0xae
RIP: 0033:0x7f1799d36ae9
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:00007f17972ac188 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 00007f1799e49f60 RCX: 00007f1799d36ae9
RDX: 0000000000000000 RSI: 00000000000054a0 RDI: 0000000000000003
RBP: 00007f1799d90f6d R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007ffda878b0af R14: 00007f17972ac300 R15: 0000000000022000
 </TASK>
Crashes (13):
Manager	Time	Kernel	Commit	Syzkaller	Config	Log	Report	VM info	Title
ci-upstream-kasan-gce-root	2021/11/27 00:18	upstream	c5c17547b778	63eeac02	.config	log	report	info	possible deadlock in snd_timer_notify
ci-upstream-kasan-gce-root	2021/11/24 23:03	upstream	5f53fa508db0	545ab074	.config	log	report	info	possible deadlock in snd_timer_notify
ci-upstream-kasan-gce	2021/11/23 23:52	upstream	5d9f4cf36721	545ab074	.config	log	report	info	possible deadlock in snd_timer_notify
ci-upstream-kasan-gce	2021/11/23 07:14	upstream	136057256686	545ab074	.config	log	report	info	possible deadlock in snd_timer_notify
ci-upstream-kasan-gce-root	2021/11/22 12:12	upstream	136057256686	4eb20a4e	.config	log	report	info	possible deadlock in snd_timer_notify
ci-upstream-kasan-gce	2021/11/22 02:08	upstream	40c93d7fff6f	4eb20a4e	.config	log	report	info	possible deadlock in snd_timer_notify
ci-upstream-kasan-gce	2021/11/21 22:00	upstream	40c93d7fff6f	4eb20a4e	.config	log	report	info	possible deadlock in snd_timer_notify
ci-upstream-kasan-gce	2021/11/15 16:38	upstream	8ab774587903	83f5c9b5	.config	log	report	info	possible deadlock in snd_timer_notify
ci-upstream-kasan-gce-root	2021/11/14 01:43	upstream	ccfff0a2bd2a	83f5c9b5	.config	log	report	info	possible deadlock in snd_timer_notify
ci-upstream-kasan-gce-root	2021/11/13 05:25	upstream	7246f4dcaccc	83f5c9b5	.config	log	report	info	possible deadlock in snd_timer_notify
ci-upstream-kasan-gce-root	2021/11/11 11:45	upstream	debe436e77c7	75b04091	.config	log	report	info	possible deadlock in snd_timer_notify
ci-upstream-kasan-gce	2021/11/11 08:41	upstream	debe436e77c7	75b04091	.config	log	report	info	possible deadlock in snd_timer_notify
ci-upstream-kasan-gce-selinux-root	2021/11/10 19:08	upstream	89d714ab6043	75b04091	.config	log	report	info	possible deadlock in snd_timer_notify