possible deadlock in _snd_pcm_stream_lock

possible deadlock in _snd_pcm_stream_lock_irqsave (3)
Status: upstream: reported on 2021/11/10 17:00
Reported-by: syzbot+58740f570d9b0dacf2a3@syzkaller.appspotmail.com
First crash: 26d, last: 14h20m

similar bugs (2):
Kernel	Title	Repro	Cause bisect	Fix bisect	Count	Last	Reported	Patched	Status
upstream	possible deadlock in _snd_pcm_stream_lock_irqsave	C	done		997	416d	453d	17/22	fixed on 2020/11/16 12:12
upstream	possible deadlock in _snd_pcm_stream_lock_irqsave (2)				120	28d	135d	22/22	fixed on 2021/11/10 00:50

Sample crash report:

=====================================================
WARNING: SOFTIRQ-safe -> SOFTIRQ-unsafe lock order detected
5.16.0-rc4-syzkaller #0 Not tainted
-----------------------------------------------------
syz-executor.3/29860 [HC0[0]:SC0[0]:HE0:SE1] is trying to acquire:
ffffffff8b80a098 (tasklist_lock){.+.+}-{2:2}, at: send_sigio+0xab/0x380 fs/fcntl.c:810

and this task is already holding:
ffff8880425ce638 (&f->f_owner.lock){....}-{2:2}, at: send_sigio+0x24/0x380 fs/fcntl.c:796
which would create a new lock dependency:
 (&f->f_owner.lock){....}-{2:2} -> (tasklist_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 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_pcm_stream_lock_irqsave+0x9f/0xd0 sound/core/pcm_native.c:170
  snd_pcm_period_elapsed+0x1d/0x50 sound/core/pcm_lib.c:1848
  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:637
  irq_exit_rcu+0x5/0x20 kernel/softirq.c:649
  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
  __sanitizer_cov_trace_cmp4+0xc/0x70 kernel/kcov.c:261
  get_next_corpse net/netfilter/nf_conntrack_core.c:2268 [inline]
  nf_ct_iterate_cleanup+0x8b/0x350 net/netfilter/nf_conntrack_core.c:2317
  nf_ct_iterate_cleanup_net net/netfilter/nf_conntrack_core.c:2401 [inline]
  nf_ct_iterate_cleanup_net+0x234/0x400 net/netfilter/nf_conntrack_core.c:2385
  iterate_cleanup_work+0x65/0x170 net/netfilter/nf_nat_masquerade.c:83
  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

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:
  &group->lock --> &f->f_owner.lock --> tasklist_lock

 Possible interrupt unsafe locking scenario:

       CPU0                    CPU1
       ----                    ----
  lock(tasklist_lock);
                               local_irq_disable();
                               lock(&group->lock);
                               lock(&f->f_owner.lock);
  <Interrupt>
    lock(&group->lock);

 *** DEADLOCK ***

5 locks held by syz-executor.3/29860:
 #0: ffffffff8bb83d20 (rcu_read_lock){....}-{1:2}, at: sock_def_readable+0x0/0x4e0 include/trace/events/sock.h:204
 #1: ffffffff8bb83d20 (rcu_read_lock){....}-{1:2}, at: rcu_read_unlock include/linux/rcupdate.h:717 [inline]
 #1: ffffffff8bb83d20 (rcu_read_lock){....}-{1:2}, at: sock_def_readable+0x2aa/0x4e0 net/core/sock.c:3139
 #2: ffffffff8bb83d20 (rcu_read_lock){....}-{1:2}, at: kill_fasync+0x41/0x470 fs/fcntl.c:1033
 #3: ffff88806c8e5558 (&new->fa_lock){....}-{2:2}, at: kill_fasync_rcu fs/fcntl.c:1014 [inline]
 #3: ffff88806c8e5558 (&new->fa_lock){....}-{2:2}, at: kill_fasync fs/fcntl.c:1035 [inline]
 #3: ffff88806c8e5558 (&new->fa_lock){....}-{2:2}, at: kill_fasync+0x136/0x470 fs/fcntl.c:1028
 #4: ffff8880425ce638 (&f->f_owner.lock){....}-{2:2}, at: send_sigio+0x24/0x380 fs/fcntl.c:796

the dependencies between SOFTIRQ-irq-safe lock and the holding lock:
   -> (&group->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_pcm_stream_lock_irqsave+0x9f/0xd0 sound/core/pcm_native.c:170
                          snd_pcm_period_elapsed+0x1d/0x50 sound/core/pcm_lib.c:1848
                          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:637
                          irq_exit_rcu+0x5/0x20 kernel/softirq.c:649
                          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
                          __sanitizer_cov_trace_cmp4+0xc/0x70 kernel/kcov.c:261
                          get_next_corpse net/netfilter/nf_conntrack_core.c:2268 [inline]
                          nf_ct_iterate_cleanup+0x8b/0x350 net/netfilter/nf_conntrack_core.c:2317
                          nf_ct_iterate_cleanup_net net/netfilter/nf_conntrack_core.c:2401 [inline]
                          nf_ct_iterate_cleanup_net+0x234/0x400 net/netfilter/nf_conntrack_core.c:2385
                          iterate_cleanup_work+0x65/0x170 net/netfilter/nf_nat_masquerade.c:83
                          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_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_group_lock_irq sound/core/pcm_native.c:97 [inline]
                         snd_pcm_stream_lock_irq+0x8e/0xb0 sound/core/pcm_native.c:136
                         snd_pcm_oss_poll+0x2c3/0xb10 sound/core/oss/pcm_oss.c:2848
                         vfs_poll include/linux/poll.h:90 [inline]
                         do_select+0x8cb/0x16a0 fs/select.c:534
                         core_sys_select+0x3c2/0x9c0 fs/select.c:677
                         do_pselect.constprop.0+0x17b/0x1c0 fs/select.c:759
                         __do_sys_pselect6 fs/select.c:800 [inline]
                         __se_sys_pselect6 fs/select.c:791 [inline]
                         __x64_sys_pselect6+0x1c5/0x2b0 fs/select.c:791
                         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: [<ffffffff90832d60>] __key.9+0x0/0x40
  -> (&timer->lock){....}-{2:2} {
     INITIAL USE 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_start+0x24a/0x310 sound/core/pcm_native.c:1392
                       snd_pcm_action_single sound/core/pcm_native.c:1229 [inline]
                       snd_pcm_action+0x143/0x170 sound/core/pcm_native.c:1310
                       snd_pcm_action_lock_irq+0x9f/0x190 sound/core/pcm_native.c:1325
                       snd_pcm_start_lock_irq sound/core/pcm_native.c:1418 [inline]
                       snd_pcm_kernel_ioctl+0x12e/0x310 sound/core/pcm_native.c:3378
                       snd_pcm_oss_set_trigger.isra.0+0x2d5/0x6e0 sound/core/oss/pcm_oss.c:2123
                       snd_pcm_oss_poll+0x661/0xb10 sound/core/oss/pcm_oss.c:2859
                       vfs_poll include/linux/poll.h:90 [inline]
                       do_select+0x8cb/0x16a0 fs/select.c:534
                       core_sys_select+0x3c2/0x9c0 fs/select.c:677
                       do_pselect.constprop.0+0x17b/0x1c0 fs/select.c:759
                       __do_sys_pselect6 fs/select.c:800 [inline]
                       __se_sys_pselect6 fs/select.c:791 [inline]
                       __x64_sys_pselect6+0x1c5/0x2b0 fs/select.c:791
                       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: [<ffffffff90832500>] __key.12+0x0/0x40
   ... acquired at:
   __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_start+0x24a/0x310 sound/core/pcm_native.c:1392
   snd_pcm_action_single sound/core/pcm_native.c:1229 [inline]
   snd_pcm_action+0x143/0x170 sound/core/pcm_native.c:1310
   snd_pcm_action_lock_irq+0x9f/0x190 sound/core/pcm_native.c:1325
   snd_pcm_start_lock_irq sound/core/pcm_native.c:1418 [inline]
   snd_pcm_kernel_ioctl+0x12e/0x310 sound/core/pcm_native.c:3378
   snd_pcm_oss_set_trigger.isra.0+0x2d5/0x6e0 sound/core/oss/pcm_oss.c:2123
   snd_pcm_oss_poll+0x661/0xb10 sound/core/oss/pcm_oss.c:2859
   vfs_poll include/linux/poll.h:90 [inline]
   do_select+0x8cb/0x16a0 fs/select.c:534
   core_sys_select+0x3c2/0x9c0 fs/select.c:677
   do_pselect.constprop.0+0x17b/0x1c0 fs/select.c:759
   __do_sys_pselect6 fs/select.c:800 [inline]
   __se_sys_pselect6 fs/select.c:791 [inline]
   __x64_sys_pselect6+0x1c5/0x2b0 fs/select.c:791
   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} {
    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
                     sock_fasync+0x94/0x140 net/socket.c:1339
                     __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+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
                          lease_break_callback+0x1f/0x30 fs/locks.c:477
                          __break_lease+0x3d7/0x1420 fs/locks.c:1450
                          break_lease include/linux/fs.h:2633 [inline]
                          break_lease include/linux/fs.h:2623 [inline]
                          do_dentry_open+0x453/0x1250 fs/open.c:813
                          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_open fs/open.c:1236 [inline]
                          __se_sys_open fs/open.c:1232 [inline]
                          __x64_sys_open+0x119/0x1c0 fs/open.c:1232
                          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: [<ffffffff90534bc0>] __key.0+0x0/0x40
  ... acquired at:
   __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

-> (&f->f_owner.lock){....}-{2:2} {
   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
                   fcntl_dirnotify+0x7c9/0xbc0 fs/notify/dnotify/dnotify.c:351
                   do_fcntl+0x269/0x1210 fs/fcntl.c:422
                   __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_irq include/linux/rwlock_api_smp.h:168 [inline]
                        _raw_read_lock_irq+0x63/0x80 kernel/locking/spinlock.c:244
                        f_getown+0x23/0x2a0 fs/fcntl.c:154
                        do_fcntl+0xbd8/0x1210 fs/fcntl.c:389
                        __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
 }
 ... key      at: [<ffffffff90533de0>] __key.5+0x0/0x40
 ... acquired at:
   __raw_read_lock_irqsave include/linux/rwlock_api_smp.h:159 [inline]
   _raw_read_lock_irqsave+0x70/0x90 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
   lease_break_callback+0x1f/0x30 fs/locks.c:477
   __break_lease+0x3d7/0x1420 fs/locks.c:1450
   break_lease include/linux/fs.h:2633 [inline]
   break_lease include/linux/fs.h:2623 [inline]
   do_dentry_open+0x453/0x1250 fs/open.c:813
   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_open fs/open.c:1236 [inline]
   __se_sys_open fs/open.c:1232 [inline]
   __x64_sys_open+0x119/0x1c0 fs/open.c:1232
   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


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:
   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
   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:2413 [inline]
   sk_wake_async include/net/sock.h:2409 [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


stack backtrace:
CPU: 1 PID: 29860 Comm: syz-executor.3 Not tainted 5.16.0-rc4-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 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:2413 [inline]
 sk_wake_async include/net/sock.h:2409 [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
RIP: 0033:0x7f8998475ae9
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:00007f89973eb188 EFLAGS: 00000246 ORIG_RAX: 0000000000000133
RAX: ffffffffffffffda RBX: 00007f8998588f60 RCX: 00007f8998475ae9
RDX: 0307017fdb7a66cb RSI: 0000000020002dc0 RDI: 000000000000000f
RBP: 00007f89984cfff7 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000003ec0 R11: 0000000000000246 R12: 0000000000000000
R13: 00007fff8a21cf2f R14: 00007f89973eb300 R15: 0000000000022000
 </TASK>

Crashes (26):
Manager	Time	Kernel	Commit	Syzkaller	Config	Log	Report	VM info	Title
ci-upstream-kasan-gce-root	2021/12/06 12:34	upstream	0fcfb00b28c0	579a8754	.config	log	report	info	possible deadlock in _snd_pcm_stream_lock_irqsave
ci-upstream-kasan-gce	2021/12/04 16:27	upstream	12119cfa1052	a617004c	.config	log	report	info	possible deadlock in _snd_pcm_stream_lock_irqsave
ci-upstream-kasan-gce-root	2021/12/03 12:17	upstream	5f58da2befa5	c7c20675	.config	log	report	info	possible deadlock in _snd_pcm_stream_lock_irqsave
ci-upstream-kasan-gce	2021/12/03 10:21	upstream	5f58da2befa5	61f86278	.config	log	report	info	possible deadlock in _snd_pcm_stream_lock_irqsave
ci-upstream-kasan-gce	2021/12/02 21:34	upstream	a51e3ac43ddb	61f86278	.config	log	report	info	possible deadlock in _snd_pcm_stream_lock_irqsave
ci-upstream-kasan-gce	2021/11/29 16:48	upstream	d58071a8a76d	d0830353	.config	log	report	info	possible deadlock in _snd_pcm_stream_lock_irqsave
ci-upstream-kasan-gce	2021/11/28 11:43	upstream	3498e7f2bb41	63eeac02	.config	log	report	info	possible deadlock in _snd_pcm_stream_lock_irqsave
ci-upstream-kasan-gce-root	2021/11/26 19:21	upstream	a4849f6000e2	63eeac02	.config	log	report	info	possible deadlock in _snd_pcm_stream_lock_irqsave
ci-upstream-kasan-gce	2021/11/25 20:19	upstream	b501b85957de	63eeac02	.config	log	report	info	possible deadlock in _snd_pcm_stream_lock_irqsave
ci-upstream-kasan-gce	2021/11/25 18:24	upstream	5f53fa508db0	63eeac02	.config	log	report	info	possible deadlock in _snd_pcm_stream_lock_irqsave
ci-upstream-kasan-gce-root	2021/11/23 21:17	upstream	136057256686	545ab074	.config	log	report	info	possible deadlock in _snd_pcm_stream_lock_irqsave
ci-upstream-kasan-gce	2021/11/22 19:07	upstream	136057256686	545ab074	.config	log	report	info	possible deadlock in _snd_pcm_stream_lock_irqsave
ci-upstream-kasan-gce-selinux-root	2021/11/22 14:30	upstream	136057256686	545ab074	.config	log	report	info	possible deadlock in _snd_pcm_stream_lock_irqsave
ci-upstream-kasan-gce-root	2021/11/21 08:41	upstream	923dcc5eb0c1	4eb20a4e	.config	log	report	info	possible deadlock in _snd_pcm_stream_lock_irqsave
ci-upstream-kasan-gce-root	2021/11/21 06:51	upstream	923dcc5eb0c1	4eb20a4e	.config	log	report	info	possible deadlock in _snd_pcm_stream_lock_irqsave
ci-upstream-kasan-gce	2021/11/20 11:10	upstream	a90af8f15bdc	3a9d0024	.config	log	report	info	possible deadlock in _snd_pcm_stream_lock_irqsave
ci-upstream-kasan-gce-root	2021/11/17 19:28	upstream	ee1703cda8dc	cafff8b6	.config	log	report	info	possible deadlock in _snd_pcm_stream_lock_irqsave
ci-upstream-kasan-gce-root	2021/11/15 16:35	upstream	8ab774587903	83f5c9b5	.config	log	report	info	possible deadlock in _snd_pcm_stream_lock_irqsave
ci-upstream-kasan-gce	2021/11/14 15:35	upstream	c8c109546a19	83f5c9b5	.config	log	report	info	possible deadlock in _snd_pcm_stream_lock_irqsave
ci-upstream-kasan-gce-selinux-root	2021/11/14 10:53	upstream	c8c109546a19	83f5c9b5	.config	log	report	info	possible deadlock in _snd_pcm_stream_lock_irqsave
ci-upstream-kasan-gce	2021/11/13 11:19	upstream	66f4beaa6c1d	83f5c9b5	.config	log	report	info	possible deadlock in _snd_pcm_stream_lock_irqsave
ci-upstream-kasan-gce-root	2021/11/12 16:25	upstream	5833291ab6de	83f5c9b5	.config	log	report	info	possible deadlock in _snd_pcm_stream_lock_irqsave
ci-upstream-kasan-gce-selinux-root	2021/11/12 13:18	upstream	5833291ab6de	75b04091	.config	log	report	info	possible deadlock in _snd_pcm_stream_lock_irqsave
ci-upstream-kasan-gce	2021/11/12 01:42	upstream	5833291ab6de	75b04091	.config	log	report	info	possible deadlock in _snd_pcm_stream_lock_irqsave
ci-upstream-kasan-gce-root	2021/11/11 22:02	upstream	debe436e77c7	75b04091	.config	log	report	info	possible deadlock in _snd_pcm_stream_lock_irqsave
ci-upstream-kasan-gce-root	2021/11/10 03:43	upstream	cb690f5238d7	55fa030c	.config	log	report	info	possible deadlock in _snd_pcm_stream_lock_irqsave