================================
WARNING: inconsistent lock state
6.8.0-syzkaller-08951-gfe46a7dd189e #0 Not tainted
--------------------------------
inconsistent {SOFTIRQ-ON-W} -> {IN-SOFTIRQ-W} usage.
kworker/u8:4/61 [HC0[0]:SC1[1]:HE0:SE0] takes:
ffff888029e5b148 (&timer->lock){+.?.}-{2:2}, at: class_spinlock_irqsave_constructor include/linux/spinlock.h:574 [inline]
ffff888029e5b148 (&timer->lock){+.?.}-{2:2}, at: snd_timer_interrupt.part.0+0x31/0xd80 sound/core/timer.c:818
{SOFTIRQ-ON-W} state was registered at:
  lock_acquire kernel/locking/lockdep.c:5754 [inline]
  lock_acquire+0x1b1/0x540 kernel/locking/lockdep.c:5719
  __raw_spin_lock include/linux/spinlock_api_smp.h:133 [inline]
  _raw_spin_lock+0x2e/0x40 kernel/locking/spinlock.c:154
  spin_lock include/linux/spinlock.h:351 [inline]
  class_spinlock_constructor include/linux/spinlock.h:561 [inline]
  snd_timer_close_locked+0x65/0xbd0 sound/core/timer.c:412
  snd_timer_close+0x8b/0xf0 sound/core/timer.c:464
  snd_seq_timer_close+0xa4/0x100 sound/core/seq/seq_timer.c:302
  queue_delete+0x49/0xa0 sound/core/seq/seq_queue.c:126
  snd_seq_queue_delete+0x45/0x60 sound/core/seq/seq_queue.c:188
  snd_seq_kernel_client_ctl+0x107/0x1c0 sound/core/seq/seq_clientmgr.c:2526
  delete_seq_queue.isra.0+0xc8/0x150 sound/core/seq/oss/seq_oss_init.c:371
  odev_release+0x52/0x80 sound/core/seq/oss/seq_oss.c:144
  __fput+0x270/0xb80 fs/file_table.c:422
  __fput_sync+0x47/0x50 fs/file_table.c:507
  __do_sys_close fs/open.c:1556 [inline]
  __se_sys_close fs/open.c:1541 [inline]
  __x64_sys_close+0x86/0x100 fs/open.c:1541
  do_syscall_x64 arch/x86/entry/common.c:52 [inline]
  do_syscall_64+0xd2/0x260 arch/x86/entry/common.c:83
  entry_SYSCALL_64_after_hwframe+0x6d/0x75
irq event stamp: 2147779
hardirqs last  enabled at (2147778): [<ffffffff8ad60263>] __raw_spin_unlock_irq include/linux/spinlock_api_smp.h:159 [inline]
hardirqs last  enabled at (2147778): [<ffffffff8ad60263>] _raw_spin_unlock_irq+0x23/0x50 kernel/locking/spinlock.c:202
hardirqs last disabled at (2147779): [<ffffffff8ad60002>] __raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:108 [inline]
hardirqs last disabled at (2147779): [<ffffffff8ad60002>] _raw_spin_lock_irqsave+0x52/0x60 kernel/locking/spinlock.c:162
softirqs last  enabled at (2147628): [<ffffffff8ad63156>] softirq_handle_end kernel/softirq.c:400 [inline]
softirqs last  enabled at (2147628): [<ffffffff8ad63156>] __do_softirq+0x596/0x8de kernel/softirq.c:583
softirqs last disabled at (2147775): [<ffffffff8151a149>] invoke_softirq kernel/softirq.c:428 [inline]
softirqs last disabled at (2147775): [<ffffffff8151a149>] __irq_exit_rcu kernel/softirq.c:633 [inline]
softirqs last disabled at (2147775): [<ffffffff8151a149>] irq_exit_rcu+0xb9/0x120 kernel/softirq.c:645

other info that might help us debug this:
 Possible unsafe locking scenario:

       CPU0
       ----
  lock(&timer->lock);
  <Interrupt>
    lock(&timer->lock);

 *** DEADLOCK ***

4 locks held by kworker/u8:4/61:
 #0: ffff888015ed3148 ((wq_completion)netns){+.+.}-{0:0}, at: process_one_work+0x1296/0x1a60 kernel/workqueue.c:3229
 #1: ffffc900015d7d80 (net_cleanup_work){+.+.}-{0:0}, at: process_one_work+0x906/0x1a60 kernel/workqueue.c:3230
 #2: ffffffff8f2e1650 (pernet_ops_rwsem){++++}-{3:3}, at: cleanup_net+0xbb/0xbf0 net/core/net_namespace.c:591
 #3: ffffc90000a08cb0 ((&priv->tlist)){+.-.}-{0:0}, at: call_timer_fn+0x11a/0x5b0 kernel/time/timer.c:1789

stack backtrace:
CPU: 1 PID: 61 Comm: kworker/u8:4 Not tainted 6.8.0-syzkaller-08951-gfe46a7dd189e #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/27/2024
Workqueue: netns cleanup_net
Call Trace:
 <IRQ>
 __dump_stack lib/dump_stack.c:88 [inline]
 dump_stack_lvl+0x116/0x1f0 lib/dump_stack.c:114
 print_usage_bug kernel/locking/lockdep.c:3971 [inline]
 valid_state kernel/locking/lockdep.c:4013 [inline]
 mark_lock_irq kernel/locking/lockdep.c:4216 [inline]
 mark_lock+0x923/0xc60 kernel/locking/lockdep.c:4678
 mark_usage kernel/locking/lockdep.c:4567 [inline]
 __lock_acquire+0x13d4/0x3b30 kernel/locking/lockdep.c:5091
 lock_acquire kernel/locking/lockdep.c:5754 [inline]
 lock_acquire+0x1b1/0x540 kernel/locking/lockdep.c:5719
 __raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:110 [inline]
 _raw_spin_lock_irqsave+0x3a/0x60 kernel/locking/spinlock.c:162
 class_spinlock_irqsave_constructor include/linux/spinlock.h:574 [inline]
 snd_timer_interrupt.part.0+0x31/0xd80 sound/core/timer.c:818
 snd_timer_interrupt sound/core/timer.c:1107 [inline]
 snd_timer_s_function+0x14f/0x200 sound/core/timer.c:1107
 call_timer_fn+0x1a0/0x5b0 kernel/time/timer.c:1792
 expire_timers kernel/time/timer.c:1843 [inline]
 __run_timers+0x74b/0xab0 kernel/time/timer.c:2408
 __run_timer_base kernel/time/timer.c:2419 [inline]
 __run_timer_base kernel/time/timer.c:2412 [inline]
 run_timer_base+0x111/0x190 kernel/time/timer.c:2428
 run_timer_softirq+0x1a/0x40 kernel/time/timer.c:2438
 __do_softirq+0x218/0x8de kernel/softirq.c:554
 invoke_softirq kernel/softirq.c:428 [inline]
 __irq_exit_rcu kernel/softirq.c:633 [inline]
 irq_exit_rcu+0xb9/0x120 kernel/softirq.c:645
 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1043 [inline]
 sysvec_apic_timer_interrupt+0x95/0xb0 arch/x86/kernel/apic/apic.c:1043
 </IRQ>
 <TASK>
 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:702
RIP: 0010:__sanitizer_cov_trace_pc+0x58/0x60 kernel/kcov.c:225
Code: 82 f0 15 00 00 83 f8 02 75 20 48 8b 8a f8 15 00 00 8b 92 f4 15 00 00 48 8b 01 48 83 c0 01 48 39 d0 73 07 48 89 01 48 89 34 c1 <c3> cc cc cc cc 0f 1f 00 90 90 90 90 90 90 90 90 90 90 90 90 90 90
RSP: 0018:ffffc900015d7ab0 EFLAGS: 00000293
RAX: 0000000000000000 RBX: 000000000007ffff RCX: ffffffff893ae2e1
RDX: ffff8880173b1e00 RSI: ffffffff893ade2f RDI: 0000000000000004
RBP: dffffc0000000000 R08: 0000000000000004 R09: 000000000007ffff
R10: 000000000006b42c R11: 0000000000000003 R12: ffff88802eae4010
R13: 000000000006b42c R14: ffff88802eae4000 R15: 000000000006b42b
 inet_twsk_purge+0xef/0x910 net/ipv4/inet_timewait_sock.c:276
 ops_exit_list+0x128/0x180 net/core/net_namespace.c:175
 cleanup_net+0x5b7/0xbf0 net/core/net_namespace.c:637
 process_one_work+0x9a9/0x1a60 kernel/workqueue.c:3254
 process_scheduled_works kernel/workqueue.c:3335 [inline]
 worker_thread+0x6c8/0xf70 kernel/workqueue.c:3416
 kthread+0x2c1/0x3a0 kernel/kthread.c:388
 ret_from_fork+0x45/0x80 arch/x86/kernel/process.c:147
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:243
 </TASK>
----------------
Code disassembly (best guess), 1 bytes skipped:
   0:	f0 15 00 00 83 f8    	lock adc $0xf8830000,%eax
   6:	02 75 20             	add    0x20(%rbp),%dh
   9:	48 8b 8a f8 15 00 00 	mov    0x15f8(%rdx),%rcx
  10:	8b 92 f4 15 00 00    	mov    0x15f4(%rdx),%edx
  16:	48 8b 01             	mov    (%rcx),%rax
  19:	48 83 c0 01          	add    $0x1,%rax
  1d:	48 39 d0             	cmp    %rdx,%rax
  20:	73 07                	jae    0x29
  22:	48 89 01             	mov    %rax,(%rcx)
  25:	48 89 34 c1          	mov    %rsi,(%rcx,%rax,8)
* 29:	c3                   	ret <-- trapping instruction
  2a:	cc                   	int3
  2b:	cc                   	int3
  2c:	cc                   	int3
  2d:	cc                   	int3
  2e:	0f 1f 00             	nopl   (%rax)
  31:	90                   	nop
  32:	90                   	nop
  33:	90                   	nop
  34:	90                   	nop
  35:	90                   	nop
  36:	90                   	nop
  37:	90                   	nop
  38:	90                   	nop
  39:	90                   	nop
  3a:	90                   	nop
  3b:	90                   	nop
  3c:	90                   	nop
  3d:	90                   	nop
  3e:	90                   	nop