rcu: INFO: rcu_preempt self-detected stall on CPU
rcu: 	1-....: (1 GPs behind) idle=792c/1/0x4000000000000000 softirq=0/0 fqs=5084 rcuc=10567 jiffies(starved)
rcu: 	         hardirqs   softirqs   csw/system
rcu: 	 number:     6342        130          329
rcu: 	cputime:      147         32        52298   ==> 52490(ms)
rcu: 	(t=10500 jiffies g=35985 q=7313 ncpus=2)
CPU: 1 UID: 0 PID: 8384 Comm: syz.5.436 Tainted: G             L      syzkaller #0 PREEMPT_{RT,(full)} 
Tainted: [L]=SOFTLOCKUP
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/09/2026
RIP: 0010:rdtsc_ordered arch/x86/include/asm/tsc.h:57 [inline]
RIP: 0010:delay_tsc+0x71/0xc0 arch/x86/lib/delay.c:72
Code: 00 00 e8 82 b4 4e f6 65 8b 05 0b 1d 59 07 85 c0 74 1c f3 90 bf 01 00 00 00 e8 cb b2 4e f6 e8 e6 7d 01 00 39 c5 75 0e 0f 01 f9 <66> 90 eb bd e8 26 e2 ed f5 eb dd 4c 29 fb e8 cc 7d 01 00 89 c5 0f
RSP: 0018:ffffc900045dfab8 EFLAGS: 00000246
RAX: 000000009bf9e00c RBX: 00000000000055f3 RCX: 0000000000000001
RDX: 00000000000000fb RSI: ffffffff8bca9460 RDI: ffffffff8bca9420
RBP: 0000000000000001 R08: ffffffff8faf857f R09: 1ffffffff1f5f0af
R10: dffffc0000000000 R11: ffffffff8b4522d0 R12: ffff88803899b200
R13: ffff88803899b210 R14: 000000fb9bf99f30 R15: 000000000000406e
FS:  00005555678ad500(0000) GS:ffff888125d3c000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000055a68e437ce0 CR3: 0000000071846000 CR4: 00000000003526f0
Call Trace:
 <TASK>
 udelay include/asm-generic/delay.h:62 [inline]
 snd_timer_close_locked+0x435/0xbd0 sound/core/timer.c:497
 snd_timer_close+0x44/0xc0 sound/core/timer.c:529
 snd_seq_timer_close+0x8a/0xc0 sound/core/seq/seq_timer.c:322
 queue_delete sound/core/seq/seq_queue.c:126 [inline]
 snd_seq_queue_delete+0x8d/0xf0 sound/core/seq/seq_queue.c:188
 delete_seq_queue sound/core/seq/oss/seq_oss_init.c:371 [inline]
 snd_seq_oss_release+0x1e9/0x330 sound/core/seq/oss/seq_oss_init.c:416
 odev_release+0x56/0x80 sound/core/seq/oss/seq_oss.c:141
 __fput+0x42a/0xa80 fs/file_table.c:512
 task_work_run+0x1d9/0x270 kernel/task_work.c:233
 resume_user_mode_work include/linux/resume_user_mode.h:50 [inline]
 __exit_to_user_mode_loop kernel/entry/common.c:70 [inline]
 exit_to_user_mode_loop+0x1fa/0x730 kernel/entry/common.c:101
 __exit_to_user_mode_prepare include/linux/irq-entry-common.h:207 [inline]
 syscall_exit_to_user_mode_prepare include/linux/irq-entry-common.h:230 [inline]
 syscall_exit_to_user_mode include/linux/entry-common.h:339 [inline]
 do_syscall_64+0x33d/0x530 arch/x86/entry/syscall_64.c:89
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fc5da1dde99
Code: ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 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 e8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007ffed1fee598 EFLAGS: 00000246 ORIG_RAX: 00000000000001b4
RAX: 0000000000000000 RBX: 00007fc5da467da0 RCX: 00007fc5da1dde99
RDX: 0000000000000000 RSI: 000000000000001e RDI: 0000000000000003
RBP: 00007fc5da467da0 R08: 0000000000000006 R09: 0000000000000000
R10: 00007fc5da467cb0 R11: 0000000000000246 R12: 000000000005c37f
R13: 00007fc5da46618c R14: 000000000005c26c R15: 00007fc5da466180
 </TASK>