INFO: rcu_sched detected stalls on CPUs/tasks:
	(detected by 0, t=125007 jiffies, g=15967, c=15966, q=10)
All QSes seen, last rcu_sched kthread activity 125014 (4294862807-4294737793), jiffies_till_next_fqs=3, root ->qsmask 0x0
syz-executor4   R  running task    24272 11836   3721 0x0000000c
Call Trace:
 <IRQ>
 sched_show_task+0x4a3/0x5e0 kernel/sched/core.c:5198
 print_other_cpu_stall+0x996/0x1090 kernel/rcu/tree.c:1564
 check_cpu_stall.isra.61+0x6e6/0x15b0 kernel/rcu/tree.c:1682
 __rcu_pending kernel/rcu/tree.c:3440 [inline]
 rcu_pending kernel/rcu/tree.c:3502 [inline]
 rcu_check_callbacks+0x256/0xd00 kernel/rcu/tree.c:2842
 update_process_times+0x30/0x60 kernel/time/timer.c:1628
 tick_sched_handle+0x85/0x160 kernel/time/tick-sched.c:162
 tick_sched_timer+0x42/0x120 kernel/time/tick-sched.c:1194
 __run_hrtimer kernel/time/hrtimer.c:1211 [inline]
 __hrtimer_run_queues+0x358/0xe20 kernel/time/hrtimer.c:1275
 hrtimer_interrupt+0x1c2/0x5e0 kernel/time/hrtimer.c:1309
 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1025 [inline]
 smp_apic_timer_interrupt+0x14a/0x700 arch/x86/kernel/apic/apic.c:1050
 apic_timer_interrupt+0xa9/0xb0 arch/x86/entry/entry_64.S:920
 </IRQ>
RIP: 0010:mulaw_decode+0x545/0x770 sound/core/oss/mulaw.c:193
RSP: 0018:ffff8801a76f77e0 EFLAGS: 00000286 ORIG_RAX: ffffffffffffff11
RAX: 000000000000008b RBX: ffffc90001258f74 RCX: 0000000000000000
RDX: 0000000000000002 RSI: ffff8801a76f78a2 RDI: ffffc90001336ee8
RBP: ffff8801a76f7908 R08: fffff52000266ddd R09: fffff52000266ddd
R10: 0000000000000001 R11: fffff52000266ddc R12: 0000000000000002
R13: ffff8801d577f000 R14: dffffc0000000000 R15: ffffc90001336ee6
 mulaw_transfer+0x222/0x270 sound/core/oss/mulaw.c:273
 snd_pcm_plug_write_transfer+0x22d/0x420 sound/core/oss/pcm_plugin.c:611
 snd_pcm_oss_write2+0x260/0x420 sound/core/oss/pcm_oss.c:1311
 snd_pcm_oss_write1 sound/core/oss/pcm_oss.c:1372 [inline]
 snd_pcm_oss_write+0x5fe/0x830 sound/core/oss/pcm_oss.c:2646
 do_loop_readv_writev fs/read_write.c:676 [inline]
 do_iter_write+0x3ca/0x540 fs/read_write.c:934
 vfs_writev+0x18a/0x340 fs/read_write.c:977
 do_writev+0xfc/0x2a0 fs/read_write.c:1012
 SYSC_writev fs/read_write.c:1085 [inline]
 SyS_writev+0x27/0x30 fs/read_write.c:1082
 entry_SYSCALL_64_fastpath+0x23/0x9a
RIP: 0033:0x452ac9
RSP: 002b:00007f5ab2456c58 EFLAGS: 00000212 ORIG_RAX: 0000000000000014
RAX: ffffffffffffffda RBX: 000000000071bf58 RCX: 0000000000452ac9
RDX: 0000000000000002 RSI: 00000000200a8000 RDI: 0000000000000015
RBP: 00000000000003a3 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000212 R12: 00000000006f37e8
R13: 00000000ffffffff R14: 00007f5ab24576d4 R15: 0000000000000000
rcu_sched kthread starved for 125618 jiffies! g15967 c15966 f0x2 RCU_GP_WAIT_FQS(3) ->state=0x0 ->cpu=0
rcu_sched       R  running task    23456     8      2 0x80000000
Call Trace:
 context_switch kernel/sched/core.c:2799 [inline]
 __schedule+0x8eb/0x2060 kernel/sched/core.c:3375
 schedule+0xf5/0x430 kernel/sched/core.c:3434
 schedule_timeout+0x118/0x230 kernel/time/timer.c:1793
 rcu_gp_kthread+0x9e5/0x1930 kernel/rcu/tree.c:2314
 kthread+0x33c/0x400 kernel/kthread.c:238
 ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:524