rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: 	0-...!: (0 ticks this GP) idle=ea6/1/0x4000000000000000 softirq=26672/26672 fqs=43 
	(detected by 1, t=10502 jiffies, g=43217, q=247)
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 PID: 14502 Comm: syz-executor.3 Not tainted 5.8.0-rc3-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
RIP: 0010:debug_spin_unlock kernel/locking/spinlock_debug.c:100 [inline]
RIP: 0010:do_raw_spin_unlock+0xc5/0x230 kernel/locking/spinlock_debug.c:138
Code: 3c 02 00 0f 85 65 01 00 00 65 48 8b 04 25 00 ff 01 00 48 39 45 10 0f 85 d6 00 00 00 4c 8d 65 08 48 b8 00 00 00 00 00 fc ff df <4c> 89 e2 48 c1 ea 03 0f b6 04 02 84 c0 74 08 3c 03 0f 8e fc 00 00
RSP: 0018:ffffc90000007d48 EFLAGS: 00000046
RAX: dffffc0000000000 RBX: ffff8880a718fb40 RCX: ffffffff815aff60
RDX: 1ffff11014e31f5f RSI: 0000000000000004 RDI: ffff8880a718fae8
RBP: ffff8880a718fae8 R08: 0000000000000000 R09: ffff8880a718faeb
R10: ffffed1014e31f5d R11: 0000000000000000 R12: ffff8880a718faf0
R13: ffff8880a718faf8 R14: ffff8880a6f438a0 R15: 16db2ca2adb65945
FS:  00007f460e907700(0000) GS:ffff8880ae600000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000001b33b25000 CR3: 00000000906fd000 CR4: 00000000001406f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <IRQ>
 __raw_spin_unlock include/linux/spinlock_api_smp.h:151 [inline]
 _raw_spin_unlock+0x1a/0x40 kernel/locking/spinlock.c:183
 spin_unlock include/linux/spinlock.h:393 [inline]
 advance_sched+0x469/0x990 net/sched/sch_taprio.c:748
 __run_hrtimer kernel/time/hrtimer.c:1520 [inline]
 __hrtimer_run_queues+0x6a9/0xfc0 kernel/time/hrtimer.c:1584
 hrtimer_interrupt+0x32a/0x930 kernel/time/hrtimer.c:1646
 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1080 [inline]
 __sysvec_apic_timer_interrupt+0x142/0x5e0 arch/x86/kernel/apic/apic.c:1097
 asm_call_on_stack+0xf/0x20 arch/x86/entry/entry_64.S:711
 </IRQ>
 __run_on_irqstack arch/x86/include/asm/irq_stack.h:22 [inline]
 run_on_irqstack_cond arch/x86/include/asm/irq_stack.h:48 [inline]
 sysvec_apic_timer_interrupt+0xe0/0x120 arch/x86/kernel/apic/apic.c:1091
 asm_sysvec_apic_timer_interrupt+0x12/0x20 arch/x86/include/asm/idtentry.h:596
RIP: 0010:rep_nop arch/x86/include/asm/vdso/processor.h:13 [inline]
RIP: 0010:cpu_relax arch/x86/include/asm/vdso/processor.h:18 [inline]
RIP: 0010:csd_lock_wait kernel/smp.c:108 [inline]
RIP: 0010:smp_call_function_single+0x18b/0x4f0 kernel/smp.c:382
Code: 00 0b 00 48 8b 44 24 10 8b 7c 24 1c 48 8d 74 24 40 48 89 44 24 50 48 8b 44 24 08 48 89 44 24 58 e8 fa f9 ff ff 41 89 c5 eb 07 <e8> f0 ff 0a 00 f3 90 44 8b 64 24 48 31 ff 41 83 e4 01 44 89 e6 e8
RSP: 0018:ffffc900018379e0 EFLAGS: 00000202
RAX: 0000000000000002 RBX: 1ffff92000306f40 RCX: ffffffff8168b785
RDX: 0000000000000001 RSI: ffff88804984c180 RDI: 0000000000000005
RBP: ffffc90001837ac0 R08: 0000000000000001 R09: ffff8880ae736dc7
R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000001
R13: 0000000000000000 R14: 0000000000000001 R15: 0000000000000040
 smp_call_function_many_cond+0x1a4/0x990 kernel/smp.c:518
 smp_call_function_many kernel/smp.c:577 [inline]
 smp_call_function kernel/smp.c:599 [inline]
 on_each_cpu+0x4a/0x240 kernel/smp.c:699
 clock_was_set+0x18/0x20 kernel/time/hrtimer.c:872
 timekeeping_inject_offset+0x3e9/0x4d0 kernel/time/timekeeping.c:1305
 do_adjtimex+0x28f/0x990 kernel/time/timekeeping.c:2332
 do_clock_adjtime kernel/time/posix-timers.c:1109 [inline]
 __do_sys_clock_adjtime+0x155/0x250 kernel/time/posix-timers.c:1121
 do_syscall_64+0x60/0xe0 arch/x86/entry/common.c:359
 entry_SYSCALL_64_after_hwframe+0x44/0xa9
RIP: 0033:0x45cb29
Code: Bad RIP value.
RSP: 002b:00007f460e906c78 EFLAGS: 00000246 ORIG_RAX: 0000000000000131
RAX: ffffffffffffffda RBX: 00000000004db460 RCX: 000000000045cb29
RDX: 0000000000000000 RSI: 0000000020000300 RDI: 0000000000000000
RBP: 000000000078bfa0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00000000ffffffff
R13: 0000000000000077 R14: 00000000004c3473 R15: 00007f460e9076d4
rcu: rcu_preempt kthread starved for 10414 jiffies! g43217 f0x0 RCU_GP_WAIT_FQS(5) ->state=0x0 ->cpu=1
rcu: 	Unless rcu_preempt kthread gets sufficient CPU time, OOM is now expected behavior.
rcu: RCU grace-period kthread stack dump:
rcu_preempt     R  running task    29256    10      2 0x00004000
Call Trace:
 context_switch kernel/sched/core.c:3453 [inline]
 __schedule+0x8e1/0x1eb0 kernel/sched/core.c:4178
 schedule+0xd0/0x2a0 kernel/sched/core.c:4253
 schedule_timeout+0x148/0x250 kernel/time/timer.c:1897
 rcu_gp_fqs_loop kernel/rcu/tree.c:1874 [inline]
 rcu_gp_kthread+0xae5/0x1b50 kernel/rcu/tree.c:2044
 kthread+0x3b5/0x4a0 kernel/kthread.c:291
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:293