rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
	(detected by 0, t=10502 jiffies, g=94489, q=44)
rcu: All QSes seen, last rcu_preempt kthread activity 10502 (4295021824-4295011322), jiffies_till_next_fqs=1, root ->qsmask 0x0
rcu: rcu_preempt kthread starved for 10502 jiffies! g94489 f0x2 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:
task:rcu_preempt     state:R  running task     stack:28880 pid:   12 ppid:     2 flags:0x00004000
Call Trace:
 context_switch kernel/sched/core.c:4325 [inline]
 __schedule+0x8eb/0x21b0 kernel/sched/core.c:5076
 schedule+0xcf/0x270 kernel/sched/core.c:5155
 schedule_timeout+0x148/0x250 kernel/time/timer.c:1878
 rcu_gp_fqs_loop kernel/rcu/tree.c:1949 [inline]
 rcu_gp_kthread+0xc7b/0x23f0 kernel/rcu/tree.c:2122
 kthread+0x3b1/0x4a0 kernel/kthread.c:292
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:296
rcu: Stack dump where RCU GP kthread last ran:
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 PID: 22940 Comm: syz-executor.0 Not tainted 5.10.0-rc7-next-20201208-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
RIP: 0010:__lock_acquire+0x243/0x54b0 kernel/locking/lockdep.c:4766
Code: 24 08 4e 8d 24 10 49 8d 44 24 20 66 81 e1 ff 1f 48 89 c2 48 89 44 24 28 48 b8 00 00 00 00 00 fc ff df 48 c1 ea 03 0f b6 14 02 <84> d2 74 09 80 fa 03 0f 8e 8e 12 00 00 41 0f b7 44 24 20 49 8d 7c
RSP: 0018:ffffc90000da0b78 EFLAGS: 00000806
RAX: dffffc0000000000 RBX: 0000000000000001 RCX: 0000000000000b90
RDX: 0000000000000000 RSI: ffff88801bde8990 RDI: ffff888029a4b308
RBP: ffff88801bde8000 R08: 0000000000000001 R09: 0000000000000001
R10: 0000000000000000 R11: 0000000000000000 R12: ffff88801bde8990
R13: 0000000000000000 R14: ffff888029a4b300 R15: 0000000000000000
FS:  00007f98b9305700(0000) GS:ffff8880b9d00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000001b31c22000 CR3: 000000002796c000 CR4: 00000000001526e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <IRQ>
 lock_acquire kernel/locking/lockdep.c:5437 [inline]
 lock_acquire+0x29d/0x750 kernel/locking/lockdep.c:5402
 __raw_spin_lock include/linux/spinlock_api_smp.h:142 [inline]
 _raw_spin_lock+0x2a/0x40 kernel/locking/spinlock.c:151
 spin_lock include/linux/spinlock.h:354 [inline]
 advance_sched+0x4f/0xa20 net/sched/sch_taprio.c:700
 __run_hrtimer kernel/time/hrtimer.c:1519 [inline]
 __hrtimer_run_queues+0x609/0xea0 kernel/time/hrtimer.c:1583
 hrtimer_interrupt+0x334/0x960 kernel/time/hrtimer.c:1645
 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1085 [inline]
 __sysvec_apic_timer_interrupt+0x146/0x550 arch/x86/kernel/apic/apic.c:1102
 asm_call_irq_on_stack+0xf/0x20
 </IRQ>
 __run_sysvec_on_irqstack arch/x86/include/asm/irq_stack.h:37 [inline]
 run_sysvec_on_irqstack_cond arch/x86/include/asm/irq_stack.h:89 [inline]
 sysvec_apic_timer_interrupt+0xbd/0x100 arch/x86/kernel/apic/apic.c:1096
 asm_sysvec_apic_timer_interrupt+0x12/0x20 arch/x86/include/asm/idtentry.h:628
RIP: 0010:__raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:161 [inline]
RIP: 0010:_raw_spin_unlock_irqrestore+0x25/0x50 kernel/locking/spinlock.c:191
Code: f7 5d c3 66 90 55 48 89 fd 48 83 c7 18 53 48 89 f3 48 8b 74 24 10 e8 0a a5 3f f8 48 89 ef e8 52 58 40 f8 f6 c7 02 75 1a 53 9d <bf> 01 00 00 00 e8 51 52 34 f8 65 8b 05 fa d6 e9 76 85 c0 74 0a 5b
RSP: 0018:ffffc90015ce7d98 EFLAGS: 00000212
RAX: 00000000000001e7 RBX: 0000000000000212 RCX: 1ffffffff1afa279
RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000000
RBP: ffffffff8b7b04c0 R08: 0000000000000001 R09: 0000000000000001
R10: ffffffff81781d88 R11: 0000000000000000 R12: 1ffff92002b9cfbd
R13: 0000000000000000 R14: ffffffffa02f8f2b R15: ffffc90015ce7ed8
 do_settimeofday64 kernel/time/timekeeping.c:1324 [inline]
 do_settimeofday64+0x3c6/0x5b0 kernel/time/timekeeping.c:1293
 do_sys_settimeofday64 kernel/time/time.c:195 [inline]
 do_sys_settimeofday64+0x1de/0x260 kernel/time/time.c:169
 __do_sys_clock_settime kernel/time/posix-timers.c:1079 [inline]
 __se_sys_clock_settime kernel/time/posix-timers.c:1067 [inline]
 __x64_sys_clock_settime+0x1a1/0x280 kernel/time/posix-timers.c:1067
 do_syscall_64+0x2d/0x70 arch/x86/entry/common.c:46
 entry_SYSCALL_64_after_hwframe+0x44/0xa9
RIP: 0033:0x45e0f9
Code: 0d b4 fb ff c3 66 2e 0f 1f 84 00 00 00 00 00 66 90 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 0f 83 db b3 fb ff c3 66 2e 0f 1f 84 00 00 00 00
RSP: 002b:00007f98b9304c68 EFLAGS: 00000246 ORIG_RAX: 00000000000000e3
RAX: ffffffffffffffda RBX: 0000000000000002 RCX: 000000000045e0f9
RDX: 0000000000000000 RSI: 0000000020000400 RDI: 0000000000000000
RBP: 000000000119bfb8 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 000000000119bf8c
R13: 00007ffca302e29f R14: 00007f98b93059c0 R15: 000000000119bf8c