rcu: INFO: rcu_preempt self-detected stall on CPU
rcu: 	0-...!: (1 GPs behind) idle=172/1/0x4000000000000004 softirq=260056/260057 fqs=4 
rcu: 	 (t=10500 jiffies g=262709 q=272)
rcu: rcu_preempt kthread starved for 10491 jiffies! g262709 f0x0 RCU_GP_WAIT_FQS(5) ->state=0x0 ->cpu=1
rcu: RCU grace-period kthread stack dump:
rcu_preempt     R  running task    29104    10      2 0x80000000
Call Trace:
 context_switch kernel/sched/core.c:2826 [inline]
 __schedule+0x866/0x1dc0 kernel/sched/core.c:3515
 schedule+0x92/0x1c0 kernel/sched/core.c:3559
 schedule_timeout+0x4db/0xfc0 kernel/time/timer.c:1806
 rcu_gp_kthread+0xd5c/0x2190 kernel/rcu/tree.c:2202
 kthread+0x354/0x420 kernel/kthread.c:246
 ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:415
NMI backtrace for cpu 0
CPU: 0 PID: 28086 Comm: syz-executor.4 Not tainted 4.19.79 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Call Trace:
 <IRQ>
 __dump_stack lib/dump_stack.c:77 [inline]
 dump_stack+0x172/0x1f0 lib/dump_stack.c:113
 nmi_cpu_backtrace.cold+0x63/0xa4 lib/nmi_backtrace.c:101
 nmi_trigger_cpumask_backtrace+0x1b0/0x1f8 lib/nmi_backtrace.c:62
 arch_trigger_cpumask_backtrace+0x14/0x20 arch/x86/kernel/apic/hw_nmi.c:38
 trigger_single_cpu_backtrace include/linux/nmi.h:164 [inline]
 rcu_dump_cpu_stacks+0x189/0x1d5 kernel/rcu/tree.c:1340
 print_cpu_stall kernel/rcu/tree.c:1478 [inline]
 check_cpu_stall kernel/rcu/tree.c:1550 [inline]
 __rcu_pending kernel/rcu/tree.c:3293 [inline]
 rcu_pending kernel/rcu/tree.c:3336 [inline]
 rcu_check_callbacks.cold+0x5e3/0xd90 kernel/rcu/tree.c:2682
 update_process_times+0x32/0x80 kernel/time/timer.c:1638
 tick_sched_handle+0xa2/0x190 kernel/time/tick-sched.c:164
 tick_sched_timer+0x47/0x130 kernel/time/tick-sched.c:1274
 __run_hrtimer kernel/time/hrtimer.c:1398 [inline]
 __hrtimer_run_queues+0x33b/0xdc0 kernel/time/hrtimer.c:1460
 hrtimer_interrupt+0x314/0x770 kernel/time/hrtimer.c:1518
 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1067 [inline]
 smp_apic_timer_interrupt+0x111/0x550 arch/x86/kernel/apic/apic.c:1092
 apic_timer_interrupt+0xf/0x20 arch/x86/entry/entry_64.S:893
RIP: 0010:pie_timer+0x5d/0x790 net/sched/sch_pie.c:431
Code: 3c 02 00 0f 85 df 06 00 00 48 8b 45 d0 48 8b 58 48 48 b8 00 00 00 00 00 fc ff df 48 8d 7b 40 48 89 fa 48 c1 ea 03 80 3c 02 00 <0f> 85 ae 06 00 00 48 b8 00 00 00 00 00 fc ff df 4c 8b 63 40 49 8d
RSP: 0018:ffff8880ae807c98 EFLAGS: 00000246 ORIG_RAX: ffffffffffffff13
RAX: dffffc0000000000 RBX: ffff888040c1bb40 RCX: ffffffff815b118a
RDX: 1ffff11008183770 RSI: ffffffff858c287d RDI: ffff888040c1bb80
RBP: ffff8880ae807d08 R08: ffff88805cccc300 R09: ffffed1015d04733
R10: ffffed1015d04732 R11: ffff8880ae823993 R12: 0000000000000100
R13: ffff8880ae807db0 R14: 1ffff11015d00fa6 R15: 0000000000000000
 call_timer_fn+0x18d/0x720 kernel/time/timer.c:1326
 expire_timers kernel/time/timer.c:1363 [inline]
 __run_timers kernel/time/timer.c:1684 [inline]
 __run_timers kernel/time/timer.c:1652 [inline]
 run_timer_softirq+0x64f/0x16a0 kernel/time/timer.c:1697
 __do_softirq+0x25c/0x921 kernel/softirq.c:292
 invoke_softirq kernel/softirq.c:372 [inline]
 irq_exit+0x180/0x1d0 kernel/softirq.c:412
 exiting_irq arch/x86/include/asm/apic.h:536 [inline]
 smp_apic_timer_interrupt+0x13b/0x550 arch/x86/kernel/apic/apic.c:1094
 apic_timer_interrupt+0xf/0x20 arch/x86/entry/entry_64.S:893
 </IRQ>
RIP: 0010:memset_erms+0x9/0x10 arch/x86/lib/memset_64.S:66
Code: c1 e9 03 40 0f b6 f6 48 b8 01 01 01 01 01 01 01 01 48 0f af c6 f3 48 ab 89 d1 f3 aa 4c 89 c8 c3 90 49 89 f9 40 88 f0 48 89 d1 <f3> aa 4c 89 c8 c3 90 49 89 fa 40 0f b6 ce 48 b8 01 01 01 01 01 01
RSP: 0018:ffff888026e17940 EFLAGS: 00010206 ORIG_RAX: ffffffffffffff13
RAX: 1ffff11005040000 RBX: ffffed1005040000 RCX: 0000000000025ac0
RDX: 0000000000040000 RSI: 0000000000000000 RDI: ffffed100501a540
RBP: ffff888026e17958 R08: 1ffffd4000140006 R09: ffffed1005000000
R10: fffff94000140006 R11: ffffea0000a00037 R12: 0000000000200000
R13: 0000000000000200 R14: ffffea0000a08030 R15: dffffc0000000000
 kasan_alloc_pages+0x38/0x40 mm/kasan/kasan.c:311
 post_alloc_hook mm/page_alloc.c:1925 [inline]
 prep_new_page mm/page_alloc.c:1935 [inline]
 get_page_from_freelist+0x1182/0x4410 mm/page_alloc.c:3366
 __alloc_pages_nodemask+0x308/0x750 mm/page_alloc.c:4389
 __alloc_pages include/linux/gfp.h:473 [inline]
 __alloc_pages_node include/linux/gfp.h:486 [inline]
 alloc_pages_vma+0x3b6/0x590 mm/mempolicy.c:2150
 new_page+0x2d5/0x3d0 mm/mempolicy.c:1169
 unmap_and_move mm/migrate.c:1168 [inline]
 migrate_pages+0x496/0x2cc0 mm/migrate.c:1419
 do_mbind mm/mempolicy.c:1287 [inline]
 kernel_mbind+0xb43/0xe00 mm/mempolicy.c:1405
 __do_sys_mbind mm/mempolicy.c:1412 [inline]
 __se_sys_mbind mm/mempolicy.c:1408 [inline]
 __x64_sys_mbind+0xe1/0x1a0 mm/mempolicy.c:1408
 do_syscall_64+0xfd/0x620 arch/x86/entry/common.c:293
 entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x459a59
Code: fd b7 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 cb b7 fb ff c3 66 2e 0f 1f 84 00 00 00 00
RSP: 002b:00007f90ed444c78 EFLAGS: 00000246 ORIG_RAX: 00000000000000ed
RAX: ffffffffffffffda RBX: 0000000000000006 RCX: 0000000000459a59
RDX: 0000000000000000 RSI: 0000000000800000 RDI: 00000000203b5000
RBP: 000000000075bf20 R08: 0000000000000000 R09: 0000000000000003
R10: 0000000000000000 R11: 0000000000000246 R12: 00007f90ed4456d4
R13: 00000000004c60e8 R14: 00000000004db0d8 R15: 00000000ffffffff