rcu: INFO: rcu_preempt self-detected stall on CPU
rcu: 	1-...!: (10499 ticks this GP) idle=766/1/0x4000000000000004 softirq=10317/10318 fqs=18 
rcu: 	 (t=10500 jiffies g=5673 q=214)
rcu: rcu_preempt kthread starved for 10463 jiffies! g5673 f0x0 RCU_GP_WAIT_FQS(5) ->state=0x402 ->cpu=0
rcu: RCU grace-period kthread stack dump:
rcu_preempt     I29024    10      2 0x80000000
Call Trace:
 context_switch kernel/sched/core.c:2826 [inline]
 __schedule+0x866/0x1dc0 kernel/sched/core.c:3474
 schedule+0x92/0x1c0 kernel/sched/core.c:3518
 schedule_timeout+0x4db/0xfc0 kernel/time/timer.c:1804
 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 1
CPU: 1 PID: 7833 Comm: syz-executor377 Not tainted 4.19.71 #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:1636
 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:__list_del include/linux/list.h:105 [inline]
RIP: 0010:__list_del_entry include/linux/list.h:120 [inline]
RIP: 0010:__list_del_entry include/linux/list.h:115 [inline]
RIP: 0010:list_move_tail include/linux/list.h:182 [inline]
RIP: 0010:hhf_dequeue+0x608/0xa00 net/sched/sch_hhf.c:438
Code: ea 03 42 80 3c 22 00 0f 85 c3 03 00 00 49 8d 7f 08 4c 8b 73 08 48 89 fa 48 c1 ea 03 42 80 3c 22 00 0f 85 9f 03 00 00 4c 89 f2 <4d> 89 77 08 48 c1 ea 03 42 80 3c 22 00 0f 85 7c 03 00 00 4d 89 3e
RSP: 0000:ffff8880ae906fc8 EFLAGS: 00000246 ORIG_RAX: ffffffffffffff13
RAX: 1ffff1101519e29f RBX: ffff8880a8cf14f8 RCX: ffffffff858e8986
RDX: ffff8880a8cf1590 RSI: ffffffff858e8990 RDI: ffff8880a8cf1598
RBP: ffff8880ae907018 R08: ffff88808a712600 R09: 0000000000000008
R10: ffff88808a712fc0 R11: 000000003ae5d314 R12: dffffc0000000000
R13: ffff8880a8cf1240 R14: ffff8880a8cf1590 R15: ffff8880a8cf1590
 dequeue_skb net/sched/sch_generic.c:277 [inline]
 qdisc_restart net/sched/sch_generic.c:380 [inline]
 __qdisc_run+0x1e7/0x1960 net/sched/sch_generic.c:398
 __dev_xmit_skb net/core/dev.c:3501 [inline]
 __dev_queue_xmit+0x165c/0x2fe0 net/core/dev.c:3811
 dev_queue_xmit+0x18/0x20 net/core/dev.c:3876
 br_dev_queue_push_xmit+0x405/0x5d0 net/bridge/br_forward.c:56
 NF_HOOK include/linux/netfilter.h:289 [inline]
 NF_HOOK include/linux/netfilter.h:283 [inline]
 br_forward_finish+0xfa/0x400 net/bridge/br_forward.c:69
 NF_HOOK include/linux/netfilter.h:289 [inline]
 NF_HOOK include/linux/netfilter.h:283 [inline]
 __br_forward+0x647/0xb30 net/bridge/br_forward.c:113
 deliver_clone+0x61/0xc0 net/bridge/br_forward.c:129
 maybe_deliver net/bridge/br_forward.c:184 [inline]
 maybe_deliver net/bridge/br_forward.c:172 [inline]
 br_flood+0x4da/0x710 net/bridge/br_forward.c:226
 br_dev_xmit+0xeeb/0x1490 net/bridge/br_device.c:103
 __netdev_start_xmit include/linux/netdevice.h:4303 [inline]
 netdev_start_xmit include/linux/netdevice.h:4312 [inline]
 xmit_one net/core/dev.c:3257 [inline]
 dev_hard_start_xmit+0x1a5/0x980 net/core/dev.c:3273
 __dev_queue_xmit+0x2704/0x2fe0 net/core/dev.c:3843
 dev_queue_xmit+0x18/0x20 net/core/dev.c:3876
 neigh_hh_output include/net/neighbour.h:491 [inline]
 neigh_output include/net/neighbour.h:499 [inline]
 ip6_finish_output2+0x12fd/0x2550 net/ipv6/ip6_output.c:120
 ip6_finish_output+0x574/0xbe0 net/ipv6/ip6_output.c:154
 NF_HOOK_COND include/linux/netfilter.h:278 [inline]
 ip6_output+0x235/0x7c0 net/ipv6/ip6_output.c:171
 dst_output include/net/dst.h:447 [inline]
 NF_HOOK include/linux/netfilter.h:289 [inline]
 NF_HOOK include/linux/netfilter.h:283 [inline]
 mld_sendpack+0x9d3/0xeb0 net/ipv6/mcast.c:1683
 mld_send_cr net/ipv6/mcast.c:1979 [inline]
 mld_ifc_timer_expire+0x449/0x8a0 net/ipv6/mcast.c:2478
 call_timer_fn+0x18d/0x720 kernel/time/timer.c:1326
 expire_timers kernel/time/timer.c:1363 [inline]
 __run_timers kernel/time/timer.c:1682 [inline]
 __run_timers kernel/time/timer.c:1650 [inline]
 run_timer_softirq+0x652/0x1700 kernel/time/timer.c:1695
 __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:check_memory_region_inline mm/kasan/kasan.c:248 [inline]
RIP: 0010:check_memory_region+0x0/0x190 mm/kasan/kasan.c:267
Code: 48 8d 47 0f 48 89 c6 48 c1 ee 03 0f b6 14 16 84 d2 74 d5 83 e0 07 38 c2 40 0f 9e c6 eb c5 66 90 66 2e 0f 1f 84 00 00 00 00 00 <48> 85 f6 0f 84 21 01 00 00 48 b8 ff ff ff ff ff 7f ff ff 55 0f b6
RSP: 0000:ffff88807d287830 EFLAGS: 00000283 ORIG_RAX: ffffffffffffff13
RAX: 1ffffd400042c741 RBX: ffffea0002163a74 RCX: ffffffff8187a1c8
RDX: 0000000000000001 RSI: 0000000000000004 RDI: ffffea0002163a74
RBP: ffff88807d287838 R08: 1ffffd400042c746 R09: fffff9400042c747
R10: fffff9400042c746 R11: ffffea0002163a37 R12: ffffea0002160000
R13: ffffea0002163a40 R14: dffffc0000000000 R15: ffffea0002160001
 atomic_set include/asm-generic/atomic-instrumented.h:33 [inline]
 set_page_count include/linux/page_ref.h:77 [inline]
 prep_compound_page+0xe8/0x220 mm/page_alloc.c:607
 prep_new_page mm/page_alloc.c:1942 [inline]
 get_page_from_freelist+0x3b0d/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
 do_huge_pmd_anonymous_page+0x518/0x14e0 mm/huge_memory.c:720
 create_huge_pmd mm/memory.c:3932 [inline]
 __handle_mm_fault+0x2c80/0x3f80 mm/memory.c:4136
 handle_mm_fault+0x1b5/0x690 mm/memory.c:4202
 __do_page_fault+0x62a/0xe90 arch/x86/mm/fault.c:1390
 do_page_fault+0x71/0x57d arch/x86/mm/fault.c:1465
 page_fault+0x1e/0x30 arch/x86/entry/entry_64.S:1204
RIP: 0033:0x401a4f
Code: bf 29 00 00 00 e8 51 09 04 00 48 83 f8 ff 74 07 48 89 05 5c 16 2d 00 48 8b 05 9d 7a 0a 00 48 8b 35 4e 16 2d 00 b9 00 06 00 20 <c7> 04 25 10 06 00 20 00 00 00 00 ba 33 89 00 00 bf 10 00 00 00 48
RSP: 002b:00007ffd9a188b90 EFLAGS: 00010217
RAX: 735f656764697262 RBX: 0000000000000000 RCX: 0000000020000600
RDX: 0000000000000000 RSI: 0000000000000004 RDI: 0000000000000002
RBP: 000000000003e013 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000004 R11: 0000000000000246 R12: 0000000000000000
R13: 00000000004032f0 R14: 0000000000000000 R15: 0000000000000000