rcu: INFO: rcu_preempt self-detected stall on CPU
rcu: 	0-...!: (10499 ticks this GP) idle=c46/1/0x4000000000000000 softirq=191035/191035 fqs=1 
	(t=10501 jiffies g=373565 q=130)
rcu: rcu_preempt kthread starved for 10500 jiffies! g373565 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     I29120    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
NMI backtrace for cpu 0
CPU: 0 PID: 4431 Comm: syz-executor.2 Not tainted 5.8.0-rc4-syzkaller #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+0x18f/0x20d lib/dump_stack.c:118
 nmi_cpu_backtrace.cold+0x70/0xb1 lib/nmi_backtrace.c:101
 nmi_trigger_cpumask_backtrace+0x1b3/0x223 lib/nmi_backtrace.c:62
 trigger_single_cpu_backtrace include/linux/nmi.h:164 [inline]
 rcu_dump_cpu_stacks+0x194/0x1cf kernel/rcu/tree_stall.h:320
 print_cpu_stall kernel/rcu/tree_stall.h:553 [inline]
 check_cpu_stall kernel/rcu/tree_stall.h:627 [inline]
 rcu_pending kernel/rcu/tree.c:3489 [inline]
 rcu_sched_clock_irq.cold+0x5b3/0xccc kernel/rcu/tree.c:2504
 update_process_times+0x25/0x60 kernel/time/timer.c:1726
 tick_sched_handle+0x9b/0x180 kernel/time/tick-sched.c:176
 tick_sched_timer+0x108/0x290 kernel/time/tick-sched.c:1320
 __run_hrtimer kernel/time/hrtimer.c:1520 [inline]
 __hrtimer_run_queues+0x1d5/0xfc0 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
 run_on_irqstack_cond arch/x86/include/asm/irq_stack.h:50 [inline]
 sysvec_apic_timer_interrupt+0x4f/0x120 arch/x86/kernel/apic/apic.c:1091
 asm_sysvec_apic_timer_interrupt+0x12/0x20 arch/x86/include/asm/idtentry.h:587
RIP: 0010:arch_local_irq_restore arch/x86/include/asm/paravirt.h:765 [inline]
RIP: 0010:lock_acquire+0x270/0xad0 kernel/locking/lockdep.c:4962
Code: 00 00 00 00 fc ff df 48 c1 e8 03 80 3c 10 00 0f 85 f8 06 00 00 48 83 3d ad d0 5a 08 00 0f 84 a6 05 00 00 48 8b 7c 24 08 57 9d <0f> 1f 44 00 00 48 b8 00 00 00 00 00 fc ff df 48 03 44 24 10 48 c7
RSP: 0018:ffffc90000007bf0 EFLAGS: 00000282
RAX: 1ffffffff1369c10 RBX: ffff888036a1a580 RCX: 0000000000000001
RDX: dffffc0000000000 RSI: 0000000000000008 RDI: 0000000000000282
RBP: 0000000000000000 R08: 0000000000000000 R09: ffffffff8c58fae7
R10: fffffbfff18b1f5c R11: 0000000000000000 R12: 0000000000000000
R13: ffff888096560878 R14: 0000000000000000 R15: ffff88802b40a3a8
 __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:353 [inline]
 garp_join_timer+0x20/0xf0 net/802/garp.c:405
 call_timer_fn+0x1ac/0x760 kernel/time/timer.c:1404
 expire_timers kernel/time/timer.c:1449 [inline]
 __run_timers.part.0+0x54c/0xa20 kernel/time/timer.c:1773
 __run_timers kernel/time/timer.c:1745 [inline]
 run_timer_softirq+0xae/0x1a0 kernel/time/timer.c:1786
 __do_softirq+0x34c/0xa60 kernel/softirq.c:292
 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]
 do_softirq_own_stack+0x111/0x170 arch/x86/kernel/irq_64.c:77
 invoke_softirq kernel/softirq.c:387 [inline]
 __irq_exit_rcu kernel/softirq.c:417 [inline]
 irq_exit_rcu+0x229/0x270 kernel/softirq.c:429
 sysvec_apic_timer_interrupt+0x54/0x120 arch/x86/kernel/apic/apic.c:1091
 asm_sysvec_apic_timer_interrupt+0x12/0x20 arch/x86/include/asm/idtentry.h:587
RIP: 0010:preempt_schedule_irq+0xa6/0x150 kernel/sched/core.c:4436
Code: 00 00 e8 dd 21 69 f9 e8 f8 07 93 f9 4c 89 e8 48 c1 e8 03 80 3c 18 00 75 7a 48 83 3d c3 7b ce 01 00 74 6c fb 66 0f 1f 44 00 00 <bf> 01 00 00 00 e8 60 d2 ff ff 48 c7 c0 88 e0 b4 89 48 c1 e8 03 80
RSP: 0018:ffffc9001842f2c8 EFLAGS: 00000286
RAX: 1ffffffff1369c12 RBX: dffffc0000000000 RCX: 0000000000000006
RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffffffff87e664b8
RBP: ffffed1006d434b0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000001 R11: 0000000000000000 R12: ffff888036a1a580
R13: ffffffff89b4e090 R14: 0000000000000000 R15: 0000000000000000
 idtentry_exit_cond_resched arch/x86/entry/common.c:663 [inline]
 idtentry_exit_cond_rcu+0xc0/0xf0 arch/x86/entry/common.c:710
 asm_sysvec_apic_timer_interrupt+0x12/0x20 arch/x86/include/asm/idtentry.h:587
RIP: 0010:arch_local_irq_restore arch/x86/include/asm/paravirt.h:765 [inline]
RIP: 0010:kfree_call_rcu+0x476/0x7e0 kernel/rcu/tree.c:3287
Code: ba 00 00 00 00 00 fc ff df 48 c1 e8 03 80 3c 10 00 0f 85 8b 02 00 00 48 83 3d 65 c1 53 08 00 0f 84 e8 01 00 00 4c 89 f7 57 9d <0f> 1f 44 00 00 48 83 c4 08 5b 5d 41 5c 41 5d 41 5e 41 5f c3 48 8d
RSP: 0018:ffffc9001842f3b0 EFLAGS: 00000282
RAX: 1ffffffff1369c10 RBX: ffff8880ae6253a0 RCX: 0000000000000006
RDX: dffffc0000000000 RSI: 0000000000000000 RDI: 0000000000000282
RBP: ffffffffffffff80 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000001 R11: 0000000000000000 R12: ffff88802090f100
R13: ffff8880ae625591 R14: 0000000000000282 R15: ffff88802f14f000
 xt_rateest_put+0x27e/0x3c0 net/netfilter/xt_RATEEST.c:87
 cleanup_entry+0x245/0x340 net/ipv6/netfilter/ip6_tables.c:670
 translate_table+0xcfd/0x16a0 net/ipv6/netfilter/ip6_tables.c:745
 translate_compat_table+0x137a/0x1720 net/ipv6/netfilter/ip6_tables.c:1474
 compat_do_replace.constprop.0+0x193/0x380 net/ipv6/netfilter/ip6_tables.c:1528
 compat_do_ip6t_set_ctl+0x119/0x151 net/ipv6/netfilter/ip6_tables.c:1557
 compat_nf_sockopt net/netfilter/nf_sockopt.c:144 [inline]
 compat_nf_setsockopt+0x87/0x120 net/netfilter/nf_sockopt.c:156
 compat_ipv6_setsockopt+0x827/0x9c0 net/ipv6/ipv6_sockglue.c:1037
 inet_csk_compat_setsockopt+0x8d/0x100 net/ipv4/inet_connection_sock.c:1087
 compat_tcp_setsockopt+0x45/0x80 net/ipv4/tcp.c:3345
 compat_sock_common_setsockopt+0xaa/0x120 net/core/sock.c:3273
 __compat_sys_setsockopt+0x15d/0x310 net/compat.c:402
 __do_compat_sys_setsockopt net/compat.c:415 [inline]
 __se_compat_sys_setsockopt net/compat.c:412 [inline]
 __ia32_compat_sys_setsockopt+0xb9/0x150 net/compat.c:412
 do_syscall_32_irqs_on+0x3f/0x60 arch/x86/entry/common.c:428
 __do_fast_syscall_32 arch/x86/entry/common.c:475 [inline]
 do_fast_syscall_32+0x7f/0x120 arch/x86/entry/common.c:503
 entry_SYSENTER_compat_after_hwframe+0x4d/0x5c
RIP: 0023:0xf7fef569
Code: Bad RIP value.
RSP: 002b:00000000f5dea0cc EFLAGS: 00000296 ORIG_RAX: 000000000000016e
RAX: ffffffffffffffda RBX: 0000000000000005 RCX: 0000000000000029
RDX: 0000000000000040 RSI: 00000000200008c0 RDI: 00000000000003dc
RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000
R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000