rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: 	0-....: (1 GPs behind) idle=ee2/1/0x4000000000000002 softirq=103897/103898 fqs=5244 
	(detected by 1, t=10502 jiffies, g=187753, q=2341)
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 PID: 20361 Comm: syz-executor.0 Not tainted 5.9.0-rc1-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
RIP: 0010:orc_ip arch/x86/kernel/unwind_orc.c:29 [inline]
RIP: 0010:__orc_find+0x6f/0xf0 arch/x86/kernel/unwind_orc.c:51
Code: 72 4d 4c 89 e0 48 29 e8 48 89 c2 48 c1 e8 3f 48 c1 fa 02 48 01 d0 48 d1 f8 48 8d 5c 85 00 48 89 d8 48 c1 e8 03 42 0f b6 14 38 <48> 89 d8 83 e0 07 83 c0 03 38 d0 7c 04 84 d2 75 48 48 63 03 48 01
RSP: 0018:ffffc90000007000 EFLAGS: 00000803
RAX: 1ffffffff162861f RBX: ffffffff8b1430fc RCX: ffffffff87f3c3f0
RDX: 0000000000000000 RSI: ffffffff8b9bb312 RDI: ffffffff8b1430d4
RBP: ffffffff8b1430f0 R08: ffffffff8b9bb366 R09: ffffffff8b9bb312
R10: 000000000007201e R11: 00000000001610ad R12: ffffffff8b143108
R13: ffffffff8b1430d4 R14: ffffffff8b1430ec R15: dffffc0000000000
FS:  00007f3997f2e700(0000) GS:ffff8880ae600000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000000000000 CR3: 000000009d714000 CR4: 00000000001506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000600
Call Trace:
 <IRQ>
 orc_find arch/x86/kernel/unwind_orc.c:172 [inline]
 unwind_next_frame+0x342/0x1f90 arch/x86/kernel/unwind_orc.c:449
 perf_callchain_kernel+0x444/0x6a0 arch/x86/events/core.c:2449
 get_perf_callchain+0x16e/0x620 kernel/events/callchain.c:200
 perf_callchain+0x165/0x1c0 kernel/events/core.c:6985
 perf_prepare_sample+0x8fd/0x1d40 kernel/events/core.c:7012
 __perf_event_output kernel/events/core.c:7170 [inline]
 perf_event_output_forward+0xf3/0x270 kernel/events/core.c:7190
 __perf_event_overflow+0x13c/0x370 kernel/events/core.c:8845
 perf_swevent_overflow kernel/events/core.c:8921 [inline]
 perf_swevent_event+0x347/0x550 kernel/events/core.c:8949
 perf_tp_event+0x2e4/0xb50 kernel/events/core.c:9377
 perf_trace_run_bpf_submit+0x11c/0x200 kernel/events/core.c:9351
 perf_trace_preemptirq_template+0x289/0x440 include/trace/events/preemptirq.h:14
 trace_irq_enable_rcuidle include/trace/events/preemptirq.h:40 [inline]
 trace_irq_enable_rcuidle include/trace/events/preemptirq.h:40 [inline]
 trace_hardirqs_on+0x18a/0x220 kernel/trace/trace_preemptirq.c:44
 asm_sysvec_irq_work+0x12/0x20 arch/x86/include/asm/idtentry.h:611
RIP: 0010:arch_local_irq_restore arch/x86/include/asm/paravirt.h:770 [inline]
RIP: 0010:rcu_read_unlock_special kernel/rcu/tree_plugin.h:630 [inline]
RIP: 0010:__rcu_read_unlock+0x488/0x560 kernel/rcu/tree_plugin.h:395
Code: 48 c7 c0 48 36 b6 89 48 ba 00 00 00 00 00 fc ff df 48 c1 e8 03 80 3c 10 00 75 53 48 83 3d 77 46 54 08 00 74 13 4c 89 e7 57 9d <0f> 1f 44 00 00 e9 ed fb ff ff 0f 0b 0f 0b 0f 0b 0f 0b 4c 89 ef e8
RSP: 0018:ffffc90000007b20 EFLAGS: 00000282
RAX: 1ffffffff136c6c9 RBX: ffffffff89bd9c01 RCX: 0000000000000002
RDX: dffffc0000000000 RSI: 0000000000000000 RDI: 0000000000000282
RBP: 0000000000000001 R08: 0000000000000001 R09: ffffffff8c5f5a8f
R10: fffffbfff18beb51 R11: 0000000000000001 R12: 0000000000000282
R13: 0000000000000200 R14: ffff8880ae636c40 R15: 0000000000000000
 rcu_read_unlock include/linux/rcupdate.h:687 [inline]
 mld_sendpack+0x742/0xdb0 net/ipv6/mcast.c:1690
 mld_send_cr net/ipv6/mcast.c:1975 [inline]
 mld_ifc_timer_expire+0x60a/0xf10 net/ipv6/mcast.c:2474
 call_timer_fn+0x1ac/0x760 kernel/time/timer.c:1413
 expire_timers kernel/time/timer.c:1458 [inline]
 __run_timers.part.0+0x67c/0xaa0 kernel/time/timer.c:1755
 __run_timers kernel/time/timer.c:1736 [inline]
 run_timer_softirq+0xae/0x1a0 kernel/time/timer.c:1768
 __do_softirq+0x2de/0xa24 kernel/softirq.c:298
 asm_call_on_stack+0xf/0x20 arch/x86/entry/entry_64.S:706
 </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+0x9d/0xd0 arch/x86/kernel/irq_64.c:77
 invoke_softirq kernel/softirq.c:393 [inline]
 __irq_exit_rcu kernel/softirq.c:423 [inline]
 irq_exit_rcu+0x1f3/0x230 kernel/softirq.c:435
 sysvec_apic_timer_interrupt+0x51/0xf0 arch/x86/kernel/apic/apic.c:1091
 asm_sysvec_apic_timer_interrupt+0x12/0x20 arch/x86/include/asm/idtentry.h:581
RIP: 0010:__raw_spin_unlock_irq include/linux/spinlock_api_smp.h:169 [inline]
RIP: 0010:_raw_spin_unlock_irq+0x4b/0x80 kernel/locking/spinlock.c:199
Code: c0 58 36 b6 89 48 ba 00 00 00 00 00 fc ff df 48 c1 e8 03 80 3c 10 00 75 31 48 83 3d c6 d0 bf 01 00 74 25 fb 66 0f 1f 44 00 00 <bf> 01 00 00 00 e8 cb 51 59 f9 65 8b 05 d4 98 0b 78 85 c0 74 02 5d
RSP: 0018:ffffc90006537978 EFLAGS: 00000286
RAX: 1ffffffff136c6cb RBX: ffff88808826c100 RCX: 0000000000000006
RDX: dffffc0000000000 RSI: 0000000000000000 RDI: ffffffff87f6656f
RBP: ffff8880ae635e40 R08: 0000000000000001 R09: ffffffff8c5f5abf
R10: fffffbfff18beb57 R11: 0000000000000001 R12: ffff8880ae635e40
R13: ffff8880619104c0 R14: 0000000000000000 R15: 0000000000000001
 finish_lock_switch kernel/sched/core.c:3517 [inline]
 finish_task_switch+0x147/0x750 kernel/sched/core.c:3617
 context_switch kernel/sched/core.c:3781 [inline]
 __schedule+0x8ed/0x21e0 kernel/sched/core.c:4527
 preempt_schedule_common+0x45/0xc0 kernel/sched/core.c:4683
 preempt_schedule_thunk+0x16/0x18 arch/x86/entry/thunk_64.S:40
 smp_call_function_single+0x467/0x4f0 kernel/smp.c:384
 task_function_call+0xd7/0x160 kernel/events/core.c:116
 perf_install_in_context+0x2cb/0x550 kernel/events/core.c:2895
 __do_sys_perf_event_open+0x1c31/0x2cb0 kernel/events/core.c:11992
 do_syscall_64+0x2d/0x70 arch/x86/entry/common.c:46
 entry_SYSCALL_64_after_hwframe+0x44/0xa9
RIP: 0033:0x45d5b9
Code: 5d 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 2b b4 fb ff c3 66 2e 0f 1f 84 00 00 00 00
RSP: 002b:00007f3997f2dc78 EFLAGS: 00000246 ORIG_RAX: 000000000000012a
RAX: ffffffffffffffda RBX: 0000000000024780 RCX: 000000000045d5b9
RDX: ffffffffffffffff RSI: 0000000000000000 RDI: 0000000020000180
RBP: 000000000118cf90 R08: 0000000000000000 R09: 0000000000000000
R10: ffffffffffffffff R11: 0000000000000246 R12: 000000000118cf4c
R13: 00007fff0522790f R14: 00007f3997f2e9c0 R15: 000000000118cf4c