rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: 	1-...0: (1 GPs behind) idle=3c8c/0/0x1 softirq=47715/47716 fqs=2100
rcu: 	         hardirqs   softirqs   csw/system
rcu: 	 number:        0          0            0
rcu: 	cputime:        0          0            0   ==> 52500(ms)
rcu: 	(detected by 0, t=10505 jiffies, g=46385, q=813 ncpus=2)
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 UID: 0 PID: 0 Comm: swapper/1 Tainted: G             L      syzkaller #0 PREEMPT(full) 
Tainted: [L]=SOFTLOCKUP
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.2-debian-1.16.2-1 04/01/2014
RIP: 0010:__sanitizer_cov_trace_pc+0x20/0x80
Code: 90 90 90 90 90 90 90 90 90 90 f3 0f 1e fa 48 8b 04 24 65 48 8b 0d a8 f1 cb 11 65 48 8b 15 a8 f1 cb 11 f7 c2 00 01 00 ff 74 29 <89> d6 81 e6 00 01 00 0f 81 fe 00 01 00 00 40 0f 95 c6 81 fa 00 00
RSP: 0018:ffffc90000a18d70 EFLAGS: 00000006
RAX: ffffffff81b456fc RBX: ffff88823c628280 RCX: ffff8881604a8000
RDX: 0000000001000002 RSI: 0000000000000001 RDI: 0000000000000000
RBP: dffffc0000000000 R08: 0000000001000001 R09: 1ffffffff357e758
R10: dffffc0000000000 R11: fffffbfff357e759 R12: 0000000000000000
R13: 0000000000000001 R14: ffff8881a639e300 R15: ffff88823c6283c0
FS:  0000000000000000(0000) GS:ffff8882a8ce6000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000001b2f320ff8 CR3: 000000011aea6000 CR4: 00000000000006f0
Call Trace:
 <IRQ>
 __remove_hrtimer+0x9c/0x3e0
 __hrtimer_run_queues+0x295/0xa10
 hrtimer_interrupt+0x4cd/0xaa0
 __sysvec_apic_timer_interrupt+0x102/0x430
 sysvec_apic_timer_interrupt+0xa1/0xc0
 </IRQ>
 <TASK>
 asm_sysvec_apic_timer_interrupt+0x1a/0x20
RIP: 0010:pv_native_safe_halt+0xf/0x20
Code: 7c 92 02 c3 cc cc cc cc cc cc cc 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 f3 0f 1e fa eb 07 0f 00 2d d3 c0 27 00 fb f4 <e9> 4c 0b 03 00 cc cc cc cc cc cc cc cc cc cc cc cc 90 90 90 90 90
RSP: 0018:ffffc900001a7e40 EFLAGS: 00000202
RAX: 00000000001af5cb RBX: ffffffff819b9c40 RCX: 8000000000000001
RDX: 0000000000000001 RSI: ffffffff8e472e42 RDI: ffffffff8c6d6d80
RBP: ffffc900001a7f10 R08: ffff88823c633a1b R09: 1ffff110478c6743
R10: dffffc0000000000 R11: ffffed10478c6744 R12: 0000000000000000
R13: 1ffff1102c095000 R14: 1ffff92000034fd0 R15: dffffc0000000000
 default_idle+0x9/0x20
 default_idle_call+0x72/0xb0
 do_idle+0x2e0/0x540
 cpu_startup_entry+0x43/0x60
 start_secondary+0x101/0x110
 common_startup_64+0x13e/0x157
 </TASK>
