======================================
| [   14.273406][    C2] 1 lock held by swapper/2/0:
| [ 14.273601][ C2] #0: ffffffffa6574480 (rcu_callback){....}-{0:0}, at: rcu_do_batch (./include/linux/rcupdate.h:331 kernel/rcu/tree.c:2562) 
| [   14.273942][    C2]
| [   14.273942][    C2] stack backtrace:
[   14.274185][    C2] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[   14.274187][    C2] Call Trace:
[   14.274188][    C2]  <IRQ>
[ 14.274190][ C2] dump_stack_lvl (lib/dump_stack.c:123) 
[ 14.274197][ C2] print_usage_bug.part.0 (kernel/locking/lockdep.c:4046) 
[ 14.274201][ C2] mark_lock_irq (kernel/locking/lockdep.c:4011 kernel/locking/lockdep.c:4057 kernel/locking/lockdep.c:4268) 
[ 14.274206][ C2] ? __pfx_unwind_next_frame (arch/x86/kernel/unwind_orc.c:469) 
[ 14.274212][ C2] ? save_trace (kernel/locking/lockdep.c:594) 
[ 14.274216][ C2] mark_lock (kernel/locking/lockdep.c:4754) 
[ 14.274220][ C2] mark_usage (kernel/locking/lockdep.c:4643) 
[ 14.274223][ C2] __lock_acquire (kernel/locking/lockdep.c:5189) 
[ 14.274229][ C2] lock_acquire.part.0 (kernel/locking/lockdep.c:472 kernel/locking/lockdep.c:5868) 
[ 14.274233][ C2] ? simple_pin_fs (fs/libfs.c:1066) 
[ 14.274236][ C2] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:736) 
[ 14.274242][ C2] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5829) 
[ 14.274245][ C2] ? simple_pin_fs (fs/libfs.c:1066) 
[ 14.274249][ C2] _raw_spin_lock (./include/linux/spinlock_api_smp.h:134 kernel/locking/spinlock.c:154) 
[ 14.274252][ C2] ? simple_pin_fs (fs/libfs.c:1066) 
[ 14.274255][ C2] simple_pin_fs (fs/libfs.c:1066) 
[ 14.274259][ C2] debugfs_remove (fs/debugfs/inode.c:805 fs/debugfs/inode.c:799) 
[ 14.274262][ C2] ref_tracker_dir_exit (lib/ref_tracker.c:423 lib/ref_tracker.c:195) 
[ 14.274267][ C2] ? __pfx_ref_tracker_free (lib/ref_tracker.c:253) 
[ 14.274270][ C2] ? __sk_destruct (./include/linux/instrumented.h:96 ./include/linux/atomic/atomic-instrumented.h:400 ./include/linux/refcount.h:389 ./include/linux/refcount.h:432 ./include/linux/refcount.h:450 ./include/net/net_namespace.h:287 ./include/net/net_namespace.h:390 net/core/sock.c:2333) 
[ 14.274275][ C2] ? rcu_do_batch (kernel/rcu/tree.c:2568) 
[ 14.274278][ C2] ? __pfx_ref_tracker_dir_exit (lib/ref_tracker.c:189) 
[ 14.274281][ C2] ? irq_exit_rcu (kernel/softirq.c:698) 
[ 14.274284][ C2] ? sysvec_apic_timer_interrupt (arch/x86/kernel/apic/apic.c:1049 arch/x86/kernel/apic/apic.c:1049) 
[ 14.274288][ C2] ? asm_sysvec_apic_timer_interrupt (./arch/x86/include/asm/idtentry.h:702) 
[ 14.274291][ C2] ? pv_native_safe_halt (arch/x86/kernel/paravirt.c:81) 
[ 14.274294][ C2] ? default_idle (./arch/x86/include/asm/paravirt.h:107 arch/x86/kernel/process.c:748) 
[ 14.274296][ C2] ? default_idle_call (./include/linux/cpuidle.h:143 kernel/sched/idle.c:118) 
[ 14.274299][ C2] ? cpuidle_idle_call (kernel/sched/idle.c:186) 
[ 14.274303][ C2] ? do_idle (kernel/sched/idle.c:325) 
[ 14.274306][ C2] ? cpu_startup_entry (kernel/sched/idle.c:422 (discriminator 1)) 
[ 14.274309][ C2] ? start_secondary (arch/x86/kernel/smpboot.c:203 arch/x86/kernel/smpboot.c:283) 
[ 14.274313][ C2] ? common_startup_64 (arch/x86/kernel/head_64.S:419) 
[ 14.274319][ C2] __put_net (net/core/net_namespace.c:732) 
[ 14.274323][ C2] __sk_destruct (./include/net/net_namespace.h:288 ./include/net/net_namespace.h:390 net/core/sock.c:2333) 
[ 14.274327][ C2] ? rcu_do_batch (kernel/rcu/tree.c:2568) 
[ 14.274330][ C2] rcu_do_batch (kernel/rcu/tree.c:2568) 
[ 14.274333][ C2] ? find_held_lock (kernel/locking/lockdep.c:5348) 
[ 14.274337][ C2] ? __pfx_rcu_do_batch (kernel/rcu/tree.c:2492) 
[ 14.274341][ C2] ? _raw_spin_unlock_irqrestore (./include/linux/spinlock_api_smp.h:151 kernel/locking/spinlock.c:194) 
[ 14.274344][ C2] ? lockdep_hardirqs_on (kernel/locking/lockdep.c:4473) 
[ 14.274348][ C2] ? _raw_spin_unlock_irqrestore (./arch/x86/include/asm/preempt.h:104 ./include/linux/spinlock_api_smp.h:152 kernel/locking/spinlock.c:194) 
[ 14.274352][ C2] rcu_core (kernel/rcu/tree.c:2826) 
[ 14.274355][ C2] handle_softirqs (kernel/softirq.c:579) 
[ 14.274360][ C2] __irq_exit_rcu (kernel/softirq.c:614 kernel/softirq.c:453 kernel/softirq.c:680) 
[ 14.274362][ C2] irq_exit_rcu (kernel/softirq.c:698) 
[ 14.274364][ C2] sysvec_apic_timer_interrupt (arch/x86/kernel/apic/apic.c:1049 arch/x86/kernel/apic/apic.c:1049) 
[   14.274368][    C2]  </IRQ>
[   14.274369][    C2]  <TASK>
[ 14.274370][ C2] asm_sysvec_apic_timer_interrupt (./arch/x86/include/asm/idtentry.h:702) 
[ 14.274373][ C2] RIP: 0010:pv_native_safe_halt (arch/x86/kernel/paravirt.c:81) 
[ 14.274377][ C2] Code: b0 b8 00 c3 cc cc cc cc 0f 1f 00 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 f3 0f 1e fa 66 90 0f 00 2d a3 d0 13 00 fb f4 <c3> cc cc cc cc 66 2e 0f 1f 84 00 00 00 00 00 66 90 90 90 90 90 90
All code
========
   0:	b0 b8                	mov    $0xb8,%al
   2:	00 c3                	add    %al,%bl
   4:	cc                   	int3
   5:	cc                   	int3
   6:	cc                   	int3
   7:	cc                   	int3
   8:	0f 1f 00             	nopl   (%rax)
   b:	90                   	nop
   c:	90                   	nop
   d:	90                   	nop
   e:	90                   	nop
   f:	90                   	nop
  10:	90                   	nop
  11:	90                   	nop
  12:	90                   	nop
  13:	90                   	nop
  14:	90                   	nop
  15:	90                   	nop
  16:	90                   	nop
  17:	90                   	nop
  18:	90                   	nop
  19:	90                   	nop
  1a:	90                   	nop
  1b:	f3 0f 1e fa          	endbr64
  1f:	66 90                	xchg   %ax,%ax
  21:	0f 00 2d a3 d0 13 00 	verw   0x13d0a3(%rip)        # 0x13d0cb
  28:	fb                   	sti
  29:	f4                   	hlt
  2a:*	c3                   	ret		<-- trapping instruction
  2b:	cc                   	int3
  2c:	cc                   	int3
  2d:	cc                   	int3
  2e:	cc                   	int3
  2f:	66 2e 0f 1f 84 00 00 	cs nopw 0x0(%rax,%rax,1)
  36:	00 00 00 
  39:	66 90                	xchg   %ax,%ax
  3b:	90                   	nop
  3c:	90                   	nop
  3d:	90                   	nop
  3e:	90                   	nop
  3f:	90                   	nop

Code starting with the faulting instruction
===========================================
   0:	c3                   	ret
   1:	cc                   	int3
   2:	cc                   	int3
   3:	cc                   	int3
   4:	cc                   	int3
   5:	66 2e 0f 1f 84 00 00 	cs nopw 0x0(%rax,%rax,1)
   c:	00 00 00 
   f:	66 90                	xchg   %ax,%ax
  11:	90                   	nop
  12:	90                   	nop
  13:	90                   	nop
  14:	90                   	nop
  15:	90                   	nop
[   14.274379][    C2] RSP: 0018:ffffc90000147de8 EFLAGS: 00000246
[   14.274382][    C2] RAX: 0000000000041227 RBX: 1ffff92000028fc1 RCX: ffffffffa5555a19
[   14.274385][    C2] RDX: 0000000000000000 RSI: ffffffffa6085f31 RDI: ffffffffa5850ce0
[   14.274387][    C2] RBP: 0000000000000000 R08: 0000000000000001 R09: ffffed1006c2667a
[   14.274388][    C2] R10: ffff8880361333d3 R11: 0000000000000000 R12: 0000000000000000
[   14.274390][    C2] R13: ffff888001bb2340 R14: dffffc0000000000 R15: 0000000000000000
[ 14.274394][ C2] ? ct_kernel_exit.constprop.0 (kernel/context_tracking.c:146) 
[ 14.274399][ C2] default_idle (./arch/x86/include/asm/paravirt.h:107 arch/x86/kernel/process.c:748) 
[ 14.274401][ C2] default_idle_call (./include/linux/cpuidle.h:143 kernel/sched/idle.c:118) 
[ 14.274403][ C2] cpuidle_idle_call (kernel/sched/idle.c:186) 
[ 14.274407][ C2] ? __pfx_cpuidle_idle_call (kernel/sched/idle.c:168) 
[ 14.274411][ C2] ? tsc_verify_tsc_adjust (arch/x86/kernel/tsc_sync.c:59) 
[ 14.274416][ C2] do_idle (kernel/sched/idle.c:325) 
[ 14.274420][ C2] cpu_startup_entry (kernel/sched/idle.c:422 (discriminator 1)) 
[ 14.274423][ C2] start_secondary (arch/x86/kernel/smpboot.c:203 arch/x86/kernel/smpboot.c:283) 
[ 14.274426][ C2] ? __pfx_start_secondary (arch/x86/kernel/smpboot.c:233) 
[ 14.274431][ C2] common_startup_64 (arch/x86/kernel/head_64.S:419) 
| [   14.290470][    C2] RCU nest depth: 0, expected: 0
| [   14.290661][    C2] INFO: lockdep is turned off.
| [   14.290855][    C2] Preemption disabled at:
| [ 14.290856][ C2] 0x0 
[   14.291205][    C2] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[   14.291206][    C2] Call Trace:
[   14.291208][    C2]  <IRQ>
[ 14.291210][ C2] dump_stack_lvl (lib/dump_stack.c:123) 
[ 14.291216][ C2] __might_resched (kernel/sched/core.c:8819) 
[ 14.291222][ C2] down_write (./include/linux/kernel.h:73 kernel/locking/rwsem.c:1576) 
[ 14.291225][ C2] ? __pfx_down_write (kernel/locking/rwsem.c:1575) 
[ 14.291228][ C2] ? simple_recursive_removal (./include/linux/dcache.h:345 fs/libfs.c:610) 
[ 14.291232][ C2] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:736) 
[ 14.291238][ C2] ? do_raw_spin_unlock (./arch/x86/include/asm/atomic.h:23 ./include/linux/atomic/atomic-arch-fallback.h:457 ./include/linux/atomic/atomic-instrumented.h:33 ./include/asm-generic/qspinlock.h:57 kernel/locking/spinlock_debug.c:101 kernel/locking/spinlock_debug.c:141) 
[ 14.291242][ C2] simple_recursive_removal (./include/linux/dcache.h:409 ./include/linux/dcache.h:424 ./include/linux/dcache.h:434 fs/libfs.c:616) 
[ 14.291245][ C2] ? __pfx_remove_one (fs/debugfs/inode.c:780) 
[ 14.291249][ C2] ? do_raw_spin_unlock (./arch/x86/include/asm/atomic.h:23 ./include/linux/atomic/atomic-arch-fallback.h:457 ./include/linux/atomic/atomic-instrumented.h:33 ./include/asm-generic/qspinlock.h:57 kernel/locking/spinlock_debug.c:101 kernel/locking/spinlock_debug.c:141) 
[ 14.291253][ C2] debugfs_remove (fs/debugfs/inode.c:806 fs/debugfs/inode.c:799) 
[ 14.291256][ C2] ref_tracker_dir_exit (lib/ref_tracker.c:423 lib/ref_tracker.c:195) 
[ 14.291260][ C2] ? __pfx_ref_tracker_free (lib/ref_tracker.c:253) 
[ 14.291263][ C2] ? __sk_destruct (./include/linux/instrumented.h:96 ./include/linux/atomic/atomic-instrumented.h:400 ./include/linux/refcount.h:389 ./include/linux/refcount.h:432 ./include/linux/refcount.h:450 ./include/net/net_namespace.h:287 ./include/net/net_namespace.h:390 net/core/sock.c:2333) 
[ 14.291267][ C2] ? rcu_do_batch (kernel/rcu/tree.c:2568) 
[ 14.291271][ C2] ? __pfx_ref_tracker_dir_exit (lib/ref_tracker.c:189) 
[ 14.291274][ C2] ? irq_exit_rcu (kernel/softirq.c:698) 
[ 14.291277][ C2] ? sysvec_apic_timer_interrupt (arch/x86/kernel/apic/apic.c:1049 arch/x86/kernel/apic/apic.c:1049) 
[ 14.291280][ C2] ? asm_sysvec_apic_timer_interrupt (./arch/x86/include/asm/idtentry.h:702) 
[ 14.291284][ C2] ? pv_native_safe_halt (arch/x86/kernel/paravirt.c:81) 
[ 14.291287][ C2] ? default_idle (./arch/x86/include/asm/paravirt.h:107 arch/x86/kernel/process.c:748) 
[ 14.291289][ C2] ? default_idle_call (./include/linux/cpuidle.h:143 kernel/sched/idle.c:118) 
[ 14.291291][ C2] ? cpuidle_idle_call (kernel/sched/idle.c:186) 
[ 14.291295][ C2] ? do_idle (kernel/sched/idle.c:325) 
[ 14.291298][ C2] ? cpu_startup_entry (kernel/sched/idle.c:422 (discriminator 1)) 
[ 14.291301][ C2] ? start_secondary (arch/x86/kernel/smpboot.c:203 arch/x86/kernel/smpboot.c:283) 
[ 14.291305][ C2] ? common_startup_64 (arch/x86/kernel/head_64.S:419) 
[ 14.291311][ C2] __put_net (net/core/net_namespace.c:732) 
[ 14.291314][ C2] __sk_destruct (./include/net/net_namespace.h:288 ./include/net/net_namespace.h:390 net/core/sock.c:2333) 
[ 14.291318][ C2] ? rcu_do_batch (kernel/rcu/tree.c:2568) 
[ 14.291320][ C2] rcu_do_batch (kernel/rcu/tree.c:2568) 
[ 14.291324][ C2] ? find_held_lock (kernel/locking/lockdep.c:5348) 
[ 14.291328][ C2] ? __pfx_rcu_do_batch (kernel/rcu/tree.c:2492) 
[ 14.291332][ C2] ? _raw_spin_unlock_irqrestore (./include/linux/spinlock_api_smp.h:151 kernel/locking/spinlock.c:194) 
[ 14.291335][ C2] ? lockdep_hardirqs_on (kernel/locking/lockdep.c:4473) 
[ 14.291339][ C2] ? _raw_spin_unlock_irqrestore (./arch/x86/include/asm/preempt.h:104 ./include/linux/spinlock_api_smp.h:152 kernel/locking/spinlock.c:194) 
[ 14.291343][ C2] rcu_core (kernel/rcu/tree.c:2826) 
[ 14.291346][ C2] handle_softirqs (kernel/softirq.c:579) 
[ 14.291353][ C2] __irq_exit_rcu (kernel/softirq.c:614 kernel/softirq.c:453 kernel/softirq.c:680) 
[ 14.291356][ C2] irq_exit_rcu (kernel/softirq.c:698) 
[ 14.291358][ C2] sysvec_apic_timer_interrupt (arch/x86/kernel/apic/apic.c:1049 arch/x86/kernel/apic/apic.c:1049) 
[   14.291361][    C2]  </IRQ>
[   14.291362][    C2]  <TASK>
[ 14.291364][ C2] asm_sysvec_apic_timer_interrupt (./arch/x86/include/asm/idtentry.h:702) 
[ 14.291366][ C2] RIP: 0010:pv_native_safe_halt (arch/x86/kernel/paravirt.c:81) 
[ 14.291370][ C2] Code: b0 b8 00 c3 cc cc cc cc 0f 1f 00 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 f3 0f 1e fa 66 90 0f 00 2d a3 d0 13 00 fb f4 <c3> cc cc cc cc 66 2e 0f 1f 84 00 00 00 00 00 66 90 90 90 90 90 90
All code
========
   0:	b0 b8                	mov    $0xb8,%al
   2:	00 c3                	add    %al,%bl
   4:	cc                   	int3
   5:	cc                   	int3
   6:	cc                   	int3
   7:	cc                   	int3
   8:	0f 1f 00             	nopl   (%rax)
   b:	90                   	nop
   c:	90                   	nop
   d:	90                   	nop
   e:	90                   	nop
   f:	90                   	nop
  10:	90                   	nop
  11:	90                   	nop
  12:	90                   	nop
  13:	90                   	nop
  14:	90                   	nop
  15:	90                   	nop
  16:	90                   	nop
  17:	90                   	nop
  18:	90                   	nop
  19:	90                   	nop
  1a:	90                   	nop
  1b:	f3 0f 1e fa          	endbr64
  1f:	66 90                	xchg   %ax,%ax
  21:	0f 00 2d a3 d0 13 00 	verw   0x13d0a3(%rip)        # 0x13d0cb
  28:	fb                   	sti
  29:	f4                   	hlt
  2a:*	c3                   	ret		<-- trapping instruction
  2b:	cc                   	int3
  2c:	cc                   	int3
  2d:	cc                   	int3
  2e:	cc                   	int3
  2f:	66 2e 0f 1f 84 00 00 	cs nopw 0x0(%rax,%rax,1)
  36:	00 00 00 
  39:	66 90                	xchg   %ax,%ax
  3b:	90                   	nop
  3c:	90                   	nop
  3d:	90                   	nop
  3e:	90                   	nop
  3f:	90                   	nop

Code starting with the faulting instruction
===========================================
   0:	c3                   	ret
   1:	cc                   	int3
   2:	cc                   	int3
   3:	cc                   	int3
   4:	cc                   	int3
   5:	66 2e 0f 1f 84 00 00 	cs nopw 0x0(%rax,%rax,1)
   c:	00 00 00 
   f:	66 90                	xchg   %ax,%ax
  11:	90                   	nop
  12:	90                   	nop
  13:	90                   	nop
  14:	90                   	nop
  15:	90                   	nop
[   14.291373][    C2] RSP: 0018:ffffc90000147de8 EFLAGS: 00000246
[   14.291376][    C2] RAX: 0000000000041227 RBX: 1ffff92000028fc1 RCX: ffffffffa5555a19
[   14.291378][    C2] RDX: 0000000000000000 RSI: ffffffffa6085f31 RDI: ffffffffa5850ce0
[   14.291379][    C2] RBP: 0000000000000000 R08: 0000000000000001 R09: ffffed1006c2667a
[   14.291381][    C2] R10: ffff8880361333d3 R11: 0000000000000000 R12: 0000000000000000
[   14.291383][    C2] R13: ffff888001bb2340 R14: dffffc0000000000 R15: 0000000000000000
[ 14.291386][ C2] ? ct_kernel_exit.constprop.0 (kernel/context_tracking.c:146) 
[ 14.291392][ C2] default_idle (./arch/x86/include/asm/paravirt.h:107 arch/x86/kernel/process.c:748) 
[ 14.291394][ C2] default_idle_call (./include/linux/cpuidle.h:143 kernel/sched/idle.c:118) 
[ 14.291396][ C2] cpuidle_idle_call (kernel/sched/idle.c:186) 
[ 14.291400][ C2] ? __pfx_cpuidle_idle_call (kernel/sched/idle.c:168) 
[ 14.291404][ C2] ? tsc_verify_tsc_adjust (arch/x86/kernel/tsc_sync.c:59) 
[ 14.291409][ C2] do_idle (kernel/sched/idle.c:325) 
[ 14.291413][ C2] cpu_startup_entry (kernel/sched/idle.c:422 (discriminator 1)) 
[ 14.291416][ C2] start_secondary (arch/x86/kernel/smpboot.c:203 arch/x86/kernel/smpboot.c:283) 
[ 14.291420][ C2] ? __pfx_start_secondary (arch/x86/kernel/smpboot.c:233) 
[ 14.291424][ C2] common_startup_64 (arch/x86/kernel/head_64.S:419) 
| [   15.846804][    C0] INFO: lockdep is turned off.
| [   15.847000][    C0] Preemption disabled at:
| [ 15.847001][ C0] schedule_preempt_disabled (kernel/sched/core.c:6919) 
| [   15.847457][    C0] Tainted: [W]=WARN
[   15.847458][    C0] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[   15.847461][    C0] Call Trace:
[   15.847462][    C0]  <IRQ>
[ 15.847464][ C0] dump_stack_lvl (lib/dump_stack.c:123) 
[ 15.847470][ C0] __might_resched (kernel/sched/core.c:8819) 
[ 15.847476][ C0] down_write (./include/linux/kernel.h:73 kernel/locking/rwsem.c:1576) 
[ 15.847479][ C0] ? __pfx_down_write (kernel/locking/rwsem.c:1575) 
[ 15.847482][ C0] ? simple_recursive_removal (./include/linux/dcache.h:345 fs/libfs.c:610) 
[ 15.847487][ C0] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:736) 
[ 15.847492][ C0] ? do_raw_spin_unlock (./arch/x86/include/asm/atomic.h:23 ./include/linux/atomic/atomic-arch-fallback.h:457 ./include/linux/atomic/atomic-instrumented.h:33 ./include/asm-generic/qspinlock.h:57 kernel/locking/spinlock_debug.c:101 kernel/locking/spinlock_debug.c:141) 
[ 15.847497][ C0] simple_recursive_removal (./include/linux/dcache.h:409 ./include/linux/dcache.h:424 ./include/linux/dcache.h:434 fs/libfs.c:616) 
[ 15.847500][ C0] ? __pfx_remove_one (fs/debugfs/inode.c:780) 
[ 15.847504][ C0] ? do_raw_spin_unlock (./arch/x86/include/asm/atomic.h:23 ./include/linux/atomic/atomic-arch-fallback.h:457 ./include/linux/atomic/atomic-instrumented.h:33 ./include/asm-generic/qspinlock.h:57 kernel/locking/spinlock_debug.c:101 kernel/locking/spinlock_debug.c:141) 
[ 15.847508][ C0] debugfs_remove (fs/debugfs/inode.c:806 fs/debugfs/inode.c:799) 
[ 15.847511][ C0] ref_tracker_dir_exit (lib/ref_tracker.c:423 lib/ref_tracker.c:195) 
[ 15.847516][ C0] ? __pfx_ref_tracker_free (lib/ref_tracker.c:253) 
[ 15.847519][ C0] ? __sk_destruct (./include/linux/instrumented.h:96 ./include/linux/atomic/atomic-instrumented.h:400 ./include/linux/refcount.h:389 ./include/linux/refcount.h:432 ./include/linux/refcount.h:450 ./include/net/net_namespace.h:287 ./include/net/net_namespace.h:390 net/core/sock.c:2333) 
[ 15.847524][ C0] ? rcu_do_batch (kernel/rcu/tree.c:2568) 
[ 15.847528][ C0] ? __pfx_ref_tracker_dir_exit (lib/ref_tracker.c:189) 
[ 15.847531][ C0] ? irq_exit_rcu (kernel/softirq.c:698) 
[ 15.847535][ C0] ? sysvec_apic_timer_interrupt (arch/x86/kernel/apic/apic.c:1049 arch/x86/kernel/apic/apic.c:1049) 
[ 15.847539][ C0] ? asm_sysvec_apic_timer_interrupt (./arch/x86/include/asm/idtentry.h:702) 
[ 15.847543][ C0] ? pv_native_safe_halt (arch/x86/kernel/paravirt.c:81) 
[ 15.847546][ C0] ? default_idle (./arch/x86/include/asm/paravirt.h:107 arch/x86/kernel/process.c:748) 
[ 15.847548][ C0] ? default_idle_call (./include/linux/cpuidle.h:143 kernel/sched/idle.c:118) 
[ 15.847551][ C0] ? cpuidle_idle_call (kernel/sched/idle.c:186) 
[ 15.847555][ C0] ? do_idle (kernel/sched/idle.c:325) 
[ 15.847558][ C0] ? cpu_startup_entry (kernel/sched/idle.c:422 (discriminator 1)) 
[ 15.847561][ C0] ? rest_init (./include/linux/rcupdate.h:842 init/main.c:714) 
[ 15.847564][ C0] ? start_kernel (init/main.c:1049 (discriminator 1)) 
[ 15.847569][ C0] ? bpf_sk_storage_free (./include/linux/rcupdate.h:341 ./include/linux/rcupdate.h:871 net/core/bpf_sk_storage.c:61) 
[ 15.847573][ C0] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:736) 
[ 15.847578][ C0] __put_net (net/core/net_namespace.c:732) 
[ 15.847581][ C0] __sk_destruct (./include/net/net_namespace.h:288 ./include/net/net_namespace.h:390 net/core/sock.c:2333) 
[ 15.847584][ C0] ? rcu_do_batch (kernel/rcu/tree.c:2568) 
[ 15.847587][ C0] rcu_do_batch (kernel/rcu/tree.c:2568) 
[ 15.847592][ C0] ? __pfx_rcu_do_batch (kernel/rcu/tree.c:2492) 
[ 15.847596][ C0] ? trace_irq_enable.constprop.0 (./include/trace/events/preemptirq.h:40) 
[ 15.847601][ C0] ? _raw_spin_unlock_irqrestore (./arch/x86/include/asm/preempt.h:104 ./include/linux/spinlock_api_smp.h:152 kernel/locking/spinlock.c:194) 
[ 15.847606][ C0] rcu_core (kernel/rcu/tree.c:2826) 
[ 15.847609][ C0] handle_softirqs (kernel/softirq.c:579) 
[ 15.847614][ C0] __irq_exit_rcu (kernel/softirq.c:614 kernel/softirq.c:453 kernel/softirq.c:680) 
[ 15.847617][ C0] irq_exit_rcu (kernel/softirq.c:698) 
[ 15.847619][ C0] sysvec_apic_timer_interrupt (arch/x86/kernel/apic/apic.c:1049 arch/x86/kernel/apic/apic.c:1049) 
[   15.847623][    C0]  </IRQ>
[   15.847624][    C0]  <TASK>
[ 15.847625][ C0] asm_sysvec_apic_timer_interrupt (./arch/x86/include/asm/idtentry.h:702) 
[ 15.847628][ C0] RIP: 0010:pv_native_safe_halt (arch/x86/kernel/paravirt.c:81) 
[ 15.847631][ C0] Code: b0 b8 00 c3 cc cc cc cc 0f 1f 00 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 f3 0f 1e fa 66 90 0f 00 2d a3 d0 13 00 fb f4 <c3> cc cc cc cc 66 2e 0f 1f 84 00 00 00 00 00 66 90 90 90 90 90 90
All code
========
   0:	b0 b8                	mov    $0xb8,%al
   2:	00 c3                	add    %al,%bl
   4:	cc                   	int3
   5:	cc                   	int3
   6:	cc                   	int3
   7:	cc                   	int3
   8:	0f 1f 00             	nopl   (%rax)
   b:	90                   	nop
   c:	90                   	nop
   d:	90                   	nop
   e:	90                   	nop
   f:	90                   	nop
  10:	90                   	nop
  11:	90                   	nop
  12:	90                   	nop
  13:	90                   	nop
  14:	90                   	nop
  15:	90                   	nop
  16:	90                   	nop
  17:	90                   	nop
  18:	90                   	nop
  19:	90                   	nop
  1a:	90                   	nop
  1b:	f3 0f 1e fa          	endbr64
  1f:	66 90                	xchg   %ax,%ax
  21:	0f 00 2d a3 d0 13 00 	verw   0x13d0a3(%rip)        # 0x13d0cb
  28:	fb                   	sti
  29:	f4                   	hlt
  2a:*	c3                   	ret		<-- trapping instruction
  2b:	cc                   	int3
  2c:	cc                   	int3
  2d:	cc                   	int3
  2e:	cc                   	int3
  2f:	66 2e 0f 1f 84 00 00 	cs nopw 0x0(%rax,%rax,1)
  36:	00 00 00 
  39:	66 90                	xchg   %ax,%ax
  3b:	90                   	nop
  3c:	90                   	nop
  3d:	90                   	nop
  3e:	90                   	nop
  3f:	90                   	nop

Code starting with the faulting instruction
===========================================
   0:	c3                   	ret
   1:	cc                   	int3
   2:	cc                   	int3
   3:	cc                   	int3
   4:	cc                   	int3
   5:	66 2e 0f 1f 84 00 00 	cs nopw 0x0(%rax,%rax,1)
   c:	00 00 00 
   f:	66 90                	xchg   %ax,%ax
  11:	90                   	nop
  12:	90                   	nop
  13:	90                   	nop
  14:	90                   	nop
  15:	90                   	nop
[   15.847634][    C0] RSP: 0018:ffffffffa6207df8 EFLAGS: 00000246
[   15.847638][    C0] RAX: 0000000000000000 RBX: 1ffffffff4c40fc3 RCX: ffffffffa5555a19
[   15.847640][    C0] RDX: ffffed1006c0667b RSI: ffffffffa5850c60 RDI: ffffffffa2d84d8f
[   15.847641][    C0] RBP: 0000000000000000 R08: 0000000000000000 R09: ffffed1006c0667a
[   15.847643][    C0] R10: ffff8880360333d3 R11: ffff88800aeb0558 R12: 0000000000000000
[   15.847645][    C0] R13: ffffffffa621f240 R14: dffffc0000000000 R15: 0000000000014770
[ 15.847649][ C0] ? ct_kernel_exit.constprop.0 (kernel/context_tracking.c:146) 
[ 15.847653][ C0] ? cpuidle_idle_call (kernel/sched/idle.c:186) 
[ 15.847657][ C0] default_idle (./arch/x86/include/asm/paravirt.h:107 arch/x86/kernel/process.c:748) 
[ 15.847659][ C0] default_idle_call (./include/linux/cpuidle.h:143 kernel/sched/idle.c:118) 
[ 15.847662][ C0] cpuidle_idle_call (kernel/sched/idle.c:186) 
[ 15.847665][ C0] ? __pfx_cpuidle_idle_call (kernel/sched/idle.c:168) 
[ 15.847670][ C0] ? tsc_verify_tsc_adjust (arch/x86/kernel/tsc_sync.c:59) 
[ 15.847677][ C0] do_idle (kernel/sched/idle.c:325) 
[ 15.847681][ C0] cpu_startup_entry (kernel/sched/idle.c:422 (discriminator 1)) 
[ 15.847684][ C0] rest_init (./include/linux/rcupdate.h:842 init/main.c:714) 
[ 15.847687][ C0] start_kernel (init/main.c:1049 (discriminator 1)) 
[ 15.847691][ C0] x86_64_start_reservations (arch/x86/kernel/head64.c:501) 
[ 15.847695][ C0] x86_64_start_kernel (arch/x86/kernel/head64.c:443 (discriminator 17)) 


Finger prints:
mark_lock_irq:mark_lock:mark_usage:__lock_acquire:_raw_spin_lock
__might_resched:down_write:simple_recursive_removal:debugfs_remove:ref_tracker_dir_exit
schedule_preempt_disabled:dump_stack_lvl:__might_resched:down_write:simple_recursive_removal