======================================
| [   15.035968][    C3] 1 lock held by swapper/3/0:
| [ 15.036157][ C3] #0: ffffffffb65749c0 (rcu_callback){....}-{0:0}, at: rcu_do_batch (./include/linux/rcupdate.h:331 kernel/rcu/tree.c:2562) 
| [   15.036497][    C3]
| [   15.036497][    C3] stack backtrace:
[   15.036734][    C3] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[   15.036737][    C3] Call Trace:
[   15.036739][    C3]  <IRQ>
[ 15.036741][ C3] dump_stack_lvl (lib/dump_stack.c:123) 
[ 15.036746][ C3] print_usage_bug.part.0 (kernel/locking/lockdep.c:4046) 
[ 15.036751][ C3] mark_lock_irq (kernel/locking/lockdep.c:4011 kernel/locking/lockdep.c:4057 kernel/locking/lockdep.c:4268) 
[ 15.036757][ C3] ? __pfx_unwind_next_frame (arch/x86/kernel/unwind_orc.c:469) 
[ 15.036762][ C3] ? save_trace (kernel/locking/lockdep.c:594) 
[ 15.036767][ C3] mark_lock (kernel/locking/lockdep.c:4754) 
[ 15.036771][ C3] mark_usage (kernel/locking/lockdep.c:4643) 
[ 15.036775][ C3] __lock_acquire (kernel/locking/lockdep.c:5189) 
[ 15.036780][ C3] lock_acquire.part.0 (kernel/locking/lockdep.c:472 kernel/locking/lockdep.c:5868) 
[ 15.036783][ C3] ? simple_pin_fs (fs/libfs.c:1066) 
[ 15.036786][ C3] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:736) 
[ 15.036791][ C3] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5829) 
[ 15.036793][ C3] ? simple_pin_fs (fs/libfs.c:1066) 
[ 15.036797][ C3] _raw_spin_lock (./include/linux/spinlock_api_smp.h:134 kernel/locking/spinlock.c:154) 
[ 15.036800][ C3] ? simple_pin_fs (fs/libfs.c:1066) 
[ 15.036802][ C3] simple_pin_fs (fs/libfs.c:1066) 
[ 15.036805][ C3] debugfs_remove (fs/debugfs/inode.c:805 fs/debugfs/inode.c:799) 
[ 15.036808][ C3] ref_tracker_dir_exit (lib/ref_tracker.c:423 lib/ref_tracker.c:195) 
[ 15.036814][ C3] ? __pfx_ref_tracker_free (lib/ref_tracker.c:253) 
[ 15.036817][ C3] ? __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:2366) 
[ 15.036822][ C3] ? rcu_do_batch (./include/linux/rcupdate.h:341 kernel/rcu/tree.c:2570) 
[ 15.036825][ C3] ? __pfx_ref_tracker_dir_exit (lib/ref_tracker.c:189) 
[ 15.036828][ C3] ? irq_exit_rcu (kernel/softirq.c:698) 
[ 15.036831][ C3] ? sysvec_apic_timer_interrupt (arch/x86/kernel/apic/apic.c:1049 arch/x86/kernel/apic/apic.c:1049) 
[ 15.036835][ C3] ? asm_sysvec_apic_timer_interrupt (./arch/x86/include/asm/idtentry.h:702) 
[ 15.036839][ C3] ? pv_native_safe_halt (arch/x86/kernel/paravirt.c:81) 
[ 15.036842][ C3] ? default_idle (./arch/x86/include/asm/paravirt.h:107 arch/x86/kernel/process.c:748) 
[ 15.036844][ C3] ? default_idle_call (./include/linux/cpuidle.h:143 kernel/sched/idle.c:118) 
[ 15.036847][ C3] ? cpuidle_idle_call (kernel/sched/idle.c:186) 
[ 15.036852][ C3] ? do_idle (kernel/sched/idle.c:325) 
[ 15.036855][ C3] ? cpu_startup_entry (kernel/sched/idle.c:422 (discriminator 1)) 
[ 15.036858][ C3] ? start_secondary (arch/x86/kernel/smpboot.c:203 arch/x86/kernel/smpboot.c:283) 
[ 15.036863][ C3] ? common_startup_64 (arch/x86/kernel/head_64.S:419) 
[ 15.036869][ C3] __put_net (net/core/net_namespace.c:732) 
[ 15.036873][ C3] __sk_destruct (./include/net/net_namespace.h:288 ./include/net/net_namespace.h:390 net/core/sock.c:2366) 
[ 15.036877][ C3] ? rcu_do_batch (kernel/rcu/tree.c:2568) 
[ 15.036880][ C3] rcu_do_batch (./include/linux/rcupdate.h:341 kernel/rcu/tree.c:2570) 
[ 15.036885][ C3] ? __pfx_rcu_do_batch (kernel/rcu/tree.c:2492) 
[ 15.036889][ C3] ? __lock_release (kernel/locking/lockdep.c:5534) 
[ 15.036892][ C3] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:736) 
[ 15.036896][ C3] ? _raw_spin_unlock_irqrestore (./include/linux/spinlock_api_smp.h:151 kernel/locking/spinlock.c:194) 
[ 15.036900][ C3] rcu_core (kernel/rcu/tree.c:2826) 
[ 15.036904][ C3] handle_softirqs (kernel/softirq.c:579) 
[ 15.036909][ C3] __irq_exit_rcu (kernel/softirq.c:614 kernel/softirq.c:453 kernel/softirq.c:680) 
[ 15.036911][ C3] irq_exit_rcu (kernel/softirq.c:698) 
[ 15.036914][ C3] sysvec_apic_timer_interrupt (arch/x86/kernel/apic/apic.c:1049 arch/x86/kernel/apic/apic.c:1049) 
[   15.036917][    C3]  </IRQ>
[   15.036918][    C3]  <TASK>
[ 15.036920][ C3] asm_sysvec_apic_timer_interrupt (./arch/x86/include/asm/idtentry.h:702) 
[ 15.036922][ C3] RIP: 0010:pv_native_safe_halt (arch/x86/kernel/paravirt.c:81) 
[ 15.036926][ C3] Code: 60 b8 00 e9 c3 57 02 00 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 c3 75 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:	60                   	(bad)
   1:	b8 00 e9 c3 57       	mov    $0x57c3e900,%eax
   6:	02 00                	add    (%rax),%al
   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 c3 75 13 00 	verw   0x1375c3(%rip)        # 0x1375eb
  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
[   15.036929][    C3] RSP: 0018:ffffc90000157de8 EFLAGS: 00000246
[   15.036932][    C3] RAX: 0000000000044233 RBX: 1ffff9200002afc1 RCX: ffffffffb555ba19
[   15.036934][    C3] RDX: 0000000000000000 RSI: ffffffffb6087785 RDI: ffffffffb5851260
[   15.036936][    C3] RBP: 0000000000000000 R08: 0000000000000001 R09: ffffed1006c3667a
[   15.036938][    C3] R10: ffff8880361b33d3 R11: 0000000000000000 R12: 0000000000000000
[   15.036939][    C3] R13: ffff888001bf4640 R14: dffffc0000000000 R15: 0000000000000000
[ 15.036943][ C3] ? ct_kernel_exit.constprop.0 (kernel/context_tracking.c:146) 
[ 15.036948][ C3] default_idle (./arch/x86/include/asm/paravirt.h:107 arch/x86/kernel/process.c:748) 
[ 15.036950][ C3] default_idle_call (./include/linux/cpuidle.h:143 kernel/sched/idle.c:118) 
[ 15.036952][ C3] cpuidle_idle_call (kernel/sched/idle.c:186) 
[ 15.036956][ C3] ? __pfx_cpuidle_idle_call (kernel/sched/idle.c:168) 
[ 15.036961][ C3] ? tsc_verify_tsc_adjust (arch/x86/kernel/tsc_sync.c:59) 
[ 15.036966][ C3] do_idle (kernel/sched/idle.c:325) 
[ 15.036970][ C3] cpu_startup_entry (kernel/sched/idle.c:422 (discriminator 1)) 
[ 15.036973][ C3] start_secondary (arch/x86/kernel/smpboot.c:203 arch/x86/kernel/smpboot.c:283) 
[ 15.036977][ C3] ? __pfx_start_secondary (arch/x86/kernel/smpboot.c:233) 
[ 15.036982][ C3] common_startup_64 (arch/x86/kernel/head_64.S:419) 
| [   15.052625][    C3] RCU nest depth: 0, expected: 0
| [   15.052798][    C3] INFO: lockdep is turned off.
| [   15.052975][    C3] Preemption disabled at:
| [ 15.052976][ C3] 0x0 
[   15.053400][    C3] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[   15.053402][    C3] Call Trace:
[   15.053403][    C3]  <IRQ>
[ 15.053405][ C3] dump_stack_lvl (lib/dump_stack.c:123) 
[ 15.053412][ C3] __might_resched (kernel/sched/core.c:8819) 
[ 15.053419][ C3] down_write (./include/linux/kernel.h:73 kernel/locking/rwsem.c:1576) 
[ 15.053423][ C3] ? __pfx_down_write (kernel/locking/rwsem.c:1575) 
[ 15.053426][ C3] ? simple_recursive_removal (./include/linux/dcache.h:345 fs/libfs.c:610) 
[ 15.053430][ C3] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:736) 
[ 15.053436][ C3] ? 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) 
[ 15.053441][ C3] simple_recursive_removal (./include/linux/dcache.h:409 ./include/linux/dcache.h:424 ./include/linux/dcache.h:434 fs/libfs.c:616) 
[ 15.053444][ C3] ? __pfx_remove_one (fs/debugfs/inode.c:780) 
[ 15.053451][ C3] ? 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) 
[ 15.053455][ C3] debugfs_remove (fs/debugfs/inode.c:806 fs/debugfs/inode.c:799) 
[ 15.053458][ C3] ref_tracker_dir_exit (lib/ref_tracker.c:423 lib/ref_tracker.c:195) 
[ 15.053463][ C3] ? __pfx_ref_tracker_free (lib/ref_tracker.c:253) 
[ 15.053466][ C3] ? __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:2366) 
[ 15.053471][ C3] ? rcu_do_batch (./include/linux/rcupdate.h:341 kernel/rcu/tree.c:2570) 
[ 15.053475][ C3] ? __pfx_ref_tracker_dir_exit (lib/ref_tracker.c:189) 
[ 15.053478][ C3] ? irq_exit_rcu (kernel/softirq.c:698) 
[ 15.053481][ C3] ? sysvec_apic_timer_interrupt (arch/x86/kernel/apic/apic.c:1049 arch/x86/kernel/apic/apic.c:1049) 
[ 15.053486][ C3] ? asm_sysvec_apic_timer_interrupt (./arch/x86/include/asm/idtentry.h:702) 
[ 15.053489][ C3] ? pv_native_safe_halt (arch/x86/kernel/paravirt.c:81) 
[ 15.053492][ C3] ? default_idle (./arch/x86/include/asm/paravirt.h:107 arch/x86/kernel/process.c:748) 
[ 15.053495][ C3] ? default_idle_call (./include/linux/cpuidle.h:143 kernel/sched/idle.c:118) 
[ 15.053497][ C3] ? cpuidle_idle_call (kernel/sched/idle.c:186) 
[ 15.053502][ C3] ? do_idle (kernel/sched/idle.c:325) 
[ 15.053505][ C3] ? cpu_startup_entry (kernel/sched/idle.c:422 (discriminator 1)) 
[ 15.053508][ C3] ? start_secondary (arch/x86/kernel/smpboot.c:203 arch/x86/kernel/smpboot.c:283) 
[ 15.053513][ C3] ? common_startup_64 (arch/x86/kernel/head_64.S:419) 
[ 15.053519][ C3] __put_net (net/core/net_namespace.c:732) 
[ 15.053521][ C3] __sk_destruct (./include/net/net_namespace.h:288 ./include/net/net_namespace.h:390 net/core/sock.c:2366) 
[ 15.053526][ C3] ? rcu_do_batch (kernel/rcu/tree.c:2568) 
[ 15.053528][ C3] rcu_do_batch (./include/linux/rcupdate.h:341 kernel/rcu/tree.c:2570) 
[ 15.053534][ C3] ? __pfx_rcu_do_batch (kernel/rcu/tree.c:2492) 
[ 15.053537][ C3] ? __lock_release (kernel/locking/lockdep.c:5534) 
[ 15.053540][ C3] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:736) 
[ 15.053543][ C3] ? _raw_spin_unlock_irqrestore (./include/linux/spinlock_api_smp.h:151 kernel/locking/spinlock.c:194) 
[ 15.053549][ C3] rcu_core (kernel/rcu/tree.c:2826) 
[ 15.053552][ C3] handle_softirqs (kernel/softirq.c:579) 
[ 15.053557][ C3] __irq_exit_rcu (kernel/softirq.c:614 kernel/softirq.c:453 kernel/softirq.c:680) 
[ 15.053559][ C3] irq_exit_rcu (kernel/softirq.c:698) 
[ 15.053561][ C3] sysvec_apic_timer_interrupt (arch/x86/kernel/apic/apic.c:1049 arch/x86/kernel/apic/apic.c:1049) 
[   15.053565][    C3]  </IRQ>
[   15.053566][    C3]  <TASK>
[ 15.053567][ C3] asm_sysvec_apic_timer_interrupt (./arch/x86/include/asm/idtentry.h:702) 
[ 15.053570][ C3] RIP: 0010:pv_native_safe_halt (arch/x86/kernel/paravirt.c:81) 
[ 15.053574][ C3] Code: 60 b8 00 e9 c3 57 02 00 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 c3 75 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:	60                   	(bad)
   1:	b8 00 e9 c3 57       	mov    $0x57c3e900,%eax
   6:	02 00                	add    (%rax),%al
   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 c3 75 13 00 	verw   0x1375c3(%rip)        # 0x1375eb
  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
[   15.053576][    C3] RSP: 0018:ffffc90000157de8 EFLAGS: 00000246
[   15.053579][    C3] RAX: 0000000000044233 RBX: 1ffff9200002afc1 RCX: ffffffffb555ba19
[   15.053582][    C3] RDX: 0000000000000000 RSI: ffffffffb6087785 RDI: ffffffffb5851260
[   15.053583][    C3] RBP: 0000000000000000 R08: 0000000000000001 R09: ffffed1006c3667a
[   15.053585][    C3] R10: ffff8880361b33d3 R11: 0000000000000000 R12: 0000000000000000
[   15.053587][    C3] R13: ffff888001bf4640 R14: dffffc0000000000 R15: 0000000000000000
[ 15.053591][ C3] ? ct_kernel_exit.constprop.0 (kernel/context_tracking.c:146) 
[ 15.053596][ C3] default_idle (./arch/x86/include/asm/paravirt.h:107 arch/x86/kernel/process.c:748) 
[ 15.053598][ C3] default_idle_call (./include/linux/cpuidle.h:143 kernel/sched/idle.c:118) 
[ 15.053600][ C3] cpuidle_idle_call (kernel/sched/idle.c:186) 
[ 15.053604][ C3] ? __pfx_cpuidle_idle_call (kernel/sched/idle.c:168) 
[ 15.053608][ C3] ? tsc_verify_tsc_adjust (arch/x86/kernel/tsc_sync.c:59) 
[ 15.053614][ C3] do_idle (kernel/sched/idle.c:325) 
[ 15.053618][ C3] cpu_startup_entry (kernel/sched/idle.c:422 (discriminator 1)) 
[ 15.053621][ C3] start_secondary (arch/x86/kernel/smpboot.c:203 arch/x86/kernel/smpboot.c:283) 
[ 15.053625][ C3] ? __pfx_start_secondary (arch/x86/kernel/smpboot.c:233) 
[ 15.053630][ C3] common_startup_64 (arch/x86/kernel/head_64.S:419) 
| [   16.701537][    C2] INFO: lockdep is turned off.
| [   16.701723][    C2] Preemption disabled at:
| [ 16.701725][ C2] 0x0 
| [   16.702071][    C2] Tainted: [W]=WARN
[   16.702073][    C2] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[   16.702075][    C2] Call Trace:
[   16.702076][    C2]  <IRQ>
[ 16.702079][ C2] dump_stack_lvl (lib/dump_stack.c:123) 
[ 16.702087][ C2] __might_resched (kernel/sched/core.c:8819) 
[ 16.702093][ C2] down_write (./include/linux/kernel.h:73 kernel/locking/rwsem.c:1576) 
[ 16.702098][ C2] ? __pfx_down_write (kernel/locking/rwsem.c:1575) 
[ 16.702101][ C2] ? simple_recursive_removal (./include/linux/dcache.h:345 fs/libfs.c:610) 
[ 16.702105][ C2] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:736) 
[ 16.702112][ 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) 
[ 16.702117][ C2] simple_recursive_removal (./include/linux/dcache.h:409 ./include/linux/dcache.h:424 ./include/linux/dcache.h:434 fs/libfs.c:616) 
[ 16.702119][ C2] ? __pfx_remove_one (fs/debugfs/inode.c:780) 
[ 16.702124][ 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) 
[ 16.702128][ C2] debugfs_remove (fs/debugfs/inode.c:806 fs/debugfs/inode.c:799) 
[ 16.702131][ C2] ref_tracker_dir_exit (lib/ref_tracker.c:423 lib/ref_tracker.c:195) 
[ 16.702136][ C2] ? __pfx_ref_tracker_free (lib/ref_tracker.c:253) 
[ 16.702139][ 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:2366) 
[ 16.702145][ C2] ? rcu_do_batch (./include/linux/rcupdate.h:341 kernel/rcu/tree.c:2570) 
[ 16.702149][ C2] ? __pfx_ref_tracker_dir_exit (lib/ref_tracker.c:189) 
[ 16.702152][ C2] ? irq_exit_rcu (kernel/softirq.c:698) 
[ 16.702156][ C2] ? sysvec_apic_timer_interrupt (arch/x86/kernel/apic/apic.c:1049 arch/x86/kernel/apic/apic.c:1049) 
[ 16.702161][ C2] ? asm_sysvec_apic_timer_interrupt (./arch/x86/include/asm/idtentry.h:702) 
[ 16.702165][ C2] ? pv_native_safe_halt (arch/x86/kernel/paravirt.c:81) 
[ 16.702168][ C2] ? default_idle (./arch/x86/include/asm/paravirt.h:107 arch/x86/kernel/process.c:748) 
[ 16.702171][ C2] ? default_idle_call (./include/linux/cpuidle.h:143 kernel/sched/idle.c:118) 
[ 16.702173][ C2] ? cpuidle_idle_call (kernel/sched/idle.c:186) 
[ 16.702178][ C2] ? do_idle (kernel/sched/idle.c:325) 
[ 16.702181][ C2] ? cpu_startup_entry (kernel/sched/idle.c:422 (discriminator 1)) 
[ 16.702184][ C2] ? start_secondary (arch/x86/kernel/smpboot.c:203 arch/x86/kernel/smpboot.c:283) 
[ 16.702188][ C2] ? common_startup_64 (arch/x86/kernel/head_64.S:419) 
[ 16.702192][ C2] ? bpf_sk_storage_free (./include/linux/rcupdate.h:341 ./include/linux/rcupdate.h:871 net/core/bpf_sk_storage.c:61) 
[ 16.702197][ C2] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:736) 
[ 16.702201][ C2] __put_net (net/core/net_namespace.c:732) 
[ 16.702205][ C2] __sk_destruct (./include/net/net_namespace.h:288 ./include/net/net_namespace.h:390 net/core/sock.c:2366) 
[ 16.702209][ C2] ? rcu_do_batch (kernel/rcu/tree.c:2568) 
[ 16.702212][ C2] rcu_do_batch (./include/linux/rcupdate.h:341 kernel/rcu/tree.c:2570) 
[ 16.702217][ C2] ? __pfx_rcu_do_batch (kernel/rcu/tree.c:2492) 
[ 16.702221][ C2] ? trace_irq_enable.constprop.0 (./include/trace/events/preemptirq.h:40) 
[ 16.702226][ C2] ? _raw_spin_unlock_irqrestore (./arch/x86/include/asm/preempt.h:104 ./include/linux/spinlock_api_smp.h:152 kernel/locking/spinlock.c:194) 
[ 16.702232][ C2] rcu_core (kernel/rcu/tree.c:2826) 
[ 16.702236][ C2] handle_softirqs (kernel/softirq.c:579) 
[ 16.702240][ C2] __irq_exit_rcu (kernel/softirq.c:614 kernel/softirq.c:453 kernel/softirq.c:680) 
[ 16.702243][ C2] irq_exit_rcu (kernel/softirq.c:698) 
[ 16.702245][ C2] sysvec_apic_timer_interrupt (arch/x86/kernel/apic/apic.c:1049 arch/x86/kernel/apic/apic.c:1049) 
[   16.702249][    C2]  </IRQ>
[   16.702250][    C2]  <TASK>
[ 16.702251][ C2] asm_sysvec_apic_timer_interrupt (./arch/x86/include/asm/idtentry.h:702) 
[ 16.702254][ C2] RIP: 0010:pv_native_safe_halt (arch/x86/kernel/paravirt.c:81) 
[ 16.702258][ C2] Code: 60 b8 00 e9 c3 57 02 00 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 c3 75 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:	60                   	(bad)
   1:	b8 00 e9 c3 57       	mov    $0x57c3e900,%eax
   6:	02 00                	add    (%rax),%al
   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 c3 75 13 00 	verw   0x1375c3(%rip)        # 0x1375eb
  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
[   16.702261][    C2] RSP: 0018:ffffc90000147de8 EFLAGS: 00000246
[   16.702265][    C2] RAX: 0000000000000002 RBX: 1ffff92000028fc1 RCX: ffffffffb555ba19
[   16.702267][    C2] RDX: ffffed1006c2667b RSI: ffffffffb58511e0 RDI: ffffffffb2d8633f
[   16.702269][    C2] RBP: 0000000000000000 R08: 0000000000000000 R09: ffffed1006c2667a
[   16.702271][    C2] R10: ffff8880361333d3 R11: ffffffffb8eb4290 R12: 0000000000000000
[   16.702272][    C2] R13: ffff888001bf2340 R14: dffffc0000000000 R15: 0000000000000000
[ 16.702276][ C2] ? ct_kernel_exit.constprop.0 (kernel/context_tracking.c:146) 
[ 16.702279][ C2] ? cpuidle_idle_call (kernel/sched/idle.c:186) 
[ 16.702284][ C2] default_idle (./arch/x86/include/asm/paravirt.h:107 arch/x86/kernel/process.c:748) 
[ 16.702286][ C2] default_idle_call (./include/linux/cpuidle.h:143 kernel/sched/idle.c:118) 
[ 16.702289][ C2] cpuidle_idle_call (kernel/sched/idle.c:186) 
[ 16.702292][ C2] ? __pfx_cpuidle_idle_call (kernel/sched/idle.c:168) 
[ 16.702297][ C2] ? tsc_verify_tsc_adjust (arch/x86/kernel/tsc_sync.c:59) 
[ 16.702302][ C2] do_idle (kernel/sched/idle.c:325) 
[ 16.702307][ C2] cpu_startup_entry (kernel/sched/idle.c:422 (discriminator 1)) 
[ 16.702310][ C2] start_secondary (arch/x86/kernel/smpboot.c:203 arch/x86/kernel/smpboot.c:283) 
[ 16.702314][ C2] ? __pfx_start_secondary (arch/x86/kernel/smpboot.c:233) 


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