======================================
| [   16.068018][    C2] 1 lock held by swapper/2/0:
| [ 16.068216][ C2] #0: ffffffffb89749c0 (rcu_callback){....}-{0:0}, at: rcu_do_batch (./include/linux/rcupdate.h:331 kernel/rcu/tree.c:2562) 
| [   16.068568][    C2]
| [   16.068568][    C2] stack backtrace:
[   16.068815][    C2] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[   16.068817][    C2] Call Trace:
[   16.068819][    C2]  <IRQ>
[ 16.068822][ C2] dump_stack_lvl (lib/dump_stack.c:123) 
[ 16.068827][ C2] print_usage_bug.part.0 (kernel/locking/lockdep.c:4046) 
[ 16.068833][ C2] mark_lock_irq (kernel/locking/lockdep.c:4011 kernel/locking/lockdep.c:4057 kernel/locking/lockdep.c:4268) 
[ 16.068838][ C2] ? __pfx_unwind_next_frame (arch/x86/kernel/unwind_orc.c:469) 
[ 16.068844][ C2] ? save_trace (kernel/locking/lockdep.c:594) 
[ 16.068848][ C2] mark_lock (kernel/locking/lockdep.c:4754) 
[ 16.068853][ C2] mark_usage (kernel/locking/lockdep.c:4643) 
[ 16.068856][ C2] __lock_acquire (kernel/locking/lockdep.c:5189) 
[ 16.068862][ C2] lock_acquire.part.0 (kernel/locking/lockdep.c:472 kernel/locking/lockdep.c:5868) 
[ 16.068865][ C2] ? simple_pin_fs (fs/libfs.c:1066) 
[ 16.068868][ C2] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:736) 
[ 16.068873][ C2] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5829) 
[ 16.068875][ C2] ? simple_pin_fs (fs/libfs.c:1066) 
[ 16.068878][ C2] _raw_spin_lock (./include/linux/spinlock_api_smp.h:134 kernel/locking/spinlock.c:154) 
[ 16.068882][ C2] ? simple_pin_fs (fs/libfs.c:1066) 
[ 16.068884][ C2] simple_pin_fs (fs/libfs.c:1066) 
[ 16.068887][ C2] debugfs_remove (fs/debugfs/inode.c:805 fs/debugfs/inode.c:799) 
[ 16.068891][ C2] ref_tracker_dir_exit (lib/ref_tracker.c:423 lib/ref_tracker.c:195) 
[ 16.068895][ C2] ? __pfx_ref_tracker_free (lib/ref_tracker.c:253) 
[ 16.068899][ 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) 
[ 16.068904][ C2] ? rcu_do_batch (./include/linux/rcupdate.h:341 kernel/rcu/tree.c:2570) 
[ 16.068907][ C2] ? __pfx_ref_tracker_dir_exit (lib/ref_tracker.c:189) 
[ 16.068910][ C2] ? irq_exit_rcu (kernel/softirq.c:698) 
[ 16.068912][ C2] ? sysvec_apic_timer_interrupt (arch/x86/kernel/apic/apic.c:1049 arch/x86/kernel/apic/apic.c:1049) 
[ 16.068916][ C2] ? asm_sysvec_apic_timer_interrupt (./arch/x86/include/asm/idtentry.h:702) 
[ 16.068920][ C2] ? pv_native_safe_halt (arch/x86/kernel/paravirt.c:81) 
[ 16.068923][ C2] ? default_idle (./arch/x86/include/asm/paravirt.h:107 arch/x86/kernel/process.c:748) 
[ 16.068925][ C2] ? default_idle_call (./include/linux/cpuidle.h:143 kernel/sched/idle.c:118) 
[ 16.068928][ C2] ? cpuidle_idle_call (kernel/sched/idle.c:186) 
[ 16.068932][ C2] ? do_idle (kernel/sched/idle.c:325) 
[ 16.068935][ C2] ? cpu_startup_entry (kernel/sched/idle.c:422 (discriminator 1)) 
[ 16.068938][ C2] ? start_secondary (arch/x86/kernel/smpboot.c:203 arch/x86/kernel/smpboot.c:283) 
[ 16.068942][ C2] ? common_startup_64 (arch/x86/kernel/head_64.S:419) 
[ 16.068948][ C2] __put_net (net/core/net_namespace.c:732) 
[ 16.068952][ C2] __sk_destruct (./include/net/net_namespace.h:288 ./include/net/net_namespace.h:390 net/core/sock.c:2366) 
[ 16.068956][ C2] ? rcu_do_batch (kernel/rcu/tree.c:2568) 
[ 16.068959][ C2] rcu_do_batch (./include/linux/rcupdate.h:341 kernel/rcu/tree.c:2570) 
[ 16.068963][ C2] ? find_held_lock (kernel/locking/lockdep.c:5348) 
[ 16.068967][ C2] ? __pfx_rcu_do_batch (kernel/rcu/tree.c:2492) 
[ 16.068971][ C2] ? _raw_spin_unlock_irqrestore (./include/linux/spinlock_api_smp.h:151 kernel/locking/spinlock.c:194) 
[ 16.068974][ C2] ? lockdep_hardirqs_on (kernel/locking/lockdep.c:4473) 
[ 16.068978][ C2] ? _raw_spin_unlock_irqrestore (./arch/x86/include/asm/preempt.h:104 ./include/linux/spinlock_api_smp.h:152 kernel/locking/spinlock.c:194) 
[ 16.068982][ C2] rcu_core (kernel/rcu/tree.c:2826) 
[ 16.068986][ C2] handle_softirqs (kernel/softirq.c:579) 
[ 16.068991][ C2] __irq_exit_rcu (kernel/softirq.c:614 kernel/softirq.c:453 kernel/softirq.c:680) 
[ 16.068994][ C2] irq_exit_rcu (kernel/softirq.c:698) 
[ 16.068996][ C2] sysvec_apic_timer_interrupt (arch/x86/kernel/apic/apic.c:1049 arch/x86/kernel/apic/apic.c:1049) 
[   16.069000][    C2]  </IRQ>
[   16.069001][    C2]  <TASK>
[ 16.069002][ C2] asm_sysvec_apic_timer_interrupt (./arch/x86/include/asm/idtentry.h:702) 
[ 16.069005][ C2] RIP: 0010:pv_native_safe_halt (arch/x86/kernel/paravirt.c:81) 
[ 16.069009][ 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
[   16.069012][    C2] RSP: 0018:ffffc90000147de8 EFLAGS: 00000242
[   16.069015][    C2] RAX: 0000000000044f7f RBX: 1ffff92000028fc1 RCX: ffffffffb795ba19
[   16.069017][    C2] RDX: 0000000000000000 RSI: ffffffffb8487785 RDI: ffffffffb7c51260
[   16.069019][    C2] RBP: 0000000000000000 R08: 0000000000000001 R09: ffffed1006c2667a
[   16.069021][    C2] R10: ffff8880361333d3 R11: 0000000000000000 R12: 0000000000000000
[   16.069023][    C2] R13: ffff888001bf2340 R14: dffffc0000000000 R15: 0000000000000000
[ 16.069027][ C2] ? ct_kernel_exit.constprop.0 (kernel/context_tracking.c:146) 
[ 16.069031][ C2] default_idle (./arch/x86/include/asm/paravirt.h:107 arch/x86/kernel/process.c:748) 
[ 16.069034][ C2] default_idle_call (./include/linux/cpuidle.h:143 kernel/sched/idle.c:118) 
[ 16.069036][ C2] cpuidle_idle_call (kernel/sched/idle.c:186) 
[ 16.069040][ C2] ? __pfx_cpuidle_idle_call (kernel/sched/idle.c:168) 
[ 16.069044][ C2] ? tsc_verify_tsc_adjust (arch/x86/kernel/tsc_sync.c:59) 
[ 16.069049][ C2] do_idle (kernel/sched/idle.c:325) 
[ 16.069053][ C2] cpu_startup_entry (kernel/sched/idle.c:422 (discriminator 1)) 
[ 16.069057][ C2] start_secondary (arch/x86/kernel/smpboot.c:203 arch/x86/kernel/smpboot.c:283) 
[ 16.069061][ C2] ? __pfx_start_secondary (arch/x86/kernel/smpboot.c:233) 
[ 16.069066][ C2] common_startup_64 (arch/x86/kernel/head_64.S:419) 
| [   16.085224][    C2] RCU nest depth: 0, expected: 0
| [   16.085417][    C2] INFO: lockdep is turned off.
| [   16.085609][    C2] Preemption disabled at:
| [ 16.085610][ C2] 0x0 
[   16.085966][    C2] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[   16.085968][    C2] Call Trace:
[   16.085970][    C2]  <IRQ>
[ 16.085972][ C2] dump_stack_lvl (lib/dump_stack.c:123) 
[ 16.085978][ C2] __might_resched (kernel/sched/core.c:8819) 
[ 16.085984][ C2] down_write (./include/linux/kernel.h:73 kernel/locking/rwsem.c:1576) 
[ 16.085988][ C2] ? __pfx_down_write (kernel/locking/rwsem.c:1575) 
[ 16.085991][ C2] ? simple_recursive_removal (./include/linux/dcache.h:345 fs/libfs.c:610) 
[ 16.085995][ C2] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:736) 
[ 16.086001][ 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) 
[ 16.086005][ C2] simple_recursive_removal (./include/linux/dcache.h:409 ./include/linux/dcache.h:424 ./include/linux/dcache.h:434 fs/libfs.c:616) 
[ 16.086008][ C2] ? __pfx_remove_one (fs/debugfs/inode.c:780) 
[ 16.086012][ 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) 
[ 16.086016][ C2] debugfs_remove (fs/debugfs/inode.c:806 fs/debugfs/inode.c:799) 
[ 16.086019][ C2] ref_tracker_dir_exit (lib/ref_tracker.c:423 lib/ref_tracker.c:195) 
[ 16.086023][ C2] ? __pfx_ref_tracker_free (lib/ref_tracker.c:253) 
[ 16.086027][ 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) 
[ 16.086030][ C2] ? rcu_do_batch (./include/linux/rcupdate.h:341 kernel/rcu/tree.c:2570) 
[ 16.086034][ C2] ? __pfx_ref_tracker_dir_exit (lib/ref_tracker.c:189) 
[ 16.086037][ C2] ? irq_exit_rcu (kernel/softirq.c:698) 
[ 16.086041][ C2] ? sysvec_apic_timer_interrupt (arch/x86/kernel/apic/apic.c:1049 arch/x86/kernel/apic/apic.c:1049) 
[ 16.086044][ C2] ? asm_sysvec_apic_timer_interrupt (./arch/x86/include/asm/idtentry.h:702) 
[ 16.086048][ C2] ? pv_native_safe_halt (arch/x86/kernel/paravirt.c:81) 
[ 16.086051][ C2] ? default_idle (./arch/x86/include/asm/paravirt.h:107 arch/x86/kernel/process.c:748) 
[ 16.086054][ C2] ? default_idle_call (./include/linux/cpuidle.h:143 kernel/sched/idle.c:118) 
[ 16.086056][ C2] ? cpuidle_idle_call (kernel/sched/idle.c:186) 
[ 16.086060][ C2] ? do_idle (kernel/sched/idle.c:325) 
[ 16.086063][ C2] ? cpu_startup_entry (kernel/sched/idle.c:422 (discriminator 1)) 
[ 16.086066][ C2] ? start_secondary (arch/x86/kernel/smpboot.c:203 arch/x86/kernel/smpboot.c:283) 
[ 16.086070][ C2] ? common_startup_64 (arch/x86/kernel/head_64.S:419) 
[ 16.086076][ C2] __put_net (net/core/net_namespace.c:732) 
[ 16.086079][ C2] __sk_destruct (./include/net/net_namespace.h:288 ./include/net/net_namespace.h:390 net/core/sock.c:2366) 
[ 16.086083][ C2] ? rcu_do_batch (kernel/rcu/tree.c:2568) 
[ 16.086086][ C2] rcu_do_batch (./include/linux/rcupdate.h:341 kernel/rcu/tree.c:2570) 
[ 16.086090][ C2] ? find_held_lock (kernel/locking/lockdep.c:5348) 
[ 16.086094][ C2] ? __pfx_rcu_do_batch (kernel/rcu/tree.c:2492) 
[ 16.086098][ C2] ? _raw_spin_unlock_irqrestore (./include/linux/spinlock_api_smp.h:151 kernel/locking/spinlock.c:194) 
[ 16.086102][ C2] ? lockdep_hardirqs_on (kernel/locking/lockdep.c:4473) 
[ 16.086106][ C2] ? _raw_spin_unlock_irqrestore (./arch/x86/include/asm/preempt.h:104 ./include/linux/spinlock_api_smp.h:152 kernel/locking/spinlock.c:194) 
[ 16.086110][ C2] rcu_core (kernel/rcu/tree.c:2826) 
[ 16.086114][ C2] handle_softirqs (kernel/softirq.c:579) 
[ 16.086119][ C2] __irq_exit_rcu (kernel/softirq.c:614 kernel/softirq.c:453 kernel/softirq.c:680) 
[ 16.086122][ C2] irq_exit_rcu (kernel/softirq.c:698) 
[ 16.086124][ C2] sysvec_apic_timer_interrupt (arch/x86/kernel/apic/apic.c:1049 arch/x86/kernel/apic/apic.c:1049) 
[   16.086128][    C2]  </IRQ>
[   16.086129][    C2]  <TASK>
[ 16.086130][ C2] asm_sysvec_apic_timer_interrupt (./arch/x86/include/asm/idtentry.h:702) 
[ 16.086133][ C2] RIP: 0010:pv_native_safe_halt (arch/x86/kernel/paravirt.c:81) 
[ 16.086137][ 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
[   16.086139][    C2] RSP: 0018:ffffc90000147de8 EFLAGS: 00000242
[   16.086142][    C2] RAX: 0000000000044f7f RBX: 1ffff92000028fc1 RCX: ffffffffb795ba19
[   16.086145][    C2] RDX: 0000000000000000 RSI: ffffffffb8487785 RDI: ffffffffb7c51260
[   16.086146][    C2] RBP: 0000000000000000 R08: 0000000000000001 R09: ffffed1006c2667a
[   16.086148][    C2] R10: ffff8880361333d3 R11: 0000000000000000 R12: 0000000000000000
[   16.086150][    C2] R13: ffff888001bf2340 R14: dffffc0000000000 R15: 0000000000000000
[ 16.086154][ C2] ? ct_kernel_exit.constprop.0 (kernel/context_tracking.c:146) 
[ 16.086158][ C2] default_idle (./arch/x86/include/asm/paravirt.h:107 arch/x86/kernel/process.c:748) 
[ 16.086161][ C2] default_idle_call (./include/linux/cpuidle.h:143 kernel/sched/idle.c:118) 
[ 16.086163][ C2] cpuidle_idle_call (kernel/sched/idle.c:186) 
[ 16.086167][ C2] ? __pfx_cpuidle_idle_call (kernel/sched/idle.c:168) 
[ 16.086171][ C2] ? tsc_verify_tsc_adjust (arch/x86/kernel/tsc_sync.c:59) 
[ 16.086176][ C2] do_idle (kernel/sched/idle.c:325) 
[ 16.086180][ C2] cpu_startup_entry (kernel/sched/idle.c:422 (discriminator 1)) 
[ 16.086184][ C2] start_secondary (arch/x86/kernel/smpboot.c:203 arch/x86/kernel/smpboot.c:283) 
[ 16.086187][ C2] ? __pfx_start_secondary (arch/x86/kernel/smpboot.c:233) 
[ 16.086193][ C2] common_startup_64 (arch/x86/kernel/head_64.S:419) 
| [   17.854965][    C0] INFO: lockdep is turned off.
| [   17.855172][    C0] Preemption disabled at:
| [ 17.855174][ C0] schedule_preempt_disabled (kernel/sched/core.c:6919) 
| [   17.855653][    C0] Tainted: [W]=WARN
[   17.855655][    C0] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[   17.855657][    C0] Call Trace:
[   17.855659][    C0]  <IRQ>
[ 17.855661][ C0] dump_stack_lvl (lib/dump_stack.c:123) 
[ 17.855669][ C0] __might_resched (kernel/sched/core.c:8819) 
[ 17.855677][ C0] down_write (./include/linux/kernel.h:73 kernel/locking/rwsem.c:1576) 
[ 17.855682][ C0] ? __pfx_down_write (kernel/locking/rwsem.c:1575) 
[ 17.855685][ C0] ? simple_recursive_removal (./include/linux/dcache.h:345 fs/libfs.c:610) 
[ 17.855691][ C0] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:736) 
[ 17.855699][ 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) 
[ 17.855705][ C0] simple_recursive_removal (./include/linux/dcache.h:409 ./include/linux/dcache.h:424 ./include/linux/dcache.h:434 fs/libfs.c:616) 
[ 17.855708][ C0] ? __pfx_remove_one (fs/debugfs/inode.c:780) 
[ 17.855713][ 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) 
[ 17.855718][ C0] debugfs_remove (fs/debugfs/inode.c:806 fs/debugfs/inode.c:799) 
[ 17.855721][ C0] ref_tracker_dir_exit (lib/ref_tracker.c:423 lib/ref_tracker.c:195) 
[ 17.855727][ C0] ? __pfx_ref_tracker_free (lib/ref_tracker.c:253) 
[ 17.855730][ 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:2366) 
[ 17.855737][ C0] ? rcu_do_batch (./include/linux/rcupdate.h:341 kernel/rcu/tree.c:2570) 
[ 17.855742][ C0] ? __pfx_ref_tracker_dir_exit (lib/ref_tracker.c:189) 
[ 17.855745][ C0] ? irq_exit_rcu (kernel/softirq.c:698) 
[ 17.855751][ C0] ? sysvec_apic_timer_interrupt (arch/x86/kernel/apic/apic.c:1049 arch/x86/kernel/apic/apic.c:1049) 
[ 17.855756][ C0] ? asm_sysvec_apic_timer_interrupt (./arch/x86/include/asm/idtentry.h:702) 
[ 17.855761][ C0] ? pv_native_safe_halt (arch/x86/kernel/paravirt.c:81) 
[ 17.855764][ C0] ? default_idle (./arch/x86/include/asm/paravirt.h:107 arch/x86/kernel/process.c:748) 
[ 17.855769][ C0] ? default_idle_call (./include/linux/cpuidle.h:143 kernel/sched/idle.c:118) 
[ 17.855772][ C0] ? cpuidle_idle_call (kernel/sched/idle.c:186) 
[ 17.855778][ C0] ? do_idle (kernel/sched/idle.c:325) 
[ 17.855781][ C0] ? cpu_startup_entry (kernel/sched/idle.c:422 (discriminator 1)) 
[ 17.855784][ C0] ? rest_init (./include/linux/rcupdate.h:842 init/main.c:714) 
[ 17.855787][ C0] ? start_kernel (init/main.c:1049 (discriminator 1)) 
[ 17.855794][ C0] ? bpf_sk_storage_free (./include/linux/rcupdate.h:341 ./include/linux/rcupdate.h:871 net/core/bpf_sk_storage.c:61) 
[ 17.855799][ C0] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:736) 
[ 17.855804][ C0] __put_net (net/core/net_namespace.c:732) 
[ 17.855808][ C0] __sk_destruct (./include/net/net_namespace.h:288 ./include/net/net_namespace.h:390 net/core/sock.c:2366) 
[ 17.855812][ C0] ? rcu_do_batch (kernel/rcu/tree.c:2568) 
[ 17.855816][ C0] rcu_do_batch (./include/linux/rcupdate.h:341 kernel/rcu/tree.c:2570) 
[ 17.855821][ C0] ? __pfx_rcu_do_batch (kernel/rcu/tree.c:2492) 
[ 17.855825][ C0] ? trace_irq_enable.constprop.0 (./include/trace/events/preemptirq.h:40) 
[ 17.855831][ C0] ? _raw_spin_unlock_irqrestore (./arch/x86/include/asm/preempt.h:104 ./include/linux/spinlock_api_smp.h:152 kernel/locking/spinlock.c:194) 
[ 17.855837][ C0] rcu_core (kernel/rcu/tree.c:2826) 
[ 17.855842][ C0] handle_softirqs (kernel/softirq.c:579) 
[ 17.855847][ C0] __irq_exit_rcu (kernel/softirq.c:614 kernel/softirq.c:453 kernel/softirq.c:680) 
[ 17.855849][ C0] irq_exit_rcu (kernel/softirq.c:698) 
[ 17.855852][ C0] sysvec_apic_timer_interrupt (arch/x86/kernel/apic/apic.c:1049 arch/x86/kernel/apic/apic.c:1049) 
[   17.855855][    C0]  </IRQ>
[   17.855856][    C0]  <TASK>
[ 17.855858][ C0] asm_sysvec_apic_timer_interrupt (./arch/x86/include/asm/idtentry.h:702) 
[ 17.855861][ C0] RIP: 0010:pv_native_safe_halt (arch/x86/kernel/paravirt.c:81) 
[ 17.855865][ C0] 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
[   17.855868][    C0] RSP: 0018:ffffffffb8607df8 EFLAGS: 00000246
[   17.855872][    C0] RAX: 0000000000000000 RBX: 1ffffffff70c0fc3 RCX: ffffffffb795ba19
[   17.855874][    C0] RDX: ffffed1006c0667b RSI: ffffffffb7c511e0 RDI: ffffffffb518633f
[   17.855876][    C0] RBP: 0000000000000000 R08: 0000000000000000 R09: ffffed1006c0667a
[   17.855878][    C0] R10: ffff8880360333d3 R11: ffffffffb86079e8 R12: 0000000000000000
[   17.855880][    C0] R13: ffffffffb861f240 R14: dffffc0000000000 R15: 0000000000014770
[ 17.855884][ C0] ? ct_kernel_exit.constprop.0 (kernel/context_tracking.c:146) 
[ 17.855887][ C0] ? cpuidle_idle_call (kernel/sched/idle.c:186) 
[ 17.855891][ C0] default_idle (./arch/x86/include/asm/paravirt.h:107 arch/x86/kernel/process.c:748) 
[ 17.855894][ C0] default_idle_call (./include/linux/cpuidle.h:143 kernel/sched/idle.c:118) 
[ 17.855896][ C0] cpuidle_idle_call (kernel/sched/idle.c:186) 
[ 17.855900][ C0] ? __pfx_cpuidle_idle_call (kernel/sched/idle.c:168) 
[ 17.855904][ C0] ? tsc_verify_tsc_adjust (arch/x86/kernel/tsc_sync.c:59) 
[ 17.855913][ C0] do_idle (kernel/sched/idle.c:325) 
[ 17.855918][ C0] cpu_startup_entry (kernel/sched/idle.c:422 (discriminator 1)) 
[ 17.855921][ C0] rest_init (./include/linux/rcupdate.h:842 init/main.c:714) 
[ 17.855925][ C0] start_kernel (init/main.c:1049 (discriminator 1)) 
[ 17.855929][ C0] x86_64_start_reservations (arch/x86/kernel/head64.c:501) 
[ 17.855934][ 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