======================================
| [   15.792284][    C3] 1 lock held by swapper/3/0:
| [ 15.792474][ C3] #0: ffffffff8e3749c0 (rcu_callback){....}-{0:0}, at: rcu_do_batch (./include/linux/rcupdate.h:331 kernel/rcu/tree.c:2562) 
| [   15.792813][    C3]
| [   15.792813][    C3] stack backtrace:
[   15.793053][    C3] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[   15.793055][    C3] Call Trace:
[   15.793057][    C3]  <IRQ>
[ 15.793059][ C3] dump_stack_lvl (lib/dump_stack.c:123) 
[ 15.793065][ C3] print_usage_bug.part.0 (kernel/locking/lockdep.c:4046) 
[ 15.793069][ C3] mark_lock_irq (kernel/locking/lockdep.c:4011 kernel/locking/lockdep.c:4057 kernel/locking/lockdep.c:4268) 
[ 15.793074][ C3] ? __pfx_unwind_next_frame (arch/x86/kernel/unwind_orc.c:469) 
[ 15.793080][ C3] ? save_trace (kernel/locking/lockdep.c:594) 
[ 15.793085][ C3] mark_lock (kernel/locking/lockdep.c:4754) 
[ 15.793089][ C3] mark_usage (kernel/locking/lockdep.c:4643) 
[ 15.793093][ C3] __lock_acquire (kernel/locking/lockdep.c:5189) 
[ 15.793098][ C3] lock_acquire.part.0 (kernel/locking/lockdep.c:472 kernel/locking/lockdep.c:5868) 
[ 15.793101][ C3] ? simple_pin_fs (fs/libfs.c:1066) 
[ 15.793104][ C3] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:736) 
[ 15.793109][ C3] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5829) 
[ 15.793111][ C3] ? simple_pin_fs (fs/libfs.c:1066) 
[ 15.793114][ C3] _raw_spin_lock (./include/linux/spinlock_api_smp.h:134 kernel/locking/spinlock.c:154) 
[ 15.793117][ C3] ? simple_pin_fs (fs/libfs.c:1066) 
[ 15.793120][ C3] simple_pin_fs (fs/libfs.c:1066) 
[ 15.793123][ C3] debugfs_remove (fs/debugfs/inode.c:805 fs/debugfs/inode.c:799) 
[ 15.793126][ C3] ref_tracker_dir_exit (lib/ref_tracker.c:423 lib/ref_tracker.c:195) 
[ 15.793131][ C3] ? __pfx_ref_tracker_free (lib/ref_tracker.c:253) 
[ 15.793134][ 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) 
[ 15.793139][ C3] ? rcu_do_batch (./include/linux/rcupdate.h:341 kernel/rcu/tree.c:2570) 
[ 15.793142][ C3] ? __pfx_ref_tracker_dir_exit (lib/ref_tracker.c:189) 
[ 15.793145][ C3] ? irq_exit_rcu (kernel/softirq.c:698) 
[ 15.793147][ C3] ? sysvec_apic_timer_interrupt (arch/x86/kernel/apic/apic.c:1049 arch/x86/kernel/apic/apic.c:1049) 
[ 15.793152][ C3] ? asm_sysvec_apic_timer_interrupt (./arch/x86/include/asm/idtentry.h:702) 
[ 15.793155][ C3] ? pv_native_safe_halt (arch/x86/kernel/paravirt.c:81) 
[ 15.793158][ C3] ? default_idle (./arch/x86/include/asm/paravirt.h:107 arch/x86/kernel/process.c:748) 
[ 15.793160][ C3] ? default_idle_call (./include/linux/cpuidle.h:143 kernel/sched/idle.c:118) 
[ 15.793162][ C3] ? cpuidle_idle_call (kernel/sched/idle.c:186) 
[ 15.793168][ C3] ? do_idle (kernel/sched/idle.c:325) 
[ 15.793171][ C3] ? cpu_startup_entry (kernel/sched/idle.c:422 (discriminator 1)) 
[ 15.793174][ C3] ? start_secondary (arch/x86/kernel/smpboot.c:203 arch/x86/kernel/smpboot.c:283) 
[ 15.793178][ C3] ? common_startup_64 (arch/x86/kernel/head_64.S:419) 
[ 15.793185][ C3] __put_net (net/core/net_namespace.c:732) 
[ 15.793189][ C3] __sk_destruct (./include/net/net_namespace.h:288 ./include/net/net_namespace.h:390 net/core/sock.c:2366) 
[ 15.793193][ C3] ? rcu_do_batch (kernel/rcu/tree.c:2568) 
[ 15.793196][ C3] rcu_do_batch (./include/linux/rcupdate.h:341 kernel/rcu/tree.c:2570) 
[ 15.793200][ C3] ? find_held_lock (kernel/locking/lockdep.c:5348) 
[ 15.793204][ C3] ? __pfx_rcu_do_batch (kernel/rcu/tree.c:2492) 
[ 15.793207][ C3] ? _raw_spin_unlock_irqrestore (./include/linux/spinlock_api_smp.h:151 kernel/locking/spinlock.c:194) 
[ 15.793211][ C3] ? lockdep_hardirqs_on (kernel/locking/lockdep.c:4473) 
[ 15.793215][ C3] ? _raw_spin_unlock_irqrestore (./arch/x86/include/asm/preempt.h:104 ./include/linux/spinlock_api_smp.h:152 kernel/locking/spinlock.c:194) 
[ 15.793219][ C3] rcu_core (kernel/rcu/tree.c:2826) 
[ 15.793223][ C3] handle_softirqs (kernel/softirq.c:579) 
[ 15.793227][ C3] __irq_exit_rcu (kernel/softirq.c:614 kernel/softirq.c:453 kernel/softirq.c:680) 
[ 15.793230][ C3] irq_exit_rcu (kernel/softirq.c:698) 
[ 15.793232][ C3] sysvec_apic_timer_interrupt (arch/x86/kernel/apic/apic.c:1049 arch/x86/kernel/apic/apic.c:1049) 
[   15.793236][    C3]  </IRQ>
[   15.793237][    C3]  <TASK>
[ 15.793238][ C3] asm_sysvec_apic_timer_interrupt (./arch/x86/include/asm/idtentry.h:702) 
[ 15.793241][ C3] RIP: 0010:pv_native_safe_halt (arch/x86/kernel/paravirt.c:81) 
[ 15.793245][ 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
[   15.793248][    C3] RSP: 0018:ffffc90000157de8 EFLAGS: 00000246
[   15.793251][    C3] RAX: 000000000004cec9 RBX: 1ffff9200002afc1 RCX: ffffffff8d35ba19
[   15.793253][    C3] RDX: 0000000000000000 RSI: ffffffff8de87785 RDI: ffffffff8d651260
[   15.793255][    C3] RBP: 0000000000000000 R08: 0000000000000001 R09: ffffed1006c3667a
[   15.793257][    C3] R10: ffff8880361b33d3 R11: 0000000000000000 R12: 0000000000000000
[   15.793258][    C3] R13: ffff888001bf4640 R14: dffffc0000000000 R15: 0000000000000000
[ 15.793262][ C3] ? ct_kernel_exit.constprop.0 (kernel/context_tracking.c:146) 
[ 15.793267][ C3] default_idle (./arch/x86/include/asm/paravirt.h:107 arch/x86/kernel/process.c:748) 
[ 15.793269][ C3] default_idle_call (./include/linux/cpuidle.h:143 kernel/sched/idle.c:118) 
[ 15.793271][ C3] cpuidle_idle_call (kernel/sched/idle.c:186) 
[ 15.793275][ C3] ? __pfx_cpuidle_idle_call (kernel/sched/idle.c:168) 
[ 15.793280][ C3] ? tsc_verify_tsc_adjust (arch/x86/kernel/tsc_sync.c:59) 
[ 15.793285][ C3] do_idle (kernel/sched/idle.c:325) 
[ 15.793289][ C3] cpu_startup_entry (kernel/sched/idle.c:422 (discriminator 1)) 
[ 15.793292][ C3] start_secondary (arch/x86/kernel/smpboot.c:203 arch/x86/kernel/smpboot.c:283) 
[ 15.793296][ C3] ? __pfx_start_secondary (arch/x86/kernel/smpboot.c:233) 
[ 15.793301][ C3] common_startup_64 (arch/x86/kernel/head_64.S:419) 
| [   15.808946][    C3] RCU nest depth: 0, expected: 0
| [   15.809124][    C3] INFO: lockdep is turned off.
| [   15.809298][    C3] Preemption disabled at:
| [ 15.809299][ C3] 0x0 
[   15.809616][    C3] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[   15.809618][    C3] Call Trace:
[   15.809619][    C3]  <IRQ>
[ 15.809621][ C3] dump_stack_lvl (lib/dump_stack.c:123) 
[ 15.809627][ C3] __might_resched (kernel/sched/core.c:8819) 
[ 15.809633][ C3] down_write (./include/linux/kernel.h:73 kernel/locking/rwsem.c:1576) 
[ 15.809636][ C3] ? __pfx_down_write (kernel/locking/rwsem.c:1575) 
[ 15.809639][ C3] ? simple_recursive_removal (./include/linux/dcache.h:345 fs/libfs.c:610) 
[ 15.809643][ C3] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:736) 
[ 15.809648][ 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) 
[ 15.809653][ C3] simple_recursive_removal (./include/linux/dcache.h:409 ./include/linux/dcache.h:424 ./include/linux/dcache.h:434 fs/libfs.c:616) 
[ 15.809655][ C3] ? __pfx_remove_one (fs/debugfs/inode.c:780) 
[ 15.809659][ 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) 
[ 15.809663][ C3] debugfs_remove (fs/debugfs/inode.c:806 fs/debugfs/inode.c:799) 
[ 15.809666][ C3] ref_tracker_dir_exit (lib/ref_tracker.c:423 lib/ref_tracker.c:195) 
[ 15.809670][ C3] ? __pfx_ref_tracker_free (lib/ref_tracker.c:253) 
[ 15.809673][ 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) 
[ 15.809677][ C3] ? rcu_do_batch (./include/linux/rcupdate.h:341 kernel/rcu/tree.c:2570) 
[ 15.809681][ C3] ? __pfx_ref_tracker_dir_exit (lib/ref_tracker.c:189) 
[ 15.809683][ C3] ? irq_exit_rcu (kernel/softirq.c:698) 
[ 15.809687][ C3] ? sysvec_apic_timer_interrupt (arch/x86/kernel/apic/apic.c:1049 arch/x86/kernel/apic/apic.c:1049) 
[ 15.809691][ C3] ? asm_sysvec_apic_timer_interrupt (./arch/x86/include/asm/idtentry.h:702) 
[ 15.809695][ C3] ? pv_native_safe_halt (arch/x86/kernel/paravirt.c:81) 
[ 15.809698][ C3] ? default_idle (./arch/x86/include/asm/paravirt.h:107 arch/x86/kernel/process.c:748) 
[ 15.809700][ C3] ? default_idle_call (./include/linux/cpuidle.h:143 kernel/sched/idle.c:118) 
[ 15.809703][ C3] ? cpuidle_idle_call (kernel/sched/idle.c:186) 
[ 15.809707][ C3] ? do_idle (kernel/sched/idle.c:325) 
[ 15.809710][ C3] ? cpu_startup_entry (kernel/sched/idle.c:422 (discriminator 1)) 
[ 15.809713][ C3] ? start_secondary (arch/x86/kernel/smpboot.c:203 arch/x86/kernel/smpboot.c:283) 
[ 15.809717][ C3] ? common_startup_64 (arch/x86/kernel/head_64.S:419) 
[ 15.809723][ C3] __put_net (net/core/net_namespace.c:732) 
[ 15.809725][ C3] __sk_destruct (./include/net/net_namespace.h:288 ./include/net/net_namespace.h:390 net/core/sock.c:2366) 
[ 15.809729][ C3] ? rcu_do_batch (kernel/rcu/tree.c:2568) 
[ 15.809732][ C3] rcu_do_batch (./include/linux/rcupdate.h:341 kernel/rcu/tree.c:2570) 
[ 15.809736][ C3] ? find_held_lock (kernel/locking/lockdep.c:5348) 
[ 15.809740][ C3] ? __pfx_rcu_do_batch (kernel/rcu/tree.c:2492) 
[ 15.809744][ C3] ? _raw_spin_unlock_irqrestore (./include/linux/spinlock_api_smp.h:151 kernel/locking/spinlock.c:194) 
[ 15.809748][ C3] ? lockdep_hardirqs_on (kernel/locking/lockdep.c:4473) 
[ 15.809751][ C3] ? _raw_spin_unlock_irqrestore (./arch/x86/include/asm/preempt.h:104 ./include/linux/spinlock_api_smp.h:152 kernel/locking/spinlock.c:194) 
[ 15.809756][ C3] rcu_core (kernel/rcu/tree.c:2826) 
[ 15.809760][ C3] handle_softirqs (kernel/softirq.c:579) 
[ 15.809764][ C3] __irq_exit_rcu (kernel/softirq.c:614 kernel/softirq.c:453 kernel/softirq.c:680) 
[ 15.809767][ C3] irq_exit_rcu (kernel/softirq.c:698) 
[ 15.809769][ C3] sysvec_apic_timer_interrupt (arch/x86/kernel/apic/apic.c:1049 arch/x86/kernel/apic/apic.c:1049) 
[   15.809773][    C3]  </IRQ>
[   15.809774][    C3]  <TASK>
[ 15.809775][ C3] asm_sysvec_apic_timer_interrupt (./arch/x86/include/asm/idtentry.h:702) 
[ 15.809778][ C3] RIP: 0010:pv_native_safe_halt (arch/x86/kernel/paravirt.c:81) 
[ 15.809782][ 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
[   15.809785][    C3] RSP: 0018:ffffc90000157de8 EFLAGS: 00000246
[   15.809787][    C3] RAX: 000000000004cec9 RBX: 1ffff9200002afc1 RCX: ffffffff8d35ba19
[   15.809789][    C3] RDX: 0000000000000000 RSI: ffffffff8de87785 RDI: ffffffff8d651260
[   15.809791][    C3] RBP: 0000000000000000 R08: 0000000000000001 R09: ffffed1006c3667a
[   15.809793][    C3] R10: ffff8880361b33d3 R11: 0000000000000000 R12: 0000000000000000
[   15.809795][    C3] R13: ffff888001bf4640 R14: dffffc0000000000 R15: 0000000000000000
[ 15.809799][ C3] ? ct_kernel_exit.constprop.0 (kernel/context_tracking.c:146) 
[ 15.809803][ C3] default_idle (./arch/x86/include/asm/paravirt.h:107 arch/x86/kernel/process.c:748) 
[ 15.809806][ C3] default_idle_call (./include/linux/cpuidle.h:143 kernel/sched/idle.c:118) 
[ 15.809808][ C3] cpuidle_idle_call (kernel/sched/idle.c:186) 
[ 15.809812][ C3] ? __pfx_cpuidle_idle_call (kernel/sched/idle.c:168) 
[ 15.809816][ C3] ? tsc_verify_tsc_adjust (arch/x86/kernel/tsc_sync.c:59) 
[ 15.809821][ C3] do_idle (kernel/sched/idle.c:325) 
[ 15.809825][ C3] cpu_startup_entry (kernel/sched/idle.c:422 (discriminator 1)) 
[ 15.809828][ C3] start_secondary (arch/x86/kernel/smpboot.c:203 arch/x86/kernel/smpboot.c:283) 
[ 15.809832][ C3] ? __pfx_start_secondary (arch/x86/kernel/smpboot.c:233) 
[ 15.809837][ C3] common_startup_64 (arch/x86/kernel/head_64.S:419) 
| [   17.697255][    C1] INFO: lockdep is turned off.
| [   17.697439][    C1] Preemption disabled at:
| [ 17.697441][ C1] 0x0 
| [   17.697781][    C1] Tainted: [W]=WARN
[   17.697782][    C1] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[   17.697785][    C1] Call Trace:
[   17.697787][    C1]  <IRQ>
[ 17.697789][ C1] dump_stack_lvl (lib/dump_stack.c:123) 
[ 17.697800][ C1] __might_resched (kernel/sched/core.c:8819) 
[ 17.697809][ C1] down_write (./include/linux/kernel.h:73 kernel/locking/rwsem.c:1576) 
[ 17.697815][ C1] ? __pfx_down_write (kernel/locking/rwsem.c:1575) 
[ 17.697818][ C1] ? simple_recursive_removal (./include/linux/dcache.h:345 fs/libfs.c:610) 
[ 17.697824][ C1] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:736) 
[ 17.697832][ C1] ? 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) 
[ 17.697838][ C1] simple_recursive_removal (./include/linux/dcache.h:409 ./include/linux/dcache.h:424 ./include/linux/dcache.h:434 fs/libfs.c:616) 
[ 17.697841][ C1] ? __pfx_remove_one (fs/debugfs/inode.c:780) 
[ 17.697846][ C1] ? 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) 
[ 17.697854][ C1] debugfs_remove (fs/debugfs/inode.c:806 fs/debugfs/inode.c:799) 
[ 17.697857][ C1] ref_tracker_dir_exit (lib/ref_tracker.c:423 lib/ref_tracker.c:195) 
[ 17.697863][ C1] ? __pfx_ref_tracker_free (lib/ref_tracker.c:253) 
[ 17.697866][ C1] ? __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) 
[ 17.697873][ C1] ? rcu_do_batch (./include/linux/rcupdate.h:341 kernel/rcu/tree.c:2570) 
[ 17.697878][ C1] ? __pfx_ref_tracker_dir_exit (lib/ref_tracker.c:189) 
[ 17.697881][ C1] ? irq_exit_rcu (kernel/softirq.c:698) 
[ 17.697886][ C1] ? sysvec_apic_timer_interrupt (arch/x86/kernel/apic/apic.c:1049 arch/x86/kernel/apic/apic.c:1049) 
[ 17.697892][ C1] ? asm_sysvec_apic_timer_interrupt (./arch/x86/include/asm/idtentry.h:702) 
[ 17.697896][ C1] ? pv_native_safe_halt (arch/x86/kernel/paravirt.c:81) 
[ 17.697900][ C1] ? default_idle (./arch/x86/include/asm/paravirt.h:107 arch/x86/kernel/process.c:748) 
[ 17.697902][ C1] ? default_idle_call (./include/linux/cpuidle.h:143 kernel/sched/idle.c:118) 
[ 17.697905][ C1] ? cpuidle_idle_call (kernel/sched/idle.c:186) 
[ 17.697910][ C1] ? do_idle (kernel/sched/idle.c:325) 
[ 17.697913][ C1] ? cpu_startup_entry (kernel/sched/idle.c:422 (discriminator 1)) 
[ 17.697916][ C1] ? start_secondary (arch/x86/kernel/smpboot.c:203 arch/x86/kernel/smpboot.c:283) 
[ 17.697923][ C1] ? common_startup_64 (arch/x86/kernel/head_64.S:419) 
[ 17.697928][ C1] ? bpf_sk_storage_free (./include/linux/rcupdate.h:341 ./include/linux/rcupdate.h:871 net/core/bpf_sk_storage.c:61) 
[ 17.697933][ C1] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:736) 
[ 17.697939][ C1] __put_net (net/core/net_namespace.c:732) 
[ 17.697943][ C1] __sk_destruct (./include/net/net_namespace.h:288 ./include/net/net_namespace.h:390 net/core/sock.c:2366) 
[ 17.697947][ C1] ? rcu_do_batch (kernel/rcu/tree.c:2568) 
[ 17.697950][ C1] rcu_do_batch (./include/linux/rcupdate.h:341 kernel/rcu/tree.c:2570) 
[ 17.697955][ C1] ? __pfx_rcu_do_batch (kernel/rcu/tree.c:2492) 
[ 17.697959][ C1] ? trace_irq_enable.constprop.0 (./include/trace/events/preemptirq.h:40) 
[ 17.697965][ C1] ? _raw_spin_unlock_irqrestore (./arch/x86/include/asm/preempt.h:104 ./include/linux/spinlock_api_smp.h:152 kernel/locking/spinlock.c:194) 
[ 17.697972][ C1] rcu_core (kernel/rcu/tree.c:2826) 
[ 17.697976][ C1] handle_softirqs (kernel/softirq.c:579) 
[ 17.697981][ C1] __irq_exit_rcu (kernel/softirq.c:614 kernel/softirq.c:453 kernel/softirq.c:680) 
[ 17.697983][ C1] irq_exit_rcu (kernel/softirq.c:698) 
[ 17.697986][ C1] sysvec_apic_timer_interrupt (arch/x86/kernel/apic/apic.c:1049 arch/x86/kernel/apic/apic.c:1049) 
[   17.697990][    C1]  </IRQ>
[   17.697991][    C1]  <TASK>
[ 17.697992][ C1] asm_sysvec_apic_timer_interrupt (./arch/x86/include/asm/idtentry.h:702) 
[ 17.697995][ C1] RIP: 0010:pv_native_safe_halt (arch/x86/kernel/paravirt.c:81) 
[ 17.698000][ C1] 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
[   17.698003][    C1] RSP: 0018:ffffc90000137de8 EFLAGS: 00000246
[   17.698007][    C1] RAX: 0000000000000001 RBX: 1ffff92000026fc1 RCX: ffffffff8d35ba19
[   17.698009][    C1] RDX: ffffed1006c1667b RSI: ffffffff8d6511e0 RDI: ffffffff8ab8633f
[   17.698011][    C1] RBP: 0000000000000000 R08: 0000000000000000 R09: ffffed1006c1667a
[   17.698013][    C1] R10: ffff8880360b33d3 R11: ffff888002a8cb58 R12: 0000000000000000
[   17.698014][    C1] R13: ffff888001bf0040 R14: dffffc0000000000 R15: 0000000000000000
[ 17.698018][ C1] ? ct_kernel_exit.constprop.0 (kernel/context_tracking.c:146) 
[ 17.698021][ C1] ? cpuidle_idle_call (kernel/sched/idle.c:186) 
[ 17.698026][ C1] default_idle (./arch/x86/include/asm/paravirt.h:107 arch/x86/kernel/process.c:748) 
[ 17.698028][ C1] default_idle_call (./include/linux/cpuidle.h:143 kernel/sched/idle.c:118) 
[ 17.698031][ C1] cpuidle_idle_call (kernel/sched/idle.c:186) 
[ 17.698035][ C1] ? __pfx_cpuidle_idle_call (kernel/sched/idle.c:168) 
[ 17.698039][ C1] ? tsc_verify_tsc_adjust (arch/x86/kernel/tsc_sync.c:59) 
[ 17.698045][ C1] do_idle (kernel/sched/idle.c:325) 
[ 17.698049][ C1] cpu_startup_entry (kernel/sched/idle.c:422 (discriminator 1)) 
[ 17.698053][ C1] start_secondary (arch/x86/kernel/smpboot.c:203 arch/x86/kernel/smpboot.c:283) 
[ 17.698056][ C1] ? __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