======================================
| [   15.599040][    C2] 1 lock held by swapper/2/0:
| [ 15.599247][ C2] #0: ffffffff9ff749c0 (rcu_callback){....}-{0:0}, at: rcu_do_batch (./include/linux/rcupdate.h:331 kernel/rcu/tree.c:2562) 
| [   15.599624][    C2]
| [   15.599624][    C2] stack backtrace:
[   15.599887][    C2] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[   15.599890][    C2] Call Trace:
[   15.599892][    C2]  <IRQ>
[ 15.599894][ C2] dump_stack_lvl (lib/dump_stack.c:123) 
[ 15.599901][ C2] print_usage_bug.part.0 (kernel/locking/lockdep.c:4046) 
[ 15.599906][ C2] mark_lock_irq (kernel/locking/lockdep.c:4011 kernel/locking/lockdep.c:4057 kernel/locking/lockdep.c:4268) 
[ 15.599912][ C2] ? __pfx_unwind_next_frame (arch/x86/kernel/unwind_orc.c:469) 
[ 15.599918][ C2] ? save_trace (kernel/locking/lockdep.c:594) 
[ 15.599923][ C2] mark_lock (kernel/locking/lockdep.c:4754) 
[ 15.599927][ C2] mark_usage (kernel/locking/lockdep.c:4643) 
[ 15.599931][ C2] __lock_acquire (kernel/locking/lockdep.c:5189) 
[ 15.599937][ C2] lock_acquire.part.0 (kernel/locking/lockdep.c:472 kernel/locking/lockdep.c:5868) 
[ 15.599939][ C2] ? simple_pin_fs (fs/libfs.c:1066) 
[ 15.599943][ C2] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:736) 
[ 15.599949][ C2] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5829) 
[ 15.599951][ C2] ? simple_pin_fs (fs/libfs.c:1066) 
[ 15.599955][ C2] _raw_spin_lock (./include/linux/spinlock_api_smp.h:134 kernel/locking/spinlock.c:154) 
[ 15.599958][ C2] ? simple_pin_fs (fs/libfs.c:1066) 
[ 15.599961][ C2] simple_pin_fs (fs/libfs.c:1066) 
[ 15.599964][ C2] debugfs_remove (fs/debugfs/inode.c:805 fs/debugfs/inode.c:799) 
[ 15.599968][ C2] ref_tracker_dir_exit (lib/ref_tracker.c:423 lib/ref_tracker.c:195) 
[ 15.599974][ C2] ? __pfx_ref_tracker_free (lib/ref_tracker.c:253) 
[ 15.599977][ 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) 
[ 15.599984][ C2] ? rcu_do_batch (./include/linux/rcupdate.h:341 kernel/rcu/tree.c:2570) 
[ 15.599988][ C2] ? __pfx_ref_tracker_dir_exit (lib/ref_tracker.c:189) 
[ 15.599991][ C2] ? irq_exit_rcu (kernel/softirq.c:698) 
[ 15.599994][ C2] ? sysvec_apic_timer_interrupt (arch/x86/kernel/apic/apic.c:1049 arch/x86/kernel/apic/apic.c:1049) 
[ 15.599999][ C2] ? asm_sysvec_apic_timer_interrupt (./arch/x86/include/asm/idtentry.h:702) 
[ 15.600003][ C2] ? pv_native_safe_halt (arch/x86/kernel/paravirt.c:81) 
[ 15.600007][ C2] ? default_idle (./arch/x86/include/asm/paravirt.h:107 arch/x86/kernel/process.c:748) 
[ 15.600009][ C2] ? default_idle_call (./include/linux/cpuidle.h:143 kernel/sched/idle.c:118) 
[ 15.600012][ C2] ? cpuidle_idle_call (kernel/sched/idle.c:186) 
[ 15.600016][ C2] ? do_idle (kernel/sched/idle.c:325) 
[ 15.600019][ C2] ? cpu_startup_entry (kernel/sched/idle.c:422 (discriminator 1)) 
[ 15.600023][ C2] ? start_secondary (arch/x86/kernel/smpboot.c:203 arch/x86/kernel/smpboot.c:283) 
[ 15.600027][ C2] ? common_startup_64 (arch/x86/kernel/head_64.S:419) 
[ 15.600034][ C2] __put_net (net/core/net_namespace.c:732) 
[ 15.600039][ C2] __sk_destruct (./include/net/net_namespace.h:288 ./include/net/net_namespace.h:390 net/core/sock.c:2366) 
[ 15.600043][ C2] ? rcu_do_batch (kernel/rcu/tree.c:2568) 
[ 15.600046][ C2] rcu_do_batch (./include/linux/rcupdate.h:341 kernel/rcu/tree.c:2570) 
[ 15.600050][ C2] ? find_held_lock (kernel/locking/lockdep.c:5348) 
[ 15.600054][ C2] ? __pfx_rcu_do_batch (kernel/rcu/tree.c:2492) 
[ 15.600058][ C2] ? _raw_spin_unlock_irqrestore (./include/linux/spinlock_api_smp.h:151 kernel/locking/spinlock.c:194) 
[ 15.600061][ C2] ? lockdep_hardirqs_on (kernel/locking/lockdep.c:4473) 
[ 15.600065][ C2] ? _raw_spin_unlock_irqrestore (./arch/x86/include/asm/preempt.h:104 ./include/linux/spinlock_api_smp.h:152 kernel/locking/spinlock.c:194) 
[ 15.600070][ C2] rcu_core (kernel/rcu/tree.c:2826) 
[ 15.600074][ C2] handle_softirqs (kernel/softirq.c:579) 
[ 15.600079][ C2] __irq_exit_rcu (kernel/softirq.c:614 kernel/softirq.c:453 kernel/softirq.c:680) 
[ 15.600082][ C2] irq_exit_rcu (kernel/softirq.c:698) 
[ 15.600085][ C2] sysvec_apic_timer_interrupt (arch/x86/kernel/apic/apic.c:1049 arch/x86/kernel/apic/apic.c:1049) 
[   15.600088][    C2]  </IRQ>
[   15.600089][    C2]  <TASK>
[ 15.600091][ C2] asm_sysvec_apic_timer_interrupt (./arch/x86/include/asm/idtentry.h:702) 
[ 15.600094][ C2] RIP: 0010:pv_native_safe_halt (arch/x86/kernel/paravirt.c:81) 
[ 15.600099][ 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
[   15.600102][    C2] RSP: 0018:ffffc90000147de8 EFLAGS: 00000242
[   15.600105][    C2] RAX: 000000000003c3b9 RBX: 1ffff92000028fc1 RCX: ffffffff9ef5ba19
[   15.600108][    C2] RDX: 0000000000000000 RSI: ffffffff9fa87785 RDI: ffffffff9f251260
[   15.600109][    C2] RBP: 0000000000000000 R08: 0000000000000001 R09: ffffed1006c2667a
[   15.600111][    C2] R10: ffff8880361333d3 R11: 0000000000000000 R12: 0000000000000000
[   15.600113][    C2] R13: ffff888001bf2340 R14: dffffc0000000000 R15: 0000000000000000
[ 15.600117][ C2] ? ct_kernel_exit.constprop.0 (kernel/context_tracking.c:146) 
[ 15.600121][ C2] default_idle (./arch/x86/include/asm/paravirt.h:107 arch/x86/kernel/process.c:748) 
[ 15.600123][ C2] default_idle_call (./include/linux/cpuidle.h:143 kernel/sched/idle.c:118) 
[ 15.600126][ C2] cpuidle_idle_call (kernel/sched/idle.c:186) 
[ 15.600130][ C2] ? __pfx_cpuidle_idle_call (kernel/sched/idle.c:168) 
[ 15.600134][ C2] ? tsc_verify_tsc_adjust (arch/x86/kernel/tsc_sync.c:59) 
[ 15.600139][ C2] do_idle (kernel/sched/idle.c:325) 
[ 15.600143][ C2] cpu_startup_entry (kernel/sched/idle.c:422 (discriminator 1)) 
[ 15.600146][ C2] start_secondary (arch/x86/kernel/smpboot.c:203 arch/x86/kernel/smpboot.c:283) 
[ 15.600150][ C2] ? __pfx_start_secondary (arch/x86/kernel/smpboot.c:233) 
[ 15.600155][ C2] common_startup_64 (arch/x86/kernel/head_64.S:419) 
| [   15.617735][    C2] RCU nest depth: 0, expected: 0
| [   15.617948][    C2] INFO: lockdep is turned off.
| [   15.618164][    C2] Preemption disabled at:
| [ 15.618166][ C2] 0x0 
[   15.618532][    C2] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[   15.618534][    C2] Call Trace:
[   15.618536][    C2]  <IRQ>
[ 15.618538][ C2] dump_stack_lvl (lib/dump_stack.c:123) 
[ 15.618546][ C2] __might_resched (kernel/sched/core.c:8819) 
[ 15.618554][ C2] down_write (./include/linux/kernel.h:73 kernel/locking/rwsem.c:1576) 
[ 15.618559][ C2] ? __pfx_down_write (kernel/locking/rwsem.c:1575) 
[ 15.618562][ C2] ? simple_recursive_removal (./include/linux/dcache.h:345 fs/libfs.c:610) 
[ 15.618568][ C2] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:736) 
[ 15.618574][ 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) 
[ 15.618580][ C2] simple_recursive_removal (./include/linux/dcache.h:409 ./include/linux/dcache.h:424 ./include/linux/dcache.h:434 fs/libfs.c:616) 
[ 15.618583][ C2] ? __pfx_remove_one (fs/debugfs/inode.c:780) 
[ 15.618588][ 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) 
[ 15.618592][ C2] debugfs_remove (fs/debugfs/inode.c:806 fs/debugfs/inode.c:799) 
[ 15.618596][ C2] ref_tracker_dir_exit (lib/ref_tracker.c:423 lib/ref_tracker.c:195) 
[ 15.618601][ C2] ? __pfx_ref_tracker_free (lib/ref_tracker.c:253) 
[ 15.618604][ 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) 
[ 15.618611][ C2] ? rcu_do_batch (./include/linux/rcupdate.h:341 kernel/rcu/tree.c:2570) 
[ 15.618615][ C2] ? __pfx_ref_tracker_dir_exit (lib/ref_tracker.c:189) 
[ 15.618619][ C2] ? irq_exit_rcu (kernel/softirq.c:698) 
[ 15.618623][ C2] ? sysvec_apic_timer_interrupt (arch/x86/kernel/apic/apic.c:1049 arch/x86/kernel/apic/apic.c:1049) 
[ 15.618628][ C2] ? asm_sysvec_apic_timer_interrupt (./arch/x86/include/asm/idtentry.h:702) 
[ 15.618632][ C2] ? pv_native_safe_halt (arch/x86/kernel/paravirt.c:81) 
[ 15.618635][ C2] ? default_idle (./arch/x86/include/asm/paravirt.h:107 arch/x86/kernel/process.c:748) 
[ 15.618638][ C2] ? default_idle_call (./include/linux/cpuidle.h:143 kernel/sched/idle.c:118) 
[ 15.618641][ C2] ? cpuidle_idle_call (kernel/sched/idle.c:186) 
[ 15.618646][ C2] ? do_idle (kernel/sched/idle.c:325) 
[ 15.618649][ C2] ? cpu_startup_entry (kernel/sched/idle.c:422 (discriminator 1)) 
[ 15.618652][ C2] ? start_secondary (arch/x86/kernel/smpboot.c:203 arch/x86/kernel/smpboot.c:283) 
[ 15.618657][ C2] ? common_startup_64 (arch/x86/kernel/head_64.S:419) 
[ 15.618664][ C2] __put_net (net/core/net_namespace.c:732) 
[ 15.618668][ C2] __sk_destruct (./include/net/net_namespace.h:288 ./include/net/net_namespace.h:390 net/core/sock.c:2366) 
[ 15.618672][ C2] ? rcu_do_batch (kernel/rcu/tree.c:2568) 
[ 15.618675][ C2] rcu_do_batch (./include/linux/rcupdate.h:341 kernel/rcu/tree.c:2570) 
[ 15.618679][ C2] ? find_held_lock (kernel/locking/lockdep.c:5348) 
[ 15.618685][ C2] ? __pfx_rcu_do_batch (kernel/rcu/tree.c:2492) 
[ 15.618688][ C2] ? _raw_spin_unlock_irqrestore (./include/linux/spinlock_api_smp.h:151 kernel/locking/spinlock.c:194) 
[ 15.618693][ C2] ? lockdep_hardirqs_on (kernel/locking/lockdep.c:4473) 
[ 15.618697][ C2] ? _raw_spin_unlock_irqrestore (./arch/x86/include/asm/preempt.h:104 ./include/linux/spinlock_api_smp.h:152 kernel/locking/spinlock.c:194) 
[ 15.618701][ C2] rcu_core (kernel/rcu/tree.c:2826) 
[ 15.618706][ C2] handle_softirqs (kernel/softirq.c:579) 
[ 15.618710][ C2] __irq_exit_rcu (kernel/softirq.c:614 kernel/softirq.c:453 kernel/softirq.c:680) 
[ 15.618713][ C2] irq_exit_rcu (kernel/softirq.c:698) 
[ 15.618716][ C2] sysvec_apic_timer_interrupt (arch/x86/kernel/apic/apic.c:1049 arch/x86/kernel/apic/apic.c:1049) 
[   15.618720][    C2]  </IRQ>
[   15.618721][    C2]  <TASK>
[ 15.618722][ C2] asm_sysvec_apic_timer_interrupt (./arch/x86/include/asm/idtentry.h:702) 
[ 15.618725][ C2] RIP: 0010:pv_native_safe_halt (arch/x86/kernel/paravirt.c:81) 
[ 15.618730][ 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
[   15.618733][    C2] RSP: 0018:ffffc90000147de8 EFLAGS: 00000242
[   15.618736][    C2] RAX: 000000000003c3b9 RBX: 1ffff92000028fc1 RCX: ffffffff9ef5ba19
[   15.618738][    C2] RDX: 0000000000000000 RSI: ffffffff9fa87785 RDI: ffffffff9f251260
[   15.618740][    C2] RBP: 0000000000000000 R08: 0000000000000001 R09: ffffed1006c2667a
[   15.618742][    C2] R10: ffff8880361333d3 R11: 0000000000000000 R12: 0000000000000000
[   15.618743][    C2] R13: ffff888001bf2340 R14: dffffc0000000000 R15: 0000000000000000
[ 15.618747][ C2] ? ct_kernel_exit.constprop.0 (kernel/context_tracking.c:146) 
[ 15.618752][ C2] default_idle (./arch/x86/include/asm/paravirt.h:107 arch/x86/kernel/process.c:748) 
[ 15.618754][ C2] default_idle_call (./include/linux/cpuidle.h:143 kernel/sched/idle.c:118) 
[ 15.618756][ C2] cpuidle_idle_call (kernel/sched/idle.c:186) 
[ 15.618760][ C2] ? __pfx_cpuidle_idle_call (kernel/sched/idle.c:168) 
[ 15.618765][ C2] ? tsc_verify_tsc_adjust (arch/x86/kernel/tsc_sync.c:59) 
[ 15.618770][ C2] do_idle (kernel/sched/idle.c:325) 
[ 15.618774][ C2] cpu_startup_entry (kernel/sched/idle.c:422 (discriminator 1)) 
[ 15.618778][ C2] start_secondary (arch/x86/kernel/smpboot.c:203 arch/x86/kernel/smpboot.c:283) 
[ 15.618781][ C2] ? __pfx_start_secondary (arch/x86/kernel/smpboot.c:233) 
[ 15.618786][ C2] common_startup_64 (arch/x86/kernel/head_64.S:419) 
| [   17.462921][    C3] INFO: lockdep is turned off.
| [   17.463146][    C3] Preemption disabled at:
| [ 17.463148][ C3] handle_softirqs (kernel/softirq.c:553) 
| [   17.463580][    C3] Tainted: [W]=WARN
[   17.463582][    C3] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[   17.463584][    C3] Call Trace:
[   17.463586][    C3]  <IRQ>
[ 17.463588][ C3] dump_stack_lvl (lib/dump_stack.c:123) 
[ 17.463598][ C3] __might_resched (kernel/sched/core.c:8819) 
[ 17.463606][ C3] down_write (./include/linux/kernel.h:73 kernel/locking/rwsem.c:1576) 
[ 17.463611][ C3] ? __pfx_down_write (kernel/locking/rwsem.c:1575) 
[ 17.463615][ C3] ? simple_recursive_removal (./include/linux/dcache.h:345 fs/libfs.c:610) 
[ 17.463622][ C3] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:736) 
[ 17.463631][ 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) 
[ 17.463637][ C3] simple_recursive_removal (./include/linux/dcache.h:409 ./include/linux/dcache.h:424 ./include/linux/dcache.h:434 fs/libfs.c:616) 
[ 17.463640][ C3] ? __pfx_remove_one (fs/debugfs/inode.c:780) 
[ 17.463646][ 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) 
[ 17.463651][ C3] debugfs_remove (fs/debugfs/inode.c:806 fs/debugfs/inode.c:799) 
[ 17.463654][ C3] ref_tracker_dir_exit (lib/ref_tracker.c:423 lib/ref_tracker.c:195) 
[ 17.463660][ C3] ? __pfx_ref_tracker_free (lib/ref_tracker.c:253) 
[ 17.463664][ 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) 
[ 17.463671][ C3] ? rcu_do_batch (./include/linux/rcupdate.h:341 kernel/rcu/tree.c:2570) 
[ 17.463677][ C3] ? __pfx_ref_tracker_dir_exit (lib/ref_tracker.c:189) 
[ 17.463680][ C3] ? irq_exit_rcu (kernel/softirq.c:698) 
[ 17.463682][ C3] ? sysvec_apic_timer_interrupt (arch/x86/kernel/apic/apic.c:1049 arch/x86/kernel/apic/apic.c:1049) 
[ 17.463688][ C3] ? asm_sysvec_apic_timer_interrupt (./arch/x86/include/asm/idtentry.h:702) 
[ 17.463693][ C3] ? __orc_find (arch/x86/kernel/unwind_orc.c:80 arch/x86/kernel/unwind_orc.c:102) 
[ 17.463699][ C3] ? unwind_next_frame (arch/x86/kernel/unwind_orc.c:495) 
[ 17.463703][ C3] ? arch_stack_walk (arch/x86/kernel/stacktrace.c:24) 
[ 17.463707][ C3] ? stack_trace_save (kernel/stacktrace.c:123) 
[ 17.463712][ C3] ? kasan_save_stack (mm/kasan/common.c:48) 
[ 17.463716][ C3] ? kasan_record_aux_stack (mm/kasan/generic.c:548) 
[ 17.463720][ C3] ? __call_rcu_common.constprop.0 (./arch/x86/include/asm/irqflags.h:26 ./arch/x86/include/asm/irqflags.h:109 ./arch/x86/include/asm/irqflags.h:127 kernel/rcu/tree.c:3084) 
[ 17.463725][ C3] ? kfree (./include/linux/kmemleak.h:49 mm/slub.c:2305 mm/slub.c:4642 mm/slub.c:4841) 
[ 17.463729][ C3] ? bpf_sk_storage_free (./include/linux/rcupdate.h:341 ./include/linux/rcupdate.h:871 net/core/bpf_sk_storage.c:61) 
[ 17.463733][ C3] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:736) 
[ 17.463738][ C3] __put_net (net/core/net_namespace.c:732) 
[ 17.463743][ C3] __sk_destruct (./include/net/net_namespace.h:288 ./include/net/net_namespace.h:390 net/core/sock.c:2366) 
[ 17.463746][ C3] ? rcu_do_batch (kernel/rcu/tree.c:2568) 
[ 17.463749][ C3] rcu_do_batch (./include/linux/rcupdate.h:341 kernel/rcu/tree.c:2570) 
[ 17.463755][ C3] ? __pfx_rcu_do_batch (kernel/rcu/tree.c:2492) 
[ 17.463759][ C3] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:736) 
[ 17.463762][ C3] ? trace_irq_enable.constprop.0 (./include/trace/events/preemptirq.h:40) 
[ 17.463768][ C3] rcu_core (kernel/rcu/tree.c:2826) 
[ 17.463771][ C3] handle_softirqs (kernel/softirq.c:579) 
[ 17.463776][ C3] __irq_exit_rcu (kernel/softirq.c:614 kernel/softirq.c:453 kernel/softirq.c:680) 
[ 17.463779][ C3] irq_exit_rcu (kernel/softirq.c:698) 
[ 17.463781][ C3] sysvec_apic_timer_interrupt (arch/x86/kernel/apic/apic.c:1049 arch/x86/kernel/apic/apic.c:1049) 
[   17.463784][    C3]  </IRQ>
[   17.463785][    C3]  <TASK>
[ 17.463787][ C3] asm_sysvec_apic_timer_interrupt (./arch/x86/include/asm/idtentry.h:702) 
[ 17.463790][ C3] RIP: 0010:__orc_find (arch/x86/kernel/unwind_orc.c:80 arch/x86/kernel/unwind_orc.c:102) 
[ 17.463794][ C3] Code: ea 3f 48 c1 fe 02 48 01 f2 48 d1 fa 48 8d 5c 95 00 48 89 da 48 c1 ea 03 0f b6 34 0a 48 89 da 83 e2 07 83 c2 03 40 38 f2 7c 05 <40> 84 f6 75 4b 48 63 13 48 01 da 49 39 d5 73 af 4c 8d 63 fc 4c 39
All code
========
   0:	ea                   	(bad)
   1:	3f                   	(bad)
   2:	48 c1 fe 02          	sar    $0x2,%rsi
   6:	48 01 f2             	add    %rsi,%rdx
   9:	48 d1 fa             	sar    $1,%rdx
   c:	48 8d 5c 95 00       	lea    0x0(%rbp,%rdx,4),%rbx
  11:	48 89 da             	mov    %rbx,%rdx
  14:	48 c1 ea 03          	shr    $0x3,%rdx
  18:	0f b6 34 0a          	movzbl (%rdx,%rcx,1),%esi
  1c:	48 89 da             	mov    %rbx,%rdx
  1f:	83 e2 07             	and    $0x7,%edx
  22:	83 c2 03             	add    $0x3,%edx
  25:	40 38 f2             	cmp    %sil,%dl
  28:	7c 05                	jl     0x2f
  2a:*	40 84 f6             	test   %sil,%sil		<-- trapping instruction
  2d:	75 4b                	jne    0x7a
  2f:	48 63 13             	movslq (%rbx),%rdx
  32:	48 01 da             	add    %rbx,%rdx
  35:	49 39 d5             	cmp    %rdx,%r13
  38:	73 af                	jae    0xffffffffffffffe9
  3a:	4c 8d 63 fc          	lea    -0x4(%rbx),%r12
  3e:	4c                   	rex.WR
  3f:	39                   	.byte 0x39

Code starting with the faulting instruction
===========================================
   0:	40 84 f6             	test   %sil,%sil
   3:	75 4b                	jne    0x50
   5:	48 63 13             	movslq (%rbx),%rdx
   8:	48 01 da             	add    %rbx,%rdx
   b:	49 39 d5             	cmp    %rdx,%r13
   e:	73 af                	jae    0xffffffffffffffbf
  10:	4c 8d 63 fc          	lea    -0x4(%rbx),%r12
  14:	4c                   	rex.WR
  15:	39                   	.byte 0x39
[   17.463797][    C3] RSP: 0018:ffffc90000707808 EFLAGS: 00000206
[   17.463801][    C3] RAX: ffffffffa0d2be02 RBX: ffffffffa0a1ab58 RCX: dffffc0000000000
[   17.463803][    C3] RDX: 0000000000000003 RSI: 0000000000000000 RDI: ffffffffa0a1ab18
[   17.463804][    C3] RBP: ffffffffa0a1ab18 R08: 0000000000000000 R09: ffffc90000707989
[   17.463806][    C3] R10: ffffffff9c60c3f7 R11: ffffc90000707988 R12: ffffffffa0a1ab9c
[   17.463808][    C3] R13: ffffffff9c00012f R14: ffffffffa0a1ab18 R15: ffffffffa0a1ab18
[ 17.463810][ C3] ? entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:121) 
[ 17.463813][ C3] ? unwind_next_frame (./include/linux/rcupdate.h:331 ./include/linux/rcupdate.h:841 ./include/linux/rcupdate.h:1155 arch/x86/kernel/unwind_orc.c:479) 
[ 17.463820][ C3] unwind_next_frame (arch/x86/kernel/unwind_orc.c:495) 
[ 17.463824][ C3] ? entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:130) 
[ 17.463828][ C3] ? __pfx_unwind_next_frame (arch/x86/kernel/unwind_orc.c:469) 
[ 17.463832][ C3] ? entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:130) 
[ 17.463834][ C3] ? kernel_text_address (kernel/extable.c:99) 
[ 17.463839][ C3] ? __pfx_stack_trace_consume_entry (kernel/stacktrace.c:83) 
[ 17.463843][ C3] arch_stack_walk (arch/x86/kernel/stacktrace.c:24) 
[ 17.463848][ C3] ? entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:130) 
[ 17.463868][ C3] stack_trace_save (kernel/stacktrace.c:123) 
[ 17.463871][ C3] ? __pfx_stack_trace_save (kernel/stacktrace.c:114) 
[ 17.463874][ C3] ? stack_depot_save_flags (lib/stackdepot.c:552 lib/stackdepot.c:619) 
[ 17.463880][ C3] kasan_save_stack (mm/kasan/common.c:48) 
[ 17.463883][ C3] ? kasan_save_stack (mm/kasan/common.c:48) 
[ 17.463886][ C3] ? kasan_record_aux_stack (mm/kasan/generic.c:548) 
[ 17.463889][ C3] ? __call_rcu_common.constprop.0 (./arch/x86/include/asm/irqflags.h:26 ./arch/x86/include/asm/irqflags.h:109 ./arch/x86/include/asm/irqflags.h:127 kernel/rcu/tree.c:3084) 
[ 17.463893][ C3] ? kfree (./include/linux/kmemleak.h:49 mm/slub.c:2305 mm/slub.c:4642 mm/slub.c:4841) 
[ 17.463896][ C3] ? fuse_release (fs/fuse/file.c:383) 
[ 17.463900][ C3] ? __fput (fs/file_table.c:465) 
[ 17.463904][ C3] ? task_work_run (kernel/task_work.c:227 (discriminator 1)) 
[ 17.463907][ C3] ? do_exit (kernel/exit.c:954) 
[ 17.463911][ C3] ? do_group_exit (kernel/exit.c:1083) 
[ 17.463913][ C3] ? __x64_sys_exit_group (kernel/exit.c:1111) 
[ 17.463916][ C3] ? x64_sys_call (arch/x86/entry/syscall_64.c:37) 
[ 17.463924][ C3] ? do_syscall_64 (arch/x86/entry/syscall_64.c:63 arch/x86/entry/syscall_64.c:94) 
[ 17.463927][ C3] ? entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:130) 
[ 17.463929][ C3] ? do_raw_spin_lock (./arch/x86/include/asm/atomic.h:107 ./include/linux/atomic/atomic-arch-fallback.h:2170 ./include/linux/atomic/atomic-instrumented.h:1302 ./include/asm-generic/qspinlock.h:111 kernel/locking/spinlock_debug.c:116) 
[ 17.463932][ C3] ? __pfx_do_raw_spin_lock (kernel/locking/spinlock_debug.c:114) 
[ 17.463935][ C3] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:736) 
[ 17.463940][ C3] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:736) 
[ 17.463943][ C3] ? trace_irq_enable.constprop.0 (./include/trace/events/preemptirq.h:40) 
[ 17.463946][ C3] ? _raw_spin_unlock_irqrestore (./arch/x86/include/asm/preempt.h:104 ./include/linux/spinlock_api_smp.h:152 kernel/locking/spinlock.c:194) 
[ 17.463951][ C3] ? debug_object_active_state (lib/debugobjects.c:1056) 
[ 17.463956][ C3] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:736) 
[ 17.463960][ C3] ? __virt_addr_valid (./include/linux/rcupdate.h:341 ./include/linux/rcupdate.h:953 ./include/linux/mmzone.h:2127 arch/x86/mm/physaddr.c:65) 
[ 17.463962][ C3] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:736) 
[ 17.463966][ C3] ? trace_lock_release (./include/trace/events/lock.h:69 (discriminator 21)) 
[ 17.463970][ C3] ? lock_release (kernel/locking/lockdep.c:118 kernel/locking/lockdep.c:5879) 
[ 17.463972][ C3] ? __virt_addr_valid (./arch/x86/include/asm/preempt.h:104 ./include/linux/rcupdate.h:955 ./include/linux/mmzone.h:2127 arch/x86/mm/physaddr.c:65) 
[ 17.463976][ C3] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:736) 
[ 17.463980][ C3] kasan_record_aux_stack (mm/kasan/generic.c:548) 
[ 17.463983][ C3] ? __pfx_free_object_rcu (mm/kmemleak.c:524) 
[ 17.463987][ C3] __call_rcu_common.constprop.0 (./arch/x86/include/asm/irqflags.h:26 ./arch/x86/include/asm/irqflags.h:109 ./arch/x86/include/asm/irqflags.h:127 kernel/rcu/tree.c:3084) 
[ 17.463992][ C3] kfree (./include/linux/kmemleak.h:49 mm/slub.c:2305 mm/slub.c:4642 mm/slub.c:4841) 
[ 17.463995][ C3] ? fuse_release (fs/fuse/file.c:383) 
[ 17.464000][ C3] fuse_release (fs/fuse/file.c:383) 
[ 17.464004][ C3] __fput (fs/file_table.c:465) 
[ 17.464009][ C3] task_work_run (kernel/task_work.c:227 (discriminator 1)) 
[ 17.464013][ C3] ? __pfx_task_work_run (kernel/task_work.c:195) 
[ 17.464017][ 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) 
[ 17.464021][ C3] do_exit (kernel/exit.c:954) 
[ 17.464025][ C3] do_group_exit (kernel/exit.c:1083) 
[ 17.464029][ C3] __x64_sys_exit_group (kernel/exit.c:1111) 
[ 17.464032][ C3] x64_sys_call (arch/x86/entry/syscall_64.c:37) 
[ 17.464035][ C3] do_syscall_64 (arch/x86/entry/syscall_64.c:63 arch/x86/entry/syscall_64.c:94) 
[ 17.464038][ C3] entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:130) 
[   17.464040][    C3] RIP: 0033:0x7f3a02d59abd
[ 17.464044][ C3] Code: Unable to access opcode bytes at 0x7f3a02d59a93.

Code starting with the faulting instruction
===========================================
[   17.464045][    C3] RSP: 002b:00007ffee7a8e458 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7
[   17.464048][    C3] RAX: ffffffffffffffda RBX: 00007f3a02e369c0 RCX: 00007f3a02d59abd
[   17.464050][    C3] RDX: 00000000000000e7 RSI: ffffffffffffff80 RDI: 0000000000000000
[   17.464052][    C3] RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000038
[   17.464054][    C3] R10: 00007ffee7a8e2c0 R11: 0000000000000246 R12: 00007f3a02e369c0


Finger prints:
handle_softirqs:dump_stack_lvl:__might_resched:down_write:simple_recursive_removal
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