======================================
| [   16.126233][    C3] 1 lock held by swapper/3/0:
| [ 16.126424][ C3] #0: ffffffffa83749c0 (rcu_callback){....}-{0:0}, at: rcu_do_batch (./include/linux/rcupdate.h:331 kernel/rcu/tree.c:2562) 
| [   16.126765][    C3]
| [   16.126765][    C3] stack backtrace:
[   16.127004][    C3] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[   16.127006][    C3] Call Trace:
[   16.127008][    C3]  <IRQ>
[ 16.127010][ C3] dump_stack_lvl (lib/dump_stack.c:123) 
[ 16.127016][ C3] print_usage_bug.part.0 (kernel/locking/lockdep.c:4046) 
[ 16.127021][ C3] mark_lock_irq (kernel/locking/lockdep.c:4011 kernel/locking/lockdep.c:4057 kernel/locking/lockdep.c:4268) 
[ 16.127026][ C3] ? __pfx_unwind_next_frame (arch/x86/kernel/unwind_orc.c:469) 
[ 16.127032][ C3] ? save_trace (kernel/locking/lockdep.c:594) 
[ 16.127036][ C3] mark_lock (kernel/locking/lockdep.c:4754) 
[ 16.127040][ C3] mark_usage (kernel/locking/lockdep.c:4643) 
[ 16.127044][ C3] __lock_acquire (kernel/locking/lockdep.c:5189) 
[ 16.127050][ C3] lock_acquire.part.0 (kernel/locking/lockdep.c:472 kernel/locking/lockdep.c:5868) 
[ 16.127052][ C3] ? simple_pin_fs (fs/libfs.c:1066) 
[ 16.127055][ C3] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:736) 
[ 16.127061][ C3] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5829) 
[ 16.127063][ C3] ? simple_pin_fs (fs/libfs.c:1066) 
[ 16.127066][ C3] _raw_spin_lock (./include/linux/spinlock_api_smp.h:134 kernel/locking/spinlock.c:154) 
[ 16.127069][ C3] ? simple_pin_fs (fs/libfs.c:1066) 
[ 16.127071][ C3] simple_pin_fs (fs/libfs.c:1066) 
[ 16.127074][ C3] debugfs_remove (fs/debugfs/inode.c:805 fs/debugfs/inode.c:799) 
[ 16.127077][ C3] ref_tracker_dir_exit (lib/ref_tracker.c:423 lib/ref_tracker.c:195) 
[ 16.127082][ C3] ? __pfx_ref_tracker_free (lib/ref_tracker.c:253) 
[ 16.127085][ 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) 
[ 16.127090][ C3] ? rcu_do_batch (./include/linux/rcupdate.h:341 kernel/rcu/tree.c:2570) 
[ 16.127094][ C3] ? __pfx_ref_tracker_dir_exit (lib/ref_tracker.c:189) 
[ 16.127097][ C3] ? irq_exit_rcu (kernel/softirq.c:698) 
[ 16.127099][ C3] ? sysvec_apic_timer_interrupt (arch/x86/kernel/apic/apic.c:1049 arch/x86/kernel/apic/apic.c:1049) 
[ 16.127103][ C3] ? asm_sysvec_apic_timer_interrupt (./arch/x86/include/asm/idtentry.h:702) 
[ 16.127107][ C3] ? pv_native_safe_halt (arch/x86/kernel/paravirt.c:81) 
[ 16.127110][ C3] ? default_idle (./arch/x86/include/asm/paravirt.h:107 arch/x86/kernel/process.c:748) 
[ 16.127112][ C3] ? default_idle_call (./include/linux/cpuidle.h:143 kernel/sched/idle.c:118) 
[ 16.127115][ C3] ? cpuidle_idle_call (kernel/sched/idle.c:186) 
[ 16.127120][ C3] ? do_idle (kernel/sched/idle.c:325) 
[ 16.127123][ C3] ? cpu_startup_entry (kernel/sched/idle.c:422 (discriminator 1)) 
[ 16.127126][ C3] ? start_secondary (arch/x86/kernel/smpboot.c:203 arch/x86/kernel/smpboot.c:283) 
[ 16.127131][ C3] ? common_startup_64 (arch/x86/kernel/head_64.S:419) 
[ 16.127137][ C3] __put_net (net/core/net_namespace.c:732) 
[ 16.127141][ C3] __sk_destruct (./include/net/net_namespace.h:288 ./include/net/net_namespace.h:390 net/core/sock.c:2366) 
[ 16.127145][ C3] ? rcu_do_batch (kernel/rcu/tree.c:2568) 
[ 16.127149][ C3] rcu_do_batch (./include/linux/rcupdate.h:341 kernel/rcu/tree.c:2570) 
[ 16.127154][ C3] ? __pfx_rcu_do_batch (kernel/rcu/tree.c:2492) 
[ 16.127158][ C3] ? __lock_release (kernel/locking/lockdep.c:5534) 
[ 16.127160][ C3] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:736) 
[ 16.127164][ C3] ? _raw_spin_unlock_irqrestore (./include/linux/spinlock_api_smp.h:151 kernel/locking/spinlock.c:194) 
[ 16.127169][ C3] rcu_core (kernel/rcu/tree.c:2826) 
[ 16.127172][ C3] handle_softirqs (kernel/softirq.c:579) 
[ 16.127177][ C3] __irq_exit_rcu (kernel/softirq.c:614 kernel/softirq.c:453 kernel/softirq.c:680) 
[ 16.127180][ C3] irq_exit_rcu (kernel/softirq.c:698) 
[ 16.127182][ C3] sysvec_apic_timer_interrupt (arch/x86/kernel/apic/apic.c:1049 arch/x86/kernel/apic/apic.c:1049) 
[   16.127185][    C3]  </IRQ>
[   16.127186][    C3]  <TASK>
[ 16.127188][ C3] asm_sysvec_apic_timer_interrupt (./arch/x86/include/asm/idtentry.h:702) 
[ 16.127191][ C3] RIP: 0010:pv_native_safe_halt (arch/x86/kernel/paravirt.c:81) 
[ 16.127195][ 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
[   16.127198][    C3] RSP: 0018:ffffc90000157de8 EFLAGS: 00000242
[   16.127201][    C3] RAX: 0000000000043b19 RBX: 1ffff9200002afc1 RCX: ffffffffa735ba19
[   16.127203][    C3] RDX: 0000000000000000 RSI: ffffffffa7e87785 RDI: ffffffffa7651260
[   16.127205][    C3] RBP: 0000000000000000 R08: 0000000000000001 R09: ffffed1006c3667a
[   16.127206][    C3] R10: ffff8880361b33d3 R11: 0000000000000000 R12: 0000000000000000
[   16.127208][    C3] R13: ffff888001bf4640 R14: dffffc0000000000 R15: 0000000000000000
[ 16.127212][ C3] ? ct_kernel_exit.constprop.0 (kernel/context_tracking.c:146) 
[ 16.127216][ C3] default_idle (./arch/x86/include/asm/paravirt.h:107 arch/x86/kernel/process.c:748) 
[ 16.127219][ C3] default_idle_call (./include/linux/cpuidle.h:143 kernel/sched/idle.c:118) 
[ 16.127221][ C3] cpuidle_idle_call (kernel/sched/idle.c:186) 
[ 16.127225][ C3] ? __pfx_cpuidle_idle_call (kernel/sched/idle.c:168) 
[ 16.127229][ C3] ? tsc_verify_tsc_adjust (arch/x86/kernel/tsc_sync.c:59) 
[ 16.127234][ C3] do_idle (kernel/sched/idle.c:325) 
[ 16.127238][ C3] cpu_startup_entry (kernel/sched/idle.c:422 (discriminator 1)) 
[ 16.127242][ C3] start_secondary (arch/x86/kernel/smpboot.c:203 arch/x86/kernel/smpboot.c:283) 
[ 16.127246][ C3] ? __pfx_start_secondary (arch/x86/kernel/smpboot.c:233) 
[ 16.127251][ C3] common_startup_64 (arch/x86/kernel/head_64.S:419) 
| [   16.143196][    C3] RCU nest depth: 0, expected: 0
| [   16.143373][    C3] INFO: lockdep is turned off.
| [   16.143554][    C3] Preemption disabled at:
| [ 16.143555][ C3] 0x0 
[   16.143873][    C3] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[   16.143875][    C3] Call Trace:
[   16.143876][    C3]  <IRQ>
[ 16.143878][ C3] dump_stack_lvl (lib/dump_stack.c:123) 
[ 16.143884][ C3] __might_resched (kernel/sched/core.c:8819) 
[ 16.143890][ C3] down_write (./include/linux/kernel.h:73 kernel/locking/rwsem.c:1576) 
[ 16.143894][ C3] ? __pfx_down_write (kernel/locking/rwsem.c:1575) 
[ 16.143897][ C3] ? simple_recursive_removal (./include/linux/dcache.h:345 fs/libfs.c:610) 
[ 16.143901][ C3] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:736) 
[ 16.143906][ 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) 
[ 16.143910][ C3] simple_recursive_removal (./include/linux/dcache.h:409 ./include/linux/dcache.h:424 ./include/linux/dcache.h:434 fs/libfs.c:616) 
[ 16.143913][ C3] ? __pfx_remove_one (fs/debugfs/inode.c:780) 
[ 16.143917][ 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) 
[ 16.143921][ C3] debugfs_remove (fs/debugfs/inode.c:806 fs/debugfs/inode.c:799) 
[ 16.143924][ C3] ref_tracker_dir_exit (lib/ref_tracker.c:423 lib/ref_tracker.c:195) 
[ 16.143929][ C3] ? __pfx_ref_tracker_free (lib/ref_tracker.c:253) 
[ 16.143932][ 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) 
[ 16.143936][ C3] ? rcu_do_batch (./include/linux/rcupdate.h:341 kernel/rcu/tree.c:2570) 
[ 16.143939][ C3] ? __pfx_ref_tracker_dir_exit (lib/ref_tracker.c:189) 
[ 16.143942][ C3] ? irq_exit_rcu (kernel/softirq.c:698) 
[ 16.143945][ C3] ? sysvec_apic_timer_interrupt (arch/x86/kernel/apic/apic.c:1049 arch/x86/kernel/apic/apic.c:1049) 
[ 16.143949][ C3] ? asm_sysvec_apic_timer_interrupt (./arch/x86/include/asm/idtentry.h:702) 
[ 16.143953][ C3] ? pv_native_safe_halt (arch/x86/kernel/paravirt.c:81) 
[ 16.143956][ C3] ? default_idle (./arch/x86/include/asm/paravirt.h:107 arch/x86/kernel/process.c:748) 
[ 16.143959][ C3] ? default_idle_call (./include/linux/cpuidle.h:143 kernel/sched/idle.c:118) 
[ 16.143961][ C3] ? cpuidle_idle_call (kernel/sched/idle.c:186) 
[ 16.143965][ C3] ? do_idle (kernel/sched/idle.c:325) 
[ 16.143968][ C3] ? cpu_startup_entry (kernel/sched/idle.c:422 (discriminator 1)) 
[ 16.143971][ C3] ? start_secondary (arch/x86/kernel/smpboot.c:203 arch/x86/kernel/smpboot.c:283) 
[ 16.143975][ C3] ? common_startup_64 (arch/x86/kernel/head_64.S:419) 
[ 16.143981][ C3] __put_net (net/core/net_namespace.c:732) 
[ 16.143984][ C3] __sk_destruct (./include/net/net_namespace.h:288 ./include/net/net_namespace.h:390 net/core/sock.c:2366) 
[ 16.143988][ C3] ? rcu_do_batch (kernel/rcu/tree.c:2568) 
[ 16.143991][ C3] rcu_do_batch (./include/linux/rcupdate.h:341 kernel/rcu/tree.c:2570) 
[ 16.143996][ C3] ? __pfx_rcu_do_batch (kernel/rcu/tree.c:2492) 
[ 16.144000][ C3] ? __lock_release (kernel/locking/lockdep.c:5534) 
[ 16.144003][ C3] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:736) 
[ 16.144007][ C3] ? _raw_spin_unlock_irqrestore (./include/linux/spinlock_api_smp.h:151 kernel/locking/spinlock.c:194) 
[ 16.144011][ C3] rcu_core (kernel/rcu/tree.c:2826) 
[ 16.144015][ C3] handle_softirqs (kernel/softirq.c:579) 
[ 16.144020][ C3] __irq_exit_rcu (kernel/softirq.c:614 kernel/softirq.c:453 kernel/softirq.c:680) 
[ 16.144022][ C3] irq_exit_rcu (kernel/softirq.c:698) 
[ 16.144025][ C3] sysvec_apic_timer_interrupt (arch/x86/kernel/apic/apic.c:1049 arch/x86/kernel/apic/apic.c:1049) 
[   16.144028][    C3]  </IRQ>
[   16.144029][    C3]  <TASK>
[ 16.144031][ C3] asm_sysvec_apic_timer_interrupt (./arch/x86/include/asm/idtentry.h:702) 
[ 16.144034][ C3] RIP: 0010:pv_native_safe_halt (arch/x86/kernel/paravirt.c:81) 
[ 16.144037][ 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
[   16.144040][    C3] RSP: 0018:ffffc90000157de8 EFLAGS: 00000242
[   16.144043][    C3] RAX: 0000000000043b19 RBX: 1ffff9200002afc1 RCX: ffffffffa735ba19
[   16.144045][    C3] RDX: 0000000000000000 RSI: ffffffffa7e87785 RDI: ffffffffa7651260
[   16.144047][    C3] RBP: 0000000000000000 R08: 0000000000000001 R09: ffffed1006c3667a
[   16.144049][    C3] R10: ffff8880361b33d3 R11: 0000000000000000 R12: 0000000000000000
[   16.144051][    C3] R13: ffff888001bf4640 R14: dffffc0000000000 R15: 0000000000000000
[ 16.144055][ C3] ? ct_kernel_exit.constprop.0 (kernel/context_tracking.c:146) 
[ 16.144059][ C3] default_idle (./arch/x86/include/asm/paravirt.h:107 arch/x86/kernel/process.c:748) 
[ 16.144061][ C3] default_idle_call (./include/linux/cpuidle.h:143 kernel/sched/idle.c:118) 
[ 16.144064][ C3] cpuidle_idle_call (kernel/sched/idle.c:186) 
[ 16.144068][ C3] ? __pfx_cpuidle_idle_call (kernel/sched/idle.c:168) 
[ 16.144072][ C3] ? tsc_verify_tsc_adjust (arch/x86/kernel/tsc_sync.c:59) 
[ 16.144077][ C3] do_idle (kernel/sched/idle.c:325) 
[ 16.144081][ C3] cpu_startup_entry (kernel/sched/idle.c:422 (discriminator 1)) 
[ 16.144085][ C3] start_secondary (arch/x86/kernel/smpboot.c:203 arch/x86/kernel/smpboot.c:283) 
[ 16.144088][ C3] ? __pfx_start_secondary (arch/x86/kernel/smpboot.c:233) 
[ 16.144093][ C3] common_startup_64 (arch/x86/kernel/head_64.S:419) 
| [   18.161729][    C2] INFO: lockdep is turned off.
| [   18.161960][    C2] Preemption disabled at:
| [ 18.161962][ C2] handle_softirqs (kernel/softirq.c:553) 
| [   18.162438][    C2] Tainted: [W]=WARN
[   18.162440][    C2] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[   18.162442][    C2] Call Trace:
[   18.162444][    C2]  <IRQ>
[ 18.162447][ C2] dump_stack_lvl (lib/dump_stack.c:123) 
[ 18.162456][ C2] __might_resched (kernel/sched/core.c:8819) 
[ 18.162463][ C2] down_write (./include/linux/kernel.h:73 kernel/locking/rwsem.c:1576) 
[ 18.162468][ C2] ? __pfx_down_write (kernel/locking/rwsem.c:1575) 
[ 18.162472][ C2] ? simple_recursive_removal (./include/linux/dcache.h:345 fs/libfs.c:610) 
[ 18.162478][ C2] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:736) 
[ 18.162486][ 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) 
[ 18.162492][ C2] simple_recursive_removal (./include/linux/dcache.h:409 ./include/linux/dcache.h:424 ./include/linux/dcache.h:434 fs/libfs.c:616) 
[ 18.162495][ C2] ? __pfx_remove_one (fs/debugfs/inode.c:780) 
[ 18.162500][ 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) 
[ 18.162505][ C2] debugfs_remove (fs/debugfs/inode.c:806 fs/debugfs/inode.c:799) 
[ 18.162508][ C2] ref_tracker_dir_exit (lib/ref_tracker.c:423 lib/ref_tracker.c:195) 
[ 18.162514][ C2] ? __pfx_ref_tracker_free (lib/ref_tracker.c:253) 
[ 18.162518][ 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) 
[ 18.162524][ C2] ? rcu_do_batch (./include/linux/rcupdate.h:341 kernel/rcu/tree.c:2570) 
[ 18.162529][ C2] ? __pfx_ref_tracker_dir_exit (lib/ref_tracker.c:189) 
[ 18.162533][ C2] ? irq_exit_rcu (kernel/softirq.c:698) 
[ 18.162535][ C2] ? sysvec_apic_timer_interrupt (arch/x86/kernel/apic/apic.c:1049 arch/x86/kernel/apic/apic.c:1049) 
[ 18.162541][ C2] ? asm_sysvec_apic_timer_interrupt (./arch/x86/include/asm/idtentry.h:702) 
[ 18.162545][ C2] ? orc_find.part.0 (arch/x86/kernel/unwind_orc.c:218) 
[ 18.162551][ C2] ? unwind_next_frame (arch/x86/kernel/unwind_orc.c:495) 
[ 18.162555][ C2] ? arch_stack_walk (arch/x86/kernel/stacktrace.c:24) 
[ 18.162559][ C2] ? stack_trace_save (kernel/stacktrace.c:123) 
[ 18.162565][ C2] ? kasan_save_stack (mm/kasan/common.c:48) 
[ 18.162571][ C2] ? kasan_record_aux_stack (mm/kasan/generic.c:548) 
[ 18.162575][ C2] ? __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) 
[ 18.162580][ C2] ? kmem_cache_free (./include/linux/kmemleak.h:49 mm/slub.c:2305 mm/slub.c:4642 mm/slub.c:4744) 
[ 18.162586][ C2] ? bpf_sk_storage_free (./include/linux/rcupdate.h:341 ./include/linux/rcupdate.h:871 net/core/bpf_sk_storage.c:61) 
[ 18.162592][ C2] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:736) 
[ 18.162597][ C2] __put_net (net/core/net_namespace.c:732) 
[ 18.162601][ C2] __sk_destruct (./include/net/net_namespace.h:288 ./include/net/net_namespace.h:390 net/core/sock.c:2366) 
[ 18.162605][ C2] ? rcu_do_batch (kernel/rcu/tree.c:2568) 
[ 18.162608][ C2] rcu_do_batch (./include/linux/rcupdate.h:341 kernel/rcu/tree.c:2570) 
[ 18.162613][ C2] ? clockevents_program_event (kernel/time/clockevents.c:326) 
[ 18.162617][ C2] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:736) 
[ 18.162622][ C2] ? __pfx_rcu_do_batch (kernel/rcu/tree.c:2492) 
[ 18.162626][ C2] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:736) 
[ 18.162629][ C2] ? trace_irq_enable.constprop.0 (./include/trace/events/preemptirq.h:40) 
[ 18.162635][ C2] rcu_core (kernel/rcu/tree.c:2826) 
[ 18.162639][ C2] handle_softirqs (kernel/softirq.c:579) 
[ 18.162643][ C2] __irq_exit_rcu (kernel/softirq.c:614 kernel/softirq.c:453 kernel/softirq.c:680) 
[ 18.162646][ C2] irq_exit_rcu (kernel/softirq.c:698) 
[ 18.162648][ C2] sysvec_apic_timer_interrupt (arch/x86/kernel/apic/apic.c:1049 arch/x86/kernel/apic/apic.c:1049) 
[   18.162651][    C2]  </IRQ>
[   18.162652][    C2]  <TASK>
[ 18.162654][ C2] asm_sysvec_apic_timer_interrupt (./arch/x86/include/asm/idtentry.h:702) 
[ 18.162657][ C2] RIP: 0010:orc_find.part.0 (arch/x86/kernel/unwind_orc.c:218) 
[ 18.162661][ C2] Code: 48 b8 00 00 00 00 00 fc ff df 48 8d 3c 9d 48 5a 5c a9 48 89 fa 48 c1 ea 03 0f b6 14 02 48 89 f8 83 e0 07 83 c0 03 38 d0 7c 08 <84> d2 0f 85 0c 02 00 00 44 89 f0 8b 14 9d 48 5a 5c a9 48 8d 0c 40
All code
========
   0:	48 b8 00 00 00 00 00 	movabs $0xdffffc0000000000,%rax
   7:	fc ff df 
   a:	48 8d 3c 9d 48 5a 5c 	lea    -0x56a3a5b8(,%rbx,4),%rdi
  11:	a9 
  12:	48 89 fa             	mov    %rdi,%rdx
  15:	48 c1 ea 03          	shr    $0x3,%rdx
  19:	0f b6 14 02          	movzbl (%rdx,%rax,1),%edx
  1d:	48 89 f8             	mov    %rdi,%rax
  20:	83 e0 07             	and    $0x7,%eax
  23:	83 c0 03             	add    $0x3,%eax
  26:	38 d0                	cmp    %dl,%al
  28:	7c 08                	jl     0x32
  2a:*	84 d2                	test   %dl,%dl		<-- trapping instruction
  2c:	0f 85 0c 02 00 00    	jne    0x23e
  32:	44 89 f0             	mov    %r14d,%eax
  35:	8b 14 9d 48 5a 5c a9 	mov    -0x56a3a5b8(,%rbx,4),%edx
  3c:	48 8d 0c 40          	lea    (%rax,%rax,2),%rcx

Code starting with the faulting instruction
===========================================
   0:	84 d2                	test   %dl,%dl
   2:	0f 85 0c 02 00 00    	jne    0x214
   8:	44 89 f0             	mov    %r14d,%eax
   b:	8b 14 9d 48 5a 5c a9 	mov    -0x56a3a5b8(,%rbx,4),%edx
  12:	48 8d 0c 40          	lea    (%rax,%rax,2),%rcx
[   18.162664][    C2] RSP: 0018:ffffc900008175a8 EFLAGS: 00000206
[   18.162668][    C2] RAX: 0000000000000003 RBX: 0000000000000002 RCX: 0000000000000002
[   18.162670][    C2] RDX: 0000000000000000 RSI: ffffffffa76511e0 RDI: ffffffffa95c5a50
[   18.162672][    C2] RBP: 0000000000000001 R08: 0000000000000000 R09: ffffc90000817729
[   18.162673][    C2] R10: ffffffffa4a0c3f7 R11: ffffc90000817728 R12: ffffffffa440012f
[   18.162675][    C2] R13: 000000000002f825 R14: 0000000000000003 R15: 0000000000000000
[ 18.162677][ C2] ? entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:121) 
[ 18.162680][ C2] ? 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) 
[ 18.162688][ C2] unwind_next_frame (arch/x86/kernel/unwind_orc.c:495) 
[ 18.162691][ C2] ? entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:130) 
[ 18.162695][ C2] ? __pfx_unwind_next_frame (arch/x86/kernel/unwind_orc.c:469) 
[ 18.162700][ C2] ? entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:130) 
[ 18.162703][ C2] ? kernel_text_address (kernel/extable.c:99) 
[ 18.162709][ C2] ? __pfx_stack_trace_consume_entry (kernel/stacktrace.c:83) 
[ 18.162713][ C2] arch_stack_walk (arch/x86/kernel/stacktrace.c:24) 
[ 18.162719][ C2] ? entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:130) 
[ 18.162722][ C2] stack_trace_save (kernel/stacktrace.c:123) 
[ 18.162726][ C2] ? __pfx_stack_trace_save (kernel/stacktrace.c:114) 
[ 18.162729][ C2] ? stack_trace_save (kernel/stacktrace.c:123) 
[ 18.162732][ C2] ? stack_depot_save_flags (lib/stackdepot.c:552 lib/stackdepot.c:619) 
[ 18.162737][ C2] kasan_save_stack (mm/kasan/common.c:48) 
[ 18.162741][ C2] ? kasan_save_stack (mm/kasan/common.c:48) 
[ 18.162744][ C2] ? kasan_record_aux_stack (mm/kasan/generic.c:548) 
[ 18.162746][ C2] ? __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) 
[ 18.162750][ C2] ? kmem_cache_free (./include/linux/kmemleak.h:49 mm/slub.c:2305 mm/slub.c:4642 mm/slub.c:4744) 
[ 18.162753][ C2] ? unlink_anon_vmas (mm/rmap.c:405 (discriminator 2)) 
[ 18.162758][ C2] ? free_pgtables (mm/memory.c:392) 
[ 18.162764][ C2] ? exit_mmap (mm/mmap.c:1297) 
[ 18.162767][ C2] ? mmput (kernel/fork.c:1447 kernel/fork.c:1382 kernel/fork.c:1402) 
[ 18.162773][ C2] ? exit_mm (kernel/exit.c:590) 
[ 18.162776][ C2] ? do_exit (kernel/exit.c:943) 
[ 18.162779][ C2] ? do_group_exit (kernel/exit.c:1083) 
[ 18.162782][ C2] ? __x64_sys_exit_group (kernel/exit.c:1111) 
[ 18.162785][ C2] ? x64_sys_call (arch/x86/entry/syscall_64.c:37) 
[ 18.162791][ C2] ? do_syscall_64 (arch/x86/entry/syscall_64.c:63 arch/x86/entry/syscall_64.c:94) 
[ 18.162794][ C2] ? entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:130) 
[ 18.162797][ C2] ? __pfx_do_raw_spin_lock (kernel/locking/spinlock_debug.c:114) 
[ 18.162800][ C2] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:736) 
[ 18.162804][ C2] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:736) 
[ 18.162807][ C2] ? trace_irq_enable.constprop.0 (./include/trace/events/preemptirq.h:40) 
[ 18.162811][ C2] ? _raw_spin_unlock_irqrestore (./arch/x86/include/asm/preempt.h:104 ./include/linux/spinlock_api_smp.h:152 kernel/locking/spinlock.c:194) 
[ 18.162816][ C2] ? debug_object_active_state (lib/debugobjects.c:1056) 
[ 18.162822][ C2] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:736) 
[ 18.162825][ C2] ? __virt_addr_valid (./include/linux/rcupdate.h:341 ./include/linux/rcupdate.h:953 ./include/linux/mmzone.h:2127 arch/x86/mm/physaddr.c:65) 
[ 18.162829][ C2] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:736) 
[ 18.162832][ C2] ? trace_lock_release (./include/trace/events/lock.h:69 (discriminator 21)) 
[ 18.162836][ C2] ? lock_release (kernel/locking/lockdep.c:118 kernel/locking/lockdep.c:5879) 
[ 18.162838][ C2] ? __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) 
[ 18.162841][ C2] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:736) 
[ 18.162845][ C2] kasan_record_aux_stack (mm/kasan/generic.c:548) 
[ 18.162848][ C2] ? __pfx_free_object_rcu (mm/kmemleak.c:524) 
[ 18.162853][ C2] __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) 
[ 18.162857][ C2] kmem_cache_free (./include/linux/kmemleak.h:49 mm/slub.c:2305 mm/slub.c:4642 mm/slub.c:4744) 
[ 18.162861][ C2] ? unlink_anon_vmas (mm/rmap.c:405 (discriminator 2)) 
[ 18.162865][ C2] unlink_anon_vmas (mm/rmap.c:405 (discriminator 2)) 
[ 18.162869][ C2] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:736) 
[ 18.162874][ C2] free_pgtables (mm/memory.c:392) 
[ 18.162879][ C2] ? __pfx_free_pgtables (mm/memory.c:349) 
[ 18.162882][ C2] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5829) 
[ 18.162884][ C2] ? exit_mmap (./include/linux/seqlock.h:431 ./include/linux/mmap_lock.h:82 ./include/linux/mmap_lock.h:129 mm/mmap.c:1292) 
[ 18.162888][ C2] ? down_write (./arch/x86/include/asm/preempt.h:104 kernel/locking/rwsem.c:1307 kernel/locking/rwsem.c:1313 kernel/locking/rwsem.c:1578) 
[ 18.162891][ C2] ? __pfx_down_write (kernel/locking/rwsem.c:1575) 
[ 18.162893][ C2] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:736) 
[ 18.162897][ C2] ? trace_lock_release (./include/trace/events/lock.h:69 (discriminator 21)) 
[ 18.162901][ C2] exit_mmap (mm/mmap.c:1297) 
[ 18.162905][ C2] ? __pfx_exit_mmap (mm/mmap.c:1259) 
[ 18.162908][ C2] ? __mutex_lock (./arch/x86/include/asm/preempt.h:104 kernel/locking/mutex.c:727 kernel/locking/mutex.c:746) 
[ 18.162912][ C2] ? lock_release (kernel/locking/lockdep.c:118 kernel/locking/lockdep.c:5879) 
[ 18.162914][ C2] ? __mutex_unlock_slowpath (./arch/x86/include/asm/atomic64_64.h:101 ./include/linux/atomic/atomic-arch-fallback.h:4329 ./include/linux/atomic/atomic-long.h:1506 ./include/linux/atomic/atomic-instrumented.h:4481 kernel/locking/mutex.c:924) 
[ 18.162922][ C2] mmput (kernel/fork.c:1447 kernel/fork.c:1382 kernel/fork.c:1402) 
[ 18.162926][ C2] exit_mm (kernel/exit.c:590) 
[ 18.162929][ C2] do_exit (kernel/exit.c:943) 
[ 18.162933][ C2] do_group_exit (kernel/exit.c:1083) 
[ 18.162937][ C2] __x64_sys_exit_group (kernel/exit.c:1111) 
[ 18.162940][ C2] x64_sys_call (arch/x86/entry/syscall_64.c:37) 
[ 18.162943][ C2] do_syscall_64 (arch/x86/entry/syscall_64.c:63 arch/x86/entry/syscall_64.c:94) 
[ 18.162946][ C2] entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:130) 
[   18.162948][    C2] RIP: 0033:0x7f5feff26abd
[ 18.162952][ C2] Code: Unable to access opcode bytes at 0x7f5feff26a93.

Code starting with the faulting instruction
===========================================
[   18.162953][    C2] RSP: 002b:00007fffa1bd6308 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7
[   18.162956][    C2] RAX: ffffffffffffffda RBX: 00007f5ff00039c0 RCX: 00007f5feff26abd
[   18.162958][    C2] RDX: 00000000000000e7 RSI: ffffffffffffff80 RDI: 0000000000000000
[   18.162960][    C2] RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000030
[   18.162961][    C2] R10: 00007fffa1bd6190 R11: 0000000000000246 R12: 00007f5ff00039c0


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