======================================
| [   15.643953][    C0] 1 lock held by swapper/0/0:
| [ 15.644159][ C0] #0: ffffffff9a9749c0 (rcu_callback){....}-{0:0}, at: rcu_do_batch (./include/linux/rcupdate.h:331 kernel/rcu/tree.c:2562) 
| [   15.644525][    C0]
| [   15.644525][    C0] stack backtrace:
[   15.644799][    C0] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[   15.644801][    C0] Call Trace:
[   15.644803][    C0]  <IRQ>
[ 15.644805][ C0] dump_stack_lvl (lib/dump_stack.c:123) 
[ 15.644810][ C0] print_usage_bug.part.0 (kernel/locking/lockdep.c:4046) 
[ 15.644816][ C0] mark_lock_irq (kernel/locking/lockdep.c:4011 kernel/locking/lockdep.c:4057 kernel/locking/lockdep.c:4268) 
[ 15.644820][ C0] ? is_bpf_text_address (./include/linux/rcupdate.h:341 ./include/linux/rcupdate.h:871 kernel/bpf/core.c:774) 
[ 15.644826][ C0] ? __lock_release (kernel/locking/lockdep.c:5534) 
[ 15.644829][ C0] ? save_trace (kernel/locking/lockdep.c:594) 
[ 15.644834][ C0] mark_lock (kernel/locking/lockdep.c:4754) 
[ 15.644838][ C0] mark_usage (kernel/locking/lockdep.c:4643) 
[ 15.644842][ C0] __lock_acquire (kernel/locking/lockdep.c:5189) 
[ 15.644848][ C0] lock_acquire.part.0 (kernel/locking/lockdep.c:472 kernel/locking/lockdep.c:5868) 
[ 15.644850][ C0] ? simple_pin_fs (fs/libfs.c:1066) 
[ 15.644854][ C0] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:736) 
[ 15.644859][ C0] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5829) 
[ 15.644861][ C0] ? simple_pin_fs (fs/libfs.c:1066) 
[ 15.644864][ C0] _raw_spin_lock (./include/linux/spinlock_api_smp.h:134 kernel/locking/spinlock.c:154) 
[ 15.644867][ C0] ? simple_pin_fs (fs/libfs.c:1066) 
[ 15.644870][ C0] simple_pin_fs (fs/libfs.c:1066) 
[ 15.644873][ C0] debugfs_remove (fs/debugfs/inode.c:805 fs/debugfs/inode.c:799) 
[ 15.644876][ C0] ref_tracker_dir_exit (lib/ref_tracker.c:423 lib/ref_tracker.c:195) 
[ 15.644881][ C0] ? __pfx_ref_tracker_free (lib/ref_tracker.c:253) 
[ 15.644884][ 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) 
[ 15.644889][ C0] ? rcu_do_batch (./include/linux/rcupdate.h:341 kernel/rcu/tree.c:2570) 
[ 15.644892][ C0] ? __pfx_ref_tracker_dir_exit (lib/ref_tracker.c:189) 
[ 15.644895][ C0] ? irq_exit_rcu (kernel/softirq.c:698) 
[ 15.644897][ C0] ? sysvec_apic_timer_interrupt (arch/x86/kernel/apic/apic.c:1049 arch/x86/kernel/apic/apic.c:1049) 
[ 15.644901][ C0] ? asm_sysvec_apic_timer_interrupt (./arch/x86/include/asm/idtentry.h:702) 
[ 15.644904][ C0] ? pv_native_safe_halt (arch/x86/kernel/paravirt.c:81) 
[ 15.644907][ C0] ? default_idle (./arch/x86/include/asm/paravirt.h:107 arch/x86/kernel/process.c:748) 
[ 15.644910][ C0] ? default_idle_call (./include/linux/cpuidle.h:143 kernel/sched/idle.c:118) 
[ 15.644912][ C0] ? cpuidle_idle_call (kernel/sched/idle.c:186) 
[ 15.644916][ C0] ? do_idle (kernel/sched/idle.c:325) 
[ 15.644919][ C0] ? cpu_startup_entry (kernel/sched/idle.c:422 (discriminator 1)) 
[ 15.644922][ C0] ? rest_init (./include/linux/rcupdate.h:842 init/main.c:714) 
[ 15.644925][ C0] ? start_kernel (init/main.c:1049 (discriminator 1)) 
[ 15.644931][ C0] __put_net (net/core/net_namespace.c:732) 
[ 15.644934][ C0] __sk_destruct (./include/net/net_namespace.h:288 ./include/net/net_namespace.h:390 net/core/sock.c:2366) 
[ 15.644938][ C0] ? rcu_do_batch (kernel/rcu/tree.c:2568) 
[ 15.644941][ C0] rcu_do_batch (./include/linux/rcupdate.h:341 kernel/rcu/tree.c:2570) 
[ 15.644945][ C0] ? find_held_lock (kernel/locking/lockdep.c:5348) 
[ 15.644949][ C0] ? __pfx_rcu_do_batch (kernel/rcu/tree.c:2492) 
[ 15.644953][ C0] ? _raw_spin_unlock_irqrestore (./include/linux/spinlock_api_smp.h:151 kernel/locking/spinlock.c:194) 
[ 15.644956][ C0] ? lockdep_hardirqs_on (kernel/locking/lockdep.c:4473) 
[ 15.644960][ C0] ? _raw_spin_unlock_irqrestore (./arch/x86/include/asm/preempt.h:104 ./include/linux/spinlock_api_smp.h:152 kernel/locking/spinlock.c:194) 
[ 15.644965][ C0] rcu_core (kernel/rcu/tree.c:2826) 
[ 15.644968][ C0] handle_softirqs (kernel/softirq.c:579) 
[ 15.644973][ C0] __irq_exit_rcu (kernel/softirq.c:614 kernel/softirq.c:453 kernel/softirq.c:680) 
[ 15.644976][ C0] irq_exit_rcu (kernel/softirq.c:698) 
[ 15.644978][ C0] sysvec_apic_timer_interrupt (arch/x86/kernel/apic/apic.c:1049 arch/x86/kernel/apic/apic.c:1049) 
[   15.644982][    C0]  </IRQ>
[   15.644983][    C0]  <TASK>
[ 15.644984][ C0] asm_sysvec_apic_timer_interrupt (./arch/x86/include/asm/idtentry.h:702) 
[ 15.644987][ C0] RIP: 0010:pv_native_safe_halt (arch/x86/kernel/paravirt.c:81) 
[ 15.644991][ 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
[   15.644994][    C0] RSP: 0018:ffffffff9a607df8 EFLAGS: 00000242
[   15.644997][    C0] RAX: 000000000006d93b RBX: 1ffffffff34c0fc3 RCX: ffffffff9995ba19
[   15.644999][    C0] RDX: 0000000000000000 RSI: ffffffff9a487785 RDI: ffffffff99c51260
[   15.645001][    C0] RBP: 0000000000000000 R08: 0000000000000001 R09: ffffed1006c0667a
[   15.645003][    C0] R10: ffff8880360333d3 R11: 0000000000000000 R12: 0000000000000000
[   15.645004][    C0] R13: ffffffff9a61f240 R14: dffffc0000000000 R15: 0000000000014770
[ 15.645008][ C0] ? ct_kernel_exit.constprop.0 (kernel/context_tracking.c:146) 
[ 15.645013][ C0] default_idle (./arch/x86/include/asm/paravirt.h:107 arch/x86/kernel/process.c:748) 
[ 15.645015][ C0] default_idle_call (./include/linux/cpuidle.h:143 kernel/sched/idle.c:118) 
[ 15.645018][ C0] cpuidle_idle_call (kernel/sched/idle.c:186) 
[ 15.645022][ C0] ? __pfx_cpuidle_idle_call (kernel/sched/idle.c:168) 
[ 15.645026][ C0] ? tsc_verify_tsc_adjust (arch/x86/kernel/tsc_sync.c:59) 
[ 15.645032][ C0] do_idle (kernel/sched/idle.c:325) 
[ 15.645036][ C0] cpu_startup_entry (kernel/sched/idle.c:422 (discriminator 1)) 
[ 15.645040][ C0] rest_init (./include/linux/rcupdate.h:842 init/main.c:714) 
[ 15.645043][ C0] start_kernel (init/main.c:1049 (discriminator 1)) 
[ 15.645047][ C0] x86_64_start_reservations (arch/x86/kernel/head64.c:501) 
[ 15.645052][ C0] x86_64_start_kernel (arch/x86/kernel/head64.c:443 (discriminator 17)) 
[ 15.645056][ C0] common_startup_64 (arch/x86/kernel/head_64.S:419) 
| [   15.663735][    C0] RCU nest depth: 0, expected: 0
| [   15.663939][    C0] INFO: lockdep is turned off.
| [   15.664252][    C0] Preemption disabled at:
| [ 15.664254][ C0] schedule_preempt_disabled (kernel/sched/core.c:6919) 
[   15.664703][    C0] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[   15.664705][    C0] Call Trace:
[   15.664706][    C0]  <IRQ>
[ 15.664708][ C0] dump_stack_lvl (lib/dump_stack.c:123) 
[ 15.664713][ C0] __might_resched (kernel/sched/core.c:8819) 
[ 15.664719][ C0] down_write (./include/linux/kernel.h:73 kernel/locking/rwsem.c:1576) 
[ 15.664723][ C0] ? __pfx_down_write (kernel/locking/rwsem.c:1575) 
[ 15.664725][ C0] ? simple_recursive_removal (./include/linux/dcache.h:345 fs/libfs.c:610) 
[ 15.664729][ C0] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:736) 
[ 15.664735][ 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) 
[ 15.664739][ C0] simple_recursive_removal (./include/linux/dcache.h:409 ./include/linux/dcache.h:424 ./include/linux/dcache.h:434 fs/libfs.c:616) 
[ 15.664742][ C0] ? __pfx_remove_one (fs/debugfs/inode.c:780) 
[ 15.664745][ 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) 
[ 15.664750][ C0] debugfs_remove (fs/debugfs/inode.c:806 fs/debugfs/inode.c:799) 
[ 15.664753][ C0] ref_tracker_dir_exit (lib/ref_tracker.c:423 lib/ref_tracker.c:195) 
[ 15.664757][ C0] ? __pfx_ref_tracker_free (lib/ref_tracker.c:253) 
[ 15.664760][ 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) 
[ 15.664765][ C0] ? rcu_do_batch (./include/linux/rcupdate.h:341 kernel/rcu/tree.c:2570) 
[ 15.664769][ C0] ? __pfx_ref_tracker_dir_exit (lib/ref_tracker.c:189) 
[ 15.664772][ C0] ? irq_exit_rcu (kernel/softirq.c:698) 
[ 15.664776][ C0] ? sysvec_apic_timer_interrupt (arch/x86/kernel/apic/apic.c:1049 arch/x86/kernel/apic/apic.c:1049) 
[ 15.664780][ C0] ? asm_sysvec_apic_timer_interrupt (./arch/x86/include/asm/idtentry.h:702) 
[ 15.664784][ C0] ? pv_native_safe_halt (arch/x86/kernel/paravirt.c:81) 
[ 15.664787][ C0] ? default_idle (./arch/x86/include/asm/paravirt.h:107 arch/x86/kernel/process.c:748) 
[ 15.664789][ C0] ? default_idle_call (./include/linux/cpuidle.h:143 kernel/sched/idle.c:118) 
[ 15.664792][ C0] ? cpuidle_idle_call (kernel/sched/idle.c:186) 
[ 15.664797][ C0] ? do_idle (kernel/sched/idle.c:325) 
[ 15.664800][ C0] ? cpu_startup_entry (kernel/sched/idle.c:422 (discriminator 1)) 
[ 15.664803][ C0] ? rest_init (./include/linux/rcupdate.h:842 init/main.c:714) 
[ 15.664805][ C0] ? start_kernel (init/main.c:1049 (discriminator 1)) 
[ 15.664812][ C0] __put_net (net/core/net_namespace.c:732) 
[ 15.664815][ C0] __sk_destruct (./include/net/net_namespace.h:288 ./include/net/net_namespace.h:390 net/core/sock.c:2366) 
[ 15.664819][ C0] ? rcu_do_batch (kernel/rcu/tree.c:2568) 
[ 15.664822][ C0] rcu_do_batch (./include/linux/rcupdate.h:341 kernel/rcu/tree.c:2570) 
[ 15.664826][ C0] ? find_held_lock (kernel/locking/lockdep.c:5348) 
[ 15.664831][ C0] ? __pfx_rcu_do_batch (kernel/rcu/tree.c:2492) 
[ 15.664834][ C0] ? _raw_spin_unlock_irqrestore (./include/linux/spinlock_api_smp.h:151 kernel/locking/spinlock.c:194) 
[ 15.664839][ C0] ? lockdep_hardirqs_on (kernel/locking/lockdep.c:4473) 
[ 15.664843][ C0] ? _raw_spin_unlock_irqrestore (./arch/x86/include/asm/preempt.h:104 ./include/linux/spinlock_api_smp.h:152 kernel/locking/spinlock.c:194) 
[ 15.664847][ C0] rcu_core (kernel/rcu/tree.c:2826) 
[ 15.664851][ C0] handle_softirqs (kernel/softirq.c:579) 
[ 15.664855][ C0] __irq_exit_rcu (kernel/softirq.c:614 kernel/softirq.c:453 kernel/softirq.c:680) 
[ 15.664858][ C0] irq_exit_rcu (kernel/softirq.c:698) 
[ 15.664860][ C0] sysvec_apic_timer_interrupt (arch/x86/kernel/apic/apic.c:1049 arch/x86/kernel/apic/apic.c:1049) 
[   15.664864][    C0]  </IRQ>
[   15.664865][    C0]  <TASK>
[ 15.664867][ C0] asm_sysvec_apic_timer_interrupt (./arch/x86/include/asm/idtentry.h:702) 
[ 15.664870][ C0] RIP: 0010:pv_native_safe_halt (arch/x86/kernel/paravirt.c:81) 
[ 15.664874][ 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
[   15.664876][    C0] RSP: 0018:ffffffff9a607df8 EFLAGS: 00000242
[   15.664879][    C0] RAX: 000000000006d93b RBX: 1ffffffff34c0fc3 RCX: ffffffff9995ba19
[   15.664881][    C0] RDX: 0000000000000000 RSI: ffffffff9a487785 RDI: ffffffff99c51260
[   15.664883][    C0] RBP: 0000000000000000 R08: 0000000000000001 R09: ffffed1006c0667a
[   15.664885][    C0] R10: ffff8880360333d3 R11: 0000000000000000 R12: 0000000000000000
[   15.664886][    C0] R13: ffffffff9a61f240 R14: dffffc0000000000 R15: 0000000000014770
[ 15.664891][ C0] ? ct_kernel_exit.constprop.0 (kernel/context_tracking.c:146) 
[ 15.664895][ C0] default_idle (./arch/x86/include/asm/paravirt.h:107 arch/x86/kernel/process.c:748) 
[ 15.664904][ C0] default_idle_call (./include/linux/cpuidle.h:143 kernel/sched/idle.c:118) 
[ 15.664907][ C0] cpuidle_idle_call (kernel/sched/idle.c:186) 
[ 15.664910][ C0] ? __pfx_cpuidle_idle_call (kernel/sched/idle.c:168) 
[ 15.664915][ C0] ? tsc_verify_tsc_adjust (arch/x86/kernel/tsc_sync.c:59) 
[ 15.664920][ C0] do_idle (kernel/sched/idle.c:325) 
[ 15.664924][ C0] cpu_startup_entry (kernel/sched/idle.c:422 (discriminator 1)) 
[ 15.664928][ C0] rest_init (./include/linux/rcupdate.h:842 init/main.c:714) 
[ 15.664931][ C0] start_kernel (init/main.c:1049 (discriminator 1)) 
[ 15.664935][ C0] x86_64_start_reservations (arch/x86/kernel/head64.c:501) 
[ 15.664943][ C0] x86_64_start_kernel (arch/x86/kernel/head64.c:443 (discriminator 17)) 
[ 15.664947][ C0] common_startup_64 (arch/x86/kernel/head_64.S:419) 
| [   17.939866][    C3] INFO: lockdep is turned off.
| [   17.940066][    C3] Preemption disabled at:
| [ 17.940068][ C3] handle_softirqs (kernel/softirq.c:553) 
| [   17.940496][    C3] Tainted: [W]=WARN
[   17.940497][    C3] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[   17.940499][    C3] Call Trace:
[   17.940501][    C3]  <IRQ>
[ 17.940502][ C3] dump_stack_lvl (lib/dump_stack.c:123) 
[ 17.940510][ C3] __might_resched (kernel/sched/core.c:8819) 
[ 17.940515][ C3] down_write (./include/linux/kernel.h:73 kernel/locking/rwsem.c:1576) 
[ 17.940520][ C3] ? __pfx_down_write (kernel/locking/rwsem.c:1575) 
[ 17.940523][ C3] ? simple_recursive_removal (./include/linux/dcache.h:345 fs/libfs.c:610) 
[ 17.940527][ C3] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:736) 
[ 17.940533][ 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) 
[ 17.940538][ C3] simple_recursive_removal (./include/linux/dcache.h:409 ./include/linux/dcache.h:424 ./include/linux/dcache.h:434 fs/libfs.c:616) 
[ 17.940541][ C3] ? __pfx_remove_one (fs/debugfs/inode.c:780) 
[ 17.940546][ 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) 
[ 17.940550][ C3] debugfs_remove (fs/debugfs/inode.c:806 fs/debugfs/inode.c:799) 
[ 17.940553][ C3] ref_tracker_dir_exit (lib/ref_tracker.c:423 lib/ref_tracker.c:195) 
[ 17.940558][ C3] ? __pfx_ref_tracker_free (lib/ref_tracker.c:253) 
[ 17.940561][ 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) 
[ 17.940566][ C3] ? rcu_do_batch (./include/linux/rcupdate.h:341 kernel/rcu/tree.c:2570) 
[ 17.940571][ C3] ? __pfx_ref_tracker_dir_exit (lib/ref_tracker.c:189) 
[ 17.940573][ C3] ? irq_exit_rcu (kernel/softirq.c:698) 
[ 17.940576][ C3] ? sysvec_apic_timer_interrupt (arch/x86/kernel/apic/apic.c:1049 arch/x86/kernel/apic/apic.c:1049) 
[ 17.940580][ C3] ? asm_sysvec_apic_timer_interrupt (./arch/x86/include/asm/idtentry.h:702) 
[ 17.940584][ C3] ? get_reg (arch/x86/kernel/unwind_orc.c:449) 
[ 17.940588][ C3] ? unwind_next_frame (arch/x86/kernel/unwind_orc.c:643) 
[ 17.940592][ C3] ? arch_stack_walk (arch/x86/kernel/stacktrace.c:24) 
[ 17.940596][ C3] ? stack_trace_save (kernel/stacktrace.c:123) 
[ 17.940601][ C3] ? kasan_save_stack (mm/kasan/common.c:48) 
[ 17.940606][ C3] ? kasan_save_track (./arch/x86/include/asm/current.h:25 mm/kasan/common.c:60 mm/kasan/common.c:69) 
[ 17.940609][ C3] ? __kasan_kmalloc (mm/kasan/common.c:398) 
[ 17.940612][ C3] ? kmem_cache_free (mm/slub.c:2333 mm/slub.c:4642 mm/slub.c:4744) 
[ 17.940617][ C3] ? bpf_sk_storage_free (./include/linux/rcupdate.h:341 ./include/linux/rcupdate.h:871 net/core/bpf_sk_storage.c:61) 
[ 17.940621][ C3] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:736) 
[ 17.940626][ C3] __put_net (net/core/net_namespace.c:732) 
[ 17.940629][ C3] __sk_destruct (./include/net/net_namespace.h:288 ./include/net/net_namespace.h:390 net/core/sock.c:2366) 
[ 17.940633][ C3] ? rcu_do_batch (kernel/rcu/tree.c:2568) 
[ 17.940636][ C3] rcu_do_batch (./include/linux/rcupdate.h:341 kernel/rcu/tree.c:2570) 
[ 17.940641][ C3] ? __pfx_rcu_do_batch (kernel/rcu/tree.c:2492) 
[ 17.940645][ C3] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:736) 
[ 17.940649][ C3] ? trace_irq_enable.constprop.0 (./include/trace/events/preemptirq.h:40) 
[ 17.940655][ C3] rcu_core (kernel/rcu/tree.c:2826) 
[ 17.940659][ C3] handle_softirqs (kernel/softirq.c:579) 
[ 17.940664][ C3] __irq_exit_rcu (kernel/softirq.c:614 kernel/softirq.c:453 kernel/softirq.c:680) 
[ 17.940666][ C3] irq_exit_rcu (kernel/softirq.c:698) 
[ 17.940668][ C3] sysvec_apic_timer_interrupt (arch/x86/kernel/apic/apic.c:1049 arch/x86/kernel/apic/apic.c:1049) 
[   17.940672][    C3]  </IRQ>
[   17.940673][    C3]  <TASK>
[ 17.940674][ C3] asm_sysvec_apic_timer_interrupt (./arch/x86/include/asm/idtentry.h:702) 
[ 17.940677][ C3] RIP: 0010:get_reg (arch/x86/kernel/unwind_orc.c:449) 
[ 17.940681][ C3] Code: 8f 00 e9 2d ff ff ff 66 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 0f 1f 44 00 00 48 b8 00 00 00 00 00 fc ff df 41 57 <49> 89 d7 c1 ee 03 41 56 41 89 f6 41 55 4c 8d 6f 60 41 54 4c 89 ea
All code
========
   0:	8f 00                	pop    (%rax)
   2:	e9 2d ff ff ff       	jmp    0xffffffffffffff34
   7:	66 90                	xchg   %ax,%ax
   9:	90                   	nop
   a:	90                   	nop
   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:	0f 1f 44 00 00       	nopl   0x0(%rax,%rax,1)
  1e:	48 b8 00 00 00 00 00 	movabs $0xdffffc0000000000,%rax
  25:	fc ff df 
  28:	41 57                	push   %r15
  2a:*	49 89 d7             	mov    %rdx,%r15		<-- trapping instruction
  2d:	c1 ee 03             	shr    $0x3,%esi
  30:	41 56                	push   %r14
  32:	41 89 f6             	mov    %esi,%r14d
  35:	41 55                	push   %r13
  37:	4c 8d 6f 60          	lea    0x60(%rdi),%r13
  3b:	41 54                	push   %r12
  3d:	4c 89 ea             	mov    %r13,%rdx

Code starting with the faulting instruction
===========================================
   0:	49 89 d7             	mov    %rdx,%r15
   3:	c1 ee 03             	shr    $0x3,%esi
   6:	41 56                	push   %r14
   8:	41 89 f6             	mov    %esi,%r14d
   b:	41 55                	push   %r13
   d:	4c 8d 6f 60          	lea    0x60(%rdi),%r13
  11:	41 54                	push   %r12
  13:	4c 89 ea             	mov    %r13,%rdx
[   17.940684][    C3] RSP: 0018:ffffc900009e75c8 EFLAGS: 00000246
[   17.940687][    C3] RAX: dffffc0000000000 RBX: 1ffff9200013cec4 RCX: 0000000000000001
[   17.940689][    C3] RDX: ffffc900009e7660 RSI: 0000000000000020 RDI: ffffc900009e76d8
[   17.940691][    C3] RBP: 0000000000000001 R08: 0000000000000000 R09: ffffc900009e7719
[   17.940693][    C3] R10: ffffffff9700c3f7 R11: ffffc900009e7718 R12: ffffffff9b72be07
[   17.940695][    C3] R13: ffffc900009e76d8 R14: ffffffff9b72be02 R15: ffffc900009e7f58
[ 17.940698][ 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) 
[ 17.940704][ C3] unwind_next_frame (arch/x86/kernel/unwind_orc.c:643) 
[ 17.940708][ C3] ? entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:130) 
[ 17.940712][ C3] ? __pfx_unwind_next_frame (arch/x86/kernel/unwind_orc.c:469) 
[ 17.940717][ C3] ? entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:130) 
[ 17.940719][ C3] ? kernel_text_address (kernel/extable.c:99) 
[ 17.940723][ C3] ? __pfx_stack_trace_consume_entry (kernel/stacktrace.c:83) 
[ 17.940727][ C3] arch_stack_walk (arch/x86/kernel/stacktrace.c:24) 
[ 17.940733][ C3] stack_trace_save (kernel/stacktrace.c:123) 
[ 17.940736][ C3] ? __pfx_stack_trace_save (kernel/stacktrace.c:114) 
[ 17.940740][ C3] ? unwind_get_return_address (arch/x86/kernel/unwind_orc.c:369 arch/x86/kernel/unwind_orc.c:364) 
[ 17.940743][ C3] ? __pfx_stack_trace_consume_entry (kernel/stacktrace.c:83) 
[ 17.940746][ C3] ? arch_stack_walk (arch/x86/kernel/stacktrace.c:26) 
[ 17.940750][ C3] kasan_save_stack (mm/kasan/common.c:48) 
[ 17.940753][ C3] ? kasan_save_stack (mm/kasan/common.c:48) 
[ 17.940756][ C3] ? kasan_save_track (./arch/x86/include/asm/current.h:25 mm/kasan/common.c:60 mm/kasan/common.c:69) 
[ 17.940758][ C3] ? __kasan_kmalloc (mm/kasan/common.c:398) 
[ 17.940761][ C3] ? kmem_cache_free (mm/slub.c:2333 mm/slub.c:4642 mm/slub.c:4744) 
[ 17.940764][ C3] ? __put_anon_vma (mm/rmap.c:2757) 
[ 17.940769][ C3] ? unlink_anon_vmas (./include/linux/rmap.h:117 mm/rmap.c:444) 
[ 17.940772][ C3] ? free_pgtables (mm/memory.c:392) 
[ 17.940776][ C3] ? exit_mmap (mm/mmap.c:1297) 
[ 17.940779][ C3] ? mmput (kernel/fork.c:1447 kernel/fork.c:1382 kernel/fork.c:1402) 
[ 17.940783][ C3] ? exit_mm (kernel/exit.c:590) 
[ 17.940786][ C3] ? do_exit (kernel/exit.c:943) 
[ 17.940789][ C3] ? do_group_exit (kernel/exit.c:1083) 
[ 17.940791][ C3] ? __x64_sys_exit_group (kernel/exit.c:1111) 
[ 17.940794][ C3] ? x64_sys_call (arch/x86/entry/syscall_64.c:37) 
[ 17.940799][ C3] ? do_syscall_64 (arch/x86/entry/syscall_64.c:63 arch/x86/entry/syscall_64.c:94) 
[ 17.940802][ C3] ? entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:130) 
[ 17.940804][ C3] ? stack_depot_save_flags (lib/stackdepot.c:552 lib/stackdepot.c:619) 
[ 17.940809][ 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) 
[ 17.940813][ C3] ? __pfx_do_raw_spin_lock (kernel/locking/spinlock_debug.c:114) 
[ 17.940815][ C3] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:736) 
[ 17.940820][ C3] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:736) 
[ 17.940823][ C3] ? trace_irq_enable.constprop.0 (./include/trace/events/preemptirq.h:40) 
[ 17.940826][ C3] ? _raw_spin_unlock_irqrestore (./arch/x86/include/asm/preempt.h:104 ./include/linux/spinlock_api_smp.h:152 kernel/locking/spinlock.c:194) 
[ 17.940831][ C3] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:736) 
[ 17.940834][ C3] ? trace_kmalloc (./include/trace/events/kmem.h:54 (discriminator 21)) 
[ 17.940837][ C3] ? __kmalloc_cache_noprof (mm/slub.c:4360) 
[ 17.940841][ C3] kasan_save_track (./arch/x86/include/asm/current.h:25 mm/kasan/common.c:60 mm/kasan/common.c:69) 
[ 17.940844][ C3] __kasan_kmalloc (mm/kasan/common.c:398) 
[ 17.940848][ C3] kmem_cache_free (mm/slub.c:2333 mm/slub.c:4642 mm/slub.c:4744) 
[ 17.940852][ C3] ? __put_anon_vma (mm/rmap.c:2757) 
[ 17.940856][ C3] __put_anon_vma (mm/rmap.c:2757) 
[ 17.940859][ C3] unlink_anon_vmas (./include/linux/rmap.h:117 mm/rmap.c:444) 
[ 17.940863][ C3] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:736) 
[ 17.940867][ C3] free_pgtables (mm/memory.c:392) 
[ 17.940873][ C3] ? __pfx_free_pgtables (mm/memory.c:349) 
[ 17.940876][ C3] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5829) 
[ 17.940878][ C3] ? exit_mmap (./include/linux/seqlock.h:431 ./include/linux/mmap_lock.h:82 ./include/linux/mmap_lock.h:129 mm/mmap.c:1292) 
[ 17.940882][ C3] ? down_write (./arch/x86/include/asm/preempt.h:104 kernel/locking/rwsem.c:1307 kernel/locking/rwsem.c:1313 kernel/locking/rwsem.c:1578) 
[ 17.940884][ C3] ? __pfx_down_write (kernel/locking/rwsem.c:1575) 
[ 17.940887][ C3] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:736) 
[ 17.940891][ C3] ? trace_lock_release (./include/trace/events/lock.h:69 (discriminator 21)) 
[ 17.940896][ C3] exit_mmap (mm/mmap.c:1297) 
[ 17.940899][ C3] ? __pfx_exit_mmap (mm/mmap.c:1259) 
[ 17.940902][ C3] ? __mutex_lock (./arch/x86/include/asm/preempt.h:104 kernel/locking/mutex.c:727 kernel/locking/mutex.c:746) 
[ 17.940906][ C3] ? lock_release (kernel/locking/lockdep.c:118 kernel/locking/lockdep.c:5879) 
[ 17.940908][ C3] ? __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) 
[ 17.940916][ C3] mmput (kernel/fork.c:1447 kernel/fork.c:1382 kernel/fork.c:1402) 
[ 17.940920][ C3] exit_mm (kernel/exit.c:590) 
[ 17.940923][ C3] do_exit (kernel/exit.c:943) 
[ 17.940927][ C3] do_group_exit (kernel/exit.c:1083) 
[ 17.940931][ C3] __x64_sys_exit_group (kernel/exit.c:1111) 
[ 17.940934][ C3] x64_sys_call (arch/x86/entry/syscall_64.c:37) 
[ 17.940937][ C3] do_syscall_64 (arch/x86/entry/syscall_64.c:63 arch/x86/entry/syscall_64.c:94) 
[ 17.940940][ C3] entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:130) 
[   17.940942][    C3] RIP: 0033:0x7fd53167fabd
[ 17.940945][ C3] Code: Unable to access opcode bytes at 0x7fd53167fa93.

Code starting with the faulting instruction
===========================================
[   17.940947][    C3] RSP: 002b:00007fff3d16b388 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7
[   17.940949][    C3] RAX: ffffffffffffffda RBX: 00007fd53175c9c0 RCX: 00007fd53167fabd
[   17.940951][    C3] RDX: 00000000000000e7 RSI: ffffffffffffff80 RDI: 0000000000000000
[   17.940953][    C3] RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000030
[   17.940954][    C3] R10: 00007fff3d16b210 R11: 0000000000000246 R12: 00007fd53175c9c0


Finger prints:
mark_lock_irq:mark_lock:mark_usage:__lock_acquire:_raw_spin_lock
handle_softirqs:dump_stack_lvl:__might_resched:down_write:simple_recursive_removal
schedule_preempt_disabled:dump_stack_lvl:__might_resched:down_write:simple_recursive_removal