======================================
| [   16.138013][    C2] 1 lock held by ksoftirqd/2/27:
| [ 16.138200][ C2] #0: ffffffffaeb774c0 (rcu_callback){....}-{0:0}, at: rcu_do_batch (./include/linux/rcupdate.h:331 kernel/rcu/tree.c:2570) 
| [   16.138528][    C2]
| [   16.138528][    C2] stack backtrace:
[   16.138759][    C2] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[   16.138762][    C2] Call Trace:
[   16.138764][    C2]  <TASK>
[ 16.138766][ C2] dump_stack_lvl (lib/dump_stack.c:123) 
[ 16.138772][ C2] print_usage_bug.part.0 (kernel/locking/lockdep.c:4048) 
[ 16.138778][ C2] mark_lock_irq (kernel/locking/lockdep.c:4013 kernel/locking/lockdep.c:4059 kernel/locking/lockdep.c:4270) 
[ 16.138783][ C2] ? __pfx_unwind_next_frame (arch/x86/kernel/unwind_orc.c:469) 
[ 16.138787][ C2] ? save_trace (kernel/locking/lockdep.c:595) 
[ 16.138793][ C2] mark_lock (kernel/locking/lockdep.c:4756) 
[ 16.138797][ C2] mark_usage (kernel/locking/lockdep.c:4645) 
[ 16.138800][ C2] __lock_acquire (kernel/locking/lockdep.c:5194) 
[ 16.138803][ C2] ? __lock_acquire (kernel/locking/lockdep.c:5240) 
[ 16.138807][ C2] lock_acquire.part.0 (kernel/locking/lockdep.c:473 kernel/locking/lockdep.c:5873) 
[ 16.138810][ C2] ? simple_pin_fs (fs/libfs.c:1067) 
[ 16.138815][ C2] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:745) 
[ 16.138819][ C2] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5834) 
[ 16.138822][ C2] ? simple_pin_fs (fs/libfs.c:1067) 
[ 16.138826][ C2] _raw_spin_lock (./include/linux/spinlock_api_smp.h:134 kernel/locking/spinlock.c:154) 
[ 16.138830][ C2] ? simple_pin_fs (fs/libfs.c:1067) 
[ 16.138833][ C2] simple_pin_fs (fs/libfs.c:1067) 
[ 16.138837][ C2] debugfs_remove (fs/debugfs/inode.c:805 fs/debugfs/inode.c:799) 
[ 16.138841][ C2] ref_tracker_dir_exit (lib/ref_tracker.c:411 lib/ref_tracker.c:195) 
[ 16.138847][ C2] ? __pfx_ref_tracker_free (lib/ref_tracker.c:253) 
[ 16.138850][ 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:2376) 
[ 16.138856][ C2] ? rcu_do_batch (kernel/rcu/tree.c:2576) 
[ 16.138858][ C2] ? __pfx_ref_tracker_dir_exit (lib/ref_tracker.c:189) 
[ 16.138862][ C2] ? smpboot_thread_fn (kernel/smpboot.c:164 (discriminator 3)) 
[ 16.138866][ C2] ? kthread (kernel/kthread.c:464) 
[ 16.138869][ C2] ? ret_from_fork (arch/x86/kernel/process.c:148) 
[ 16.138871][ C2] ? ret_from_fork_asm (arch/x86/entry/entry_64.S:258) 
[ 16.138875][ C2] ? migrate_enable (./arch/x86/include/asm/preempt.h:104 ./include/linux/preempt.h:481 ./include/linux/preempt.h:481 kernel/sched/core.c:2427) 
[ 16.138880][ C2] ? __pfx_migrate_enable (kernel/sched/core.c:2402) 
[ 16.138885][ C2] __put_net (net/core/net_namespace.c:732) 
[ 16.138889][ C2] __sk_destruct (./include/net/net_namespace.h:288 ./include/net/net_namespace.h:390 net/core/sock.c:2376) 
[ 16.138893][ C2] ? rcu_do_batch (kernel/rcu/tree.c:2576) 
[ 16.138895][ C2] rcu_do_batch (kernel/rcu/tree.c:2576) 
[ 16.138898][ C2] ? lockdep_hardirqs_on (kernel/locking/lockdep.c:4475) 
[ 16.138902][ C2] ? __pfx_rcu_do_batch (kernel/rcu/tree.c:2500) 
[ 16.138905][ C2] ? __pfx_tmigr_handle_remote (kernel/time/timer_migration.c:1059) 
[ 16.138909][ C2] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:745) 
[ 16.138912][ C2] ? note_gp_changes (kernel/rcu/tree.c:1326 (discriminator 1)) 
[ 16.138915][ C2] ? lockdep_hardirqs_on (kernel/locking/lockdep.c:4475) 
[ 16.138919][ C2] rcu_core (kernel/rcu/tree.c:2834) 
[ 16.138923][ C2] handle_softirqs (kernel/softirq.c:579) 
[ 16.138927][ C2] ? __pfx_run_ksoftirqd (kernel/softirq.c:961) 
[ 16.138931][ C2] run_ksoftirqd (kernel/softirq.c:436 kernel/softirq.c:969 kernel/softirq.c:960) 
[ 16.138934][ C2] smpboot_thread_fn (kernel/smpboot.c:164 (discriminator 3)) 
[ 16.138937][ C2] ? __pfx_smpboot_thread_fn (kernel/smpboot.c:107) 
[ 16.138941][ C2] kthread (kernel/kthread.c:464) 
[ 16.138944][ C2] ? __pfx_kthread (kernel/kthread.c:413) 
[ 16.138947][ C2] ? ret_from_fork (arch/x86/kernel/process.c:147) 
[ 16.138949][ C2] ? __lock_release (kernel/locking/lockdep.c:5539) 
[ 16.138953][ C2] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:745) 
[ 16.138956][ C2] ? __pfx_kthread (kernel/kthread.c:413) 
[ 16.138961][ C2] ret_from_fork (arch/x86/kernel/process.c:148) 
[ 16.138966][ C2] ? __pfx_kthread (kernel/kthread.c:413) 
[ 16.138970][ C2] ret_from_fork_asm (arch/x86/entry/entry_64.S:258) 
| [   16.150862][    C2] RCU nest depth: 0, expected: 0
| [   16.151065][    C2] INFO: lockdep is turned off.
| [   16.151246][    C2] Preemption disabled at:
| [ 16.151248][ C2] handle_softirqs (kernel/softirq.c:553) 
[   16.151634][    C2] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[   16.151636][    C2] Call Trace:
[   16.151637][    C2]  <TASK>
[ 16.151639][ C2] dump_stack_lvl (lib/dump_stack.c:123) 
[ 16.151646][ C2] __might_resched (kernel/sched/core.c:8796) 
[ 16.151653][ C2] down_write (./include/linux/kernel.h:73 kernel/locking/rwsem.c:1576) 
[ 16.151657][ C2] ? __pfx_down_write (kernel/locking/rwsem.c:1575) 
[ 16.151660][ C2] ? simple_recursive_removal (fs/libfs.c:614) 
[ 16.151664][ C2] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:745) 
[ 16.151668][ C2] ? do_raw_spin_unlock (./arch/x86/include/asm/atomic.h:23 ./include/linux/atomic/atomic-arch-fallback.h:457 ./include/linux/atomic/atomic-instrumented.h:33 ./include/asm-generic/qspinlock.h:57 kernel/locking/spinlock_debug.c:101 kernel/locking/spinlock_debug.c:141) 
[ 16.151673][ C2] simple_recursive_removal (./include/linux/dcache.h:409 ./include/linux/dcache.h:424 ./include/linux/dcache.h:434 fs/libfs.c:617) 
[ 16.151676][ C2] ? do_raw_spin_unlock (./arch/x86/include/asm/atomic.h:23 ./include/linux/atomic/atomic-arch-fallback.h:457 ./include/linux/atomic/atomic-instrumented.h:33 ./include/asm-generic/qspinlock.h:57 kernel/locking/spinlock_debug.c:101 kernel/locking/spinlock_debug.c:141) 
[ 16.151679][ C2] ? __pfx_remove_one (fs/debugfs/inode.c:780) 
[ 16.151685][ C2] debugfs_remove (fs/debugfs/inode.c:806 fs/debugfs/inode.c:799) 
[ 16.151688][ C2] ref_tracker_dir_exit (lib/ref_tracker.c:411 lib/ref_tracker.c:195) 
[ 16.151693][ C2] ? __pfx_ref_tracker_free (lib/ref_tracker.c:253) 
[ 16.151697][ 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:2376) 
[ 16.151702][ C2] ? rcu_do_batch (kernel/rcu/tree.c:2576) 
[ 16.151705][ C2] ? __pfx_ref_tracker_dir_exit (lib/ref_tracker.c:189) 
[ 16.151708][ C2] ? smpboot_thread_fn (kernel/smpboot.c:164 (discriminator 3)) 
[ 16.151712][ C2] ? kthread (kernel/kthread.c:464) 
[ 16.151714][ C2] ? ret_from_fork (arch/x86/kernel/process.c:148) 
[ 16.151718][ C2] ? ret_from_fork_asm (arch/x86/entry/entry_64.S:258) 
[ 16.151723][ C2] ? migrate_enable (./arch/x86/include/asm/preempt.h:104 ./include/linux/preempt.h:481 ./include/linux/preempt.h:481 kernel/sched/core.c:2427) 
[ 16.151726][ C2] ? __pfx_migrate_enable (kernel/sched/core.c:2402) 
[ 16.151732][ C2] __put_net (net/core/net_namespace.c:732) 
[ 16.151735][ C2] __sk_destruct (./include/net/net_namespace.h:288 ./include/net/net_namespace.h:390 net/core/sock.c:2376) 
[ 16.151739][ C2] ? rcu_do_batch (kernel/rcu/tree.c:2576) 
[ 16.151742][ C2] rcu_do_batch (kernel/rcu/tree.c:2576) 
[ 16.151745][ C2] ? lockdep_hardirqs_on (kernel/locking/lockdep.c:4475) 
[ 16.151749][ C2] ? __pfx_rcu_do_batch (kernel/rcu/tree.c:2500) 
[ 16.151751][ C2] ? __pfx_tmigr_handle_remote (kernel/time/timer_migration.c:1059) 
[ 16.151755][ C2] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:745) 
[ 16.151758][ C2] ? note_gp_changes (kernel/rcu/tree.c:1326 (discriminator 1)) 
[ 16.151761][ C2] ? lockdep_hardirqs_on (kernel/locking/lockdep.c:4475) 
[ 16.151765][ C2] rcu_core (kernel/rcu/tree.c:2834) 
[ 16.151769][ C2] handle_softirqs (kernel/softirq.c:579) 
[ 16.151773][ C2] ? __pfx_run_ksoftirqd (kernel/softirq.c:961) 
[ 16.151777][ C2] run_ksoftirqd (kernel/softirq.c:436 kernel/softirq.c:969 kernel/softirq.c:960) 
[ 16.151779][ C2] smpboot_thread_fn (kernel/smpboot.c:164 (discriminator 3)) 
[ 16.151783][ C2] ? __pfx_smpboot_thread_fn (kernel/smpboot.c:107) 
[ 16.151787][ C2] kthread (kernel/kthread.c:464) 
[ 16.151790][ C2] ? __pfx_kthread (kernel/kthread.c:413) 
[ 16.151792][ C2] ? ret_from_fork (arch/x86/kernel/process.c:147) 
[ 16.151795][ C2] ? __lock_release (kernel/locking/lockdep.c:5539) 
[ 16.151798][ C2] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:745) 
[ 16.151801][ C2] ? __pfx_kthread (kernel/kthread.c:413) 
[ 16.151804][ C2] ret_from_fork (arch/x86/kernel/process.c:148) 
[ 16.151807][ C2] ? __pfx_kthread (kernel/kthread.c:413) 
[ 16.151810][ C2] ret_from_fork_asm (arch/x86/entry/entry_64.S:258) 
| [   18.587598][    C2] INFO: lockdep is turned off.
| [   18.587813][    C2] Preemption disabled at:
| [ 18.587815][ C2] 0x0 
| [   18.588220][    C2] Tainted: [W]=WARN
[   18.588222][    C2] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[   18.588223][    C2] Call Trace:
[   18.588225][    C2]  <IRQ>
[ 18.588227][ C2] dump_stack_lvl (lib/dump_stack.c:123) 
[ 18.588236][ C2] __might_resched (kernel/sched/core.c:8796) 
[ 18.588243][ C2] down_write (./include/linux/kernel.h:73 kernel/locking/rwsem.c:1576) 
[ 18.588248][ C2] ? __pfx_down_write (kernel/locking/rwsem.c:1575) 
[ 18.588251][ C2] ? simple_recursive_removal (fs/libfs.c:614) 
[ 18.588256][ C2] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:745) 
[ 18.588261][ 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) 
[ 18.588267][ C2] simple_recursive_removal (./include/linux/dcache.h:409 ./include/linux/dcache.h:424 ./include/linux/dcache.h:434 fs/libfs.c:617) 
[ 18.588269][ 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) 
[ 18.588273][ C2] ? __pfx_remove_one (fs/debugfs/inode.c:780) 
[ 18.588278][ C2] debugfs_remove (fs/debugfs/inode.c:806 fs/debugfs/inode.c:799) 
[ 18.588281][ C2] ref_tracker_dir_exit (lib/ref_tracker.c:411 lib/ref_tracker.c:195) 
[ 18.588287][ C2] ? __pfx_ref_tracker_free (lib/ref_tracker.c:253) 
[ 18.588290][ 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:2376) 
[ 18.588295][ C2] ? rcu_do_batch (kernel/rcu/tree.c:2576) 
[ 18.588299][ C2] ? __pfx_ref_tracker_dir_exit (lib/ref_tracker.c:189) 
[ 18.588302][ C2] ? irq_exit_rcu (kernel/softirq.c:698) 
[ 18.588307][ C2] ? sysvec_apic_timer_interrupt (arch/x86/kernel/apic/apic.c:1050 arch/x86/kernel/apic/apic.c:1050) 
[ 18.588312][ C2] ? asm_sysvec_apic_timer_interrupt (./arch/x86/include/asm/idtentry.h:702) 
[ 18.588316][ C2] ? _raw_spin_unlock_irqrestore (./include/linux/spinlock_api_smp.h:152 kernel/locking/spinlock.c:194) 
[ 18.588320][ C2] ? __create_object (mm/kmemleak.c:776) 
[ 18.588325][ C2] ? __kmalloc_cache_noprof (./include/linux/kmemleak.h:43 mm/slub.c:4151 mm/slub.c:4196 mm/slub.c:4353) 
[ 18.588329][ C2] ? kmem_cache_free (mm/slub.c:2333 mm/slub.c:4642 mm/slub.c:4744) 
[ 18.588333][ C2] ? exit_mmap (mm/mmap.c:1311) 
[ 18.588338][ C2] ? mmput (kernel/fork.c:1449 kernel/fork.c:1383 kernel/fork.c:1404) 
[ 18.588341][ C2] ? exit_mm (kernel/exit.c:596) 
[ 18.588345][ C2] ? do_exit (kernel/exit.c:950) 
[ 18.588348][ C2] ? bpf_sk_storage_free (./include/linux/rcupdate.h:341 ./include/linux/rcupdate.h:871 net/core/bpf_sk_storage.c:61) 
[ 18.588353][ C2] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:745) 
[ 18.588357][ C2] __put_net (net/core/net_namespace.c:732) 
[ 18.588361][ C2] __sk_destruct (./include/net/net_namespace.h:288 ./include/net/net_namespace.h:390 net/core/sock.c:2376) 
[ 18.588365][ C2] ? rcu_do_batch (kernel/rcu/tree.c:2576) 
[ 18.588368][ C2] rcu_do_batch (kernel/rcu/tree.c:2576) 
[ 18.588372][ C2] ? __pfx_rcu_do_batch (kernel/rcu/tree.c:2500) 
[ 18.588376][ C2] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:745) 
[ 18.588379][ C2] ? trace_irq_enable.constprop.0 (./include/trace/events/preemptirq.h:40) 
[ 18.588386][ C2] rcu_core (kernel/rcu/tree.c:2834) 
[ 18.588390][ C2] handle_softirqs (kernel/softirq.c:579) 
[ 18.588396][ C2] __irq_exit_rcu (kernel/softirq.c:614 kernel/softirq.c:453 kernel/softirq.c:680) 
[ 18.588398][ C2] irq_exit_rcu (kernel/softirq.c:698) 
[ 18.588401][ C2] sysvec_apic_timer_interrupt (arch/x86/kernel/apic/apic.c:1050 arch/x86/kernel/apic/apic.c:1050) 
[   18.588405][    C2]  </IRQ>
[   18.588406][    C2]  <TASK>
[ 18.588407][ C2] asm_sysvec_apic_timer_interrupt (./arch/x86/include/asm/idtentry.h:702) 
[ 18.588410][ C2] RIP: 0010:_raw_spin_unlock_irqrestore (./include/linux/spinlock_api_smp.h:152 kernel/locking/spinlock.c:194) 
[ 18.588414][ C2] Code: 74 24 10 e8 c1 2e 83 fd 48 89 ef e8 79 81 83 fd 81 e3 00 02 00 00 75 29 9c 58 f6 c4 02 75 35 48 85 db 74 01 fb bf 01 00 00 00 <e8> fa 7e 77 fd 65 8b 05 13 7d 97 02 85 c0 74 0e 5b 5d c3 cc cc cc
All code
========
   0:	74 24                	je     0x26
   2:	10 e8                	adc    %ch,%al
   4:	c1 2e 83             	shrl   $0x83,(%rsi)
   7:	fd                   	std
   8:	48 89 ef             	mov    %rbp,%rdi
   b:	e8 79 81 83 fd       	call   0xfffffffffd838189
  10:	81 e3 00 02 00 00    	and    $0x200,%ebx
  16:	75 29                	jne    0x41
  18:	9c                   	pushf
  19:	58                   	pop    %rax
  1a:	f6 c4 02             	test   $0x2,%ah
  1d:	75 35                	jne    0x54
  1f:	48 85 db             	test   %rbx,%rbx
  22:	74 01                	je     0x25
  24:	fb                   	sti
  25:	bf 01 00 00 00       	mov    $0x1,%edi
  2a:*	e8 fa 7e 77 fd       	call   0xfffffffffd777f29		<-- trapping instruction
  2f:	65 8b 05 13 7d 97 02 	mov    %gs:0x2977d13(%rip),%eax        # 0x2977d49
  36:	85 c0                	test   %eax,%eax
  38:	74 0e                	je     0x48
  3a:	5b                   	pop    %rbx
  3b:	5d                   	pop    %rbp
  3c:	c3                   	ret
  3d:	cc                   	int3
  3e:	cc                   	int3
  3f:	cc                   	int3

Code starting with the faulting instruction
===========================================
   0:	e8 fa 7e 77 fd       	call   0xfffffffffd777eff
   5:	65 8b 05 13 7d 97 02 	mov    %gs:0x2977d13(%rip),%eax        # 0x2977d1f
   c:	85 c0                	test   %eax,%eax
   e:	74 0e                	je     0x1e
  10:	5b                   	pop    %rbx
  11:	5d                   	pop    %rbp
  12:	c3                   	ret
  13:	cc                   	int3
  14:	cc                   	int3
  15:	cc                   	int3
[   18.588417][    C2] RSP: 0018:ffffc90000ab7b90 EFLAGS: 00000206
[   18.588421][    C2] RAX: 0000000000000046 RBX: 0000000000000200 RCX: ffffffffab643b9f
[   18.588422][    C2] RDX: 0000000000000000 RSI: ffffffffade53b60 RDI: 0000000000000001
[   18.588424][    C2] RBP: ffffffffaed89020 R08: 0000000000000000 R09: 0000000000000000
[   18.588426][    C2] R10: ffffffffaf5e68d7 R11: ffffc90000ab7a00 R12: ffff888004e6ee60
[   18.588427][    C2] R13: 0000000000000020 R14: 0000000000000001 R15: 0000000000000286
[ 18.588431][ C2] ? trace_irq_enable.constprop.0 (./arch/x86/include/asm/bitops.h:227 ./arch/x86/include/asm/bitops.h:239 ./include/asm-generic/bitops/instrumented-non-atomic.h:142 ./include/linux/cpumask.h:654 ./include/linux/cpumask.h:1210 ./include/trace/events/preemptirq.h:40) 
[ 18.588437][ C2] __create_object (mm/kmemleak.c:776) 
[ 18.588441][ C2] __kmalloc_cache_noprof (./include/linux/kmemleak.h:43 mm/slub.c:4151 mm/slub.c:4196 mm/slub.c:4353) 
[ 18.588446][ C2] kmem_cache_free (mm/slub.c:2333 mm/slub.c:4642 mm/slub.c:4744) 
[ 18.588449][ C2] ? exit_mmap (mm/mmap.c:1311) 
[ 18.588454][ C2] exit_mmap (mm/mmap.c:1311) 
[ 18.588458][ C2] ? __pfx_exit_mmap (mm/mmap.c:1259) 
[ 18.588462][ C2] ? __mutex_lock (./arch/x86/include/asm/preempt.h:104 kernel/locking/mutex.c:727 kernel/locking/mutex.c:746) 
[ 18.588466][ C2] ? lock_release (kernel/locking/lockdep.c:118 kernel/locking/lockdep.c:5884) 
[ 18.588469][ 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) 
[ 18.588478][ C2] mmput (kernel/fork.c:1449 kernel/fork.c:1383 kernel/fork.c:1404) 
[ 18.588483][ C2] exit_mm (kernel/exit.c:596) 
[ 18.588487][ C2] do_exit (kernel/exit.c:950) 
[ 18.588491][ C2] do_group_exit (kernel/exit.c:1089) 
[ 18.588495][ C2] __x64_sys_exit_group (kernel/exit.c:1117) 
[ 18.588499][ C2] x64_sys_call (arch/x86/entry/syscall_64.c:37) 
[ 18.588505][ C2] do_syscall_64 (arch/x86/entry/syscall_64.c:63 arch/x86/entry/syscall_64.c:94) 
[ 18.588508][ C2] entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:130) 
[   18.588511][    C2] RIP: 0033:0x7f61bc9caabd
[ 18.588513][ C2] Code: Unable to access opcode bytes at 0x7f61bc9caa93.

Code starting with the faulting instruction
===========================================
[   18.588514][    C2] RSP: 002b:00007ffe3260d8f8 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7
[   18.588517][    C2] RAX: ffffffffffffffda RBX: 00007f61bcaa79c0 RCX: 00007f61bc9caabd
[   18.588519][    C2] RDX: 00000000000000e7 RSI: ffffffffffffff80 RDI: 0000000000000000
[   18.588520][    C2] RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000020
[   18.588522][    C2] R10: 00007ffe3260d7a0 R11: 0000000000000246 R12: 00007f61bcaa79c0


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