======================================
| [   17.000334][    C2] 1 lock held by swapper/2/0:
| [ 17.000529][ C2] #0: ffffffffb03774c0 (rcu_callback){....}-{0:0}, at: rcu_do_batch (./include/linux/rcupdate.h:331 kernel/rcu/tree.c:2570) 
| [   17.000868][    C2]
| [   17.000868][    C2] stack backtrace:
[   17.001111][    C2] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[   17.001113][    C2] Call Trace:
[   17.001116][    C2]  <IRQ>
[ 17.001118][ C2] dump_stack_lvl (lib/dump_stack.c:123) 
[ 17.001127][ C2] print_usage_bug.part.0 (kernel/locking/lockdep.c:4048) 
[ 17.001131][ C2] mark_lock_irq (kernel/locking/lockdep.c:4013 kernel/locking/lockdep.c:4059 kernel/locking/lockdep.c:4270) 
[ 17.001136][ C2] ? __pfx_unwind_next_frame (arch/x86/kernel/unwind_orc.c:469) 
[ 17.001142][ C2] ? save_trace (kernel/locking/lockdep.c:595) 
[ 17.001149][ C2] mark_lock (kernel/locking/lockdep.c:4756) 
[ 17.001153][ C2] mark_usage (kernel/locking/lockdep.c:4645) 
[ 17.001156][ C2] __lock_acquire (kernel/locking/lockdep.c:5194) 
[ 17.001160][ C2] ? __lock_acquire (kernel/locking/lockdep.c:5240) 
[ 17.001164][ C2] lock_acquire.part.0 (kernel/locking/lockdep.c:473 kernel/locking/lockdep.c:5873) 
[ 17.001167][ C2] ? simple_pin_fs (fs/libfs.c:1067) 
[ 17.001171][ C2] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:745) 
[ 17.001177][ C2] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5834) 
[ 17.001179][ C2] ? simple_pin_fs (fs/libfs.c:1067) 
[ 17.001184][ C2] _raw_spin_lock (./include/linux/spinlock_api_smp.h:134 kernel/locking/spinlock.c:154) 
[ 17.001187][ C2] ? simple_pin_fs (fs/libfs.c:1067) 
[ 17.001191][ C2] simple_pin_fs (fs/libfs.c:1067) 
[ 17.001195][ C2] debugfs_remove (fs/debugfs/inode.c:805 fs/debugfs/inode.c:799) 
[ 17.001198][ C2] ref_tracker_dir_exit (lib/ref_tracker.c:411 lib/ref_tracker.c:195) 
[ 17.001206][ C2] ? __pfx_ref_tracker_free (lib/ref_tracker.c:253) 
[ 17.001209][ 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) 
[ 17.001217][ C2] ? rcu_do_batch (kernel/rcu/tree.c:2576) 
[ 17.001219][ C2] ? __pfx_ref_tracker_dir_exit (lib/ref_tracker.c:189) 
[ 17.001223][ C2] ? irq_exit_rcu (kernel/softirq.c:698) 
[ 17.001226][ C2] ? sysvec_apic_timer_interrupt (arch/x86/kernel/apic/apic.c:1050 arch/x86/kernel/apic/apic.c:1050) 
[ 17.001233][ C2] ? asm_sysvec_apic_timer_interrupt (./arch/x86/include/asm/idtentry.h:702) 
[ 17.001237][ C2] ? pv_native_safe_halt (arch/x86/kernel/paravirt.c:82) 
[ 17.001240][ C2] ? default_idle (./arch/x86/include/asm/paravirt.h:107 arch/x86/kernel/process.c:743) 
[ 17.001243][ C2] ? default_idle_call (./include/linux/cpuidle.h:143 kernel/sched/idle.c:118) 
[ 17.001246][ C2] ? cpuidle_idle_call (kernel/sched/idle.c:186) 
[ 17.001250][ C2] ? do_idle (kernel/sched/idle.c:325) 
[ 17.001252][ C2] ? cpu_startup_entry (kernel/sched/idle.c:422 (discriminator 1)) 
[ 17.001255][ C2] ? start_secondary (arch/x86/kernel/smpboot.c:203 arch/x86/kernel/smpboot.c:283) 
[ 17.001259][ C2] ? common_startup_64 (arch/x86/kernel/head_64.S:419) 
[ 17.001268][ C2] __put_net (net/core/net_namespace.c:732) 
[ 17.001274][ C2] __sk_destruct (./include/net/net_namespace.h:288 ./include/net/net_namespace.h:390 net/core/sock.c:2376) 
[ 17.001278][ C2] ? rcu_do_batch (kernel/rcu/tree.c:2576) 
[ 17.001281][ C2] rcu_do_batch (kernel/rcu/tree.c:2576) 
[ 17.001284][ C2] ? find_held_lock (kernel/locking/lockdep.c:5353) 
[ 17.001289][ C2] ? __pfx_rcu_do_batch (kernel/rcu/tree.c:2500) 
[ 17.001292][ C2] ? _raw_spin_unlock_irqrestore (./include/linux/spinlock_api_smp.h:151 kernel/locking/spinlock.c:194) 
[ 17.001296][ C2] ? lockdep_hardirqs_on (kernel/locking/lockdep.c:4475) 
[ 17.001299][ C2] ? _raw_spin_unlock_irqrestore (./arch/x86/include/asm/preempt.h:104 ./include/linux/spinlock_api_smp.h:152 kernel/locking/spinlock.c:194) 
[ 17.001304][ C2] rcu_core (kernel/rcu/tree.c:2834) 
[ 17.001310][ C2] handle_softirqs (kernel/softirq.c:579) 
[ 17.001315][ C2] __irq_exit_rcu (kernel/softirq.c:614 kernel/softirq.c:453 kernel/softirq.c:680) 
[ 17.001319][ C2] irq_exit_rcu (kernel/softirq.c:698) 
[ 17.001322][ C2] sysvec_apic_timer_interrupt (arch/x86/kernel/apic/apic.c:1050 arch/x86/kernel/apic/apic.c:1050) 
[   17.001325][    C2]  </IRQ>
[   17.001327][    C2]  <TASK>
[ 17.001329][ C2] asm_sysvec_apic_timer_interrupt (./arch/x86/include/asm/idtentry.h:702) 
[ 17.001331][ C2] RIP: 0010:pv_native_safe_halt (arch/x86/kernel/paravirt.c:82) 
[ 17.001336][ C2] Code: a2 b5 00 c3 cc cc cc cc 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 83 47 10 00 fb f4 <e9> fc 54 02 00 66 2e 0f 1f 84 00 00 00 00 00 66 90 90 90 90 90 90
All code
========
   0:	a2 b5 00 c3 cc cc cc 	movabs %al,0xfccccccccc300b5
   7:	cc 0f 
   9:	1f                   	(bad)
   a:	00 90 90 90 90 90    	add    %dl,-0x6f6f6f70(%rax)
  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 83 47 10 00 	verw   0x104783(%rip)        # 0x1047ab
  28:	fb                   	sti
  29:	f4                   	hlt
  2a:*	e9 fc 54 02 00       	jmp    0x2552b		<-- trapping instruction
  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:	e9 fc 54 02 00       	jmp    0x25501
   5:	66 2e 0f 1f 84 00 00 	cs nopw 0x0(%rax,%rax,1)
   c:	00 00 00 
   f:	66 90                	xchg   %ax,%ax
  11:	90                   	nop
  12:	90                   	nop
  13:	90                   	nop
  14:	90                   	nop
  15:	90                   	nop
[   17.001338][    C2] RSP: 0018:ffffc90000147de8 EFLAGS: 00000242
[   17.001342][    C2] RAX: 000000000004694f RBX: 1ffff92000028fc1 RCX: ffffffffaf38f5d9
[   17.001344][    C2] RDX: 0000000000000000 RSI: ffffffffafe8f4e4 RDI: ffffffffaf653be0
[   17.001346][    C2] RBP: 0000000000000000 R08: 0000000000000001 R09: ffffed1006c266fa
[   17.001347][    C2] R10: ffff8880361337d3 R11: ffffffffb0011288 R12: 0000000000000000
[   17.001349][    C2] R13: ffff888001bf2300 R14: dffffc0000000000 R15: 0000000000000000
[ 17.001353][ C2] ? ct_kernel_exit.constprop.0 (kernel/context_tracking.c:146) 
[ 17.001358][ C2] default_idle (./arch/x86/include/asm/paravirt.h:107 arch/x86/kernel/process.c:743) 
[ 17.001360][ C2] default_idle_call (./include/linux/cpuidle.h:143 kernel/sched/idle.c:118) 
[ 17.001363][ C2] cpuidle_idle_call (kernel/sched/idle.c:186) 
[ 17.001366][ C2] ? __pfx_cpuidle_idle_call (kernel/sched/idle.c:168) 
[ 17.001370][ C2] ? tsc_verify_tsc_adjust (arch/x86/kernel/tsc_sync.c:60) 
[ 17.001374][ C2] do_idle (kernel/sched/idle.c:325) 
[ 17.001378][ C2] cpu_startup_entry (kernel/sched/idle.c:422 (discriminator 1)) 
[ 17.001381][ C2] start_secondary (arch/x86/kernel/smpboot.c:203 arch/x86/kernel/smpboot.c:283) 
[ 17.001384][ C2] ? __pfx_start_secondary (arch/x86/kernel/smpboot.c:233) 
[ 17.001388][ C2] common_startup_64 (arch/x86/kernel/head_64.S:419) 
| [   17.017647][    C2] RCU nest depth: 0, expected: 0
| [   17.017857][    C2] INFO: lockdep is turned off.
| [   17.018154][    C2] Preemption disabled at:
| [ 17.018156][ C2] 0x0 
[   17.018502][    C2] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[   17.018505][    C2] Call Trace:
[   17.018507][    C2]  <IRQ>
[ 17.018509][ C2] dump_stack_lvl (lib/dump_stack.c:123) 
[ 17.018519][ C2] __might_resched (kernel/sched/core.c:8796) 
[ 17.018528][ C2] down_write (./include/linux/kernel.h:73 kernel/locking/rwsem.c:1576) 
[ 17.018533][ C2] ? __pfx_down_write (kernel/locking/rwsem.c:1575) 
[ 17.018536][ C2] ? simple_recursive_removal (fs/libfs.c:614) 
[ 17.018541][ C2] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:745) 
[ 17.018547][ 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) 
[ 17.018556][ C2] simple_recursive_removal (./include/linux/dcache.h:409 ./include/linux/dcache.h:424 ./include/linux/dcache.h:434 fs/libfs.c:617) 
[ 17.018559][ 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) 
[ 17.018563][ C2] ? __pfx_remove_one (fs/debugfs/inode.c:780) 
[ 17.018569][ C2] debugfs_remove (fs/debugfs/inode.c:806 fs/debugfs/inode.c:799) 
[ 17.018572][ C2] ref_tracker_dir_exit (lib/ref_tracker.c:411 lib/ref_tracker.c:195) 
[ 17.018579][ C2] ? __pfx_ref_tracker_free (lib/ref_tracker.c:253) 
[ 17.018583][ 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) 
[ 17.018589][ C2] ? rcu_do_batch (kernel/rcu/tree.c:2576) 
[ 17.018592][ C2] ? __pfx_ref_tracker_dir_exit (lib/ref_tracker.c:189) 
[ 17.018596][ C2] ? irq_exit_rcu (kernel/softirq.c:698) 
[ 17.018602][ C2] ? sysvec_apic_timer_interrupt (arch/x86/kernel/apic/apic.c:1050 arch/x86/kernel/apic/apic.c:1050) 
[ 17.018608][ C2] ? asm_sysvec_apic_timer_interrupt (./arch/x86/include/asm/idtentry.h:702) 
[ 17.018612][ C2] ? pv_native_safe_halt (arch/x86/kernel/paravirt.c:82) 
[ 17.018616][ C2] ? default_idle (./arch/x86/include/asm/paravirt.h:107 arch/x86/kernel/process.c:743) 
[ 17.018619][ C2] ? default_idle_call (./include/linux/cpuidle.h:143 kernel/sched/idle.c:118) 
[ 17.018621][ C2] ? cpuidle_idle_call (kernel/sched/idle.c:186) 
[ 17.018626][ C2] ? do_idle (kernel/sched/idle.c:325) 
[ 17.018628][ C2] ? cpu_startup_entry (kernel/sched/idle.c:422 (discriminator 1)) 
[ 17.018630][ C2] ? start_secondary (arch/x86/kernel/smpboot.c:203 arch/x86/kernel/smpboot.c:283) 
[ 17.018634][ C2] ? common_startup_64 (arch/x86/kernel/head_64.S:419) 
[ 17.018642][ C2] __put_net (net/core/net_namespace.c:732) 
[ 17.018647][ C2] __sk_destruct (./include/net/net_namespace.h:288 ./include/net/net_namespace.h:390 net/core/sock.c:2376) 
[ 17.018651][ C2] ? rcu_do_batch (kernel/rcu/tree.c:2576) 
[ 17.018653][ C2] rcu_do_batch (kernel/rcu/tree.c:2576) 
[ 17.018656][ C2] ? find_held_lock (kernel/locking/lockdep.c:5353) 
[ 17.018662][ C2] ? __pfx_rcu_do_batch (kernel/rcu/tree.c:2500) 
[ 17.018666][ C2] ? _raw_spin_unlock_irqrestore (./include/linux/spinlock_api_smp.h:151 kernel/locking/spinlock.c:194) 
[ 17.018671][ C2] ? lockdep_hardirqs_on (kernel/locking/lockdep.c:4475) 
[ 17.018674][ C2] ? _raw_spin_unlock_irqrestore (./arch/x86/include/asm/preempt.h:104 ./include/linux/spinlock_api_smp.h:152 kernel/locking/spinlock.c:194) 
[ 17.018679][ C2] rcu_core (kernel/rcu/tree.c:2834) 
[ 17.018684][ C2] handle_softirqs (kernel/softirq.c:579) 
[ 17.018690][ C2] __irq_exit_rcu (kernel/softirq.c:614 kernel/softirq.c:453 kernel/softirq.c:680) 
[ 17.018693][ C2] irq_exit_rcu (kernel/softirq.c:698) 
[ 17.018696][ C2] sysvec_apic_timer_interrupt (arch/x86/kernel/apic/apic.c:1050 arch/x86/kernel/apic/apic.c:1050) 
[   17.018700][    C2]  </IRQ>
[   17.018701][    C2]  <TASK>
[ 17.018702][ C2] asm_sysvec_apic_timer_interrupt (./arch/x86/include/asm/idtentry.h:702) 
[ 17.018705][ C2] RIP: 0010:pv_native_safe_halt (arch/x86/kernel/paravirt.c:82) 
[ 17.018709][ C2] Code: a2 b5 00 c3 cc cc cc cc 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 83 47 10 00 fb f4 <e9> fc 54 02 00 66 2e 0f 1f 84 00 00 00 00 00 66 90 90 90 90 90 90
All code
========
   0:	a2 b5 00 c3 cc cc cc 	movabs %al,0xfccccccccc300b5
   7:	cc 0f 
   9:	1f                   	(bad)
   a:	00 90 90 90 90 90    	add    %dl,-0x6f6f6f70(%rax)
  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 83 47 10 00 	verw   0x104783(%rip)        # 0x1047ab
  28:	fb                   	sti
  29:	f4                   	hlt
  2a:*	e9 fc 54 02 00       	jmp    0x2552b		<-- trapping instruction
  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:	e9 fc 54 02 00       	jmp    0x25501
   5:	66 2e 0f 1f 84 00 00 	cs nopw 0x0(%rax,%rax,1)
   c:	00 00 00 
   f:	66 90                	xchg   %ax,%ax
  11:	90                   	nop
  12:	90                   	nop
  13:	90                   	nop
  14:	90                   	nop
  15:	90                   	nop
[   17.018712][    C2] RSP: 0018:ffffc90000147de8 EFLAGS: 00000242
[   17.018716][    C2] RAX: 000000000004694f RBX: 1ffff92000028fc1 RCX: ffffffffaf38f5d9
[   17.018718][    C2] RDX: 0000000000000000 RSI: ffffffffafe8f4e4 RDI: ffffffffaf653be0
[   17.018720][    C2] RBP: 0000000000000000 R08: 0000000000000001 R09: ffffed1006c266fa
[   17.018721][    C2] R10: ffff8880361337d3 R11: ffffffffb0011288 R12: 0000000000000000
[   17.018723][    C2] R13: ffff888001bf2300 R14: dffffc0000000000 R15: 0000000000000000
[ 17.018727][ C2] ? ct_kernel_exit.constprop.0 (kernel/context_tracking.c:146) 
[ 17.018731][ C2] default_idle (./arch/x86/include/asm/paravirt.h:107 arch/x86/kernel/process.c:743) 
[ 17.018734][ C2] default_idle_call (./include/linux/cpuidle.h:143 kernel/sched/idle.c:118) 
[ 17.018737][ C2] cpuidle_idle_call (kernel/sched/idle.c:186) 
[ 17.018740][ C2] ? __pfx_cpuidle_idle_call (kernel/sched/idle.c:168) 
[ 17.018744][ C2] ? tsc_verify_tsc_adjust (arch/x86/kernel/tsc_sync.c:60) 
[ 17.018748][ C2] do_idle (kernel/sched/idle.c:325) 
[ 17.018752][ C2] cpu_startup_entry (kernel/sched/idle.c:422 (discriminator 1)) 
[ 17.018755][ C2] start_secondary (arch/x86/kernel/smpboot.c:203 arch/x86/kernel/smpboot.c:283) 
[ 17.018757][ C2] ? __pfx_start_secondary (arch/x86/kernel/smpboot.c:233) 
[ 17.018762][ C2] common_startup_64 (arch/x86/kernel/head_64.S:419) 
| [   19.079947][    C2] INFO: lockdep is turned off.
| [   19.080168][    C2] Preemption disabled at:
| [ 19.080170][ C2] __slab_alloc.constprop.0 (mm/slub.c:3945) 
| [   19.080640][    C2] Tainted: [W]=WARN
[   19.080641][    C2] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[   19.080644][    C2] Call Trace:
[   19.080646][    C2]  <IRQ>
[ 19.080648][ C2] dump_stack_lvl (lib/dump_stack.c:123) 
[ 19.080658][ C2] __might_resched (kernel/sched/core.c:8796) 
[ 19.080667][ C2] down_write (./include/linux/kernel.h:73 kernel/locking/rwsem.c:1576) 
[ 19.080672][ C2] ? __pfx_down_write (kernel/locking/rwsem.c:1575) 
[ 19.080675][ C2] ? simple_recursive_removal (fs/libfs.c:614) 
[ 19.080681][ C2] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:745) 
[ 19.080687][ 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) 
[ 19.080694][ C2] simple_recursive_removal (./include/linux/dcache.h:409 ./include/linux/dcache.h:424 ./include/linux/dcache.h:434 fs/libfs.c:617) 
[ 19.080697][ 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) 
[ 19.080701][ C2] ? __pfx_remove_one (fs/debugfs/inode.c:780) 
[ 19.080707][ C2] debugfs_remove (fs/debugfs/inode.c:806 fs/debugfs/inode.c:799) 
[ 19.080710][ C2] ref_tracker_dir_exit (lib/ref_tracker.c:411 lib/ref_tracker.c:195) 
[ 19.080718][ C2] ? __pfx_ref_tracker_free (lib/ref_tracker.c:253) 
[ 19.080722][ 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) 
[ 19.080729][ C2] ? rcu_do_batch (kernel/rcu/tree.c:2576) 
[ 19.080733][ C2] ? __pfx_ref_tracker_dir_exit (lib/ref_tracker.c:189) 
[ 19.080736][ C2] ? irq_exit_rcu (kernel/softirq.c:698) 
[ 19.080743][ C2] ? sysvec_apic_timer_interrupt (arch/x86/kernel/apic/apic.c:1050 arch/x86/kernel/apic/apic.c:1050) 
[ 19.080749][ C2] ? asm_sysvec_apic_timer_interrupt (./arch/x86/include/asm/idtentry.h:702) 
[ 19.080754][ C2] ? _raw_spin_unlock_irqrestore (./include/linux/spinlock_api_smp.h:152 kernel/locking/spinlock.c:194) 
[ 19.080759][ C2] ? get_partial_node.part.0 (mm/slub.c:2902) 
[ 19.080762][ C2] ? ___slab_alloc (mm/slub.c:2863 mm/slub.c:2980 mm/slub.c:3838) 
[ 19.080765][ C2] ? __slab_alloc.constprop.0 (mm/slub.c:3948) 
[ 19.080768][ C2] ? kmem_cache_alloc_noprof (mm/slub.c:4023 mm/slub.c:4184 mm/slub.c:4203) 
[ 19.080772][ C2] ? __alloc_object (mm/kmemleak.c:481 mm/kmemleak.c:661) 
[ 19.080777][ C2] ? __create_object (mm/kmemleak.c:770) 
[ 19.080781][ C2] ? __kmalloc_cache_noprof (./include/linux/kmemleak.h:43 mm/slub.c:4151 mm/slub.c:4196 mm/slub.c:4353) 
[ 19.080784][ C2] ? bpf_sk_storage_free (./include/linux/rcupdate.h:341 ./include/linux/rcupdate.h:871 net/core/bpf_sk_storage.c:61) 
[ 19.080789][ C2] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:745) 
[ 19.080793][ C2] __put_net (net/core/net_namespace.c:732) 
[ 19.080797][ C2] __sk_destruct (./include/net/net_namespace.h:288 ./include/net/net_namespace.h:390 net/core/sock.c:2376) 
[ 19.080801][ C2] ? rcu_do_batch (kernel/rcu/tree.c:2576) 
[ 19.080804][ C2] rcu_do_batch (kernel/rcu/tree.c:2576) 
[ 19.080808][ C2] ? __pfx_rcu_do_batch (kernel/rcu/tree.c:2500) 
[ 19.080812][ C2] ? trace_irq_enable.constprop.0 (./include/trace/events/preemptirq.h:40) 
[ 19.080820][ C2] ? _raw_spin_unlock_irqrestore (./arch/x86/include/asm/preempt.h:104 ./include/linux/spinlock_api_smp.h:152 kernel/locking/spinlock.c:194) 
[ 19.080825][ C2] rcu_core (kernel/rcu/tree.c:2834) 
[ 19.080830][ C2] handle_softirqs (kernel/softirq.c:579) 
[ 19.080836][ C2] __irq_exit_rcu (kernel/softirq.c:614 kernel/softirq.c:453 kernel/softirq.c:680) 
[ 19.080839][ C2] irq_exit_rcu (kernel/softirq.c:698) 
[ 19.080842][ C2] sysvec_apic_timer_interrupt (arch/x86/kernel/apic/apic.c:1050 arch/x86/kernel/apic/apic.c:1050) 
[   19.080845][    C2]  </IRQ>
[   19.080846][    C2]  <TASK>
[ 19.080848][ C2] asm_sysvec_apic_timer_interrupt (./arch/x86/include/asm/idtentry.h:702) 
[ 19.080851][ C2] RIP: 0010:_raw_spin_unlock_irqrestore (./include/linux/spinlock_api_smp.h:152 kernel/locking/spinlock.c:194) 
[ 19.080856][ 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
[   19.080859][    C2] RSP: 0018:ffffc900009d7808 EFLAGS: 00000206
[   19.080863][    C2] RAX: 0000000000000046 RBX: 0000000000000200 RCX: fffffffface43b9f
[   19.080865][    C2] RDX: 0000000000000000 RSI: ffffffffaf653b60 RDI: 0000000000000001
[   19.080867][    C2] RBP: ffff88800104f440 R08: 0000000000000000 R09: 0000000000000000
[   19.080869][    C2] R10: ffffffffb0de68d7 R11: 0000000000002800 R12: ffff88800104f440
[   19.080871][    C2] R13: ffffea000023a880 R14: ffff88800104de40 R15: ffff888008ea24e8
[ 19.080875][ 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) 
[ 19.080881][ C2] get_partial_node.part.0 (mm/slub.c:2902) 
[ 19.080886][ C2] ___slab_alloc (mm/slub.c:2863 mm/slub.c:2980 mm/slub.c:3838) 
[ 19.080890][ C2] ? __alloc_object (mm/kmemleak.c:481 mm/kmemleak.c:661) 
[ 19.080893][ C2] ? kmem_cache_free (./arch/x86/include/asm/jump_label.h:36 ./include/linux/page-flags.h:206 ./include/linux/page-flags.h:284 ./include/linux/mm.h:1404 mm/slab.h:211 mm/slub.c:4744) 
[ 19.080897][ C2] ? __put_anon_vma (mm/rmap.c:2757) 
[ 19.080902][ C2] ? __alloc_object (mm/kmemleak.c:481 mm/kmemleak.c:661) 
[ 19.080906][ C2] __slab_alloc.constprop.0 (mm/slub.c:3948) 
[ 19.080909][ C2] ? __alloc_object (mm/kmemleak.c:481 mm/kmemleak.c:661) 
[ 19.080912][ C2] kmem_cache_alloc_noprof (mm/slub.c:4023 mm/slub.c:4184 mm/slub.c:4203) 
[ 19.080915][ C2] ? kmem_cache_free (mm/slub.c:2333 mm/slub.c:4642 mm/slub.c:4744) 
[ 19.080920][ C2] __alloc_object (mm/kmemleak.c:481 mm/kmemleak.c:661) 
[ 19.080923][ C2] __create_object (mm/kmemleak.c:770) 
[ 19.080928][ C2] __kmalloc_cache_noprof (./include/linux/kmemleak.h:43 mm/slub.c:4151 mm/slub.c:4196 mm/slub.c:4353) 
[ 19.080933][ C2] kmem_cache_free (mm/slub.c:2333 mm/slub.c:4642 mm/slub.c:4744) 
[ 19.080936][ C2] ? __put_anon_vma (mm/rmap.c:2757) 
[ 19.080940][ C2] __put_anon_vma (mm/rmap.c:2757) 
[ 19.080944][ C2] unlink_anon_vmas (./include/linux/rmap.h:117 mm/rmap.c:444) 
[ 19.080947][ C2] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:745) 
[ 19.080951][ C2] free_pgtables (mm/memory.c:392) 
[ 19.080959][ C2] ? __pfx_free_pgtables (mm/memory.c:349) 
[ 19.080962][ C2] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5834) 
[ 19.080964][ C2] ? exit_mmap (./include/linux/seqlock.h:431 ./include/linux/mmap_lock.h:83 ./include/linux/mmap_lock.h:130 mm/mmap.c:1292) 
[ 19.080971][ 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) 
[ 19.080974][ C2] ? __pfx_down_write (kernel/locking/rwsem.c:1575) 
[ 19.080978][ C2] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:745) 
[ 19.080980][ C2] ? trace_lock_release (./include/trace/events/lock.h:69 (discriminator 21)) 
[ 19.080988][ C2] exit_mmap (mm/mmap.c:1297) 
[ 19.080993][ C2] ? __pfx_exit_mmap (mm/mmap.c:1259) 
[ 19.080996][ C2] ? __mutex_lock (./arch/x86/include/asm/preempt.h:104 kernel/locking/mutex.c:727 kernel/locking/mutex.c:746) 
[ 19.081001][ C2] ? lock_release (kernel/locking/lockdep.c:118 kernel/locking/lockdep.c:5884) 
[ 19.081004][ 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) 
[ 19.081012][ C2] mmput (kernel/fork.c:1449 kernel/fork.c:1383 kernel/fork.c:1404) 
[ 19.081018][ C2] exit_mm (kernel/exit.c:596) 
[ 19.081023][ C2] do_exit (kernel/exit.c:950) 
[ 19.081028][ C2] do_group_exit (kernel/exit.c:1089) 
[ 19.081032][ C2] __x64_sys_exit_group (kernel/exit.c:1117) 
[ 19.081035][ C2] x64_sys_call (arch/x86/entry/syscall_64.c:37) 
[ 19.081042][ C2] do_syscall_64 (arch/x86/entry/syscall_64.c:63 arch/x86/entry/syscall_64.c:94) 
[ 19.081046][ C2] entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:130) 
[   19.081049][    C2] RIP: 0033:0x7fdaca348abd
[ 19.081052][ C2] Code: Unable to access opcode bytes at 0x7fdaca348a93.

Code starting with the faulting instruction
===========================================
[   19.081054][    C2] RSP: 002b:00007ffdf22fde18 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7
[   19.081057][    C2] RAX: ffffffffffffffda RBX: 00007fdaca4259c0 RCX: 00007fdaca348abd
[   19.081059][    C2] RDX: 00000000000000e7 RSI: ffffffffffffff80 RDI: 0000000000000000
[   19.081060][    C2] RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000030
[   19.081062][    C2] R10: 00007ffdf22fdca0 R11: 0000000000000246 R12: 00007fdaca4259c0


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