======================================
| [   16.312596][    C3] 1 lock held by swapper/3/0:
| [ 16.312806][ C3] #0: ffffffff941774c0 (rcu_callback){....}-{0:0}, at: rcu_do_batch (./include/linux/rcupdate.h:331 kernel/rcu/tree.c:2570) 
| [   16.313178][    C3]
| [   16.313178][    C3] stack backtrace:
[   16.313445][    C3] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[   16.313447][    C3] Call Trace:
[   16.313449][    C3]  <IRQ>
[ 16.313452][ C3] dump_stack_lvl (lib/dump_stack.c:123) 
[ 16.313459][ C3] print_usage_bug.part.0 (kernel/locking/lockdep.c:4048) 
[ 16.313464][ C3] mark_lock_irq (kernel/locking/lockdep.c:4013 kernel/locking/lockdep.c:4059 kernel/locking/lockdep.c:4270) 
[ 16.313468][ C3] ? __pfx_unwind_next_frame (arch/x86/kernel/unwind_orc.c:469) 
[ 16.313475][ C3] ? save_trace (kernel/locking/lockdep.c:595) 
[ 16.313483][ C3] mark_lock (kernel/locking/lockdep.c:4756) 
[ 16.313486][ C3] mark_usage (kernel/locking/lockdep.c:4645) 
[ 16.313489][ C3] __lock_acquire (kernel/locking/lockdep.c:5194) 
[ 16.313492][ C3] ? __lock_acquire (kernel/locking/lockdep.c:5240) 
[ 16.313496][ C3] lock_acquire.part.0 (kernel/locking/lockdep.c:473 kernel/locking/lockdep.c:5873) 
[ 16.313499][ C3] ? simple_pin_fs (fs/libfs.c:1067) 
[ 16.313504][ C3] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:745) 
[ 16.313509][ C3] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5834) 
[ 16.313512][ C3] ? simple_pin_fs (fs/libfs.c:1067) 
[ 16.313517][ C3] _raw_spin_lock (./include/linux/spinlock_api_smp.h:134 kernel/locking/spinlock.c:154) 
[ 16.313520][ C3] ? simple_pin_fs (fs/libfs.c:1067) 
[ 16.313523][ C3] simple_pin_fs (fs/libfs.c:1067) 
[ 16.313527][ C3] debugfs_remove (fs/debugfs/inode.c:805 fs/debugfs/inode.c:799) 
[ 16.313530][ C3] ref_tracker_dir_exit (lib/ref_tracker.c:411 lib/ref_tracker.c:195) 
[ 16.313538][ C3] ? __pfx_ref_tracker_free (lib/ref_tracker.c:253) 
[ 16.313542][ 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:2376) 
[ 16.313550][ C3] ? rcu_do_batch (kernel/rcu/tree.c:2576) 
[ 16.313552][ C3] ? __pfx_ref_tracker_dir_exit (lib/ref_tracker.c:189) 
[ 16.313556][ C3] ? irq_exit_rcu (kernel/softirq.c:698) 
[ 16.313559][ C3] ? sysvec_apic_timer_interrupt (arch/x86/kernel/apic/apic.c:1050 arch/x86/kernel/apic/apic.c:1050) 
[ 16.313563][ C3] ? asm_sysvec_apic_timer_interrupt (./arch/x86/include/asm/idtentry.h:702) 
[ 16.313567][ C3] ? pv_native_safe_halt (arch/x86/kernel/paravirt.c:82) 
[ 16.313570][ C3] ? default_idle (./arch/x86/include/asm/paravirt.h:107 arch/x86/kernel/process.c:743) 
[ 16.313573][ C3] ? default_idle_call (./include/linux/cpuidle.h:143 kernel/sched/idle.c:118) 
[ 16.313575][ C3] ? cpuidle_idle_call (kernel/sched/idle.c:186) 
[ 16.313580][ C3] ? do_idle (kernel/sched/idle.c:325) 
[ 16.313582][ C3] ? cpu_startup_entry (kernel/sched/idle.c:422 (discriminator 1)) 
[ 16.313584][ C3] ? start_secondary (arch/x86/kernel/smpboot.c:203 arch/x86/kernel/smpboot.c:283) 
[ 16.313589][ C3] ? common_startup_64 (arch/x86/kernel/head_64.S:419) 
[ 16.313599][ C3] __put_net (net/core/net_namespace.c:732) 
[ 16.313604][ C3] __sk_destruct (./include/net/net_namespace.h:288 ./include/net/net_namespace.h:390 net/core/sock.c:2376) 
[ 16.313609][ C3] ? rcu_do_batch (kernel/rcu/tree.c:2576) 
[ 16.313611][ C3] rcu_do_batch (kernel/rcu/tree.c:2576) 
[ 16.313614][ C3] ? find_held_lock (kernel/locking/lockdep.c:5353) 
[ 16.313619][ C3] ? __pfx_rcu_do_batch (kernel/rcu/tree.c:2500) 
[ 16.313622][ C3] ? _raw_spin_unlock_irqrestore (./include/linux/spinlock_api_smp.h:151 kernel/locking/spinlock.c:194) 
[ 16.313626][ C3] ? lockdep_hardirqs_on (kernel/locking/lockdep.c:4475) 
[ 16.313628][ C3] ? _raw_spin_unlock_irqrestore (./arch/x86/include/asm/preempt.h:104 ./include/linux/spinlock_api_smp.h:152 kernel/locking/spinlock.c:194) 
[ 16.313633][ C3] rcu_core (kernel/rcu/tree.c:2834) 
[ 16.313639][ C3] handle_softirqs (kernel/softirq.c:579) 
[ 16.313644][ C3] __irq_exit_rcu (kernel/softirq.c:614 kernel/softirq.c:453 kernel/softirq.c:680) 
[ 16.313647][ C3] irq_exit_rcu (kernel/softirq.c:698) 
[ 16.313650][ C3] sysvec_apic_timer_interrupt (arch/x86/kernel/apic/apic.c:1050 arch/x86/kernel/apic/apic.c:1050) 
[   16.313653][    C3]  </IRQ>
[   16.313654][    C3]  <TASK>
[ 16.313656][ C3] asm_sysvec_apic_timer_interrupt (./arch/x86/include/asm/idtentry.h:702) 
[ 16.313659][ C3] RIP: 0010:pv_native_safe_halt (arch/x86/kernel/paravirt.c:82) 
[ 16.313663][ C3] 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
[   16.313665][    C3] RSP: 0018:ffffc90000157de8 EFLAGS: 00000246
[   16.313668][    C3] RAX: 0000000000046fa3 RBX: 1ffff9200002afc1 RCX: ffffffff9318f5d9
[   16.313670][    C3] RDX: 0000000000000000 RSI: ffffffff93c8f4e4 RDI: ffffffff93453be0
[   16.313672][    C3] RBP: 0000000000000000 R08: 0000000000000001 R09: ffffed1006c366fa
[   16.313674][    C3] R10: ffff8880361b37d3 R11: ffffffff93e11288 R12: 0000000000000000
[   16.313675][    C3] R13: ffff888001bf45c0 R14: dffffc0000000000 R15: 0000000000000000
[ 16.313679][ C3] ? ct_kernel_exit.constprop.0 (kernel/context_tracking.c:146) 
[ 16.313684][ C3] default_idle (./arch/x86/include/asm/paravirt.h:107 arch/x86/kernel/process.c:743) 
[ 16.313687][ C3] default_idle_call (./include/linux/cpuidle.h:143 kernel/sched/idle.c:118) 
[ 16.313689][ C3] cpuidle_idle_call (kernel/sched/idle.c:186) 
[ 16.313692][ C3] ? __pfx_cpuidle_idle_call (kernel/sched/idle.c:168) 
[ 16.313696][ C3] ? tsc_verify_tsc_adjust (arch/x86/kernel/tsc_sync.c:60) 
[ 16.313701][ C3] do_idle (kernel/sched/idle.c:325) 
[ 16.313704][ C3] cpu_startup_entry (kernel/sched/idle.c:422 (discriminator 1)) 
[ 16.313707][ C3] start_secondary (arch/x86/kernel/smpboot.c:203 arch/x86/kernel/smpboot.c:283) 
[ 16.313710][ C3] ? __pfx_start_secondary (arch/x86/kernel/smpboot.c:233) 
[ 16.313715][ C3] common_startup_64 (arch/x86/kernel/head_64.S:419) 
| [   16.331416][    C3] RCU nest depth: 0, expected: 0
| [   16.331611][    C3] INFO: lockdep is turned off.
| [   16.331804][    C3] Preemption disabled at:
| [ 16.331806][ C3] 0x0 
[   16.332161][    C3] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[   16.332162][    C3] Call Trace:
[   16.332164][    C3]  <IRQ>
[ 16.332166][ C3] dump_stack_lvl (lib/dump_stack.c:123) 
[ 16.332172][ C3] __might_resched (kernel/sched/core.c:8796) 
[ 16.332181][ C3] down_write (./include/linux/kernel.h:73 kernel/locking/rwsem.c:1576) 
[ 16.332185][ C3] ? __pfx_down_write (kernel/locking/rwsem.c:1575) 
[ 16.332188][ C3] ? simple_recursive_removal (fs/libfs.c:614) 
[ 16.332191][ C3] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:745) 
[ 16.332196][ 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) 
[ 16.332202][ C3] simple_recursive_removal (./include/linux/dcache.h:409 ./include/linux/dcache.h:424 ./include/linux/dcache.h:434 fs/libfs.c:617) 
[ 16.332205][ 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) 
[ 16.332208][ C3] ? __pfx_remove_one (fs/debugfs/inode.c:780) 
[ 16.332213][ C3] debugfs_remove (fs/debugfs/inode.c:806 fs/debugfs/inode.c:799) 
[ 16.332216][ C3] ref_tracker_dir_exit (lib/ref_tracker.c:411 lib/ref_tracker.c:195) 
[ 16.332222][ C3] ? __pfx_ref_tracker_free (lib/ref_tracker.c:253) 
[ 16.332225][ 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:2376) 
[ 16.332229][ C3] ? rcu_do_batch (kernel/rcu/tree.c:2576) 
[ 16.332232][ C3] ? __pfx_ref_tracker_dir_exit (lib/ref_tracker.c:189) 
[ 16.332236][ C3] ? irq_exit_rcu (kernel/softirq.c:698) 
[ 16.332239][ C3] ? sysvec_apic_timer_interrupt (arch/x86/kernel/apic/apic.c:1050 arch/x86/kernel/apic/apic.c:1050) 
[ 16.332244][ C3] ? asm_sysvec_apic_timer_interrupt (./arch/x86/include/asm/idtentry.h:702) 
[ 16.332247][ C3] ? pv_native_safe_halt (arch/x86/kernel/paravirt.c:82) 
[ 16.332250][ C3] ? default_idle (./arch/x86/include/asm/paravirt.h:107 arch/x86/kernel/process.c:743) 
[ 16.332253][ C3] ? default_idle_call (./include/linux/cpuidle.h:143 kernel/sched/idle.c:118) 
[ 16.332256][ C3] ? cpuidle_idle_call (kernel/sched/idle.c:186) 
[ 16.332258][ C3] ? do_idle (kernel/sched/idle.c:325) 
[ 16.332261][ C3] ? cpu_startup_entry (kernel/sched/idle.c:422 (discriminator 1)) 
[ 16.332263][ C3] ? start_secondary (arch/x86/kernel/smpboot.c:203 arch/x86/kernel/smpboot.c:283) 
[ 16.332266][ C3] ? common_startup_64 (arch/x86/kernel/head_64.S:419) 
[ 16.332272][ C3] __put_net (net/core/net_namespace.c:732) 
[ 16.332275][ C3] __sk_destruct (./include/net/net_namespace.h:288 ./include/net/net_namespace.h:390 net/core/sock.c:2376) 
[ 16.332279][ C3] ? rcu_do_batch (kernel/rcu/tree.c:2576) 
[ 16.332282][ C3] rcu_do_batch (kernel/rcu/tree.c:2576) 
[ 16.332285][ C3] ? find_held_lock (kernel/locking/lockdep.c:5353) 
[ 16.332291][ C3] ? __pfx_rcu_do_batch (kernel/rcu/tree.c:2500) 
[ 16.332294][ C3] ? _raw_spin_unlock_irqrestore (./include/linux/spinlock_api_smp.h:151 kernel/locking/spinlock.c:194) 
[ 16.332298][ C3] ? lockdep_hardirqs_on (kernel/locking/lockdep.c:4475) 
[ 16.332301][ C3] ? _raw_spin_unlock_irqrestore (./arch/x86/include/asm/preempt.h:104 ./include/linux/spinlock_api_smp.h:152 kernel/locking/spinlock.c:194) 
[ 16.332306][ C3] rcu_core (kernel/rcu/tree.c:2834) 
[ 16.332310][ C3] handle_softirqs (kernel/softirq.c:579) 
[ 16.332315][ C3] __irq_exit_rcu (kernel/softirq.c:614 kernel/softirq.c:453 kernel/softirq.c:680) 
[ 16.332318][ C3] irq_exit_rcu (kernel/softirq.c:698) 
[ 16.332321][ C3] sysvec_apic_timer_interrupt (arch/x86/kernel/apic/apic.c:1050 arch/x86/kernel/apic/apic.c:1050) 
[   16.332325][    C3]  </IRQ>
[   16.332326][    C3]  <TASK>
[ 16.332327][ C3] asm_sysvec_apic_timer_interrupt (./arch/x86/include/asm/idtentry.h:702) 
[ 16.332330][ C3] RIP: 0010:pv_native_safe_halt (arch/x86/kernel/paravirt.c:82) 
[ 16.332334][ C3] 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
[   16.332337][    C3] RSP: 0018:ffffc90000157de8 EFLAGS: 00000246
[   16.332340][    C3] RAX: 0000000000046fa3 RBX: 1ffff9200002afc1 RCX: ffffffff9318f5d9
[   16.332342][    C3] RDX: 0000000000000000 RSI: ffffffff93c8f4e4 RDI: ffffffff93453be0
[   16.332343][    C3] RBP: 0000000000000000 R08: 0000000000000001 R09: ffffed1006c366fa
[   16.332345][    C3] R10: ffff8880361b37d3 R11: ffffffff93e11288 R12: 0000000000000000
[   16.332347][    C3] R13: ffff888001bf45c0 R14: dffffc0000000000 R15: 0000000000000000
[ 16.332350][ C3] ? ct_kernel_exit.constprop.0 (kernel/context_tracking.c:146) 
[ 16.332355][ C3] default_idle (./arch/x86/include/asm/paravirt.h:107 arch/x86/kernel/process.c:743) 
[ 16.332358][ C3] default_idle_call (./include/linux/cpuidle.h:143 kernel/sched/idle.c:118) 
[ 16.332360][ C3] cpuidle_idle_call (kernel/sched/idle.c:186) 
[ 16.332364][ C3] ? __pfx_cpuidle_idle_call (kernel/sched/idle.c:168) 
[ 16.332367][ C3] ? tsc_verify_tsc_adjust (arch/x86/kernel/tsc_sync.c:60) 
[ 16.332372][ C3] do_idle (kernel/sched/idle.c:325) 
[ 16.332375][ C3] cpu_startup_entry (kernel/sched/idle.c:422 (discriminator 1)) 
[ 16.332378][ C3] start_secondary (arch/x86/kernel/smpboot.c:203 arch/x86/kernel/smpboot.c:283) 
[ 16.332381][ C3] ? __pfx_start_secondary (arch/x86/kernel/smpboot.c:233) 
[ 16.332385][ C3] common_startup_64 (arch/x86/kernel/head_64.S:419) 
| [   18.661886][    C2] INFO: lockdep is turned off.
| [   18.662100][    C2] Preemption disabled at:
| [ 18.662102][ C2] handle_softirqs (kernel/softirq.c:553) 
| [   18.662561][    C2] Tainted: [W]=WARN
[   18.662562][    C2] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[   18.662565][    C2] Call Trace:
[   18.662567][    C2]  <IRQ>
[ 18.662569][ C2] dump_stack_lvl (lib/dump_stack.c:123) 
[ 18.662579][ C2] __might_resched (kernel/sched/core.c:8796) 
[ 18.662588][ C2] down_write (./include/linux/kernel.h:73 kernel/locking/rwsem.c:1576) 
[ 18.662593][ C2] ? __pfx_down_write (kernel/locking/rwsem.c:1575) 
[ 18.662596][ C2] ? simple_recursive_removal (fs/libfs.c:614) 
[ 18.662602][ C2] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:745) 
[ 18.662609][ 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) 
[ 18.662616][ C2] simple_recursive_removal (./include/linux/dcache.h:409 ./include/linux/dcache.h:424 ./include/linux/dcache.h:434 fs/libfs.c:617) 
[ 18.662619][ 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) 
[ 18.662622][ C2] ? __pfx_remove_one (fs/debugfs/inode.c:780) 
[ 18.662629][ C2] debugfs_remove (fs/debugfs/inode.c:806 fs/debugfs/inode.c:799) 
[ 18.662632][ C2] ref_tracker_dir_exit (lib/ref_tracker.c:411 lib/ref_tracker.c:195) 
[ 18.662640][ C2] ? __pfx_ref_tracker_free (lib/ref_tracker.c:253) 
[ 18.662644][ 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) 
[ 18.662651][ C2] ? rcu_do_batch (kernel/rcu/tree.c:2576) 
[ 18.662654][ C2] ? __pfx_ref_tracker_dir_exit (lib/ref_tracker.c:189) 
[ 18.662657][ C2] ? irq_exit_rcu (kernel/softirq.c:698) 
[ 18.662661][ C2] ? sysvec_apic_timer_interrupt (arch/x86/kernel/apic/apic.c:1050 arch/x86/kernel/apic/apic.c:1050) 
[ 18.662667][ C2] ? asm_sysvec_apic_timer_interrupt (./arch/x86/include/asm/idtentry.h:702) 
[ 18.662672][ C2] ? stack_trace_consume_entry (kernel/stacktrace.c:86) 
[ 18.662675][ C2] ? arch_stack_walk (arch/x86/kernel/stacktrace.c:27 (discriminator 1)) 
[ 18.662681][ C2] ? stack_trace_save (kernel/stacktrace.c:123) 
[ 18.662684][ C2] ? kasan_save_stack (mm/kasan/common.c:48) 
[ 18.662689][ C2] ? kasan_record_aux_stack (mm/kasan/generic.c:548) 
[ 18.662694][ 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:3092) 
[ 18.662699][ C2] ? __put_anon_vma (mm/rmap.c:2757) 
[ 18.662704][ C2] ? unlink_anon_vmas (./include/linux/rmap.h:117 mm/rmap.c:444) 
[ 18.662707][ C2] ? bpf_sk_storage_free (./include/linux/rcupdate.h:341 ./include/linux/rcupdate.h:871 net/core/bpf_sk_storage.c:61) 
[ 18.662712][ C2] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:745) 
[ 18.662717][ C2] __put_net (net/core/net_namespace.c:732) 
[ 18.662721][ C2] __sk_destruct (./include/net/net_namespace.h:288 ./include/net/net_namespace.h:390 net/core/sock.c:2376) 
[ 18.662725][ C2] ? rcu_do_batch (kernel/rcu/tree.c:2576) 
[ 18.662727][ C2] rcu_do_batch (kernel/rcu/tree.c:2576) 
[ 18.662732][ C2] ? __pfx_rcu_do_batch (kernel/rcu/tree.c:2500) 
[ 18.662736][ C2] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:745) 
[ 18.662738][ C2] ? trace_irq_enable.constprop.0 (./include/trace/events/preemptirq.h:40) 
[ 18.662747][ C2] rcu_core (kernel/rcu/tree.c:2834) 
[ 18.662751][ C2] handle_softirqs (kernel/softirq.c:579) 
[ 18.662756][ C2] __irq_exit_rcu (kernel/softirq.c:614 kernel/softirq.c:453 kernel/softirq.c:680) 
[ 18.662759][ C2] irq_exit_rcu (kernel/softirq.c:698) 
[ 18.662762][ C2] sysvec_apic_timer_interrupt (arch/x86/kernel/apic/apic.c:1050 arch/x86/kernel/apic/apic.c:1050) 
[   18.662766][    C2]  </IRQ>
[   18.662767][    C2]  <TASK>
[ 18.662768][ C2] asm_sysvec_apic_timer_interrupt (./arch/x86/include/asm/idtentry.h:702) 
[ 18.662771][ C2] RIP: 0010:stack_trace_consume_entry (kernel/stacktrace.c:86) 
[ 18.662775][ C2] Code: 0f 1e fa 0f 1f 44 00 00 48 b8 00 00 00 00 00 fc ff df 55 53 48 89 fb 48 83 c7 10 48 89 fa 48 c1 ea 03 48 83 ec 08 0f b6 04 02 <84> c0 74 08 3c 03 0f 8e e7 00 00 00 48 8d 7b 08 8b 6b 10 48 b8 00
All code
========
   0:	0f 1e fa             	nop    %edx
   3:	0f 1f 44 00 00       	nopl   0x0(%rax,%rax,1)
   8:	48 b8 00 00 00 00 00 	movabs $0xdffffc0000000000,%rax
   f:	fc ff df 
  12:	55                   	push   %rbp
  13:	53                   	push   %rbx
  14:	48 89 fb             	mov    %rdi,%rbx
  17:	48 83 c7 10          	add    $0x10,%rdi
  1b:	48 89 fa             	mov    %rdi,%rdx
  1e:	48 c1 ea 03          	shr    $0x3,%rdx
  22:	48 83 ec 08          	sub    $0x8,%rsp
  26:	0f b6 04 02          	movzbl (%rdx,%rax,1),%eax
  2a:*	84 c0                	test   %al,%al		<-- trapping instruction
  2c:	74 08                	je     0x36
  2e:	3c 03                	cmp    $0x3,%al
  30:	0f 8e e7 00 00 00    	jle    0x11d
  36:	48 8d 7b 08          	lea    0x8(%rbx),%rdi
  3a:	8b 6b 10             	mov    0x10(%rbx),%ebp
  3d:	48                   	rex.W
  3e:	b8                   	.byte 0xb8
	...

Code starting with the faulting instruction
===========================================
   0:	84 c0                	test   %al,%al
   2:	74 08                	je     0xc
   4:	3c 03                	cmp    $0x3,%al
   6:	0f 8e e7 00 00 00    	jle    0xf3
   c:	48 8d 7b 08          	lea    0x8(%rbx),%rdi
  10:	8b 6b 10             	mov    0x10(%rbx),%ebp
  13:	48                   	rex.W
  14:	b8                   	.byte 0xb8
	...
[   18.662777][    C2] RSP: 0018:ffffc900008276f8 EFLAGS: 00000292
[   18.662782][    C2] RAX: 0000000000000000 RBX: ffffc900008277e0 RCX: ffffc90000828001
[   18.662784][    C2] RDX: 1ffff92000104efe RSI: ffffffff91012acd RDI: ffffc900008277f0
[   18.662785][    C2] RBP: ffffc900008277b0 R08: 0000000000000000 R09: ffffc90000827759
[   18.662787][    C2] R10: ffffffff90812687 R11: ffffc90000827758 R12: ffffc900008277e0
[   18.662789][    C2] R13: 0000000000000000 R14: ffff888009fb2300 R15: ffff88800b052798
[ 18.662792][ 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) 
[ 18.662798][ C2] ? exit_mmap (mm/mmap.c:1297) 
[ 18.662805][ C2] ? unwind_get_return_address (arch/x86/kernel/unwind_orc.c:369 arch/x86/kernel/unwind_orc.c:364) 
[ 18.662808][ C2] ? __pfx_stack_trace_consume_entry (kernel/stacktrace.c:83) 
[ 18.662810][ C2] arch_stack_walk (arch/x86/kernel/stacktrace.c:27 (discriminator 1)) 
[ 18.662815][ C2] ? exit_mmap (mm/mmap.c:1297) 
[ 18.662820][ C2] stack_trace_save (kernel/stacktrace.c:123) 
[ 18.662822][ C2] ? __pfx_stack_trace_save (kernel/stacktrace.c:114) 
[ 18.662827][ C2] ? kasan_save_stack (mm/kasan/common.c:49) 
[ 18.662829][ C2] ? kasan_save_stack (mm/kasan/common.c:48) 
[ 18.662832][ C2] kasan_save_stack (mm/kasan/common.c:48) 
[ 18.662835][ C2] ? kasan_save_stack (mm/kasan/common.c:48) 
[ 18.662838][ C2] ? kasan_record_aux_stack (mm/kasan/generic.c:548) 
[ 18.662840][ 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:3092) 
[ 18.662843][ C2] ? __put_anon_vma (mm/rmap.c:2757) 
[ 18.662845][ C2] ? unlink_anon_vmas (./include/linux/rmap.h:117 mm/rmap.c:444) 
[ 18.662848][ C2] ? free_pgtables (mm/memory.c:392) 
[ 18.662851][ C2] ? do_group_exit (kernel/exit.c:1089) 
[ 18.662857][ C2] ? __x64_sys_exit_group (kernel/exit.c:1117) 
[ 18.662860][ C2] ? x64_sys_call (arch/x86/entry/syscall_64.c:37) 
[ 18.662866][ C2] ? do_syscall_64 (arch/x86/entry/syscall_64.c:63 arch/x86/entry/syscall_64.c:94) 
[ 18.662869][ C2] ? entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:130) 
[ 18.662872][ C2] ? 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) 
[ 18.662876][ C2] ? __pfx_do_raw_spin_lock (kernel/locking/spinlock_debug.c:114) 
[ 18.662880][ C2] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:745) 
[ 18.662883][ C2] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:745) 
[ 18.662886][ C2] ? trace_irq_enable.constprop.0 (./include/trace/events/preemptirq.h:40) 
[ 18.662890][ C2] ? _raw_spin_unlock_irqrestore (./arch/x86/include/asm/preempt.h:104 ./include/linux/spinlock_api_smp.h:152 kernel/locking/spinlock.c:194) 
[ 18.662895][ C2] ? debug_object_active_state (lib/debugobjects.c:1056) 
[ 18.662901][ C2] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:745) 
[ 18.662904][ C2] ? __virt_addr_valid (./include/linux/rcupdate.h:341 ./include/linux/rcupdate.h:953 ./include/linux/mmzone.h:2126 arch/x86/mm/physaddr.c:65) 
[ 18.662909][ C2] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:745) 
[ 18.662912][ C2] ? trace_lock_release (./include/trace/events/lock.h:69 (discriminator 21)) 
[ 18.662917][ C2] ? lock_release (kernel/locking/lockdep.c:118 kernel/locking/lockdep.c:5884) 
[ 18.662920][ C2] ? __virt_addr_valid (./arch/x86/include/asm/preempt.h:104 ./include/linux/rcupdate.h:955 ./include/linux/mmzone.h:2126 arch/x86/mm/physaddr.c:65) 
[ 18.662924][ C2] kasan_record_aux_stack (mm/kasan/generic.c:548) 
[ 18.662927][ C2] ? __pfx_slab_free_after_rcu_debug (mm/slub.c:4672) 
[ 18.662931][ 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:3092) 
[ 18.662936][ C2] __put_anon_vma (mm/rmap.c:2757) 
[ 18.662939][ C2] unlink_anon_vmas (./include/linux/rmap.h:117 mm/rmap.c:444) 
[ 18.662942][ C2] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:745) 
[ 18.662946][ C2] free_pgtables (mm/memory.c:392) 
[ 18.662952][ C2] ? __pfx_free_pgtables (mm/memory.c:349) 
[ 18.662954][ C2] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5834) 
[ 18.662957][ C2] ? exit_mmap (./include/linux/seqlock.h:431 ./include/linux/mmap_lock.h:83 ./include/linux/mmap_lock.h:130 mm/mmap.c:1292) 
[ 18.662961][ 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) 
[ 18.662964][ C2] ? __pfx_down_write (kernel/locking/rwsem.c:1575) 
[ 18.662967][ C2] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:745) 
[ 18.662970][ C2] ? trace_lock_release (./include/trace/events/lock.h:69 (discriminator 21)) 
[ 18.662974][ C2] exit_mmap (mm/mmap.c:1297) 
[ 18.662979][ C2] ? __pfx_exit_mmap (mm/mmap.c:1259) 
[ 18.662982][ C2] ? __mutex_lock (./arch/x86/include/asm/preempt.h:104 kernel/locking/mutex.c:727 kernel/locking/mutex.c:746) 
[ 18.662986][ C2] ? lock_release (kernel/locking/lockdep.c:118 kernel/locking/lockdep.c:5884) 
[ 18.662989][ 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) 
[ 18.662998][ C2] mmput (kernel/fork.c:1449 kernel/fork.c:1383 kernel/fork.c:1404) 
[ 18.663003][ C2] exit_mm (kernel/exit.c:596) 
[ 18.663007][ C2] do_exit (kernel/exit.c:950) 
[ 18.663011][ C2] do_group_exit (kernel/exit.c:1089) 
[ 18.663016][ C2] __x64_sys_exit_group (kernel/exit.c:1117) 
[ 18.663019][ C2] x64_sys_call (arch/x86/entry/syscall_64.c:37) 
[ 18.663022][ C2] do_syscall_64 (arch/x86/entry/syscall_64.c:63 arch/x86/entry/syscall_64.c:94) 
[ 18.663025][ C2] entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:130) 
[   18.663028][    C2] RIP: 0033:0x7fb352dc6abd
[ 18.663031][ C2] Code: Unable to access opcode bytes at 0x7fb352dc6a93.

Code starting with the faulting instruction
===========================================
[   18.663033][    C2] RSP: 002b:00007ffd17a68138 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7
[   18.663036][    C2] RAX: ffffffffffffffda RBX: 00007fb352ea39c0 RCX: 00007fb352dc6abd
[   18.663038][    C2] RDX: 00000000000000e7 RSI: ffffffffffffff80 RDI: 0000000000000000
[   18.663039][    C2] RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000030
[   18.663041][    C2] R10: 00007ffd17a67fc0 R11: 0000000000000246 R12: 00007fb352ea39c0


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