======================================
| [   15.022348][    C1] 1 lock held by swapper/1/0:
| [ 15.022534][ C1] #0: ffffffffafb774c0 (rcu_callback){....}-{0:0}, at: rcu_do_batch (./include/linux/rcupdate.h:331 kernel/rcu/tree.c:2570) 
| [   15.022869][    C1]
| [   15.022869][    C1] stack backtrace:
[   15.023105][    C1] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[   15.023107][    C1] Call Trace:
[   15.023109][    C1]  <IRQ>
[ 15.023112][ C1] dump_stack_lvl (lib/dump_stack.c:123) 
[ 15.023118][ C1] print_usage_bug.part.0 (kernel/locking/lockdep.c:4048) 
[ 15.023122][ C1] mark_lock_irq (kernel/locking/lockdep.c:4013 kernel/locking/lockdep.c:4059 kernel/locking/lockdep.c:4270) 
[ 15.023127][ C1] ? __pfx_unwind_next_frame (arch/x86/kernel/unwind_orc.c:469) 
[ 15.023131][ C1] ? save_trace (kernel/locking/lockdep.c:595) 
[ 15.023138][ C1] mark_lock (kernel/locking/lockdep.c:4756) 
[ 15.023141][ C1] mark_usage (kernel/locking/lockdep.c:4645) 
[ 15.023144][ C1] __lock_acquire (kernel/locking/lockdep.c:5194) 
[ 15.023147][ C1] ? __lock_acquire (kernel/locking/lockdep.c:5240) 
[ 15.023151][ C1] lock_acquire.part.0 (kernel/locking/lockdep.c:473 kernel/locking/lockdep.c:5873) 
[ 15.023154][ C1] ? simple_pin_fs (fs/libfs.c:1067) 
[ 15.023159][ C1] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:745) 
[ 15.023163][ C1] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5834) 
[ 15.023165][ C1] ? simple_pin_fs (fs/libfs.c:1067) 
[ 15.023170][ C1] _raw_spin_lock (./include/linux/spinlock_api_smp.h:134 kernel/locking/spinlock.c:154) 
[ 15.023173][ C1] ? simple_pin_fs (fs/libfs.c:1067) 
[ 15.023177][ C1] simple_pin_fs (fs/libfs.c:1067) 
[ 15.023181][ C1] debugfs_remove (fs/debugfs/inode.c:805 fs/debugfs/inode.c:799) 
[ 15.023184][ C1] ref_tracker_dir_exit (lib/ref_tracker.c:412 lib/ref_tracker.c:196) 
[ 15.023189][ C1] ? __pfx_ref_tracker_free (lib/ref_tracker.c:254) 
[ 15.023193][ C1] ? __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) 
[ 15.023198][ C1] ? rcu_do_batch (kernel/rcu/tree.c:2576) 
[ 15.023201][ C1] ? __pfx_ref_tracker_dir_exit (lib/ref_tracker.c:190) 
[ 15.023204][ C1] ? irq_exit_rcu (kernel/softirq.c:698) 
[ 15.023207][ C1] ? sysvec_apic_timer_interrupt (arch/x86/kernel/apic/apic.c:1050 arch/x86/kernel/apic/apic.c:1050) 
[ 15.023212][ C1] ? asm_sysvec_apic_timer_interrupt (./arch/x86/include/asm/idtentry.h:702) 
[ 15.023215][ C1] ? pv_native_safe_halt (arch/x86/kernel/paravirt.c:82) 
[ 15.023219][ C1] ? default_idle (./arch/x86/include/asm/paravirt.h:107 arch/x86/kernel/process.c:743) 
[ 15.023221][ C1] ? default_idle_call (./include/linux/cpuidle.h:143 kernel/sched/idle.c:118) 
[ 15.023224][ C1] ? cpuidle_idle_call (kernel/sched/idle.c:186) 
[ 15.023227][ C1] ? do_idle (kernel/sched/idle.c:325) 
[ 15.023229][ C1] ? cpu_startup_entry (kernel/sched/idle.c:422 (discriminator 1)) 
[ 15.023232][ C1] ? start_secondary (arch/x86/kernel/smpboot.c:203 arch/x86/kernel/smpboot.c:283) 
[ 15.023235][ C1] ? common_startup_64 (arch/x86/kernel/head_64.S:419) 
[ 15.023243][ C1] __put_net (net/core/net_namespace.c:732) 
[ 15.023246][ C1] __sk_destruct (./include/net/net_namespace.h:288 ./include/net/net_namespace.h:390 net/core/sock.c:2376) 
[ 15.023251][ C1] ? rcu_do_batch (kernel/rcu/tree.c:2576) 
[ 15.023253][ C1] rcu_do_batch (kernel/rcu/tree.c:2576) 
[ 15.023256][ C1] ? find_held_lock (kernel/locking/lockdep.c:5353) 
[ 15.023261][ C1] ? __pfx_rcu_do_batch (kernel/rcu/tree.c:2500) 
[ 15.023264][ C1] ? _raw_spin_unlock_irqrestore (./include/linux/spinlock_api_smp.h:151 kernel/locking/spinlock.c:194) 
[ 15.023268][ C1] ? lockdep_hardirqs_on (kernel/locking/lockdep.c:4475) 
[ 15.023271][ C1] ? _raw_spin_unlock_irqrestore (./arch/x86/include/asm/preempt.h:104 ./include/linux/spinlock_api_smp.h:152 kernel/locking/spinlock.c:194) 
[ 15.023276][ C1] rcu_core (kernel/rcu/tree.c:2834) 
[ 15.023280][ C1] handle_softirqs (kernel/softirq.c:579) 
[ 15.023285][ C1] __irq_exit_rcu (kernel/softirq.c:614 kernel/softirq.c:453 kernel/softirq.c:680) 
[ 15.023288][ C1] irq_exit_rcu (kernel/softirq.c:698) 
[ 15.023291][ C1] sysvec_apic_timer_interrupt (arch/x86/kernel/apic/apic.c:1050 arch/x86/kernel/apic/apic.c:1050) 
[   15.023294][    C1]  </IRQ>
[   15.023295][    C1]  <TASK>
[ 15.023297][ C1] asm_sysvec_apic_timer_interrupt (./arch/x86/include/asm/idtentry.h:702) 
[ 15.023300][ C1] RIP: 0010:pv_native_safe_halt (arch/x86/kernel/paravirt.c:82) 
[ 15.023304][ C1] Code: 92 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 37 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:	92                   	xchg   %eax,%edx
   1:	b5 00                	mov    $0x0,%ch
   3:	c3                   	ret
   4:	cc                   	int3
   5:	cc                   	int3
   6:	cc                   	int3
   7:	cc                   	int3
   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 83 37 10 00 	verw   0x103783(%rip)        # 0x1037ab
  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
[   15.023306][    C1] RSP: 0018:ffffc90000137de8 EFLAGS: 00000242
[   15.023309][    C1] RAX: 000000000007ac1f RBX: 1ffff92000026fc1 RCX: ffffffffaeb905d9
[   15.023311][    C1] RDX: 0000000000000000 RSI: ffffffffaf68f4e4 RDI: ffffffffaee53be0
[   15.023313][    C1] RBP: 0000000000000000 R08: 0000000000000001 R09: ffffed1006c166fa
[   15.023315][    C1] R10: ffff8880360b37d3 R11: ffffffffaf811288 R12: 0000000000000000
[   15.023317][    C1] R13: ffff888001bf0040 R14: dffffc0000000000 R15: 0000000000000000
[ 15.023321][ C1] ? ct_kernel_exit.constprop.0 (kernel/context_tracking.c:146) 
[ 15.023326][ C1] default_idle (./arch/x86/include/asm/paravirt.h:107 arch/x86/kernel/process.c:743) 
[ 15.023328][ C1] default_idle_call (./include/linux/cpuidle.h:143 kernel/sched/idle.c:118) 
[ 15.023331][ C1] cpuidle_idle_call (kernel/sched/idle.c:186) 
[ 15.023334][ C1] ? __pfx_cpuidle_idle_call (kernel/sched/idle.c:168) 
[ 15.023338][ C1] ? tsc_verify_tsc_adjust (arch/x86/kernel/tsc_sync.c:60) 
[ 15.023343][ C1] do_idle (kernel/sched/idle.c:325) 
[ 15.023346][ C1] cpu_startup_entry (kernel/sched/idle.c:422 (discriminator 1)) 
[ 15.023349][ C1] start_secondary (arch/x86/kernel/smpboot.c:203 arch/x86/kernel/smpboot.c:283) 
[ 15.023352][ C1] ? __pfx_start_secondary (arch/x86/kernel/smpboot.c:233) 
[ 15.023357][ C1] common_startup_64 (arch/x86/kernel/head_64.S:419) 
| [   15.039117][    C1] RCU nest depth: 0, expected: 0
| [   15.039289][    C1] INFO: lockdep is turned off.
| [   15.039463][    C1] Preemption disabled at:
| [ 15.039464][ C1] 0x0 
[   15.039781][    C1] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[   15.039782][    C1] Call Trace:
[   15.039784][    C1]  <IRQ>
[ 15.039786][ C1] dump_stack_lvl (lib/dump_stack.c:123) 
[ 15.039792][ C1] __might_resched (kernel/sched/core.c:8796) 
[ 15.039798][ C1] down_write (./include/linux/kernel.h:73 kernel/locking/rwsem.c:1576) 
[ 15.039802][ C1] ? __pfx_down_write (kernel/locking/rwsem.c:1575) 
[ 15.039805][ C1] ? simple_recursive_removal (fs/libfs.c:614) 
[ 15.039809][ C1] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:745) 
[ 15.039814][ C1] ? 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) 
[ 15.039819][ C1] simple_recursive_removal (./include/linux/dcache.h:409 ./include/linux/dcache.h:424 ./include/linux/dcache.h:434 fs/libfs.c:617) 
[ 15.039822][ C1] ? 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) 
[ 15.039825][ C1] ? __pfx_remove_one (fs/debugfs/inode.c:780) 
[ 15.039831][ C1] debugfs_remove (fs/debugfs/inode.c:806 fs/debugfs/inode.c:799) 
[ 15.039834][ C1] ref_tracker_dir_exit (lib/ref_tracker.c:412 lib/ref_tracker.c:196) 
[ 15.039839][ C1] ? __pfx_ref_tracker_free (lib/ref_tracker.c:254) 
[ 15.039842][ C1] ? __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) 
[ 15.039847][ C1] ? rcu_do_batch (kernel/rcu/tree.c:2576) 
[ 15.039850][ C1] ? __pfx_ref_tracker_dir_exit (lib/ref_tracker.c:190) 
[ 15.039853][ C1] ? irq_exit_rcu (kernel/softirq.c:698) 
[ 15.039857][ C1] ? sysvec_apic_timer_interrupt (arch/x86/kernel/apic/apic.c:1050 arch/x86/kernel/apic/apic.c:1050) 
[ 15.039861][ C1] ? asm_sysvec_apic_timer_interrupt (./arch/x86/include/asm/idtentry.h:702) 
[ 15.039865][ C1] ? pv_native_safe_halt (arch/x86/kernel/paravirt.c:82) 
[ 15.039868][ C1] ? default_idle (./arch/x86/include/asm/paravirt.h:107 arch/x86/kernel/process.c:743) 
[ 15.039871][ C1] ? default_idle_call (./include/linux/cpuidle.h:143 kernel/sched/idle.c:118) 
[ 15.039873][ C1] ? cpuidle_idle_call (kernel/sched/idle.c:186) 
[ 15.039876][ C1] ? do_idle (kernel/sched/idle.c:325) 
[ 15.039879][ C1] ? cpu_startup_entry (kernel/sched/idle.c:422 (discriminator 1)) 
[ 15.039881][ C1] ? start_secondary (arch/x86/kernel/smpboot.c:203 arch/x86/kernel/smpboot.c:283) 
[ 15.039884][ C1] ? common_startup_64 (arch/x86/kernel/head_64.S:419) 
[ 15.039891][ C1] __put_net (net/core/net_namespace.c:732) 
[ 15.039894][ C1] __sk_destruct (./include/net/net_namespace.h:288 ./include/net/net_namespace.h:390 net/core/sock.c:2376) 
[ 15.039898][ C1] ? rcu_do_batch (kernel/rcu/tree.c:2576) 
[ 15.039901][ C1] rcu_do_batch (kernel/rcu/tree.c:2576) 
[ 15.039904][ C1] ? find_held_lock (kernel/locking/lockdep.c:5353) 
[ 15.039909][ C1] ? __pfx_rcu_do_batch (kernel/rcu/tree.c:2500) 
[ 15.039913][ C1] ? _raw_spin_unlock_irqrestore (./include/linux/spinlock_api_smp.h:151 kernel/locking/spinlock.c:194) 
[ 15.039917][ C1] ? lockdep_hardirqs_on (kernel/locking/lockdep.c:4475) 
[ 15.039920][ C1] ? _raw_spin_unlock_irqrestore (./arch/x86/include/asm/preempt.h:104 ./include/linux/spinlock_api_smp.h:152 kernel/locking/spinlock.c:194) 
[ 15.039925][ C1] rcu_core (kernel/rcu/tree.c:2834) 
[ 15.039929][ C1] handle_softirqs (kernel/softirq.c:579) 
[ 15.039934][ C1] __irq_exit_rcu (kernel/softirq.c:614 kernel/softirq.c:453 kernel/softirq.c:680) 
[ 15.039937][ C1] irq_exit_rcu (kernel/softirq.c:698) 
[ 15.039940][ C1] sysvec_apic_timer_interrupt (arch/x86/kernel/apic/apic.c:1050 arch/x86/kernel/apic/apic.c:1050) 
[   15.039944][    C1]  </IRQ>
[   15.039945][    C1]  <TASK>
[ 15.039946][ C1] asm_sysvec_apic_timer_interrupt (./arch/x86/include/asm/idtentry.h:702) 
[ 15.039949][ C1] RIP: 0010:pv_native_safe_halt (arch/x86/kernel/paravirt.c:82) 
[ 15.039953][ C1] Code: 92 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 37 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:	92                   	xchg   %eax,%edx
   1:	b5 00                	mov    $0x0,%ch
   3:	c3                   	ret
   4:	cc                   	int3
   5:	cc                   	int3
   6:	cc                   	int3
   7:	cc                   	int3
   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 83 37 10 00 	verw   0x103783(%rip)        # 0x1037ab
  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
[   15.039956][    C1] RSP: 0018:ffffc90000137de8 EFLAGS: 00000242
[   15.039959][    C1] RAX: 000000000007ac1f RBX: 1ffff92000026fc1 RCX: ffffffffaeb905d9
[   15.039961][    C1] RDX: 0000000000000000 RSI: ffffffffaf68f4e4 RDI: ffffffffaee53be0
[   15.039962][    C1] RBP: 0000000000000000 R08: 0000000000000001 R09: ffffed1006c166fa
[   15.039964][    C1] R10: ffff8880360b37d3 R11: ffffffffaf811288 R12: 0000000000000000
[   15.039966][    C1] R13: ffff888001bf0040 R14: dffffc0000000000 R15: 0000000000000000
[ 15.039970][ C1] ? ct_kernel_exit.constprop.0 (kernel/context_tracking.c:146) 
[ 15.039974][ C1] default_idle (./arch/x86/include/asm/paravirt.h:107 arch/x86/kernel/process.c:743) 
[ 15.039977][ C1] default_idle_call (./include/linux/cpuidle.h:143 kernel/sched/idle.c:118) 
[ 15.039979][ C1] cpuidle_idle_call (kernel/sched/idle.c:186) 
[ 15.039982][ C1] ? __pfx_cpuidle_idle_call (kernel/sched/idle.c:168) 
[ 15.039986][ C1] ? tsc_verify_tsc_adjust (arch/x86/kernel/tsc_sync.c:60) 
[ 15.039990][ C1] do_idle (kernel/sched/idle.c:325) 
[ 15.039994][ C1] cpu_startup_entry (kernel/sched/idle.c:422 (discriminator 1)) 
[ 15.039997][ C1] start_secondary (arch/x86/kernel/smpboot.c:203 arch/x86/kernel/smpboot.c:283) 
[ 15.040000][ C1] ? __pfx_start_secondary (arch/x86/kernel/smpboot.c:233) 
[ 15.040004][ C1] common_startup_64 (arch/x86/kernel/head_64.S:419) 
| [   16.855610][    C2] INFO: lockdep is turned off.
| [   16.855816][    C2] Preemption disabled at:
| [ 16.855818][ C2] handle_softirqs (kernel/softirq.c:553) 
| [   16.856244][    C2] Tainted: [W]=WARN
[   16.856246][    C2] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[   16.856247][    C2] Call Trace:
[   16.856249][    C2]  <IRQ>
[ 16.856251][ C2] dump_stack_lvl (lib/dump_stack.c:123) 
[ 16.856259][ C2] __might_resched (kernel/sched/core.c:8796) 
[ 16.856265][ C2] down_write (./include/linux/kernel.h:73 kernel/locking/rwsem.c:1576) 
[ 16.856270][ C2] ? __pfx_down_write (kernel/locking/rwsem.c:1575) 
[ 16.856273][ C2] ? simple_recursive_removal (fs/libfs.c:614) 
[ 16.856277][ C2] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:745) 
[ 16.856282][ 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) 
[ 16.856288][ C2] simple_recursive_removal (./include/linux/dcache.h:409 ./include/linux/dcache.h:424 ./include/linux/dcache.h:434 fs/libfs.c:617) 
[ 16.856291][ 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) 
[ 16.856294][ C2] ? __pfx_remove_one (fs/debugfs/inode.c:780) 
[ 16.856300][ C2] debugfs_remove (fs/debugfs/inode.c:806 fs/debugfs/inode.c:799) 
[ 16.856303][ C2] ref_tracker_dir_exit (lib/ref_tracker.c:412 lib/ref_tracker.c:196) 
[ 16.856309][ C2] ? __pfx_ref_tracker_free (lib/ref_tracker.c:254) 
[ 16.856312][ 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) 
[ 16.856318][ C2] ? rcu_do_batch (kernel/rcu/tree.c:2576) 
[ 16.856321][ C2] ? __pfx_ref_tracker_dir_exit (lib/ref_tracker.c:190) 
[ 16.856325][ C2] ? irq_exit_rcu (kernel/softirq.c:698) 
[ 16.856328][ C2] ? sysvec_apic_timer_interrupt (arch/x86/kernel/apic/apic.c:1050 arch/x86/kernel/apic/apic.c:1050) 
[ 16.856333][ C2] ? asm_sysvec_apic_timer_interrupt (./arch/x86/include/asm/idtentry.h:702) 
[ 16.856336][ C2] ? get_stack_info (arch/x86/kernel/dumpstack_64.c:196 (discriminator 4)) 
[ 16.856341][ C2] ? __unwind_start (arch/x86/kernel/unwind_orc.c:727) 
[ 16.856344][ C2] ? arch_stack_walk (arch/x86/kernel/stacktrace.c:24) 
[ 16.856349][ C2] ? stack_trace_save (kernel/stacktrace.c:123) 
[ 16.856352][ C2] ? kasan_save_stack (mm/kasan/common.c:48) 
[ 16.856357][ C2] ? kasan_record_aux_stack (mm/kasan/generic.c:548) 
[ 16.856361][ C2] ? kmem_cache_free (mm/slub.c:2343 mm/slub.c:4642 mm/slub.c:4744) 
[ 16.856365][ C2] ? exit_mmap (mm/mmap.c:1311) 
[ 16.856371][ C2] ? bpf_sk_storage_free (./include/linux/rcupdate.h:341 ./include/linux/rcupdate.h:871 net/core/bpf_sk_storage.c:61) 
[ 16.856375][ C2] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:745) 
[ 16.856379][ C2] __put_net (net/core/net_namespace.c:732) 
[ 16.856383][ C2] __sk_destruct (./include/net/net_namespace.h:288 ./include/net/net_namespace.h:390 net/core/sock.c:2376) 
[ 16.856387][ C2] ? rcu_do_batch (kernel/rcu/tree.c:2576) 
[ 16.856390][ C2] rcu_do_batch (kernel/rcu/tree.c:2576) 
[ 16.856394][ C2] ? __pfx_rcu_do_batch (kernel/rcu/tree.c:2500) 
[ 16.856398][ C2] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:745) 
[ 16.856401][ C2] ? trace_irq_enable.constprop.0 (./include/trace/events/preemptirq.h:40) 
[ 16.856408][ C2] rcu_core (kernel/rcu/tree.c:2834) 
[ 16.856413][ C2] handle_softirqs (kernel/softirq.c:579) 
[ 16.856418][ C2] __irq_exit_rcu (kernel/softirq.c:614 kernel/softirq.c:453 kernel/softirq.c:680) 
[ 16.856421][ C2] irq_exit_rcu (kernel/softirq.c:698) 
[ 16.856424][ C2] sysvec_apic_timer_interrupt (arch/x86/kernel/apic/apic.c:1050 arch/x86/kernel/apic/apic.c:1050) 
[   16.856427][    C2]  </IRQ>
[   16.856429][    C2]  <TASK>
[ 16.856430][ C2] asm_sysvec_apic_timer_interrupt (./arch/x86/include/asm/idtentry.h:702) 
[ 16.856433][ C2] RIP: 0010:get_stack_info (arch/x86/kernel/dumpstack_64.c:196 (discriminator 4)) 
[ 16.856436][ C2] Code: 90 90 90 90 90 66 0f 1f 00 0f 1f 44 00 00 41 55 49 89 d5 41 54 55 48 89 cd 53 65 48 8b 1d 7b ed 3b 05 48 85 f6 74 03 48 89 f3 <48> 85 ff 74 7c 4c 89 ea 48 89 de e8 db 34 a2 02 84 c0 74 6d 31 c0
All code
========
   0:	90                   	nop
   1:	90                   	nop
   2:	90                   	nop
   3:	90                   	nop
   4:	90                   	nop
   5:	66 0f 1f 00          	nopw   (%rax)
   9:	0f 1f 44 00 00       	nopl   0x0(%rax,%rax,1)
   e:	41 55                	push   %r13
  10:	49 89 d5             	mov    %rdx,%r13
  13:	41 54                	push   %r12
  15:	55                   	push   %rbp
  16:	48 89 cd             	mov    %rcx,%rbp
  19:	53                   	push   %rbx
  1a:	65 48 8b 1d 7b ed 3b 	mov    %gs:0x53bed7b(%rip),%rbx        # 0x53bed9d
  21:	05 
  22:	48 85 f6             	test   %rsi,%rsi
  25:	74 03                	je     0x2a
  27:	48 89 f3             	mov    %rsi,%rbx
  2a:*	48 85 ff             	test   %rdi,%rdi		<-- trapping instruction
  2d:	74 7c                	je     0xab
  2f:	4c 89 ea             	mov    %r13,%rdx
  32:	48 89 de             	mov    %rbx,%rsi
  35:	e8 db 34 a2 02       	call   0x2a23515
  3a:	84 c0                	test   %al,%al
  3c:	74 6d                	je     0xab
  3e:	31 c0                	xor    %eax,%eax

Code starting with the faulting instruction
===========================================
   0:	48 85 ff             	test   %rdi,%rdi
   3:	74 7c                	je     0x81
   5:	4c 89 ea             	mov    %r13,%rdx
   8:	48 89 de             	mov    %rbx,%rsi
   b:	e8 db 34 a2 02       	call   0x2a234eb
  10:	84 c0                	test   %al,%al
  12:	74 6d                	je     0x81
  14:	31 c0                	xor    %eax,%eax
[   16.856439][    C2] RSP: 0018:ffffc90000aa7860 EFLAGS: 00000286
[   16.856443][    C2] RAX: dffffc0000000000 RBX: ffff88800b7945c0 RCX: ffffc90000aa78f8
[   16.856445][    C2] RDX: ffffc90000aa78d8 RSI: ffff88800b7945c0 RDI: ffffc90000aa7888
[   16.856447][    C2] RBP: ffffc90000aa78f8 R08: 00000000000001c0 R09: 0000000000000000
[   16.856449][    C2] R10: ffffc90000aa78d8 R11: ffffc90000aa78f8 R12: ffffc90000aa7888
[   16.856450][    C2] R13: ffffc90000aa78d8 R14: ffffc90000aa78d8 R15: ffffc90000aa7900
[ 16.856457][ C2] __unwind_start (arch/x86/kernel/unwind_orc.c:727) 
[ 16.856461][ C2] ? unwind_get_return_address (arch/x86/kernel/unwind_orc.c:369 arch/x86/kernel/unwind_orc.c:364) 
[ 16.856463][ C2] ? __pfx_stack_trace_consume_entry (kernel/stacktrace.c:83) 
[ 16.856466][ C2] arch_stack_walk (arch/x86/kernel/stacktrace.c:24) 
[ 16.856472][ C2] ? __unwind_start (arch/x86/kernel/unwind_orc.c:712) 
[ 16.856476][ C2] stack_trace_save (kernel/stacktrace.c:123) 
[ 16.856478][ C2] ? __pfx_stack_trace_save (kernel/stacktrace.c:114) 
[ 16.856482][ C2] ? kasan_save_stack (mm/kasan/common.c:49) 
[ 16.856485][ C2] ? kasan_save_stack (mm/kasan/common.c:48) 
[ 16.856491][ C2] kasan_save_stack (mm/kasan/common.c:48) 
[ 16.856494][ C2] ? exit_mmap (mm/mmap.c:1311) 
[ 16.856497][ C2] ? mmput (kernel/fork.c:1449 kernel/fork.c:1383 kernel/fork.c:1404) 
[ 16.856501][ C2] ? exit_mm (kernel/exit.c:596) 
[ 16.856505][ C2] ? do_exit (kernel/exit.c:950) 
[ 16.856507][ C2] ? do_group_exit (kernel/exit.c:1089) 
[ 16.856511][ C2] ? __x64_sys_exit_group (kernel/exit.c:1117) 
[ 16.856514][ C2] ? x64_sys_call (arch/x86/entry/syscall_64.c:37) 
[ 16.856519][ C2] ? do_syscall_64 (arch/x86/entry/syscall_64.c:63 arch/x86/entry/syscall_64.c:94) 
[ 16.856522][ C2] ? entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:130) 
[ 16.856524][ C2] ? stack_trace_save (kernel/stacktrace.c:123) 
[ 16.856527][ C2] ? stack_depot_save_flags (lib/stackdepot.c:552 lib/stackdepot.c:619) 
[ 16.856533][ 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) 
[ 16.856536][ C2] ? __pfx_do_raw_spin_lock (kernel/locking/spinlock_debug.c:114) 
[ 16.856540][ C2] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:745) 
[ 16.856543][ C2] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:745) 
[ 16.856547][ C2] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:745) 
[ 16.856549][ 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) 
[ 16.856553][ C2] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:745) 
[ 16.856556][ C2] ? trace_lock_release (./include/trace/events/lock.h:69 (discriminator 21)) 
[ 16.856561][ C2] ? lock_release (kernel/locking/lockdep.c:118 kernel/locking/lockdep.c:5884) 
[ 16.856564][ 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) 
[ 16.856568][ C2] kasan_record_aux_stack (mm/kasan/generic.c:548) 
[ 16.856571][ C2] kmem_cache_free (mm/slub.c:2343 mm/slub.c:4642 mm/slub.c:4744) 
[ 16.856575][ C2] ? exit_mmap (mm/mmap.c:1311) 
[ 16.856580][ C2] exit_mmap (mm/mmap.c:1311) 
[ 16.856584][ C2] ? __pfx_exit_mmap (mm/mmap.c:1259) 
[ 16.856587][ C2] ? __mutex_lock (./arch/x86/include/asm/preempt.h:104 kernel/locking/mutex.c:727 kernel/locking/mutex.c:746) 
[ 16.856592][ C2] ? lock_release (kernel/locking/lockdep.c:118 kernel/locking/lockdep.c:5884) 
[ 16.856595][ 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) 
[ 16.856603][ C2] mmput (kernel/fork.c:1449 kernel/fork.c:1383 kernel/fork.c:1404) 
[ 16.856607][ C2] exit_mm (kernel/exit.c:596) 
[ 16.856611][ C2] do_exit (kernel/exit.c:950) 
[ 16.856615][ C2] do_group_exit (kernel/exit.c:1089) 
[ 16.856620][ C2] __x64_sys_exit_group (kernel/exit.c:1117) 
[ 16.856623][ C2] x64_sys_call (arch/x86/entry/syscall_64.c:37) 
[ 16.856626][ C2] do_syscall_64 (arch/x86/entry/syscall_64.c:63 arch/x86/entry/syscall_64.c:94) 
[ 16.856630][ C2] entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:130) 
[   16.856632][    C2] RIP: 0033:0x7ff1f2386abd
[ 16.856635][ C2] Code: Unable to access opcode bytes at 0x7ff1f2386a93.

Code starting with the faulting instruction
===========================================
[   16.856636][    C2] RSP: 002b:00007fff44db8a08 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7
[   16.856639][    C2] RAX: ffffffffffffffda RBX: 00007ff1f24639c0 RCX: 00007ff1f2386abd
[   16.856641][    C2] RDX: 00000000000000e7 RSI: ffffffffffffff80 RDI: 0000000000000000
[   16.856643][    C2] RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000020
[   16.856644][    C2] R10: 00007fff44db88b0 R11: 0000000000000246 R12: 00007ff1f24639c0


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