======================================
| [   15.156118][    C2] 1 lock held by swapper/2/0:
| [ 15.156310][ C2] #0: ffffffff95b774c0 (rcu_callback){....}-{0:0}, at: rcu_do_batch (./include/linux/rcupdate.h:331 kernel/rcu/tree.c:2570) 
| [   15.156648][    C2]
| [   15.156648][    C2] stack backtrace:
[   15.156887][    C2] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[   15.156889][    C2] Call Trace:
[   15.156891][    C2]  <IRQ>
[ 15.156893][ C2] dump_stack_lvl (lib/dump_stack.c:123) 
[ 15.156900][ C2] print_usage_bug.part.0 (kernel/locking/lockdep.c:4048) 
[ 15.156905][ C2] mark_lock_irq (kernel/locking/lockdep.c:4013 kernel/locking/lockdep.c:4059 kernel/locking/lockdep.c:4270) 
[ 15.156909][ C2] ? __pfx_unwind_next_frame (arch/x86/kernel/unwind_orc.c:469) 
[ 15.156913][ C2] ? save_trace (kernel/locking/lockdep.c:595) 
[ 15.156920][ C2] mark_lock (kernel/locking/lockdep.c:4756) 
[ 15.156924][ C2] mark_usage (kernel/locking/lockdep.c:4645) 
[ 15.156927][ C2] __lock_acquire (kernel/locking/lockdep.c:5194) 
[ 15.156930][ C2] ? __lock_acquire (kernel/locking/lockdep.c:5240) 
[ 15.156934][ C2] lock_acquire.part.0 (kernel/locking/lockdep.c:473 kernel/locking/lockdep.c:5873) 
[ 15.156937][ C2] ? simple_pin_fs (fs/libfs.c:1067) 
[ 15.156941][ C2] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:745) 
[ 15.156945][ C2] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5834) 
[ 15.156947][ C2] ? simple_pin_fs (fs/libfs.c:1067) 
[ 15.156952][ C2] _raw_spin_lock (./include/linux/spinlock_api_smp.h:134 kernel/locking/spinlock.c:154) 
[ 15.156955][ C2] ? simple_pin_fs (fs/libfs.c:1067) 
[ 15.156958][ C2] simple_pin_fs (fs/libfs.c:1067) 
[ 15.156963][ C2] debugfs_remove (fs/debugfs/inode.c:805 fs/debugfs/inode.c:799) 
[ 15.156966][ C2] ref_tracker_dir_exit (lib/ref_tracker.c:411 lib/ref_tracker.c:195) 
[ 15.156972][ C2] ? __pfx_ref_tracker_free (lib/ref_tracker.c:253) 
[ 15.156975][ 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) 
[ 15.156981][ C2] ? rcu_do_batch (kernel/rcu/tree.c:2576) 
[ 15.156984][ C2] ? __pfx_ref_tracker_dir_exit (lib/ref_tracker.c:189) 
[ 15.156987][ C2] ? irq_exit_rcu (kernel/softirq.c:698) 
[ 15.156989][ C2] ? sysvec_apic_timer_interrupt (arch/x86/kernel/apic/apic.c:1050 arch/x86/kernel/apic/apic.c:1050) 
[ 15.156994][ C2] ? asm_sysvec_apic_timer_interrupt (./arch/x86/include/asm/idtentry.h:702) 
[ 15.156998][ C2] ? pv_native_safe_halt (arch/x86/kernel/paravirt.c:82) 
[ 15.157001][ C2] ? default_idle (./arch/x86/include/asm/paravirt.h:107 arch/x86/kernel/process.c:743) 
[ 15.157004][ C2] ? default_idle_call (./include/linux/cpuidle.h:143 kernel/sched/idle.c:118) 
[ 15.157006][ C2] ? cpuidle_idle_call (kernel/sched/idle.c:186) 
[ 15.157010][ C2] ? do_idle (kernel/sched/idle.c:325) 
[ 15.157012][ C2] ? cpu_startup_entry (kernel/sched/idle.c:422 (discriminator 1)) 
[ 15.157014][ C2] ? start_secondary (arch/x86/kernel/smpboot.c:203 arch/x86/kernel/smpboot.c:283) 
[ 15.157018][ C2] ? common_startup_64 (arch/x86/kernel/head_64.S:419) 
[ 15.157025][ C2] __put_net (net/core/net_namespace.c:732) 
[ 15.157029][ C2] __sk_destruct (./include/net/net_namespace.h:288 ./include/net/net_namespace.h:390 net/core/sock.c:2376) 
[ 15.157034][ C2] ? rcu_do_batch (kernel/rcu/tree.c:2576) 
[ 15.157036][ C2] rcu_do_batch (kernel/rcu/tree.c:2576) 
[ 15.157039][ C2] ? find_held_lock (kernel/locking/lockdep.c:5353) 
[ 15.157043][ C2] ? __pfx_rcu_do_batch (kernel/rcu/tree.c:2500) 
[ 15.157047][ C2] ? _raw_spin_unlock_irqrestore (./include/linux/spinlock_api_smp.h:151 kernel/locking/spinlock.c:194) 
[ 15.157050][ C2] ? lockdep_hardirqs_on (kernel/locking/lockdep.c:4475) 
[ 15.157053][ C2] ? _raw_spin_unlock_irqrestore (./arch/x86/include/asm/preempt.h:104 ./include/linux/spinlock_api_smp.h:152 kernel/locking/spinlock.c:194) 
[ 15.157058][ C2] rcu_core (kernel/rcu/tree.c:2834) 
[ 15.157062][ C2] handle_softirqs (kernel/softirq.c:579) 
[ 15.157067][ C2] __irq_exit_rcu (kernel/softirq.c:614 kernel/softirq.c:453 kernel/softirq.c:680) 
[ 15.157070][ C2] irq_exit_rcu (kernel/softirq.c:698) 
[ 15.157073][ C2] sysvec_apic_timer_interrupt (arch/x86/kernel/apic/apic.c:1050 arch/x86/kernel/apic/apic.c:1050) 
[   15.157077][    C2]  </IRQ>
[   15.157078][    C2]  <TASK>
[ 15.157079][ C2] asm_sysvec_apic_timer_interrupt (./arch/x86/include/asm/idtentry.h:702) 
[ 15.157082][ C2] RIP: 0010:pv_native_safe_halt (arch/x86/kernel/paravirt.c:82) 
[ 15.157086][ 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
[   15.157089][    C2] RSP: 0018:ffffc90000147de8 EFLAGS: 00000242
[   15.157092][    C2] RAX: 000000000004a16d RBX: 1ffff92000028fc1 RCX: ffffffff94b8f5d9
[   15.157094][    C2] RDX: 0000000000000000 RSI: ffffffff9568f4e4 RDI: ffffffff94e53be0
[   15.157096][    C2] RBP: 0000000000000000 R08: 0000000000000001 R09: ffffed1006c266fa
[   15.157098][    C2] R10: ffff8880361337d3 R11: ffffffff95811288 R12: 0000000000000000
[   15.157099][    C2] R13: ffff888001bf2300 R14: dffffc0000000000 R15: 0000000000000000
[ 15.157103][ C2] ? ct_kernel_exit.constprop.0 (kernel/context_tracking.c:146) 
[ 15.157108][ C2] default_idle (./arch/x86/include/asm/paravirt.h:107 arch/x86/kernel/process.c:743) 
[ 15.157111][ C2] default_idle_call (./include/linux/cpuidle.h:143 kernel/sched/idle.c:118) 
[ 15.157113][ C2] cpuidle_idle_call (kernel/sched/idle.c:186) 
[ 15.157116][ C2] ? __pfx_cpuidle_idle_call (kernel/sched/idle.c:168) 
[ 15.157120][ C2] ? tsc_verify_tsc_adjust (arch/x86/kernel/tsc_sync.c:60) 
[ 15.157125][ C2] do_idle (kernel/sched/idle.c:325) 
[ 15.157128][ C2] cpu_startup_entry (kernel/sched/idle.c:422 (discriminator 1)) 
[ 15.157131][ C2] start_secondary (arch/x86/kernel/smpboot.c:203 arch/x86/kernel/smpboot.c:283) 
[ 15.157134][ C2] ? __pfx_start_secondary (arch/x86/kernel/smpboot.c:233) 
[ 15.157138][ C2] common_startup_64 (arch/x86/kernel/head_64.S:419) 
| [   15.173516][    C2] RCU nest depth: 0, expected: 0
| [   15.173711][    C2] INFO: lockdep is turned off.
| [   15.173908][    C2] Preemption disabled at:
| [ 15.173910][ C2] 0x0 
[   15.174358][    C2] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[   15.174359][    C2] Call Trace:
[   15.174361][    C2]  <IRQ>
[ 15.174363][ C2] dump_stack_lvl (lib/dump_stack.c:123) 
[ 15.174369][ C2] __might_resched (kernel/sched/core.c:8796) 
[ 15.174376][ C2] down_write (./include/linux/kernel.h:73 kernel/locking/rwsem.c:1576) 
[ 15.174381][ C2] ? __pfx_down_write (kernel/locking/rwsem.c:1575) 
[ 15.174384][ C2] ? simple_recursive_removal (fs/libfs.c:614) 
[ 15.174387][ C2] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:745) 
[ 15.174391][ 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) 
[ 15.174397][ C2] simple_recursive_removal (./include/linux/dcache.h:409 ./include/linux/dcache.h:424 ./include/linux/dcache.h:434 fs/libfs.c:617) 
[ 15.174400][ 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) 
[ 15.174403][ C2] ? __pfx_remove_one (fs/debugfs/inode.c:780) 
[ 15.174408][ C2] debugfs_remove (fs/debugfs/inode.c:806 fs/debugfs/inode.c:799) 
[ 15.174411][ C2] ref_tracker_dir_exit (lib/ref_tracker.c:411 lib/ref_tracker.c:195) 
[ 15.174416][ C2] ? __pfx_ref_tracker_free (lib/ref_tracker.c:253) 
[ 15.174419][ 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) 
[ 15.174424][ C2] ? rcu_do_batch (kernel/rcu/tree.c:2576) 
[ 15.174427][ C2] ? __pfx_ref_tracker_dir_exit (lib/ref_tracker.c:189) 
[ 15.174430][ C2] ? irq_exit_rcu (kernel/softirq.c:698) 
[ 15.174434][ C2] ? sysvec_apic_timer_interrupt (arch/x86/kernel/apic/apic.c:1050 arch/x86/kernel/apic/apic.c:1050) 
[ 15.174439][ C2] ? asm_sysvec_apic_timer_interrupt (./arch/x86/include/asm/idtentry.h:702) 
[ 15.174442][ C2] ? pv_native_safe_halt (arch/x86/kernel/paravirt.c:82) 
[ 15.174445][ C2] ? default_idle (./arch/x86/include/asm/paravirt.h:107 arch/x86/kernel/process.c:743) 
[ 15.174448][ C2] ? default_idle_call (./include/linux/cpuidle.h:143 kernel/sched/idle.c:118) 
[ 15.174451][ C2] ? cpuidle_idle_call (kernel/sched/idle.c:186) 
[ 15.174454][ C2] ? do_idle (kernel/sched/idle.c:325) 
[ 15.174456][ C2] ? cpu_startup_entry (kernel/sched/idle.c:422 (discriminator 1)) 
[ 15.174459][ C2] ? start_secondary (arch/x86/kernel/smpboot.c:203 arch/x86/kernel/smpboot.c:283) 
[ 15.174462][ C2] ? common_startup_64 (arch/x86/kernel/head_64.S:419) 
[ 15.174469][ C2] __put_net (net/core/net_namespace.c:732) 
[ 15.174472][ C2] __sk_destruct (./include/net/net_namespace.h:288 ./include/net/net_namespace.h:390 net/core/sock.c:2376) 
[ 15.174476][ C2] ? rcu_do_batch (kernel/rcu/tree.c:2576) 
[ 15.174478][ C2] rcu_do_batch (kernel/rcu/tree.c:2576) 
[ 15.174482][ C2] ? find_held_lock (kernel/locking/lockdep.c:5353) 
[ 15.174487][ C2] ? __pfx_rcu_do_batch (kernel/rcu/tree.c:2500) 
[ 15.174490][ C2] ? _raw_spin_unlock_irqrestore (./include/linux/spinlock_api_smp.h:151 kernel/locking/spinlock.c:194) 
[ 15.174495][ C2] ? lockdep_hardirqs_on (kernel/locking/lockdep.c:4475) 
[ 15.174497][ C2] ? _raw_spin_unlock_irqrestore (./arch/x86/include/asm/preempt.h:104 ./include/linux/spinlock_api_smp.h:152 kernel/locking/spinlock.c:194) 
[ 15.174502][ C2] rcu_core (kernel/rcu/tree.c:2834) 
[ 15.174506][ C2] handle_softirqs (kernel/softirq.c:579) 
[ 15.174512][ C2] __irq_exit_rcu (kernel/softirq.c:614 kernel/softirq.c:453 kernel/softirq.c:680) 
[ 15.174515][ C2] irq_exit_rcu (kernel/softirq.c:698) 
[ 15.174517][ C2] sysvec_apic_timer_interrupt (arch/x86/kernel/apic/apic.c:1050 arch/x86/kernel/apic/apic.c:1050) 
[   15.174521][    C2]  </IRQ>
[   15.174522][    C2]  <TASK>
[ 15.174524][ C2] asm_sysvec_apic_timer_interrupt (./arch/x86/include/asm/idtentry.h:702) 
[ 15.174526][ C2] RIP: 0010:pv_native_safe_halt (arch/x86/kernel/paravirt.c:82) 
[ 15.174530][ 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
[   15.174532][    C2] RSP: 0018:ffffc90000147de8 EFLAGS: 00000242
[   15.174535][    C2] RAX: 000000000004a16d RBX: 1ffff92000028fc1 RCX: ffffffff94b8f5d9
[   15.174537][    C2] RDX: 0000000000000000 RSI: ffffffff9568f4e4 RDI: ffffffff94e53be0
[   15.174539][    C2] RBP: 0000000000000000 R08: 0000000000000001 R09: ffffed1006c266fa
[   15.174540][    C2] R10: ffff8880361337d3 R11: ffffffff95811288 R12: 0000000000000000
[   15.174542][    C2] R13: ffff888001bf2300 R14: dffffc0000000000 R15: 0000000000000000
[ 15.174546][ C2] ? ct_kernel_exit.constprop.0 (kernel/context_tracking.c:146) 
[ 15.174551][ C2] default_idle (./arch/x86/include/asm/paravirt.h:107 arch/x86/kernel/process.c:743) 
[ 15.174553][ C2] default_idle_call (./include/linux/cpuidle.h:143 kernel/sched/idle.c:118) 
[ 15.174556][ C2] cpuidle_idle_call (kernel/sched/idle.c:186) 
[ 15.174559][ C2] ? __pfx_cpuidle_idle_call (kernel/sched/idle.c:168) 
[ 15.174562][ C2] ? tsc_verify_tsc_adjust (arch/x86/kernel/tsc_sync.c:60) 
[ 15.174567][ C2] do_idle (kernel/sched/idle.c:325) 
[ 15.174570][ C2] cpu_startup_entry (kernel/sched/idle.c:422 (discriminator 1)) 
[ 15.174573][ C2] start_secondary (arch/x86/kernel/smpboot.c:203 arch/x86/kernel/smpboot.c:283) 
[ 15.174576][ C2] ? __pfx_start_secondary (arch/x86/kernel/smpboot.c:233) 
[ 15.174580][ C2] common_startup_64 (arch/x86/kernel/head_64.S:419) 
| [   16.946792][    C1] INFO: lockdep is turned off.
| [   16.946948][    C1] Preemption disabled at:
| [ 16.946950][ C1] handle_softirqs (kernel/softirq.c:553) 
| [   16.947279][    C1] Tainted: [W]=WARN
[   16.947281][    C1] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[   16.947283][    C1] Call Trace:
[   16.947284][    C1]  <TASK>
[ 16.947287][ C1] dump_stack_lvl (lib/dump_stack.c:123) 
[ 16.947294][ C1] __might_resched (kernel/sched/core.c:8796) 
[ 16.947301][ C1] down_write (./include/linux/kernel.h:73 kernel/locking/rwsem.c:1576) 
[ 16.947305][ C1] ? __pfx_down_write (kernel/locking/rwsem.c:1575) 
[ 16.947308][ C1] ? simple_recursive_removal (fs/libfs.c:614) 
[ 16.947313][ C1] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:745) 
[ 16.947318][ 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) 
[ 16.947324][ C1] simple_recursive_removal (./include/linux/dcache.h:409 ./include/linux/dcache.h:424 ./include/linux/dcache.h:434 fs/libfs.c:617) 
[ 16.947327][ 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) 
[ 16.947330][ C1] ? __pfx_remove_one (fs/debugfs/inode.c:780) 
[ 16.947336][ C1] debugfs_remove (fs/debugfs/inode.c:806 fs/debugfs/inode.c:799) 
[ 16.947339][ C1] ref_tracker_dir_exit (lib/ref_tracker.c:411 lib/ref_tracker.c:195) 
[ 16.947345][ C1] ? __pfx_ref_tracker_free (lib/ref_tracker.c:253) 
[ 16.947349][ 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) 
[ 16.947354][ C1] ? rcu_do_batch (kernel/rcu/tree.c:2576) 
[ 16.947358][ C1] ? __pfx_ref_tracker_dir_exit (lib/ref_tracker.c:189) 
[ 16.947361][ C1] ? smpboot_thread_fn (kernel/smpboot.c:164 (discriminator 3)) 
[ 16.947365][ C1] ? kthread (kernel/kthread.c:464) 
[ 16.947368][ C1] ? ret_from_fork (arch/x86/kernel/process.c:148) 
[ 16.947372][ C1] ? ret_from_fork_asm (arch/x86/entry/entry_64.S:258) 
[ 16.947377][ C1] ? migrate_enable (./arch/x86/include/asm/preempt.h:104 ./include/linux/preempt.h:481 ./include/linux/preempt.h:481 kernel/sched/core.c:2427) 
[ 16.947381][ C1] ? __pfx_migrate_enable (kernel/sched/core.c:2402) 
[ 16.947384][ C1] ? bpf_sk_storage_free (./include/linux/rcupdate.h:341 ./include/linux/rcupdate.h:871 net/core/bpf_sk_storage.c:61) 
[ 16.947388][ C1] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:745) 
[ 16.947392][ C1] __put_net (net/core/net_namespace.c:732) 
[ 16.947396][ C1] __sk_destruct (./include/net/net_namespace.h:288 ./include/net/net_namespace.h:390 net/core/sock.c:2376) 
[ 16.947400][ C1] ? rcu_do_batch (kernel/rcu/tree.c:2576) 
[ 16.947402][ C1] rcu_do_batch (kernel/rcu/tree.c:2576) 
[ 16.947407][ C1] ? __pfx_rcu_do_batch (kernel/rcu/tree.c:2500) 
[ 16.947410][ C1] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:745) 
[ 16.947413][ C1] ? trace_irq_enable.constprop.0 (./include/trace/events/preemptirq.h:40) 
[ 16.947420][ C1] rcu_core (kernel/rcu/tree.c:2834) 
[ 16.947425][ C1] handle_softirqs (kernel/softirq.c:579) 
[ 16.947429][ C1] ? __pfx_run_ksoftirqd (kernel/softirq.c:961) 
[ 16.947433][ C1] run_ksoftirqd (kernel/softirq.c:436 kernel/softirq.c:969 kernel/softirq.c:960) 
[ 16.947436][ C1] smpboot_thread_fn (kernel/smpboot.c:164 (discriminator 3)) 
[ 16.947439][ C1] ? __pfx_smpboot_thread_fn (kernel/smpboot.c:107) 
[ 16.947443][ C1] kthread (kernel/kthread.c:464) 
[ 16.947446][ C1] ? __pfx_kthread (kernel/kthread.c:413) 
[ 16.947448][ C1] ? ret_from_fork (arch/x86/kernel/process.c:147) 
[ 16.947451][ C1] ? __lock_release (kernel/locking/lockdep.c:5539) 
[ 16.947454][ C1] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:745) 
[ 16.947457][ C1] ? __pfx_kthread (kernel/kthread.c:413) 
[ 16.947460][ C1] ret_from_fork (arch/x86/kernel/process.c:148) 
[ 16.947463][ C1] ? __pfx_kthread (kernel/kthread.c:413) 


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