======================================
| [   19.748112][    C3] 1 lock held by swapper/3/0:
| [ 19.748444][ C3] #0: ffffffffb5f774c0 (rcu_callback){....}-{0:0}, at: rcu_do_batch (./include/linux/rcupdate.h:331 kernel/rcu/tree.c:2570) 
| [   19.749029][    C3]
| [   19.749029][    C3] stack backtrace:
[   19.749439][    C3] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[   19.749442][    C3] Call Trace:
[   19.749445][    C3]  <IRQ>
[ 19.749449][ C3] dump_stack_lvl (lib/dump_stack.c:123) 
[ 19.749459][ C3] print_usage_bug.part.0 (kernel/locking/lockdep.c:4048) 
[ 19.749467][ C3] mark_lock_irq (kernel/locking/lockdep.c:4013 kernel/locking/lockdep.c:4059 kernel/locking/lockdep.c:4270) 
[ 19.749474][ C3] ? __pfx_unwind_next_frame (arch/x86/kernel/unwind_orc.c:469) 
[ 19.749481][ C3] ? save_trace (kernel/locking/lockdep.c:595) 
[ 19.749489][ C3] mark_lock (kernel/locking/lockdep.c:4756) 
[ 19.749495][ C3] mark_usage (kernel/locking/lockdep.c:4645) 
[ 19.749500][ C3] __lock_acquire (kernel/locking/lockdep.c:5194) 
[ 19.749506][ C3] ? __lock_acquire (kernel/locking/lockdep.c:5240) 
[ 19.749513][ C3] lock_acquire.part.0 (kernel/locking/lockdep.c:473 kernel/locking/lockdep.c:5873) 
[ 19.749518][ C3] ? simple_pin_fs (fs/libfs.c:1067) 
[ 19.749525][ C3] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:745) 
[ 19.749530][ C3] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5834) 
[ 19.749533][ C3] ? simple_pin_fs (fs/libfs.c:1067) 
[ 19.749540][ C3] _raw_spin_lock (./include/linux/spinlock_api_smp.h:134 kernel/locking/spinlock.c:154) 
[ 19.749546][ C3] ? simple_pin_fs (fs/libfs.c:1067) 
[ 19.749551][ C3] simple_pin_fs (fs/libfs.c:1067) 
[ 19.749558][ C3] debugfs_remove (fs/debugfs/inode.c:805 fs/debugfs/inode.c:799) 
[ 19.749565][ C3] ref_tracker_dir_exit (lib/ref_tracker.c:412 lib/ref_tracker.c:196) 
[ 19.749573][ C3] ? __pfx_ref_tracker_free (lib/ref_tracker.c:254) 
[ 19.749578][ 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) 
[ 19.749584][ C3] ? rcu_do_batch (kernel/rcu/tree.c:2576) 
[ 19.749589][ C3] ? __pfx_ref_tracker_dir_exit (lib/ref_tracker.c:190) 
[ 19.749594][ C3] ? irq_exit_rcu (kernel/softirq.c:698) 
[ 19.749599][ C3] ? sysvec_apic_timer_interrupt (arch/x86/kernel/apic/apic.c:1050 arch/x86/kernel/apic/apic.c:1050) 
[ 19.749605][ C3] ? asm_sysvec_apic_timer_interrupt (./arch/x86/include/asm/idtentry.h:702) 
[ 19.749610][ C3] ? pv_native_safe_halt (arch/x86/kernel/paravirt.c:82) 
[ 19.749614][ C3] ? default_idle (./arch/x86/include/asm/paravirt.h:107 arch/x86/kernel/process.c:743) 
[ 19.749617][ C3] ? default_idle_call (./include/linux/cpuidle.h:143 kernel/sched/idle.c:118) 
[ 19.749621][ C3] ? cpuidle_idle_call (kernel/sched/idle.c:186) 
[ 19.749625][ C3] ? do_idle (kernel/sched/idle.c:325) 
[ 19.749628][ C3] ? cpu_startup_entry (kernel/sched/idle.c:422 (discriminator 1)) 
[ 19.749631][ C3] ? start_secondary (arch/x86/kernel/smpboot.c:203 arch/x86/kernel/smpboot.c:283) 
[ 19.749636][ C3] ? common_startup_64 (arch/x86/kernel/head_64.S:419) 
[ 19.749645][ C3] __put_net (net/core/net_namespace.c:732) 
[ 19.749650][ C3] __sk_destruct (./include/net/net_namespace.h:288 ./include/net/net_namespace.h:390 net/core/sock.c:2376) 
[ 19.749656][ C3] ? rcu_do_batch (kernel/rcu/tree.c:2576) 
[ 19.749660][ C3] rcu_do_batch (kernel/rcu/tree.c:2576) 
[ 19.749665][ C3] ? find_held_lock (kernel/locking/lockdep.c:5353) 
[ 19.749673][ C3] ? __pfx_rcu_do_batch (kernel/rcu/tree.c:2500) 
[ 19.749677][ C3] ? _raw_spin_unlock_irqrestore (./include/linux/spinlock_api_smp.h:151 kernel/locking/spinlock.c:194) 
[ 19.749683][ C3] ? lockdep_hardirqs_on (kernel/locking/lockdep.c:4475) 
[ 19.749686][ C3] ? _raw_spin_unlock_irqrestore (./arch/x86/include/asm/preempt.h:104 ./include/linux/spinlock_api_smp.h:152 kernel/locking/spinlock.c:194) 
[ 19.749693][ C3] rcu_core (kernel/rcu/tree.c:2834) 
[ 19.749700][ C3] handle_softirqs (kernel/softirq.c:579) 
[ 19.749708][ C3] __irq_exit_rcu (kernel/softirq.c:614 kernel/softirq.c:453 kernel/softirq.c:680) 
[ 19.749712][ C3] irq_exit_rcu (kernel/softirq.c:698) 
[ 19.749716][ C3] sysvec_apic_timer_interrupt (arch/x86/kernel/apic/apic.c:1050 arch/x86/kernel/apic/apic.c:1050) 
[   19.749721][    C3]  </IRQ>
[   19.749723][    C3]  <TASK>
[ 19.749726][ C3] asm_sysvec_apic_timer_interrupt (./arch/x86/include/asm/idtentry.h:702) 
[ 19.749729][ C3] RIP: 0010:pv_native_safe_halt (arch/x86/kernel/paravirt.c:82) 
[ 19.749734][ C3] 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
[   19.749738][    C3] RSP: 0000:ffffc90000157de8 EFLAGS: 00000242
[   19.749743][    C3] RAX: 0000000000045acd RBX: 1ffff9200002afc1 RCX: ffffffffb4f905d9
[   19.749746][    C3] RDX: 0000000000000000 RSI: ffffffffb5a8f4e4 RDI: ffffffffb5253be0
[   19.749749][    C3] RBP: 0000000000000000 R08: 0000000000000001 R09: ffffed1006c366fa
[   19.749752][    C3] R10: ffff8880361b37d3 R11: ffffffffb5c11288 R12: 0000000000000000
[   19.749754][    C3] R13: ffff888001bf45c0 R14: dffffc0000000000 R15: 0000000000000000
[ 19.749761][ C3] ? ct_kernel_exit.constprop.0 (kernel/context_tracking.c:146) 
[ 19.749768][ C3] default_idle (./arch/x86/include/asm/paravirt.h:107 arch/x86/kernel/process.c:743) 
[ 19.749771][ C3] default_idle_call (./include/linux/cpuidle.h:143 kernel/sched/idle.c:118) 
[ 19.749775][ C3] cpuidle_idle_call (kernel/sched/idle.c:186) 
[ 19.749780][ C3] ? __pfx_cpuidle_idle_call (kernel/sched/idle.c:168) 
[ 19.749785][ C3] ? tsc_verify_tsc_adjust (arch/x86/kernel/tsc_sync.c:60) 
[ 19.749792][ C3] do_idle (kernel/sched/idle.c:325) 
[ 19.749797][ C3] cpu_startup_entry (kernel/sched/idle.c:422 (discriminator 1)) 
[ 19.749802][ C3] start_secondary (arch/x86/kernel/smpboot.c:203 arch/x86/kernel/smpboot.c:283) 
[ 19.749806][ C3] ? __pfx_start_secondary (arch/x86/kernel/smpboot.c:233) 
[ 19.749813][ C3] common_startup_64 (arch/x86/kernel/head_64.S:419) 
| [   19.776955][    C3] RCU nest depth: 0, expected: 0
| [   19.777266][    C3] INFO: lockdep is turned off.
| [   19.777588][    C3] Preemption disabled at:
| [ 19.777591][ C3] 0x0 
[   19.778153][    C3] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[   19.778156][    C3] Call Trace:
[   19.778158][    C3]  <IRQ>
[ 19.778162][ C3] dump_stack_lvl (lib/dump_stack.c:123) 
[ 19.778174][ C3] __might_resched (kernel/sched/core.c:8796) 
[ 19.778185][ C3] down_write (./include/linux/kernel.h:73 kernel/locking/rwsem.c:1576) 
[ 19.778192][ C3] ? __pfx_down_write (kernel/locking/rwsem.c:1575) 
[ 19.778197][ C3] ? simple_recursive_removal (fs/libfs.c:614) 
[ 19.778202][ C3] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:745) 
[ 19.778209][ 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) 
[ 19.778217][ C3] simple_recursive_removal (./include/linux/dcache.h:409 ./include/linux/dcache.h:424 ./include/linux/dcache.h:434 fs/libfs.c:617) 
[ 19.778222][ 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) 
[ 19.778227][ C3] ? __pfx_remove_one (fs/debugfs/inode.c:780) 
[ 19.778237][ C3] debugfs_remove (fs/debugfs/inode.c:806 fs/debugfs/inode.c:799) 
[ 19.778242][ C3] ref_tracker_dir_exit (lib/ref_tracker.c:412 lib/ref_tracker.c:196) 
[ 19.778249][ C3] ? __pfx_ref_tracker_free (lib/ref_tracker.c:254) 
[ 19.778254][ 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) 
[ 19.778260][ C3] ? rcu_do_batch (kernel/rcu/tree.c:2576) 
[ 19.778265][ C3] ? __pfx_ref_tracker_dir_exit (lib/ref_tracker.c:190) 
[ 19.778270][ C3] ? irq_exit_rcu (kernel/softirq.c:698) 
[ 19.778277][ C3] ? sysvec_apic_timer_interrupt (arch/x86/kernel/apic/apic.c:1050 arch/x86/kernel/apic/apic.c:1050) 
[ 19.778284][ C3] ? asm_sysvec_apic_timer_interrupt (./arch/x86/include/asm/idtentry.h:702) 
[ 19.778290][ C3] ? pv_native_safe_halt (arch/x86/kernel/paravirt.c:82) 
[ 19.778294][ C3] ? default_idle (./arch/x86/include/asm/paravirt.h:107 arch/x86/kernel/process.c:743) 
[ 19.778298][ C3] ? default_idle_call (./include/linux/cpuidle.h:143 kernel/sched/idle.c:118) 
[ 19.778302][ C3] ? cpuidle_idle_call (kernel/sched/idle.c:186) 
[ 19.778306][ C3] ? do_idle (kernel/sched/idle.c:325) 
[ 19.778310][ C3] ? cpu_startup_entry (kernel/sched/idle.c:422 (discriminator 1)) 
[ 19.778313][ C3] ? start_secondary (arch/x86/kernel/smpboot.c:203 arch/x86/kernel/smpboot.c:283) 
[ 19.778319][ C3] ? common_startup_64 (arch/x86/kernel/head_64.S:419) 
[ 19.778331][ C3] __put_net (net/core/net_namespace.c:732) 
[ 19.778337][ C3] __sk_destruct (./include/net/net_namespace.h:288 ./include/net/net_namespace.h:390 net/core/sock.c:2376) 
[ 19.778343][ C3] ? rcu_do_batch (kernel/rcu/tree.c:2576) 
[ 19.778346][ C3] rcu_do_batch (kernel/rcu/tree.c:2576) 
[ 19.778351][ C3] ? find_held_lock (kernel/locking/lockdep.c:5353) 
[ 19.778358][ C3] ? __pfx_rcu_do_batch (kernel/rcu/tree.c:2500) 
[ 19.778364][ C3] ? _raw_spin_unlock_irqrestore (./include/linux/spinlock_api_smp.h:151 kernel/locking/spinlock.c:194) 
[ 19.778371][ C3] ? lockdep_hardirqs_on (kernel/locking/lockdep.c:4475) 
[ 19.778376][ C3] ? _raw_spin_unlock_irqrestore (./arch/x86/include/asm/preempt.h:104 ./include/linux/spinlock_api_smp.h:152 kernel/locking/spinlock.c:194) 
[ 19.778385][ C3] rcu_core (kernel/rcu/tree.c:2834) 
[ 19.778392][ C3] handle_softirqs (kernel/softirq.c:579) 
[ 19.778400][ C3] __irq_exit_rcu (kernel/softirq.c:614 kernel/softirq.c:453 kernel/softirq.c:680) 
[ 19.778404][ C3] irq_exit_rcu (kernel/softirq.c:698) 
[ 19.778409][ C3] sysvec_apic_timer_interrupt (arch/x86/kernel/apic/apic.c:1050 arch/x86/kernel/apic/apic.c:1050) 
[   19.778415][    C3]  </IRQ>
[   19.778417][    C3]  <TASK>
[ 19.778421][ C3] asm_sysvec_apic_timer_interrupt (./arch/x86/include/asm/idtentry.h:702) 
[ 19.778426][ C3] RIP: 0010:pv_native_safe_halt (arch/x86/kernel/paravirt.c:82) 
[ 19.778432][ C3] 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
[   19.778437][    C3] RSP: 0000:ffffc90000157de8 EFLAGS: 00000242
[   19.778443][    C3] RAX: 0000000000045acd RBX: 1ffff9200002afc1 RCX: ffffffffb4f905d9
[   19.778447][    C3] RDX: 0000000000000000 RSI: ffffffffb5a8f4e4 RDI: ffffffffb5253be0
[   19.778450][    C3] RBP: 0000000000000000 R08: 0000000000000001 R09: ffffed1006c366fa
[   19.778453][    C3] R10: ffff8880361b37d3 R11: ffffffffb5c11288 R12: 0000000000000000
[   19.778456][    C3] R13: ffff888001bf45c0 R14: dffffc0000000000 R15: 0000000000000000
[ 19.778464][ C3] ? ct_kernel_exit.constprop.0 (kernel/context_tracking.c:146) 
[ 19.778473][ C3] default_idle (./arch/x86/include/asm/paravirt.h:107 arch/x86/kernel/process.c:743) 
[ 19.778476][ C3] default_idle_call (./include/linux/cpuidle.h:143 kernel/sched/idle.c:118) 
[ 19.778480][ C3] cpuidle_idle_call (kernel/sched/idle.c:186) 
[ 19.778485][ C3] ? __pfx_cpuidle_idle_call (kernel/sched/idle.c:168) 
[ 19.778491][ C3] ? tsc_verify_tsc_adjust (arch/x86/kernel/tsc_sync.c:60) 
[ 19.778498][ C3] do_idle (kernel/sched/idle.c:325) 
[ 19.778504][ C3] cpu_startup_entry (kernel/sched/idle.c:422 (discriminator 1)) 
[ 19.778510][ C3] start_secondary (arch/x86/kernel/smpboot.c:203 arch/x86/kernel/smpboot.c:283) 
[ 19.778515][ C3] ? __pfx_start_secondary (arch/x86/kernel/smpboot.c:233) 
[ 19.778524][ C3] common_startup_64 (arch/x86/kernel/head_64.S:419) 
| [   23.160519][    C2] INFO: lockdep is turned off.
| [   23.160750][    C2] Preemption disabled at:
| [ 23.160752][ C2] __slab_alloc.constprop.0 (mm/slub.c:3945) 
| [   23.161247][    C2] Tainted: [W]=WARN
[   23.161248][    C2] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[   23.161251][    C2] Call Trace:
[   23.161253][    C2]  <IRQ>
[ 23.161255][ C2] dump_stack_lvl (lib/dump_stack.c:123) 
[ 23.161265][ C2] __might_resched (kernel/sched/core.c:8796) 
[ 23.161273][ C2] down_write (./include/linux/kernel.h:73 kernel/locking/rwsem.c:1576) 
[ 23.161280][ C2] ? __pfx_down_write (kernel/locking/rwsem.c:1575) 
[ 23.161284][ C2] ? simple_recursive_removal (fs/libfs.c:614) 
[ 23.161291][ C2] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:745) 
[ 23.161299][ 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) 
[ 23.161310][ C2] simple_recursive_removal (./include/linux/dcache.h:409 ./include/linux/dcache.h:424 ./include/linux/dcache.h:434 fs/libfs.c:617) 
[ 23.161314][ 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) 
[ 23.161318][ C2] ? __pfx_remove_one (fs/debugfs/inode.c:780) 
[ 23.161327][ C2] debugfs_remove (fs/debugfs/inode.c:806 fs/debugfs/inode.c:799) 
[ 23.161331][ C2] ref_tracker_dir_exit (lib/ref_tracker.c:412 lib/ref_tracker.c:196) 
[ 23.161339][ C2] ? __pfx_ref_tracker_free (lib/ref_tracker.c:254) 
[ 23.161342][ 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) 
[ 23.161350][ C2] ? rcu_do_batch (kernel/rcu/tree.c:2576) 
[ 23.161354][ C2] ? __pfx_ref_tracker_dir_exit (lib/ref_tracker.c:190) 
[ 23.161357][ C2] ? irq_exit_rcu (kernel/softirq.c:698) 
[ 23.161363][ C2] ? sysvec_apic_timer_interrupt (arch/x86/kernel/apic/apic.c:1050 arch/x86/kernel/apic/apic.c:1050) 
[ 23.161370][ C2] ? asm_sysvec_apic_timer_interrupt (./arch/x86/include/asm/idtentry.h:702) 
[ 23.161374][ C2] ? unwind_next_frame (arch/x86/kernel/unwind_orc.c:512) 
[ 23.161379][ C2] ? arch_stack_walk (arch/x86/kernel/stacktrace.c:24) 
[ 23.161385][ C2] ? stack_trace_save (kernel/stacktrace.c:123) 
[ 23.161388][ C2] ? set_track_prepare (mm/slub.c:936) 
[ 23.161393][ C2] ? ___slab_alloc (mm/slub.c:967 mm/slub.c:3848) 
[ 23.161396][ C2] ? __slab_alloc.constprop.0 (mm/slub.c:3948) 
[ 23.161399][ C2] ? __kmalloc_cache_noprof (mm/slub.c:4023 mm/slub.c:4184 mm/slub.c:4353) 
[ 23.161402][ C2] ? kmem_cache_free (mm/slub.c:2333 mm/slub.c:4642 mm/slub.c:4744) 
[ 23.161408][ C2] ? bpf_sk_storage_free (./include/linux/rcupdate.h:341 ./include/linux/rcupdate.h:871 net/core/bpf_sk_storage.c:61) 
[ 23.161414][ C2] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:745) 
[ 23.161424][ C2] __put_net (net/core/net_namespace.c:732) 
[ 23.161431][ C2] __sk_destruct (./include/net/net_namespace.h:288 ./include/net/net_namespace.h:390 net/core/sock.c:2376) 
[ 23.161435][ C2] ? rcu_do_batch (kernel/rcu/tree.c:2576) 
[ 23.161438][ C2] rcu_do_batch (kernel/rcu/tree.c:2576) 
[ 23.161442][ C2] ? __pfx_rcu_do_batch (kernel/rcu/tree.c:2500) 
[ 23.161446][ C2] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:745) 
[ 23.161449][ C2] ? trace_irq_enable.constprop.0 (./include/trace/events/preemptirq.h:40) 
[ 23.161458][ C2] rcu_core (kernel/rcu/tree.c:2834) 
[ 23.161463][ C2] handle_softirqs (kernel/softirq.c:579) 
[ 23.161469][ C2] __irq_exit_rcu (kernel/softirq.c:614 kernel/softirq.c:453 kernel/softirq.c:680) 
[ 23.161472][ C2] irq_exit_rcu (kernel/softirq.c:698) 
[ 23.161474][ C2] sysvec_apic_timer_interrupt (arch/x86/kernel/apic/apic.c:1050 arch/x86/kernel/apic/apic.c:1050) 
[   23.161478][    C2]  </IRQ>
[   23.161480][    C2]  <TASK>
[ 23.161481][ C2] asm_sysvec_apic_timer_interrupt (./arch/x86/include/asm/idtentry.h:702) 
[ 23.161484][ C2] RIP: 0010:unwind_next_frame (arch/x86/kernel/unwind_orc.c:512) 
[ 23.161488][ C2] Code: 48 b8 00 00 00 00 00 fc ff df 48 89 f2 48 c1 e9 03 48 89 74 24 20 48 c1 ea 03 0f b6 14 02 0f b6 04 01 48 89 f1 83 e1 07 38 ca <0f> 9e c1 84 d2 0f 95 c2 84 d1 0f 85 73 16 00 00 41 83 e7 07 44 38
All code
========
   0:	48 b8 00 00 00 00 00 	movabs $0xdffffc0000000000,%rax
   7:	fc ff df 
   a:	48 89 f2             	mov    %rsi,%rdx
   d:	48 c1 e9 03          	shr    $0x3,%rcx
  11:	48 89 74 24 20       	mov    %rsi,0x20(%rsp)
  16:	48 c1 ea 03          	shr    $0x3,%rdx
  1a:	0f b6 14 02          	movzbl (%rdx,%rax,1),%edx
  1e:	0f b6 04 01          	movzbl (%rcx,%rax,1),%eax
  22:	48 89 f1             	mov    %rsi,%rcx
  25:	83 e1 07             	and    $0x7,%ecx
  28:	38 ca                	cmp    %cl,%dl
  2a:*	0f 9e c1             	setle  %cl		<-- trapping instruction
  2d:	84 d2                	test   %dl,%dl
  2f:	0f 95 c2             	setne  %dl
  32:	84 d1                	test   %dl,%cl
  34:	0f 85 73 16 00 00    	jne    0x16ad
  3a:	41 83 e7 07          	and    $0x7,%r15d
  3e:	44                   	rex.R
  3f:	38                   	.byte 0x38

Code starting with the faulting instruction
===========================================
   0:	0f 9e c1             	setle  %cl
   3:	84 d2                	test   %dl,%dl
   5:	0f 95 c2             	setne  %dl
   8:	84 d1                	test   %dl,%cl
   a:	0f 85 73 16 00 00    	jne    0x1683
  10:	41 83 e7 07          	and    $0x7,%r15d
  14:	44                   	rex.R
  15:	38                   	.byte 0x38
[   23.161491][    C2] RSP: 0018:ffffc90000a57850 EFLAGS: 00000246
[   23.161495][    C2] RAX: 0000000000000000 RBX: 1ffff9200014af13 RCX: 0000000000000000
[   23.161497][    C2] RDX: 0000000000000000 RSI: ffffffffb6db2230 RDI: ffffffffb6a76118
[   23.161500][    C2] RBP: 0000000000000001 R08: 0000000000000000 R09: ffffc90000a57991
[   23.161501][    C2] R10: ffffffffb2612687 R11: ffffc90000a57990 R12: ffffc90000a579a8
[   23.161503][    C2] R13: ffffc90000a57950 R14: ffffffffb6db222c R15: ffffffffb6db2231
[ 23.161507][ 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) 
[ 23.161512][ C2] ? do_exit (kernel/exit.c:950) 
[ 23.161521][ C2] ? arch_stack_walk (arch/x86/kernel/stacktrace.c:26) 
[ 23.161525][ C2] ? __pfx_unwind_next_frame (arch/x86/kernel/unwind_orc.c:469) 
[ 23.161532][ C2] ? do_exit (kernel/exit.c:950) 
[ 23.161536][ C2] ? kernel_text_address (kernel/extable.c:99) 
[ 23.161542][ C2] ? __pfx_stack_trace_consume_entry (kernel/stacktrace.c:83) 
[ 23.161546][ C2] arch_stack_walk (arch/x86/kernel/stacktrace.c:24) 
[ 23.161551][ C2] ? do_exit (kernel/exit.c:950) 
[ 23.161557][ C2] stack_trace_save (kernel/stacktrace.c:123) 
[ 23.161562][ C2] ? __pfx_stack_trace_save (kernel/stacktrace.c:114) 
[ 23.161567][ C2] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:745) 
[ 23.161570][ C2] set_track_prepare (mm/slub.c:936) 
[ 23.161574][ C2] ? __kmalloc_cache_noprof (mm/slub.c:4023 mm/slub.c:4184 mm/slub.c:4353) 
[ 23.161577][ C2] ? kmem_cache_free (mm/slub.c:2333 mm/slub.c:4642 mm/slub.c:4744) 
[ 23.161580][ C2] ? exit_mmap (mm/mmap.c:1311) 
[ 23.161585][ C2] ? mmput (kernel/fork.c:1449 kernel/fork.c:1383 kernel/fork.c:1404) 
[ 23.161590][ C2] ? exit_mm (kernel/exit.c:596) 
[ 23.161593][ C2] ? do_exit (kernel/exit.c:950) 
[ 23.161598][ C2] ___slab_alloc (mm/slub.c:967 mm/slub.c:3848) 
[ 23.161602][ C2] ? kmem_cache_free (mm/slub.c:2333 mm/slub.c:4642 mm/slub.c:4744) 
[ 23.161607][ C2] ? kmem_cache_free (mm/slub.c:2333 mm/slub.c:4642 mm/slub.c:4744) 
[ 23.161610][ C2] __slab_alloc.constprop.0 (mm/slub.c:3948) 
[ 23.161615][ C2] ? kmem_cache_free (mm/slub.c:2333 mm/slub.c:4642 mm/slub.c:4744) 
[ 23.161618][ C2] __kmalloc_cache_noprof (mm/slub.c:4023 mm/slub.c:4184 mm/slub.c:4353) 
[ 23.161623][ C2] kmem_cache_free (mm/slub.c:2333 mm/slub.c:4642 mm/slub.c:4744) 
[ 23.161627][ C2] ? exit_mmap (mm/mmap.c:1311) 
[ 23.161631][ C2] exit_mmap (mm/mmap.c:1311) 
[ 23.161636][ C2] ? __pfx_exit_mmap (mm/mmap.c:1259) 
[ 23.161639][ C2] ? __mutex_lock (./arch/x86/include/asm/preempt.h:104 kernel/locking/mutex.c:727 kernel/locking/mutex.c:746) 
[ 23.161643][ C2] ? lock_release (kernel/locking/lockdep.c:118 kernel/locking/lockdep.c:5884) 
[ 23.161647][ 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) 
[ 23.161656][ C2] mmput (kernel/fork.c:1449 kernel/fork.c:1383 kernel/fork.c:1404) 
[ 23.161659][ C2] exit_mm (kernel/exit.c:596) 
[ 23.161663][ C2] do_exit (kernel/exit.c:950) 
[ 23.161667][ C2] do_group_exit (kernel/exit.c:1089) 
[ 23.161671][ C2] __x64_sys_exit_group (kernel/exit.c:1117) 
[ 23.161675][ C2] x64_sys_call (arch/x86/entry/syscall_64.c:37) 
[ 23.161682][ C2] do_syscall_64 (arch/x86/entry/syscall_64.c:63 arch/x86/entry/syscall_64.c:94) 
[ 23.161686][ C2] entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:130) 
[   23.161688][    C2] RIP: 0033:0x7f9289359abd
[ 23.161692][ C2] Code: Unable to access opcode bytes at 0x7f9289359a93.

Code starting with the faulting instruction
===========================================
[   23.161693][    C2] RSP: 002b:00007ffe156fe288 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7
[   23.161696][    C2] RAX: ffffffffffffffda RBX: 00007f92894369c0 RCX: 00007f9289359abd
[   23.161698][    C2] RDX: 00000000000000e7 RSI: ffffffffffffff80 RDI: 0000000000000000
[   23.161700][    C2] RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000020
[   23.161702][    C2] R10: 00007ffe156fe130 R11: 0000000000000246 R12: 00007f92894369c0


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