======================================
| [   20.332835][    C3] 1 lock held by ksoftirqd/3/32:
| [ 20.333023][ C3] #0: ffffffffa97774c0 (rcu_callback){....}-{0:0}, at: rcu_do_batch (./include/linux/rcupdate.h:331 kernel/rcu/tree.c:2570) 
| [   20.333348][    C3]
| [   20.333348][    C3] stack backtrace:
[   20.333582][    C3] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[   20.333584][    C3] Call Trace:
[   20.333586][    C3]  <TASK>
[ 20.333588][ C3] dump_stack_lvl (lib/dump_stack.c:123) 
[ 20.333595][ C3] print_usage_bug.part.0 (kernel/locking/lockdep.c:4048) 
[ 20.333599][ C3] mark_lock_irq (kernel/locking/lockdep.c:4013 kernel/locking/lockdep.c:4059 kernel/locking/lockdep.c:4270) 
[ 20.333604][ C3] ? __pfx_unwind_next_frame (arch/x86/kernel/unwind_orc.c:469) 
[ 20.333608][ C3] ? save_trace (kernel/locking/lockdep.c:595) 
[ 20.333615][ C3] mark_lock (kernel/locking/lockdep.c:4756) 
[ 20.333618][ C3] mark_usage (kernel/locking/lockdep.c:4645) 
[ 20.333621][ C3] __lock_acquire (kernel/locking/lockdep.c:5194) 
[ 20.333624][ C3] ? __lock_acquire (kernel/locking/lockdep.c:5240) 
[ 20.333628][ C3] lock_acquire.part.0 (kernel/locking/lockdep.c:473 kernel/locking/lockdep.c:5873) 
[ 20.333631][ C3] ? simple_pin_fs (fs/libfs.c:1067) 
[ 20.333636][ C3] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:745) 
[ 20.333640][ C3] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5834) 
[ 20.333643][ C3] ? simple_pin_fs (fs/libfs.c:1067) 
[ 20.333647][ C3] _raw_spin_lock (./include/linux/spinlock_api_smp.h:134 kernel/locking/spinlock.c:154) 
[ 20.333650][ C3] ? simple_pin_fs (fs/libfs.c:1067) 
[ 20.333654][ C3] simple_pin_fs (fs/libfs.c:1067) 
[ 20.333658][ C3] debugfs_remove (fs/debugfs/inode.c:805 fs/debugfs/inode.c:799) 
[ 20.333661][ C3] ref_tracker_dir_exit (lib/ref_tracker.c:411 lib/ref_tracker.c:195) 
[ 20.333667][ C3] ? __pfx_ref_tracker_free (lib/ref_tracker.c:253) 
[ 20.333670][ 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) 
[ 20.333677][ C3] ? rcu_do_batch (kernel/rcu/tree.c:2576) 
[ 20.333679][ C3] ? __pfx_ref_tracker_dir_exit (lib/ref_tracker.c:189) 
[ 20.333683][ C3] ? smpboot_thread_fn (kernel/smpboot.c:164 (discriminator 3)) 
[ 20.333687][ C3] ? kthread (kernel/kthread.c:464) 
[ 20.333690][ C3] ? ret_from_fork (arch/x86/kernel/process.c:148) 
[ 20.333692][ C3] ? ret_from_fork_asm (arch/x86/entry/entry_64.S:258) 
[ 20.333695][ C3] ? migrate_enable (./arch/x86/include/asm/preempt.h:104 ./include/linux/preempt.h:481 ./include/linux/preempt.h:481 kernel/sched/core.c:2427) 
[ 20.333698][ C3] ? __pfx_migrate_enable (kernel/sched/core.c:2402) 
[ 20.333704][ C3] __put_net (net/core/net_namespace.c:732) 
[ 20.333707][ C3] __sk_destruct (./include/net/net_namespace.h:288 ./include/net/net_namespace.h:390 net/core/sock.c:2376) 
[ 20.333711][ C3] ? rcu_do_batch (kernel/rcu/tree.c:2576) 
[ 20.333713][ C3] rcu_do_batch (kernel/rcu/tree.c:2576) 
[ 20.333718][ C3] ? __pfx_rcu_do_batch (kernel/rcu/tree.c:2500) 
[ 20.333721][ C3] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:745) 
[ 20.333724][ C3] ? note_gp_changes (kernel/rcu/tree.c:1326 (discriminator 1)) 
[ 20.333727][ C3] ? lockdep_hardirqs_on (kernel/locking/lockdep.c:4475) 
[ 20.333731][ C3] rcu_core (kernel/rcu/tree.c:2834) 
[ 20.333735][ C3] handle_softirqs (kernel/softirq.c:579) 
[ 20.333739][ C3] ? __pfx_run_ksoftirqd (kernel/softirq.c:961) 
[ 20.333742][ C3] run_ksoftirqd (kernel/softirq.c:436 kernel/softirq.c:969 kernel/softirq.c:960) 
[ 20.333745][ C3] smpboot_thread_fn (kernel/smpboot.c:164 (discriminator 3)) 
[ 20.333749][ C3] ? __pfx_smpboot_thread_fn (kernel/smpboot.c:107) 
[ 20.333753][ C3] kthread (kernel/kthread.c:464) 
[ 20.333755][ C3] ? __pfx_kthread (kernel/kthread.c:413) 
[ 20.333757][ C3] ? ret_from_fork (arch/x86/kernel/process.c:147) 
[ 20.333760][ C3] ? __lock_release (kernel/locking/lockdep.c:5539) 
[ 20.333763][ C3] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:745) 
[ 20.333766][ C3] ? __pfx_kthread (kernel/kthread.c:413) 
[ 20.333769][ C3] ret_from_fork (arch/x86/kernel/process.c:148) 
[ 20.333772][ C3] ? __pfx_kthread (kernel/kthread.c:413) 
[ 20.333774][ C3] ret_from_fork_asm (arch/x86/entry/entry_64.S:258) 
| [   20.344945][    C3] RCU nest depth: 0, expected: 0
| [   20.345114][    C3] INFO: lockdep is turned off.
| [   20.345282][    C3] Preemption disabled at:
| [ 20.345283][ C3] handle_softirqs (kernel/softirq.c:553) 
[   20.345638][    C3] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[   20.345640][    C3] Call Trace:
[   20.345641][    C3]  <TASK>
[ 20.345643][ C3] dump_stack_lvl (lib/dump_stack.c:123) 
[ 20.345649][ C3] __might_resched (kernel/sched/core.c:8796) 
[ 20.345656][ C3] down_write (./include/linux/kernel.h:73 kernel/locking/rwsem.c:1576) 
[ 20.345660][ C3] ? __pfx_down_write (kernel/locking/rwsem.c:1575) 
[ 20.345663][ C3] ? simple_recursive_removal (fs/libfs.c:614) 
[ 20.345667][ C3] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:745) 
[ 20.345671][ 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) 
[ 20.345677][ C3] simple_recursive_removal (./include/linux/dcache.h:409 ./include/linux/dcache.h:424 ./include/linux/dcache.h:434 fs/libfs.c:617) 
[ 20.345682][ 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) 
[ 20.345685][ C3] ? __pfx_remove_one (fs/debugfs/inode.c:780) 
[ 20.345690][ C3] debugfs_remove (fs/debugfs/inode.c:806 fs/debugfs/inode.c:799) 
[ 20.345693][ C3] ref_tracker_dir_exit (lib/ref_tracker.c:411 lib/ref_tracker.c:195) 
[ 20.345698][ C3] ? __pfx_ref_tracker_free (lib/ref_tracker.c:253) 
[ 20.345701][ 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) 
[ 20.345706][ C3] ? rcu_do_batch (kernel/rcu/tree.c:2576) 
[ 20.345709][ C3] ? __pfx_ref_tracker_dir_exit (lib/ref_tracker.c:189) 
[ 20.345712][ C3] ? smpboot_thread_fn (kernel/smpboot.c:164 (discriminator 3)) 
[ 20.345716][ C3] ? kthread (kernel/kthread.c:464) 
[ 20.345718][ C3] ? ret_from_fork (arch/x86/kernel/process.c:148) 
[ 20.345721][ C3] ? ret_from_fork_asm (arch/x86/entry/entry_64.S:258) 
[ 20.345726][ C3] ? migrate_enable (./arch/x86/include/asm/preempt.h:104 ./include/linux/preempt.h:481 ./include/linux/preempt.h:481 kernel/sched/core.c:2427) 
[ 20.345729][ C3] ? __pfx_migrate_enable (kernel/sched/core.c:2402) 
[ 20.345735][ C3] __put_net (net/core/net_namespace.c:732) 
[ 20.345738][ C3] __sk_destruct (./include/net/net_namespace.h:288 ./include/net/net_namespace.h:390 net/core/sock.c:2376) 
[ 20.345742][ C3] ? rcu_do_batch (kernel/rcu/tree.c:2576) 
[ 20.345745][ C3] rcu_do_batch (kernel/rcu/tree.c:2576) 
[ 20.345750][ C3] ? __pfx_rcu_do_batch (kernel/rcu/tree.c:2500) 
[ 20.345753][ C3] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:745) 
[ 20.345756][ C3] ? note_gp_changes (kernel/rcu/tree.c:1326 (discriminator 1)) 
[ 20.345759][ C3] ? lockdep_hardirqs_on (kernel/locking/lockdep.c:4475) 
[ 20.345763][ C3] rcu_core (kernel/rcu/tree.c:2834) 
[ 20.345768][ C3] handle_softirqs (kernel/softirq.c:579) 
[ 20.345772][ C3] ? __pfx_run_ksoftirqd (kernel/softirq.c:961) 
[ 20.345775][ C3] run_ksoftirqd (kernel/softirq.c:436 kernel/softirq.c:969 kernel/softirq.c:960) 
[ 20.345778][ C3] smpboot_thread_fn (kernel/smpboot.c:164 (discriminator 3)) 
[ 20.345782][ C3] ? __pfx_smpboot_thread_fn (kernel/smpboot.c:107) 
[ 20.345786][ C3] kthread (kernel/kthread.c:464) 
[ 20.345788][ C3] ? __pfx_kthread (kernel/kthread.c:413) 
[ 20.345790][ C3] ? ret_from_fork (arch/x86/kernel/process.c:147) 
[ 20.345793][ C3] ? __lock_release (kernel/locking/lockdep.c:5539) 
[ 20.345797][ C3] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:745) 
[ 20.345799][ C3] ? __pfx_kthread (kernel/kthread.c:413) 
[ 20.345802][ C3] ret_from_fork (arch/x86/kernel/process.c:148) 
[ 20.345805][ C3] ? __pfx_kthread (kernel/kthread.c:413) 
[ 20.345808][ C3] ret_from_fork_asm (arch/x86/entry/entry_64.S:258) 
| [   25.458559][    C2] INFO: lockdep is turned off.
| [   25.458959][    C2] Preemption disabled at:
| [ 25.458962][ C2] handle_softirqs (kernel/softirq.c:553) 
| [   25.459775][    C2] Tainted: [W]=WARN
[   25.459777][    C2] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[   25.459780][    C2] Call Trace:
[   25.459783][    C2]  <IRQ>
[ 25.459786][ C2] dump_stack_lvl (lib/dump_stack.c:123) 
[ 25.459796][ C2] __might_resched (kernel/sched/core.c:8796) 
[ 25.459806][ C2] down_write (./include/linux/kernel.h:73 kernel/locking/rwsem.c:1576) 
[ 25.459813][ C2] ? __pfx_down_write (kernel/locking/rwsem.c:1575) 
[ 25.459818][ C2] ? simple_recursive_removal (fs/libfs.c:614) 
[ 25.459824][ C2] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:745) 
[ 25.459832][ 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) 
[ 25.459841][ C2] simple_recursive_removal (./include/linux/dcache.h:409 ./include/linux/dcache.h:424 ./include/linux/dcache.h:434 fs/libfs.c:617) 
[ 25.459846][ 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) 
[ 25.459851][ C2] ? __pfx_remove_one (fs/debugfs/inode.c:780) 
[ 25.459860][ C2] debugfs_remove (fs/debugfs/inode.c:806 fs/debugfs/inode.c:799) 
[ 25.459865][ C2] ref_tracker_dir_exit (lib/ref_tracker.c:411 lib/ref_tracker.c:195) 
[ 25.459873][ C2] ? __pfx_ref_tracker_free (lib/ref_tracker.c:253) 
[ 25.459878][ 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) 
[ 25.459885][ C2] ? rcu_do_batch (kernel/rcu/tree.c:2576) 
[ 25.459891][ C2] ? __pfx_ref_tracker_dir_exit (lib/ref_tracker.c:189) 
[ 25.459895][ C2] ? irq_exit_rcu (kernel/softirq.c:698) 
[ 25.459900][ C2] ? sysvec_apic_timer_interrupt (arch/x86/kernel/apic/apic.c:1050 arch/x86/kernel/apic/apic.c:1050) 
[ 25.459907][ C2] ? asm_sysvec_apic_timer_interrupt (./arch/x86/include/asm/idtentry.h:702) 
[ 25.459913][ C2] ? __rcu_read_unlock (kernel/rcu/tree_plugin.h:441 (discriminator 2)) 
[ 25.459917][ C2] ? is_bpf_text_address (kernel/bpf/core.c:777) 
[ 25.459923][ C2] ? kernel_text_address (kernel/extable.c:97 kernel/extable.c:94) 
[ 25.459928][ C2] ? __kernel_text_address (kernel/extable.c:79) 
[ 25.459932][ C2] ? unwind_get_return_address (arch/x86/kernel/unwind_orc.c:369 arch/x86/kernel/unwind_orc.c:364) 
[ 25.459937][ C2] ? arch_stack_walk (arch/x86/kernel/stacktrace.c:26) 
[ 25.459944][ C2] ? stack_trace_save (kernel/stacktrace.c:123) 
[ 25.459949][ C2] ? set_track_prepare (mm/slub.c:936) 
[ 25.459955][ C2] ? bpf_sk_storage_free (./include/linux/rcupdate.h:341 ./include/linux/rcupdate.h:871 net/core/bpf_sk_storage.c:61) 
[ 25.459961][ C2] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:745) 
[ 25.459969][ C2] __put_net (net/core/net_namespace.c:732) 
[ 25.459974][ C2] __sk_destruct (./include/net/net_namespace.h:288 ./include/net/net_namespace.h:390 net/core/sock.c:2376) 
[ 25.459981][ C2] ? rcu_do_batch (kernel/rcu/tree.c:2576) 
[ 25.459985][ C2] rcu_do_batch (kernel/rcu/tree.c:2576) 
[ 25.459994][ C2] ? __pfx_rcu_do_batch (kernel/rcu/tree.c:2500) 
[ 25.460000][ C2] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:745) 
[ 25.460005][ C2] ? trace_irq_enable.constprop.0 (./include/trace/events/preemptirq.h:40) 
[ 25.460015][ C2] rcu_core (kernel/rcu/tree.c:2834) 
[ 25.460022][ C2] handle_softirqs (kernel/softirq.c:579) 
[ 25.460032][ C2] __irq_exit_rcu (kernel/softirq.c:614 kernel/softirq.c:453 kernel/softirq.c:680) 
[ 25.460037][ C2] irq_exit_rcu (kernel/softirq.c:698) 
[ 25.460041][ C2] sysvec_apic_timer_interrupt (arch/x86/kernel/apic/apic.c:1050 arch/x86/kernel/apic/apic.c:1050) 
[   25.460047][    C2]  </IRQ>
[   25.460049][    C2]  <TASK>
[ 25.460052][ C2] asm_sysvec_apic_timer_interrupt (./arch/x86/include/asm/idtentry.h:702) 
[ 25.460057][ C2] RIP: 0010:__rcu_read_unlock (kernel/rcu/tree_plugin.h:441 (discriminator 2)) 
[ 25.460062][ C2] Code: 04 04 00 00 48 b8 00 00 00 00 00 fc ff df 48 89 fa 48 c1 ea 03 0f b6 14 02 48 89 f8 83 e0 07 83 c0 03 38 d0 7c 04 84 d2 75 41 <8b> 83 04 04 00 00 3d ff ff ff 3f 77 13 5b 5d 41 5c c3 cc cc cc cc
All code
========
   0:	04 04                	add    $0x4,%al
   2:	00 00                	add    %al,(%rax)
   4:	48 b8 00 00 00 00 00 	movabs $0xdffffc0000000000,%rax
   b:	fc ff df 
   e:	48 89 fa             	mov    %rdi,%rdx
  11:	48 c1 ea 03          	shr    $0x3,%rdx
  15:	0f b6 14 02          	movzbl (%rdx,%rax,1),%edx
  19:	48 89 f8             	mov    %rdi,%rax
  1c:	83 e0 07             	and    $0x7,%eax
  1f:	83 c0 03             	add    $0x3,%eax
  22:	38 d0                	cmp    %dl,%al
  24:	7c 04                	jl     0x2a
  26:	84 d2                	test   %dl,%dl
  28:	75 41                	jne    0x6b
  2a:*	8b 83 04 04 00 00    	mov    0x404(%rbx),%eax		<-- trapping instruction
  30:	3d ff ff ff 3f       	cmp    $0x3fffffff,%eax
  35:	77 13                	ja     0x4a
  37:	5b                   	pop    %rbx
  38:	5d                   	pop    %rbp
  39:	41 5c                	pop    %r12
  3b:	c3                   	ret
  3c:	cc                   	int3
  3d:	cc                   	int3
  3e:	cc                   	int3
  3f:	cc                   	int3

Code starting with the faulting instruction
===========================================
   0:	8b 83 04 04 00 00    	mov    0x404(%rbx),%eax
   6:	3d ff ff ff 3f       	cmp    $0x3fffffff,%eax
   b:	77 13                	ja     0x20
   d:	5b                   	pop    %rbx
   e:	5d                   	pop    %rbp
   f:	41 5c                	pop    %r12
  11:	c3                   	ret
  12:	cc                   	int3
  13:	cc                   	int3
  14:	cc                   	int3
  15:	cc                   	int3
[   25.460067][    C2] RSP: 0018:ffffc900009b7760 EFLAGS: 00000246
[   25.460072][    C2] RAX: 0000000000000007 RBX: ffff888004e30040 RCX: 0000000000000002
[   25.460075][    C2] RDX: 0000000000000000 RSI: ffffffffa8a53b60 RDI: ffff888004e30444
[   25.460078][    C2] RBP: ffff888004e30040 R08: 0000000000000000 R09: 0000000000000000
[   25.460082][    C2] R10: ffffffffa62e29b3 R11: ffffc900009b7820 R12: ffff888004e30040
[   25.460085][    C2] R13: 0000000000000000 R14: ffff888004e30040 R15: ffff888002748c20
[ 25.460091][ C2] ? is_bpf_text_address (./include/linux/rcupdate.h:331 ./include/linux/rcupdate.h:841 kernel/bpf/core.c:772) 
[ 25.460102][ C2] is_bpf_text_address (kernel/bpf/core.c:777) 
[ 25.460107][ C2] kernel_text_address (kernel/extable.c:97 kernel/extable.c:94) 
[ 25.460113][ C2] __kernel_text_address (kernel/extable.c:79) 
[ 25.460118][ C2] unwind_get_return_address (arch/x86/kernel/unwind_orc.c:369 arch/x86/kernel/unwind_orc.c:364) 
[ 25.460122][ C2] ? __pfx_stack_trace_consume_entry (kernel/stacktrace.c:83) 
[ 25.460127][ C2] arch_stack_walk (arch/x86/kernel/stacktrace.c:26) 
[ 25.460139][ C2] stack_trace_save (kernel/stacktrace.c:123) 
[ 25.460145][ C2] ? __pfx_stack_trace_save (kernel/stacktrace.c:114) 
[ 25.460153][ C2] ? __alloc_object (mm/kmemleak.c:481 mm/kmemleak.c:661) 
[ 25.460159][ C2] set_track_prepare (mm/slub.c:936) 
[ 25.460163][ C2] ? __kmalloc_cache_noprof (./include/linux/kmemleak.h:43 mm/slub.c:4151 mm/slub.c:4196 mm/slub.c:4353) 
[ 25.460170][ C2] ? kmem_cache_free (mm/slub.c:2333 mm/slub.c:4642 mm/slub.c:4744) 
[ 25.460175][ C2] ? __put_anon_vma (mm/rmap.c:2757) 
[ 25.460180][ C2] ? unlink_anon_vmas (./include/linux/rmap.h:117 mm/rmap.c:444) 
[ 25.460185][ C2] ? free_pgtables (./include/linux/hugetlb_inline.h:11 mm/memory.c:372) 
[ 25.460191][ C2] ? exit_mmap (mm/mmap.c:1297) 
[ 25.460196][ C2] ? mmput (kernel/fork.c:1449 kernel/fork.c:1383 kernel/fork.c:1404) 
[ 25.460201][ C2] ? exit_mm (kernel/exit.c:596) 
[ 25.460207][ C2] ? do_exit (kernel/exit.c:950) 
[ 25.460212][ C2] ? do_group_exit (kernel/exit.c:1089) 
[ 25.460216][ C2] ? __x64_sys_exit_group (kernel/exit.c:1117) 
[ 25.460220][ C2] ? x64_sys_call (arch/x86/entry/syscall_64.c:37) 
[ 25.460227][ C2] ? do_syscall_64 (arch/x86/entry/syscall_64.c:63 arch/x86/entry/syscall_64.c:94) 
[ 25.460232][ C2] ? entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:130) 
[ 25.460237][ C2] __alloc_object (mm/kmemleak.c:697) 
[ 25.460244][ C2] __create_object (mm/kmemleak.c:770) 
[ 25.460252][ C2] __kmalloc_cache_noprof (./include/linux/kmemleak.h:43 mm/slub.c:4151 mm/slub.c:4196 mm/slub.c:4353) 
[ 25.460260][ C2] kmem_cache_free (mm/slub.c:2333 mm/slub.c:4642 mm/slub.c:4744) 
[ 25.460266][ C2] ? __put_anon_vma (mm/rmap.c:2757) 
[ 25.460273][ C2] __put_anon_vma (mm/rmap.c:2757) 
[ 25.460279][ C2] unlink_anon_vmas (./include/linux/rmap.h:117 mm/rmap.c:444) 
[ 25.460285][ C2] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:745) 
[ 25.460292][ C2] free_pgtables (./include/linux/hugetlb_inline.h:11 mm/memory.c:372) 
[ 25.460301][ C2] ? __pfx_free_pgtables (mm/memory.c:349) 
[ 25.460306][ C2] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5834) 
[ 25.460310][ C2] ? exit_mmap (./include/linux/seqlock.h:431 ./include/linux/mmap_lock.h:83 ./include/linux/mmap_lock.h:130 mm/mmap.c:1292) 
[ 25.460318][ 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) 
[ 25.460324][ C2] ? __pfx_down_write (kernel/locking/rwsem.c:1575) 
[ 25.460328][ C2] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:745) 
[ 25.460332][ C2] ? trace_lock_release (./include/trace/events/lock.h:69 (discriminator 21)) 
[ 25.460341][ C2] exit_mmap (mm/mmap.c:1297) 
[ 25.460348][ C2] ? __pfx_exit_mmap (mm/mmap.c:1259) 
[ 25.460354][ C2] ? __mutex_lock (./arch/x86/include/asm/preempt.h:104 kernel/locking/mutex.c:727 kernel/locking/mutex.c:746) 
[ 25.460362][ C2] ? lock_release (kernel/locking/lockdep.c:118 kernel/locking/lockdep.c:5884) 
[ 25.460368][ 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) 
[ 25.460384][ C2] mmput (kernel/fork.c:1449 kernel/fork.c:1383 kernel/fork.c:1404) 
[ 25.460390][ C2] exit_mm (kernel/exit.c:596) 
[ 25.460396][ C2] do_exit (kernel/exit.c:950) 
[ 25.460404][ C2] do_group_exit (kernel/exit.c:1089) 
[ 25.460411][ C2] __x64_sys_exit_group (kernel/exit.c:1117) 
[ 25.460417][ C2] x64_sys_call (arch/x86/entry/syscall_64.c:37) 
[ 25.460422][ C2] do_syscall_64 (arch/x86/entry/syscall_64.c:63 arch/x86/entry/syscall_64.c:94) 
[ 25.460428][ C2] entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:130) 
[   25.460432][    C2] RIP: 0033:0x7fb888197abd
[ 25.460437][ C2] Code: Unable to access opcode bytes at 0x7fb888197a93.

Code starting with the faulting instruction
===========================================
[   25.460440][    C2] RSP: 002b:00007ffc93ddedb8 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7
[   25.460445][    C2] RAX: ffffffffffffffda RBX: 00007fb8882749c0 RCX: 00007fb888197abd
[   25.460448][    C2] RDX: 00000000000000e7 RSI: ffffffffffffff80 RDI: 0000000000000000
[   25.460451][    C2] RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000030
[   25.460454][    C2] R10: 00007ffc93ddec40 R11: 0000000000000246 R12: 00007fb8882749c0


Finger prints:
mark_lock_irq:mark_lock:mark_usage:__lock_acquire:_raw_spin_lock
handle_softirqs:dump_stack_lvl:__might_resched:down_write:simple_recursive_removal