======================================
| [ 14.785664][ C2] #5: ffffffffb07775e0 (rcu_read_lock){....}-{1:3}, at: page_ref_add_unless.constprop.0 (./include/linux/rcupdate.h:331 ./include/linux/rcupdate.h:841 ./include/linux/page_ref.h:235) 
| [ 14.786058][ C2] #6: ffffffffb07774c0 (rcu_callback){....}-{0:0}, at: rcu_do_batch (./include/linux/rcupdate.h:331 kernel/rcu/tree.c:2570) 
| [   14.786402][    C2]
| [   14.786402][    C2] stack backtrace:
[   14.786651][    C2] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[   14.786653][    C2] Call Trace:
[   14.786655][    C2]  <IRQ>
[ 14.786657][ C2] dump_stack_lvl (lib/dump_stack.c:123) 
[ 14.786663][ C2] print_usage_bug.part.0 (kernel/locking/lockdep.c:4048) 
[ 14.786668][ C2] mark_lock_irq (kernel/locking/lockdep.c:4013 kernel/locking/lockdep.c:4059 kernel/locking/lockdep.c:4270) 
[ 14.786672][ C2] ? __pfx_unwind_next_frame (arch/x86/kernel/unwind_orc.c:469) 
[ 14.786676][ C2] ? save_trace (kernel/locking/lockdep.c:595) 
[ 14.786683][ C2] mark_lock (kernel/locking/lockdep.c:4756) 
[ 14.786687][ C2] mark_usage (kernel/locking/lockdep.c:4645) 
[ 14.786690][ C2] __lock_acquire (kernel/locking/lockdep.c:5194) 
[ 14.786693][ C2] ? __lock_acquire (kernel/locking/lockdep.c:5240) 
[ 14.786697][ C2] lock_acquire.part.0 (kernel/locking/lockdep.c:473 kernel/locking/lockdep.c:5873) 
[ 14.786700][ C2] ? simple_pin_fs (fs/libfs.c:1067) 
[ 14.786704][ C2] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:745) 
[ 14.786709][ C2] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5834) 
[ 14.786711][ C2] ? simple_pin_fs (fs/libfs.c:1067) 
[ 14.786716][ C2] _raw_spin_lock (./include/linux/spinlock_api_smp.h:134 kernel/locking/spinlock.c:154) 
[ 14.786719][ C2] ? simple_pin_fs (fs/libfs.c:1067) 
[ 14.786723][ C2] simple_pin_fs (fs/libfs.c:1067) 
[ 14.786727][ C2] debugfs_remove (fs/debugfs/inode.c:805 fs/debugfs/inode.c:799) 
[ 14.786730][ C2] ref_tracker_dir_exit (lib/ref_tracker.c:411 lib/ref_tracker.c:195) 
[ 14.786736][ C2] ? __pfx_ref_tracker_free (lib/ref_tracker.c:253) 
[ 14.786739][ 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) 
[ 14.786745][ C2] ? rcu_do_batch (kernel/rcu/tree.c:2576) 
[ 14.786747][ C2] ? __pfx_ref_tracker_dir_exit (lib/ref_tracker.c:189) 
[ 14.786750][ C2] ? irq_exit_rcu (kernel/softirq.c:698) 
[ 14.786753][ C2] ? sysvec_apic_timer_interrupt (arch/x86/kernel/apic/apic.c:1050 arch/x86/kernel/apic/apic.c:1050) 
[ 14.786758][ C2] ? asm_sysvec_apic_timer_interrupt (./arch/x86/include/asm/idtentry.h:702) 
[ 14.786762][ C2] ? lock_acquire.part.0 (kernel/locking/lockdep.c:5875) 
[ 14.786764][ C2] ? page_ref_add_unless.constprop.0 (./include/linux/rcupdate.h:842 ./include/linux/page_ref.h:235) 
[ 14.786767][ C2] ? next_uptodate_folio (mm/filemap.c:3563) 
[ 14.786770][ C2] ? filemap_map_pages (mm/filemap.c:3746) 
[ 14.786773][ C2] ? do_fault_around (mm/memory.c:5476) 
[ 14.786775][ C2] ? do_pte_missing (mm/memory.c:5509 mm/memory.c:5652 mm/memory.c:4160) 
[ 14.786779][ C2] ? handle_pte_fault (mm/memory.c:5997) 
[ 14.786782][ C2] ? __handle_mm_fault (mm/memory.c:6140) 
[ 14.786787][ C2] __put_net (net/core/net_namespace.c:732) 
[ 14.786791][ C2] __sk_destruct (./include/net/net_namespace.h:288 ./include/net/net_namespace.h:390 net/core/sock.c:2376) 
[ 14.786795][ C2] ? rcu_do_batch (kernel/rcu/tree.c:2576) 
[ 14.786797][ C2] rcu_do_batch (kernel/rcu/tree.c:2576) 
[ 14.786802][ C2] ? __pfx_rcu_do_batch (kernel/rcu/tree.c:2500) 
[ 14.786805][ C2] ? mark_held_locks (kernel/locking/lockdep.c:4328) 
[ 14.786808][ C2] ? note_gp_changes (kernel/rcu/tree.c:1326 (discriminator 1)) 
[ 14.786811][ C2] ? lockdep_hardirqs_on (kernel/locking/lockdep.c:4475) 
[ 14.786815][ C2] rcu_core (kernel/rcu/tree.c:2834) 
[ 14.786818][ C2] handle_softirqs (kernel/softirq.c:579) 
[ 14.786824][ C2] __irq_exit_rcu (kernel/softirq.c:614 kernel/softirq.c:453 kernel/softirq.c:680) 
[ 14.786827][ C2] irq_exit_rcu (kernel/softirq.c:698) 
[ 14.786829][ C2] sysvec_apic_timer_interrupt (arch/x86/kernel/apic/apic.c:1050 arch/x86/kernel/apic/apic.c:1050) 
[   14.786833][    C2]  </IRQ>
[   14.786834][    C2]  <TASK>
[ 14.786835][ C2] asm_sysvec_apic_timer_interrupt (./arch/x86/include/asm/idtentry.h:702) 
[ 14.786838][ C2] RIP: 0010:lock_acquire.part.0 (kernel/locking/lockdep.c:5875) 
[ 14.786842][ C2] Code: ff ff ff 65 0f c1 05 fd 8b 14 05 83 f8 01 0f 85 3e 01 00 00 9c 58 f6 c4 02 0f 85 29 01 00 00 48 85 db 74 01 fb 48 8b 44 24 30 <65> 48 2b 05 6e 4b 14 05 0f 85 3a 01 00 00 48 83 c4 38 5b 5d 41 5c
All code
========
   0:	ff                   	(bad)
   1:	ff                   	(bad)
   2:	ff 65 0f             	jmp    *0xf(%rbp)
   5:	c1 05 fd 8b 14 05 83 	roll   $0x83,0x5148bfd(%rip)        # 0x5148c09
   c:	f8                   	clc
   d:	01 0f                	add    %ecx,(%rdi)
   f:	85 3e                	test   %edi,(%rsi)
  11:	01 00                	add    %eax,(%rax)
  13:	00 9c 58 f6 c4 02 0f 	add    %bl,0xf02c4f6(%rax,%rbx,2)
  1a:	85 29                	test   %ebp,(%rcx)
  1c:	01 00                	add    %eax,(%rax)
  1e:	00 48 85             	add    %cl,-0x7b(%rax)
  21:	db 74 01 fb          	(bad)  -0x5(%rcx,%rax,1)
  25:	48 8b 44 24 30       	mov    0x30(%rsp),%rax
  2a:*	65 48 2b 05 6e 4b 14 	sub    %gs:0x5144b6e(%rip),%rax        # 0x5144ba0		<-- trapping instruction
  31:	05 
  32:	0f 85 3a 01 00 00    	jne    0x172
  38:	48 83 c4 38          	add    $0x38,%rsp
  3c:	5b                   	pop    %rbx
  3d:	5d                   	pop    %rbp
  3e:	41 5c                	pop    %r12

Code starting with the faulting instruction
===========================================
   0:	65 48 2b 05 6e 4b 14 	sub    %gs:0x5144b6e(%rip),%rax        # 0x5144b76
   7:	05 
   8:	0f 85 3a 01 00 00    	jne    0x148
   e:	48 83 c4 38          	add    $0x38,%rsp
  12:	5b                   	pop    %rbx
  13:	5d                   	pop    %rbp
  14:	41 5c                	pop    %r12
[   14.786844][    C2] RSP: 0000:ffffc90000c27920 EFLAGS: 00000206
[   14.786847][    C2] RAX: cdd8fb17449dcf00 RBX: 0000000000000200 RCX: 0000000000000001
[   14.786849][    C2] RDX: 0000000000000000 RSI: ffffffffb027890a RDI: ffffffffafa53be0
[   14.786851][    C2] RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000001
[   14.786853][    C2] R10: 0000000000000000 R11: ffffffffb07775e0 R12: 0000000000000002
[   14.786854][    C2] R13: 0000000000000000 R14: 0000000000000000 R15: ffffffffb07775e0
[ 14.786860][ C2] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:745) 
[ 14.786863][ C2] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5834) 
[ 14.786866][ C2] ? page_ref_add_unless.constprop.0 (./include/linux/rcupdate.h:331 ./include/linux/rcupdate.h:841 ./include/linux/page_ref.h:235) 
[ 14.786870][ C2] page_ref_add_unless.constprop.0 (./include/linux/rcupdate.h:842 ./include/linux/page_ref.h:235) 
[ 14.786872][ C2] ? page_ref_add_unless.constprop.0 (./include/linux/rcupdate.h:331 ./include/linux/rcupdate.h:841 ./include/linux/page_ref.h:235) 
[ 14.786875][ C2] next_uptodate_folio (mm/filemap.c:3563) 
[ 14.786879][ C2] filemap_map_pages (mm/filemap.c:3746) 
[ 14.786888][ C2] ? __pfx_filemap_map_pages (mm/filemap.c:3692) 
[ 14.786892][ C2] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:745) 
[ 14.786895][ C2] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5834) 
[ 14.786898][ C2] ? do_fault_around (./include/linux/rcupdate.h:331 ./include/linux/rcupdate.h:841 mm/memory.c:5475) 
[ 14.786902][ C2] ? __pfx_filemap_map_pages (mm/filemap.c:3692) 
[ 14.786904][ C2] do_fault_around (mm/memory.c:5476) 
[ 14.786909][ C2] do_pte_missing (mm/memory.c:5509 mm/memory.c:5652 mm/memory.c:4160) 
[ 14.786912][ C2] ? rcu_read_unlock (./include/linux/rcupdate.h:341 (discriminator 9) ./include/linux/rcupdate.h:871 (discriminator 9)) 
[ 14.786915][ C2] handle_pte_fault (mm/memory.c:5997) 
[ 14.786919][ C2] ? __pfx_handle_pte_fault (mm/memory.c:5954) 
[ 14.786923][ C2] ? reacquire_held_locks (kernel/locking/lockdep.c:5388) 
[ 14.786926][ C2] ? do_user_addr_fault (arch/x86/mm/fault.c:1327) 
[ 14.786930][ C2] __handle_mm_fault (mm/memory.c:6140) 
[ 14.786933][ C2] ? __pfx___handle_mm_fault (mm/memory.c:6049) 
[ 14.786936][ C2] ? __lock_release (kernel/locking/lockdep.c:5585) 
[ 14.786943][ C2] ? __pfx_lock_vma_under_rcu (mm/memory.c:6547) 
[ 14.786948][ C2] handle_mm_fault (mm/memory.c:6321) 
[ 14.786951][ C2] ? __pfx_handle_mm_fault (mm/memory.c:6276) 
[ 14.786955][ C2] ? exc_page_fault (./arch/x86/include/asm/irqflags.h:26 ./arch/x86/include/asm/irqflags.h:109 ./arch/x86/include/asm/irqflags.h:151 arch/x86/mm/fault.c:1484 arch/x86/mm/fault.c:1532) 
[ 14.786958][ C2] ? __lock_release (kernel/locking/lockdep.c:5539) 
[ 14.786962][ C2] do_user_addr_fault (arch/x86/mm/fault.c:1337) 
[ 14.786966][ C2] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:745) 
[ 14.786970][ C2] exc_page_fault (./arch/x86/include/asm/irqflags.h:26 ./arch/x86/include/asm/irqflags.h:109 ./arch/x86/include/asm/irqflags.h:151 arch/x86/mm/fault.c:1484 arch/x86/mm/fault.c:1532) 
[ 14.786974][ C2] asm_exc_page_fault (./arch/x86/include/asm/idtentry.h:623) 
[   14.786976][    C2] RIP: 0033:0x563f89a58450
[ 14.786982][ C2] Code: Unable to access opcode bytes at 0x563f89a58426.

Code starting with the faulting instruction
===========================================
[   14.786984][    C2] RSP: 002b:00007fff835c03c8 EFLAGS: 00010206
[   14.786986][    C2] RAX: 0000563f99ca1510 RBX: 0000000000000000 RCX: 0000000000000004
[   14.786987][    C2] RDX: 0000000000000020 RSI: 0000000000000001 RDI: 0000563f99ca1130
[   14.786989][    C2] RBP: 00000000ffffffff R08: 0000563f99ca6900 R09: 0000000000000000
[   14.786991][    C2] R10: 0000000000000008 R11: 4b4b31c5e8f2a2c0 R12: 00000000ffffffff
[   14.786992][    C2] R13: 0000563f99cac980 R14: 0000563f99cacc50 R15: 0000563f99c8e620
| [   14.809476][    C2] RCU nest depth: 4, expected: 0
| [   14.809670][    C2] INFO: lockdep is turned off.
| [   14.809871][    C2] Preemption disabled at:
| [ 14.809873][ C2] 0x0 
[   14.810221][    C2] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[   14.810222][    C2] Call Trace:
[   14.810224][    C2]  <IRQ>
[ 14.810225][ C2] dump_stack_lvl (lib/dump_stack.c:123) 
[ 14.810231][ C2] __might_resched (kernel/sched/core.c:8796) 
[ 14.810238][ C2] down_write (./include/linux/kernel.h:73 kernel/locking/rwsem.c:1576) 
[ 14.810242][ C2] ? __pfx_down_write (kernel/locking/rwsem.c:1575) 
[ 14.810245][ C2] ? simple_recursive_removal (fs/libfs.c:614) 
[ 14.810248][ C2] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:745) 
[ 14.810253][ 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) 
[ 14.810258][ C2] simple_recursive_removal (./include/linux/dcache.h:409 ./include/linux/dcache.h:424 ./include/linux/dcache.h:434 fs/libfs.c:617) 
[ 14.810261][ 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) 
[ 14.810265][ C2] ? __pfx_remove_one (fs/debugfs/inode.c:780) 
[ 14.810269][ C2] debugfs_remove (fs/debugfs/inode.c:806 fs/debugfs/inode.c:799) 
[ 14.810272][ C2] ref_tracker_dir_exit (lib/ref_tracker.c:411 lib/ref_tracker.c:195) 
[ 14.810277][ C2] ? __pfx_ref_tracker_free (lib/ref_tracker.c:253) 
[ 14.810280][ 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) 
[ 14.810285][ C2] ? rcu_do_batch (kernel/rcu/tree.c:2576) 
[ 14.810288][ C2] ? __pfx_ref_tracker_dir_exit (lib/ref_tracker.c:189) 
[ 14.810291][ C2] ? irq_exit_rcu (kernel/softirq.c:698) 
[ 14.810295][ C2] ? sysvec_apic_timer_interrupt (arch/x86/kernel/apic/apic.c:1050 arch/x86/kernel/apic/apic.c:1050) 
[ 14.810299][ C2] ? asm_sysvec_apic_timer_interrupt (./arch/x86/include/asm/idtentry.h:702) 
[ 14.810303][ C2] ? lock_acquire.part.0 (kernel/locking/lockdep.c:5875) 
[ 14.810306][ C2] ? page_ref_add_unless.constprop.0 (./include/linux/rcupdate.h:842 ./include/linux/page_ref.h:235) 
[ 14.810310][ C2] ? next_uptodate_folio (mm/filemap.c:3563) 
[ 14.810312][ C2] ? filemap_map_pages (mm/filemap.c:3746) 
[ 14.810315][ C2] ? do_fault_around (mm/memory.c:5476) 
[ 14.810319][ C2] ? do_pte_missing (mm/memory.c:5509 mm/memory.c:5652 mm/memory.c:4160) 
[ 14.810322][ C2] ? handle_pte_fault (mm/memory.c:5997) 
[ 14.810325][ C2] ? __handle_mm_fault (mm/memory.c:6140) 
[ 14.810331][ C2] __put_net (net/core/net_namespace.c:732) 
[ 14.810333][ C2] __sk_destruct (./include/net/net_namespace.h:288 ./include/net/net_namespace.h:390 net/core/sock.c:2376) 
[ 14.810337][ C2] ? rcu_do_batch (kernel/rcu/tree.c:2576) 
[ 14.810340][ C2] rcu_do_batch (kernel/rcu/tree.c:2576) 
[ 14.810344][ C2] ? __pfx_rcu_do_batch (kernel/rcu/tree.c:2500) 
[ 14.810348][ C2] ? mark_held_locks (kernel/locking/lockdep.c:4328) 
[ 14.810351][ C2] ? note_gp_changes (kernel/rcu/tree.c:1326 (discriminator 1)) 
[ 14.810353][ C2] ? lockdep_hardirqs_on (kernel/locking/lockdep.c:4475) 
[ 14.810357][ C2] rcu_core (kernel/rcu/tree.c:2834) 
[ 14.810361][ C2] handle_softirqs (kernel/softirq.c:579) 
[ 14.810366][ C2] __irq_exit_rcu (kernel/softirq.c:614 kernel/softirq.c:453 kernel/softirq.c:680) 
[ 14.810369][ C2] irq_exit_rcu (kernel/softirq.c:698) 
[ 14.810372][ C2] sysvec_apic_timer_interrupt (arch/x86/kernel/apic/apic.c:1050 arch/x86/kernel/apic/apic.c:1050) 
[   14.810375][    C2]  </IRQ>
[   14.810376][    C2]  <TASK>
[ 14.810378][ C2] asm_sysvec_apic_timer_interrupt (./arch/x86/include/asm/idtentry.h:702) 
[ 14.810380][ C2] RIP: 0010:lock_acquire.part.0 (kernel/locking/lockdep.c:5875) 
[ 14.810384][ C2] Code: ff ff ff 65 0f c1 05 fd 8b 14 05 83 f8 01 0f 85 3e 01 00 00 9c 58 f6 c4 02 0f 85 29 01 00 00 48 85 db 74 01 fb 48 8b 44 24 30 <65> 48 2b 05 6e 4b 14 05 0f 85 3a 01 00 00 48 83 c4 38 5b 5d 41 5c
All code
========
   0:	ff                   	(bad)
   1:	ff                   	(bad)
   2:	ff 65 0f             	jmp    *0xf(%rbp)
   5:	c1 05 fd 8b 14 05 83 	roll   $0x83,0x5148bfd(%rip)        # 0x5148c09
   c:	f8                   	clc
   d:	01 0f                	add    %ecx,(%rdi)
   f:	85 3e                	test   %edi,(%rsi)
  11:	01 00                	add    %eax,(%rax)
  13:	00 9c 58 f6 c4 02 0f 	add    %bl,0xf02c4f6(%rax,%rbx,2)
  1a:	85 29                	test   %ebp,(%rcx)
  1c:	01 00                	add    %eax,(%rax)
  1e:	00 48 85             	add    %cl,-0x7b(%rax)
  21:	db 74 01 fb          	(bad)  -0x5(%rcx,%rax,1)
  25:	48 8b 44 24 30       	mov    0x30(%rsp),%rax
  2a:*	65 48 2b 05 6e 4b 14 	sub    %gs:0x5144b6e(%rip),%rax        # 0x5144ba0		<-- trapping instruction
  31:	05 
  32:	0f 85 3a 01 00 00    	jne    0x172
  38:	48 83 c4 38          	add    $0x38,%rsp
  3c:	5b                   	pop    %rbx
  3d:	5d                   	pop    %rbp
  3e:	41 5c                	pop    %r12

Code starting with the faulting instruction
===========================================
   0:	65 48 2b 05 6e 4b 14 	sub    %gs:0x5144b6e(%rip),%rax        # 0x5144b76
   7:	05 
   8:	0f 85 3a 01 00 00    	jne    0x148
   e:	48 83 c4 38          	add    $0x38,%rsp
  12:	5b                   	pop    %rbx
  13:	5d                   	pop    %rbp
  14:	41 5c                	pop    %r12
[   14.810387][    C2] RSP: 0000:ffffc90000c27920 EFLAGS: 00000206
[   14.810390][    C2] RAX: cdd8fb17449dcf00 RBX: 0000000000000200 RCX: 0000000000000001
[   14.810392][    C2] RDX: 0000000000000000 RSI: ffffffffb027890a RDI: ffffffffafa53be0
[   14.810394][    C2] RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000001
[   14.810395][    C2] R10: 0000000000000000 R11: ffffffffb07775e0 R12: 0000000000000002
[   14.810397][    C2] R13: 0000000000000000 R14: 0000000000000000 R15: ffffffffb07775e0
[ 14.810403][ C2] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:745) 
[ 14.810406][ C2] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5834) 
[ 14.810408][ C2] ? page_ref_add_unless.constprop.0 (./include/linux/rcupdate.h:331 ./include/linux/rcupdate.h:841 ./include/linux/page_ref.h:235) 
[ 14.810412][ C2] page_ref_add_unless.constprop.0 (./include/linux/rcupdate.h:842 ./include/linux/page_ref.h:235) 
[ 14.810415][ C2] ? page_ref_add_unless.constprop.0 (./include/linux/rcupdate.h:331 ./include/linux/rcupdate.h:841 ./include/linux/page_ref.h:235) 
[ 14.810418][ C2] next_uptodate_folio (mm/filemap.c:3563) 
[ 14.810422][ C2] filemap_map_pages (mm/filemap.c:3746) 
[ 14.810430][ C2] ? __pfx_filemap_map_pages (mm/filemap.c:3692) 
[ 14.810435][ C2] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:745) 
[ 14.810438][ C2] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5834) 
[ 14.810441][ C2] ? do_fault_around (./include/linux/rcupdate.h:331 ./include/linux/rcupdate.h:841 mm/memory.c:5475) 
[ 14.810445][ C2] ? __pfx_filemap_map_pages (mm/filemap.c:3692) 
[ 14.810447][ C2] do_fault_around (mm/memory.c:5476) 
[ 14.810452][ C2] do_pte_missing (mm/memory.c:5509 mm/memory.c:5652 mm/memory.c:4160) 
[ 14.810455][ C2] ? rcu_read_unlock (./include/linux/rcupdate.h:341 (discriminator 9) ./include/linux/rcupdate.h:871 (discriminator 9)) 
[ 14.810458][ C2] handle_pte_fault (mm/memory.c:5997) 
[ 14.810462][ C2] ? __pfx_handle_pte_fault (mm/memory.c:5954) 
[ 14.810466][ C2] ? reacquire_held_locks (kernel/locking/lockdep.c:5388) 
[ 14.810469][ C2] ? do_user_addr_fault (arch/x86/mm/fault.c:1327) 
[ 14.810473][ C2] __handle_mm_fault (mm/memory.c:6140) 
[ 14.810477][ C2] ? __pfx___handle_mm_fault (mm/memory.c:6049) 
[ 14.810480][ C2] ? __lock_release (kernel/locking/lockdep.c:5585) 
[ 14.810486][ C2] ? __pfx_lock_vma_under_rcu (mm/memory.c:6547) 
[ 14.810491][ C2] handle_mm_fault (mm/memory.c:6321) 
[ 14.810494][ C2] ? __pfx_handle_mm_fault (mm/memory.c:6276) 
[ 14.810498][ C2] ? exc_page_fault (./arch/x86/include/asm/irqflags.h:26 ./arch/x86/include/asm/irqflags.h:109 ./arch/x86/include/asm/irqflags.h:151 arch/x86/mm/fault.c:1484 arch/x86/mm/fault.c:1532) 
[ 14.810501][ C2] ? __lock_release (kernel/locking/lockdep.c:5539) 
[ 14.810506][ C2] do_user_addr_fault (arch/x86/mm/fault.c:1337) 
[ 14.810509][ C2] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:745) 
[ 14.810513][ C2] exc_page_fault (./arch/x86/include/asm/irqflags.h:26 ./arch/x86/include/asm/irqflags.h:109 ./arch/x86/include/asm/irqflags.h:151 arch/x86/mm/fault.c:1484 arch/x86/mm/fault.c:1532) 
[ 14.810517][ C2] asm_exc_page_fault (./arch/x86/include/asm/idtentry.h:623) 
[   14.810519][    C2] RIP: 0033:0x563f89a58450
[ 14.810523][ C2] Code: Unable to access opcode bytes at 0x563f89a58426.

Code starting with the faulting instruction
===========================================
[   14.810525][    C2] RSP: 002b:00007fff835c03c8 EFLAGS: 00010206
[   14.810527][    C2] RAX: 0000563f99ca1510 RBX: 0000000000000000 RCX: 0000000000000004
[   14.810528][    C2] RDX: 0000000000000020 RSI: 0000000000000001 RDI: 0000563f99ca1130
[   14.810530][    C2] RBP: 00000000ffffffff R08: 0000563f99ca6900 R09: 0000000000000000
[   14.810531][    C2] R10: 0000000000000008 R11: 4b4b31c5e8f2a2c0 R12: 00000000ffffffff
[   14.810533][    C2] R13: 0000563f99cac980 R14: 0000563f99cacc50 R15: 0000563f99c8e620
| [   16.464424][    C2] INFO: lockdep is turned off.
| [   16.464607][    C2] Preemption disabled at:
| [ 16.464608][ C2] 0x0 
| [   16.464955][    C2] Tainted: [W]=WARN
[   16.464956][    C2] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[   16.464958][    C2] Call Trace:
[   16.464960][    C2]  <IRQ>
[ 16.464962][ C2] dump_stack_lvl (lib/dump_stack.c:123) 
[ 16.464971][ C2] __might_resched (kernel/sched/core.c:8796) 
[ 16.464978][ C2] down_write (./include/linux/kernel.h:73 kernel/locking/rwsem.c:1576) 
[ 16.464983][ C2] ? __pfx_down_write (kernel/locking/rwsem.c:1575) 
[ 16.464985][ C2] ? simple_recursive_removal (fs/libfs.c:614) 
[ 16.464990][ C2] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:745) 
[ 16.464995][ 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) 
[ 16.465001][ C2] simple_recursive_removal (./include/linux/dcache.h:409 ./include/linux/dcache.h:424 ./include/linux/dcache.h:434 fs/libfs.c:617) 
[ 16.465004][ 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) 
[ 16.465007][ C2] ? __pfx_remove_one (fs/debugfs/inode.c:780) 
[ 16.465013][ C2] debugfs_remove (fs/debugfs/inode.c:806 fs/debugfs/inode.c:799) 
[ 16.465016][ C2] ref_tracker_dir_exit (lib/ref_tracker.c:411 lib/ref_tracker.c:195) 
[ 16.465022][ C2] ? __pfx_ref_tracker_free (lib/ref_tracker.c:253) 
[ 16.465026][ 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) 
[ 16.465032][ C2] ? rcu_do_batch (kernel/rcu/tree.c:2576) 
[ 16.465035][ C2] ? __pfx_ref_tracker_dir_exit (lib/ref_tracker.c:189) 
[ 16.465038][ C2] ? irq_exit_rcu (kernel/softirq.c:698) 
[ 16.465043][ C2] ? sysvec_apic_timer_interrupt (arch/x86/kernel/apic/apic.c:1050 arch/x86/kernel/apic/apic.c:1050) 
[ 16.465048][ C2] ? asm_sysvec_apic_timer_interrupt (./arch/x86/include/asm/idtentry.h:702) 
[ 16.465052][ C2] ? pv_native_safe_halt (arch/x86/kernel/paravirt.c:82) 
[ 16.465055][ C2] ? default_idle (./arch/x86/include/asm/paravirt.h:107 arch/x86/kernel/process.c:743) 
[ 16.465058][ C2] ? default_idle_call (./include/linux/cpuidle.h:143 kernel/sched/idle.c:118) 
[ 16.465061][ C2] ? cpuidle_idle_call (kernel/sched/idle.c:186) 
[ 16.465065][ C2] ? do_idle (kernel/sched/idle.c:325) 
[ 16.465067][ C2] ? cpu_startup_entry (kernel/sched/idle.c:422 (discriminator 1)) 
[ 16.465070][ C2] ? start_secondary (arch/x86/kernel/smpboot.c:203 arch/x86/kernel/smpboot.c:283) 
[ 16.465074][ C2] ? common_startup_64 (arch/x86/kernel/head_64.S:419) 
[ 16.465079][ C2] ? bpf_sk_storage_free (./include/linux/rcupdate.h:341 ./include/linux/rcupdate.h:871 net/core/bpf_sk_storage.c:61) 
[ 16.465083][ C2] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:745) 
[ 16.465087][ C2] __put_net (net/core/net_namespace.c:732) 
[ 16.465091][ C2] __sk_destruct (./include/net/net_namespace.h:288 ./include/net/net_namespace.h:390 net/core/sock.c:2376) 
[ 16.465095][ C2] ? rcu_do_batch (kernel/rcu/tree.c:2576) 
[ 16.465097][ C2] rcu_do_batch (kernel/rcu/tree.c:2576) 
[ 16.465102][ C2] ? __pfx_rcu_do_batch (kernel/rcu/tree.c:2500) 
[ 16.465105][ C2] ? trace_irq_enable.constprop.0 (./include/trace/events/preemptirq.h:40) 
[ 16.465112][ C2] ? _raw_spin_unlock_irqrestore (./arch/x86/include/asm/preempt.h:104 ./include/linux/spinlock_api_smp.h:152 kernel/locking/spinlock.c:194) 
[ 16.465117][ C2] rcu_core (kernel/rcu/tree.c:2834) 
[ 16.465122][ C2] handle_softirqs (kernel/softirq.c:579) 
[ 16.465127][ C2] __irq_exit_rcu (kernel/softirq.c:614 kernel/softirq.c:453 kernel/softirq.c:680) 
[ 16.465130][ C2] irq_exit_rcu (kernel/softirq.c:698) 
[ 16.465133][ C2] sysvec_apic_timer_interrupt (arch/x86/kernel/apic/apic.c:1050 arch/x86/kernel/apic/apic.c:1050) 
[   16.465137][    C2]  </IRQ>
[   16.465138][    C2]  <TASK>
[ 16.465139][ C2] asm_sysvec_apic_timer_interrupt (./arch/x86/include/asm/idtentry.h:702) 
[ 16.465142][ C2] RIP: 0010:pv_native_safe_halt (arch/x86/kernel/paravirt.c:82) 
[ 16.465146][ 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
[   16.465149][    C2] RSP: 0018:ffffc90000147de8 EFLAGS: 00000246
[   16.465152][    C2] RAX: 0000000000000002 RBX: 1ffff92000028fc1 RCX: ffffffffaf78f5d9
[   16.465154][    C2] RDX: ffffed1006c266fb RSI: ffffffffafa53b60 RDI: ffffffffacf8d18f
[   16.465156][    C2] RBP: 0000000000000000 R08: 0000000000000000 R09: ffffed1006c266fa
[   16.465158][    C2] R10: ffff8880361337d3 R11: ffff88800a17cad8 R12: 0000000000000000
[   16.465160][    C2] R13: ffff888001bf2300 R14: dffffc0000000000 R15: 0000000000000000
[ 16.465164][ C2] ? ct_kernel_exit.constprop.0 (kernel/context_tracking.c:146) 
[ 16.465167][ C2] ? cpuidle_idle_call (kernel/sched/idle.c:186) 
[ 16.465170][ C2] default_idle (./arch/x86/include/asm/paravirt.h:107 arch/x86/kernel/process.c:743) 
[ 16.465173][ C2] default_idle_call (./include/linux/cpuidle.h:143 kernel/sched/idle.c:118) 
[ 16.465176][ C2] cpuidle_idle_call (kernel/sched/idle.c:186) 
[ 16.465179][ C2] ? __pfx_cpuidle_idle_call (kernel/sched/idle.c:168) 
[ 16.465183][ C2] ? tsc_verify_tsc_adjust (arch/x86/kernel/tsc_sync.c:60) 
[ 16.465187][ C2] do_idle (kernel/sched/idle.c:325) 
[ 16.465191][ C2] cpu_startup_entry (kernel/sched/idle.c:422 (discriminator 1)) 
[ 16.465193][ C2] start_secondary (arch/x86/kernel/smpboot.c:203 arch/x86/kernel/smpboot.c:283) 
[ 16.465196][ C2] ? __pfx_start_secondary (arch/x86/kernel/smpboot.c:233) 


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