======================================
| [ 15.585357][ C2] #0: ffffffff981775e0 (rcu_read_lock){....}-{1:3}, at: 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) 
| [ 15.585763][ C2] #1: ffffffff981774c0 (rcu_callback){....}-{0:0}, at: rcu_do_batch (./include/linux/rcupdate.h:331 kernel/rcu/tree.c:2570) 
| [   15.586154][    C2]
| [   15.586154][    C2] stack backtrace:
[   15.586432][    C2] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[   15.586434][    C2] Call Trace:
[   15.586436][    C2]  <IRQ>
[ 15.586438][ C2] dump_stack_lvl (lib/dump_stack.c:123) 
[ 15.586444][ C2] print_usage_bug.part.0 (kernel/locking/lockdep.c:4048) 
[ 15.586448][ C2] mark_lock_irq (kernel/locking/lockdep.c:4013 kernel/locking/lockdep.c:4059 kernel/locking/lockdep.c:4270) 
[ 15.586452][ C2] ? __pfx_unwind_next_frame (arch/x86/kernel/unwind_orc.c:469) 
[ 15.586456][ C2] ? save_trace (kernel/locking/lockdep.c:595) 
[ 15.586462][ C2] mark_lock (kernel/locking/lockdep.c:4756) 
[ 15.586466][ C2] mark_usage (kernel/locking/lockdep.c:4645) 
[ 15.586469][ C2] __lock_acquire (kernel/locking/lockdep.c:5194) 
[ 15.586472][ C2] ? __lock_acquire (kernel/locking/lockdep.c:5240) 
[ 15.586476][ C2] lock_acquire.part.0 (kernel/locking/lockdep.c:473 kernel/locking/lockdep.c:5873) 
[ 15.586479][ C2] ? simple_pin_fs (fs/libfs.c:1067) 
[ 15.586483][ C2] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:745) 
[ 15.586487][ C2] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5834) 
[ 15.586489][ C2] ? simple_pin_fs (fs/libfs.c:1067) 
[ 15.586494][ C2] _raw_spin_lock (./include/linux/spinlock_api_smp.h:134 kernel/locking/spinlock.c:154) 
[ 15.586497][ C2] ? simple_pin_fs (fs/libfs.c:1067) 
[ 15.586500][ C2] simple_pin_fs (fs/libfs.c:1067) 
[ 15.586505][ C2] debugfs_remove (fs/debugfs/inode.c:805 fs/debugfs/inode.c:799) 
[ 15.586508][ C2] ref_tracker_dir_exit (lib/ref_tracker.c:411 lib/ref_tracker.c:195) 
[ 15.586513][ C2] ? __pfx_ref_tracker_free (lib/ref_tracker.c:253) 
[ 15.586517][ 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) 
[ 15.586523][ C2] ? rcu_do_batch (kernel/rcu/tree.c:2576) 
[ 15.586525][ C2] ? __pfx_ref_tracker_dir_exit (lib/ref_tracker.c:189) 
[ 15.586529][ C2] ? irq_exit_rcu (kernel/softirq.c:698) 
[ 15.586531][ C2] ? sysvec_apic_timer_interrupt (arch/x86/kernel/apic/apic.c:1050 arch/x86/kernel/apic/apic.c:1050) 
[ 15.586536][ C2] ? asm_sysvec_apic_timer_interrupt (./arch/x86/include/asm/idtentry.h:702) 
[ 15.586540][ C2] ? unwind_next_frame (arch/x86/kernel/unwind_orc.c:664) 
[ 15.586542][ C2] ? arch_stack_walk (arch/x86/kernel/stacktrace.c:24) 
[ 15.586547][ C2] ? stack_trace_save (kernel/stacktrace.c:123) 
[ 15.586549][ C2] ? kasan_save_stack (mm/kasan/common.c:48) 
[ 15.586554][ C2] ? kasan_save_track (./arch/x86/include/asm/current.h:25 mm/kasan/common.c:60 mm/kasan/common.c:69) 
[ 15.586557][ C2] ? __kasan_slab_alloc (mm/kasan/common.c:348) 
[ 15.586560][ C2] ? kmem_cache_alloc_noprof (./include/linux/kasan.h:250 mm/slub.c:4147 mm/slub.c:4196 mm/slub.c:4203) 
[ 15.586564][ C2] ? __alloc_object (mm/kmemleak.c:481 mm/kmemleak.c:661) 
[ 15.586571][ C2] __put_net (net/core/net_namespace.c:732) 
[ 15.586574][ C2] __sk_destruct (./include/net/net_namespace.h:288 ./include/net/net_namespace.h:390 net/core/sock.c:2376) 
[ 15.586578][ C2] ? rcu_do_batch (kernel/rcu/tree.c:2576) 
[ 15.586581][ C2] rcu_do_batch (kernel/rcu/tree.c:2576) 
[ 15.586585][ C2] ? __pfx_rcu_do_batch (kernel/rcu/tree.c:2500) 
[ 15.586589][ C2] ? note_gp_changes (kernel/rcu/tree.c:1326 (discriminator 1)) 
[ 15.586592][ C2] ? lockdep_hardirqs_on (kernel/locking/lockdep.c:4475) 
[ 15.586597][ C2] rcu_core (kernel/rcu/tree.c:2834) 
[ 15.586601][ C2] handle_softirqs (kernel/softirq.c:579) 
[ 15.586606][ C2] __irq_exit_rcu (kernel/softirq.c:614 kernel/softirq.c:453 kernel/softirq.c:680) 
[ 15.586609][ C2] irq_exit_rcu (kernel/softirq.c:698) 
[ 15.586612][ C2] sysvec_apic_timer_interrupt (arch/x86/kernel/apic/apic.c:1050 arch/x86/kernel/apic/apic.c:1050) 
[   15.586616][    C2]  </IRQ>
[   15.586617][    C2]  <TASK>
[ 15.586618][ C2] asm_sysvec_apic_timer_interrupt (./arch/x86/include/asm/idtentry.h:702) 
[ 15.586621][ C2] RIP: 0010:unwind_next_frame (arch/x86/kernel/unwind_orc.c:664) 
[ 15.586624][ C2] Code: 48 89 fa 48 c1 ea 03 80 3c 02 00 0f 85 58 08 00 00 4d 89 65 50 48 b8 00 00 00 00 00 fc ff df 4c 89 ea 48 c1 ea 03 0f b6 04 02 <84> c0 74 08 3c 03 0f 8e 3d 08 00 00 41 3b 6d 00 0f 84 8b 01 00 00
All code
========
   0:	48 89 fa             	mov    %rdi,%rdx
   3:	48 c1 ea 03          	shr    $0x3,%rdx
   7:	80 3c 02 00          	cmpb   $0x0,(%rdx,%rax,1)
   b:	0f 85 58 08 00 00    	jne    0x869
  11:	4d 89 65 50          	mov    %r12,0x50(%r13)
  15:	48 b8 00 00 00 00 00 	movabs $0xdffffc0000000000,%rax
  1c:	fc ff df 
  1f:	4c 89 ea             	mov    %r13,%rdx
  22:	48 c1 ea 03          	shr    $0x3,%rdx
  26:	0f b6 04 02          	movzbl (%rdx,%rax,1),%eax
  2a:*	84 c0                	test   %al,%al		<-- trapping instruction
  2c:	74 08                	je     0x36
  2e:	3c 03                	cmp    $0x3,%al
  30:	0f 8e 3d 08 00 00    	jle    0x873
  36:	41 3b 6d 00          	cmp    0x0(%r13),%ebp
  3a:	0f 84 8b 01 00 00    	je     0x1cb

Code starting with the faulting instruction
===========================================
   0:	84 c0                	test   %al,%al
   2:	74 08                	je     0xc
   4:	3c 03                	cmp    $0x3,%al
   6:	0f 8e 3d 08 00 00    	jle    0x849
   c:	41 3b 6d 00          	cmp    0x0(%r13),%ebp
  10:	0f 84 8b 01 00 00    	je     0x1a1
[   15.586627][    C2] RSP: 0018:ffffc900006e7598 EFLAGS: 00000a02
[   15.586630][    C2] RAX: 0000000000000000 RBX: 1ffff920000dcebc RCX: 0000000000000001
[   15.586632][    C2] RDX: 1ffff920000dced3 RSI: 0000000000000004 RDI: ffffc900006e7698
[   15.586634][    C2] RBP: 0000000000000001 R08: 0000000000000000 R09: ffffc900006e76d9
[   15.586636][    C2] R10: 0000000000000000 R11: ffffc900006e76d8 R12: ffffffff990953af
[   15.586637][    C2] R13: ffffc900006e7698 R14: ffffffff990953aa R15: ffffc900006e79f0
[ 15.586643][ C2] ? unwind_next_frame (arch/x86/kernel/unwind_orc.c:643) 
[ 15.586646][ C2] ? kasan_save_track (./arch/x86/include/asm/current.h:25 mm/kasan/common.c:60 mm/kasan/common.c:69) 
[ 15.586651][ C2] ? __pfx_unwind_next_frame (arch/x86/kernel/unwind_orc.c:469) 
[ 15.586655][ C2] ? kasan_save_track (./arch/x86/include/asm/current.h:25 mm/kasan/common.c:60 mm/kasan/common.c:69) 
[ 15.586657][ C2] ? kernel_text_address (kernel/extable.c:99) 
[ 15.586661][ C2] ? __pfx_stack_trace_consume_entry (kernel/stacktrace.c:83) 
[ 15.586664][ C2] arch_stack_walk (arch/x86/kernel/stacktrace.c:24) 
[ 15.586670][ C2] ? __kasan_slab_alloc (mm/kasan/common.c:348) 
[ 15.586674][ C2] stack_trace_save (kernel/stacktrace.c:123) 
[ 15.586677][ C2] ? __pfx_stack_trace_save (kernel/stacktrace.c:114) 
[ 15.586680][ C2] ? validate_chain (kernel/locking/lockdep.c:3804 kernel/locking/lockdep.c:3824 kernel/locking/lockdep.c:3879) 
[ 15.586684][ C2] kasan_save_stack (mm/kasan/common.c:48) 
[ 15.586687][ C2] ? kasan_save_stack (mm/kasan/common.c:48) 
[ 15.586690][ C2] ? kasan_save_track (./arch/x86/include/asm/current.h:25 mm/kasan/common.c:60 mm/kasan/common.c:69) 
[ 15.586694][ C2] ? check_bytes_and_report (mm/slub.c:1212) 
[ 15.586698][ C2] ? find_held_lock (kernel/locking/lockdep.c:5353) 
[ 15.586701][ C2] ? get_partial_node.part.0 (mm/slub.c:2902) 
[ 15.586704][ C2] ? __lock_release (kernel/locking/lockdep.c:5539) 
[ 15.586707][ C2] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:745) 
[ 15.586710][ C2] ? _raw_spin_unlock_irqrestore (./include/linux/spinlock_api_smp.h:151 kernel/locking/spinlock.c:194) 
[ 15.586714][ C2] ? lockdep_hardirqs_on (kernel/locking/lockdep.c:4475) 
[ 15.586716][ C2] ? _raw_spin_unlock_irqrestore (./arch/x86/include/asm/preempt.h:104 ./include/linux/spinlock_api_smp.h:152 kernel/locking/spinlock.c:194) 
[ 15.586720][ C2] ? get_partial_node.part.0 (mm/slub.c:2902) 
[ 15.586725][ C2] ? ___slab_alloc (mm/slub.c:2863 mm/slub.c:2980 mm/slub.c:3838) 
[ 15.586728][ C2] ? __alloc_object (mm/kmemleak.c:481 mm/kmemleak.c:661) 
[ 15.586734][ C2] kasan_save_track (./arch/x86/include/asm/current.h:25 mm/kasan/common.c:60 mm/kasan/common.c:69) 
[ 15.586737][ C2] __kasan_slab_alloc (mm/kasan/common.c:348) 
[ 15.586740][ C2] kmem_cache_alloc_noprof (./include/linux/kasan.h:250 mm/slub.c:4147 mm/slub.c:4196 mm/slub.c:4203) 
[ 15.586744][ C2] ? alloc_empty_file (fs/file_table.c:234) 
[ 15.586748][ C2] __alloc_object (mm/kmemleak.c:481 mm/kmemleak.c:661) 
[ 15.586752][ C2] __create_object (mm/kmemleak.c:770) 
[ 15.586756][ C2] kmem_cache_alloc_noprof (./include/linux/kmemleak.h:43 mm/slub.c:4151 mm/slub.c:4196 mm/slub.c:4203) 
[ 15.586759][ C2] ? __kernel_text_address (kernel/extable.c:79) 
[ 15.586762][ C2] ? unwind_get_return_address (arch/x86/kernel/unwind_orc.c:369 arch/x86/kernel/unwind_orc.c:364) 
[ 15.586766][ C2] alloc_empty_file (fs/file_table.c:234) 
[ 15.586769][ C2] path_openat (fs/namei.c:4032) 
[ 15.586773][ C2] ? __pfx_path_openat (fs/namei.c:4028) 
[ 15.586775][ C2] ? validate_chain (kernel/locking/lockdep.c:3804 kernel/locking/lockdep.c:3824 kernel/locking/lockdep.c:3879) 
[ 15.586780][ C2] do_filp_open (fs/namei.c:4073) 
[ 15.586784][ C2] ? __pfx_do_filp_open (fs/namei.c:4067) 
[ 15.586787][ C2] ? __lock_acquire (kernel/locking/lockdep.c:5240) 
[ 15.586792][ C2] ? find_held_lock (kernel/locking/lockdep.c:5353) 
[ 15.586795][ C2] ? alloc_fd (fs/file.c:597) 
[ 15.586798][ C2] ? __lock_release (kernel/locking/lockdep.c:5539) 
[ 15.586802][ 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) 
[ 15.586806][ C2] ? _raw_spin_unlock (./arch/x86/include/asm/preempt.h:104 ./include/linux/spinlock_api_smp.h:143 kernel/locking/spinlock.c:186) 
[ 15.586810][ C2] ? alloc_fd (fs/file.c:597) 
[ 15.586814][ C2] do_sys_openat2 (fs/open.c:1437) 
[ 15.586818][ C2] ? __pfx_do_sys_openat2 (fs/open.c:1422) 
[ 15.586822][ C2] ? find_held_lock (kernel/locking/lockdep.c:5353) 
[ 15.586827][ C2] __x64_sys_openat (fs/open.c:1463) 
[ 15.586830][ 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) 
[ 15.586834][ C2] ? __pfx___x64_sys_openat (fs/open.c:1463) 
[ 15.586838][ C2] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:745) 
[ 15.586841][ C2] ? do_syscall_64 (./arch/x86/include/asm/irqflags.h:42 ./arch/x86/include/asm/irqflags.h:119 ./include/linux/entry-common.h:199 arch/x86/entry/syscall_64.c:90) 
[ 15.586845][ C2] do_syscall_64 (arch/x86/entry/syscall_64.c:63 arch/x86/entry/syscall_64.c:94) 
[ 15.586848][ C2] entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:130) 
[   15.586851][    C2] RIP: 0033:0x7f8f54a1182b
[ 15.586854][ C2] Code: 25 00 00 41 00 3d 00 00 41 00 74 4b 64 8b 04 25 18 00 00 00 85 c0 75 67 44 89 e2 48 89 ee bf 9c ff ff ff b8 01 01 00 00 0f 05 <48> 3d 00 f0 ff ff 0f 87 91 00 00 00 48 8b 54 24 28 64 48 2b 14 25
All code
========
   0:	25 00 00 41 00       	and    $0x410000,%eax
   5:	3d 00 00 41 00       	cmp    $0x410000,%eax
   a:	74 4b                	je     0x57
   c:	64 8b 04 25 18 00 00 	mov    %fs:0x18,%eax
  13:	00 
  14:	85 c0                	test   %eax,%eax
  16:	75 67                	jne    0x7f
  18:	44 89 e2             	mov    %r12d,%edx
  1b:	48 89 ee             	mov    %rbp,%rsi
  1e:	bf 9c ff ff ff       	mov    $0xffffff9c,%edi
  23:	b8 01 01 00 00       	mov    $0x101,%eax
  28:	0f 05                	syscall
  2a:*	48 3d 00 f0 ff ff    	cmp    $0xfffffffffffff000,%rax		<-- trapping instruction
  30:	0f 87 91 00 00 00    	ja     0xc7
  36:	48 8b 54 24 28       	mov    0x28(%rsp),%rdx
  3b:	64                   	fs
  3c:	48                   	rex.W
  3d:	2b                   	.byte 0x2b
  3e:	14 25                	adc    $0x25,%al

Code starting with the faulting instruction
===========================================
   0:	48 3d 00 f0 ff ff    	cmp    $0xfffffffffffff000,%rax
   6:	0f 87 91 00 00 00    	ja     0x9d
   c:	48 8b 54 24 28       	mov    0x28(%rsp),%rdx
  11:	64                   	fs
  12:	48                   	rex.W
  13:	2b                   	.byte 0x2b
  14:	14 25                	adc    $0x25,%al
[   15.586856][    C2] RSP: 002b:00007ffc0ef6ffc0 EFLAGS: 00000246 ORIG_RAX: 0000000000000101
[   15.586859][    C2] RAX: ffffffffffffffda RBX: 0000556f150ce380 RCX: 00007f8f54a1182b
[   15.586861][    C2] RDX: 0000000000000241 RSI: 0000556f150d6a40 RDI: 00000000ffffff9c
[   15.586863][    C2] RBP: 0000556f150d6a40 R08: 0000000000000000 R09: 0000000000000020
[   15.586864][    C2] R10: 00000000000001b6 R11: 0000000000000246 R12: 0000000000000241
[   15.586866][    C2] R13: 0000000000000001 R14: 0000556f150d6a40 R15: 00007f8f548d06c0
| [   15.617248][    C2] RCU nest depth: 1, expected: 0
| [   15.617468][    C2] INFO: lockdep is turned off.
| [   15.617675][    C2] Preemption disabled at:
| [ 15.617676][ C2] handle_softirqs (kernel/softirq.c:553) 
[   15.618108][    C2] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[   15.618110][    C2] Call Trace:
[   15.618112][    C2]  <IRQ>
[ 15.618113][ C2] dump_stack_lvl (lib/dump_stack.c:123) 
[ 15.618120][ C2] __might_resched (kernel/sched/core.c:8796) 
[ 15.618126][ C2] down_write (./include/linux/kernel.h:73 kernel/locking/rwsem.c:1576) 
[ 15.618131][ C2] ? __pfx_down_write (kernel/locking/rwsem.c:1575) 
[ 15.618133][ C2] ? simple_recursive_removal (fs/libfs.c:614) 
[ 15.618137][ C2] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:745) 
[ 15.618142][ 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) 
[ 15.618147][ C2] simple_recursive_removal (./include/linux/dcache.h:409 ./include/linux/dcache.h:424 ./include/linux/dcache.h:434 fs/libfs.c:617) 
[ 15.618150][ 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) 
[ 15.618153][ C2] ? __pfx_remove_one (fs/debugfs/inode.c:780) 
[ 15.618159][ C2] debugfs_remove (fs/debugfs/inode.c:806 fs/debugfs/inode.c:799) 
[ 15.618162][ C2] ref_tracker_dir_exit (lib/ref_tracker.c:411 lib/ref_tracker.c:195) 
[ 15.618167][ C2] ? __pfx_ref_tracker_free (lib/ref_tracker.c:253) 
[ 15.618170][ 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) 
[ 15.618175][ C2] ? rcu_do_batch (kernel/rcu/tree.c:2576) 
[ 15.618178][ C2] ? __pfx_ref_tracker_dir_exit (lib/ref_tracker.c:189) 
[ 15.618181][ C2] ? irq_exit_rcu (kernel/softirq.c:698) 
[ 15.618184][ C2] ? sysvec_apic_timer_interrupt (arch/x86/kernel/apic/apic.c:1050 arch/x86/kernel/apic/apic.c:1050) 
[ 15.618189][ C2] ? asm_sysvec_apic_timer_interrupt (./arch/x86/include/asm/idtentry.h:702) 
[ 15.618192][ C2] ? unwind_next_frame (arch/x86/kernel/unwind_orc.c:664) 
[ 15.618196][ C2] ? arch_stack_walk (arch/x86/kernel/stacktrace.c:24) 
[ 15.618200][ C2] ? stack_trace_save (kernel/stacktrace.c:123) 
[ 15.618203][ C2] ? kasan_save_stack (mm/kasan/common.c:48) 
[ 15.618207][ C2] ? kasan_save_track (./arch/x86/include/asm/current.h:25 mm/kasan/common.c:60 mm/kasan/common.c:69) 
[ 15.618210][ C2] ? __kasan_slab_alloc (mm/kasan/common.c:348) 
[ 15.618213][ C2] ? kmem_cache_alloc_noprof (./include/linux/kasan.h:250 mm/slub.c:4147 mm/slub.c:4196 mm/slub.c:4203) 
[ 15.618217][ C2] ? __alloc_object (mm/kmemleak.c:481 mm/kmemleak.c:661) 
[ 15.618224][ C2] __put_net (net/core/net_namespace.c:732) 
[ 15.618227][ C2] __sk_destruct (./include/net/net_namespace.h:288 ./include/net/net_namespace.h:390 net/core/sock.c:2376) 
[ 15.618231][ C2] ? rcu_do_batch (kernel/rcu/tree.c:2576) 
[ 15.618233][ C2] rcu_do_batch (kernel/rcu/tree.c:2576) 
[ 15.618238][ C2] ? __pfx_rcu_do_batch (kernel/rcu/tree.c:2500) 
[ 15.618242][ C2] ? note_gp_changes (kernel/rcu/tree.c:1326 (discriminator 1)) 
[ 15.618245][ C2] ? lockdep_hardirqs_on (kernel/locking/lockdep.c:4475) 
[ 15.618248][ C2] rcu_core (kernel/rcu/tree.c:2834) 
[ 15.618252][ C2] handle_softirqs (kernel/softirq.c:579) 
[ 15.618257][ C2] __irq_exit_rcu (kernel/softirq.c:614 kernel/softirq.c:453 kernel/softirq.c:680) 
[ 15.618260][ C2] irq_exit_rcu (kernel/softirq.c:698) 
[ 15.618263][ C2] sysvec_apic_timer_interrupt (arch/x86/kernel/apic/apic.c:1050 arch/x86/kernel/apic/apic.c:1050) 
[   15.618267][    C2]  </IRQ>
[   15.618268][    C2]  <TASK>
[ 15.618269][ C2] asm_sysvec_apic_timer_interrupt (./arch/x86/include/asm/idtentry.h:702) 
[ 15.618272][ C2] RIP: 0010:unwind_next_frame (arch/x86/kernel/unwind_orc.c:664) 
[ 15.618275][ C2] Code: 48 89 fa 48 c1 ea 03 80 3c 02 00 0f 85 58 08 00 00 4d 89 65 50 48 b8 00 00 00 00 00 fc ff df 4c 89 ea 48 c1 ea 03 0f b6 04 02 <84> c0 74 08 3c 03 0f 8e 3d 08 00 00 41 3b 6d 00 0f 84 8b 01 00 00
All code
========
   0:	48 89 fa             	mov    %rdi,%rdx
   3:	48 c1 ea 03          	shr    $0x3,%rdx
   7:	80 3c 02 00          	cmpb   $0x0,(%rdx,%rax,1)
   b:	0f 85 58 08 00 00    	jne    0x869
  11:	4d 89 65 50          	mov    %r12,0x50(%r13)
  15:	48 b8 00 00 00 00 00 	movabs $0xdffffc0000000000,%rax
  1c:	fc ff df 
  1f:	4c 89 ea             	mov    %r13,%rdx
  22:	48 c1 ea 03          	shr    $0x3,%rdx
  26:	0f b6 04 02          	movzbl (%rdx,%rax,1),%eax
  2a:*	84 c0                	test   %al,%al		<-- trapping instruction
  2c:	74 08                	je     0x36
  2e:	3c 03                	cmp    $0x3,%al
  30:	0f 8e 3d 08 00 00    	jle    0x873
  36:	41 3b 6d 00          	cmp    0x0(%r13),%ebp
  3a:	0f 84 8b 01 00 00    	je     0x1cb

Code starting with the faulting instruction
===========================================
   0:	84 c0                	test   %al,%al
   2:	74 08                	je     0xc
   4:	3c 03                	cmp    $0x3,%al
   6:	0f 8e 3d 08 00 00    	jle    0x849
   c:	41 3b 6d 00          	cmp    0x0(%r13),%ebp
  10:	0f 84 8b 01 00 00    	je     0x1a1
[   15.618278][    C2] RSP: 0018:ffffc900006e7598 EFLAGS: 00000a02
[   15.618281][    C2] RAX: 0000000000000000 RBX: 1ffff920000dcebc RCX: 0000000000000001
[   15.618283][    C2] RDX: 1ffff920000dced3 RSI: 0000000000000004 RDI: ffffc900006e7698
[   15.618285][    C2] RBP: 0000000000000001 R08: 0000000000000000 R09: ffffc900006e76d9
[   15.618287][    C2] R10: 0000000000000000 R11: ffffc900006e76d8 R12: ffffffff990953af
[   15.618289][    C2] R13: ffffc900006e7698 R14: ffffffff990953aa R15: ffffc900006e79f0
[ 15.618295][ C2] ? unwind_next_frame (arch/x86/kernel/unwind_orc.c:643) 
[ 15.618298][ C2] ? kasan_save_track (./arch/x86/include/asm/current.h:25 mm/kasan/common.c:60 mm/kasan/common.c:69) 
[ 15.618302][ C2] ? __pfx_unwind_next_frame (arch/x86/kernel/unwind_orc.c:469) 
[ 15.618306][ C2] ? kasan_save_track (./arch/x86/include/asm/current.h:25 mm/kasan/common.c:60 mm/kasan/common.c:69) 
[ 15.618309][ C2] ? kernel_text_address (kernel/extable.c:99) 
[ 15.618312][ C2] ? __pfx_stack_trace_consume_entry (kernel/stacktrace.c:83) 
[ 15.618316][ C2] arch_stack_walk (arch/x86/kernel/stacktrace.c:24) 
[ 15.618321][ C2] ? __kasan_slab_alloc (mm/kasan/common.c:348) 
[ 15.618325][ C2] stack_trace_save (kernel/stacktrace.c:123) 
[ 15.618328][ C2] ? __pfx_stack_trace_save (kernel/stacktrace.c:114) 
[ 15.618331][ C2] ? validate_chain (kernel/locking/lockdep.c:3804 kernel/locking/lockdep.c:3824 kernel/locking/lockdep.c:3879) 
[ 15.618335][ C2] kasan_save_stack (mm/kasan/common.c:48) 
[ 15.618338][ C2] ? kasan_save_stack (mm/kasan/common.c:48) 
[ 15.618341][ C2] ? kasan_save_track (./arch/x86/include/asm/current.h:25 mm/kasan/common.c:60 mm/kasan/common.c:69) 
[ 15.618345][ C2] ? check_bytes_and_report (mm/slub.c:1212) 
[ 15.618349][ C2] ? find_held_lock (kernel/locking/lockdep.c:5353) 
[ 15.618354][ C2] ? get_partial_node.part.0 (mm/slub.c:2902) 
[ 15.618356][ C2] ? __lock_release (kernel/locking/lockdep.c:5539) 
[ 15.618360][ C2] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:745) 
[ 15.618363][ C2] ? _raw_spin_unlock_irqrestore (./include/linux/spinlock_api_smp.h:151 kernel/locking/spinlock.c:194) 
[ 15.618367][ C2] ? lockdep_hardirqs_on (kernel/locking/lockdep.c:4475) 
[ 15.618369][ C2] ? _raw_spin_unlock_irqrestore (./arch/x86/include/asm/preempt.h:104 ./include/linux/spinlock_api_smp.h:152 kernel/locking/spinlock.c:194) 
[ 15.618373][ C2] ? get_partial_node.part.0 (mm/slub.c:2902) 
[ 15.618378][ C2] ? ___slab_alloc (mm/slub.c:2863 mm/slub.c:2980 mm/slub.c:3838) 
[ 15.618381][ C2] ? __alloc_object (mm/kmemleak.c:481 mm/kmemleak.c:661) 
[ 15.618387][ C2] kasan_save_track (./arch/x86/include/asm/current.h:25 mm/kasan/common.c:60 mm/kasan/common.c:69) 
[ 15.618390][ C2] __kasan_slab_alloc (mm/kasan/common.c:348) 
[ 15.618393][ C2] kmem_cache_alloc_noprof (./include/linux/kasan.h:250 mm/slub.c:4147 mm/slub.c:4196 mm/slub.c:4203) 
[ 15.618397][ C2] ? alloc_empty_file (fs/file_table.c:234) 
[ 15.618403][ C2] __alloc_object (mm/kmemleak.c:481 mm/kmemleak.c:661) 
[ 15.618406][ C2] __create_object (mm/kmemleak.c:770) 
[ 15.618411][ C2] kmem_cache_alloc_noprof (./include/linux/kmemleak.h:43 mm/slub.c:4151 mm/slub.c:4196 mm/slub.c:4203) 
[ 15.618413][ C2] ? __kernel_text_address (kernel/extable.c:79) 
[ 15.618416][ C2] ? unwind_get_return_address (arch/x86/kernel/unwind_orc.c:369 arch/x86/kernel/unwind_orc.c:364) 
[ 15.618422][ C2] alloc_empty_file (fs/file_table.c:234) 
[ 15.618425][ C2] path_openat (fs/namei.c:4032) 
[ 15.618429][ C2] ? __pfx_path_openat (fs/namei.c:4028) 
[ 15.618431][ C2] ? validate_chain (kernel/locking/lockdep.c:3804 kernel/locking/lockdep.c:3824 kernel/locking/lockdep.c:3879) 
[ 15.618436][ C2] do_filp_open (fs/namei.c:4073) 
[ 15.618439][ C2] ? __pfx_do_filp_open (fs/namei.c:4067) 
[ 15.618443][ C2] ? __lock_acquire (kernel/locking/lockdep.c:5240) 
[ 15.618448][ C2] ? find_held_lock (kernel/locking/lockdep.c:5353) 
[ 15.618451][ C2] ? alloc_fd (fs/file.c:597) 
[ 15.618454][ C2] ? __lock_release (kernel/locking/lockdep.c:5539) 
[ 15.618458][ 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) 
[ 15.618461][ C2] ? _raw_spin_unlock (./arch/x86/include/asm/preempt.h:104 ./include/linux/spinlock_api_smp.h:143 kernel/locking/spinlock.c:186) 
[ 15.618465][ C2] ? alloc_fd (fs/file.c:597) 
[ 15.618469][ C2] do_sys_openat2 (fs/open.c:1437) 
[ 15.618473][ C2] ? __pfx_do_sys_openat2 (fs/open.c:1422) 
[ 15.618477][ C2] ? find_held_lock (kernel/locking/lockdep.c:5353) 
[ 15.618482][ C2] __x64_sys_openat (fs/open.c:1463) 
[ 15.618485][ 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) 
[ 15.618489][ C2] ? __pfx___x64_sys_openat (fs/open.c:1463) 
[ 15.618494][ C2] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:745) 
[ 15.618496][ C2] ? do_syscall_64 (./arch/x86/include/asm/irqflags.h:42 ./arch/x86/include/asm/irqflags.h:119 ./include/linux/entry-common.h:199 arch/x86/entry/syscall_64.c:90) 
[ 15.618500][ C2] do_syscall_64 (arch/x86/entry/syscall_64.c:63 arch/x86/entry/syscall_64.c:94) 
[ 15.618503][ C2] entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:130) 
[   15.618505][    C2] RIP: 0033:0x7f8f54a1182b
[ 15.618508][ C2] Code: 25 00 00 41 00 3d 00 00 41 00 74 4b 64 8b 04 25 18 00 00 00 85 c0 75 67 44 89 e2 48 89 ee bf 9c ff ff ff b8 01 01 00 00 0f 05 <48> 3d 00 f0 ff ff 0f 87 91 00 00 00 48 8b 54 24 28 64 48 2b 14 25
All code
========
   0:	25 00 00 41 00       	and    $0x410000,%eax
   5:	3d 00 00 41 00       	cmp    $0x410000,%eax
   a:	74 4b                	je     0x57
   c:	64 8b 04 25 18 00 00 	mov    %fs:0x18,%eax
  13:	00 
  14:	85 c0                	test   %eax,%eax
  16:	75 67                	jne    0x7f
  18:	44 89 e2             	mov    %r12d,%edx
  1b:	48 89 ee             	mov    %rbp,%rsi
  1e:	bf 9c ff ff ff       	mov    $0xffffff9c,%edi
  23:	b8 01 01 00 00       	mov    $0x101,%eax
  28:	0f 05                	syscall
  2a:*	48 3d 00 f0 ff ff    	cmp    $0xfffffffffffff000,%rax		<-- trapping instruction
  30:	0f 87 91 00 00 00    	ja     0xc7
  36:	48 8b 54 24 28       	mov    0x28(%rsp),%rdx
  3b:	64                   	fs
  3c:	48                   	rex.W
  3d:	2b                   	.byte 0x2b
  3e:	14 25                	adc    $0x25,%al

Code starting with the faulting instruction
===========================================
   0:	48 3d 00 f0 ff ff    	cmp    $0xfffffffffffff000,%rax
   6:	0f 87 91 00 00 00    	ja     0x9d
   c:	48 8b 54 24 28       	mov    0x28(%rsp),%rdx
  11:	64                   	fs
  12:	48                   	rex.W
  13:	2b                   	.byte 0x2b
  14:	14 25                	adc    $0x25,%al
[   15.618510][    C2] RSP: 002b:00007ffc0ef6ffc0 EFLAGS: 00000246 ORIG_RAX: 0000000000000101
[   15.618513][    C2] RAX: ffffffffffffffda RBX: 0000556f150ce380 RCX: 00007f8f54a1182b
[   15.618515][    C2] RDX: 0000000000000241 RSI: 0000556f150d6a40 RDI: 00000000ffffff9c
[   15.618516][    C2] RBP: 0000556f150d6a40 R08: 0000000000000000 R09: 0000000000000020
[   15.618518][    C2] R10: 00000000000001b6 R11: 0000000000000246 R12: 0000000000000241
[   15.618520][    C2] R13: 0000000000000001 R14: 0000556f150d6a40 R15: 00007f8f548d06c0
| [   17.967080][    C2] INFO: lockdep is turned off.
| [   17.967310][    C2] Preemption disabled at:
| [ 17.967311][ C2] handle_softirqs (kernel/softirq.c:553) 
| [   17.967793][    C2] Tainted: [W]=WARN
[   17.967794][    C2] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[   17.967796][    C2] Call Trace:
[   17.967798][    C2]  <IRQ>
[ 17.967799][ C2] dump_stack_lvl (lib/dump_stack.c:123) 
[ 17.967807][ C2] __might_resched (kernel/sched/core.c:8796) 
[ 17.967814][ C2] down_write (./include/linux/kernel.h:73 kernel/locking/rwsem.c:1576) 
[ 17.967818][ C2] ? __pfx_down_write (kernel/locking/rwsem.c:1575) 
[ 17.967821][ C2] ? simple_recursive_removal (fs/libfs.c:614) 
[ 17.967825][ C2] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:745) 
[ 17.967830][ 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) 
[ 17.967836][ C2] simple_recursive_removal (./include/linux/dcache.h:409 ./include/linux/dcache.h:424 ./include/linux/dcache.h:434 fs/libfs.c:617) 
[ 17.967839][ 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) 
[ 17.967842][ C2] ? __pfx_remove_one (fs/debugfs/inode.c:780) 
[ 17.967848][ C2] debugfs_remove (fs/debugfs/inode.c:806 fs/debugfs/inode.c:799) 
[ 17.967851][ C2] ref_tracker_dir_exit (lib/ref_tracker.c:411 lib/ref_tracker.c:195) 
[ 17.967857][ C2] ? __pfx_ref_tracker_free (lib/ref_tracker.c:253) 
[ 17.967860][ 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) 
[ 17.967866][ C2] ? rcu_do_batch (kernel/rcu/tree.c:2576) 
[ 17.967869][ C2] ? __pfx_ref_tracker_dir_exit (lib/ref_tracker.c:189) 
[ 17.967873][ C2] ? irq_exit_rcu (kernel/softirq.c:698) 
[ 17.967875][ C2] ? sysvec_apic_timer_interrupt (arch/x86/kernel/apic/apic.c:1050 arch/x86/kernel/apic/apic.c:1050) 
[ 17.967880][ C2] ? asm_sysvec_apic_timer_interrupt (./arch/x86/include/asm/idtentry.h:702) 
[ 17.967884][ C2] ? is_module_text_address (kernel/module/main.c:3743) 
[ 17.967888][ C2] ? kernel_text_address (kernel/extable.c:119 kernel/extable.c:94) 
[ 17.967891][ C2] ? __kernel_text_address (kernel/extable.c:79) 
[ 17.967894][ C2] ? unwind_get_return_address (arch/x86/kernel/unwind_orc.c:369 arch/x86/kernel/unwind_orc.c:364) 
[ 17.967898][ C2] ? arch_stack_walk (arch/x86/kernel/stacktrace.c:26) 
[ 17.967903][ C2] ? stack_trace_save (kernel/stacktrace.c:123) 
[ 17.967905][ C2] ? kasan_save_stack (mm/kasan/common.c:48) 
[ 17.967910][ C2] ? kasan_save_track (./arch/x86/include/asm/current.h:25 mm/kasan/common.c:60 mm/kasan/common.c:69) 
[ 17.967912][ C2] ? bpf_sk_storage_free (./include/linux/rcupdate.h:341 ./include/linux/rcupdate.h:871 net/core/bpf_sk_storage.c:61) 
[ 17.967917][ C2] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:745) 
[ 17.967921][ C2] __put_net (net/core/net_namespace.c:732) 
[ 17.967925][ C2] __sk_destruct (./include/net/net_namespace.h:288 ./include/net/net_namespace.h:390 net/core/sock.c:2376) 
[ 17.967929][ C2] ? rcu_do_batch (kernel/rcu/tree.c:2576) 
[ 17.967931][ C2] rcu_do_batch (kernel/rcu/tree.c:2576) 
[ 17.967936][ C2] ? __pfx_rcu_do_batch (kernel/rcu/tree.c:2500) 
[ 17.967939][ C2] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:745) 
[ 17.967942][ C2] ? trace_irq_enable.constprop.0 (./include/trace/events/preemptirq.h:40) 
[ 17.967950][ C2] rcu_core (kernel/rcu/tree.c:2834) 
[ 17.967954][ C2] handle_softirqs (kernel/softirq.c:579) 
[ 17.967960][ C2] __irq_exit_rcu (kernel/softirq.c:614 kernel/softirq.c:453 kernel/softirq.c:680) 
[ 17.967963][ C2] irq_exit_rcu (kernel/softirq.c:698) 
[ 17.967966][ C2] sysvec_apic_timer_interrupt (arch/x86/kernel/apic/apic.c:1050 arch/x86/kernel/apic/apic.c:1050) 
[   17.967970][    C2]  </IRQ>
[   17.967971][    C2]  <TASK>
[ 17.967972][ C2] asm_sysvec_apic_timer_interrupt (./arch/x86/include/asm/idtentry.h:702) 
[ 17.967975][ C2] RIP: 0010:is_module_text_address (kernel/module/main.c:3743) 
[ 17.967979][ C2] Code: f2 ff e9 4c ff ff ff 90 0f 0b 90 66 0f 1f 44 00 00 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 66 0f 1f 00 0f 1f 44 00 00 <41> 54 55 48 89 fd e8 8c e3 fa ff 31 d2 45 31 c9 45 31 c0 48 8d 05
All code
========
   0:	f2 ff                	repnz ljmp (bad)
   2:	e9 4c ff ff ff       	jmp    0xffffffffffffff53
   7:	90                   	nop
   8:	0f 0b                	ud2
   a:	90                   	nop
   b:	66 0f 1f 44 00 00    	nopw   0x0(%rax,%rax,1)
  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:	90                   	nop
  1c:	90                   	nop
  1d:	90                   	nop
  1e:	90                   	nop
  1f:	90                   	nop
  20:	90                   	nop
  21:	66 0f 1f 00          	nopw   (%rax)
  25:	0f 1f 44 00 00       	nopl   0x0(%rax,%rax,1)
  2a:*	41 54                	push   %r12		<-- trapping instruction
  2c:	55                   	push   %rbp
  2d:	48 89 fd             	mov    %rdi,%rbp
  30:	e8 8c e3 fa ff       	call   0xfffffffffffae3c1
  35:	31 d2                	xor    %edx,%edx
  37:	45 31 c9             	xor    %r9d,%r9d
  3a:	45 31 c0             	xor    %r8d,%r8d
  3d:	48                   	rex.W
  3e:	8d                   	.byte 0x8d
  3f:	05                   	.byte 0x5

Code starting with the faulting instruction
===========================================
   0:	41 54                	push   %r12
   2:	55                   	push   %rbp
   3:	48 89 fd             	mov    %rdi,%rbp
   6:	e8 8c e3 fa ff       	call   0xfffffffffffae397
   b:	31 d2                	xor    %edx,%edx
   d:	45 31 c9             	xor    %r9d,%r9d
  10:	45 31 c0             	xor    %r8d,%r8d
  13:	48                   	rex.W
  14:	8d                   	.byte 0x8d
  15:	05                   	.byte 0x5
[   17.967982][    C2] RSP: 0018:ffffc90000aa76b8 EFLAGS: 00000246
[   17.967985][    C2] RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000000
[   17.967987][    C2] RDX: 0000000000000000 RSI: ffffffff97453b60 RDI: 00007fe700098abd
[   17.967989][    C2] RBP: 00007fe700098abd R08: 0000000000000000 R09: ffffc90000aa7749
[   17.967991][    C2] R10: ffffffff94812687 R11: ffffc90000aa7748 R12: ffffc90000aa77d0
[   17.967993][    C2] R13: 0000000000000000 R14: ffff8880050145c0 R15: ffff888001942040
[ 17.967996][ 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) 
[ 17.968002][ C2] kernel_text_address (kernel/extable.c:119 kernel/extable.c:94) 
[ 17.968005][ C2] __kernel_text_address (kernel/extable.c:79) 
[ 17.968007][ C2] unwind_get_return_address (arch/x86/kernel/unwind_orc.c:369 arch/x86/kernel/unwind_orc.c:364) 
[ 17.968010][ C2] ? __pfx_stack_trace_consume_entry (kernel/stacktrace.c:83) 
[ 17.968013][ C2] arch_stack_walk (arch/x86/kernel/stacktrace.c:26) 
[ 17.968020][ C2] stack_trace_save (kernel/stacktrace.c:123) 
[ 17.968022][ C2] ? __pfx_stack_trace_save (kernel/stacktrace.c:114) 
[ 17.968026][ C2] ? kasan_save_stack (mm/kasan/common.c:49) 
[ 17.968029][ C2] ? kasan_save_stack (mm/kasan/common.c:48) 
[ 17.968032][ C2] kasan_save_stack (mm/kasan/common.c:48) 
[ 17.968035][ C2] ? kasan_save_stack (mm/kasan/common.c:48) 
[ 17.968038][ C2] ? kasan_save_track (./arch/x86/include/asm/current.h:25 mm/kasan/common.c:60 mm/kasan/common.c:69) 
[ 17.968040][ C2] ? kasan_save_free_info (mm/kasan/generic.c:579) 
[ 17.968044][ C2] ? __kasan_slab_free (mm/kasan/common.c:271) 
[ 17.968046][ C2] ? kmem_cache_free (mm/slub.c:4642 mm/slub.c:4744) 
[ 17.968051][ C2] ? unlink_anon_vmas (mm/rmap.c:439) 
[ 17.968054][ C2] ? free_pgtables (mm/memory.c:392) 
[ 17.968058][ C2] ? exit_mmap (mm/mmap.c:1297) 
[ 17.968062][ C2] ? mmput (kernel/fork.c:1449 kernel/fork.c:1383 kernel/fork.c:1404) 
[ 17.968065][ C2] ? exit_mm (kernel/exit.c:596) 
[ 17.968069][ C2] ? do_exit (kernel/exit.c:950) 
[ 17.968072][ C2] ? do_group_exit (kernel/exit.c:1089) 
[ 17.968075][ C2] ? __x64_sys_exit_group (kernel/exit.c:1117) 
[ 17.968079][ C2] ? x64_sys_call (arch/x86/entry/syscall_64.c:37) 
[ 17.968084][ C2] ? do_syscall_64 (arch/x86/entry/syscall_64.c:63 arch/x86/entry/syscall_64.c:94) 
[ 17.968086][ C2] ? entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:130) 
[ 17.968089][ C2] ? __pfx_do_raw_spin_lock (kernel/locking/spinlock_debug.c:114) 
[ 17.968092][ C2] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:745) 
[ 17.968096][ C2] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:745) 
[ 17.968099][ C2] ? trace_irq_enable.constprop.0 (./include/trace/events/preemptirq.h:40) 
[ 17.968103][ C2] ? _raw_spin_unlock_irqrestore (./arch/x86/include/asm/preempt.h:104 ./include/linux/spinlock_api_smp.h:152 kernel/locking/spinlock.c:194) 
[ 17.968108][ C2] ? __debug_check_no_obj_freed (lib/debugobjects.c:1110) 
[ 17.968114][ C2] ? __pfx___debug_check_no_obj_freed (lib/debugobjects.c:1070) 
[ 17.968117][ C2] ? trace_rcu_segcb_stats (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:745 ./include/trace/events/rcu.h:537) 
[ 17.968122][ C2] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:745) 
[ 17.968125][ C2] ? trace_irq_enable.constprop.0 (./include/trace/events/preemptirq.h:40) 
[ 17.968129][ C2] kasan_save_track (./arch/x86/include/asm/current.h:25 mm/kasan/common.c:60 mm/kasan/common.c:69) 
[ 17.968132][ C2] kasan_save_free_info (mm/kasan/generic.c:579) 
[ 17.968135][ C2] __kasan_slab_free (mm/kasan/common.c:271) 
[ 17.968138][ C2] kmem_cache_free (mm/slub.c:4642 mm/slub.c:4744) 
[ 17.968142][ C2] ? unlink_anon_vmas (mm/rmap.c:439) 
[ 17.968145][ C2] unlink_anon_vmas (mm/rmap.c:439) 
[ 17.968148][ C2] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:745) 
[ 17.968152][ C2] free_pgtables (mm/memory.c:392) 
[ 17.968158][ C2] ? __pfx_free_pgtables (mm/memory.c:349) 
[ 17.968160][ C2] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5834) 
[ 17.968163][ C2] ? exit_mmap (./include/linux/seqlock.h:431 ./include/linux/mmap_lock.h:83 ./include/linux/mmap_lock.h:130 mm/mmap.c:1292) 
[ 17.968168][ 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) 
[ 17.968171][ C2] ? __pfx_down_write (kernel/locking/rwsem.c:1575) 
[ 17.968174][ C2] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:745) 
[ 17.968176][ C2] ? trace_lock_release (./include/trace/events/lock.h:69 (discriminator 21)) 
[ 17.968182][ C2] exit_mmap (mm/mmap.c:1297) 
[ 17.968186][ C2] ? __pfx_exit_mmap (mm/mmap.c:1259) 
[ 17.968190][ C2] ? __mutex_lock (./arch/x86/include/asm/preempt.h:104 kernel/locking/mutex.c:727 kernel/locking/mutex.c:746) 
[ 17.968194][ C2] ? lock_release (kernel/locking/lockdep.c:118 kernel/locking/lockdep.c:5884) 
[ 17.968197][ 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) 
[ 17.968205][ C2] mmput (kernel/fork.c:1449 kernel/fork.c:1383 kernel/fork.c:1404) 
[ 17.968209][ C2] exit_mm (kernel/exit.c:596) 
[ 17.968212][ C2] do_exit (kernel/exit.c:950) 
[ 17.968217][ C2] do_group_exit (kernel/exit.c:1089) 
[ 17.968221][ C2] __x64_sys_exit_group (kernel/exit.c:1117) 
[ 17.968224][ C2] x64_sys_call (arch/x86/entry/syscall_64.c:37) 
[ 17.968228][ C2] do_syscall_64 (arch/x86/entry/syscall_64.c:63 arch/x86/entry/syscall_64.c:94) 
[ 17.968231][ C2] entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:130) 
[   17.968234][    C2] RIP: 0033:0x7fe700098abd
[ 17.968237][ C2] Code: Unable to access opcode bytes at 0x7fe700098a93.

Code starting with the faulting instruction
===========================================
[   17.968238][    C2] RSP: 002b:00007ffddd660238 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7
[   17.968241][    C2] RAX: ffffffffffffffda RBX: 00007fe7001759c0 RCX: 00007fe700098abd
[   17.968243][    C2] RDX: 00000000000000e7 RSI: ffffffffffffff80 RDI: 0000000000000000
[   17.968244][    C2] RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000030
[   17.968246][    C2] R10: 00007ffddd6600c0 R11: 0000000000000246 R12: 00007fe7001759c0


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