======================================
| [   17.486765][    C3] 1 lock held by swapper/3/0:
| [ 17.486954][ C3] #0: ffffffff8b5774c0 (rcu_callback){....}-{0:0}, at: rcu_do_batch (./include/linux/rcupdate.h:331 kernel/rcu/tree.c:2570) 
| [   17.487292][    C3]
| [   17.487292][    C3] stack backtrace:
[   17.487590][    C3] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[   17.487593][    C3] Call Trace:
[   17.487596][    C3]  <IRQ>
[ 17.487599][ C3] dump_stack_lvl (lib/dump_stack.c:123) 
[ 17.487605][ C3] print_usage_bug.part.0 (kernel/locking/lockdep.c:4048) 
[ 17.487610][ C3] mark_lock_irq (kernel/locking/lockdep.c:4013 kernel/locking/lockdep.c:4059 kernel/locking/lockdep.c:4270) 
[ 17.487615][ C3] ? __pfx_unwind_next_frame (arch/x86/kernel/unwind_orc.c:469) 
[ 17.487620][ C3] ? save_trace (kernel/locking/lockdep.c:595) 
[ 17.487625][ C3] mark_lock (kernel/locking/lockdep.c:4756) 
[ 17.487629][ C3] mark_usage (kernel/locking/lockdep.c:4645) 
[ 17.487632][ C3] __lock_acquire (kernel/locking/lockdep.c:5194) 
[ 17.487635][ C3] ? __lock_acquire (kernel/locking/lockdep.c:5240) 
[ 17.487639][ C3] lock_acquire.part.0 (kernel/locking/lockdep.c:473 kernel/locking/lockdep.c:5873) 
[ 17.487642][ C3] ? simple_pin_fs (fs/libfs.c:1067) 
[ 17.487647][ C3] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:745) 
[ 17.487652][ C3] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5834) 
[ 17.487654][ C3] ? simple_pin_fs (fs/libfs.c:1067) 
[ 17.487659][ C3] _raw_spin_lock (./include/linux/spinlock_api_smp.h:134 kernel/locking/spinlock.c:154) 
[ 17.487664][ C3] ? simple_pin_fs (fs/libfs.c:1067) 
[ 17.487667][ C3] simple_pin_fs (fs/libfs.c:1067) 
[ 17.487671][ C3] debugfs_remove (fs/debugfs/inode.c:805 fs/debugfs/inode.c:799) 
[ 17.487674][ C3] ref_tracker_dir_exit (lib/ref_tracker.c:411 lib/ref_tracker.c:195) 
[ 17.487681][ C3] ? __pfx_ref_tracker_free (lib/ref_tracker.c:253) 
[ 17.487684][ 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) 
[ 17.487690][ C3] ? rcu_do_batch (kernel/rcu/tree.c:2576) 
[ 17.487693][ C3] ? __pfx_ref_tracker_dir_exit (lib/ref_tracker.c:189) 
[ 17.487696][ C3] ? irq_exit_rcu (kernel/softirq.c:698) 
[ 17.487700][ C3] ? sysvec_apic_timer_interrupt (arch/x86/kernel/apic/apic.c:1050 arch/x86/kernel/apic/apic.c:1050) 
[ 17.487705][ C3] ? asm_sysvec_apic_timer_interrupt (./arch/x86/include/asm/idtentry.h:702) 
[ 17.487709][ C3] ? pv_native_safe_halt (arch/x86/kernel/paravirt.c:82) 
[ 17.487712][ C3] ? default_idle (./arch/x86/include/asm/paravirt.h:107 arch/x86/kernel/process.c:743) 
[ 17.487715][ C3] ? default_idle_call (./include/linux/cpuidle.h:143 kernel/sched/idle.c:118) 
[ 17.487718][ C3] ? cpuidle_idle_call (kernel/sched/idle.c:186) 
[ 17.487721][ C3] ? do_idle (kernel/sched/idle.c:325) 
[ 17.487723][ C3] ? cpu_startup_entry (kernel/sched/idle.c:422 (discriminator 1)) 
[ 17.487726][ C3] ? start_secondary (arch/x86/kernel/smpboot.c:203 arch/x86/kernel/smpboot.c:283) 
[ 17.487729][ C3] ? common_startup_64 (arch/x86/kernel/head_64.S:419) 
[ 17.487736][ C3] __put_net (net/core/net_namespace.c:732) 
[ 17.487740][ C3] __sk_destruct (./include/net/net_namespace.h:288 ./include/net/net_namespace.h:390 net/core/sock.c:2376) 
[ 17.487744][ C3] ? rcu_do_batch (kernel/rcu/tree.c:2576) 
[ 17.487746][ C3] rcu_do_batch (kernel/rcu/tree.c:2576) 
[ 17.487751][ C3] ? __pfx_rcu_do_batch (kernel/rcu/tree.c:2500) 
[ 17.487754][ C3] ? __lock_release (kernel/locking/lockdep.c:5539) 
[ 17.487758][ C3] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:745) 
[ 17.487760][ C3] ? _raw_spin_unlock_irqrestore (./include/linux/spinlock_api_smp.h:151 kernel/locking/spinlock.c:194) 
[ 17.487765][ C3] rcu_core (kernel/rcu/tree.c:2834) 
[ 17.487770][ C3] handle_softirqs (kernel/softirq.c:579) 
[ 17.487775][ C3] __irq_exit_rcu (kernel/softirq.c:614 kernel/softirq.c:453 kernel/softirq.c:680) 
[ 17.487778][ C3] irq_exit_rcu (kernel/softirq.c:698) 
[ 17.487781][ C3] sysvec_apic_timer_interrupt (arch/x86/kernel/apic/apic.c:1050 arch/x86/kernel/apic/apic.c:1050) 
[   17.487785][    C3]  </IRQ>
[   17.487786][    C3]  <TASK>
[ 17.487787][ C3] asm_sysvec_apic_timer_interrupt (./arch/x86/include/asm/idtentry.h:702) 
[ 17.487790][ C3] RIP: 0010:pv_native_safe_halt (arch/x86/kernel/paravirt.c:82) 
[ 17.487794][ C3] 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
[   17.487797][    C3] RSP: 0018:ffffc90000157de8 EFLAGS: 00000246
[   17.487800][    C3] RAX: 000000000003de41 RBX: 1ffff9200002afc1 RCX: ffffffff8a58f5d9
[   17.487802][    C3] RDX: 0000000000000000 RSI: ffffffff8b08f4e4 RDI: ffffffff8a853be0
[   17.487804][    C3] RBP: 0000000000000000 R08: 0000000000000001 R09: ffffed1006c366fa
[   17.487806][    C3] R10: ffff8880361b37d3 R11: ffffffff8b211288 R12: 0000000000000000
[   17.487807][    C3] R13: ffff888001bf45c0 R14: dffffc0000000000 R15: 0000000000000000
[ 17.487811][ C3] ? ct_kernel_exit.constprop.0 (kernel/context_tracking.c:146) 
[ 17.487816][ C3] default_idle (./arch/x86/include/asm/paravirt.h:107 arch/x86/kernel/process.c:743) 
[ 17.487819][ C3] default_idle_call (./include/linux/cpuidle.h:143 kernel/sched/idle.c:118) 
[ 17.487821][ C3] cpuidle_idle_call (kernel/sched/idle.c:186) 
[ 17.487824][ C3] ? __pfx_cpuidle_idle_call (kernel/sched/idle.c:168) 
[ 17.487828][ C3] ? tsc_verify_tsc_adjust (arch/x86/kernel/tsc_sync.c:60) 
[ 17.487832][ C3] do_idle (kernel/sched/idle.c:325) 
[ 17.487836][ C3] cpu_startup_entry (kernel/sched/idle.c:422 (discriminator 1)) 
[ 17.487838][ C3] start_secondary (arch/x86/kernel/smpboot.c:203 arch/x86/kernel/smpboot.c:283) 
[ 17.487842][ C3] ? __pfx_start_secondary (arch/x86/kernel/smpboot.c:233) 
[ 17.487846][ C3] common_startup_64 (arch/x86/kernel/head_64.S:419) 
| [   17.506491][    C3] RCU nest depth: 0, expected: 0
| [   17.506790][    C3] INFO: lockdep is turned off.
| [   17.507076][    C3] Preemption disabled at:
| [ 17.507079][ C3] 0x0 
[   17.507595][    C3] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[   17.507598][    C3] Call Trace:
[   17.507601][    C3]  <IRQ>
[ 17.507604][ C3] dump_stack_lvl (lib/dump_stack.c:123) 
[ 17.507615][ C3] __might_resched (kernel/sched/core.c:8796) 
[ 17.507625][ C3] down_write (./include/linux/kernel.h:73 kernel/locking/rwsem.c:1576) 
[ 17.507632][ C3] ? __pfx_down_write (kernel/locking/rwsem.c:1575) 
[ 17.507636][ C3] ? simple_recursive_removal (fs/libfs.c:614) 
[ 17.507641][ C3] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:745) 
[ 17.507648][ 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) 
[ 17.507656][ C3] simple_recursive_removal (./include/linux/dcache.h:409 ./include/linux/dcache.h:424 ./include/linux/dcache.h:434 fs/libfs.c:617) 
[ 17.507661][ 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) 
[ 17.507665][ C3] ? __pfx_remove_one (fs/debugfs/inode.c:780) 
[ 17.507673][ C3] debugfs_remove (fs/debugfs/inode.c:806 fs/debugfs/inode.c:799) 
[ 17.507679][ C3] ref_tracker_dir_exit (lib/ref_tracker.c:411 lib/ref_tracker.c:195) 
[ 17.507685][ C3] ? __pfx_ref_tracker_free (lib/ref_tracker.c:253) 
[ 17.507691][ 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) 
[ 17.507698][ C3] ? rcu_do_batch (kernel/rcu/tree.c:2576) 
[ 17.507703][ C3] ? __pfx_ref_tracker_dir_exit (lib/ref_tracker.c:189) 
[ 17.507708][ C3] ? irq_exit_rcu (kernel/softirq.c:698) 
[ 17.507715][ C3] ? sysvec_apic_timer_interrupt (arch/x86/kernel/apic/apic.c:1050 arch/x86/kernel/apic/apic.c:1050) 
[ 17.507722][ C3] ? asm_sysvec_apic_timer_interrupt (./arch/x86/include/asm/idtentry.h:702) 
[ 17.507728][ C3] ? pv_native_safe_halt (arch/x86/kernel/paravirt.c:82) 
[ 17.507733][ C3] ? default_idle (./arch/x86/include/asm/paravirt.h:107 arch/x86/kernel/process.c:743) 
[ 17.507738][ C3] ? default_idle_call (./include/linux/cpuidle.h:143 kernel/sched/idle.c:118) 
[ 17.507742][ C3] ? cpuidle_idle_call (kernel/sched/idle.c:186) 
[ 17.507747][ C3] ? do_idle (kernel/sched/idle.c:325) 
[ 17.507751][ C3] ? cpu_startup_entry (kernel/sched/idle.c:422 (discriminator 1)) 
[ 17.507756][ C3] ? start_secondary (arch/x86/kernel/smpboot.c:203 arch/x86/kernel/smpboot.c:283) 
[ 17.507761][ C3] ? common_startup_64 (arch/x86/kernel/head_64.S:419) 
[ 17.507773][ C3] __put_net (net/core/net_namespace.c:732) 
[ 17.507778][ C3] __sk_destruct (./include/net/net_namespace.h:288 ./include/net/net_namespace.h:390 net/core/sock.c:2376) 
[ 17.507785][ C3] ? rcu_do_batch (kernel/rcu/tree.c:2576) 
[ 17.507790][ C3] rcu_do_batch (kernel/rcu/tree.c:2576) 
[ 17.507799][ C3] ? __pfx_rcu_do_batch (kernel/rcu/tree.c:2500) 
[ 17.507805][ C3] ? __lock_release (kernel/locking/lockdep.c:5539) 
[ 17.507811][ C3] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:745) 
[ 17.507816][ C3] ? _raw_spin_unlock_irqrestore (./include/linux/spinlock_api_smp.h:151 kernel/locking/spinlock.c:194) 
[ 17.507825][ C3] rcu_core (kernel/rcu/tree.c:2834) 
[ 17.507832][ C3] handle_softirqs (kernel/softirq.c:579) 
[ 17.507842][ C3] __irq_exit_rcu (kernel/softirq.c:614 kernel/softirq.c:453 kernel/softirq.c:680) 
[ 17.507848][ C3] irq_exit_rcu (kernel/softirq.c:698) 
[ 17.507852][ C3] sysvec_apic_timer_interrupt (arch/x86/kernel/apic/apic.c:1050 arch/x86/kernel/apic/apic.c:1050) 
[   17.507858][    C3]  </IRQ>
[   17.507860][    C3]  <TASK>
[ 17.507863][ C3] asm_sysvec_apic_timer_interrupt (./arch/x86/include/asm/idtentry.h:702) 
[ 17.507867][ C3] RIP: 0010:pv_native_safe_halt (arch/x86/kernel/paravirt.c:82) 
[ 17.507872][ C3] 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
[   17.507875][    C3] RSP: 0018:ffffc90000157de8 EFLAGS: 00000246
[   17.507878][    C3] RAX: 000000000003de41 RBX: 1ffff9200002afc1 RCX: ffffffff8a58f5d9
[   17.507880][    C3] RDX: 0000000000000000 RSI: ffffffff8b08f4e4 RDI: ffffffff8a853be0
[   17.507882][    C3] RBP: 0000000000000000 R08: 0000000000000001 R09: ffffed1006c366fa
[   17.507884][    C3] R10: ffff8880361b37d3 R11: ffffffff8b211288 R12: 0000000000000000
[   17.507886][    C3] R13: ffff888001bf45c0 R14: dffffc0000000000 R15: 0000000000000000
[ 17.507889][ C3] ? ct_kernel_exit.constprop.0 (kernel/context_tracking.c:146) 
[ 17.507894][ C3] default_idle (./arch/x86/include/asm/paravirt.h:107 arch/x86/kernel/process.c:743) 
[ 17.507897][ C3] default_idle_call (./include/linux/cpuidle.h:143 kernel/sched/idle.c:118) 
[ 17.507899][ C3] cpuidle_idle_call (kernel/sched/idle.c:186) 
[ 17.507902][ C3] ? __pfx_cpuidle_idle_call (kernel/sched/idle.c:168) 
[ 17.507906][ C3] ? tsc_verify_tsc_adjust (arch/x86/kernel/tsc_sync.c:60) 
[ 17.507911][ C3] do_idle (kernel/sched/idle.c:325) 
[ 17.507914][ C3] cpu_startup_entry (kernel/sched/idle.c:422 (discriminator 1)) 
[ 17.507917][ C3] start_secondary (arch/x86/kernel/smpboot.c:203 arch/x86/kernel/smpboot.c:283) 
[ 17.507920][ C3] ? __pfx_start_secondary (arch/x86/kernel/smpboot.c:233) 
[ 17.507924][ C3] common_startup_64 (arch/x86/kernel/head_64.S:419) 
| [   20.094339][    C1] INFO: lockdep is turned off.
| [   20.094526][    C1] Preemption disabled at:
| [ 20.094528][ C1] handle_softirqs (kernel/softirq.c:553) 
| [   20.094942][    C1] Tainted: [W]=WARN
[   20.094943][    C1] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[   20.094945][    C1] Call Trace:
[   20.094947][    C1]  <IRQ>
[ 20.094949][ C1] dump_stack_lvl (lib/dump_stack.c:123) 
[ 20.094958][ C1] __might_resched (kernel/sched/core.c:8796) 
[ 20.094967][ C1] down_write (./include/linux/kernel.h:73 kernel/locking/rwsem.c:1576) 
[ 20.094973][ C1] ? __pfx_down_write (kernel/locking/rwsem.c:1575) 
[ 20.094977][ C1] ? simple_recursive_removal (fs/libfs.c:614) 
[ 20.094983][ C1] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:745) 
[ 20.094990][ C1] ? do_raw_spin_unlock (./arch/x86/include/asm/atomic.h:23 ./include/linux/atomic/atomic-arch-fallback.h:457 ./include/linux/atomic/atomic-instrumented.h:33 ./include/asm-generic/qspinlock.h:57 kernel/locking/spinlock_debug.c:101 kernel/locking/spinlock_debug.c:141) 
[ 20.094997][ C1] simple_recursive_removal (./include/linux/dcache.h:409 ./include/linux/dcache.h:424 ./include/linux/dcache.h:434 fs/libfs.c:617) 
[ 20.095001][ C1] ? do_raw_spin_unlock (./arch/x86/include/asm/atomic.h:23 ./include/linux/atomic/atomic-arch-fallback.h:457 ./include/linux/atomic/atomic-instrumented.h:33 ./include/asm-generic/qspinlock.h:57 kernel/locking/spinlock_debug.c:101 kernel/locking/spinlock_debug.c:141) 
[ 20.095006][ C1] ? __pfx_remove_one (fs/debugfs/inode.c:780) 
[ 20.095015][ C1] debugfs_remove (fs/debugfs/inode.c:806 fs/debugfs/inode.c:799) 
[ 20.095020][ C1] ref_tracker_dir_exit (lib/ref_tracker.c:411 lib/ref_tracker.c:195) 
[ 20.095027][ C1] ? __pfx_ref_tracker_free (lib/ref_tracker.c:253) 
[ 20.095033][ C1] ? __sk_destruct (./include/linux/instrumented.h:96 ./include/linux/atomic/atomic-instrumented.h:400 ./include/linux/refcount.h:389 ./include/linux/refcount.h:432 ./include/linux/refcount.h:450 ./include/net/net_namespace.h:287 ./include/net/net_namespace.h:390 net/core/sock.c:2376) 
[ 20.095040][ C1] ? rcu_do_batch (kernel/rcu/tree.c:2576) 
[ 20.095045][ C1] ? __pfx_ref_tracker_dir_exit (lib/ref_tracker.c:189) 
[ 20.095049][ C1] ? irq_exit_rcu (kernel/softirq.c:698) 
[ 20.095054][ C1] ? sysvec_apic_timer_interrupt (arch/x86/kernel/apic/apic.c:1050 arch/x86/kernel/apic/apic.c:1050) 
[ 20.095060][ C1] ? asm_sysvec_apic_timer_interrupt (./arch/x86/include/asm/idtentry.h:702) 
[ 20.095065][ C1] ? kasan_quarantine_put (mm/kasan/quarantine.c:237) 
[ 20.095070][ C1] ? kmem_cache_free (mm/slub.c:4642 mm/slub.c:4744) 
[ 20.095076][ C1] ? unlink_anon_vmas (mm/rmap.c:439) 
[ 20.095081][ C1] ? free_pgtables (mm/memory.c:392) 
[ 20.095086][ C1] ? exit_mmap (mm/mmap.c:1297) 
[ 20.095091][ C1] ? mmput (kernel/fork.c:1449 kernel/fork.c:1383 kernel/fork.c:1404) 
[ 20.095095][ C1] ? exit_mm (kernel/exit.c:596) 
[ 20.095100][ C1] ? do_exit (kernel/exit.c:950) 
[ 20.095104][ C1] ? bpf_sk_storage_free (./include/linux/rcupdate.h:341 ./include/linux/rcupdate.h:871 net/core/bpf_sk_storage.c:61) 
[ 20.095109][ C1] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:745) 
[ 20.095116][ C1] __put_net (net/core/net_namespace.c:732) 
[ 20.095121][ C1] __sk_destruct (./include/net/net_namespace.h:288 ./include/net/net_namespace.h:390 net/core/sock.c:2376) 
[ 20.095127][ C1] ? rcu_do_batch (kernel/rcu/tree.c:2576) 
[ 20.095131][ C1] rcu_do_batch (kernel/rcu/tree.c:2576) 
[ 20.095140][ C1] ? __pfx_rcu_do_batch (kernel/rcu/tree.c:2500) 
[ 20.095146][ C1] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:745) 
[ 20.095150][ C1] ? trace_irq_enable.constprop.0 (./include/trace/events/preemptirq.h:40) 
[ 20.095160][ C1] rcu_core (kernel/rcu/tree.c:2834) 
[ 20.095166][ C1] handle_softirqs (kernel/softirq.c:579) 
[ 20.095175][ C1] __irq_exit_rcu (kernel/softirq.c:614 kernel/softirq.c:453 kernel/softirq.c:680) 
[ 20.095180][ C1] irq_exit_rcu (kernel/softirq.c:698) 
[ 20.095184][ C1] sysvec_apic_timer_interrupt (arch/x86/kernel/apic/apic.c:1050 arch/x86/kernel/apic/apic.c:1050) 
[   20.095190][    C1]  </IRQ>
[   20.095192][    C1]  <TASK>
[ 20.095194][ C1] asm_sysvec_apic_timer_interrupt (./arch/x86/include/asm/idtentry.h:702) 
[ 20.095198][ C1] RIP: 0010:kasan_quarantine_put (mm/kasan/quarantine.c:237) 
[ 20.095203][ C1] Code: 10 48 81 fb 00 00 10 00 0f 87 84 00 00 00 4d 85 ed 75 78 9c 58 f6 c4 02 0f 85 2c 01 00 00 b8 01 00 00 00 4d 85 ed 74 01 fb 5b <5d> 41 5c 41 5d 41 5e e9 cd a6 09 02 e8 68 ad b2 ff 48 c7 c3 80 cf
All code
========
   0:	10 48 81             	adc    %cl,-0x7f(%rax)
   3:	fb                   	sti
   4:	00 00                	add    %al,(%rax)
   6:	10 00                	adc    %al,(%rax)
   8:	0f 87 84 00 00 00    	ja     0x92
   e:	4d 85 ed             	test   %r13,%r13
  11:	75 78                	jne    0x8b
  13:	9c                   	pushf
  14:	58                   	pop    %rax
  15:	f6 c4 02             	test   $0x2,%ah
  18:	0f 85 2c 01 00 00    	jne    0x14a
  1e:	b8 01 00 00 00       	mov    $0x1,%eax
  23:	4d 85 ed             	test   %r13,%r13
  26:	74 01                	je     0x29
  28:	fb                   	sti
  29:	5b                   	pop    %rbx
  2a:*	5d                   	pop    %rbp		<-- trapping instruction
  2b:	41 5c                	pop    %r12
  2d:	41 5d                	pop    %r13
  2f:	41 5e                	pop    %r14
  31:	e9 cd a6 09 02       	jmp    0x209a703
  36:	e8 68 ad b2 ff       	call   0xffffffffffb2ada3
  3b:	48                   	rex.W
  3c:	c7                   	.byte 0xc7
  3d:	c3                   	ret
  3e:	80                   	.byte 0x80
  3f:	cf                   	iret

Code starting with the faulting instruction
===========================================
   0:	5d                   	pop    %rbp
   1:	41 5c                	pop    %r12
   3:	41 5d                	pop    %r13
   5:	41 5e                	pop    %r14
   7:	e9 cd a6 09 02       	jmp    0x209a6d9
   c:	e8 68 ad b2 ff       	call   0xffffffffffb2ad79
  11:	48                   	rex.W
  12:	c7                   	.byte 0xc7
  13:	c3                   	ret
  14:	80                   	.byte 0x80
  15:	cf                   	iret
[   20.095208][    C1] RSP: 0018:ffffc90000737a68 EFLAGS: 00000206
[   20.095213][    C1] RAX: 0000000000000001 RBX: ffff888005d143c8 RCX: ffffffff88043b9f
[   20.095216][    C1] RDX: 0000000000000000 RSI: ffffffff8a853b60 RDI: ffffffff8851916d
[   20.095219][    C1] RBP: ffff888005d143c8 R08: 0000000000000000 R09: 0000000000000000
[   20.095222][    C1] R10: ffffffff8bfe68d7 R11: ffffc90000737748 R12: ffff888001942040
[   20.095225][    C1] R13: 0000000000000200 R14: 0000000000000000 R15: ffff888001942040
[ 20.095232][ C1] ? trace_irq_enable.constprop.0 (./arch/x86/include/asm/bitops.h:227 ./arch/x86/include/asm/bitops.h:239 ./include/asm-generic/bitops/instrumented-non-atomic.h:142 ./include/linux/cpumask.h:654 ./include/linux/cpumask.h:1210 ./include/trace/events/preemptirq.h:40) 
[ 20.095238][ C1] ? kasan_quarantine_put (mm/kasan/quarantine.c:234 (discriminator 1)) 
[ 20.095247][ C1] kmem_cache_free (mm/slub.c:4642 mm/slub.c:4744) 
[ 20.095252][ C1] ? unlink_anon_vmas (mm/rmap.c:439) 
[ 20.095259][ C1] unlink_anon_vmas (mm/rmap.c:439) 
[ 20.095264][ C1] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:745) 
[ 20.095271][ C1] free_pgtables (mm/memory.c:392) 
[ 20.095280][ C1] ? __pfx_free_pgtables (mm/memory.c:349) 
[ 20.095284][ C1] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5834) 
[ 20.095287][ C1] ? exit_mmap (./include/linux/seqlock.h:431 ./include/linux/mmap_lock.h:83 ./include/linux/mmap_lock.h:130 mm/mmap.c:1292) 
[ 20.095295][ C1] ? down_write (./arch/x86/include/asm/preempt.h:104 kernel/locking/rwsem.c:1307 kernel/locking/rwsem.c:1313 kernel/locking/rwsem.c:1578) 
[ 20.095299][ C1] ? __pfx_down_write (kernel/locking/rwsem.c:1575) 
[ 20.095304][ C1] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:745) 
[ 20.095309][ C1] ? trace_lock_release (./include/trace/events/lock.h:69 (discriminator 21)) 
[ 20.095317][ C1] exit_mmap (mm/mmap.c:1297) 
[ 20.095325][ C1] ? __pfx_exit_mmap (mm/mmap.c:1259) 
[ 20.095330][ C1] ? __mutex_lock (./arch/x86/include/asm/preempt.h:104 kernel/locking/mutex.c:727 kernel/locking/mutex.c:746) 
[ 20.095337][ C1] ? lock_release (kernel/locking/lockdep.c:118 kernel/locking/lockdep.c:5884) 
[ 20.095343][ C1] ? __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) 
[ 20.095358][ C1] mmput (kernel/fork.c:1449 kernel/fork.c:1383 kernel/fork.c:1404) 
[ 20.095364][ C1] exit_mm (kernel/exit.c:596) 
[ 20.095369][ C1] do_exit (kernel/exit.c:950) 
[ 20.095376][ C1] do_group_exit (kernel/exit.c:1089) 
[ 20.095383][ C1] __x64_sys_exit_group (kernel/exit.c:1117) 
[ 20.095389][ C1] x64_sys_call (arch/x86/entry/syscall_64.c:37) 
[ 20.095396][ C1] do_syscall_64 (arch/x86/entry/syscall_64.c:63 arch/x86/entry/syscall_64.c:94) 
[ 20.095403][ C1] entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:130) 
[   20.095407][    C1] RIP: 0033:0x7f9a33857abd
[ 20.095412][ C1] Code: Unable to access opcode bytes at 0x7f9a33857a93.

Code starting with the faulting instruction
===========================================
[   20.095414][    C1] RSP: 002b:00007fff5e5de738 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7
[   20.095419][    C1] RAX: ffffffffffffffda RBX: 00007f9a339349c0 RCX: 00007f9a33857abd
[   20.095422][    C1] RDX: 00000000000000e7 RSI: ffffffffffffff80 RDI: 0000000000000000
[   20.095425][    C1] RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000030
[   20.095427][    C1] R10: 00007fff5e5de5c0 R11: 0000000000000246 R12: 00007f9a339349c0


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