======================================
| [   15.004959][    C3] 1 lock held by swapper/3/0:
| [ 15.005167][ C3] #0: ffffffffa6d749c0 (rcu_callback){....}-{0:0}, at: rcu_do_batch (./include/linux/rcupdate.h:331 kernel/rcu/tree.c:2562) 
| [   15.005539][    C3]
| [   15.005539][    C3] stack backtrace:
[   15.005799][    C3] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[   15.005801][    C3] Call Trace:
[   15.005803][    C3]  <IRQ>
[ 15.005805][ C3] dump_stack_lvl (lib/dump_stack.c:123) 
[ 15.005811][ C3] print_usage_bug.part.0 (kernel/locking/lockdep.c:4046) 
[ 15.005816][ C3] mark_lock_irq (kernel/locking/lockdep.c:4011 kernel/locking/lockdep.c:4057 kernel/locking/lockdep.c:4268) 
[ 15.005821][ C3] ? __pfx_unwind_next_frame (arch/x86/kernel/unwind_orc.c:469) 
[ 15.005827][ C3] ? save_trace (kernel/locking/lockdep.c:594) 
[ 15.005832][ C3] mark_lock (kernel/locking/lockdep.c:4754) 
[ 15.005836][ C3] mark_usage (kernel/locking/lockdep.c:4643) 
[ 15.005840][ C3] __lock_acquire (kernel/locking/lockdep.c:5189) 
[ 15.005845][ C3] lock_acquire.part.0 (kernel/locking/lockdep.c:472 kernel/locking/lockdep.c:5868) 
[ 15.005848][ C3] ? simple_pin_fs (fs/libfs.c:1066) 
[ 15.005851][ C3] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:736) 
[ 15.005856][ C3] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5829) 
[ 15.005859][ C3] ? simple_pin_fs (fs/libfs.c:1066) 
[ 15.005862][ C3] _raw_spin_lock (./include/linux/spinlock_api_smp.h:134 kernel/locking/spinlock.c:154) 
[ 15.005865][ C3] ? simple_pin_fs (fs/libfs.c:1066) 
[ 15.005867][ C3] simple_pin_fs (fs/libfs.c:1066) 
[ 15.005870][ C3] debugfs_remove (fs/debugfs/inode.c:805 fs/debugfs/inode.c:799) 
[ 15.005873][ C3] ref_tracker_dir_exit (lib/ref_tracker.c:423 lib/ref_tracker.c:195) 
[ 15.005878][ C3] ? __pfx_ref_tracker_free (lib/ref_tracker.c:253) 
[ 15.005881][ 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:2366) 
[ 15.005886][ C3] ? rcu_do_batch (./include/linux/rcupdate.h:341 kernel/rcu/tree.c:2570) 
[ 15.005890][ C3] ? __pfx_ref_tracker_dir_exit (lib/ref_tracker.c:189) 
[ 15.005893][ C3] ? irq_exit_rcu (kernel/softirq.c:698) 
[ 15.005895][ C3] ? sysvec_apic_timer_interrupt (arch/x86/kernel/apic/apic.c:1049 arch/x86/kernel/apic/apic.c:1049) 
[ 15.005899][ C3] ? asm_sysvec_apic_timer_interrupt (./arch/x86/include/asm/idtentry.h:702) 
[ 15.005903][ C3] ? pv_native_safe_halt (arch/x86/kernel/paravirt.c:81) 
[ 15.005906][ C3] ? default_idle (./arch/x86/include/asm/paravirt.h:107 arch/x86/kernel/process.c:748) 
[ 15.005909][ C3] ? default_idle_call (./include/linux/cpuidle.h:143 kernel/sched/idle.c:118) 
[ 15.005912][ C3] ? cpuidle_idle_call (kernel/sched/idle.c:186) 
[ 15.005915][ C3] ? do_idle (kernel/sched/idle.c:325) 
[ 15.005918][ C3] ? cpu_startup_entry (kernel/sched/idle.c:422 (discriminator 1)) 
[ 15.005921][ C3] ? start_secondary (arch/x86/kernel/smpboot.c:203 arch/x86/kernel/smpboot.c:283) 
[ 15.005925][ C3] ? common_startup_64 (arch/x86/kernel/head_64.S:419) 
[ 15.005931][ C3] __put_net (net/core/net_namespace.c:732) 
[ 15.005935][ C3] __sk_destruct (./include/net/net_namespace.h:288 ./include/net/net_namespace.h:390 net/core/sock.c:2366) 
[ 15.005938][ C3] ? rcu_do_batch (kernel/rcu/tree.c:2568) 
[ 15.005941][ C3] rcu_do_batch (./include/linux/rcupdate.h:341 kernel/rcu/tree.c:2570) 
[ 15.005945][ C3] ? find_held_lock (kernel/locking/lockdep.c:5348) 
[ 15.005949][ C3] ? __pfx_rcu_do_batch (kernel/rcu/tree.c:2492) 
[ 15.005953][ C3] ? _raw_spin_unlock_irqrestore (./include/linux/spinlock_api_smp.h:151 kernel/locking/spinlock.c:194) 
[ 15.005957][ C3] ? lockdep_hardirqs_on (kernel/locking/lockdep.c:4473) 
[ 15.005960][ C3] ? _raw_spin_unlock_irqrestore (./arch/x86/include/asm/preempt.h:104 ./include/linux/spinlock_api_smp.h:152 kernel/locking/spinlock.c:194) 
[ 15.005965][ C3] rcu_core (kernel/rcu/tree.c:2826) 
[ 15.005969][ C3] handle_softirqs (kernel/softirq.c:579) 
[ 15.005973][ C3] __irq_exit_rcu (kernel/softirq.c:614 kernel/softirq.c:453 kernel/softirq.c:680) 
[ 15.005976][ C3] irq_exit_rcu (kernel/softirq.c:698) 
[ 15.005978][ C3] sysvec_apic_timer_interrupt (arch/x86/kernel/apic/apic.c:1049 arch/x86/kernel/apic/apic.c:1049) 
[   15.005982][    C3]  </IRQ>
[   15.005983][    C3]  <TASK>
[ 15.005984][ C3] asm_sysvec_apic_timer_interrupt (./arch/x86/include/asm/idtentry.h:702) 
[ 15.005987][ C3] RIP: 0010:pv_native_safe_halt (arch/x86/kernel/paravirt.c:81) 
[ 15.005991][ C3] Code: 60 b8 00 e9 c3 57 02 00 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 c3 75 13 00 fb f4 <c3> cc cc cc cc 66 2e 0f 1f 84 00 00 00 00 00 66 90 90 90 90 90 90
All code
========
   0:	60                   	(bad)
   1:	b8 00 e9 c3 57       	mov    $0x57c3e900,%eax
   6:	02 00                	add    (%rax),%al
   8:	0f 1f 00             	nopl   (%rax)
   b:	90                   	nop
   c:	90                   	nop
   d:	90                   	nop
   e:	90                   	nop
   f:	90                   	nop
  10:	90                   	nop
  11:	90                   	nop
  12:	90                   	nop
  13:	90                   	nop
  14:	90                   	nop
  15:	90                   	nop
  16:	90                   	nop
  17:	90                   	nop
  18:	90                   	nop
  19:	90                   	nop
  1a:	90                   	nop
  1b:	f3 0f 1e fa          	endbr64
  1f:	66 90                	xchg   %ax,%ax
  21:	0f 00 2d c3 75 13 00 	verw   0x1375c3(%rip)        # 0x1375eb
  28:	fb                   	sti
  29:	f4                   	hlt
  2a:*	c3                   	ret		<-- trapping instruction
  2b:	cc                   	int3
  2c:	cc                   	int3
  2d:	cc                   	int3
  2e:	cc                   	int3
  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:	c3                   	ret
   1:	cc                   	int3
   2:	cc                   	int3
   3:	cc                   	int3
   4:	cc                   	int3
   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
[   15.005993][    C3] RSP: 0018:ffffc90000157de8 EFLAGS: 00000242
[   15.005997][    C3] RAX: 0000000000046307 RBX: 1ffff9200002afc1 RCX: ffffffffa5d5ba19
[   15.005999][    C3] RDX: 0000000000000000 RSI: ffffffffa6887785 RDI: ffffffffa6051260
[   15.006001][    C3] RBP: 0000000000000000 R08: 0000000000000001 R09: ffffed1006c3667a
[   15.006003][    C3] R10: ffff8880361b33d3 R11: 0000000000000000 R12: 0000000000000000
[   15.006004][    C3] R13: ffff888001bf4640 R14: dffffc0000000000 R15: 0000000000000000
[ 15.006008][ C3] ? ct_kernel_exit.constprop.0 (kernel/context_tracking.c:146) 
[ 15.006013][ C3] default_idle (./arch/x86/include/asm/paravirt.h:107 arch/x86/kernel/process.c:748) 
[ 15.006015][ C3] default_idle_call (./include/linux/cpuidle.h:143 kernel/sched/idle.c:118) 
[ 15.006017][ C3] cpuidle_idle_call (kernel/sched/idle.c:186) 
[ 15.006021][ C3] ? __pfx_cpuidle_idle_call (kernel/sched/idle.c:168) 
[ 15.006025][ C3] ? tsc_verify_tsc_adjust (arch/x86/kernel/tsc_sync.c:59) 
[ 15.006030][ C3] do_idle (kernel/sched/idle.c:325) 
[ 15.006034][ C3] cpu_startup_entry (kernel/sched/idle.c:422 (discriminator 1)) 
[ 15.006038][ C3] start_secondary (arch/x86/kernel/smpboot.c:203 arch/x86/kernel/smpboot.c:283) 
[ 15.006041][ C3] ? __pfx_start_secondary (arch/x86/kernel/smpboot.c:233) 
[ 15.006046][ C3] common_startup_64 (arch/x86/kernel/head_64.S:419) 
| [   15.022311][    C3] RCU nest depth: 0, expected: 0
| [   15.022501][    C3] INFO: lockdep is turned off.
| [   15.022682][    C3] Preemption disabled at:
| [ 15.022683][ C3] 0x0 
[   15.023119][    C3] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[   15.023121][    C3] Call Trace:
[   15.023122][    C3]  <IRQ>
[ 15.023124][ C3] dump_stack_lvl (lib/dump_stack.c:123) 
[ 15.023129][ C3] __might_resched (kernel/sched/core.c:8819) 
[ 15.023135][ C3] down_write (./include/linux/kernel.h:73 kernel/locking/rwsem.c:1576) 
[ 15.023139][ C3] ? __pfx_down_write (kernel/locking/rwsem.c:1575) 
[ 15.023141][ C3] ? simple_recursive_removal (./include/linux/dcache.h:345 fs/libfs.c:610) 
[ 15.023145][ C3] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:736) 
[ 15.023151][ 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) 
[ 15.023155][ C3] simple_recursive_removal (./include/linux/dcache.h:409 ./include/linux/dcache.h:424 ./include/linux/dcache.h:434 fs/libfs.c:616) 
[ 15.023158][ C3] ? __pfx_remove_one (fs/debugfs/inode.c:780) 
[ 15.023162][ 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) 
[ 15.023166][ C3] debugfs_remove (fs/debugfs/inode.c:806 fs/debugfs/inode.c:799) 
[ 15.023169][ C3] ref_tracker_dir_exit (lib/ref_tracker.c:423 lib/ref_tracker.c:195) 
[ 15.023173][ C3] ? __pfx_ref_tracker_free (lib/ref_tracker.c:253) 
[ 15.023176][ 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:2366) 
[ 15.023180][ C3] ? rcu_do_batch (./include/linux/rcupdate.h:341 kernel/rcu/tree.c:2570) 
[ 15.023184][ C3] ? __pfx_ref_tracker_dir_exit (lib/ref_tracker.c:189) 
[ 15.023186][ C3] ? irq_exit_rcu (kernel/softirq.c:698) 
[ 15.023190][ C3] ? sysvec_apic_timer_interrupt (arch/x86/kernel/apic/apic.c:1049 arch/x86/kernel/apic/apic.c:1049) 
[ 15.023193][ C3] ? asm_sysvec_apic_timer_interrupt (./arch/x86/include/asm/idtentry.h:702) 
[ 15.023196][ C3] ? pv_native_safe_halt (arch/x86/kernel/paravirt.c:81) 
[ 15.023199][ C3] ? default_idle (./arch/x86/include/asm/paravirt.h:107 arch/x86/kernel/process.c:748) 
[ 15.023202][ C3] ? default_idle_call (./include/linux/cpuidle.h:143 kernel/sched/idle.c:118) 
[ 15.023204][ C3] ? cpuidle_idle_call (kernel/sched/idle.c:186) 
[ 15.023208][ C3] ? do_idle (kernel/sched/idle.c:325) 
[ 15.023211][ C3] ? cpu_startup_entry (kernel/sched/idle.c:422 (discriminator 1)) 
[ 15.023214][ C3] ? start_secondary (arch/x86/kernel/smpboot.c:203 arch/x86/kernel/smpboot.c:283) 
[ 15.023218][ C3] ? common_startup_64 (arch/x86/kernel/head_64.S:419) 
[ 15.023223][ C3] __put_net (net/core/net_namespace.c:732) 
[ 15.023226][ C3] __sk_destruct (./include/net/net_namespace.h:288 ./include/net/net_namespace.h:390 net/core/sock.c:2366) 
[ 15.023230][ C3] ? rcu_do_batch (kernel/rcu/tree.c:2568) 
[ 15.023233][ C3] rcu_do_batch (./include/linux/rcupdate.h:341 kernel/rcu/tree.c:2570) 
[ 15.023237][ C3] ? find_held_lock (kernel/locking/lockdep.c:5348) 
[ 15.023242][ C3] ? __pfx_rcu_do_batch (kernel/rcu/tree.c:2492) 
[ 15.023245][ C3] ? _raw_spin_unlock_irqrestore (./include/linux/spinlock_api_smp.h:151 kernel/locking/spinlock.c:194) 
[ 15.023249][ C3] ? lockdep_hardirqs_on (kernel/locking/lockdep.c:4473) 
[ 15.023252][ C3] ? _raw_spin_unlock_irqrestore (./arch/x86/include/asm/preempt.h:104 ./include/linux/spinlock_api_smp.h:152 kernel/locking/spinlock.c:194) 
[ 15.023257][ C3] rcu_core (kernel/rcu/tree.c:2826) 
[ 15.023260][ C3] handle_softirqs (kernel/softirq.c:579) 
[ 15.023265][ C3] __irq_exit_rcu (kernel/softirq.c:614 kernel/softirq.c:453 kernel/softirq.c:680) 
[ 15.023268][ C3] irq_exit_rcu (kernel/softirq.c:698) 
[ 15.023270][ C3] sysvec_apic_timer_interrupt (arch/x86/kernel/apic/apic.c:1049 arch/x86/kernel/apic/apic.c:1049) 
[   15.023273][    C3]  </IRQ>
[   15.023274][    C3]  <TASK>
[ 15.023276][ C3] asm_sysvec_apic_timer_interrupt (./arch/x86/include/asm/idtentry.h:702) 
[ 15.023278][ C3] RIP: 0010:pv_native_safe_halt (arch/x86/kernel/paravirt.c:81) 
[ 15.023282][ C3] Code: 60 b8 00 e9 c3 57 02 00 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 c3 75 13 00 fb f4 <c3> cc cc cc cc 66 2e 0f 1f 84 00 00 00 00 00 66 90 90 90 90 90 90
All code
========
   0:	60                   	(bad)
   1:	b8 00 e9 c3 57       	mov    $0x57c3e900,%eax
   6:	02 00                	add    (%rax),%al
   8:	0f 1f 00             	nopl   (%rax)
   b:	90                   	nop
   c:	90                   	nop
   d:	90                   	nop
   e:	90                   	nop
   f:	90                   	nop
  10:	90                   	nop
  11:	90                   	nop
  12:	90                   	nop
  13:	90                   	nop
  14:	90                   	nop
  15:	90                   	nop
  16:	90                   	nop
  17:	90                   	nop
  18:	90                   	nop
  19:	90                   	nop
  1a:	90                   	nop
  1b:	f3 0f 1e fa          	endbr64
  1f:	66 90                	xchg   %ax,%ax
  21:	0f 00 2d c3 75 13 00 	verw   0x1375c3(%rip)        # 0x1375eb
  28:	fb                   	sti
  29:	f4                   	hlt
  2a:*	c3                   	ret		<-- trapping instruction
  2b:	cc                   	int3
  2c:	cc                   	int3
  2d:	cc                   	int3
  2e:	cc                   	int3
  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:	c3                   	ret
   1:	cc                   	int3
   2:	cc                   	int3
   3:	cc                   	int3
   4:	cc                   	int3
   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
[   15.023285][    C3] RSP: 0018:ffffc90000157de8 EFLAGS: 00000242
[   15.023288][    C3] RAX: 0000000000046307 RBX: 1ffff9200002afc1 RCX: ffffffffa5d5ba19
[   15.023290][    C3] RDX: 0000000000000000 RSI: ffffffffa6887785 RDI: ffffffffa6051260
[   15.023292][    C3] RBP: 0000000000000000 R08: 0000000000000001 R09: ffffed1006c3667a
[   15.023293][    C3] R10: ffff8880361b33d3 R11: 0000000000000000 R12: 0000000000000000
[   15.023295][    C3] R13: ffff888001bf4640 R14: dffffc0000000000 R15: 0000000000000000
[ 15.023299][ C3] ? ct_kernel_exit.constprop.0 (kernel/context_tracking.c:146) 
[ 15.023303][ C3] default_idle (./arch/x86/include/asm/paravirt.h:107 arch/x86/kernel/process.c:748) 
[ 15.023306][ C3] default_idle_call (./include/linux/cpuidle.h:143 kernel/sched/idle.c:118) 
[ 15.023308][ C3] cpuidle_idle_call (kernel/sched/idle.c:186) 
[ 15.023312][ C3] ? __pfx_cpuidle_idle_call (kernel/sched/idle.c:168) 
[ 15.023317][ C3] ? tsc_verify_tsc_adjust (arch/x86/kernel/tsc_sync.c:59) 
[ 15.023321][ C3] do_idle (kernel/sched/idle.c:325) 
[ 15.023325][ C3] cpu_startup_entry (kernel/sched/idle.c:422 (discriminator 1)) 
[ 15.023329][ C3] start_secondary (arch/x86/kernel/smpboot.c:203 arch/x86/kernel/smpboot.c:283) 
[ 15.023333][ C3] ? __pfx_start_secondary (arch/x86/kernel/smpboot.c:233) 
[ 15.023338][ C3] common_startup_64 (arch/x86/kernel/head_64.S:419) 
| [   16.661570][    C3] INFO: lockdep is turned off.
| [   16.661781][    C3] Preemption disabled at:
| [ 16.661783][ C3] handle_softirqs (kernel/softirq.c:553) 
| [   16.662226][    C3] Tainted: [W]=WARN
[   16.662228][    C3] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[   16.662230][    C3] Call Trace:
[   16.662232][    C3]  <IRQ>
[ 16.662234][ C3] dump_stack_lvl (lib/dump_stack.c:123) 
[ 16.662240][ C3] __might_resched (kernel/sched/core.c:8819) 
[ 16.662246][ C3] down_write (./include/linux/kernel.h:73 kernel/locking/rwsem.c:1576) 
[ 16.662251][ C3] ? __pfx_down_write (kernel/locking/rwsem.c:1575) 
[ 16.662254][ C3] ? simple_recursive_removal (./include/linux/dcache.h:345 fs/libfs.c:610) 
[ 16.662259][ C3] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:736) 
[ 16.662266][ 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) 
[ 16.662270][ C3] simple_recursive_removal (./include/linux/dcache.h:409 ./include/linux/dcache.h:424 ./include/linux/dcache.h:434 fs/libfs.c:616) 
[ 16.662273][ C3] ? __pfx_remove_one (fs/debugfs/inode.c:780) 
[ 16.662277][ 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) 
[ 16.662282][ C3] debugfs_remove (fs/debugfs/inode.c:806 fs/debugfs/inode.c:799) 
[ 16.662285][ C3] ref_tracker_dir_exit (lib/ref_tracker.c:423 lib/ref_tracker.c:195) 
[ 16.662290][ C3] ? __pfx_ref_tracker_free (lib/ref_tracker.c:253) 
[ 16.662293][ 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:2366) 
[ 16.662299][ C3] ? rcu_do_batch (./include/linux/rcupdate.h:341 kernel/rcu/tree.c:2570) 
[ 16.662303][ C3] ? __pfx_ref_tracker_dir_exit (lib/ref_tracker.c:189) 
[ 16.662306][ C3] ? irq_exit_rcu (kernel/softirq.c:698) 
[ 16.662308][ C3] ? sysvec_apic_timer_interrupt (arch/x86/kernel/apic/apic.c:1049 arch/x86/kernel/apic/apic.c:1049) 
[ 16.662313][ C3] ? asm_sysvec_apic_timer_interrupt (./arch/x86/include/asm/idtentry.h:702) 
[ 16.662317][ C3] ? kernel_text_address (kernel/extable.c:99) 
[ 16.662322][ C3] ? __kernel_text_address (kernel/extable.c:79) 
[ 16.662325][ C3] ? unwind_get_return_address (arch/x86/kernel/unwind_orc.c:369 arch/x86/kernel/unwind_orc.c:364) 
[ 16.662330][ C3] ? arch_stack_walk (arch/x86/kernel/stacktrace.c:26) 
[ 16.662334][ C3] ? stack_trace_save (kernel/stacktrace.c:123) 
[ 16.662339][ C3] ? kasan_save_stack (mm/kasan/common.c:48) 
[ 16.662343][ C3] ? kasan_record_aux_stack (mm/kasan/generic.c:548) 
[ 16.662347][ C3] ? kmem_cache_free (mm/slub.c:2343 mm/slub.c:4642 mm/slub.c:4744) 
[ 16.662352][ C3] ? bpf_sk_storage_free (./include/linux/rcupdate.h:341 ./include/linux/rcupdate.h:871 net/core/bpf_sk_storage.c:61) 
[ 16.662356][ C3] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:736) 
[ 16.662361][ C3] __put_net (net/core/net_namespace.c:732) 
[ 16.662364][ C3] __sk_destruct (./include/net/net_namespace.h:288 ./include/net/net_namespace.h:390 net/core/sock.c:2366) 
[ 16.662368][ C3] ? rcu_do_batch (kernel/rcu/tree.c:2568) 
[ 16.662371][ C3] rcu_do_batch (./include/linux/rcupdate.h:341 kernel/rcu/tree.c:2570) 
[ 16.662376][ C3] ? __pfx_rcu_do_batch (kernel/rcu/tree.c:2492) 
[ 16.662380][ C3] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:736) 
[ 16.662384][ C3] ? trace_irq_enable.constprop.0 (./include/trace/events/preemptirq.h:40) 
[ 16.662393][ C3] rcu_core (kernel/rcu/tree.c:2826) 
[ 16.662397][ C3] handle_softirqs (kernel/softirq.c:579) 
[ 16.662402][ C3] __irq_exit_rcu (kernel/softirq.c:614 kernel/softirq.c:453 kernel/softirq.c:680) 
[ 16.662404][ C3] irq_exit_rcu (kernel/softirq.c:698) 
[ 16.662406][ C3] sysvec_apic_timer_interrupt (arch/x86/kernel/apic/apic.c:1049 arch/x86/kernel/apic/apic.c:1049) 
[   16.662410][    C3]  </IRQ>
[   16.662411][    C3]  <TASK>
[ 16.662412][ C3] asm_sysvec_apic_timer_interrupt (./arch/x86/include/asm/idtentry.h:702) 
[ 16.662415][ C3] RIP: 0010:kernel_text_address (kernel/extable.c:99) 
[ 16.662419][ C3] Code: 8b 44 24 04 eb b6 66 90 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 55 48 89 fd 53 48 83 ec 08 <e8> 39 ff ff ff 85 c0 74 10 b8 01 00 00 00 48 83 c4 08 5b 5d e9 55
All code
========
   0:	8b 44 24 04          	mov    0x4(%rsp),%eax
   4:	eb b6                	jmp    0xffffffffffffffbc
   6:	66 90                	xchg   %ax,%ax
   8:	90                   	nop
   9:	90                   	nop
   a:	90                   	nop
   b:	90                   	nop
   c:	90                   	nop
   d:	90                   	nop
   e:	90                   	nop
   f:	90                   	nop
  10:	90                   	nop
  11:	90                   	nop
  12:	90                   	nop
  13:	90                   	nop
  14:	90                   	nop
  15:	90                   	nop
  16:	90                   	nop
  17:	90                   	nop
  18:	66 0f 1f 00          	nopw   (%rax)
  1c:	0f 1f 44 00 00       	nopl   0x0(%rax,%rax,1)
  21:	55                   	push   %rbp
  22:	48 89 fd             	mov    %rdi,%rbp
  25:	53                   	push   %rbx
  26:	48 83 ec 08          	sub    $0x8,%rsp
  2a:*	e8 39 ff ff ff       	call   0xffffffffffffff68		<-- trapping instruction
  2f:	85 c0                	test   %eax,%eax
  31:	74 10                	je     0x43
  33:	b8 01 00 00 00       	mov    $0x1,%eax
  38:	48 83 c4 08          	add    $0x8,%rsp
  3c:	5b                   	pop    %rbx
  3d:	5d                   	pop    %rbp
  3e:	e9                   	.byte 0xe9
  3f:	55                   	push   %rbp

Code starting with the faulting instruction
===========================================
   0:	e8 39 ff ff ff       	call   0xffffffffffffff3e
   5:	85 c0                	test   %eax,%eax
   7:	74 10                	je     0x19
   9:	b8 01 00 00 00       	mov    $0x1,%eax
   e:	48 83 c4 08          	add    $0x8,%rsp
  12:	5b                   	pop    %rbx
  13:	5d                   	pop    %rbp
  14:	e9                   	.byte 0xe9
  15:	55                   	push   %rbp
[   16.662422][    C3] RSP: 0018:ffffc900007176b0 EFLAGS: 00000282
[   16.662426][    C3] RAX: dffffc0000000000 RBX: ffffffffa30b27f6 RCX: ffffc90000718001
[   16.662428][    C3] RDX: 1ffff920000e2eea RSI: ffffffffa60511e0 RDI: ffffffffa30b27f6
[   16.662429][    C3] RBP: ffffffffa30b27f6 R08: 0000000000000000 R09: ffffc90000717739
[   16.662431][    C3] R10: ffffffffa340c3f7 R11: ffffc90000717738 R12: ffffc900007177c0
[   16.662433][    C3] R13: 0000000000000000 R14: ffff888006458040 R15: ffff888001051e40
[ 16.662436][ C3] ? x64_sys_call (arch/x86/entry/syscall_64.c:37) 
[ 16.662441][ C3] ? x64_sys_call (arch/x86/entry/syscall_64.c:37) 
[ 16.662443][ C3] ? 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) 
[ 16.662448][ C3] ? x64_sys_call (arch/x86/entry/syscall_64.c:37) 
[ 16.662452][ C3] ? x64_sys_call (arch/x86/entry/syscall_64.c:37) 
[ 16.662454][ C3] __kernel_text_address (kernel/extable.c:79) 
[ 16.662458][ C3] unwind_get_return_address (arch/x86/kernel/unwind_orc.c:369 arch/x86/kernel/unwind_orc.c:364) 
[ 16.662461][ C3] ? __pfx_stack_trace_consume_entry (kernel/stacktrace.c:83) 
[ 16.662464][ C3] arch_stack_walk (arch/x86/kernel/stacktrace.c:26) 
[ 16.662469][ C3] ? x64_sys_call (arch/x86/entry/syscall_64.c:37) 
[ 16.662473][ C3] stack_trace_save (kernel/stacktrace.c:123) 
[ 16.662477][ C3] ? __pfx_stack_trace_save (kernel/stacktrace.c:114) 
[ 16.662481][ C3] ? kasan_save_stack (mm/kasan/common.c:49) 
[ 16.662484][ C3] ? kasan_save_stack (mm/kasan/common.c:48) 
[ 16.662488][ C3] kasan_save_stack (mm/kasan/common.c:48) 
[ 16.662491][ C3] ? kasan_save_stack (mm/kasan/common.c:48) 
[ 16.662494][ C3] ? kasan_record_aux_stack (mm/kasan/generic.c:548) 
[ 16.662496][ C3] ? kmem_cache_free (mm/slub.c:2343 mm/slub.c:4642 mm/slub.c:4744) 
[ 16.662500][ C3] ? __put_anon_vma (mm/rmap.c:2757) 
[ 16.662504][ C3] ? unlink_anon_vmas (./include/linux/rmap.h:117 mm/rmap.c:444) 
[ 16.662506][ C3] ? free_pgtables (mm/memory.c:392) 
[ 16.662510][ C3] ? exit_mmap (mm/mmap.c:1297) 
[ 16.662513][ C3] ? mmput (kernel/fork.c:1447 kernel/fork.c:1382 kernel/fork.c:1402) 
[ 16.662518][ C3] ? exit_mm (kernel/exit.c:590) 
[ 16.662521][ C3] ? do_exit (kernel/exit.c:943) 
[ 16.662524][ C3] ? do_group_exit (kernel/exit.c:1083) 
[ 16.662526][ C3] ? __x64_sys_exit_group (kernel/exit.c:1111) 
[ 16.662529][ C3] ? stack_depot_save_flags (lib/stackdepot.c:552 lib/stackdepot.c:619) 
[ 16.662535][ C3] ? do_raw_spin_lock (./arch/x86/include/asm/atomic.h:107 ./include/linux/atomic/atomic-arch-fallback.h:2170 ./include/linux/atomic/atomic-instrumented.h:1302 ./include/asm-generic/qspinlock.h:111 kernel/locking/spinlock_debug.c:116) 
[ 16.662538][ C3] ? __pfx_do_raw_spin_lock (kernel/locking/spinlock_debug.c:114) 
[ 16.662541][ C3] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:736) 
[ 16.662545][ C3] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:736) 
[ 16.662549][ C3] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:736) 
[ 16.662552][ C3] ? __virt_addr_valid (./include/linux/rcupdate.h:341 ./include/linux/rcupdate.h:953 ./include/linux/mmzone.h:2127 arch/x86/mm/physaddr.c:65) 
[ 16.662556][ C3] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:736) 
[ 16.662559][ C3] ? trace_lock_release (./include/trace/events/lock.h:69 (discriminator 21)) 
[ 16.662563][ C3] ? lock_release (kernel/locking/lockdep.c:118 kernel/locking/lockdep.c:5879) 
[ 16.662566][ C3] ? __virt_addr_valid (./arch/x86/include/asm/preempt.h:104 ./include/linux/rcupdate.h:955 ./include/linux/mmzone.h:2127 arch/x86/mm/physaddr.c:65) 
[ 16.662569][ C3] kasan_record_aux_stack (mm/kasan/generic.c:548) 
[ 16.662573][ C3] kmem_cache_free (mm/slub.c:2343 mm/slub.c:4642 mm/slub.c:4744) 
[ 16.662576][ C3] ? __put_anon_vma (mm/rmap.c:2757) 
[ 16.662580][ C3] __put_anon_vma (mm/rmap.c:2757) 
[ 16.662584][ C3] unlink_anon_vmas (./include/linux/rmap.h:117 mm/rmap.c:444) 
[ 16.662587][ C3] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:736) 
[ 16.662592][ C3] free_pgtables (mm/memory.c:392) 
[ 16.662597][ C3] ? __pfx_free_pgtables (mm/memory.c:349) 
[ 16.662600][ C3] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5829) 
[ 16.662602][ C3] ? exit_mmap (./include/linux/seqlock.h:431 ./include/linux/mmap_lock.h:82 ./include/linux/mmap_lock.h:129 mm/mmap.c:1292) 
[ 16.662606][ C3] ? down_write (./arch/x86/include/asm/preempt.h:104 kernel/locking/rwsem.c:1307 kernel/locking/rwsem.c:1313 kernel/locking/rwsem.c:1578) 
[ 16.662608][ C3] ? __pfx_down_write (kernel/locking/rwsem.c:1575) 
[ 16.662611][ C3] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:736) 
[ 16.662615][ C3] ? trace_lock_release (./include/trace/events/lock.h:69 (discriminator 21)) 
[ 16.662619][ C3] exit_mmap (mm/mmap.c:1297) 
[ 16.662622][ C3] ? __pfx_exit_mmap (mm/mmap.c:1259) 
[ 16.662625][ C3] ? __mutex_lock (./arch/x86/include/asm/preempt.h:104 kernel/locking/mutex.c:727 kernel/locking/mutex.c:746) 
[ 16.662628][ C3] ? lock_release (kernel/locking/lockdep.c:118 kernel/locking/lockdep.c:5879) 
[ 16.662631][ C3] ? __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) 
[ 16.662639][ C3] mmput (kernel/fork.c:1447 kernel/fork.c:1382 kernel/fork.c:1402) 
[ 16.662643][ C3] exit_mm (kernel/exit.c:590) 
[ 16.662646][ C3] do_exit (kernel/exit.c:943) 
[ 16.662650][ C3] do_group_exit (kernel/exit.c:1083) 
[ 16.662654][ C3] __x64_sys_exit_group (kernel/exit.c:1111) 
[ 16.662657][ C3] x64_sys_call (arch/x86/entry/syscall_64.c:37) 
[ 16.662660][ C3] do_syscall_64 (arch/x86/entry/syscall_64.c:63 arch/x86/entry/syscall_64.c:94) 
[ 16.662664][ C3] entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:130) 
[   16.662667][    C3] RIP: 0033:0x7f595ddf5abd
[ 16.662670][ C3] Code: Unable to access opcode bytes at 0x7f595ddf5a93.

Code starting with the faulting instruction
===========================================
[   16.662671][    C3] RSP: 002b:00007ffcb7b44cf8 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7
[   16.662674][    C3] RAX: ffffffffffffffda RBX: 00007f595ded29c0 RCX: 00007f595ddf5abd
[   16.662676][    C3] RDX: 00000000000000e7 RSI: ffffffffffffff80 RDI: 0000000000000000
[   16.662678][    C3] RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000030
[   16.662679][    C3] R10: 00007ffcb7b44b80 R11: 0000000000000246 R12: 00007f595ded29c0


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