======================================
| [   16.571833][    C0] 1 lock held by ksft_runner.sh/219:
| [ 16.572035][ C0] #0: ffffffff855774c0 (rcu_callback){....}-{0:0}, at: rcu_do_batch (./include/linux/rcupdate.h:331 kernel/rcu/tree.c:2570) 
| [   16.572390][    C0]
| [   16.572390][    C0] stack backtrace:
[   16.572645][    C0] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[   16.572648][    C0] Call Trace:
[   16.572650][    C0]  <IRQ>
[ 16.572652][ C0] dump_stack_lvl (lib/dump_stack.c:123) 
[ 16.572658][ C0] print_usage_bug.part.0 (kernel/locking/lockdep.c:4048) 
[ 16.572663][ C0] mark_lock_irq (kernel/locking/lockdep.c:4013 kernel/locking/lockdep.c:4059 kernel/locking/lockdep.c:4270) 
[ 16.572668][ C0] ? rcu_read_lock_any_held (kernel/rcu/update.c:386 kernel/rcu/update.c:380) 
[ 16.572672][ C0] ? validate_chain (kernel/locking/lockdep.c:3804 kernel/locking/lockdep.c:3824 kernel/locking/lockdep.c:3879) 
[ 16.572677][ C0] mark_lock (kernel/locking/lockdep.c:4756) 
[ 16.572680][ C0] mark_usage (kernel/locking/lockdep.c:4645) 
[ 16.572683][ C0] __lock_acquire (kernel/locking/lockdep.c:5194) 
[ 16.572686][ C0] ? __lock_acquire (kernel/locking/lockdep.c:5240) 
[ 16.572690][ C0] lock_acquire.part.0 (kernel/locking/lockdep.c:473 kernel/locking/lockdep.c:5873) 
[ 16.572693][ C0] ? simple_pin_fs (fs/libfs.c:1067) 
[ 16.572699][ C0] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:745) 
[ 16.572703][ C0] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5834) 
[ 16.572705][ C0] ? simple_pin_fs (fs/libfs.c:1067) 
[ 16.572710][ C0] _raw_spin_lock (./include/linux/spinlock_api_smp.h:134 kernel/locking/spinlock.c:154) 
[ 16.572713][ C0] ? simple_pin_fs (fs/libfs.c:1067) 
[ 16.572717][ C0] simple_pin_fs (fs/libfs.c:1067) 
[ 16.572721][ C0] debugfs_remove (fs/debugfs/inode.c:805 fs/debugfs/inode.c:799) 
[ 16.572724][ C0] ref_tracker_dir_exit (lib/ref_tracker.c:411 lib/ref_tracker.c:195) 
[ 16.572731][ C0] ? __pfx_ref_tracker_free (lib/ref_tracker.c:253) 
[ 16.572734][ C0] ? __sk_destruct (./include/linux/instrumented.h:96 ./include/linux/atomic/atomic-instrumented.h:400 ./include/linux/refcount.h:389 ./include/linux/refcount.h:432 ./include/linux/refcount.h:450 ./include/net/net_namespace.h:287 ./include/net/net_namespace.h:390 net/core/sock.c:2376) 
[ 16.572740][ C0] ? rcu_do_batch (kernel/rcu/tree.c:2576) 
[ 16.572743][ C0] ? __pfx_ref_tracker_dir_exit (lib/ref_tracker.c:189) 
[ 16.572746][ C0] ? __local_bh_enable_ip (kernel/softirq.c:407) 
[ 16.572749][ C0] ? copy_fpstate_to_sigframe (arch/x86/kernel/fpu/signal.c:222) 
[ 16.572752][ C0] ? get_sigframe (arch/x86/kernel/signal.c:163) 
[ 16.572757][ C0] ? x64_setup_rt_frame (./arch/x86/include/asm/bitops.h:206 ./arch/x86/include/asm/bitops.h:238 arch/x86/kernel/signal_64.c:153 arch/x86/kernel/signal_64.c:176) 
[ 16.572760][ C0] ? handle_signal (arch/x86/kernel/signal.c:250 arch/x86/kernel/signal.c:294) 
[ 16.572763][ C0] ? arch_do_signal_or_restart (arch/x86/kernel/signal.c:340) 
[ 16.572767][ C0] ? exit_to_user_mode_loop (kernel/entry/common.c:113) 
[ 16.572771][ C0] ? do_syscall_64 (./include/linux/entry-common.h:330 ./include/linux/entry-common.h:414 ./include/linux/entry-common.h:449 arch/x86/entry/syscall_64.c:100) 
[ 16.572775][ C0] ? entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:130) 
[ 16.572781][ C0] __put_net (net/core/net_namespace.c:732) 
[ 16.572785][ C0] __sk_destruct (./include/net/net_namespace.h:288 ./include/net/net_namespace.h:390 net/core/sock.c:2376) 
[ 16.572792][ C0] ? rcu_do_batch (kernel/rcu/tree.c:2576) 
[ 16.572796][ C0] rcu_do_batch (kernel/rcu/tree.c:2576) 
[ 16.572805][ C0] ? __pfx_rcu_do_batch (kernel/rcu/tree.c:2500) 
[ 16.572809][ C0] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:745) 
[ 16.572812][ C0] ? note_gp_changes (kernel/rcu/tree.c:1326 (discriminator 1)) 
[ 16.572815][ C0] ? lockdep_hardirqs_on (kernel/locking/lockdep.c:4475) 
[ 16.572820][ C0] rcu_core (kernel/rcu/tree.c:2834) 
[ 16.572824][ C0] handle_softirqs (kernel/softirq.c:579) 
[ 16.572828][ C0] ? copy_fpstate_to_sigframe (./include/linux/bottom_half.h:33 ./arch/x86/include/asm/fpu/api.h:77 arch/x86/kernel/fpu/signal.c:220) 
[ 16.572832][ C0] do_softirq (kernel/softirq.c:480 kernel/softirq.c:467) 
[   16.572835][    C0]  </IRQ>
[   16.572836][    C0]  <TASK>
[ 16.572837][ C0] __local_bh_enable_ip (kernel/softirq.c:407) 
[ 16.572840][ C0] copy_fpstate_to_sigframe (arch/x86/kernel/fpu/signal.c:222) 
[ 16.572844][ C0] ? fpu__alloc_mathframe (arch/x86/kernel/fpu/signal.c:493) 
[ 16.572847][ C0] get_sigframe (arch/x86/kernel/signal.c:163) 
[ 16.572852][ C0] ? __pfx_get_sigframe (arch/x86/kernel/signal.c:96) 
[ 16.572856][ C0] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:745) 
[ 16.572859][ C0] ? trace_rseq_update (./include/trace/events/rseq.h:11 (discriminator 21)) 
[ 16.572866][ C0] x64_setup_rt_frame (./arch/x86/include/asm/bitops.h:206 ./arch/x86/include/asm/bitops.h:238 arch/x86/kernel/signal_64.c:153 arch/x86/kernel/signal_64.c:176) 
[ 16.572870][ C0] ? __pfx___rseq_handle_notify_resume (kernel/rseq.c:425) 
[ 16.572875][ C0] ? __pfx_x64_setup_rt_frame (arch/x86/kernel/signal_64.c:165) 
[ 16.572878][ C0] ? __lock_release (kernel/locking/lockdep.c:5539) 
[ 16.572881][ C0] ? _raw_spin_unlock_irq (./arch/x86/include/asm/irqflags.h:42 ./arch/x86/include/asm/irqflags.h:119 ./include/linux/spinlock_api_smp.h:159 kernel/locking/spinlock.c:202) 
[ 16.572886][ C0] handle_signal (arch/x86/kernel/signal.c:250 arch/x86/kernel/signal.c:294) 
[ 16.572890][ C0] arch_do_signal_or_restart (arch/x86/kernel/signal.c:340) 
[ 16.572894][ C0] ? __pfx_arch_do_signal_or_restart (arch/x86/kernel/signal.c:334) 
[ 16.572900][ C0] ? do_user_addr_fault (./arch/x86/include/asm/atomic.h:93 ./include/linux/atomic/atomic-arch-fallback.h:949 ./include/linux/atomic/atomic-instrumented.h:401 ./include/linux/refcount.h:389 ./include/linux/refcount.h:432 ./include/linux/mm.h:704 ./include/linux/mm.h:799 arch/x86/mm/fault.c:1338) 
[ 16.572904][ C0] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:745) 
[ 16.572908][ C0] exit_to_user_mode_loop (kernel/entry/common.c:113) 
[ 16.572912][ C0] do_syscall_64 (./include/linux/entry-common.h:330 ./include/linux/entry-common.h:414 ./include/linux/entry-common.h:449 arch/x86/entry/syscall_64.c:100) 
[ 16.572915][ C0] entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:130) 
[   16.572918][    C0] RIP: 0033:0x7f3b4c3ce83b
[ 16.572922][ C0] Code: 48 85 f6 74 15 48 b9 00 00 00 80 01 00 00 00 48 8b 06 48 85 c8 75 48 49 89 f0 41 ba 08 00 00 00 4c 89 c6 b8 0e 00 00 00 0f 05 <89> c2 f7 da 3d 00 f0 ff ff b8 00 00 00 00 0f 47 c2 48 8b 94 24 88
All code
========
   0:	48 85 f6             	test   %rsi,%rsi
   3:	74 15                	je     0x1a
   5:	48 b9 00 00 00 80 01 	movabs $0x180000000,%rcx
   c:	00 00 00 
   f:	48 8b 06             	mov    (%rsi),%rax
  12:	48 85 c8             	test   %rcx,%rax
  15:	75 48                	jne    0x5f
  17:	49 89 f0             	mov    %rsi,%r8
  1a:	41 ba 08 00 00 00    	mov    $0x8,%r10d
  20:	4c 89 c6             	mov    %r8,%rsi
  23:	b8 0e 00 00 00       	mov    $0xe,%eax
  28:	0f 05                	syscall
  2a:*	89 c2                	mov    %eax,%edx		<-- trapping instruction
  2c:	f7 da                	neg    %edx
  2e:	3d 00 f0 ff ff       	cmp    $0xfffff000,%eax
  33:	b8 00 00 00 00       	mov    $0x0,%eax
  38:	0f 47 c2             	cmova  %edx,%eax
  3b:	48                   	rex.W
  3c:	8b                   	.byte 0x8b
  3d:	94                   	xchg   %eax,%esp
  3e:	24 88                	and    $0x88,%al

Code starting with the faulting instruction
===========================================
   0:	89 c2                	mov    %eax,%edx
   2:	f7 da                	neg    %edx
   4:	3d 00 f0 ff ff       	cmp    $0xfffff000,%eax
   9:	b8 00 00 00 00       	mov    $0x0,%eax
   e:	0f 47 c2             	cmova  %edx,%eax
  11:	48                   	rex.W
  12:	8b                   	.byte 0x8b
  13:	94                   	xchg   %eax,%esp
  14:	24 88                	and    $0x88,%al
[   16.572924][    C0] RSP: 002b:00007fffee2289e0 EFLAGS: 00000246 ORIG_RAX: 000000000000000e
[   16.572928][    C0] RAX: 0000000000000000 RBX: 0000000000000000 RCX: 00007f3b4c3ce83b
[   16.572930][    C0] RDX: 0000000000000000 RSI: 00007fffee228aa0 RDI: 0000000000000002
[   16.572932][    C0] RBP: 0000000000000000 R08: 00007fffee228aa0 R09: 0000000000000000
[   16.572934][    C0] R10: 0000000000000008 R11: 0000000000000246 R12: 000055d269f1e620
[   16.572935][    C0] R13: 000055d269f78440 R14: 00007fffee228aa0 R15: 0000000000000000
| [   16.590002][    C0] RCU nest depth: 0, expected: 0
| [   16.590189][    C0] INFO: lockdep is turned off.
| [   16.590373][    C0] Preemption disabled at:
| [ 16.590375][ C0] copy_fpstate_to_sigframe (./include/linux/instrumented.h:68 ./include/asm-generic/bitops/instrumented-non-atomic.h:141 ./include/linux/thread_info.h:126 arch/x86/kernel/fpu/signal.c:214) 
[   16.590795][    C0] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[   16.590797][    C0] Call Trace:
[   16.590799][    C0]  <IRQ>
[ 16.590801][ C0] dump_stack_lvl (lib/dump_stack.c:123) 
[ 16.590807][ C0] __might_resched (kernel/sched/core.c:8796) 
[ 16.590814][ C0] down_write (./include/linux/kernel.h:73 kernel/locking/rwsem.c:1576) 
[ 16.590818][ C0] ? __pfx_down_write (kernel/locking/rwsem.c:1575) 
[ 16.590821][ C0] ? simple_recursive_removal (fs/libfs.c:614) 
[ 16.590825][ C0] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:745) 
[ 16.590830][ C0] ? 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) 
[ 16.590836][ C0] simple_recursive_removal (./include/linux/dcache.h:409 ./include/linux/dcache.h:424 ./include/linux/dcache.h:434 fs/libfs.c:617) 
[ 16.590839][ C0] ? 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) 
[ 16.590842][ C0] ? __pfx_remove_one (fs/debugfs/inode.c:780) 
[ 16.590847][ C0] debugfs_remove (fs/debugfs/inode.c:806 fs/debugfs/inode.c:799) 
[ 16.590850][ C0] ref_tracker_dir_exit (lib/ref_tracker.c:411 lib/ref_tracker.c:195) 
[ 16.590856][ C0] ? __pfx_ref_tracker_free (lib/ref_tracker.c:253) 
[ 16.590859][ C0] ? __sk_destruct (./include/linux/instrumented.h:96 ./include/linux/atomic/atomic-instrumented.h:400 ./include/linux/refcount.h:389 ./include/linux/refcount.h:432 ./include/linux/refcount.h:450 ./include/net/net_namespace.h:287 ./include/net/net_namespace.h:390 net/core/sock.c:2376) 
[ 16.590864][ C0] ? rcu_do_batch (kernel/rcu/tree.c:2576) 
[ 16.590868][ C0] ? __pfx_ref_tracker_dir_exit (lib/ref_tracker.c:189) 
[ 16.590871][ C0] ? __local_bh_enable_ip (kernel/softirq.c:407) 
[ 16.590875][ C0] ? copy_fpstate_to_sigframe (arch/x86/kernel/fpu/signal.c:222) 
[ 16.590877][ C0] ? get_sigframe (arch/x86/kernel/signal.c:163) 
[ 16.590882][ C0] ? x64_setup_rt_frame (./arch/x86/include/asm/bitops.h:206 ./arch/x86/include/asm/bitops.h:238 arch/x86/kernel/signal_64.c:153 arch/x86/kernel/signal_64.c:176) 
[ 16.590885][ C0] ? handle_signal (arch/x86/kernel/signal.c:250 arch/x86/kernel/signal.c:294) 
[ 16.590888][ C0] ? arch_do_signal_or_restart (arch/x86/kernel/signal.c:340) 
[ 16.590892][ C0] ? exit_to_user_mode_loop (kernel/entry/common.c:113) 
[ 16.590895][ C0] ? do_syscall_64 (./include/linux/entry-common.h:330 ./include/linux/entry-common.h:414 ./include/linux/entry-common.h:449 arch/x86/entry/syscall_64.c:100) 
[ 16.590899][ C0] ? entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:130) 
[ 16.590905][ C0] __put_net (net/core/net_namespace.c:732) 
[ 16.590908][ C0] __sk_destruct (./include/net/net_namespace.h:288 ./include/net/net_namespace.h:390 net/core/sock.c:2376) 
[ 16.590912][ C0] ? rcu_do_batch (kernel/rcu/tree.c:2576) 
[ 16.590915][ C0] rcu_do_batch (kernel/rcu/tree.c:2576) 
[ 16.590920][ C0] ? __pfx_rcu_do_batch (kernel/rcu/tree.c:2500) 
[ 16.590923][ C0] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:745) 
[ 16.590926][ C0] ? note_gp_changes (kernel/rcu/tree.c:1326 (discriminator 1)) 
[ 16.590929][ C0] ? lockdep_hardirqs_on (kernel/locking/lockdep.c:4475) 
[ 16.590933][ C0] rcu_core (kernel/rcu/tree.c:2834) 
[ 16.590937][ C0] handle_softirqs (kernel/softirq.c:579) 
[ 16.590941][ C0] ? copy_fpstate_to_sigframe (./include/linux/bottom_half.h:33 ./arch/x86/include/asm/fpu/api.h:77 arch/x86/kernel/fpu/signal.c:220) 
[ 16.590944][ C0] do_softirq (kernel/softirq.c:480 kernel/softirq.c:467) 
[   16.590947][    C0]  </IRQ>
[   16.590948][    C0]  <TASK>
[ 16.590950][ C0] __local_bh_enable_ip (kernel/softirq.c:407) 
[ 16.590953][ C0] copy_fpstate_to_sigframe (arch/x86/kernel/fpu/signal.c:222) 
[ 16.590956][ C0] ? fpu__alloc_mathframe (arch/x86/kernel/fpu/signal.c:493) 
[ 16.590960][ C0] get_sigframe (arch/x86/kernel/signal.c:163) 
[ 16.590965][ C0] ? __pfx_get_sigframe (arch/x86/kernel/signal.c:96) 
[ 16.590969][ C0] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:745) 
[ 16.590972][ C0] ? trace_rseq_update (./include/trace/events/rseq.h:11 (discriminator 21)) 
[ 16.590978][ C0] x64_setup_rt_frame (./arch/x86/include/asm/bitops.h:206 ./arch/x86/include/asm/bitops.h:238 arch/x86/kernel/signal_64.c:153 arch/x86/kernel/signal_64.c:176) 
[ 16.590983][ C0] ? __pfx___rseq_handle_notify_resume (kernel/rseq.c:425) 
[ 16.590987][ C0] ? __pfx_x64_setup_rt_frame (arch/x86/kernel/signal_64.c:165) 
[ 16.590990][ C0] ? __lock_release (kernel/locking/lockdep.c:5539) 
[ 16.590994][ C0] ? _raw_spin_unlock_irq (./arch/x86/include/asm/irqflags.h:42 ./arch/x86/include/asm/irqflags.h:119 ./include/linux/spinlock_api_smp.h:159 kernel/locking/spinlock.c:202) 
[ 16.590999][ C0] handle_signal (arch/x86/kernel/signal.c:250 arch/x86/kernel/signal.c:294) 
[ 16.591003][ C0] arch_do_signal_or_restart (arch/x86/kernel/signal.c:340) 
[ 16.591007][ C0] ? __pfx_arch_do_signal_or_restart (arch/x86/kernel/signal.c:334) 
[ 16.591013][ C0] ? do_user_addr_fault (./arch/x86/include/asm/atomic.h:93 ./include/linux/atomic/atomic-arch-fallback.h:949 ./include/linux/atomic/atomic-instrumented.h:401 ./include/linux/refcount.h:389 ./include/linux/refcount.h:432 ./include/linux/mm.h:704 ./include/linux/mm.h:799 arch/x86/mm/fault.c:1338) 
[ 16.591016][ C0] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:745) 
[ 16.591020][ C0] exit_to_user_mode_loop (kernel/entry/common.c:113) 
[ 16.591023][ C0] do_syscall_64 (./include/linux/entry-common.h:330 ./include/linux/entry-common.h:414 ./include/linux/entry-common.h:449 arch/x86/entry/syscall_64.c:100) 
[ 16.591027][ C0] entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:130) 
[   16.591030][    C0] RIP: 0033:0x7f3b4c3ce83b
[ 16.591033][ C0] Code: 48 85 f6 74 15 48 b9 00 00 00 80 01 00 00 00 48 8b 06 48 85 c8 75 48 49 89 f0 41 ba 08 00 00 00 4c 89 c6 b8 0e 00 00 00 0f 05 <89> c2 f7 da 3d 00 f0 ff ff b8 00 00 00 00 0f 47 c2 48 8b 94 24 88
All code
========
   0:	48 85 f6             	test   %rsi,%rsi
   3:	74 15                	je     0x1a
   5:	48 b9 00 00 00 80 01 	movabs $0x180000000,%rcx
   c:	00 00 00 
   f:	48 8b 06             	mov    (%rsi),%rax
  12:	48 85 c8             	test   %rcx,%rax
  15:	75 48                	jne    0x5f
  17:	49 89 f0             	mov    %rsi,%r8
  1a:	41 ba 08 00 00 00    	mov    $0x8,%r10d
  20:	4c 89 c6             	mov    %r8,%rsi
  23:	b8 0e 00 00 00       	mov    $0xe,%eax
  28:	0f 05                	syscall
  2a:*	89 c2                	mov    %eax,%edx		<-- trapping instruction
  2c:	f7 da                	neg    %edx
  2e:	3d 00 f0 ff ff       	cmp    $0xfffff000,%eax
  33:	b8 00 00 00 00       	mov    $0x0,%eax
  38:	0f 47 c2             	cmova  %edx,%eax
  3b:	48                   	rex.W
  3c:	8b                   	.byte 0x8b
  3d:	94                   	xchg   %eax,%esp
  3e:	24 88                	and    $0x88,%al

Code starting with the faulting instruction
===========================================
   0:	89 c2                	mov    %eax,%edx
   2:	f7 da                	neg    %edx
   4:	3d 00 f0 ff ff       	cmp    $0xfffff000,%eax
   9:	b8 00 00 00 00       	mov    $0x0,%eax
   e:	0f 47 c2             	cmova  %edx,%eax
  11:	48                   	rex.W
  12:	8b                   	.byte 0x8b
  13:	94                   	xchg   %eax,%esp
  14:	24 88                	and    $0x88,%al
[   16.591036][    C0] RSP: 002b:00007fffee2289e0 EFLAGS: 00000246 ORIG_RAX: 000000000000000e
[   16.591039][    C0] RAX: 0000000000000000 RBX: 0000000000000000 RCX: 00007f3b4c3ce83b
[   16.591041][    C0] RDX: 0000000000000000 RSI: 00007fffee228aa0 RDI: 0000000000000002
[   16.591043][    C0] RBP: 0000000000000000 R08: 00007fffee228aa0 R09: 0000000000000000
[   16.591044][    C0] R10: 0000000000000008 R11: 0000000000000246 R12: 000055d269f1e620
[   16.591046][    C0] R13: 000055d269f78440 R14: 00007fffee228aa0 R15: 0000000000000000
| [   18.988941][    C3] INFO: lockdep is turned off.
| [   18.989133][    C3] Preemption disabled at:
| [ 18.989135][ C3] 0x0 
| [   18.989482][    C3] Tainted: [W]=WARN
[   18.989484][    C3] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[   18.989486][    C3] Call Trace:
[   18.989488][    C3]  <IRQ>
[ 18.989491][ C3] dump_stack_lvl (lib/dump_stack.c:123) 
[ 18.989502][ C3] __might_resched (kernel/sched/core.c:8796) 
[ 18.989511][ C3] down_write (./include/linux/kernel.h:73 kernel/locking/rwsem.c:1576) 
[ 18.989517][ C3] ? __pfx_down_write (kernel/locking/rwsem.c:1575) 
[ 18.989520][ C3] ? simple_recursive_removal (fs/libfs.c:614) 
[ 18.989526][ C3] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:745) 
[ 18.989532][ 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) 
[ 18.989543][ C3] simple_recursive_removal (./include/linux/dcache.h:409 ./include/linux/dcache.h:424 ./include/linux/dcache.h:434 fs/libfs.c:617) 
[ 18.989546][ 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) 
[ 18.989550][ C3] ? __pfx_remove_one (fs/debugfs/inode.c:780) 
[ 18.989556][ C3] debugfs_remove (fs/debugfs/inode.c:806 fs/debugfs/inode.c:799) 
[ 18.989559][ C3] ref_tracker_dir_exit (lib/ref_tracker.c:411 lib/ref_tracker.c:195) 
[ 18.989567][ C3] ? __pfx_ref_tracker_free (lib/ref_tracker.c:253) 
[ 18.989570][ 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) 
[ 18.989578][ C3] ? rcu_do_batch (kernel/rcu/tree.c:2576) 
[ 18.989582][ C3] ? __pfx_ref_tracker_dir_exit (lib/ref_tracker.c:189) 
[ 18.989586][ C3] ? irq_exit_rcu (kernel/softirq.c:698) 
[ 18.989592][ C3] ? sysvec_apic_timer_interrupt (arch/x86/kernel/apic/apic.c:1050 arch/x86/kernel/apic/apic.c:1050) 
[ 18.989598][ C3] ? asm_sysvec_apic_timer_interrupt (./arch/x86/include/asm/idtentry.h:702) 
[ 18.989603][ C3] ? pv_native_safe_halt (arch/x86/kernel/paravirt.c:82) 
[ 18.989606][ C3] ? default_idle (./arch/x86/include/asm/paravirt.h:107 arch/x86/kernel/process.c:743) 
[ 18.989609][ C3] ? default_idle_call (./include/linux/cpuidle.h:143 kernel/sched/idle.c:118) 
[ 18.989612][ C3] ? cpuidle_idle_call (kernel/sched/idle.c:186) 
[ 18.989617][ C3] ? do_idle (kernel/sched/idle.c:325) 
[ 18.989619][ C3] ? cpu_startup_entry (kernel/sched/idle.c:422 (discriminator 1)) 
[ 18.989621][ C3] ? start_secondary (arch/x86/kernel/smpboot.c:203 arch/x86/kernel/smpboot.c:283) 
[ 18.989626][ C3] ? common_startup_64 (arch/x86/kernel/head_64.S:419) 
[ 18.989634][ C3] ? bpf_sk_storage_free (./include/linux/rcupdate.h:341 ./include/linux/rcupdate.h:871 net/core/bpf_sk_storage.c:61) 
[ 18.989639][ C3] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:745) 
[ 18.989643][ C3] __put_net (net/core/net_namespace.c:732) 
[ 18.989648][ C3] __sk_destruct (./include/net/net_namespace.h:288 ./include/net/net_namespace.h:390 net/core/sock.c:2376) 
[ 18.989652][ C3] ? rcu_do_batch (kernel/rcu/tree.c:2576) 
[ 18.989655][ C3] rcu_do_batch (kernel/rcu/tree.c:2576) 
[ 18.989659][ C3] ? __pfx_rcu_do_batch (kernel/rcu/tree.c:2500) 
[ 18.989663][ C3] ? trace_irq_enable.constprop.0 (./include/trace/events/preemptirq.h:40) 
[ 18.989670][ C3] ? _raw_spin_unlock_irqrestore (./arch/x86/include/asm/preempt.h:104 ./include/linux/spinlock_api_smp.h:152 kernel/locking/spinlock.c:194) 
[ 18.989677][ C3] rcu_core (kernel/rcu/tree.c:2834) 
[ 18.989682][ C3] handle_softirqs (kernel/softirq.c:579) 
[ 18.989688][ C3] __irq_exit_rcu (kernel/softirq.c:614 kernel/softirq.c:453 kernel/softirq.c:680) 
[ 18.989691][ C3] irq_exit_rcu (kernel/softirq.c:698) 
[ 18.989694][ C3] sysvec_apic_timer_interrupt (arch/x86/kernel/apic/apic.c:1050 arch/x86/kernel/apic/apic.c:1050) 
[   18.989698][    C3]  </IRQ>
[   18.989699][    C3]  <TASK>
[ 18.989701][ C3] asm_sysvec_apic_timer_interrupt (./arch/x86/include/asm/idtentry.h:702) 
[ 18.989704][ C3] RIP: 0010:pv_native_safe_halt (arch/x86/kernel/paravirt.c:82) 
[ 18.989709][ 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
[   18.989712][    C3] RSP: 0018:ffffc90000157de8 EFLAGS: 00000246
[   18.989716][    C3] RAX: 0000000000000003 RBX: 1ffff9200002afc1 RCX: ffffffff8458f5d9
[   18.989718][    C3] RDX: ffffed1006c366fb RSI: ffffffff84853b60 RDI: ffffffff81d8d18f
[   18.989720][    C3] RBP: 0000000000000000 R08: 0000000000000000 R09: ffffed1006c366fa
[   18.989721][    C3] R10: ffff8880361b37d3 R11: ffff888005188558 R12: 0000000000000000
[   18.989723][    C3] R13: ffff888001bf45c0 R14: dffffc0000000000 R15: 0000000000000000
[ 18.989727][ C3] ? ct_kernel_exit.constprop.0 (kernel/context_tracking.c:146) 
[ 18.989731][ C3] ? cpuidle_idle_call (kernel/sched/idle.c:186) 
[ 18.989735][ C3] default_idle (./arch/x86/include/asm/paravirt.h:107 arch/x86/kernel/process.c:743) 
[ 18.989738][ C3] default_idle_call (./include/linux/cpuidle.h:143 kernel/sched/idle.c:118) 
[ 18.989741][ C3] cpuidle_idle_call (kernel/sched/idle.c:186) 
[ 18.989744][ C3] ? __pfx_cpuidle_idle_call (kernel/sched/idle.c:168) 
[ 18.989748][ C3] ? tsc_verify_tsc_adjust (arch/x86/kernel/tsc_sync.c:60) 
[ 18.989752][ C3] do_idle (kernel/sched/idle.c:325) 
[ 18.989756][ C3] cpu_startup_entry (kernel/sched/idle.c:422 (discriminator 1)) 
[ 18.989759][ C3] start_secondary (arch/x86/kernel/smpboot.c:203 arch/x86/kernel/smpboot.c:283) 
[ 18.989761][ C3] ? __pfx_start_secondary (arch/x86/kernel/smpboot.c:233) 


Finger prints:
copy_fpstate_to_sigframe: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