======================================
| [ 250.316791][ C3] #0: ffff8880016a2410 (&sb->s_type->i_mutex_key#2){++++}-{4:4}, at: start_creating.part.0 (./include/linux/dcache.h:527 fs/debugfs/inode.c:388) 
| [ 250.317268][ C3] #1: ffffffff9238b540 (rcu_callback){....}-{0:0}, at: rcu_do_batch (./include/linux/rcupdate.h:331 kernel/rcu/tree.c:2570) 
| [  250.317685][    C3]
| [  250.317685][    C3] stack backtrace:
[  250.317986][    C3] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[  250.317992][    C3] Call Trace:
[  250.317996][    C3]  <IRQ>
[ 250.317998][ C3] dump_stack_lvl (lib/dump_stack.c:123) 
[ 250.318007][ C3] print_usage_bug.part.0 (kernel/locking/lockdep.c:4048) 
[ 250.318012][ C3] mark_lock_irq (kernel/locking/lockdep.c:4013 kernel/locking/lockdep.c:4059 kernel/locking/lockdep.c:4270) 
[ 250.318015][ C3] ? __kasan_slab_alloc (mm/kasan/common.c:348) 
[ 250.318022][ C3] ? kmem_cache_alloc_noprof (./include/linux/kasan.h:250 mm/slub.c:4147 mm/slub.c:4196 mm/slub.c:4203) 
[ 250.318031][ C3] ? __alloc_object (mm/kmemleak.c:481 mm/kmemleak.c:661) 
[ 250.318036][ C3] ? __create_object (mm/kmemleak.c:770) 
[ 250.318040][ C3] ? kmem_cache_alloc_lru_noprof (./include/linux/kmemleak.h:43 mm/slub.c:4151 mm/slub.c:4196 mm/slub.c:4215) 
[ 250.318043][ C3] ? __d_alloc (fs/dcache.c:1690) 
[ 250.318049][ C3] ? d_alloc (fs/dcache.c:1769) 
[ 250.318053][ C3] ? save_trace (kernel/locking/lockdep.c:595) 
[ 250.318061][ C3] mark_lock (kernel/locking/lockdep.c:4756) 
[ 250.318064][ C3] mark_usage (kernel/locking/lockdep.c:4645) 
[ 250.318067][ C3] __lock_acquire (kernel/locking/lockdep.c:5194) 
[ 250.318072][ C3] lock_acquire.part.0 (kernel/locking/lockdep.c:473 kernel/locking/lockdep.c:5873) 
[ 250.318075][ C3] ? simple_pin_fs (fs/libfs.c:1067) 
[ 250.318078][ C3] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:745) 
[ 250.318081][ C3] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5834) 
[ 250.318084][ C3] ? simple_pin_fs (fs/libfs.c:1067) 
[ 250.318088][ C3] _raw_spin_lock (./include/linux/spinlock_api_smp.h:134 kernel/locking/spinlock.c:154) 
[ 250.318091][ C3] ? simple_pin_fs (fs/libfs.c:1067) 
[ 250.318094][ C3] simple_pin_fs (fs/libfs.c:1067) 
[ 250.318097][ C3] debugfs_remove (fs/debugfs/inode.c:805 fs/debugfs/inode.c:799) 
[ 250.318100][ C3] ref_tracker_dir_exit (lib/ref_tracker.c:412 lib/ref_tracker.c:196) 
[ 250.318108][ C3] ? __pfx_ref_tracker_free (lib/ref_tracker.c:254) 
[ 250.318110][ 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) 
[ 250.318122][ C3] ? rcu_do_batch (./include/linux/rcupdate.h:341 kernel/rcu/tree.c:2578) 
[ 250.318125][ C3] ? __pfx_ref_tracker_dir_exit (lib/ref_tracker.c:190) 
[ 250.318128][ C3] ? irq_exit_rcu (kernel/softirq.c:698) 
[ 250.318130][ C3] ? sysvec_apic_timer_interrupt (arch/x86/kernel/apic/apic.c:1050 arch/x86/kernel/apic/apic.c:1050) 
[ 250.318135][ C3] ? asm_sysvec_apic_timer_interrupt (./arch/x86/include/asm/idtentry.h:702) 
[ 250.318140][ C3] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:745) 
[ 250.318142][ C3] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5834) 
[ 250.318144][ C3] ? unwind_next_frame (./include/linux/rcupdate.h:842 ./include/linux/rcupdate.h:1155 arch/x86/kernel/unwind_orc.c:479) 
[ 250.318148][ C3] ? arch_stack_walk (arch/x86/kernel/stacktrace.c:24) 
[ 250.318153][ C3] ? stack_trace_save (kernel/stacktrace.c:123) 
[ 250.318159][ C3] ? kasan_save_stack (mm/kasan/common.c:48) 
[ 250.318163][ C3] ? kasan_save_track (./arch/x86/include/asm/current.h:25 mm/kasan/common.c:60 mm/kasan/common.c:69) 
[ 250.318166][ C3] ? __kasan_slab_alloc (mm/kasan/common.c:348) 
[ 250.318172][ C3] __put_net (net/core/net_namespace.c:732) 
[ 250.318178][ C3] __sk_destruct (./include/net/net_namespace.h:288 ./include/net/net_namespace.h:390 net/core/sock.c:2376) 
[ 250.318181][ C3] ? rcu_do_batch (kernel/rcu/tree.c:2576) 
[ 250.318185][ C3] rcu_do_batch (./include/linux/rcupdate.h:341 kernel/rcu/tree.c:2578) 
[ 250.318190][ C3] ? find_held_lock (kernel/locking/lockdep.c:5353) 
[ 250.318195][ C3] ? __pfx_rcu_do_batch (kernel/rcu/tree.c:2500) 
[ 250.318199][ C3] ? mark_held_locks (kernel/locking/lockdep.c:4328) 
[ 250.318202][ C3] ? note_gp_changes (kernel/rcu/tree.c:1326 (discriminator 1)) 
[ 250.318205][ C3] ? lockdep_hardirqs_on (kernel/locking/lockdep.c:4475) 
[ 250.318210][ C3] rcu_core (kernel/rcu/tree.c:2834) 
[ 250.318215][ C3] handle_softirqs (kernel/softirq.c:580) 
[ 250.318220][ C3] __irq_exit_rcu (kernel/softirq.c:614 kernel/softirq.c:453 kernel/softirq.c:680) 
[ 250.318223][ C3] irq_exit_rcu (kernel/softirq.c:698) 
[ 250.318225][ C3] sysvec_apic_timer_interrupt (arch/x86/kernel/apic/apic.c:1050 arch/x86/kernel/apic/apic.c:1050) 
[  250.318229][    C3]  </IRQ>
[  250.318230][    C3]  <TASK>
[ 250.318233][ C3] asm_sysvec_apic_timer_interrupt (./arch/x86/include/asm/idtentry.h:702) 
[ 250.318236][ C3] RIP: 0010:rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:745) 
[ 250.318239][ C3] Code: e9 93 89 c5 83 f8 3f 0f 87 82 00 00 00 48 8d 3c ed 20 1e 97 91 48 b8 00 00 00 00 00 fc ff df 48 89 fa 48 c1 ea 03 80 3c 02 00 <75> 5c 48 03 1c ed 20 1e 97 91 48 b8 00 00 00 00 00 fc ff df 48 89
All code
========
   0:	e9 93 89 c5 83       	jmp    0xffffffff83c58998
   5:	f8                   	clc
   6:	3f                   	(bad)
   7:	0f 87 82 00 00 00    	ja     0x8f
   d:	48 8d 3c ed 20 1e 97 	lea    -0x6e68e1e0(,%rbp,8),%rdi
  14:	91 
  15:	48 b8 00 00 00 00 00 	movabs $0xdffffc0000000000,%rax
  1c:	fc ff df 
  1f:	48 89 fa             	mov    %rdi,%rdx
  22:	48 c1 ea 03          	shr    $0x3,%rdx
  26:	80 3c 02 00          	cmpb   $0x0,(%rdx,%rax,1)
  2a:*	75 5c                	jne    0x88		<-- trapping instruction
  2c:	48 03 1c ed 20 1e 97 	add    -0x6e68e1e0(,%rbp,8),%rbx
  33:	91 
  34:	48 b8 00 00 00 00 00 	movabs $0xdffffc0000000000,%rax
  3b:	fc ff df 
  3e:	48                   	rex.W
  3f:	89                   	.byte 0x89

Code starting with the faulting instruction
===========================================
   0:	75 5c                	jne    0x5e
   2:	48 03 1c ed 20 1e 97 	add    -0x6e68e1e0(,%rbp,8),%rbx
   9:	91 
   a:	48 b8 00 00 00 00 00 	movabs $0xdffffc0000000000,%rax
  11:	fc ff df 
  14:	48                   	rex.W
  15:	89                   	.byte 0x89
[  250.318242][    C3] RSP: 0018:ffffc900008071b0 EFLAGS: 00000246
[  250.318245][    C3] RAX: dffffc0000000000 RBX: ffffffff93e927d0 RCX: 0000000000000002
[  250.318247][    C3] RDX: 1ffffffff232e3c7 RSI: ffffffff91056840 RDI: ffffffff91971e38
[  250.318249][    C3] RBP: 0000000000000003 R08: 0000000000000000 R09: 0000000000000000
[  250.318250][    C3] R10: ffffffff8e01d687 R11: ffffc90000807358 R12: 0000000000000000
[  250.318252][    C3] R13: 0000000000000000 R14: 0000000000000002 R15: 0000000000000000
[ 250.318255][ 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) 
[ 250.318260][ C3] lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5834) 
[ 250.318263][ 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) 
[ 250.318266][ C3] unwind_next_frame (./include/linux/rcupdate.h:842 ./include/linux/rcupdate.h:1155 arch/x86/kernel/unwind_orc.c:479) 
[ 250.318268][ 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) 
[ 250.318271][ C3] ? kasan_save_stack (mm/kasan/common.c:48) 
[ 250.318276][ C3] ? __pfx_unwind_next_frame (arch/x86/kernel/unwind_orc.c:469) 
[ 250.318280][ C3] ? kasan_save_stack (mm/kasan/common.c:48) 
[ 250.318282][ C3] ? kernel_text_address (kernel/extable.c:99) 
[ 250.318287][ C3] ? __pfx_stack_trace_consume_entry (kernel/stacktrace.c:83) 
[ 250.318291][ C3] arch_stack_walk (arch/x86/kernel/stacktrace.c:24) 
[ 250.318296][ C3] ? kasan_save_stack (mm/kasan/common.c:48) 
[ 250.318301][ C3] stack_trace_save (kernel/stacktrace.c:123) 
[ 250.318304][ C3] ? __pfx_stack_trace_save (kernel/stacktrace.c:114) 
[ 250.318308][ C3] ? validate_chain (kernel/locking/lockdep.c:3804 kernel/locking/lockdep.c:3824 kernel/locking/lockdep.c:3879) 
[ 250.318312][ C3] kasan_save_stack (mm/kasan/common.c:48) 
[ 250.318315][ C3] ? kasan_save_stack (mm/kasan/common.c:48) 
[ 250.318320][ C3] ? check_bytes_and_report (mm/slub.c:1212) 
[ 250.318324][ C3] ? find_held_lock (kernel/locking/lockdep.c:5353) 
[ 250.318328][ C3] ? mark_held_locks (kernel/locking/lockdep.c:4328) 
[ 250.318331][ C3] ? _raw_spin_unlock_irqrestore (./include/linux/spinlock_api_smp.h:151 kernel/locking/spinlock.c:194) 
[ 250.318334][ C3] ? lockdep_hardirqs_on (kernel/locking/lockdep.c:4475) 
[ 250.318337][ C3] ? _raw_spin_unlock_irqrestore (./arch/x86/include/asm/preempt.h:104 ./include/linux/spinlock_api_smp.h:152 kernel/locking/spinlock.c:194) 
[ 250.318341][ C3] ? get_partial_node.part.0 (mm/slub.c:2902) 
[ 250.318346][ C3] ? ___slab_alloc (mm/slub.c:2863 mm/slub.c:2980 mm/slub.c:3838) 
[ 250.318350][ C3] ? __alloc_object (mm/kmemleak.c:481 mm/kmemleak.c:661) 
[ 250.318356][ C3] kasan_save_track (./arch/x86/include/asm/current.h:25 mm/kasan/common.c:60 mm/kasan/common.c:69) 
[ 250.318359][ C3] __kasan_slab_alloc (mm/kasan/common.c:348) 
[ 250.318363][ C3] kmem_cache_alloc_noprof (./include/linux/kasan.h:250 mm/slub.c:4147 mm/slub.c:4196 mm/slub.c:4203) 
[ 250.318367][ C3] ? __d_alloc (fs/dcache.c:1690) 
[ 250.318371][ C3] __alloc_object (mm/kmemleak.c:481 mm/kmemleak.c:661) 
[ 250.318375][ C3] __create_object (mm/kmemleak.c:770) 
[ 250.318378][ C3] kmem_cache_alloc_lru_noprof (./include/linux/kmemleak.h:43 mm/slub.c:4151 mm/slub.c:4196 mm/slub.c:4215) 
[ 250.318383][ C3] __d_alloc (fs/dcache.c:1690) 
[ 250.318387][ C3] d_alloc (fs/dcache.c:1769) 
[ 250.318392][ C3] d_alloc_parallel (fs/dcache.c:2533) 
[ 250.318398][ C3] ? __pfx_number (lib/vsprintf.c:453) 
[ 250.318404][ C3] ? __pfx_widen_string (lib/vsprintf.c:612) 
[ 250.318407][ C3] ? __pfx_d_alloc_parallel (fs/dcache.c:2529) 
[ 250.318411][ C3] ? lockdep_init_map_type (kernel/locking/lockdep.c:4976) 
[ 250.318414][ C3] ? lockdep_init_map_type (kernel/locking/lockdep.c:4976) 
[ 250.318419][ C3] __lookup_slow (fs/namei.c:1802) 
[ 250.318426][ C3] ? __pfx___lookup_slow (fs/namei.c:1793) 
[ 250.318431][ C3] ? __d_lookup (./include/linux/rcupdate.h:341 ./include/linux/rcupdate.h:871 fs/dcache.c:2397) 
[ 250.318436][ C3] ? lookup_dcache (fs/namei.c:1655) 
[ 250.318441][ C3] start_creating.part.0 (fs/debugfs/inode.c:391) 
[ 250.318446][ C3] __debugfs_create_file (fs/debugfs/inode.c:364 fs/debugfs/inode.c:437) 
[ 250.318451][ C3] debugfs_create_file_full (fs/debugfs/inode.c:474) 
[ 250.318455][ C3] ref_tracker_dir_debugfs.part.0 (lib/ref_tracker.c:382) 
[ 250.318458][ C3] ? __pfx_ref_tracker_dir_debugfs.part.0 (lib/ref_tracker.c:369) 
[ 250.318461][ C3] ? __lock_acquire (kernel/locking/lockdep.c:5240) 
[ 250.318465][ C3] ? find_held_lock (kernel/locking/lockdep.c:5353) 
[ 250.318469][ C3] ? __create_object (mm/kmemleak.c:776) 
[ 250.318471][ C3] ? __lock_release (kernel/locking/lockdep.c:5539) 
[ 250.318474][ C3] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:745) 
[ 250.318477][ C3] ? _raw_spin_unlock_irqrestore (./include/linux/spinlock_api_smp.h:151 kernel/locking/spinlock.c:194) 
[ 250.318480][ C3] ? lockdep_hardirqs_on (kernel/locking/lockdep.c:4475) 
[ 250.318484][ C3] ? lockdep_init_map_type (kernel/locking/lockdep.c:4976) 
[ 250.318487][ C3] ? __raw_spin_lock_init (kernel/locking/spinlock_debug.c:27) 
[ 250.318491][ C3] preinit_net (./include/linux/ref_tracker.h:79 net/core/net_namespace.c:406) 
[ 250.318495][ C3] copy_net_ns (net/core/net_namespace.c:567) 
[ 250.318500][ C3] create_new_namespaces (kernel/nsproxy.c:110) 
[ 250.318508][ C3] unshare_nsproxy_namespaces (kernel/nsproxy.c:218 (discriminator 4)) 
[ 250.318512][ C3] ksys_unshare (kernel/fork.c:3390) 
[ 250.318516][ C3] ? __pfx_ksys_unshare (kernel/fork.c:3341) 
[ 250.318521][ C3] ? 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) 
[ 250.318527][ C3] __x64_sys_unshare (kernel/fork.c:3459) 
[ 250.318530][ C3] do_syscall_64 (arch/x86/entry/syscall_64.c:63 arch/x86/entry/syscall_64.c:94) 
[ 250.318535][ C3] entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:130) 
[  250.318538][    C3] RIP: 0033:0x7f835602693b
[ 250.318541][ C3] Code: 73 01 c3 48 8b 0d c5 94 1b 00 f7 d8 64 89 01 48 83 c8 ff c3 66 2e 0f 1f 84 00 00 00 00 00 90 f3 0f 1e fa b8 10 01 00 00 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 8b 0d 95 94 1b 00 f7 d8 64 89 01 48
All code
========
   0:	73 01                	jae    0x3
   2:	c3                   	ret
   3:	48 8b 0d c5 94 1b 00 	mov    0x1b94c5(%rip),%rcx        # 0x1b94cf
   a:	f7 d8                	neg    %eax
   c:	64 89 01             	mov    %eax,%fs:(%rcx)
   f:	48 83 c8 ff          	or     $0xffffffffffffffff,%rax
  13:	c3                   	ret
  14:	66 2e 0f 1f 84 00 00 	cs nopw 0x0(%rax,%rax,1)
  1b:	00 00 00 
  1e:	90                   	nop
  1f:	f3 0f 1e fa          	endbr64
  23:	b8 10 01 00 00       	mov    $0x110,%eax
  28:	0f 05                	syscall
  2a:*	48 3d 01 f0 ff ff    	cmp    $0xfffffffffffff001,%rax		<-- trapping instruction
  30:	73 01                	jae    0x33
  32:	c3                   	ret
  33:	48 8b 0d 95 94 1b 00 	mov    0x1b9495(%rip),%rcx        # 0x1b94cf
  3a:	f7 d8                	neg    %eax
  3c:	64 89 01             	mov    %eax,%fs:(%rcx)
  3f:	48                   	rex.W

Code starting with the faulting instruction
===========================================
   0:	48 3d 01 f0 ff ff    	cmp    $0xfffffffffffff001,%rax
   6:	73 01                	jae    0x9
   8:	c3                   	ret
   9:	48 8b 0d 95 94 1b 00 	mov    0x1b9495(%rip),%rcx        # 0x1b94a5
  10:	f7 d8                	neg    %eax
  12:	64 89 01             	mov    %eax,%fs:(%rcx)
  15:	48                   	rex.W
[  250.318544][    C3] RSP: 002b:00007ffe69e64558 EFLAGS: 00000202 ORIG_RAX: 0000000000000110
[  250.318547][    C3] RAX: ffffffffffffffda RBX: 00007ffe69e64590 RCX: 00007f835602693b
[  250.318548][    C3] RDX: 0000000000000000 RSI: 00007ffe69e64590 RDI: 0000000040000000
[  250.318550][    C3] RBP: 00007f8355fe2000 R08: 0000000000000000 R09: 0000000000000000
[  250.318552][    C3] R10: 00007f8355ffbf18 R11: 0000000000000202 R12: 0000000000000001
[  250.318553][    C3] R13: 00007ffe69e64590 R14: 00007f8355fe2000 R15: 00000000004082a0
| [  250.355811][    C3] RCU nest depth: 1, expected: 0
| [  250.356043][    C3] INFO: lockdep is turned off.
| [  250.356268][    C3] Preemption disabled at:
| [ 250.356270][ C3] __slab_alloc.constprop.0 (mm/slub.c:3945) 
[  250.356730][    C3] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[  250.356732][    C3] Call Trace:
[  250.356734][    C3]  <IRQ>
[ 250.356735][ C3] dump_stack_lvl (lib/dump_stack.c:123) 
[ 250.356744][ C3] __might_resched (kernel/sched/core.c:8796) 
[ 250.356752][ C3] down_write (./include/linux/kernel.h:73 kernel/locking/rwsem.c:1576) 
[ 250.356756][ C3] ? __pfx_down_write (kernel/locking/rwsem.c:1575) 
[ 250.356759][ C3] ? simple_recursive_removal (fs/libfs.c:614) 
[ 250.356764][ C3] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:745) 
[ 250.356769][ 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) 
[ 250.356775][ C3] simple_recursive_removal (./include/linux/dcache.h:409 ./include/linux/dcache.h:424 ./include/linux/dcache.h:434 fs/libfs.c:617) 
[ 250.356778][ 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) 
[ 250.356781][ C3] ? __pfx_remove_one (fs/debugfs/inode.c:780) 
[ 250.356789][ C3] debugfs_remove (fs/debugfs/inode.c:806 fs/debugfs/inode.c:799) 
[ 250.356792][ C3] ref_tracker_dir_exit (lib/ref_tracker.c:412 lib/ref_tracker.c:196) 
[ 250.356798][ C3] ? __pfx_ref_tracker_free (lib/ref_tracker.c:254) 
[ 250.356801][ 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) 
[ 250.356806][ C3] ? rcu_do_batch (./include/linux/rcupdate.h:341 kernel/rcu/tree.c:2578) 
[ 250.356811][ C3] ? __pfx_ref_tracker_dir_exit (lib/ref_tracker.c:190) 
[ 250.356814][ C3] ? irq_exit_rcu (kernel/softirq.c:698) 
[ 250.356819][ C3] ? sysvec_apic_timer_interrupt (arch/x86/kernel/apic/apic.c:1050 arch/x86/kernel/apic/apic.c:1050) 
[ 250.356825][ C3] ? asm_sysvec_apic_timer_interrupt (./arch/x86/include/asm/idtentry.h:702) 
[ 250.356829][ C3] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:745) 
[ 250.356832][ C3] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5834) 
[ 250.356834][ C3] ? unwind_next_frame (./include/linux/rcupdate.h:842 ./include/linux/rcupdate.h:1155 arch/x86/kernel/unwind_orc.c:479) 
[ 250.356838][ C3] ? arch_stack_walk (arch/x86/kernel/stacktrace.c:24) 
[ 250.356843][ C3] ? stack_trace_save (kernel/stacktrace.c:123) 
[ 250.356849][ C3] ? kasan_save_stack (mm/kasan/common.c:48) 
[ 250.356855][ C3] ? kasan_save_track (./arch/x86/include/asm/current.h:25 mm/kasan/common.c:60 mm/kasan/common.c:69) 
[ 250.356859][ C3] ? __kasan_slab_alloc (mm/kasan/common.c:348) 
[ 250.356865][ C3] __put_net (net/core/net_namespace.c:732) 
[ 250.356871][ C3] __sk_destruct (./include/net/net_namespace.h:288 ./include/net/net_namespace.h:390 net/core/sock.c:2376) 
[ 250.356874][ C3] ? rcu_do_batch (kernel/rcu/tree.c:2576) 
[ 250.356878][ C3] rcu_do_batch (./include/linux/rcupdate.h:341 kernel/rcu/tree.c:2578) 
[ 250.356882][ C3] ? find_held_lock (kernel/locking/lockdep.c:5353) 
[ 250.356888][ C3] ? __pfx_rcu_do_batch (kernel/rcu/tree.c:2500) 
[ 250.356893][ C3] ? mark_held_locks (kernel/locking/lockdep.c:4328) 
[ 250.356895][ C3] ? note_gp_changes (kernel/rcu/tree.c:1326 (discriminator 1)) 
[ 250.356898][ C3] ? lockdep_hardirqs_on (kernel/locking/lockdep.c:4475) 
[ 250.356903][ C3] rcu_core (kernel/rcu/tree.c:2834) 
[ 250.356907][ C3] handle_softirqs (kernel/softirq.c:580) 
[ 250.356913][ C3] __irq_exit_rcu (kernel/softirq.c:614 kernel/softirq.c:453 kernel/softirq.c:680) 
[ 250.356916][ C3] irq_exit_rcu (kernel/softirq.c:698) 
[ 250.356918][ C3] sysvec_apic_timer_interrupt (arch/x86/kernel/apic/apic.c:1050 arch/x86/kernel/apic/apic.c:1050) 
[  250.356921][    C3]  </IRQ>
[  250.356922][    C3]  <TASK>
[ 250.356924][ C3] asm_sysvec_apic_timer_interrupt (./arch/x86/include/asm/idtentry.h:702) 
[ 250.356927][ C3] RIP: 0010:rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:745) 
[ 250.356930][ C3] Code: e9 93 89 c5 83 f8 3f 0f 87 82 00 00 00 48 8d 3c ed 20 1e 97 91 48 b8 00 00 00 00 00 fc ff df 48 89 fa 48 c1 ea 03 80 3c 02 00 <75> 5c 48 03 1c ed 20 1e 97 91 48 b8 00 00 00 00 00 fc ff df 48 89
All code
========
   0:	e9 93 89 c5 83       	jmp    0xffffffff83c58998
   5:	f8                   	clc
   6:	3f                   	(bad)
   7:	0f 87 82 00 00 00    	ja     0x8f
   d:	48 8d 3c ed 20 1e 97 	lea    -0x6e68e1e0(,%rbp,8),%rdi
  14:	91 
  15:	48 b8 00 00 00 00 00 	movabs $0xdffffc0000000000,%rax
  1c:	fc ff df 
  1f:	48 89 fa             	mov    %rdi,%rdx
  22:	48 c1 ea 03          	shr    $0x3,%rdx
  26:	80 3c 02 00          	cmpb   $0x0,(%rdx,%rax,1)
  2a:*	75 5c                	jne    0x88		<-- trapping instruction
  2c:	48 03 1c ed 20 1e 97 	add    -0x6e68e1e0(,%rbp,8),%rbx
  33:	91 
  34:	48 b8 00 00 00 00 00 	movabs $0xdffffc0000000000,%rax
  3b:	fc ff df 
  3e:	48                   	rex.W
  3f:	89                   	.byte 0x89

Code starting with the faulting instruction
===========================================
   0:	75 5c                	jne    0x5e
   2:	48 03 1c ed 20 1e 97 	add    -0x6e68e1e0(,%rbp,8),%rbx
   9:	91 
   a:	48 b8 00 00 00 00 00 	movabs $0xdffffc0000000000,%rax
  11:	fc ff df 
  14:	48                   	rex.W
  15:	89                   	.byte 0x89
[  250.356932][    C3] RSP: 0018:ffffc900008071b0 EFLAGS: 00000246
[  250.356935][    C3] RAX: dffffc0000000000 RBX: ffffffff93e927d0 RCX: 0000000000000002
[  250.356937][    C3] RDX: 1ffffffff232e3c7 RSI: ffffffff91056840 RDI: ffffffff91971e38
[  250.356939][    C3] RBP: 0000000000000003 R08: 0000000000000000 R09: 0000000000000000
[  250.356940][    C3] R10: ffffffff8e01d687 R11: ffffc90000807358 R12: 0000000000000000
[  250.356942][    C3] R13: 0000000000000000 R14: 0000000000000002 R15: 0000000000000000
[ 250.356945][ 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) 
[ 250.356950][ C3] lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5834) 
[ 250.356952][ 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) 
[ 250.356956][ C3] unwind_next_frame (./include/linux/rcupdate.h:842 ./include/linux/rcupdate.h:1155 arch/x86/kernel/unwind_orc.c:479) 
[ 250.356958][ 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) 
[ 250.356961][ C3] ? kasan_save_stack (mm/kasan/common.c:48) 
[ 250.356965][ C3] ? __pfx_unwind_next_frame (arch/x86/kernel/unwind_orc.c:469) 
[ 250.356969][ C3] ? kasan_save_stack (mm/kasan/common.c:48) 
[ 250.356972][ C3] ? kernel_text_address (kernel/extable.c:99) 
[ 250.356977][ C3] ? __pfx_stack_trace_consume_entry (kernel/stacktrace.c:83) 
[ 250.356981][ C3] arch_stack_walk (arch/x86/kernel/stacktrace.c:24) 
[ 250.356986][ C3] ? kasan_save_stack (mm/kasan/common.c:48) 
[ 250.356991][ C3] stack_trace_save (kernel/stacktrace.c:123) 
[ 250.356994][ C3] ? __pfx_stack_trace_save (kernel/stacktrace.c:114) 
[ 250.356998][ C3] ? validate_chain (kernel/locking/lockdep.c:3804 kernel/locking/lockdep.c:3824 kernel/locking/lockdep.c:3879) 
[ 250.357002][ C3] kasan_save_stack (mm/kasan/common.c:48) 
[ 250.357005][ C3] ? kasan_save_stack (mm/kasan/common.c:48) 
[ 250.357010][ C3] ? check_bytes_and_report (mm/slub.c:1212) 
[ 250.357013][ C3] ? find_held_lock (kernel/locking/lockdep.c:5353) 
[ 250.357018][ C3] ? mark_held_locks (kernel/locking/lockdep.c:4328) 
[ 250.357021][ C3] ? _raw_spin_unlock_irqrestore (./include/linux/spinlock_api_smp.h:151 kernel/locking/spinlock.c:194) 
[ 250.357025][ C3] ? lockdep_hardirqs_on (kernel/locking/lockdep.c:4475) 
[ 250.357028][ C3] ? _raw_spin_unlock_irqrestore (./arch/x86/include/asm/preempt.h:104 ./include/linux/spinlock_api_smp.h:152 kernel/locking/spinlock.c:194) 
[ 250.357031][ C3] ? get_partial_node.part.0 (mm/slub.c:2902) 
[ 250.357037][ C3] ? ___slab_alloc (mm/slub.c:2863 mm/slub.c:2980 mm/slub.c:3838) 
[ 250.357040][ C3] ? __alloc_object (mm/kmemleak.c:481 mm/kmemleak.c:661) 
[ 250.357047][ C3] kasan_save_track (./arch/x86/include/asm/current.h:25 mm/kasan/common.c:60 mm/kasan/common.c:69) 
[ 250.357050][ C3] __kasan_slab_alloc (mm/kasan/common.c:348) 
[ 250.357054][ C3] kmem_cache_alloc_noprof (./include/linux/kasan.h:250 mm/slub.c:4147 mm/slub.c:4196 mm/slub.c:4203) 
[ 250.357058][ C3] ? __d_alloc (fs/dcache.c:1690) 
[ 250.357064][ C3] __alloc_object (mm/kmemleak.c:481 mm/kmemleak.c:661) 
[ 250.357068][ C3] __create_object (mm/kmemleak.c:770) 
[ 250.357072][ C3] kmem_cache_alloc_lru_noprof (./include/linux/kmemleak.h:43 mm/slub.c:4151 mm/slub.c:4196 mm/slub.c:4215) 
[ 250.357077][ C3] __d_alloc (fs/dcache.c:1690) 
[ 250.357082][ C3] d_alloc (fs/dcache.c:1769) 
[ 250.357086][ C3] d_alloc_parallel (fs/dcache.c:2533) 
[ 250.357091][ C3] ? __pfx_number (lib/vsprintf.c:453) 
[ 250.357095][ C3] ? __pfx_widen_string (lib/vsprintf.c:612) 
[ 250.357099][ C3] ? __pfx_d_alloc_parallel (fs/dcache.c:2529) 
[ 250.357102][ C3] ? lockdep_init_map_type (kernel/locking/lockdep.c:4976) 
[ 250.357106][ C3] ? lockdep_init_map_type (kernel/locking/lockdep.c:4976) 
[ 250.357110][ C3] __lookup_slow (fs/namei.c:1802) 
[ 250.357115][ C3] ? __pfx___lookup_slow (fs/namei.c:1793) 
[ 250.357121][ C3] ? __d_lookup (./include/linux/rcupdate.h:341 ./include/linux/rcupdate.h:871 fs/dcache.c:2397) 
[ 250.357126][ C3] ? lookup_dcache (fs/namei.c:1655) 
[ 250.357131][ C3] start_creating.part.0 (fs/debugfs/inode.c:391) 
[ 250.357136][ C3] __debugfs_create_file (fs/debugfs/inode.c:364 fs/debugfs/inode.c:437) 
[ 250.357141][ C3] debugfs_create_file_full (fs/debugfs/inode.c:474) 
[ 250.357144][ C3] ref_tracker_dir_debugfs.part.0 (lib/ref_tracker.c:382) 
[ 250.357148][ C3] ? __pfx_ref_tracker_dir_debugfs.part.0 (lib/ref_tracker.c:369) 
[ 250.357151][ C3] ? __lock_acquire (kernel/locking/lockdep.c:5240) 
[ 250.357155][ C3] ? find_held_lock (kernel/locking/lockdep.c:5353) 
[ 250.357159][ C3] ? __create_object (mm/kmemleak.c:776) 
[ 250.357161][ C3] ? __lock_release (kernel/locking/lockdep.c:5539) 
[ 250.357164][ C3] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:745) 
[ 250.357166][ C3] ? _raw_spin_unlock_irqrestore (./include/linux/spinlock_api_smp.h:151 kernel/locking/spinlock.c:194) 
[ 250.357170][ C3] ? lockdep_hardirqs_on (kernel/locking/lockdep.c:4475) 
[ 250.357174][ C3] ? lockdep_init_map_type (kernel/locking/lockdep.c:4976) 
[ 250.357177][ C3] ? __raw_spin_lock_init (kernel/locking/spinlock_debug.c:27) 
[ 250.357181][ C3] preinit_net (./include/linux/ref_tracker.h:79 net/core/net_namespace.c:406) 
[ 250.357184][ C3] copy_net_ns (net/core/net_namespace.c:567) 
[ 250.357189][ C3] create_new_namespaces (kernel/nsproxy.c:110) 
[ 250.357196][ C3] unshare_nsproxy_namespaces (kernel/nsproxy.c:218 (discriminator 4)) 
[ 250.357200][ C3] ksys_unshare (kernel/fork.c:3390) 
[ 250.357204][ C3] ? __pfx_ksys_unshare (kernel/fork.c:3341) 
[ 250.357209][ C3] ? 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) 
[ 250.357215][ C3] __x64_sys_unshare (kernel/fork.c:3459) 
[ 250.357218][ C3] do_syscall_64 (arch/x86/entry/syscall_64.c:63 arch/x86/entry/syscall_64.c:94) 
[ 250.357223][ C3] entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:130) 
[  250.357225][    C3] RIP: 0033:0x7f835602693b
[ 250.357228][ C3] Code: 73 01 c3 48 8b 0d c5 94 1b 00 f7 d8 64 89 01 48 83 c8 ff c3 66 2e 0f 1f 84 00 00 00 00 00 90 f3 0f 1e fa b8 10 01 00 00 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 8b 0d 95 94 1b 00 f7 d8 64 89 01 48
All code
========
   0:	73 01                	jae    0x3
   2:	c3                   	ret
   3:	48 8b 0d c5 94 1b 00 	mov    0x1b94c5(%rip),%rcx        # 0x1b94cf
   a:	f7 d8                	neg    %eax
   c:	64 89 01             	mov    %eax,%fs:(%rcx)
   f:	48 83 c8 ff          	or     $0xffffffffffffffff,%rax
  13:	c3                   	ret
  14:	66 2e 0f 1f 84 00 00 	cs nopw 0x0(%rax,%rax,1)
  1b:	00 00 00 
  1e:	90                   	nop
  1f:	f3 0f 1e fa          	endbr64
  23:	b8 10 01 00 00       	mov    $0x110,%eax
  28:	0f 05                	syscall
  2a:*	48 3d 01 f0 ff ff    	cmp    $0xfffffffffffff001,%rax		<-- trapping instruction
  30:	73 01                	jae    0x33
  32:	c3                   	ret
  33:	48 8b 0d 95 94 1b 00 	mov    0x1b9495(%rip),%rcx        # 0x1b94cf
  3a:	f7 d8                	neg    %eax
  3c:	64 89 01             	mov    %eax,%fs:(%rcx)
  3f:	48                   	rex.W

Code starting with the faulting instruction
===========================================
   0:	48 3d 01 f0 ff ff    	cmp    $0xfffffffffffff001,%rax
   6:	73 01                	jae    0x9
   8:	c3                   	ret
   9:	48 8b 0d 95 94 1b 00 	mov    0x1b9495(%rip),%rcx        # 0x1b94a5
  10:	f7 d8                	neg    %eax
  12:	64 89 01             	mov    %eax,%fs:(%rcx)
  15:	48                   	rex.W
[  250.357230][    C3] RSP: 002b:00007ffe69e64558 EFLAGS: 00000202 ORIG_RAX: 0000000000000110
[  250.357233][    C3] RAX: ffffffffffffffda RBX: 00007ffe69e64590 RCX: 00007f835602693b
[  250.357234][    C3] RDX: 0000000000000000 RSI: 00007ffe69e64590 RDI: 0000000040000000
[  250.357236][    C3] RBP: 00007f8355fe2000 R08: 0000000000000000 R09: 0000000000000000
[  250.357237][    C3] R10: 00007f8355ffbf18 R11: 0000000000000202 R12: 0000000000000001
[  250.357239][    C3] R13: 00007ffe69e64590 R14: 00007f8355fe2000 R15: 00000000004082a0
| [  250.425096][    C3] Modules linked in: cls_matchall ip6_gre gre vxlan act_mirred act_tunnel_key cls_flower bareudp mpls_gso mpls_iptunnel mpls_router cls_bpf sch_ingress
| [  250.425760][    C3] Preemption disabled at:
| [ 250.425762][ C3] __slab_alloc.constprop.0 (mm/slub.c:3945) 
| [  250.426237][    C3] Tainted: [W]=WARN
[  250.426238][    C3] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[  250.426240][    C3] Call Trace:
[  250.426241][    C3]  <IRQ>
[ 250.426243][ C3] dump_stack_lvl (lib/dump_stack.c:123) 
[ 250.426249][ C3] ? __slab_alloc.constprop.0 (mm/slub.c:3945) 
[ 250.426252][ C3] __schedule_bug (kernel/sched/core.c:5949) 
[ 250.426257][ C3] schedule_debug (./arch/x86/include/asm/preempt.h:34 kernel/sched/core.c:5976) 
[ 250.426261][ C3] __schedule (./arch/x86/include/asm/jump_label.h:36 ./include/linux/jump_label.h:208 kernel/sched/features.h:66 kernel/sched/core.c:6680) 
[ 250.426267][ C3] ? __pfx_osq_unlock (kernel/locking/osq_lock.c:211) 
[ 250.426272][ C3] ? __pfx___schedule (kernel/sched/core.c:6658) 
[ 250.426276][ C3] ? rwsem_spin_on_owner (./arch/x86/include/asm/atomic64_64.h:15 ./include/linux/atomic/atomic-arch-fallback.h:2583 ./include/linux/atomic/atomic-long.h:38 ./include/linux/atomic/atomic-instrumented.h:3189 kernel/locking/rwsem.c:282 kernel/locking/rwsem.c:765) 
[ 250.426282][ C3] ? rwsem_try_write_lock (./arch/x86/include/asm/atomic64_64.h:15 (discriminator 9) ./include/linux/atomic/atomic-arch-fallback.h:2583 (discriminator 9) ./include/linux/atomic/atomic-long.h:38 (discriminator 9) ./include/linux/atomic/atomic-instrumented.h:3189 (discriminator 9) kernel/locking/rwsem.c:610 (discriminator 9)) 
[ 250.426285][ C3] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:745) 
[ 250.426289][ C3] ? schedule (kernel/sched/core.c:6840 kernel/sched/core.c:6873) 
[ 250.426292][ C3] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:745) 
[ 250.426296][ C3] schedule (kernel/sched/core.c:6860 kernel/sched/core.c:6874) 
[ 250.426299][ C3] schedule_preempt_disabled (kernel/sched/core.c:6932) 
[ 250.426303][ C3] rwsem_down_write_slowpath (kernel/locking/rwsem.c:1178) 
[ 250.426307][ C3] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:745) 
[ 250.426309][ C3] ? __pfx_rwsem_down_write_slowpath (kernel/locking/rwsem.c:1106) 
[ 250.426314][ C3] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:745) 
[ 250.426317][ C3] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5834) 
[ 250.426320][ C3] ? simple_recursive_removal (./include/linux/dcache.h:508 ./include/linux/dcache.h:513 fs/libfs.c:629) 
[ 250.426324][ C3] ? __might_resched (kernel/sched/core.c:8757 (discriminator 11)) 
[ 250.426328][ C3] down_write (./include/linux/err.h:70 kernel/locking/rwsem.c:1304 kernel/locking/rwsem.c:1313 kernel/locking/rwsem.c:1578) 
[ 250.426331][ C3] ? __pfx_down_write (kernel/locking/rwsem.c:1575) 
[ 250.426334][ C3] ? __up_write (./arch/x86/include/asm/preempt.h:104 kernel/locking/rwsem.c:1375) 
[ 250.426336][ C3] ? trace_lock_release (./include/trace/events/lock.h:69 (discriminator 21)) 
[ 250.426341][ C3] simple_recursive_removal (./include/linux/dcache.h:508 ./include/linux/dcache.h:513 fs/libfs.c:629) 
[ 250.426344][ 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) 
[ 250.426347][ C3] ? __pfx_remove_one (fs/debugfs/inode.c:780) 
[ 250.426353][ C3] debugfs_remove (fs/debugfs/inode.c:806 fs/debugfs/inode.c:799) 
[ 250.426356][ C3] ref_tracker_dir_exit (lib/ref_tracker.c:412 lib/ref_tracker.c:196) 
[ 250.426361][ C3] ? __pfx_ref_tracker_free (lib/ref_tracker.c:254) 
[ 250.426363][ 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) 
[ 250.426367][ C3] ? rcu_do_batch (./include/linux/rcupdate.h:341 kernel/rcu/tree.c:2578) 
[ 250.426372][ C3] ? __pfx_ref_tracker_dir_exit (lib/ref_tracker.c:190) 
[ 250.426374][ C3] ? irq_exit_rcu (kernel/softirq.c:698) 
[ 250.426378][ C3] ? sysvec_apic_timer_interrupt (arch/x86/kernel/apic/apic.c:1050 arch/x86/kernel/apic/apic.c:1050) 
[ 250.426382][ C3] ? asm_sysvec_apic_timer_interrupt (./arch/x86/include/asm/idtentry.h:702) 
[ 250.426386][ C3] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:745) 
[ 250.426388][ C3] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5834) 
[ 250.426391][ C3] ? unwind_next_frame (./include/linux/rcupdate.h:842 ./include/linux/rcupdate.h:1155 arch/x86/kernel/unwind_orc.c:479) 
[ 250.426395][ C3] ? arch_stack_walk (arch/x86/kernel/stacktrace.c:24) 
[ 250.426399][ C3] ? stack_trace_save (kernel/stacktrace.c:123) 
[ 250.426405][ C3] ? kasan_save_stack (mm/kasan/common.c:48) 
[ 250.426411][ C3] ? kasan_save_track (./arch/x86/include/asm/current.h:25 mm/kasan/common.c:60 mm/kasan/common.c:69) 
[ 250.426414][ C3] ? __kasan_slab_alloc (mm/kasan/common.c:348) 
[ 250.426419][ C3] __put_net (net/core/net_namespace.c:732) 
[ 250.426424][ C3] __sk_destruct (./include/net/net_namespace.h:288 ./include/net/net_namespace.h:390 net/core/sock.c:2376) 
[ 250.426427][ C3] ? rcu_do_batch (kernel/rcu/tree.c:2576) 
[ 250.426431][ C3] rcu_do_batch (./include/linux/rcupdate.h:341 kernel/rcu/tree.c:2578) 
[ 250.426435][ C3] ? find_held_lock (kernel/locking/lockdep.c:5353) 
[ 250.426439][ C3] ? __pfx_rcu_do_batch (kernel/rcu/tree.c:2500) 
[ 250.426443][ C3] ? mark_held_locks (kernel/locking/lockdep.c:4328) 
[ 250.426446][ C3] ? note_gp_changes (kernel/rcu/tree.c:1326 (discriminator 1)) 
[ 250.426448][ C3] ? lockdep_hardirqs_on (kernel/locking/lockdep.c:4475) 
[ 250.426453][ C3] rcu_core (kernel/rcu/tree.c:2834) 
[ 250.426457][ C3] handle_softirqs (kernel/softirq.c:580) 
[ 250.426462][ C3] __irq_exit_rcu (kernel/softirq.c:614 kernel/softirq.c:453 kernel/softirq.c:680) 
[ 250.426464][ C3] irq_exit_rcu (kernel/softirq.c:698) 
[ 250.426467][ C3] sysvec_apic_timer_interrupt (arch/x86/kernel/apic/apic.c:1050 arch/x86/kernel/apic/apic.c:1050) 
[  250.426470][    C3]  </IRQ>
[  250.426471][    C3]  <TASK>
[ 250.426473][ C3] asm_sysvec_apic_timer_interrupt (./arch/x86/include/asm/idtentry.h:702) 
[ 250.426476][ C3] RIP: 0010:rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:745) 
[ 250.426479][ C3] Code: e9 93 89 c5 83 f8 3f 0f 87 82 00 00 00 48 8d 3c ed 20 1e 97 91 48 b8 00 00 00 00 00 fc ff df 48 89 fa 48 c1 ea 03 80 3c 02 00 <75> 5c 48 03 1c ed 20 1e 97 91 48 b8 00 00 00 00 00 fc ff df 48 89
All code
========
   0:	e9 93 89 c5 83       	jmp    0xffffffff83c58998
   5:	f8                   	clc
   6:	3f                   	(bad)
   7:	0f 87 82 00 00 00    	ja     0x8f
   d:	48 8d 3c ed 20 1e 97 	lea    -0x6e68e1e0(,%rbp,8),%rdi
  14:	91 
  15:	48 b8 00 00 00 00 00 	movabs $0xdffffc0000000000,%rax
  1c:	fc ff df 
  1f:	48 89 fa             	mov    %rdi,%rdx
  22:	48 c1 ea 03          	shr    $0x3,%rdx
  26:	80 3c 02 00          	cmpb   $0x0,(%rdx,%rax,1)
  2a:*	75 5c                	jne    0x88		<-- trapping instruction
  2c:	48 03 1c ed 20 1e 97 	add    -0x6e68e1e0(,%rbp,8),%rbx
  33:	91 
  34:	48 b8 00 00 00 00 00 	movabs $0xdffffc0000000000,%rax
  3b:	fc ff df 
  3e:	48                   	rex.W
  3f:	89                   	.byte 0x89

Code starting with the faulting instruction
===========================================
   0:	75 5c                	jne    0x5e
   2:	48 03 1c ed 20 1e 97 	add    -0x6e68e1e0(,%rbp,8),%rbx
   9:	91 
   a:	48 b8 00 00 00 00 00 	movabs $0xdffffc0000000000,%rax
  11:	fc ff df 
  14:	48                   	rex.W
  15:	89                   	.byte 0x89
[  250.426481][    C3] RSP: 0018:ffffc900008071b0 EFLAGS: 00000246
[  250.426483][    C3] RAX: dffffc0000000000 RBX: ffffffff93e927d0 RCX: 0000000000000002
[  250.426486][    C3] RDX: 1ffffffff232e3c7 RSI: ffffffff91056840 RDI: ffffffff91971e38
[  250.426488][    C3] RBP: 0000000000000003 R08: 0000000000000000 R09: 0000000000000000
[  250.426490][    C3] R10: ffffffff8e01d687 R11: ffffc90000807358 R12: 0000000000000000
[  250.426491][    C3] R13: 0000000000000000 R14: 0000000000000002 R15: 0000000000000000
[ 250.426494][ 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) 
[ 250.426499][ C3] lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5834) 
[ 250.426502][ 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) 
[ 250.426506][ C3] unwind_next_frame (./include/linux/rcupdate.h:842 ./include/linux/rcupdate.h:1155 arch/x86/kernel/unwind_orc.c:479) 
[ 250.426508][ 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) 
[ 250.426510][ C3] ? kasan_save_stack (mm/kasan/common.c:48) 
[ 250.426515][ C3] ? __pfx_unwind_next_frame (arch/x86/kernel/unwind_orc.c:469) 
[ 250.426519][ C3] ? kasan_save_stack (mm/kasan/common.c:48) 
[ 250.426522][ C3] ? kernel_text_address (kernel/extable.c:99) 
[ 250.426526][ C3] ? __pfx_stack_trace_consume_entry (kernel/stacktrace.c:83) 
[ 250.426530][ C3] arch_stack_walk (arch/x86/kernel/stacktrace.c:24) 
[ 250.426535][ C3] ? kasan_save_stack (mm/kasan/common.c:48) 
[ 250.426540][ C3] stack_trace_save (kernel/stacktrace.c:123) 
[ 250.426543][ C3] ? __pfx_stack_trace_save (kernel/stacktrace.c:114) 
[ 250.426547][ C3] ? validate_chain (kernel/locking/lockdep.c:3804 kernel/locking/lockdep.c:3824 kernel/locking/lockdep.c:3879) 
[ 250.426551][ C3] kasan_save_stack (mm/kasan/common.c:48) 
[ 250.426554][ C3] ? kasan_save_stack (mm/kasan/common.c:48) 
[ 250.426559][ C3] ? check_bytes_and_report (mm/slub.c:1212) 
[ 250.426562][ C3] ? find_held_lock (kernel/locking/lockdep.c:5353) 
[ 250.426567][ C3] ? mark_held_locks (kernel/locking/lockdep.c:4328) 
[ 250.426569][ C3] ? _raw_spin_unlock_irqrestore (./include/linux/spinlock_api_smp.h:151 kernel/locking/spinlock.c:194) 
[ 250.426573][ C3] ? lockdep_hardirqs_on (kernel/locking/lockdep.c:4475) 
[ 250.426576][ C3] ? _raw_spin_unlock_irqrestore (./arch/x86/include/asm/preempt.h:104 ./include/linux/spinlock_api_smp.h:152 kernel/locking/spinlock.c:194) 
[ 250.426579][ C3] ? get_partial_node.part.0 (mm/slub.c:2902) 
[ 250.426584][ C3] ? ___slab_alloc (mm/slub.c:2863 mm/slub.c:2980 mm/slub.c:3838) 
[ 250.426588][ C3] ? __alloc_object (mm/kmemleak.c:481 mm/kmemleak.c:661) 
[ 250.426595][ C3] kasan_save_track (./arch/x86/include/asm/current.h:25 mm/kasan/common.c:60 mm/kasan/common.c:69) 
[ 250.426598][ C3] __kasan_slab_alloc (mm/kasan/common.c:348) 
[ 250.426602][ C3] kmem_cache_alloc_noprof (./include/linux/kasan.h:250 mm/slub.c:4147 mm/slub.c:4196 mm/slub.c:4203) 
[ 250.426606][ C3] ? __d_alloc (fs/dcache.c:1690) 
[ 250.426611][ C3] __alloc_object (mm/kmemleak.c:481 mm/kmemleak.c:661) 
[ 250.426615][ C3] __create_object (mm/kmemleak.c:770) 
[ 250.426619][ C3] kmem_cache_alloc_lru_noprof (./include/linux/kmemleak.h:43 mm/slub.c:4151 mm/slub.c:4196 mm/slub.c:4215) 
[ 250.426624][ C3] __d_alloc (fs/dcache.c:1690) 
[ 250.426628][ C3] d_alloc (fs/dcache.c:1769) 
[ 250.426632][ C3] d_alloc_parallel (fs/dcache.c:2533) 
[ 250.426636][ C3] ? __pfx_number (lib/vsprintf.c:453) 
[ 250.426641][ C3] ? __pfx_widen_string (lib/vsprintf.c:612) 
[ 250.426643][ C3] ? __pfx_d_alloc_parallel (fs/dcache.c:2529) 
[ 250.426647][ C3] ? lockdep_init_map_type (kernel/locking/lockdep.c:4976) 
[ 250.426650][ C3] ? lockdep_init_map_type (kernel/locking/lockdep.c:4976) 
[ 250.426655][ C3] __lookup_slow (fs/namei.c:1802) 
[ 250.426659][ C3] ? __pfx___lookup_slow (fs/namei.c:1793) 
[ 250.426664][ C3] ? __d_lookup (./include/linux/rcupdate.h:341 ./include/linux/rcupdate.h:871 fs/dcache.c:2397) 
[ 250.426670][ C3] ? lookup_dcache (fs/namei.c:1655) 
[ 250.426675][ C3] start_creating.part.0 (fs/debugfs/inode.c:391) 
[ 250.426679][ C3] __debugfs_create_file (fs/debugfs/inode.c:364 fs/debugfs/inode.c:437) 
[ 250.426684][ C3] debugfs_create_file_full (fs/debugfs/inode.c:474) 
[ 250.426687][ C3] ref_tracker_dir_debugfs.part.0 (lib/ref_tracker.c:382) 
[ 250.426691][ C3] ? __pfx_ref_tracker_dir_debugfs.part.0 (lib/ref_tracker.c:369) 
[ 250.426694][ C3] ? __lock_acquire (kernel/locking/lockdep.c:5240) 
[ 250.426698][ C3] ? find_held_lock (kernel/locking/lockdep.c:5353) 
[ 250.426702][ C3] ? __create_object (mm/kmemleak.c:776) 
[ 250.426704][ C3] ? __lock_release (kernel/locking/lockdep.c:5539) 
[ 250.426707][ C3] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:745) 
[ 250.426710][ C3] ? _raw_spin_unlock_irqrestore (./include/linux/spinlock_api_smp.h:151 kernel/locking/spinlock.c:194) 
[ 250.426713][ C3] ? lockdep_hardirqs_on (kernel/locking/lockdep.c:4475) 
[ 250.426718][ C3] ? lockdep_init_map_type (kernel/locking/lockdep.c:4976) 
[ 250.426721][ C3] ? __raw_spin_lock_init (kernel/locking/spinlock_debug.c:27) 
[ 250.426725][ C3] preinit_net (./include/linux/ref_tracker.h:79 net/core/net_namespace.c:406) 
[ 250.426728][ C3] copy_net_ns (net/core/net_namespace.c:567) 
[ 250.426733][ C3] create_new_namespaces (kernel/nsproxy.c:110) 
[ 250.426739][ C3] unshare_nsproxy_namespaces (kernel/nsproxy.c:218 (discriminator 4)) 
[ 250.426743][ C3] ksys_unshare (kernel/fork.c:3390) 
[ 250.426748][ C3] ? __pfx_ksys_unshare (kernel/fork.c:3341) 
[ 250.426753][ C3] ? 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) 
[ 250.426759][ C3] __x64_sys_unshare (kernel/fork.c:3459) 
[ 250.426762][ C3] do_syscall_64 (arch/x86/entry/syscall_64.c:63 arch/x86/entry/syscall_64.c:94) 
[ 250.426766][ C3] entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:130) 
[  250.426769][    C3] RIP: 0033:0x7f835602693b
[ 250.426771][ C3] Code: 73 01 c3 48 8b 0d c5 94 1b 00 f7 d8 64 89 01 48 83 c8 ff c3 66 2e 0f 1f 84 00 00 00 00 00 90 f3 0f 1e fa b8 10 01 00 00 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 8b 0d 95 94 1b 00 f7 d8 64 89 01 48
All code
========
   0:	73 01                	jae    0x3
   2:	c3                   	ret
   3:	48 8b 0d c5 94 1b 00 	mov    0x1b94c5(%rip),%rcx        # 0x1b94cf
   a:	f7 d8                	neg    %eax
   c:	64 89 01             	mov    %eax,%fs:(%rcx)
   f:	48 83 c8 ff          	or     $0xffffffffffffffff,%rax
  13:	c3                   	ret
  14:	66 2e 0f 1f 84 00 00 	cs nopw 0x0(%rax,%rax,1)
  1b:	00 00 00 
  1e:	90                   	nop
  1f:	f3 0f 1e fa          	endbr64
  23:	b8 10 01 00 00       	mov    $0x110,%eax
  28:	0f 05                	syscall
  2a:*	48 3d 01 f0 ff ff    	cmp    $0xfffffffffffff001,%rax		<-- trapping instruction
  30:	73 01                	jae    0x33
  32:	c3                   	ret
  33:	48 8b 0d 95 94 1b 00 	mov    0x1b9495(%rip),%rcx        # 0x1b94cf
  3a:	f7 d8                	neg    %eax
  3c:	64 89 01             	mov    %eax,%fs:(%rcx)
  3f:	48                   	rex.W

Code starting with the faulting instruction
===========================================
   0:	48 3d 01 f0 ff ff    	cmp    $0xfffffffffffff001,%rax
   6:	73 01                	jae    0x9
   8:	c3                   	ret
   9:	48 8b 0d 95 94 1b 00 	mov    0x1b9495(%rip),%rcx        # 0x1b94a5
  10:	f7 d8                	neg    %eax
  12:	64 89 01             	mov    %eax,%fs:(%rcx)
  15:	48                   	rex.W
[  250.426773][    C3] RSP: 002b:00007ffe69e64558 EFLAGS: 00000202 ORIG_RAX: 0000000000000110
[  250.426776][    C3] RAX: ffffffffffffffda RBX: 00007ffe69e64590 RCX: 00007f835602693b
[  250.426777][    C3] RDX: 0000000000000000 RSI: 00007ffe69e64590 RDI: 0000000040000000
[  250.426779][    C3] RBP: 00007f8355fe2000 R08: 0000000000000000 R09: 0000000000000000
[  250.426780][    C3] R10: 00007f8355ffbf18 R11: 0000000000000202 R12: 0000000000000001
[  250.426782][    C3] R13: 00007ffe69e64590 R14: 00007f8355fe2000 R15: 00000000004082a0
| [  250.464643][ T2390] Voluntary context switch within RCU read-side critical section!
| [ 250.464686][ T2390] WARNING: CPU: 3 PID: 2390 at kernel/rcu/tree_plugin.h:332 rcu_note_context_switch (kernel/rcu/tree_plugin.h:332 (discriminator 11)) 
| [  250.465516][ T2390] Modules linked in: cls_matchall ip6_gre gre vxlan act_mirred act_tunnel_key cls_flower bareudp mpls_gso mpls_iptunnel mpls_router cls_bpf sch_ingress
| [  250.466700][ T2390] Tainted: [W]=WARN
[  250.466877][ T2390] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[ 250.467169][ T2390] RIP: 0010:rcu_note_context_switch (kernel/rcu/tree_plugin.h:332 (discriminator 11)) 
[ 250.467466][ T2390] Code: 00 00 00 65 48 8b 3d 41 51 be 05 e8 04 86 fc ff e9 f6 fc ff ff c6 05 b7 3a ba 04 01 90 48 c7 c7 20 d6 ed 90 e8 1b d3 dd ff 90 <0f> 0b 90 90 e9 fd fa ff ff 4c 89 e7 e8 d9 af 69 00 e9 a2 fb ff ff
All code
========
   0:	00 00                	add    %al,(%rax)
   2:	00 65 48             	add    %ah,0x48(%rbp)
   5:	8b 3d 41 51 be 05    	mov    0x5be5141(%rip),%edi        # 0x5be514c
   b:	e8 04 86 fc ff       	call   0xfffffffffffc8614
  10:	e9 f6 fc ff ff       	jmp    0xfffffffffffffd0b
  15:	c6 05 b7 3a ba 04 01 	movb   $0x1,0x4ba3ab7(%rip)        # 0x4ba3ad3
  1c:	90                   	nop
  1d:	48 c7 c7 20 d6 ed 90 	mov    $0xffffffff90edd620,%rdi
  24:	e8 1b d3 dd ff       	call   0xffffffffffddd344
  29:	90                   	nop
  2a:*	0f 0b                	ud2		<-- trapping instruction
  2c:	90                   	nop
  2d:	90                   	nop
  2e:	e9 fd fa ff ff       	jmp    0xfffffffffffffb30
  33:	4c 89 e7             	mov    %r12,%rdi
  36:	e8 d9 af 69 00       	call   0x69b014
  3b:	e9 a2 fb ff ff       	jmp    0xfffffffffffffbe2

Code starting with the faulting instruction
===========================================
   0:	0f 0b                	ud2
   2:	90                   	nop
   3:	90                   	nop
   4:	e9 fd fa ff ff       	jmp    0xfffffffffffffb06
   9:	4c 89 e7             	mov    %r12,%rdi
   c:	e8 d9 af 69 00       	call   0x69afea
  11:	e9 a2 fb ff ff       	jmp    0xfffffffffffffbb8
[  250.468281][ T2390] RSP: 0018:ffffc90000270910 EFLAGS: 00010086
[  250.468576][ T2390] RAX: 0000000000000000 RBX: ffff88806cfb9f00 RCX: 0000000000000000
[  250.468927][ T2390] RDX: 0000000000000003 RSI: 0000000000000004 RDI: 0000000000000001
[  250.469279][ T2390] RBP: 0000000000000000 R08: 0000000000000000 R09: fffffbfff2440ca0
[  250.469630][ T2390] R10: 0000000000000003 R11: 0000000000000000 R12: ffff88800dd68040
[  250.469979][ T2390] R13: 0000000000000000 R14: 0000000000000000 R15: ffff88806cfb90c0
[  250.470328][ T2390] FS:  00007f8355fe4740(0000) GS:ffff8880d9121000(0000) knlGS:0000000000000000
[  250.470741][ T2390] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  250.471041][ T2390] CR2: 00007f8356026930 CR3: 0000000002aae002 CR4: 0000000000772ef0
[  250.471391][ T2390] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[  250.471743][ T2390] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[  250.472090][ T2390] PKRU: 55555554
[  250.472269][ T2390] Call Trace:
[  250.472447][ T2390]  <IRQ>
[ 250.472574][ T2390] __schedule (kernel/sched/core.c:604 (discriminator 3) kernel/sched/sched.h:1532 (discriminator 3) kernel/sched/sched.h:1856 (discriminator 3) kernel/sched/core.c:6705 (discriminator 3)) 
[ 250.472815][ T2390] ? __pfx_osq_unlock (kernel/locking/osq_lock.c:211) 
[ 250.473055][ T2390] ? __pfx___schedule (kernel/sched/core.c:6658) 
[ 250.473291][ T2390] ? rwsem_spin_on_owner (./arch/x86/include/asm/atomic64_64.h:15 ./include/linux/atomic/atomic-arch-fallback.h:2583 ./include/linux/atomic/atomic-long.h:38 ./include/linux/atomic/atomic-instrumented.h:3189 kernel/locking/rwsem.c:282 kernel/locking/rwsem.c:765) 
[ 250.473532][ T2390] ? rwsem_try_write_lock (./arch/x86/include/asm/atomic64_64.h:15 (discriminator 9) ./include/linux/atomic/atomic-arch-fallback.h:2583 (discriminator 9) ./include/linux/atomic/atomic-long.h:38 (discriminator 9) ./include/linux/atomic/atomic-instrumented.h:3189 (discriminator 9) kernel/locking/rwsem.c:610 (discriminator 9)) 
[ 250.473766][ T2390] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:745) 
[ 250.474002][ T2390] ? schedule (kernel/sched/core.c:6840 kernel/sched/core.c:6873) 
[ 250.474178][ T2390] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:745) 
[ 250.474426][ T2390] schedule (kernel/sched/core.c:6860 kernel/sched/core.c:6874) 
[ 250.474605][ T2390] schedule_preempt_disabled (kernel/sched/core.c:6932) 
[ 250.474838][ T2390] rwsem_down_write_slowpath (kernel/locking/rwsem.c:1178) 
[ 250.475073][ T2390] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:745) 
[ 250.475305][ T2390] ? __pfx_rwsem_down_write_slowpath (kernel/locking/rwsem.c:1106) 
[ 250.475598][ T2390] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:745) 
[ 250.475831][ T2390] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5834) 
[ 250.476073][ T2390] ? simple_recursive_removal (./include/linux/dcache.h:508 ./include/linux/dcache.h:513 fs/libfs.c:629) 
[ 250.476310][ T2390] ? __might_resched (kernel/sched/core.c:8757 (discriminator 11)) 
[ 250.476547][ T2390] down_write (./include/linux/err.h:70 kernel/locking/rwsem.c:1304 kernel/locking/rwsem.c:1313 kernel/locking/rwsem.c:1578) 
[ 250.476723][ T2390] ? __pfx_down_write (kernel/locking/rwsem.c:1575) 
[ 250.476961][ T2390] ? __up_write (./arch/x86/include/asm/preempt.h:104 kernel/locking/rwsem.c:1375) 
[ 250.477197][ T2390] ? trace_lock_release (./include/trace/events/lock.h:69 (discriminator 21)) 
[ 250.477433][ T2390] simple_recursive_removal (./include/linux/dcache.h:508 ./include/linux/dcache.h:513 fs/libfs.c:629) 
[ 250.477666][ T2390] ? 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) 
[ 250.477902][ T2390] ? __pfx_remove_one (fs/debugfs/inode.c:780) 
[ 250.478138][ T2390] debugfs_remove (fs/debugfs/inode.c:806 fs/debugfs/inode.c:799) 
[ 250.478371][ T2390] ref_tracker_dir_exit (lib/ref_tracker.c:412 lib/ref_tracker.c:196) 
[ 250.478604][ T2390] ? __pfx_ref_tracker_free (lib/ref_tracker.c:254) 
[ 250.478838][ T2390] ? __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) 
[ 250.479072][ T2390] ? rcu_do_batch (./include/linux/rcupdate.h:341 kernel/rcu/tree.c:2578) 
[ 250.479306][ T2390] ? __pfx_ref_tracker_dir_exit (lib/ref_tracker.c:190) 
[ 250.479544][ T2390] ? irq_exit_rcu (kernel/softirq.c:698) 
[ 250.479777][ T2390] ? sysvec_apic_timer_interrupt (arch/x86/kernel/apic/apic.c:1050 arch/x86/kernel/apic/apic.c:1050) 
[ 250.480069][ T2390] ? asm_sysvec_apic_timer_interrupt (./arch/x86/include/asm/idtentry.h:702) 
[ 250.480358][ T2390] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:745) 
[ 250.480590][ T2390] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5834) 
[ 250.480822][ T2390] ? unwind_next_frame (./include/linux/rcupdate.h:842 ./include/linux/rcupdate.h:1155 arch/x86/kernel/unwind_orc.c:479) 
[ 250.481055][ T2390] ? arch_stack_walk (arch/x86/kernel/stacktrace.c:24) 
[ 250.481293][ T2390] ? stack_trace_save (kernel/stacktrace.c:123) 
[ 250.481529][ T2390] ? kasan_save_stack (mm/kasan/common.c:48) 
[ 250.481764][ T2390] ? kasan_save_track (./arch/x86/include/asm/current.h:25 mm/kasan/common.c:60 mm/kasan/common.c:69) 
[ 250.481997][ T2390] ? __kasan_slab_alloc (mm/kasan/common.c:348) 
[ 250.482232][ T2390] __put_net (net/core/net_namespace.c:732) 
[ 250.482409][ T2390] __sk_destruct (./include/net/net_namespace.h:288 ./include/net/net_namespace.h:390 net/core/sock.c:2376) 
[ 250.482642][ T2390] ? rcu_do_batch (kernel/rcu/tree.c:2576) 
[ 250.482875][ T2390] rcu_do_batch (./include/linux/rcupdate.h:341 kernel/rcu/tree.c:2578) 
[ 250.483116][ T2390] ? find_held_lock (kernel/locking/lockdep.c:5353) 
[ 250.483351][ T2390] ? __pfx_rcu_do_batch (kernel/rcu/tree.c:2500) 
[ 250.483585][ T2390] ? mark_held_locks (kernel/locking/lockdep.c:4328) 
[ 250.483820][ T2390] ? note_gp_changes (kernel/rcu/tree.c:1326 (discriminator 1)) 
[ 250.484051][ T2390] ? lockdep_hardirqs_on (kernel/locking/lockdep.c:4475) 
[ 250.484293][ T2390] rcu_core (kernel/rcu/tree.c:2834) 
[ 250.484472][ T2390] handle_softirqs (kernel/softirq.c:580) 
[ 250.484720][ T2390] __irq_exit_rcu (kernel/softirq.c:614 kernel/softirq.c:453 kernel/softirq.c:680) 
[ 250.484963][ T2390] irq_exit_rcu (kernel/softirq.c:698) 
[ 250.485142][ T2390] sysvec_apic_timer_interrupt (arch/x86/kernel/apic/apic.c:1050 arch/x86/kernel/apic/apic.c:1050) 
[  250.485376][ T2390]  </IRQ>
[  250.485497][ T2390]  <TASK>
[ 250.485615][ T2390] asm_sysvec_apic_timer_interrupt (./arch/x86/include/asm/idtentry.h:702) 
[ 250.485906][ T2390] RIP: 0010:rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:745) 
[ 250.486143][ T2390] Code: e9 93 89 c5 83 f8 3f 0f 87 82 00 00 00 48 8d 3c ed 20 1e 97 91 48 b8 00 00 00 00 00 fc ff df 48 89 fa 48 c1 ea 03 80 3c 02 00 <75> 5c 48 03 1c ed 20 1e 97 91 48 b8 00 00 00 00 00 fc ff df 48 89
All code
========
   0:	e9 93 89 c5 83       	jmp    0xffffffff83c58998
   5:	f8                   	clc
   6:	3f                   	(bad)
   7:	0f 87 82 00 00 00    	ja     0x8f
   d:	48 8d 3c ed 20 1e 97 	lea    -0x6e68e1e0(,%rbp,8),%rdi
  14:	91 
  15:	48 b8 00 00 00 00 00 	movabs $0xdffffc0000000000,%rax
  1c:	fc ff df 
  1f:	48 89 fa             	mov    %rdi,%rdx
  22:	48 c1 ea 03          	shr    $0x3,%rdx
  26:	80 3c 02 00          	cmpb   $0x0,(%rdx,%rax,1)
  2a:*	75 5c                	jne    0x88		<-- trapping instruction
  2c:	48 03 1c ed 20 1e 97 	add    -0x6e68e1e0(,%rbp,8),%rbx
  33:	91 
  34:	48 b8 00 00 00 00 00 	movabs $0xdffffc0000000000,%rax
  3b:	fc ff df 
  3e:	48                   	rex.W
  3f:	89                   	.byte 0x89

Code starting with the faulting instruction
===========================================
   0:	75 5c                	jne    0x5e
   2:	48 03 1c ed 20 1e 97 	add    -0x6e68e1e0(,%rbp,8),%rbx
   9:	91 
   a:	48 b8 00 00 00 00 00 	movabs $0xdffffc0000000000,%rax
  11:	fc ff df 
  14:	48                   	rex.W
  15:	89                   	.byte 0x89
[  250.486956][ T2390] RSP: 0018:ffffc900008071b0 EFLAGS: 00000246
[  250.487251][ T2390] RAX: dffffc0000000000 RBX: ffffffff93e927d0 RCX: 0000000000000002
[  250.487604][ T2390] RDX: 1ffffffff232e3c7 RSI: ffffffff91056840 RDI: ffffffff91971e38
[  250.487952][ T2390] RBP: 0000000000000003 R08: 0000000000000000 R09: 0000000000000000
[  250.488305][ T2390] R10: ffffffff8e01d687 R11: ffffc90000807358 R12: 0000000000000000
[  250.488653][ T2390] R13: 0000000000000000 R14: 0000000000000002 R15: 0000000000000000
[ 250.488997][ T2390] ? 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) 
[ 250.489232][ T2390] lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5834) 
[ 250.489468][ T2390] ? 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) 
[ 250.489712][ T2390] unwind_next_frame (./include/linux/rcupdate.h:842 ./include/linux/rcupdate.h:1155 arch/x86/kernel/unwind_orc.c:479) 
[ 250.489947][ T2390] ? 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) 
[ 250.490179][ T2390] ? kasan_save_stack (mm/kasan/common.c:48) 
[ 250.490417][ T2390] ? __pfx_unwind_next_frame (arch/x86/kernel/unwind_orc.c:469) 
[ 250.490652][ T2390] ? kasan_save_stack (mm/kasan/common.c:48) 
[ 250.490888][ T2390] ? kernel_text_address (kernel/extable.c:99) 
[ 250.491127][ T2390] ? __pfx_stack_trace_consume_entry (kernel/stacktrace.c:83) 
[ 250.491425][ T2390] arch_stack_walk (arch/x86/kernel/stacktrace.c:24) 
[ 250.491663][ T2390] ? kasan_save_stack (mm/kasan/common.c:48) 
[ 250.491897][ T2390] stack_trace_save (kernel/stacktrace.c:123) 
[ 250.492129][ T2390] ? __pfx_stack_trace_save (kernel/stacktrace.c:114) 
[ 250.492363][ T2390] ? validate_chain (kernel/locking/lockdep.c:3804 kernel/locking/lockdep.c:3824 kernel/locking/lockdep.c:3879) 
[ 250.492599][ T2390] kasan_save_stack (mm/kasan/common.c:48) 
[ 250.492837][ T2390] ? kasan_save_stack (mm/kasan/common.c:48) 
[ 250.493077][ T2390] ? check_bytes_and_report (mm/slub.c:1212) 
[ 250.493314][ T2390] ? find_held_lock (kernel/locking/lockdep.c:5353) 
[ 250.493550][ T2390] ? mark_held_locks (kernel/locking/lockdep.c:4328) 
[ 250.493785][ T2390] ? _raw_spin_unlock_irqrestore (./include/linux/spinlock_api_smp.h:151 kernel/locking/spinlock.c:194) 
[ 250.494078][ T2390] ? lockdep_hardirqs_on (kernel/locking/lockdep.c:4475) 
[ 250.494322][ T2390] ? _raw_spin_unlock_irqrestore (./arch/x86/include/asm/preempt.h:104 ./include/linux/spinlock_api_smp.h:152 kernel/locking/spinlock.c:194) 
[ 250.494615][ T2390] ? get_partial_node.part.0 (mm/slub.c:2902) 
[ 250.494854][ T2390] ? ___slab_alloc (mm/slub.c:2863 mm/slub.c:2980 mm/slub.c:3838) 
[ 250.495089][ T2390] ? __alloc_object (mm/kmemleak.c:481 mm/kmemleak.c:661) 
[ 250.495325][ T2390] kasan_save_track (./arch/x86/include/asm/current.h:25 mm/kasan/common.c:60 mm/kasan/common.c:69) 
[ 250.495562][ T2390] __kasan_slab_alloc (mm/kasan/common.c:348) 
[ 250.495797][ T2390] kmem_cache_alloc_noprof (./include/linux/kasan.h:250 mm/slub.c:4147 mm/slub.c:4196 mm/slub.c:4203) 
[ 250.496033][ T2390] ? __d_alloc (fs/dcache.c:1690) 
[ 250.496211][ T2390] __alloc_object (mm/kmemleak.c:481 mm/kmemleak.c:661) 
[ 250.496445][ T2390] __create_object (mm/kmemleak.c:770) 
[ 250.496684][ T2390] kmem_cache_alloc_lru_noprof (./include/linux/kmemleak.h:43 mm/slub.c:4151 mm/slub.c:4196 mm/slub.c:4215) 
[ 250.496979][ T2390] __d_alloc (fs/dcache.c:1690) 
[ 250.497158][ T2390] d_alloc (fs/dcache.c:1769) 
[ 250.497336][ T2390] d_alloc_parallel (fs/dcache.c:2533) 
[ 250.497570][ T2390] ? __pfx_number (lib/vsprintf.c:453) 
[ 250.497805][ T2390] ? __pfx_widen_string (lib/vsprintf.c:612) 
[ 250.498040][ T2390] ? __pfx_d_alloc_parallel (fs/dcache.c:2529) 
[ 250.498276][ T2390] ? lockdep_init_map_type (kernel/locking/lockdep.c:4976) 
[ 250.498513][ T2390] ? lockdep_init_map_type (kernel/locking/lockdep.c:4976) 
[ 250.498750][ T2390] __lookup_slow (fs/namei.c:1802) 
[ 250.498985][ T2390] ? __pfx___lookup_slow (fs/namei.c:1793) 
[ 250.499221][ T2390] ? __d_lookup (./include/linux/rcupdate.h:341 ./include/linux/rcupdate.h:871 fs/dcache.c:2397) 
[ 250.499456][ T2390] ? lookup_dcache (fs/namei.c:1655) 
[ 250.499694][ T2390] start_creating.part.0 (fs/debugfs/inode.c:391) 
[ 250.499931][ T2390] __debugfs_create_file (fs/debugfs/inode.c:364 fs/debugfs/inode.c:437) 
[ 250.500169][ T2390] debugfs_create_file_full (fs/debugfs/inode.c:474) 
[ 250.500404][ T2390] ref_tracker_dir_debugfs.part.0 (lib/ref_tracker.c:382) 
[ 250.500696][ T2390] ? __pfx_ref_tracker_dir_debugfs.part.0 (lib/ref_tracker.c:369) 
[ 250.500987][ T2390] ? __lock_acquire (kernel/locking/lockdep.c:5240) 
[ 250.501222][ T2390] ? find_held_lock (kernel/locking/lockdep.c:5353) 
[ 250.501456][ T2390] ? __create_object (mm/kmemleak.c:776) 
[ 250.501693][ T2390] ? __lock_release (kernel/locking/lockdep.c:5539) 
[ 250.501927][ T2390] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:745) 
[ 250.502162][ T2390] ? _raw_spin_unlock_irqrestore (./include/linux/spinlock_api_smp.h:151 kernel/locking/spinlock.c:194) 
[ 250.502457][ T2390] ? lockdep_hardirqs_on (kernel/locking/lockdep.c:4475) 
[ 250.502696][ T2390] ? lockdep_init_map_type (kernel/locking/lockdep.c:4976) 
[ 250.502931][ T2390] ? __raw_spin_lock_init (kernel/locking/spinlock_debug.c:27) 
[ 250.503165][ T2390] preinit_net (./include/linux/ref_tracker.h:79 net/core/net_namespace.c:406) 
[ 250.503406][ T2390] copy_net_ns (net/core/net_namespace.c:567) 
[ 250.503642][ T2390] create_new_namespaces (kernel/nsproxy.c:110) 
[ 250.503880][ T2390] unshare_nsproxy_namespaces (kernel/nsproxy.c:218 (discriminator 4)) 
[ 250.504115][ T2390] ksys_unshare (kernel/fork.c:3390) 
[ 250.504359][ T2390] ? __pfx_ksys_unshare (kernel/fork.c:3341) 
[ 250.504595][ T2390] ? 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) 
[ 250.504830][ T2390] __x64_sys_unshare (kernel/fork.c:3459) 
[ 250.505061][ T2390] do_syscall_64 (arch/x86/entry/syscall_64.c:63 arch/x86/entry/syscall_64.c:94) 
[ 250.505302][ T2390] entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:130) 
[  250.505593][ T2390] RIP: 0033:0x7f835602693b
[ 250.505825][ T2390] Code: 73 01 c3 48 8b 0d c5 94 1b 00 f7 d8 64 89 01 48 83 c8 ff c3 66 2e 0f 1f 84 00 00 00 00 00 90 f3 0f 1e fa b8 10 01 00 00 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 8b 0d 95 94 1b 00 f7 d8 64 89 01 48
All code
========
   0:	73 01                	jae    0x3
   2:	c3                   	ret
   3:	48 8b 0d c5 94 1b 00 	mov    0x1b94c5(%rip),%rcx        # 0x1b94cf
   a:	f7 d8                	neg    %eax
   c:	64 89 01             	mov    %eax,%fs:(%rcx)
   f:	48 83 c8 ff          	or     $0xffffffffffffffff,%rax
  13:	c3                   	ret
  14:	66 2e 0f 1f 84 00 00 	cs nopw 0x0(%rax,%rax,1)
  1b:	00 00 00 
  1e:	90                   	nop
  1f:	f3 0f 1e fa          	endbr64
  23:	b8 10 01 00 00       	mov    $0x110,%eax
  28:	0f 05                	syscall
  2a:*	48 3d 01 f0 ff ff    	cmp    $0xfffffffffffff001,%rax		<-- trapping instruction
  30:	73 01                	jae    0x33
  32:	c3                   	ret
  33:	48 8b 0d 95 94 1b 00 	mov    0x1b9495(%rip),%rcx        # 0x1b94cf
  3a:	f7 d8                	neg    %eax
  3c:	64 89 01             	mov    %eax,%fs:(%rcx)
  3f:	48                   	rex.W

Code starting with the faulting instruction
===========================================
   0:	48 3d 01 f0 ff ff    	cmp    $0xfffffffffffff001,%rax
   6:	73 01                	jae    0x9
   8:	c3                   	ret
   9:	48 8b 0d 95 94 1b 00 	mov    0x1b9495(%rip),%rcx        # 0x1b94a5
  10:	f7 d8                	neg    %eax
  12:	64 89 01             	mov    %eax,%fs:(%rcx)
  15:	48                   	rex.W
[  250.506622][ T2390] RSP: 002b:00007ffe69e64558 EFLAGS: 00000202 ORIG_RAX: 0000000000000110
[  250.506978][ T2390] RAX: ffffffffffffffda RBX: 00007ffe69e64590 RCX: 00007f835602693b
[  250.507323][ T2390] RDX: 0000000000000000 RSI: 00007ffe69e64590 RDI: 0000000040000000
[  250.507667][ T2390] RBP: 00007f8355fe2000 R08: 0000000000000000 R09: 0000000000000000
[  250.508010][ T2390] R10: 00007f8355ffbf18 R11: 0000000000000202 R12: 0000000000000001
[  250.508356][ T2390] R13: 00007ffe69e64590 R14: 00007f8355fe2000 R15: 00000000004082a0
| [  250.510959][ T2390] ------------[ cut here ]------------
| [ 250.511024][ T2390] WARNING: CPU: 3 PID: 2390 at arch/x86/kernel/process_64.c:617 __switch_to (arch/x86/kernel/process_64.c:617 (discriminator 11)) 
| [  250.511151][ T2390] Modules linked in: cls_matchall ip6_gre gre vxlan act_mirred act_tunnel_key cls_flower bareudp mpls_gso mpls_iptunnel mpls_router cls_bpf sch_ingress
| [  250.511486][ T2390] Tainted: [W]=WARN
[  250.511540][ T2390] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[ 250.511622][ T2390] RIP: 0010:__switch_to (arch/x86/kernel/process_64.c:617 (discriminator 11)) 
[ 250.511689][ T2390] Code: 00 49 c7 84 24 48 16 00 00 00 00 00 00 e9 d6 fc ff ff 48 89 ee 4c 89 e7 e8 e0 f0 02 00 e9 c3 fb ff ff 8e db e9 5e f9 ff ff 90 <0f> 0b 90 e9 d1 f5 ff ff 8e c3 e9 cb f8 ff ff 80 e4 fd 80 e7 fd e9
All code
========
   0:	00 49 c7             	add    %cl,-0x39(%rcx)
   3:	84 24 48             	test   %ah,(%rax,%rcx,2)
   6:	16                   	(bad)
   7:	00 00                	add    %al,(%rax)
   9:	00 00                	add    %al,(%rax)
   b:	00 00                	add    %al,(%rax)
   d:	e9 d6 fc ff ff       	jmp    0xfffffffffffffce8
  12:	48 89 ee             	mov    %rbp,%rsi
  15:	4c 89 e7             	mov    %r12,%rdi
  18:	e8 e0 f0 02 00       	call   0x2f0fd
  1d:	e9 c3 fb ff ff       	jmp    0xfffffffffffffbe5
  22:	8e db                	mov    %ebx,%ds
  24:	e9 5e f9 ff ff       	jmp    0xfffffffffffff987
  29:	90                   	nop
  2a:*	0f 0b                	ud2		<-- trapping instruction
  2c:	90                   	nop
  2d:	e9 d1 f5 ff ff       	jmp    0xfffffffffffff603
  32:	8e c3                	mov    %ebx,%es
  34:	e9 cb f8 ff ff       	jmp    0xfffffffffffff904
  39:	80 e4 fd             	and    $0xfd,%ah
  3c:	80 e7 fd             	and    $0xfd,%bh
  3f:	e9                   	.byte 0xe9

Code starting with the faulting instruction
===========================================
   0:	0f 0b                	ud2
   2:	90                   	nop
   3:	e9 d1 f5 ff ff       	jmp    0xfffffffffffff5d9
   8:	8e c3                	mov    %ebx,%es
   a:	e9 cb f8 ff ff       	jmp    0xfffffffffffff8da
   f:	80 e4 fd             	and    $0xfd,%ah
  12:	80 e7 fd             	and    $0xfd,%bh
  15:	e9                   	.byte 0xe9
[  250.511911][ T2390] RSP: 0018:ffffc90000157ce0 EFLAGS: 00010002
[  250.511995][ T2390] RAX: 0000000000000001 RBX: ffff88806cfb90d8 RCX: 0000000000000000
[  250.512092][ T2390] RDX: 1ffff1100d9f721a RSI: ffffffff91056840 RDI: ffffffff91056880
[  250.512184][ T2390] RBP: ffff888001b645c0 R08: 0000000000000001 R09: ffffed100228c2a8
[  250.512282][ T2390] R10: ffff888011461543 R11: ffff88800dd68558 R12: ffff88800dd68040
[  250.512385][ T2390] R13: 0000000000000003 R14: ffff88800dd69660 R15: ffff88806cfb90c0
[  250.512483][ T2390] FS:  00007f8355fe4740(0000) GS:ffff8880d9121000(0000) knlGS:0000000000000000
[  250.512593][ T2390] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  250.512677][ T2390] CR2: 00007f8356026930 CR3: 0000000002aae002 CR4: 0000000000772ef0
[  250.512782][ T2390] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[  250.512876][ T2390] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[  250.512968][ T2390] PKRU: 55555554
[  250.513021][ T2390] Call Trace:
[  250.513072][ T2390] irq event stamp: 620
[ 250.513121][ T2390] hardirqs last enabled at (620): kasan_quarantine_put (mm/kasan/quarantine.c:234 (discriminator 1)) 
[ 250.513237][ T2390] hardirqs last disabled at (619): kasan_quarantine_put (mm/kasan/quarantine.c:209 (discriminator 1)) 
[ 250.513347][ T2390] softirqs last enabled at (0): copy_process (kernel/fork.c:2375) 
[ 250.513459][ T2390] softirqs last disabled at (243): __irq_exit_rcu (kernel/softirq.c:614 kernel/softirq.c:453 kernel/softirq.c:680) 
| [  432.319492][    C1] rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
| [  432.319820][    C1] rcu: Tasks blocked on level-0 rcu_node (CPUs 0-3): P2390/1:b..l
| [  432.320078][    C1] rcu: (detected by 1, t=182014 jiffies, g=145957, q=4576 ncpus=4)
| [  432.320327][    C1] task:so_incoming_cpu state:D stack:28800 pid:2390  tgid:2390  ppid:1      task_flags:0x400140 flags:0x00004006
| [  432.320743][    C1] Call Trace:
[  493.144552][   T44] INFO: task so_incoming_cpu:2390 blocked for more than 122 seconds.
[  493.144992][   T44]       Tainted: G        W           6.15.0-virtme #1
[  493.145181][   T44] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
[  493.145433][   T44] task:so_incoming_cpu state:D stack:28800 pid:2390  tgid:2390  ppid:1      task_flags:0x400140 flags:0x00004006
[  493.145807][   T44] Call Trace:
[  493.145940][   T44] INFO: task so_incoming_cpu:2392 blocked for more than 122 seconds.
[  493.146153][   T44]       Tainted: G        W           6.15.0-virtme #1
[  493.146334][   T44] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
[  493.146582][   T44] task:so_incoming_cpu state:D stack:29672 pid:2392  tgid:2392  ppid:1      task_flags:0x400140 flags:0x00004006
[  493.146927][   T44] Call Trace:
[  493.147048][   T44]  <TASK>
[ 493.147142][ T44] __schedule (kernel/sched/core.c:5392 kernel/sched/core.c:6781) 
[ 493.147312][ T44] ? __pfx___schedule (kernel/sched/core.c:6658) 
[ 493.147475][ T44] ? rwsem_try_write_lock (./arch/x86/include/asm/atomic64_64.h:15 (discriminator 9) ./include/linux/atomic/atomic-arch-fallback.h:2583 (discriminator 9) ./include/linux/atomic/atomic-long.h:38 (discriminator 9) ./include/linux/atomic/atomic-instrumented.h:3189 (discriminator 9) kernel/locking/rwsem.c:610 (discriminator 9)) 
[ 493.147645][ T44] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:745) 
[ 493.147812][ T44] ? schedule (kernel/sched/core.c:6840 kernel/sched/core.c:6873) 
[ 493.147934][ T44] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:745) 
[ 493.148091][ T44] schedule (kernel/sched/core.c:6860 kernel/sched/core.c:6874) 
[ 493.148216][ T44] schedule_preempt_disabled (kernel/sched/core.c:6932) 
[ 493.148371][ T44] rwsem_down_write_slowpath (kernel/locking/rwsem.c:1178) 
[ 493.148540][ T44] ? __pfx_rwsem_down_write_slowpath (kernel/locking/rwsem.c:1106) 
[ 493.148728][ T44] ? kernel_text_address (kernel/extable.c:97 kernel/extable.c:94) 
[ 493.148892][ T44] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:745) 
[ 493.149054][ T44] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5834) 
[ 493.149214][ T44] ? start_creating.part.0 (./include/linux/dcache.h:527 fs/debugfs/inode.c:388) 
[ 493.149374][ T44] down_write (./include/linux/err.h:70 kernel/locking/rwsem.c:1304 kernel/locking/rwsem.c:1313 kernel/locking/rwsem.c:1578) 
[ 493.149502][ T44] ? __pfx_down_write (kernel/locking/rwsem.c:1575) 
[ 493.149660][ T44] ? 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) 
[ 493.149822][ T44] ? _raw_spin_unlock (./arch/x86/include/asm/preempt.h:104 ./include/linux/spinlock_api_smp.h:143 kernel/locking/spinlock.c:186) 
[ 493.149985][ T44] start_creating.part.0 (./include/linux/dcache.h:527 fs/debugfs/inode.c:388) 
[ 493.150142][ T44] __debugfs_create_file (fs/debugfs/inode.c:364 fs/debugfs/inode.c:437) 
[ 493.150304][ T44] debugfs_create_file_full (fs/debugfs/inode.c:474) 
[ 493.150461][ T44] ref_tracker_dir_debugfs.part.0 (lib/ref_tracker.c:382) 
[ 493.150662][ T44] ? __pfx_ref_tracker_dir_debugfs.part.0 (lib/ref_tracker.c:369) 
[ 493.150853][ T44] ? 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) 
[ 493.151017][ T44] ? __pfx_do_raw_spin_lock (kernel/locking/spinlock_debug.c:114) 
[ 493.151174][ T44] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:745) 
[ 493.151336][ T44] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:745) 
[ 493.151502][ T44] ? trace_irq_enable.constprop.0 (./include/trace/events/preemptirq.h:40) 
[ 493.151705][ T44] ? lockdep_init_map_type (kernel/locking/lockdep.c:4976) 
[ 493.151860][ T44] ? __raw_spin_lock_init (kernel/locking/spinlock_debug.c:27) 
[ 493.152016][ T44] preinit_net (./include/linux/ref_tracker.h:79 net/core/net_namespace.c:406) 
[ 493.152174][ T44] copy_net_ns (net/core/net_namespace.c:567) 
[ 493.152330][ T44] create_new_namespaces (kernel/nsproxy.c:110) 
[ 493.152516][ T44] unshare_nsproxy_namespaces (kernel/nsproxy.c:218 (discriminator 4)) 
[ 493.152680][ T44] ? handle_mm_fault (mm/memory.c:6321) 
[ 493.152839][ T44] ksys_unshare (kernel/fork.c:3390) 
[ 493.152998][ T44] ? __pfx_ksys_unshare (kernel/fork.c:3341) 
[ 493.153152][ T44] ? 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) 
[ 493.153307][ T44] ? trace_lock_release (./include/trace/events/lock.h:69 (discriminator 21)) 
[ 493.153465][ T44] ? lock_release (kernel/locking/lockdep.c:118 kernel/locking/lockdep.c:5884) 
[ 493.153628][ T44] ? 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) 
[ 493.153793][ T44] __x64_sys_unshare (kernel/fork.c:3459) 
[ 493.153947][ T44] do_syscall_64 (arch/x86/entry/syscall_64.c:63 arch/x86/entry/syscall_64.c:94) 
[ 493.154108][ T44] entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:130) 
[  493.154298][   T44] RIP: 0033:0x7f835602693b
[  493.154464][   T44] RSP: 002b:00007ffe69e64558 EFLAGS: 00000202 ORIG_RAX: 0000000000000110
[  493.154706][   T44] RAX: ffffffffffffffda RBX: 00007ffe69e64590 RCX: 00007f835602693b
[  493.154939][   T44] RDX: 0000000000000000 RSI: 00007ffe69e64590 RDI: 0000000040000000
[  493.155165][   T44] RBP: 00007f8355fe1000 R08: 0000000000000000 R09: 0000000000000000
[  493.155395][   T44] R10: 00007f8355ffbf18 R11: 0000000000000202 R12: 0000000000000001
[  493.155638][   T44] R13: 00007ffe69e64590 R14: 00007f8355fe1000 R15: 00000000004082a0
| [  493.154939][   T44] RDX: 0000000000000000 RSI: 00007ffe69e64590 RDI: 0000000040000000
| [  493.155165][   T44] RBP: 00007f8355fe1000 R08: 0000000000000000 R09: 0000000000000000
| [  493.155395][   T44] R10: 00007f8355ffbf18 R11: 0000000000000202 R12: 0000000000000001
| [  493.155638][   T44] R13: 00007ffe69e64590 R14: 00007f8355fe1000 R15: 00000000004082a0
| [  493.155873][   T44]  </TASK>
[  493.156000][   T44] INFO: task so_incoming_cpu:2394 blocked for more than 122 seconds.
[  493.156213][   T44]       Tainted: G        W           6.15.0-virtme #1
[  493.156393][   T44] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
[  493.156647][   T44] task:so_incoming_cpu state:D stack:29672 pid:2394  tgid:2394  ppid:1      task_flags:0x400140 flags:0x00004006
[  493.156980][   T44] Call Trace:
[  493.157101][   T44]  <TASK>
[ 493.157187][ T44] __schedule (kernel/sched/core.c:5392 kernel/sched/core.c:6781) 
[ 493.157346][ T44] ? __pfx___schedule (kernel/sched/core.c:6658) 
[ 493.157512][ T44] ? rwsem_try_write_lock (./arch/x86/include/asm/atomic64_64.h:15 (discriminator 9) ./include/linux/atomic/atomic-arch-fallback.h:2583 (discriminator 9) ./include/linux/atomic/atomic-long.h:38 (discriminator 9) ./include/linux/atomic/atomic-instrumented.h:3189 (discriminator 9) kernel/locking/rwsem.c:610 (discriminator 9)) 
[ 493.157669][ T44] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:745) 
[ 493.157832][ T44] ? schedule (kernel/sched/core.c:6840 kernel/sched/core.c:6873) 
[ 493.157955][ T44] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:745) 
[ 493.158117][ T44] schedule (kernel/sched/core.c:6860 kernel/sched/core.c:6874) 
[ 493.158239][ T44] schedule_preempt_disabled (kernel/sched/core.c:6932) 
[ 493.158392][ T44] rwsem_down_write_slowpath (kernel/locking/rwsem.c:1178) 
[ 493.158557][ T44] ? __pfx_rwsem_down_write_slowpath (kernel/locking/rwsem.c:1106) 
[ 493.158748][ T44] ? kernel_text_address (kernel/extable.c:97 kernel/extable.c:94) 
[ 493.158907][ T44] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:745) 
[ 493.159060][ T44] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5834) 
[ 493.159221][ T44] ? start_creating.part.0 (./include/linux/dcache.h:527 fs/debugfs/inode.c:388) 
[ 493.159380][ T44] down_write (./include/linux/err.h:70 kernel/locking/rwsem.c:1304 kernel/locking/rwsem.c:1313 kernel/locking/rwsem.c:1578) 
[ 493.159510][ T44] ? __pfx_down_write (kernel/locking/rwsem.c:1575) 
[ 493.159665][ T44] ? 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) 
[ 493.159822][ T44] ? _raw_spin_unlock (./arch/x86/include/asm/preempt.h:104 ./include/linux/spinlock_api_smp.h:143 kernel/locking/spinlock.c:186) 
[ 493.159978][ T44] start_creating.part.0 (./include/linux/dcache.h:527 fs/debugfs/inode.c:388) 
[ 493.160134][ T44] __debugfs_create_file (fs/debugfs/inode.c:364 fs/debugfs/inode.c:437) 
[ 493.160294][ T44] debugfs_create_file_full (fs/debugfs/inode.c:474) 
[ 493.160447][ T44] ref_tracker_dir_debugfs.part.0 (lib/ref_tracker.c:382) 
[ 493.160645][ T44] ? __pfx_ref_tracker_dir_debugfs.part.0 (lib/ref_tracker.c:369) 
[ 493.160837][ T44] ? 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) 
[ 493.160993][ T44] ? __pfx_do_raw_spin_lock (kernel/locking/spinlock_debug.c:114) 
[ 493.161147][ T44] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:745) 
[ 493.161301][ T44] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:745) 
[ 493.161456][ T44] ? trace_irq_enable.constprop.0 (./include/trace/events/preemptirq.h:40) 
[ 493.161653][ T44] ? lockdep_init_map_type (kernel/locking/lockdep.c:4976) 
[ 493.161807][ T44] ? __raw_spin_lock_init (kernel/locking/spinlock_debug.c:27) 
[ 493.161964][ T44] preinit_net (./include/linux/ref_tracker.h:79 net/core/net_namespace.c:406) 
[ 493.162121][ T44] copy_net_ns (net/core/net_namespace.c:567) 
[ 493.162278][ T44] create_new_namespaces (kernel/nsproxy.c:110) 
[ 493.162435][ T44] unshare_nsproxy_namespaces (kernel/nsproxy.c:218 (discriminator 4)) 
[ 493.162616][ T44] ? handle_mm_fault (mm/memory.c:6321) 
[ 493.162772][ T44] ksys_unshare (kernel/fork.c:3390) 
[ 493.162930][ T44] ? __pfx_ksys_unshare (kernel/fork.c:3341) 
[ 493.163083][ T44] ? 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) 
[ 493.163240][ T44] ? trace_lock_release (./include/trace/events/lock.h:69 (discriminator 21)) 
[ 493.163402][ T44] ? lock_release (kernel/locking/lockdep.c:118 kernel/locking/lockdep.c:5884) 
[ 493.163566][ T44] ? 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) 
[ 493.163730][ T44] __x64_sys_unshare (kernel/fork.c:3459) 
[ 493.163886][ T44] do_syscall_64 (arch/x86/entry/syscall_64.c:63 arch/x86/entry/syscall_64.c:94) 
[ 493.164046][ T44] entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:130) 
[  493.164234][   T44] RIP: 0033:0x7f835602693b
[  493.164393][   T44] RSP: 002b:00007ffe69e64558 EFLAGS: 00000202 ORIG_RAX: 0000000000000110
[  493.164627][   T44] RAX: ffffffffffffffda RBX: 00007ffe69e64590 RCX: 00007f835602693b
[  493.164855][   T44] RDX: 0000000000000000 RSI: 00007ffe69e64590 RDI: 0000000040000000
[  493.165080][   T44] RBP: 00007f8355fe3000 R08: 0000000000000000 R09: 0000000000000000
[  493.165305][   T44] R10: 00007f8355ffbf18 R11: 0000000000000202 R12: 0000000000000001
[  493.165537][   T44] R13: 00007ffe69e64590 R14: 00007f8355fe3000 R15: 00000000004082a0
| [  493.164855][   T44] RDX: 0000000000000000 RSI: 00007ffe69e64590 RDI: 0000000040000000
| [  493.165080][   T44] RBP: 00007f8355fe3000 R08: 0000000000000000 R09: 0000000000000000
| [  493.165305][   T44] R10: 00007f8355ffbf18 R11: 0000000000000202 R12: 0000000000000001
| [  493.165537][   T44] R13: 00007ffe69e64590 R14: 00007f8355fe3000 R15: 00000000004082a0
| [  493.165766][   T44]  </TASK>
[  493.165893][   T44] INFO: task so_incoming_cpu:2397 blocked for more than 122 seconds.
[  493.166107][   T44]       Tainted: G        W           6.15.0-virtme #1
[  493.166290][   T44] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
[  493.166542][   T44] task:so_incoming_cpu state:D stack:29672 pid:2397  tgid:2397  ppid:1      task_flags:0x400140 flags:0x00004006
[  493.166876][   T44] Call Trace:
[  493.167000][   T44]  <TASK>
[ 493.167086][ T44] __schedule (kernel/sched/core.c:5392 kernel/sched/core.c:6781) 
[ 493.167247][ T44] ? __pfx___schedule (kernel/sched/core.c:6658) 
[ 493.167414][ T44] ? rwsem_try_write_lock (./arch/x86/include/asm/atomic64_64.h:15 (discriminator 9) ./include/linux/atomic/atomic-arch-fallback.h:2583 (discriminator 9) ./include/linux/atomic/atomic-long.h:38 (discriminator 9) ./include/linux/atomic/atomic-instrumented.h:3189 (discriminator 9) kernel/locking/rwsem.c:610 (discriminator 9)) 
[ 493.167582][ T44] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:745) 
[ 493.167741][ T44] ? schedule (kernel/sched/core.c:6840 kernel/sched/core.c:6873) 
[ 493.167860][ T44] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:745) 
[ 493.168021][ T44] schedule (kernel/sched/core.c:6860 kernel/sched/core.c:6874) 
[ 493.168146][ T44] schedule_preempt_disabled (kernel/sched/core.c:6932) 
[ 493.168301][ T44] rwsem_down_write_slowpath (kernel/locking/rwsem.c:1178) 
[ 493.168462][ T44] ? __pfx_rwsem_down_write_slowpath (kernel/locking/rwsem.c:1106) 
[ 493.168658][ T44] ? kernel_text_address (kernel/extable.c:97 kernel/extable.c:94) 
[ 493.168820][ T44] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:745) 
[ 493.168974][ T44] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5834) 
[ 493.169131][ T44] ? start_creating.part.0 (./include/linux/dcache.h:527 fs/debugfs/inode.c:388) 
[ 493.169289][ T44] down_write (./include/linux/err.h:70 kernel/locking/rwsem.c:1304 kernel/locking/rwsem.c:1313 kernel/locking/rwsem.c:1578) 
[ 493.169412][ T44] ? __pfx_down_write (kernel/locking/rwsem.c:1575) 
[ 493.169572][ T44] ? 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) 
[ 493.169729][ T44] ? _raw_spin_unlock (./arch/x86/include/asm/preempt.h:104 ./include/linux/spinlock_api_smp.h:143 kernel/locking/spinlock.c:186) 
[ 493.169883][ T44] start_creating.part.0 (./include/linux/dcache.h:527 fs/debugfs/inode.c:388) 
[ 493.170042][ T44] __debugfs_create_file (fs/debugfs/inode.c:364 fs/debugfs/inode.c:437) 
[ 493.170202][ T44] debugfs_create_file_full (fs/debugfs/inode.c:474) 
[ 493.170359][ T44] ref_tracker_dir_debugfs.part.0 (lib/ref_tracker.c:382) 
[ 493.170555][ T44] ? __pfx_ref_tracker_dir_debugfs.part.0 (lib/ref_tracker.c:369) 
[ 493.170755][ T44] ? 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) 
[ 493.170915][ T44] ? __pfx_do_raw_spin_lock (kernel/locking/spinlock_debug.c:114) 
[ 493.171069][ T44] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:745) 
[ 493.171227][ T44] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:745) 
[ 493.171383][ T44] ? trace_irq_enable.constprop.0 (./include/trace/events/preemptirq.h:40) 
[ 493.171581][ T44] ? lockdep_init_map_type (kernel/locking/lockdep.c:4976) 
[ 493.171736][ T44] ? __raw_spin_lock_init (kernel/locking/spinlock_debug.c:27) 
[ 493.171894][ T44] preinit_net (./include/linux/ref_tracker.h:79 net/core/net_namespace.c:406) 
[ 493.172053][ T44] copy_net_ns (net/core/net_namespace.c:567) 
[ 493.172216][ T44] create_new_namespaces (kernel/nsproxy.c:110) 
[ 493.172375][ T44] unshare_nsproxy_namespaces (kernel/nsproxy.c:218 (discriminator 4)) 
[ 493.172552][ T44] ? handle_mm_fault (mm/memory.c:6321) 
[ 493.172713][ T44] ksys_unshare (kernel/fork.c:3390) 
[ 493.172870][ T44] ? __pfx_ksys_unshare (kernel/fork.c:3341) 
[ 493.173025][ T44] ? 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) 
[ 493.173179][ T44] ? trace_lock_release (./include/trace/events/lock.h:69 (discriminator 21)) 
[ 493.173338][ T44] ? lock_release (kernel/locking/lockdep.c:118 kernel/locking/lockdep.c:5884) 
[ 493.173499][ T44] ? 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) 
[ 493.173664][ T44] __x64_sys_unshare (kernel/fork.c:3459) 
[ 493.173822][ T44] do_syscall_64 (arch/x86/entry/syscall_64.c:63 arch/x86/entry/syscall_64.c:94) 
[ 493.173980][ T44] entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:130) 
[  493.174173][   T44] RIP: 0033:0x7f835602693b
[  493.174337][   T44] RSP: 002b:00007ffe69e64558 EFLAGS: 00000202 ORIG_RAX: 0000000000000110
[  493.174571][   T44] RAX: ffffffffffffffda RBX: 00007ffe69e64590 RCX: 00007f835602693b
[  493.174799][   T44] RDX: 0000000000000000 RSI: 00007ffe69e64590 RDI: 0000000040000000
[  493.175030][   T44] RBP: 00007f8355fe2000 R08: 0000000000000000 R09: 0000000000000000
[  493.175258][   T44] R10: 00007f8355ffbf18 R11: 0000000000000202 R12: 0000000000000001
[  493.175494][   T44] R13: 00007ffe69e64590 R14: 00007f8355fe2000 R15: 00000000004082a0
| [  588.331494][    C0] rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
| [  588.331929][    C0] rcu: Tasks blocked on level-0 rcu_node (CPUs 0-3): P2390/1:b..l
| [  588.332225][    C0] rcu: (detected by 0, t=338026 jiffies, g=145957, q=6643 ncpus=4)
| [  588.332503][    C0] task:so_incoming_cpu state:D stack:28800 pid:2390  tgid:2390  ppid:1      task_flags:0x400140 flags:0x00004006
| [  588.332948][    C0] Call Trace:
[  616.024549][   T44] INFO: task so_incoming_cpu:2390 blocked for more than 245 seconds.
[  616.024998][   T44]       Tainted: G        W           6.15.0-virtme #1
[  616.025182][   T44] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
[  616.025435][   T44] task:so_incoming_cpu state:D stack:28800 pid:2390  tgid:2390  ppid:1      task_flags:0x400140 flags:0x00004006
[  616.025796][   T44] Call Trace:
[  616.025923][   T44] INFO: task so_incoming_cpu:2392 blocked for more than 245 seconds.
[  616.026136][   T44]       Tainted: G        W           6.15.0-virtme #1
[  616.026314][   T44] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
[  616.026578][   T44] task:so_incoming_cpu state:D stack:29672 pid:2392  tgid:2392  ppid:1      task_flags:0x400140 flags:0x00004006
[  616.026911][   T44] Call Trace:
[  616.027033][   T44]  <TASK>
[ 616.027122][ T44] __schedule (kernel/sched/core.c:5392 kernel/sched/core.c:6781) 
[ 616.027294][ T44] ? __pfx___schedule (kernel/sched/core.c:6658) 
[ 616.027456][ T44] ? rwsem_try_write_lock (./arch/x86/include/asm/atomic64_64.h:15 (discriminator 9) ./include/linux/atomic/atomic-arch-fallback.h:2583 (discriminator 9) ./include/linux/atomic/atomic-long.h:38 (discriminator 9) ./include/linux/atomic/atomic-instrumented.h:3189 (discriminator 9) kernel/locking/rwsem.c:610 (discriminator 9)) 
[ 616.027622][ T44] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:745) 
[ 616.027788][ T44] ? schedule (kernel/sched/core.c:6840 kernel/sched/core.c:6873) 
[ 616.027909][ T44] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:745) 
[ 616.028069][ T44] schedule (kernel/sched/core.c:6860 kernel/sched/core.c:6874) 
[ 616.028189][ T44] schedule_preempt_disabled (kernel/sched/core.c:6932) 
[ 616.028343][ T44] rwsem_down_write_slowpath (kernel/locking/rwsem.c:1178) 
[ 616.028510][ T44] ? __pfx_rwsem_down_write_slowpath (kernel/locking/rwsem.c:1106) 
[ 616.028699][ T44] ? kernel_text_address (kernel/extable.c:97 kernel/extable.c:94) 
[ 616.028865][ T44] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:745) 
[ 616.029022][ T44] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5834) 
[ 616.029177][ T44] ? start_creating.part.0 (./include/linux/dcache.h:527 fs/debugfs/inode.c:388) 
[ 616.029334][ T44] down_write (./include/linux/err.h:70 kernel/locking/rwsem.c:1304 kernel/locking/rwsem.c:1313 kernel/locking/rwsem.c:1578) 
[ 616.029457][ T44] ? __pfx_down_write (kernel/locking/rwsem.c:1575) 
[ 616.029622][ T44] ? 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) 
[ 616.029780][ T44] ? _raw_spin_unlock (./arch/x86/include/asm/preempt.h:104 ./include/linux/spinlock_api_smp.h:143 kernel/locking/spinlock.c:186) 
[ 616.029936][ T44] start_creating.part.0 (./include/linux/dcache.h:527 fs/debugfs/inode.c:388) 
[ 616.030103][ T44] __debugfs_create_file (fs/debugfs/inode.c:364 fs/debugfs/inode.c:437) 
[ 616.030261][ T44] debugfs_create_file_full (fs/debugfs/inode.c:474) 
[ 616.030415][ T44] ref_tracker_dir_debugfs.part.0 (lib/ref_tracker.c:382) 
[ 616.030616][ T44] ? __pfx_ref_tracker_dir_debugfs.part.0 (lib/ref_tracker.c:369) 
[ 616.030805][ T44] ? 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) 
[ 616.030962][ T44] ? __pfx_do_raw_spin_lock (kernel/locking/spinlock_debug.c:114) 
[ 616.031129][ T44] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:745) 
[ 616.031286][ T44] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:745) 
[ 616.031438][ T44] ? trace_irq_enable.constprop.0 (./include/trace/events/preemptirq.h:40) 
[ 616.031647][ T44] ? lockdep_init_map_type (kernel/locking/lockdep.c:4976) 
[ 616.031801][ T44] ? __raw_spin_lock_init (kernel/locking/spinlock_debug.c:27) 
[ 616.031958][ T44] preinit_net (./include/linux/ref_tracker.h:79 net/core/net_namespace.c:406) 
[ 616.032122][ T44] copy_net_ns (net/core/net_namespace.c:567) 
[ 616.032283][ T44] create_new_namespaces (kernel/nsproxy.c:110) 
[ 616.032443][ T44] unshare_nsproxy_namespaces (kernel/nsproxy.c:218 (discriminator 4)) 
[ 616.032608][ T44] ? handle_mm_fault (mm/memory.c:6321) 
[ 616.032764][ T44] ksys_unshare (kernel/fork.c:3390) 
[ 616.032923][ T44] ? __pfx_ksys_unshare (kernel/fork.c:3341) 
[ 616.033077][ T44] ? 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) 
[ 616.033247][ T44] ? trace_lock_release (./include/trace/events/lock.h:69 (discriminator 21)) 
[ 616.033403][ T44] ? lock_release (kernel/locking/lockdep.c:118 kernel/locking/lockdep.c:5884) 
[ 616.033568][ T44] ? 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) 
[ 616.033730][ T44] __x64_sys_unshare (kernel/fork.c:3459) 
[ 616.033884][ T44] do_syscall_64 (arch/x86/entry/syscall_64.c:63 arch/x86/entry/syscall_64.c:94) 
[ 616.034044][ T44] entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:130) 
[  616.034237][   T44] RIP: 0033:0x7f835602693b
[  616.034399][   T44] RSP: 002b:00007ffe69e64558 EFLAGS: 00000202 ORIG_RAX: 0000000000000110
[  616.034634][   T44] RAX: ffffffffffffffda RBX: 00007ffe69e64590 RCX: 00007f835602693b
[  616.034863][   T44] RDX: 0000000000000000 RSI: 00007ffe69e64590 RDI: 0000000040000000
[  616.035085][   T44] RBP: 00007f8355fe1000 R08: 0000000000000000 R09: 0000000000000000
[  616.035314][   T44] R10: 00007f8355ffbf18 R11: 0000000000000202 R12: 0000000000000001
[  616.035548][   T44] R13: 00007ffe69e64590 R14: 00007f8355fe1000 R15: 00000000004082a0
| [  616.034863][   T44] RDX: 0000000000000000 RSI: 00007ffe69e64590 RDI: 0000000040000000
| [  616.035085][   T44] RBP: 00007f8355fe1000 R08: 0000000000000000 R09: 0000000000000000
| [  616.035314][   T44] R10: 00007f8355ffbf18 R11: 0000000000000202 R12: 0000000000000001
| [  616.035548][   T44] R13: 00007ffe69e64590 R14: 00007f8355fe1000 R15: 00000000004082a0
| [  616.035778][   T44]  </TASK>
[  616.035900][   T44] INFO: task so_incoming_cpu:2394 blocked for more than 245 seconds.
[  616.036111][   T44]       Tainted: G        W           6.15.0-virtme #1
[  616.036293][   T44] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
[  616.036539][   T44] task:so_incoming_cpu state:D stack:29672 pid:2394  tgid:2394  ppid:1      task_flags:0x400140 flags:0x00004006
[  616.036869][   T44] Call Trace:
[  616.036988][   T44]  <TASK>
[ 616.037074][ T44] __schedule (kernel/sched/core.c:5392 kernel/sched/core.c:6781) 
[ 616.037234][ T44] ? __pfx___schedule (kernel/sched/core.c:6658) 
[ 616.037391][ T44] ? rwsem_try_write_lock (./arch/x86/include/asm/atomic64_64.h:15 (discriminator 9) ./include/linux/atomic/atomic-arch-fallback.h:2583 (discriminator 9) ./include/linux/atomic/atomic-long.h:38 (discriminator 9) ./include/linux/atomic/atomic-instrumented.h:3189 (discriminator 9) kernel/locking/rwsem.c:610 (discriminator 9)) 
[ 616.037551][ T44] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:745) 
[ 616.037706][ T44] ? schedule (kernel/sched/core.c:6840 kernel/sched/core.c:6873) 
[ 616.037828][ T44] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:745) 
[ 616.037983][ T44] schedule (kernel/sched/core.c:6860 kernel/sched/core.c:6874) 
[ 616.038104][ T44] schedule_preempt_disabled (kernel/sched/core.c:6932) 
[ 616.038260][ T44] rwsem_down_write_slowpath (kernel/locking/rwsem.c:1178) 
[ 616.038416][ T44] ? __pfx_rwsem_down_write_slowpath (kernel/locking/rwsem.c:1106) 
[ 616.038615][ T44] ? kernel_text_address (kernel/extable.c:97 kernel/extable.c:94) 
[ 616.038774][ T44] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:745) 
[ 616.038932][ T44] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5834) 
[ 616.039088][ T44] ? start_creating.part.0 (./include/linux/dcache.h:527 fs/debugfs/inode.c:388) 
[ 616.039247][ T44] down_write (./include/linux/err.h:70 kernel/locking/rwsem.c:1304 kernel/locking/rwsem.c:1313 kernel/locking/rwsem.c:1578) 
[ 616.039368][ T44] ? __pfx_down_write (kernel/locking/rwsem.c:1575) 
[ 616.039528][ T44] ? 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) 
[ 616.039683][ T44] ? _raw_spin_unlock (./arch/x86/include/asm/preempt.h:104 ./include/linux/spinlock_api_smp.h:143 kernel/locking/spinlock.c:186) 
[ 616.039840][ T44] start_creating.part.0 (./include/linux/dcache.h:527 fs/debugfs/inode.c:388) 
[ 616.040002][ T44] __debugfs_create_file (fs/debugfs/inode.c:364 fs/debugfs/inode.c:437) 
[ 616.040160][ T44] debugfs_create_file_full (fs/debugfs/inode.c:474) 
[ 616.040317][ T44] ref_tracker_dir_debugfs.part.0 (lib/ref_tracker.c:382) 
[ 616.040513][ T44] ? __pfx_ref_tracker_dir_debugfs.part.0 (lib/ref_tracker.c:369) 
[ 616.040702][ T44] ? 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) 
[ 616.040857][ T44] ? __pfx_do_raw_spin_lock (kernel/locking/spinlock_debug.c:114) 
[ 616.041009][ T44] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:745) 
[ 616.041170][ T44] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:745) 
[ 616.041325][ T44] ? trace_irq_enable.constprop.0 (./include/trace/events/preemptirq.h:40) 
[ 616.041522][ T44] ? lockdep_init_map_type (kernel/locking/lockdep.c:4976) 
[ 616.041679][ T44] ? __raw_spin_lock_init (kernel/locking/spinlock_debug.c:27) 
[ 616.041835][ T44] preinit_net (./include/linux/ref_tracker.h:79 net/core/net_namespace.c:406) 
[ 616.041991][ T44] copy_net_ns (net/core/net_namespace.c:567) 
[ 616.042152][ T44] create_new_namespaces (kernel/nsproxy.c:110) 
[ 616.042314][ T44] unshare_nsproxy_namespaces (kernel/nsproxy.c:218 (discriminator 4)) 
[ 616.042468][ T44] ? handle_mm_fault (mm/memory.c:6321) 
[ 616.042632][ T44] ksys_unshare (kernel/fork.c:3390) 
[ 616.042793][ T44] ? __pfx_ksys_unshare (kernel/fork.c:3341) 
[ 616.042948][ T44] ? 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) 
[ 616.043106][ T44] ? trace_lock_release (./include/trace/events/lock.h:69 (discriminator 21)) 
[ 616.043262][ T44] ? lock_release (kernel/locking/lockdep.c:118 kernel/locking/lockdep.c:5884) 
[ 616.043418][ T44] ? 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) 
[ 616.043584][ T44] __x64_sys_unshare (kernel/fork.c:3459) 
[ 616.043739][ T44] do_syscall_64 (arch/x86/entry/syscall_64.c:63 arch/x86/entry/syscall_64.c:94) 
[ 616.043898][ T44] entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:130) 
[  616.044085][   T44] RIP: 0033:0x7f835602693b
[  616.044244][   T44] RSP: 002b:00007ffe69e64558 EFLAGS: 00000202 ORIG_RAX: 0000000000000110
[  616.044471][   T44] RAX: ffffffffffffffda RBX: 00007ffe69e64590 RCX: 00007f835602693b
[  616.044710][   T44] RDX: 0000000000000000 RSI: 00007ffe69e64590 RDI: 0000000040000000
[  616.044938][   T44] RBP: 00007f8355fe3000 R08: 0000000000000000 R09: 0000000000000000
[  616.045165][   T44] R10: 00007f8355ffbf18 R11: 0000000000000202 R12: 0000000000000001
[  616.045394][   T44] R13: 00007ffe69e64590 R14: 00007f8355fe3000 R15: 00000000004082a0
| [  616.044710][   T44] RDX: 0000000000000000 RSI: 00007ffe69e64590 RDI: 0000000040000000
| [  616.044938][   T44] RBP: 00007f8355fe3000 R08: 0000000000000000 R09: 0000000000000000
| [  616.045165][   T44] R10: 00007f8355ffbf18 R11: 0000000000000202 R12: 0000000000000001
| [  616.045394][   T44] R13: 00007ffe69e64590 R14: 00007f8355fe3000 R15: 00000000004082a0
| [  616.045629][   T44]  </TASK>
[  616.045752][   T44] INFO: task so_incoming_cpu:2397 blocked for more than 245 seconds.
[  616.045961][   T44]       Tainted: G        W           6.15.0-virtme #1
[  616.046139][   T44] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
[  616.046384][   T44] task:so_incoming_cpu state:D stack:29672 pid:2397  tgid:2397  ppid:1      task_flags:0x400140 flags:0x00004006
[  616.046720][   T44] Call Trace:
[  616.046840][   T44]  <TASK>
[ 616.046925][ T44] __schedule (kernel/sched/core.c:5392 kernel/sched/core.c:6781) 
[ 616.047081][ T44] ? __pfx___schedule (kernel/sched/core.c:6658) 
[ 616.047238][ T44] ? rwsem_try_write_lock (./arch/x86/include/asm/atomic64_64.h:15 (discriminator 9) ./include/linux/atomic/atomic-arch-fallback.h:2583 (discriminator 9) ./include/linux/atomic/atomic-long.h:38 (discriminator 9) ./include/linux/atomic/atomic-instrumented.h:3189 (discriminator 9) kernel/locking/rwsem.c:610 (discriminator 9)) 
[ 616.047400][ T44] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:745) 
[ 616.047566][ T44] ? schedule (kernel/sched/core.c:6840 kernel/sched/core.c:6873) 
[ 616.047685][ T44] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:745) 
[ 616.047845][ T44] schedule (kernel/sched/core.c:6860 kernel/sched/core.c:6874) 
[ 616.047965][ T44] schedule_preempt_disabled (kernel/sched/core.c:6932) 
[ 616.048118][ T44] rwsem_down_write_slowpath (kernel/locking/rwsem.c:1178) 
[ 616.048273][ T44] ? __pfx_rwsem_down_write_slowpath (kernel/locking/rwsem.c:1106) 
[ 616.048463][ T44] ? kernel_text_address (kernel/extable.c:97 kernel/extable.c:94) 
[ 616.048627][ T44] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:745) 
[ 616.048780][ T44] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5834) 
[ 616.048944][ T44] ? start_creating.part.0 (./include/linux/dcache.h:527 fs/debugfs/inode.c:388) 
[ 616.049099][ T44] down_write (./include/linux/err.h:70 kernel/locking/rwsem.c:1304 kernel/locking/rwsem.c:1313 kernel/locking/rwsem.c:1578) 
[ 616.049219][ T44] ? __pfx_down_write (kernel/locking/rwsem.c:1575) 
[ 616.049376][ T44] ? 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) 
[ 616.049538][ T44] ? _raw_spin_unlock (./arch/x86/include/asm/preempt.h:104 ./include/linux/spinlock_api_smp.h:143 kernel/locking/spinlock.c:186) 
[ 616.049692][ T44] start_creating.part.0 (./include/linux/dcache.h:527 fs/debugfs/inode.c:388) 
[ 616.049846][ T44] __debugfs_create_file (fs/debugfs/inode.c:364 fs/debugfs/inode.c:437) 
[ 616.050011][ T44] debugfs_create_file_full (fs/debugfs/inode.c:474) 
[ 616.050164][ T44] ref_tracker_dir_debugfs.part.0 (lib/ref_tracker.c:382) 
[ 616.050360][ T44] ? __pfx_ref_tracker_dir_debugfs.part.0 (lib/ref_tracker.c:369) 
[ 616.050554][ T44] ? 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) 
[ 616.050709][ T44] ? __pfx_do_raw_spin_lock (kernel/locking/spinlock_debug.c:114) 
[ 616.050862][ T44] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:745) 
[ 616.051020][ T44] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:745) 
[ 616.051173][ T44] ? trace_irq_enable.constprop.0 (./include/trace/events/preemptirq.h:40) 
[ 616.051367][ T44] ? lockdep_init_map_type (kernel/locking/lockdep.c:4976) 
[ 616.051527][ T44] ? __raw_spin_lock_init (kernel/locking/spinlock_debug.c:27) 
[ 616.051695][ T44] preinit_net (./include/linux/ref_tracker.h:79 net/core/net_namespace.c:406) 
[ 616.051852][ T44] copy_net_ns (net/core/net_namespace.c:567) 
[ 616.052010][ T44] create_new_namespaces (kernel/nsproxy.c:110) 
[ 616.052170][ T44] unshare_nsproxy_namespaces (kernel/nsproxy.c:218 (discriminator 4)) 
[ 616.052323][ T44] ? handle_mm_fault (mm/memory.c:6321) 
[ 616.052483][ T44] ksys_unshare (kernel/fork.c:3390) 
[ 616.052648][ T44] ? __pfx_ksys_unshare (kernel/fork.c:3341) 
[ 616.052802][ T44] ? 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) 
[ 616.052958][ T44] ? trace_lock_release (./include/trace/events/lock.h:69 (discriminator 21)) 
[ 616.053120][ T44] ? lock_release (kernel/locking/lockdep.c:118 kernel/locking/lockdep.c:5884) 
[ 616.053273][ T44] ? 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) 
[ 616.053439][ T44] __x64_sys_unshare (kernel/fork.c:3459) 
[ 616.053602][ T44] do_syscall_64 (arch/x86/entry/syscall_64.c:63 arch/x86/entry/syscall_64.c:94) 
[ 616.053760][ T44] entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:130) 
[  616.053946][   T44] RIP: 0033:0x7f835602693b
[  616.054105][   T44] RSP: 002b:00007ffe69e64558 EFLAGS: 00000202 ORIG_RAX: 0000000000000110
[  616.054330][   T44] RAX: ffffffffffffffda RBX: 00007ffe69e64590 RCX: 00007f835602693b
[  616.054567][   T44] RDX: 0000000000000000 RSI: 00007ffe69e64590 RDI: 0000000040000000
[  616.054789][   T44] RBP: 00007f8355fe2000 R08: 0000000000000000 R09: 0000000000000000
[  616.055012][   T44] R10: 00007f8355ffbf18 R11: 0000000000000202 R12: 0000000000000001
[  616.055239][   T44] R13: 00007ffe69e64590 R14: 00007f8355fe2000 R15: 00000000004082a0
| [  616.054567][   T44] RDX: 0000000000000000 RSI: 00007ffe69e64590 RDI: 0000000040000000
| [  616.054789][   T44] RBP: 00007f8355fe2000 R08: 0000000000000000 R09: 0000000000000000
| [  616.055012][   T44] R10: 00007f8355ffbf18 R11: 0000000000000202 R12: 0000000000000001
| [  616.055239][   T44] R13: 00007ffe69e64590 R14: 00007f8355fe2000 R15: 00000000004082a0
| [  616.055469][   T44]  </TASK>
[  616.055597][   T44] INFO: task so_incoming_cpu:2399 blocked for more than 122 seconds.
[  616.055805][   T44]       Tainted: G        W           6.15.0-virtme #1
[  616.055983][   T44] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
[  616.056221][   T44] task:so_incoming_cpu state:D stack:29672 pid:2399  tgid:2399  ppid:1      task_flags:0x400140 flags:0x00004006
[  616.056564][   T44] Call Trace:
[  616.056682][   T44]  <TASK>
[ 616.056768][ T44] __schedule (kernel/sched/core.c:5392 kernel/sched/core.c:6781) 
[ 616.056925][ T44] ? __pfx___schedule (kernel/sched/core.c:6658) 
[ 616.057081][ T44] ? rwsem_try_write_lock (./arch/x86/include/asm/atomic64_64.h:15 (discriminator 9) ./include/linux/atomic/atomic-arch-fallback.h:2583 (discriminator 9) ./include/linux/atomic/atomic-long.h:38 (discriminator 9) ./include/linux/atomic/atomic-instrumented.h:3189 (discriminator 9) kernel/locking/rwsem.c:610 (discriminator 9)) 
[ 616.057235][ T44] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:745) 
[ 616.057394][ T44] ? schedule (kernel/sched/core.c:6840 kernel/sched/core.c:6873) 
[ 616.057518][ T44] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:745) 
[ 616.057677][ T44] schedule (kernel/sched/core.c:6860 kernel/sched/core.c:6874) 
[ 616.057797][ T44] schedule_preempt_disabled (kernel/sched/core.c:6932) 
[ 616.057951][ T44] rwsem_down_write_slowpath (kernel/locking/rwsem.c:1178) 
[ 616.058107][ T44] ? __pfx_rwsem_down_write_slowpath (kernel/locking/rwsem.c:1106) 
[ 616.058292][ T44] ? kernel_text_address (kernel/extable.c:97 kernel/extable.c:94) 
[ 616.058453][ T44] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:745) 
[ 616.058613][ T44] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5834) 
[ 616.058769][ T44] ? start_creating.part.0 (./include/linux/dcache.h:527 fs/debugfs/inode.c:388) 
[ 616.058923][ T44] down_write (./include/linux/err.h:70 kernel/locking/rwsem.c:1304 kernel/locking/rwsem.c:1313 kernel/locking/rwsem.c:1578) 
[ 616.059044][ T44] ? __pfx_down_write (kernel/locking/rwsem.c:1575) 
[ 616.059197][ T44] ? 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) 
[ 616.059351][ T44] ? _raw_spin_unlock (./arch/x86/include/asm/preempt.h:104 ./include/linux/spinlock_api_smp.h:143 kernel/locking/spinlock.c:186) 
[ 616.059515][ T44] start_creating.part.0 (./include/linux/dcache.h:527 fs/debugfs/inode.c:388) 
[ 616.059670][ T44] __debugfs_create_file (fs/debugfs/inode.c:364 fs/debugfs/inode.c:437) 
[ 616.059829][ T44] debugfs_create_file_full (fs/debugfs/inode.c:474) 
[ 616.059982][ T44] ref_tracker_dir_debugfs.part.0 (lib/ref_tracker.c:382) 
[ 616.060172][ T44] ? __pfx_ref_tracker_dir_debugfs.part.0 (lib/ref_tracker.c:369) 
[ 616.060364][ T44] ? 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) 
[ 616.060529][ T44] ? __pfx_do_raw_spin_lock (kernel/locking/spinlock_debug.c:114) 
[ 616.060683][ T44] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:745) 
[ 616.060838][ T44] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:745) 
[ 616.060994][ T44] ? trace_irq_enable.constprop.0 (./include/trace/events/preemptirq.h:40) 
[ 616.061184][ T44] ? lockdep_init_map_type (kernel/locking/lockdep.c:4976) 
[ 616.061337][ T44] ? __raw_spin_lock_init (kernel/locking/spinlock_debug.c:27) 
[ 616.061501][ T44] preinit_net (./include/linux/ref_tracker.h:79 net/core/net_namespace.c:406) 
[ 616.061663][ T44] copy_net_ns (net/core/net_namespace.c:567) 
[ 616.061820][ T44] create_new_namespaces (kernel/nsproxy.c:110) 
[ 616.061976][ T44] unshare_nsproxy_namespaces (kernel/nsproxy.c:218 (discriminator 4)) 
[ 616.062136][ T44] ? handle_mm_fault (mm/memory.c:6321) 
[ 616.062291][ T44] ksys_unshare (kernel/fork.c:3390) 
[ 616.062446][ T44] ? __pfx_ksys_unshare (kernel/fork.c:3341) 
[ 616.062610][ T44] ? 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) 
[ 616.062765][ T44] ? trace_lock_release (./include/trace/events/lock.h:69 (discriminator 21)) 
[ 616.062923][ T44] ? lock_release (kernel/locking/lockdep.c:118 kernel/locking/lockdep.c:5884) 
[ 616.063077][ T44] ? 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) 
[ 616.063235][ T44] __x64_sys_unshare (kernel/fork.c:3459) 
[ 616.063395][ T44] do_syscall_64 (arch/x86/entry/syscall_64.c:63 arch/x86/entry/syscall_64.c:94) 
[ 616.063561][ T44] entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:130) 
[  616.063746][   T44] RIP: 0033:0x7f835602693b
[  616.063904][   T44] RSP: 002b:00007ffe69e64558 EFLAGS: 00000202 ORIG_RAX: 0000000000000110
[  616.064127][   T44] RAX: ffffffffffffffda RBX: 00007ffe69e64590 RCX: 00007f835602693b
[  616.064351][   T44] RDX: 0000000000000000 RSI: 00007ffe69e64590 RDI: 0000000040000000
[  616.064601][   T44] RBP: 00007f8355fe1000 R08: 0000000000000000 R09: 0000000000000000
[  616.064824][   T44] R10: 00007f8355ffbf18 R11: 0000000000000202 R12: 0000000000000001
[  616.065048][   T44] R13: 00007ffe69e64590 R14: 00007f8355fe1000 R15: 00000000004082a0
| [  616.064351][   T44] RDX: 0000000000000000 RSI: 00007ffe69e64590 RDI: 0000000040000000
| [  616.064601][   T44] RBP: 00007f8355fe1000 R08: 0000000000000000 R09: 0000000000000000
| [  616.064824][   T44] R10: 00007f8355ffbf18 R11: 0000000000000202 R12: 0000000000000001
| [  616.065048][   T44] R13: 00007ffe69e64590 R14: 00007f8355fe1000 R15: 00000000004082a0
| [  616.065272][   T44]  </TASK>
[  616.065399][   T44] INFO: task so_incoming_cpu:2401 blocked for more than 122 seconds.
[  616.065620][   T44]       Tainted: G        W           6.15.0-virtme #1
[  616.065797][   T44] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
[  616.066037][   T44] task:so_incoming_cpu state:D stack:29672 pid:2401  tgid:2401  ppid:1      task_flags:0x400140 flags:0x00004006
[  616.066375][   T44] Call Trace:
[  616.066503][   T44]  <TASK>
[ 616.066590][ T44] __schedule (kernel/sched/core.c:5392 kernel/sched/core.c:6781) 
[ 616.066747][ T44] ? __pfx___schedule (kernel/sched/core.c:6658) 
[ 616.066904][ T44] ? rwsem_try_write_lock (./arch/x86/include/asm/atomic64_64.h:15 (discriminator 9) ./include/linux/atomic/atomic-arch-fallback.h:2583 (discriminator 9) ./include/linux/atomic/atomic-long.h:38 (discriminator 9) ./include/linux/atomic/atomic-instrumented.h:3189 (discriminator 9) kernel/locking/rwsem.c:610 (discriminator 9)) 
[ 616.067058][ T44] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:745) 
[ 616.067212][ T44] ? schedule (kernel/sched/core.c:6840 kernel/sched/core.c:6873) 
[ 616.067331][ T44] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:745) 
[ 616.067496][ T44] schedule (kernel/sched/core.c:6860 kernel/sched/core.c:6874) 
[ 616.067626][ T44] schedule_preempt_disabled (kernel/sched/core.c:6932) 
[ 616.067779][ T44] rwsem_down_write_slowpath (kernel/locking/rwsem.c:1178) 
[ 616.067935][ T44] ? __pfx_rwsem_down_write_slowpath (kernel/locking/rwsem.c:1106) 
[ 616.068122][ T44] ? kernel_text_address (kernel/extable.c:97 kernel/extable.c:94) 
[ 616.068279][ T44] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:745) 
[ 616.068431][ T44] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5834) 
[ 616.068596][ T44] ? start_creating.part.0 (./include/linux/dcache.h:527 fs/debugfs/inode.c:388) 
[ 616.068759][ T44] down_write (./include/linux/err.h:70 kernel/locking/rwsem.c:1304 kernel/locking/rwsem.c:1313 kernel/locking/rwsem.c:1578) 
[ 616.068880][ T44] ? __pfx_down_write (kernel/locking/rwsem.c:1575) 
[ 616.069033][ T44] ? 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) 
[ 616.069187][ T44] ? _raw_spin_unlock (./arch/x86/include/asm/preempt.h:104 ./include/linux/spinlock_api_smp.h:143 kernel/locking/spinlock.c:186) 
[ 616.069342][ T44] start_creating.part.0 (./include/linux/dcache.h:527 fs/debugfs/inode.c:388) 
[ 616.069503][ T44] __debugfs_create_file (fs/debugfs/inode.c:364 fs/debugfs/inode.c:437) 
[ 616.069664][ T44] debugfs_create_file_full (fs/debugfs/inode.c:474) 
[ 616.069822][ T44] ref_tracker_dir_debugfs.part.0 (lib/ref_tracker.c:382) 
[ 616.070011][ T44] ? __pfx_ref_tracker_dir_debugfs.part.0 (lib/ref_tracker.c:369) 
[ 616.070201][ T44] ? 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) 
[ 616.070356][ T44] ? __pfx_do_raw_spin_lock (kernel/locking/spinlock_debug.c:114) 
[ 616.070515][ T44] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:745) 
[ 616.070674][ T44] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:745) 
[ 616.070825][ T44] ? trace_irq_enable.constprop.0 (./include/trace/events/preemptirq.h:40) 
[ 616.071028][ T44] ? lockdep_init_map_type (kernel/locking/lockdep.c:4976) 
[ 616.071181][ T44] ? __raw_spin_lock_init (kernel/locking/spinlock_debug.c:27) 
[ 616.071336][ T44] preinit_net (./include/linux/ref_tracker.h:79 net/core/net_namespace.c:406) 
[ 616.071497][ T44] copy_net_ns (net/core/net_namespace.c:567) 
[ 616.071665][ T44] create_new_namespaces (kernel/nsproxy.c:110) 
[ 616.071821][ T44] unshare_nsproxy_namespaces (kernel/nsproxy.c:218 (discriminator 4)) 
[ 616.071981][ T44] ? handle_mm_fault (mm/memory.c:6321) 
[ 616.072137][ T44] ksys_unshare (kernel/fork.c:3390) 
[ 616.072291][ T44] ? __pfx_ksys_unshare (kernel/fork.c:3341) 
[ 616.072466][ T44] ? 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) 
[ 616.072632][ T44] ? trace_lock_release (./include/trace/events/lock.h:69 (discriminator 21)) 
[ 616.072787][ T44] ? lock_release (kernel/locking/lockdep.c:118 kernel/locking/lockdep.c:5884) 
[ 616.072939][ T44] ? 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) 
[ 616.073097][ T44] __x64_sys_unshare (kernel/fork.c:3459) 
[ 616.073257][ T44] do_syscall_64 (arch/x86/entry/syscall_64.c:63 arch/x86/entry/syscall_64.c:94) 
[ 616.073413][ T44] entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:130) 
[  616.073607][   T44] RIP: 0033:0x7f835602693b
[  616.073771][   T44] RSP: 002b:00007ffe69e64558 EFLAGS: 00000202 ORIG_RAX: 0000000000000110
[  616.073993][   T44] RAX: ffffffffffffffda RBX: 00007ffe69e64590 RCX: 00007f835602693b
[  616.074217][   T44] RDX: 0000000000000000 RSI: 00007ffe69e64590 RDI: 0000000040000000
[  616.074443][   T44] RBP: 00007f8355fe3000 R08: 0000000000000000 R09: 0000000000000000
[  616.074680][   T44] R10: 00007f8355ffbf18 R11: 0000000000000202 R12: 0000000000000001


Finger prints:
__might_resched:down_write:simple_recursive_removal:debugfs_remove:ref_tracker_dir_exit
__schedule_bug:schedule_debug:__schedule:schedule:schedule_preempt_disabled
__switch_to:kasan_quarantine_put:kasan_quarantine_put:copy_process:__irq_exit_rcu
mark_lock_irq:mark_lock:mark_usage:__lock_acquire:_raw_spin_lock
__schedule:schedule:schedule_preempt_disabled:rwsem_down_write_slowpath:down_write
rcu_note_context_switch:__schedule:schedule:schedule_preempt_disabled:rwsem_down_write_slowpath