======================================
| [ 16.043464][ C3] #3: ffffffff9ab775e0 (rcu_read_lock){....}-{1:3}, at: unwind_next_frame (./include/linux/rcupdate.h:331 ./include/linux/rcupdate.h:841 ./include/linux/rcupdate.h:1155 arch/x86/kernel/unwind_orc.c:479) 
| [ 16.043850][ C3] #4: ffffffff9ab774c0 (rcu_callback){....}-{0:0}, at: rcu_do_batch (./include/linux/rcupdate.h:331 kernel/rcu/tree.c:2570) 
| [   16.044234][    C3]
| [   16.044234][    C3] stack backtrace:
[   16.044512][    C3] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[   16.044514][    C3] Call Trace:
[   16.044516][    C3]  <IRQ>
[ 16.044518][ C3] dump_stack_lvl (lib/dump_stack.c:123) 
[ 16.044524][ C3] print_usage_bug.part.0 (kernel/locking/lockdep.c:4048) 
[ 16.044529][ C3] mark_lock_irq (kernel/locking/lockdep.c:4013 kernel/locking/lockdep.c:4059 kernel/locking/lockdep.c:4270) 
[ 16.044534][ C3] ? __pfx_unwind_next_frame (arch/x86/kernel/unwind_orc.c:469) 
[ 16.044538][ C3] ? save_trace (kernel/locking/lockdep.c:595) 
[ 16.044544][ C3] mark_lock (kernel/locking/lockdep.c:4756) 
[ 16.044547][ C3] mark_usage (kernel/locking/lockdep.c:4645) 
[ 16.044550][ C3] __lock_acquire (kernel/locking/lockdep.c:5194) 
[ 16.044554][ C3] ? __lock_acquire (kernel/locking/lockdep.c:5240) 
[ 16.044558][ C3] lock_acquire.part.0 (kernel/locking/lockdep.c:473 kernel/locking/lockdep.c:5873) 
[ 16.044560][ C3] ? simple_pin_fs (fs/libfs.c:1067) 
[ 16.044565][ C3] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:745) 
[ 16.044569][ C3] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5834) 
[ 16.044574][ C3] ? simple_pin_fs (fs/libfs.c:1067) 
[ 16.044579][ C3] _raw_spin_lock (./include/linux/spinlock_api_smp.h:134 kernel/locking/spinlock.c:154) 
[ 16.044582][ C3] ? simple_pin_fs (fs/libfs.c:1067) 
[ 16.044585][ C3] simple_pin_fs (fs/libfs.c:1067) 
[ 16.044590][ C3] debugfs_remove (fs/debugfs/inode.c:805 fs/debugfs/inode.c:799) 
[ 16.044593][ C3] ref_tracker_dir_exit (lib/ref_tracker.c:412 lib/ref_tracker.c:196) 
[ 16.044601][ C3] ? __pfx_ref_tracker_free (lib/ref_tracker.c:254) 
[ 16.044604][ 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) 
[ 16.044612][ C3] ? rcu_do_batch (kernel/rcu/tree.c:2576) 
[ 16.044615][ C3] ? __pfx_ref_tracker_dir_exit (lib/ref_tracker.c:190) 
[ 16.044618][ C3] ? irq_exit_rcu (kernel/softirq.c:698) 
[ 16.044621][ C3] ? sysvec_apic_timer_interrupt (arch/x86/kernel/apic/apic.c:1050 arch/x86/kernel/apic/apic.c:1050) 
[ 16.044626][ C3] ? asm_sysvec_apic_timer_interrupt (./arch/x86/include/asm/idtentry.h:702) 
[ 16.044630][ C3] ? lock_acquire.part.0 (kernel/locking/lockdep.c:5875) 
[ 16.044633][ C3] ? unwind_next_frame (./include/linux/rcupdate.h:842 ./include/linux/rcupdate.h:1155 arch/x86/kernel/unwind_orc.c:479) 
[ 16.044635][ C3] ? arch_stack_walk (arch/x86/kernel/stacktrace.c:24) 
[ 16.044639][ C3] ? stack_trace_save (kernel/stacktrace.c:123) 
[ 16.044643][ C3] ? kasan_save_stack (mm/kasan/common.c:48) 
[ 16.044647][ C3] ? kasan_record_aux_stack (mm/kasan/generic.c:548) 
[ 16.044650][ C3] ? __call_rcu_common.constprop.0 (./arch/x86/include/asm/irqflags.h:26 ./arch/x86/include/asm/irqflags.h:109 ./arch/x86/include/asm/irqflags.h:127 kernel/rcu/tree.c:3092) 
[ 16.044654][ C3] ? kmem_cache_free (./include/linux/kmemleak.h:49 mm/slub.c:2305 mm/slub.c:4642 mm/slub.c:4744) 
[ 16.044661][ C3] __put_net (net/core/net_namespace.c:732) 
[ 16.044665][ C3] __sk_destruct (./include/net/net_namespace.h:288 ./include/net/net_namespace.h:390 net/core/sock.c:2376) 
[ 16.044669][ C3] ? rcu_do_batch (kernel/rcu/tree.c:2576) 
[ 16.044671][ C3] rcu_do_batch (kernel/rcu/tree.c:2576) 
[ 16.044675][ C3] ? find_held_lock (kernel/locking/lockdep.c:5353) 
[ 16.044679][ C3] ? __pfx_rcu_do_batch (kernel/rcu/tree.c:2500) 
[ 16.044682][ C3] ? _raw_spin_unlock_irqrestore (./include/linux/spinlock_api_smp.h:151 kernel/locking/spinlock.c:194) 
[ 16.044686][ C3] ? lockdep_hardirqs_on (kernel/locking/lockdep.c:4475) 
[ 16.044689][ C3] ? _raw_spin_unlock_irqrestore (./arch/x86/include/asm/preempt.h:104 ./include/linux/spinlock_api_smp.h:152 kernel/locking/spinlock.c:194) 
[ 16.044693][ C3] rcu_core (kernel/rcu/tree.c:2834) 
[ 16.044697][ C3] handle_softirqs (kernel/softirq.c:579) 
[ 16.044703][ C3] __irq_exit_rcu (kernel/softirq.c:614 kernel/softirq.c:453 kernel/softirq.c:680) 
[ 16.044705][ C3] irq_exit_rcu (kernel/softirq.c:698) 
[ 16.044708][ C3] sysvec_apic_timer_interrupt (arch/x86/kernel/apic/apic.c:1050 arch/x86/kernel/apic/apic.c:1050) 
[   16.044712][    C3]  </IRQ>
[   16.044713][    C3]  <TASK>
[ 16.044714][ C3] asm_sysvec_apic_timer_interrupt (./arch/x86/include/asm/idtentry.h:702) 
[ 16.044717][ C3] RIP: 0010:lock_acquire.part.0 (kernel/locking/lockdep.c:5875) 
[ 16.044721][ C3] Code: ff ff ff 65 0f c1 05 fd 8b 14 05 83 f8 01 0f 85 3e 01 00 00 9c 58 f6 c4 02 0f 85 29 01 00 00 48 85 db 74 01 fb 48 8b 44 24 30 <65> 48 2b 05 6e 4b 14 05 0f 85 3a 01 00 00 48 83 c4 38 5b 5d 41 5c
All code
========
   0:	ff                   	(bad)
   1:	ff                   	(bad)
   2:	ff 65 0f             	jmp    *0xf(%rbp)
   5:	c1 05 fd 8b 14 05 83 	roll   $0x83,0x5148bfd(%rip)        # 0x5148c09
   c:	f8                   	clc
   d:	01 0f                	add    %ecx,(%rdi)
   f:	85 3e                	test   %edi,(%rsi)
  11:	01 00                	add    %eax,(%rax)
  13:	00 9c 58 f6 c4 02 0f 	add    %bl,0xf02c4f6(%rax,%rbx,2)
  1a:	85 29                	test   %ebp,(%rcx)
  1c:	01 00                	add    %eax,(%rax)
  1e:	00 48 85             	add    %cl,-0x7b(%rax)
  21:	db 74 01 fb          	(bad)  -0x5(%rcx,%rax,1)
  25:	48 8b 44 24 30       	mov    0x30(%rsp),%rax
  2a:*	65 48 2b 05 6e 4b 14 	sub    %gs:0x5144b6e(%rip),%rax        # 0x5144ba0		<-- trapping instruction
  31:	05 
  32:	0f 85 3a 01 00 00    	jne    0x172
  38:	48 83 c4 38          	add    $0x38,%rsp
  3c:	5b                   	pop    %rbx
  3d:	5d                   	pop    %rbp
  3e:	41 5c                	pop    %r12

Code starting with the faulting instruction
===========================================
   0:	65 48 2b 05 6e 4b 14 	sub    %gs:0x5144b6e(%rip),%rax        # 0x5144b76
   7:	05 
   8:	0f 85 3a 01 00 00    	jne    0x148
   e:	48 83 c4 38          	add    $0x38,%rsp
  12:	5b                   	pop    %rbx
  13:	5d                   	pop    %rbp
  14:	41 5c                	pop    %r12
[   16.044723][    C3] RSP: 0018:ffffc90000787230 EFLAGS: 00000206
[   16.044727][    C3] RAX: a42709e81e9b2d00 RBX: 0000000000000200 RCX: 0000000000000001
[   16.044729][    C3] RDX: 0000000000000000 RSI: ffffffff9a67890a RDI: ffffffff99e53be0
[   16.044730][    C3] RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000001
[   16.044732][    C3] R10: 0000000000000000 R11: ffffffff9ab775e0 R12: 0000000000000002
[   16.044734][    C3] R13: 0000000000000000 R14: 0000000000000000 R15: ffffffff9ab775e0
[ 16.044740][ C3] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:745) 
[ 16.044743][ C3] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5834) 
[ 16.044745][ C3] ? unwind_next_frame (./include/linux/rcupdate.h:331 ./include/linux/rcupdate.h:841 ./include/linux/rcupdate.h:1155 arch/x86/kernel/unwind_orc.c:479) 
[ 16.044749][ C3] unwind_next_frame (./include/linux/rcupdate.h:842 ./include/linux/rcupdate.h:1155 arch/x86/kernel/unwind_orc.c:479) 
[ 16.044752][ C3] ? unwind_next_frame (./include/linux/rcupdate.h:331 ./include/linux/rcupdate.h:841 ./include/linux/rcupdate.h:1155 arch/x86/kernel/unwind_orc.c:479) 
[ 16.044755][ C3] ? __call_rcu_common.constprop.0 (./arch/x86/include/asm/irqflags.h:26 ./arch/x86/include/asm/irqflags.h:109 ./arch/x86/include/asm/irqflags.h:127 kernel/rcu/tree.c:3092) 
[ 16.044759][ C3] ? __pfx_unwind_next_frame (arch/x86/kernel/unwind_orc.c:469) 
[ 16.044763][ C3] ? __call_rcu_common.constprop.0 (./arch/x86/include/asm/irqflags.h:26 ./arch/x86/include/asm/irqflags.h:109 ./arch/x86/include/asm/irqflags.h:127 kernel/rcu/tree.c:3092) 
[ 16.044766][ C3] ? kernel_text_address (kernel/extable.c:99) 
[ 16.044769][ C3] ? __pfx_stack_trace_consume_entry (kernel/stacktrace.c:83) 
[ 16.044772][ C3] arch_stack_walk (arch/x86/kernel/stacktrace.c:24) 
[ 16.044777][ C3] ? __call_rcu_common.constprop.0 (./arch/x86/include/asm/irqflags.h:26 ./arch/x86/include/asm/irqflags.h:109 ./arch/x86/include/asm/irqflags.h:127 kernel/rcu/tree.c:3092) 
[ 16.044782][ C3] stack_trace_save (kernel/stacktrace.c:123) 
[ 16.044784][ C3] ? __pfx_stack_trace_save (kernel/stacktrace.c:114) 
[ 16.044787][ C3] ? rcu_read_lock_any_held (kernel/rcu/update.c:386 kernel/rcu/update.c:380) 
[ 16.044791][ C3] ? validate_chain (kernel/locking/lockdep.c:3804 kernel/locking/lockdep.c:3824 kernel/locking/lockdep.c:3879) 
[ 16.044794][ C3] ? rcu_read_lock_any_held (kernel/rcu/update.c:387 kernel/rcu/update.c:380) 
[ 16.044796][ C3] ? stack_depot_save_flags (lib/stackdepot.c:552 lib/stackdepot.c:619) 
[ 16.044800][ C3] kasan_save_stack (mm/kasan/common.c:48) 
[ 16.044803][ C3] ? kasan_save_stack (mm/kasan/common.c:48) 
[ 16.044806][ C3] ? kasan_record_aux_stack (mm/kasan/generic.c:548) 
[ 16.044808][ C3] ? __call_rcu_common.constprop.0 (./arch/x86/include/asm/irqflags.h:26 ./arch/x86/include/asm/irqflags.h:109 ./arch/x86/include/asm/irqflags.h:127 kernel/rcu/tree.c:3092) 
[ 16.044813][ C3] ? find_held_lock (kernel/locking/lockdep.c:5353) 
[ 16.044818][ C3] ? __lock_acquire (kernel/locking/lockdep.c:5240) 
[ 16.044823][ C3] ? find_held_lock (kernel/locking/lockdep.c:5353) 
[ 16.044827][ C3] ? __virt_addr_valid (./include/linux/rcupdate.h:341 ./include/linux/rcupdate.h:953 ./include/linux/mmzone.h:2126 arch/x86/mm/physaddr.c:65) 
[ 16.044830][ C3] ? __lock_release (kernel/locking/lockdep.c:5539) 
[ 16.044834][ C3] ? __virt_addr_valid (./include/linux/rcupdate.h:341 ./include/linux/rcupdate.h:953 ./include/linux/mmzone.h:2126 arch/x86/mm/physaddr.c:65) 
[ 16.044837][ C3] ? __virt_addr_valid (./arch/x86/include/asm/preempt.h:104 ./include/linux/rcupdate.h:955 ./include/linux/mmzone.h:2126 arch/x86/mm/physaddr.c:65) 
[ 16.044841][ C3] kasan_record_aux_stack (mm/kasan/generic.c:548) 
[ 16.044844][ C3] ? __pfx_free_object_rcu (mm/kmemleak.c:524) 
[ 16.044848][ C3] __call_rcu_common.constprop.0 (./arch/x86/include/asm/irqflags.h:26 ./arch/x86/include/asm/irqflags.h:109 ./arch/x86/include/asm/irqflags.h:127 kernel/rcu/tree.c:3092) 
[ 16.044852][ C3] kmem_cache_free (./include/linux/kmemleak.h:49 mm/slub.c:2305 mm/slub.c:4642 mm/slub.c:4744) 
[ 16.044856][ C3] ? __put_anon_vma (mm/rmap.c:2757) 
[ 16.044861][ C3] __put_anon_vma (mm/rmap.c:2757) 
[ 16.044864][ C3] unlink_anon_vmas (./include/linux/rmap.h:117 mm/rmap.c:444) 
[ 16.044869][ C3] free_pgtables (mm/memory.c:392) 
[ 16.044875][ C3] ? __pfx_free_pgtables (mm/memory.c:349) 
[ 16.044878][ C3] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5834) 
[ 16.044880][ C3] ? exit_mmap (./include/linux/seqlock.h:431 ./include/linux/mmap_lock.h:83 ./include/linux/mmap_lock.h:130 mm/mmap.c:1292) 
[ 16.044885][ C3] ? down_write (./arch/x86/include/asm/preempt.h:104 kernel/locking/rwsem.c:1307 kernel/locking/rwsem.c:1313 kernel/locking/rwsem.c:1578) 
[ 16.044888][ C3] ? __pfx_down_write (kernel/locking/rwsem.c:1575) 
[ 16.044893][ C3] exit_mmap (mm/mmap.c:1297) 
[ 16.044898][ C3] ? __pfx_exit_mmap (mm/mmap.c:1259) 
[ 16.044904][ C3] ? __mutex_unlock_slowpath (./arch/x86/include/asm/atomic64_64.h:101 ./include/linux/atomic/atomic-arch-fallback.h:4329 ./include/linux/atomic/atomic-long.h:1506 ./include/linux/atomic/atomic-instrumented.h:4481 kernel/locking/mutex.c:924) 
[ 16.044912][ C3] mmput (kernel/fork.c:1449 kernel/fork.c:1383 kernel/fork.c:1404) 
[ 16.044916][ C3] exec_mmap (fs/exec.c:954) 
[ 16.044921][ C3] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:745) 
[ 16.044924][ C3] begin_new_exec (fs/exec.c:1204) 
[ 16.044930][ C3] load_elf_binary (fs/binfmt_elf.c:996) 
[ 16.044938][ C3] ? __lock_acquire (kernel/locking/lockdep.c:5240) 
[ 16.044943][ C3] ? find_held_lock (kernel/locking/lockdep.c:5353) 
[ 16.044946][ C3] ? __pfx_load_elf_binary (fs/binfmt_elf.c:818) 
[ 16.044949][ C3] ? exec_binprm (fs/exec.c:1718 fs/exec.c:1750) 
[ 16.044955][ C3] exec_binprm (fs/exec.c:1718 fs/exec.c:1750) 
[ 16.044960][ C3] ? __pfx_exec_binprm (fs/exec.c:1734) 
[ 16.044963][ C3] ? bprm_execve (fs/exec.c:1792 fs/exec.c:1778) 
[ 16.044969][ C3] bprm_execve (fs/exec.c:1802 fs/exec.c:1778) 
[ 16.044973][ C3] do_execveat_common.isra.0 (fs/exec.c:1908) 
[ 16.044978][ C3] __x64_sys_execve (fs/exec.c:2053) 
[ 16.044982][ C3] do_syscall_64 (arch/x86/entry/syscall_64.c:63 arch/x86/entry/syscall_64.c:94) 
[ 16.044986][ C3] entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:130) 
[   16.044989][    C3] RIP: 0033:0x7fb0db6d140b
[ 16.044996][ C3] Code: Unable to access opcode bytes at 0x7fb0db6d13e1.

Code starting with the faulting instruction
===========================================
[   16.044997][    C3] RSP: 002b:00007ffe7f8e7ac8 EFLAGS: 00000246 ORIG_RAX: 000000000000003b
[   16.045000][    C3] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007fb0db6d140b
[   16.045002][    C3] RDX: 000055dc0710b640 RSI: 000055dc070fed90 RDI: 000055dc07118a00
[   16.045003][    C3] RBP: 000055dc07118a00 R08: 000055dc070f34d0 R09: 0000000000000020
[   16.045005][    C3] R10: 00000000000001b6 R11: 0000000000000246 R12: 00000000ffffffff
[   16.045007][    C3] R13: 000055dc070fed90 R14: 000055dc0710b640 R15: 000055dc070fa660
| [   16.077490][    C3] RCU nest depth: 1, expected: 0
| [   16.077697][    C3] INFO: lockdep is turned off.
| [   16.077900][    C3] Preemption disabled at:
| [ 16.077902][ C3] handle_softirqs (kernel/softirq.c:553) 
[   16.078463][    C3] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[   16.078465][    C3] Call Trace:
[   16.078467][    C3]  <IRQ>
[ 16.078469][ C3] dump_stack_lvl (lib/dump_stack.c:123) 
[ 16.078476][ C3] __might_resched (kernel/sched/core.c:8796) 
[ 16.078482][ C3] down_write (./include/linux/kernel.h:73 kernel/locking/rwsem.c:1576) 
[ 16.078487][ C3] ? __pfx_down_write (kernel/locking/rwsem.c:1575) 
[ 16.078490][ C3] ? simple_recursive_removal (fs/libfs.c:614) 
[ 16.078494][ C3] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:745) 
[ 16.078499][ C3] ? do_raw_spin_unlock (./arch/x86/include/asm/atomic.h:23 ./include/linux/atomic/atomic-arch-fallback.h:457 ./include/linux/atomic/atomic-instrumented.h:33 ./include/asm-generic/qspinlock.h:57 kernel/locking/spinlock_debug.c:101 kernel/locking/spinlock_debug.c:141) 
[ 16.078505][ C3] simple_recursive_removal (./include/linux/dcache.h:409 ./include/linux/dcache.h:424 ./include/linux/dcache.h:434 fs/libfs.c:617) 
[ 16.078508][ C3] ? do_raw_spin_unlock (./arch/x86/include/asm/atomic.h:23 ./include/linux/atomic/atomic-arch-fallback.h:457 ./include/linux/atomic/atomic-instrumented.h:33 ./include/asm-generic/qspinlock.h:57 kernel/locking/spinlock_debug.c:101 kernel/locking/spinlock_debug.c:141) 
[ 16.078511][ C3] ? __pfx_remove_one (fs/debugfs/inode.c:780) 
[ 16.078516][ C3] debugfs_remove (fs/debugfs/inode.c:806 fs/debugfs/inode.c:799) 
[ 16.078519][ C3] ref_tracker_dir_exit (lib/ref_tracker.c:412 lib/ref_tracker.c:196) 
[ 16.078525][ C3] ? __pfx_ref_tracker_free (lib/ref_tracker.c:254) 
[ 16.078529][ 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) 
[ 16.078534][ C3] ? rcu_do_batch (kernel/rcu/tree.c:2576) 
[ 16.078537][ C3] ? __pfx_ref_tracker_dir_exit (lib/ref_tracker.c:190) 
[ 16.078541][ C3] ? irq_exit_rcu (kernel/softirq.c:698) 
[ 16.078543][ C3] ? sysvec_apic_timer_interrupt (arch/x86/kernel/apic/apic.c:1050 arch/x86/kernel/apic/apic.c:1050) 
[ 16.078548][ C3] ? asm_sysvec_apic_timer_interrupt (./arch/x86/include/asm/idtentry.h:702) 
[ 16.078552][ C3] ? lock_acquire.part.0 (kernel/locking/lockdep.c:5875) 
[ 16.078555][ C3] ? unwind_next_frame (./include/linux/rcupdate.h:842 ./include/linux/rcupdate.h:1155 arch/x86/kernel/unwind_orc.c:479) 
[ 16.078559][ C3] ? arch_stack_walk (arch/x86/kernel/stacktrace.c:24) 
[ 16.078563][ C3] ? stack_trace_save (kernel/stacktrace.c:123) 
[ 16.078566][ C3] ? kasan_save_stack (mm/kasan/common.c:48) 
[ 16.078570][ C3] ? kasan_record_aux_stack (mm/kasan/generic.c:548) 
[ 16.078574][ C3] ? __call_rcu_common.constprop.0 (./arch/x86/include/asm/irqflags.h:26 ./arch/x86/include/asm/irqflags.h:109 ./arch/x86/include/asm/irqflags.h:127 kernel/rcu/tree.c:3092) 
[ 16.078578][ C3] ? kmem_cache_free (./include/linux/kmemleak.h:49 mm/slub.c:2305 mm/slub.c:4642 mm/slub.c:4744) 
[ 16.078585][ C3] __put_net (net/core/net_namespace.c:732) 
[ 16.078589][ C3] __sk_destruct (./include/net/net_namespace.h:288 ./include/net/net_namespace.h:390 net/core/sock.c:2376) 
[ 16.078593][ C3] ? rcu_do_batch (kernel/rcu/tree.c:2576) 
[ 16.078595][ C3] rcu_do_batch (kernel/rcu/tree.c:2576) 
[ 16.078599][ C3] ? find_held_lock (kernel/locking/lockdep.c:5353) 
[ 16.078605][ C3] ? __pfx_rcu_do_batch (kernel/rcu/tree.c:2500) 
[ 16.078608][ C3] ? _raw_spin_unlock_irqrestore (./include/linux/spinlock_api_smp.h:151 kernel/locking/spinlock.c:194) 
[ 16.078613][ C3] ? lockdep_hardirqs_on (kernel/locking/lockdep.c:4475) 
[ 16.078616][ C3] ? _raw_spin_unlock_irqrestore (./arch/x86/include/asm/preempt.h:104 ./include/linux/spinlock_api_smp.h:152 kernel/locking/spinlock.c:194) 
[ 16.078620][ C3] rcu_core (kernel/rcu/tree.c:2834) 
[ 16.078624][ C3] handle_softirqs (kernel/softirq.c:579) 
[ 16.078629][ C3] __irq_exit_rcu (kernel/softirq.c:614 kernel/softirq.c:453 kernel/softirq.c:680) 
[ 16.078632][ C3] irq_exit_rcu (kernel/softirq.c:698) 
[ 16.078635][ C3] sysvec_apic_timer_interrupt (arch/x86/kernel/apic/apic.c:1050 arch/x86/kernel/apic/apic.c:1050) 
[   16.078639][    C3]  </IRQ>
[   16.078640][    C3]  <TASK>
[ 16.078641][ C3] asm_sysvec_apic_timer_interrupt (./arch/x86/include/asm/idtentry.h:702) 
[ 16.078644][ C3] RIP: 0010:lock_acquire.part.0 (kernel/locking/lockdep.c:5875) 
[ 16.078648][ C3] Code: ff ff ff 65 0f c1 05 fd 8b 14 05 83 f8 01 0f 85 3e 01 00 00 9c 58 f6 c4 02 0f 85 29 01 00 00 48 85 db 74 01 fb 48 8b 44 24 30 <65> 48 2b 05 6e 4b 14 05 0f 85 3a 01 00 00 48 83 c4 38 5b 5d 41 5c
All code
========
   0:	ff                   	(bad)
   1:	ff                   	(bad)
   2:	ff 65 0f             	jmp    *0xf(%rbp)
   5:	c1 05 fd 8b 14 05 83 	roll   $0x83,0x5148bfd(%rip)        # 0x5148c09
   c:	f8                   	clc
   d:	01 0f                	add    %ecx,(%rdi)
   f:	85 3e                	test   %edi,(%rsi)
  11:	01 00                	add    %eax,(%rax)
  13:	00 9c 58 f6 c4 02 0f 	add    %bl,0xf02c4f6(%rax,%rbx,2)
  1a:	85 29                	test   %ebp,(%rcx)
  1c:	01 00                	add    %eax,(%rax)
  1e:	00 48 85             	add    %cl,-0x7b(%rax)
  21:	db 74 01 fb          	(bad)  -0x5(%rcx,%rax,1)
  25:	48 8b 44 24 30       	mov    0x30(%rsp),%rax
  2a:*	65 48 2b 05 6e 4b 14 	sub    %gs:0x5144b6e(%rip),%rax        # 0x5144ba0		<-- trapping instruction
  31:	05 
  32:	0f 85 3a 01 00 00    	jne    0x172
  38:	48 83 c4 38          	add    $0x38,%rsp
  3c:	5b                   	pop    %rbx
  3d:	5d                   	pop    %rbp
  3e:	41 5c                	pop    %r12

Code starting with the faulting instruction
===========================================
   0:	65 48 2b 05 6e 4b 14 	sub    %gs:0x5144b6e(%rip),%rax        # 0x5144b76
   7:	05 
   8:	0f 85 3a 01 00 00    	jne    0x148
   e:	48 83 c4 38          	add    $0x38,%rsp
  12:	5b                   	pop    %rbx
  13:	5d                   	pop    %rbp
  14:	41 5c                	pop    %r12
[   16.078650][    C3] RSP: 0018:ffffc90000787230 EFLAGS: 00000206
[   16.078654][    C3] RAX: a42709e81e9b2d00 RBX: 0000000000000200 RCX: 0000000000000001
[   16.078656][    C3] RDX: 0000000000000000 RSI: ffffffff9a67890a RDI: ffffffff99e53be0
[   16.078657][    C3] RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000001
[   16.078659][    C3] R10: 0000000000000000 R11: ffffffff9ab775e0 R12: 0000000000000002
[   16.078660][    C3] R13: 0000000000000000 R14: 0000000000000000 R15: ffffffff9ab775e0
[ 16.078666][ C3] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:745) 
[ 16.078669][ C3] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5834) 
[ 16.078672][ C3] ? unwind_next_frame (./include/linux/rcupdate.h:331 ./include/linux/rcupdate.h:841 ./include/linux/rcupdate.h:1155 arch/x86/kernel/unwind_orc.c:479) 
[ 16.078676][ C3] unwind_next_frame (./include/linux/rcupdate.h:842 ./include/linux/rcupdate.h:1155 arch/x86/kernel/unwind_orc.c:479) 
[ 16.078678][ C3] ? unwind_next_frame (./include/linux/rcupdate.h:331 ./include/linux/rcupdate.h:841 ./include/linux/rcupdate.h:1155 arch/x86/kernel/unwind_orc.c:479) 
[ 16.078681][ C3] ? __call_rcu_common.constprop.0 (./arch/x86/include/asm/irqflags.h:26 ./arch/x86/include/asm/irqflags.h:109 ./arch/x86/include/asm/irqflags.h:127 kernel/rcu/tree.c:3092) 
[ 16.078685][ C3] ? __pfx_unwind_next_frame (arch/x86/kernel/unwind_orc.c:469) 
[ 16.078689][ C3] ? __call_rcu_common.constprop.0 (./arch/x86/include/asm/irqflags.h:26 ./arch/x86/include/asm/irqflags.h:109 ./arch/x86/include/asm/irqflags.h:127 kernel/rcu/tree.c:3092) 
[ 16.078692][ C3] ? kernel_text_address (kernel/extable.c:99) 
[ 16.078695][ C3] ? __pfx_stack_trace_consume_entry (kernel/stacktrace.c:83) 
[ 16.078699][ C3] arch_stack_walk (arch/x86/kernel/stacktrace.c:24) 
[ 16.078704][ C3] ? __call_rcu_common.constprop.0 (./arch/x86/include/asm/irqflags.h:26 ./arch/x86/include/asm/irqflags.h:109 ./arch/x86/include/asm/irqflags.h:127 kernel/rcu/tree.c:3092) 
[ 16.078708][ C3] stack_trace_save (kernel/stacktrace.c:123) 
[ 16.078711][ C3] ? __pfx_stack_trace_save (kernel/stacktrace.c:114) 
[ 16.078714][ C3] ? rcu_read_lock_any_held (kernel/rcu/update.c:386 kernel/rcu/update.c:380) 
[ 16.078717][ C3] ? validate_chain (kernel/locking/lockdep.c:3804 kernel/locking/lockdep.c:3824 kernel/locking/lockdep.c:3879) 
[ 16.078720][ C3] ? rcu_read_lock_any_held (kernel/rcu/update.c:387 kernel/rcu/update.c:380) 
[ 16.078723][ C3] ? stack_depot_save_flags (lib/stackdepot.c:552 lib/stackdepot.c:619) 
[ 16.078727][ C3] kasan_save_stack (mm/kasan/common.c:48) 
[ 16.078730][ C3] ? kasan_save_stack (mm/kasan/common.c:48) 
[ 16.078732][ C3] ? kasan_record_aux_stack (mm/kasan/generic.c:548) 
[ 16.078735][ C3] ? __call_rcu_common.constprop.0 (./arch/x86/include/asm/irqflags.h:26 ./arch/x86/include/asm/irqflags.h:109 ./arch/x86/include/asm/irqflags.h:127 kernel/rcu/tree.c:3092) 
[ 16.078740][ C3] ? find_held_lock (kernel/locking/lockdep.c:5353) 
[ 16.078745][ C3] ? __lock_acquire (kernel/locking/lockdep.c:5240) 
[ 16.078750][ C3] ? find_held_lock (kernel/locking/lockdep.c:5353) 
[ 16.078753][ C3] ? __virt_addr_valid (./include/linux/rcupdate.h:341 ./include/linux/rcupdate.h:953 ./include/linux/mmzone.h:2126 arch/x86/mm/physaddr.c:65) 
[ 16.078757][ C3] ? __lock_release (kernel/locking/lockdep.c:5539) 
[ 16.078760][ C3] ? __virt_addr_valid (./include/linux/rcupdate.h:341 ./include/linux/rcupdate.h:953 ./include/linux/mmzone.h:2126 arch/x86/mm/physaddr.c:65) 
[ 16.078764][ C3] ? __virt_addr_valid (./arch/x86/include/asm/preempt.h:104 ./include/linux/rcupdate.h:955 ./include/linux/mmzone.h:2126 arch/x86/mm/physaddr.c:65) 
[ 16.078768][ C3] kasan_record_aux_stack (mm/kasan/generic.c:548) 
[ 16.078770][ C3] ? __pfx_free_object_rcu (mm/kmemleak.c:524) 
[ 16.078775][ C3] __call_rcu_common.constprop.0 (./arch/x86/include/asm/irqflags.h:26 ./arch/x86/include/asm/irqflags.h:109 ./arch/x86/include/asm/irqflags.h:127 kernel/rcu/tree.c:3092) 
[ 16.078779][ C3] kmem_cache_free (./include/linux/kmemleak.h:49 mm/slub.c:2305 mm/slub.c:4642 mm/slub.c:4744) 
[ 16.078782][ C3] ? __put_anon_vma (mm/rmap.c:2757) 
[ 16.078787][ C3] __put_anon_vma (mm/rmap.c:2757) 
[ 16.078790][ C3] unlink_anon_vmas (./include/linux/rmap.h:117 mm/rmap.c:444) 
[ 16.078795][ C3] free_pgtables (mm/memory.c:392) 
[ 16.078802][ C3] ? __pfx_free_pgtables (mm/memory.c:349) 
[ 16.078804][ C3] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5834) 
[ 16.078807][ C3] ? exit_mmap (./include/linux/seqlock.h:431 ./include/linux/mmap_lock.h:83 ./include/linux/mmap_lock.h:130 mm/mmap.c:1292) 
[ 16.078812][ C3] ? down_write (./arch/x86/include/asm/preempt.h:104 kernel/locking/rwsem.c:1307 kernel/locking/rwsem.c:1313 kernel/locking/rwsem.c:1578) 
[ 16.078815][ C3] ? __pfx_down_write (kernel/locking/rwsem.c:1575) 
[ 16.078820][ C3] exit_mmap (mm/mmap.c:1297) 
[ 16.078825][ C3] ? __pfx_exit_mmap (mm/mmap.c:1259) 
[ 16.078831][ C3] ? __mutex_unlock_slowpath (./arch/x86/include/asm/atomic64_64.h:101 ./include/linux/atomic/atomic-arch-fallback.h:4329 ./include/linux/atomic/atomic-long.h:1506 ./include/linux/atomic/atomic-instrumented.h:4481 kernel/locking/mutex.c:924) 
[ 16.078839][ C3] mmput (kernel/fork.c:1449 kernel/fork.c:1383 kernel/fork.c:1404) 
[ 16.078843][ C3] exec_mmap (fs/exec.c:954) 
[ 16.078848][ C3] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:745) 
[ 16.078852][ C3] begin_new_exec (fs/exec.c:1204) 
[ 16.078858][ C3] load_elf_binary (fs/binfmt_elf.c:996) 
[ 16.078864][ C3] ? __lock_acquire (kernel/locking/lockdep.c:5240) 
[ 16.078869][ C3] ? find_held_lock (kernel/locking/lockdep.c:5353) 
[ 16.078873][ C3] ? __pfx_load_elf_binary (fs/binfmt_elf.c:818) 
[ 16.078876][ C3] ? exec_binprm (fs/exec.c:1718 fs/exec.c:1750) 
[ 16.078882][ C3] exec_binprm (fs/exec.c:1718 fs/exec.c:1750) 
[ 16.078887][ C3] ? __pfx_exec_binprm (fs/exec.c:1734) 
[ 16.078890][ C3] ? bprm_execve (fs/exec.c:1792 fs/exec.c:1778) 
[ 16.078896][ C3] bprm_execve (fs/exec.c:1802 fs/exec.c:1778) 
[ 16.078900][ C3] do_execveat_common.isra.0 (fs/exec.c:1908) 
[ 16.078906][ C3] __x64_sys_execve (fs/exec.c:2053) 
[ 16.078910][ C3] do_syscall_64 (arch/x86/entry/syscall_64.c:63 arch/x86/entry/syscall_64.c:94) 
[ 16.078914][ C3] entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:130) 
[   16.078916][    C3] RIP: 0033:0x7fb0db6d140b
[ 16.078922][ C3] Code: Unable to access opcode bytes at 0x7fb0db6d13e1.

Code starting with the faulting instruction
===========================================
[   16.078924][    C3] RSP: 002b:00007ffe7f8e7ac8 EFLAGS: 00000246 ORIG_RAX: 000000000000003b
[   16.078926][    C3] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007fb0db6d140b
[   16.078928][    C3] RDX: 000055dc0710b640 RSI: 000055dc070fed90 RDI: 000055dc07118a00
[   16.078930][    C3] RBP: 000055dc07118a00 R08: 000055dc070f34d0 R09: 0000000000000020
[   16.078931][    C3] R10: 00000000000001b6 R11: 0000000000000246 R12: 00000000ffffffff
[   16.078933][    C3] R13: 000055dc070fed90 R14: 000055dc0710b640 R15: 000055dc070fa660
| [   18.331516][    C2] INFO: lockdep is turned off.
| [   18.331702][    C2] Preemption disabled at:
| [ 18.331704][ C2] copy_fpstate_to_sigframe (./include/linux/instrumented.h:68 ./include/asm-generic/bitops/instrumented-non-atomic.h:141 ./include/linux/thread_info.h:126 arch/x86/kernel/fpu/signal.c:214) 
| [   18.332127][    C2] Tainted: [W]=WARN
[   18.332129][    C2] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[   18.332131][    C2] Call Trace:
[   18.332133][    C2]  <IRQ>
[ 18.332134][ C2] dump_stack_lvl (lib/dump_stack.c:123) 
[ 18.332143][ C2] __might_resched (kernel/sched/core.c:8796) 
[ 18.332150][ C2] down_write (./include/linux/kernel.h:73 kernel/locking/rwsem.c:1576) 
[ 18.332154][ C2] ? __pfx_down_write (kernel/locking/rwsem.c:1575) 
[ 18.332157][ C2] ? simple_recursive_removal (fs/libfs.c:614) 
[ 18.332162][ C2] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:745) 
[ 18.332166][ C2] ? do_raw_spin_unlock (./arch/x86/include/asm/atomic.h:23 ./include/linux/atomic/atomic-arch-fallback.h:457 ./include/linux/atomic/atomic-instrumented.h:33 ./include/asm-generic/qspinlock.h:57 kernel/locking/spinlock_debug.c:101 kernel/locking/spinlock_debug.c:141) 
[ 18.332172][ C2] simple_recursive_removal (./include/linux/dcache.h:409 ./include/linux/dcache.h:424 ./include/linux/dcache.h:434 fs/libfs.c:617) 
[ 18.332175][ C2] ? do_raw_spin_unlock (./arch/x86/include/asm/atomic.h:23 ./include/linux/atomic/atomic-arch-fallback.h:457 ./include/linux/atomic/atomic-instrumented.h:33 ./include/asm-generic/qspinlock.h:57 kernel/locking/spinlock_debug.c:101 kernel/locking/spinlock_debug.c:141) 
[ 18.332178][ C2] ? __pfx_remove_one (fs/debugfs/inode.c:780) 
[ 18.332184][ C2] debugfs_remove (fs/debugfs/inode.c:806 fs/debugfs/inode.c:799) 
[ 18.332187][ C2] ref_tracker_dir_exit (lib/ref_tracker.c:412 lib/ref_tracker.c:196) 
[ 18.332192][ C2] ? __pfx_ref_tracker_free (lib/ref_tracker.c:254) 
[ 18.332196][ C2] ? __sk_destruct (./include/linux/instrumented.h:96 ./include/linux/atomic/atomic-instrumented.h:400 ./include/linux/refcount.h:389 ./include/linux/refcount.h:432 ./include/linux/refcount.h:450 ./include/net/net_namespace.h:287 ./include/net/net_namespace.h:390 net/core/sock.c:2376) 
[ 18.332201][ C2] ? rcu_do_batch (kernel/rcu/tree.c:2576) 
[ 18.332204][ C2] ? __pfx_ref_tracker_dir_exit (lib/ref_tracker.c:190) 
[ 18.332207][ C2] ? __local_bh_enable_ip (kernel/softirq.c:407) 
[ 18.332213][ C2] ? copy_fpstate_to_sigframe (arch/x86/kernel/fpu/signal.c:222) 
[ 18.332216][ C2] ? get_sigframe (arch/x86/kernel/signal.c:163) 
[ 18.332224][ C2] ? x64_setup_rt_frame (./arch/x86/include/asm/bitops.h:206 ./arch/x86/include/asm/bitops.h:238 arch/x86/kernel/signal_64.c:153 arch/x86/kernel/signal_64.c:176) 
[ 18.332228][ C2] ? handle_signal (arch/x86/kernel/signal.c:250 arch/x86/kernel/signal.c:294) 
[ 18.332231][ C2] ? arch_do_signal_or_restart (arch/x86/kernel/signal.c:340) 
[ 18.332234][ C2] ? exit_to_user_mode_loop (kernel/entry/common.c:113) 
[ 18.332238][ C2] ? do_syscall_64 (./include/linux/entry-common.h:330 ./include/linux/entry-common.h:414 ./include/linux/entry-common.h:449 arch/x86/entry/syscall_64.c:100) 
[ 18.332242][ C2] ? entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:130) 
[ 18.332246][ C2] ? bpf_sk_storage_free (./include/linux/rcupdate.h:341 ./include/linux/rcupdate.h:871 net/core/bpf_sk_storage.c:61) 
[ 18.332250][ C2] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:745) 
[ 18.332254][ C2] __put_net (net/core/net_namespace.c:732) 
[ 18.332258][ C2] __sk_destruct (./include/net/net_namespace.h:288 ./include/net/net_namespace.h:390 net/core/sock.c:2376) 
[ 18.332262][ C2] ? rcu_do_batch (kernel/rcu/tree.c:2576) 
[ 18.332265][ C2] rcu_do_batch (kernel/rcu/tree.c:2576) 
[ 18.332269][ C2] ? __pfx_rcu_do_batch (kernel/rcu/tree.c:2500) 
[ 18.332273][ C2] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:745) 
[ 18.332276][ C2] ? trace_irq_enable.constprop.0 (./include/trace/events/preemptirq.h:40) 
[ 18.332283][ C2] rcu_core (kernel/rcu/tree.c:2834) 
[ 18.332288][ C2] handle_softirqs (kernel/softirq.c:579) 
[ 18.332292][ C2] ? copy_fpstate_to_sigframe (./include/linux/bottom_half.h:33 ./arch/x86/include/asm/fpu/api.h:77 arch/x86/kernel/fpu/signal.c:220) 
[ 18.332296][ C2] do_softirq (kernel/softirq.c:480 kernel/softirq.c:467) 
[   18.332299][    C2]  </IRQ>
[   18.332300][    C2]  <TASK>
[ 18.332301][ C2] __local_bh_enable_ip (kernel/softirq.c:407) 
[ 18.332304][ C2] copy_fpstate_to_sigframe (arch/x86/kernel/fpu/signal.c:222) 
[ 18.332308][ C2] ? fpu__alloc_mathframe (arch/x86/kernel/fpu/signal.c:493) 
[ 18.332311][ C2] get_sigframe (arch/x86/kernel/signal.c:163) 
[ 18.332314][ C2] ? trace_irq_enable.constprop.0 (./include/trace/events/preemptirq.h:40) 
[ 18.332319][ C2] ? __pfx_get_sigframe (arch/x86/kernel/signal.c:96) 
[ 18.332323][ C2] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:745) 
[ 18.332326][ C2] ? trace_rseq_update (./include/trace/events/rseq.h:11 (discriminator 21)) 
[ 18.332333][ C2] x64_setup_rt_frame (./arch/x86/include/asm/bitops.h:206 ./arch/x86/include/asm/bitops.h:238 arch/x86/kernel/signal_64.c:153 arch/x86/kernel/signal_64.c:176) 
[ 18.332337][ C2] ? __pfx___rseq_handle_notify_resume (kernel/rseq.c:425) 
[ 18.332341][ C2] ? __pfx_x64_setup_rt_frame (arch/x86/kernel/signal_64.c:165) 
[ 18.332347][ C2] handle_signal (arch/x86/kernel/signal.c:250 arch/x86/kernel/signal.c:294) 
[ 18.332352][ C2] arch_do_signal_or_restart (arch/x86/kernel/signal.c:340) 
[ 18.332358][ C2] ? __pfx_arch_do_signal_or_restart (arch/x86/kernel/signal.c:334) 
[ 18.332364][ C2] ? __x64_sys_rt_sigsuspend (kernel/signal.c:4858 kernel/signal.c:4848 kernel/signal.c:4848) 
[ 18.332368][ C2] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:745) 
[ 18.332372][ C2] exit_to_user_mode_loop (kernel/entry/common.c:113) 
[ 18.332375][ C2] do_syscall_64 (./include/linux/entry-common.h:330 ./include/linux/entry-common.h:414 ./include/linux/entry-common.h:449 arch/x86/entry/syscall_64.c:100) 
[ 18.332379][ C2] entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:130) 
[   18.332381][    C2] RIP: 0033:0x7f7cc025406c
[ 18.332387][ C2] Code: Unable to access opcode bytes at 0x7f7cc0254042.

Code starting with the faulting instruction
===========================================
[   18.332389][    C2] RSP: 002b:00007ffdbbb0a838 EFLAGS: 00000246 ORIG_RAX: 0000000000000082
[   18.332393][    C2] RAX: fffffffffffffffc RBX: 00007ffdbbb0a878 RCX: 00007f7cc025406c
[   18.332396][    C2] RDX: 0000000000000001 RSI: 0000000000000008 RDI: 00007ffdbbb0a8a0
[   18.332397][    C2] RBP: 00007ffdbbb0a920 R08: 00007ffdbbb0a920 R09: 0000000000000000
[   18.332399][    C2] R10: 0000000000000000 R11: 0000000000000246 R12: 00007ffdbbb0a8a0


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