======================================
| [ 215.450208][ T2181] #0: ffffffffa99b8650 (pernet_ops_rwsem){++++}-{3:3}, at: rtnl_link_unregister (net/core/rtnetlink.c:671 net/core/rtnetlink.c:694) 
| [ 215.450465][ T2181] #1: ffffffffa99d3948 (rtnl_mutex){+.+.}-{3:3}, at: rtnl_link_unregister (./include/linux/instrumented.h:68 ./include/linux/atomic/atomic-instrumented.h:32 net/core/rtnetlink.c:677 net/core/rtnetlink.c:694) 
| [  215.450685][ T2181]
| [  215.450685][ T2181] stack backtrace:
[  215.451029][ T2181] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[  215.451305][ T2181] Call Trace:
[  215.451416][ T2181]  <TASK>
[ 215.451482][ T2181] dump_stack_lvl (lib/dump_stack.c:123) 
[ 215.451611][ T2181] print_circular_bug (kernel/locking/lockdep.c:2077) 
[ 215.451734][ T2181] check_noncircular (kernel/locking/lockdep.c:2206) 
[ 215.451862][ T2181] ? __pfx_check_noncircular (kernel/locking/lockdep.c:2182) 
[ 215.451993][ T2181] ? __kernel_text_address (kernel/extable.c:79) 
[ 215.452122][ T2181] ? unwind_get_return_address (arch/x86/kernel/unwind_orc.c:369 arch/x86/kernel/unwind_orc.c:364) 
[ 215.452248][ T2181] ? __pfx_stack_trace_consume_entry (kernel/stacktrace.c:83) 
[ 215.452416][ T2181] ? arch_stack_walk (arch/x86/kernel/stacktrace.c:26) 
[ 215.452547][ T2181] ? alloc_chain_hlocks (kernel/locking/lockdep.c:3528) 
[ 215.452683][ T2181] check_prev_add (kernel/locking/lockdep.c:3162) 
[ 215.452808][ T2181] ? __pfx_stack_trace_save (kernel/stacktrace.c:114) 
[ 215.452936][ T2181] validate_chain (kernel/locking/lockdep.c:3281 kernel/locking/lockdep.c:3904) 
[ 215.453067][ T2181] ? __pfx_validate_chain (kernel/locking/lockdep.c:3860) 
[ 215.453193][ T2181] ? mark_lock (kernel/locking/lockdep.c:186 kernel/locking/lockdep.c:4731) 
[ 215.453318][ T2181] ? __pfx_validate_chain (kernel/locking/lockdep.c:3860) 
[ 215.453447][ T2181] __lock_acquire (kernel/locking/lockdep.c:5202) 
[ 215.453591][ T2181] lock_sync (kernel/locking/lockdep.c:467 kernel/locking/lockdep.c:5876) 
[ 215.453687][ T2181] ? __synchronize_srcu (kernel/rcu/srcutree.c:1383) 
[ 215.453816][ T2181] __synchronize_srcu (kernel/rcu/srcutree.c:1388) 
[ 215.453944][ T2181] ? __pfx___synchronize_srcu (kernel/rcu/srcutree.c:1383) 
[ 215.454071][ T2181] ? hlock_class (./arch/x86/include/asm/bitops.h:227 ./arch/x86/include/asm/bitops.h:239 ./include/asm-generic/bitops/instrumented-non-atomic.h:142 kernel/locking/lockdep.c:228) 
[ 215.454199][ T2181] ? mark_lock (kernel/locking/lockdep.c:4703 (discriminator 3)) 
[ 215.454301][ T2181] ? kvm_clock_get_cycles (./arch/x86/include/asm/preempt.h:94 arch/x86/kernel/kvmclock.c:80 arch/x86/kernel/kvmclock.c:86) 
[ 215.454432][ T2181] ? ktime_get_mono_fast_ns (kernel/time/timekeeping.c:195 kernel/time/timekeeping.c:395 kernel/time/timekeeping.c:449 kernel/time/timekeeping.c:489) 
[ 215.454563][ T2181] ? lockdep_hardirqs_on_prepare (kernel/locking/lockdep.c:4347 kernel/locking/lockdep.c:4406) 
[ 215.454733][ T2181] __rtnl_link_unregister (net/core/rtnetlink.c:657) 
[ 215.454860][ T2181] ? mark_lock (kernel/locking/lockdep.c:4703 (discriminator 3)) 
[ 215.454958][ T2181] ? __pfx___rtnl_link_unregister (net/core/rtnetlink.c:652) 
[ 215.455115][ T2181] ? mark_held_locks (kernel/locking/lockdep.c:4321) 
[ 215.455245][ T2181] rtnl_link_unregister (net/core/rtnetlink.c:152 net/core/rtnetlink.c:696) 
[ 215.455375][ T2181] ? __pfx_rtnl_link_unregister (net/core/rtnetlink.c:691) 
[ 215.455509][ T2181] ? __pfx_woken_wake_function (kernel/sched/wait.c:439) 
[ 215.455636][ T2181] nsim_module_exit (drivers/net/netdevsim/netdev.c:99) netdevsim
[ 215.455774][ T2181] __do_sys_delete_module (kernel/module/main.c:757) 
[ 215.455901][ T2181] ? __pfx___do_sys_delete_module (kernel/module/main.c:702) 
[ 215.456143][ T2181] ? __pfx_slab_free_after_rcu_debug (mm/slub.c:4609) 
[ 215.456301][ T2181] ? __pfx_slab_free_after_rcu_debug (mm/slub.c:4609) 
[ 215.456461][ T2181] ? trace_rcu_segcb_stats (./arch/x86/include/asm/bitops.h:227 ./arch/x86/include/asm/bitops.h:239 ./include/asm-generic/bitops/instrumented-non-atomic.h:142 ./include/linux/cpumask.h:570 ./include/linux/cpumask.h:1117 ./include/trace/events/rcu.h:537) 
[ 215.456596][ T2181] ? __pfx_slab_free_after_rcu_debug (mm/slub.c:4609) 
[ 215.456762][ T2181] ? lockdep_hardirqs_on_prepare (kernel/locking/lockdep.c:4347 kernel/locking/lockdep.c:4406) 
[ 215.457012][ T2181] do_syscall_64 (arch/x86/entry/common.c:52 arch/x86/entry/common.c:83) 
[ 215.457140][ T2181] entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:130) 
[  215.457296][ T2181] RIP: 0033:0x7f6973fb45ab
[ 215.457425][ T2181] Code: 73 01 c3 48 8b 0d 55 98 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 b0 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 8b 0d 25 98 1b 00 f7 d8 64 89 01 48
All code
========
   0:	73 01                	jae    0x3
   2:	c3                   	ret
   3:	48 8b 0d 55 98 1b 00 	mov    0x1b9855(%rip),%rcx        # 0x1b985f
   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 b0 00 00 00       	mov    $0xb0,%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 25 98 1b 00 	mov    0x1b9825(%rip),%rcx        # 0x1b985f
  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 25 98 1b 00 	mov    0x1b9825(%rip),%rcx        # 0x1b9835
  10:	f7 d8                	neg    %eax
  12:	64 89 01             	mov    %eax,%fs:(%rcx)
  15:	48                   	rex.W
[  215.457940][ T2181] RSP: 002b:00007fffa5c9b2e8 EFLAGS: 00000206 ORIG_RAX: 00000000000000b0
[  215.458129][ T2181] RAX: ffffffffffffffda RBX: 00005588bb025980 RCX: 00007f6973fb45ab
[  215.458388][ T2181] RDX: 0000000000000000 RSI: 0000000000000800 RDI: 00005588bb0259e8
[  215.458575][ T2181] RBP: 00005588bb025980 R08: 0000000000000000 R09: 0000000000000000
[  215.458764][ T2181] R10: 00007f6974113ac0 R11: 0000000000000206 R12: 00005588bb0259e8


Finger prints:
print_circular_bug:check_noncircular:check_prev_add:validate_chain:__lock_acquire