======================================
| [ 32.053439][ T354] #0: ffffffffa8e01dc8 (rtnl_mutex){+.+.}-{4:4}, at: rtnl_dellink (net/core/rtnetlink.c:3512)
| [ 32.053707][ T354] #1: ffffffffa8df0a70 ((netdev_chain).rwsem){++++}-{4:4}, at: blocking_notifier_call_chain (kernel/notifier.c:380 kernel/notifier.c:368)
| [   32.054005][  T354]
| [   32.054005][  T354] stack backtrace:
[   32.054427][  T354] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[   32.054610][  T354] Call Trace:
[   32.054725][  T354]  <TASK>
[ 32.054804][ T354] dump_stack_lvl (lib/dump_stack.c:123)
[ 32.054965][ T354] print_deadlock_bug (kernel/locking/lockdep.c:3040)
[ 32.055117][ T354] validate_chain (kernel/locking/lockdep.c:3894)
[ 32.055271][ T354] ? __pfx_validate_chain (kernel/locking/lockdep.c:3860)
[ 32.055420][ T354] ? 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)
[ 32.055576][ T354] ? mark_lock (kernel/locking/lockdep.c:4727 (discriminator 3))
[ 32.055691][ T354] __lock_acquire (kernel/locking/lockdep.c:5226)
[ 32.055850][ T354] lock_acquire.part.0 (kernel/locking/lockdep.c:467 kernel/locking/lockdep.c:5851)
[ 32.055997][ T354] ? blocking_notifier_call_chain (kernel/notifier.c:380 kernel/notifier.c:368)
[ 32.056185][ T354] ? __kasan_slab_free (mm/kasan/common.c:271)
[ 32.056334][ T354] ? kmem_cache_free (mm/slub.c:4613 mm/slub.c:4715)
[ 32.056481][ T354] ? remove_proc_entry (fs/proc/generic.c:686)
[ 32.056631][ T354] ? __pfx_lock_acquire.part.0 (kernel/locking/lockdep.c:5814)
[ 32.056782][ T354] ? trace_lock_acquire (./include/trace/events/lock.h:24 (discriminator 37))
[ 32.056936][ T354] ? lock_acquire (kernel/locking/lockdep.c:5822)
[ 32.057082][ T354] ? blocking_notifier_call_chain (kernel/notifier.c:380 kernel/notifier.c:368)
[ 32.057262][ T354] down_read (./arch/x86/include/asm/preempt.h:79 kernel/locking/rwsem.c:1246 kernel/locking/rwsem.c:1261 kernel/locking/rwsem.c:1526)
[ 32.057375][ T354] ? blocking_notifier_call_chain (kernel/notifier.c:380 kernel/notifier.c:368)
[ 32.057560][ T354] ? __pfx_down_read (kernel/locking/rwsem.c:1522)
[ 32.057704][ T354] ? __debug_check_no_obj_freed (lib/debugobjects.c:1110)
[ 32.057895][ T354] blocking_notifier_call_chain (kernel/notifier.c:380 kernel/notifier.c:368)
[ 32.058040][ T354] __netdev_upper_dev_unlink (net/core/dev.c:8000 (discriminator 11) net/core/dev.c:8017 (discriminator 11) net/core/dev.c:8167 (discriminator 11))
[ 32.058184][ T354] ? mark_held_locks (kernel/locking/lockdep.c:4321)
[ 32.058329][ T354] ? __pfx___netdev_upper_dev_unlink (net/core/dev.c:8151)
[ 32.058513][ T354] ? unregister_netdevice_queue (net/core/dev.c:11497)
[ 32.058700][ T354] ? __pfx_unregister_netdevice_queue (net/core/dev.c:11496)
[ 32.058879][ T354] ? remove_proc_entry (fs/proc/generic.c:686)
[ 32.059025][ T354] netdev_upper_dev_unlink (net/core/dev.c:8190)
[ 32.059172][ T354] ? __pfx_netdev_upper_dev_unlink (net/core/dev.c:8190)
[ 32.059352][ T354] macvlan_device_event (drivers/net/macvlan.c:1829 (discriminator 3))
[ 32.059499][ T354] ? __pfx_macvlan_device_event (drivers/net/macvlan.c:1779)
[ 32.059645][ T354] ? bond_remove_proc_entry (drivers/net/bonding/bond_procfs.c:307)
[ 32.059794][ T354] notifier_call_chain (kernel/notifier.c:85 (discriminator 2))
[ 32.059946][ T354] blocking_notifier_call_chain (kernel/notifier.c:381 kernel/notifier.c:368)
[ 32.060091][ T354] unregister_netdevice_many_notify (net/core/dev.c:11571)
[ 32.060284][ T354] ? __pfx_unregister_netdevice_many_notify (net/core/dev.c:11512)
[ 32.060463][ T354] ? rtnl_dellink (net/core/rtnetlink.c:3512)
[ 32.060611][ T354] ? __pfx___mutex_lock (kernel/locking/mutex.c:734)
[ 32.060760][ T354] ? rtnl_is_locked (net/core/rtnetlink.c:164)
[ 32.060908][ T354] ? unregister_netdevice_queue (net/core/dev.c:11497)
[ 32.061097][ T354] ? __pfx_unregister_netdevice_queue (net/core/dev.c:11496)
[ 32.061273][ T354] ? __nla_validate_parse (./include/net/netlink.h:1270 (discriminator 1) lib/nlattr.c:622 (discriminator 1))
[ 32.061423][ T354] rtnl_dellink (net/core/rtnetlink.c:3478 net/core/rtnetlink.c:3518)
[ 32.061568][ T354] ? __pfx_rtnl_dellink (net/core/rtnetlink.c:3484)
[ 32.061733][ T354] ? find_held_lock (kernel/locking/lockdep.c:5339)
[ 32.061881][ T354] ? __lock_release (kernel/locking/lockdep.c:5525)
[ 32.062027][ T354] ? rtnetlink_rcv_msg (./include/linux/rcupdate.h:347 ./include/linux/rcupdate.h:880 net/core/rtnetlink.c:6900)
[ 32.062172][ T354] ? __pfx___lock_release (kernel/locking/lockdep.c:5501)
[ 32.062320][ T354] ? __pfx_lock_acquire.part.0 (kernel/locking/lockdep.c:5814)
[ 32.062470][ T354] ? rtnetlink_rcv_msg (./include/linux/rcupdate.h:347 ./include/linux/rcupdate.h:880 net/core/rtnetlink.c:6900)
[ 32.062621][ T354] ? __pfx_rtnl_dellink (net/core/rtnetlink.c:3484)
[ 32.062768][ T354] rtnetlink_rcv_msg (net/core/rtnetlink.c:6902)
[ 32.062914][ T354] ? __pfx_rtnetlink_rcv_msg (net/core/rtnetlink.c:6805)
[ 32.063058][ T354] ? 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)
[ 32.063209][ T354] ? mark_lock (kernel/locking/lockdep.c:4727 (discriminator 3))
[ 32.063322][ T354] ? __lock_acquire (kernel/locking/lockdep.c:5226)
[ 32.063468][ T354] netlink_rcv_skb (net/netlink/af_netlink.c:2543)
[ 32.063615][ T354] ? __pfx_rtnetlink_rcv_msg (net/core/rtnetlink.c:6805)
[ 32.063762][ T354] ? __pfx_netlink_rcv_skb (net/netlink/af_netlink.c:2520)
[ 32.063912][ T354] ? netlink_deliver_tap (./include/linux/rcupdate.h:347 ./include/linux/rcupdate.h:880 net/netlink/af_netlink.c:340)
[ 32.064057][ T354] ? netlink_deliver_tap (./include/linux/rcupdate.h:347 ./include/linux/rcupdate.h:880 ./include/net/netns/generic.h:48 net/netlink/af_netlink.c:333)
[ 32.064203][ T354] netlink_unicast (net/netlink/af_netlink.c:1322 net/netlink/af_netlink.c:1348)
[ 32.064353][ T354] ? __pfx_netlink_unicast (net/netlink/af_netlink.c:1333)
[ 32.064502][ T354] ? find_held_lock (kernel/locking/lockdep.c:5339)
[ 32.064654][ T354] netlink_sendmsg (net/netlink/af_netlink.c:1892)
[ 32.064803][ T354] ? __pfx_netlink_sendmsg (net/netlink/af_netlink.c:1811)
[ 32.064953][ T354] ____sys_sendmsg (net/socket.c:711 net/socket.c:726 net/socket.c:2594)
[ 32.065101][ T354] ? __pfx_____sys_sendmsg (net/socket.c:2540)
[ 32.065249][ T354] ? __pfx_copy_msghdr_from_user (net/socket.c:2520)
[ 32.065432][ T354] ___sys_sendmsg (net/socket.c:2650)
[ 32.065581][ T354] ? __pfx____sys_sendmsg (net/socket.c:2637)
[ 32.065734][ T354] ? kasan_save_stack (mm/kasan/common.c:49)
[ 32.065881][ T354] ? kasan_save_stack (mm/kasan/common.c:48)
[ 32.066028][ T354] ? __kasan_record_aux_stack (mm/kasan/generic.c:544)
[ 32.066176][ T354] ? __call_rcu_common.constprop.0 (./arch/x86/include/asm/irqflags.h:26 ./arch/x86/include/asm/irqflags.h:87 ./arch/x86/include/asm/irqflags.h:123 kernel/rcu/tree.c:3087)
[ 32.066360][ T354] ? __x64_sys_close (fs/open.c:1557 fs/open.c:1539 fs/open.c:1539)
[ 32.066512][ T354] ? do_syscall_64 (arch/x86/entry/common.c:52 arch/x86/entry/common.c:83)
[ 32.066659][ T354] ? entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:130)
[ 32.066848][ T354] ? __lock_acquire (kernel/locking/lockdep.c:5226)
[ 32.066996][ T354] ? find_held_lock (kernel/locking/lockdep.c:5339)
[ 32.067143][ T354] ? __lock_release (kernel/locking/lockdep.c:5525)
[ 32.067292][ T354] ? __virt_addr_valid (./include/linux/rcupdate.h:347 ./include/linux/rcupdate.h:962 ./include/linux/mmzone.h:2058 arch/x86/mm/physaddr.c:65)
[ 32.067441][ T354] ? __pfx___lock_release (kernel/locking/lockdep.c:5501)
[ 32.067592][ T354] ? __pfx_lock_acquire.part.0 (kernel/locking/lockdep.c:5814)
[ 32.067739][ T354] __sys_sendmsg (net/socket.c:2680)
[ 32.067888][ T354] ? __pfx___sys_sendmsg (net/socket.c:2665)
[ 32.068033][ T354] ? __pfx_slab_free_after_rcu_debug (mm/slub.c:4643)
[ 32.068225][ T354] do_syscall_64 (arch/x86/entry/common.c:52 arch/x86/entry/common.c:83)
[ 32.068368][ T354] entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:130)
[   32.068551][  T354] RIP: 0033:0x7ffb87b1b9a7
[ 32.068704][ T354] Code: 0a 00 f7 d8 64 89 02 48 c7 c0 ff ff ff ff eb b9 0f 1f 00 f3 0f 1e fa 64 8b 04 25 18 00 00 00 85 c0 75 10 b8 2e 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 51 c3 48 83 ec 28 89 54 24 1c 48 89 74 24 10
All code
========
   0:	0a 00                	or     (%rax),%al
   2:	f7 d8                	neg    %eax
   4:	64 89 02             	mov    %eax,%fs:(%rdx)
   7:	48 c7 c0 ff ff ff ff 	mov    $0xffffffffffffffff,%rax
   e:	eb b9                	jmp    0xffffffffffffffc9
  10:	0f 1f 00             	nopl   (%rax)
  13:	f3 0f 1e fa          	endbr64
  17:	64 8b 04 25 18 00 00 	mov    %fs:0x18,%eax
  1e:	00 
  1f:	85 c0                	test   %eax,%eax
  21:	75 10                	jne    0x33
  23:	b8 2e 00 00 00       	mov    $0x2e,%eax
  28:	0f 05                	syscall
  2a:*	48 3d 00 f0 ff ff    	cmp    $0xfffffffffffff000,%rax		<-- trapping instruction
  30:	77 51                	ja     0x83
  32:	c3                   	ret
  33:	48 83 ec 28          	sub    $0x28,%rsp
  37:	89 54 24 1c          	mov    %edx,0x1c(%rsp)
  3b:	48 89 74 24 10       	mov    %rsi,0x10(%rsp)

Code starting with the faulting instruction
===========================================
   0:	48 3d 00 f0 ff ff    	cmp    $0xfffffffffffff000,%rax
   6:	77 51                	ja     0x59
   8:	c3                   	ret
   9:	48 83 ec 28          	sub    $0x28,%rsp
   d:	89 54 24 1c          	mov    %edx,0x1c(%rsp)
  11:	48 89 74 24 10       	mov    %rsi,0x10(%rsp)
[   32.069222][  T354] RSP: 002b:00007ffc7eefb9c8 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
[   32.069445][  T354] RAX: ffffffffffffffda RBX: 00007ffc7eefc100 RCX: 00007ffb87b1b9a7
[   32.069666][  T354] RDX: 0000000000000000 RSI: 00007ffc7eefba30 RDI: 0000000000000005
[   32.069889][  T354] RBP: 0000000000000001 R08: 0000000000000003 R09: 0000000000000078
[   32.070111][  T354] R10: 00007ffb879d94a8 R11: 0000000000000246 R12: 0000000000000001


Finger prints:
print_deadlock_bug:validate_chain:__lock_acquire:down_read:blocking_notifier_call_chain