======================================
| [ 32.624556][ T579] #0: ffffffffb7007e88 (rtnl_mutex){+.+.}-{4:4}, at: rtnl_dellink (net/core/rtnetlink.c:3512)
| [ 32.624805][ T579] #1: ffffffffb6ff6a70 ((netdev_chain).rwsem){++++}-{4:4}, at: blocking_notifier_call_chain (kernel/notifier.c:380 kernel/notifier.c:368)
| [   32.625083][  T579]
| [   32.625083][  T579] stack backtrace:
[   32.625486][  T579] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[   32.625664][  T579] Call Trace:
[   32.625784][  T579]  <TASK>
[ 32.625856][ T579] dump_stack_lvl (lib/dump_stack.c:123)
[ 32.625999][ T579] print_deadlock_bug (kernel/locking/lockdep.c:3040)
[ 32.626142][ T579] validate_chain (kernel/locking/lockdep.c:3894)
[ 32.626300][ T579] ? __pfx_validate_chain (kernel/locking/lockdep.c:3860)
[ 32.626447][ T579] ? 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)
[ 32.626589][ T579] ? mark_lock (kernel/locking/lockdep.c:4727 (discriminator 3))
[ 32.626709][ T579] __lock_acquire (kernel/locking/lockdep.c:5226)
[ 32.626849][ T579] ? execlists_create_virtual (drivers/gpu/drm/i915/gt/intel_execlists_submission.c:4059)
[ 32.627024][ T579] lock_acquire.part.0 (kernel/locking/lockdep.c:467 kernel/locking/lockdep.c:5851)
[ 32.627163][ T579] ? blocking_notifier_call_chain (kernel/notifier.c:380 kernel/notifier.c:368)
[ 32.627359][ T579] ? __lock_acquire (kernel/locking/lockdep.c:5226)
[ 32.627502][ T579] ? __pfx_lock_acquire.part.0 (kernel/locking/lockdep.c:5814)
[ 32.627649][ T579] ? trace_lock_acquire (./include/trace/events/lock.h:24 (discriminator 37))
[ 32.627792][ T579] ? lock_acquire (kernel/locking/lockdep.c:5822)
[ 32.627935][ T579] ? blocking_notifier_call_chain (kernel/notifier.c:380 kernel/notifier.c:368)
[ 32.628114][ T579] down_read (./arch/x86/include/asm/preempt.h:79 kernel/locking/rwsem.c:1246 kernel/locking/rwsem.c:1261 kernel/locking/rwsem.c:1526)
[ 32.628223][ T579] ? blocking_notifier_call_chain (kernel/notifier.c:380 kernel/notifier.c:368)
[ 32.628399][ T579] ? __pfx_down_read (kernel/locking/rwsem.c:1522)
[ 32.628582][ T579] ? __lock_release (kernel/locking/lockdep.c:5525)
[ 32.628724][ T579] blocking_notifier_call_chain (kernel/notifier.c:380 kernel/notifier.c:368)
[ 32.628867][ T579] __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))
[ 32.629011][ T579] ? mark_held_locks (kernel/locking/lockdep.c:4321)
[ 32.629152][ T579] ? __pfx___netdev_upper_dev_unlink (net/core/dev.c:8151)
[ 32.629355][ T579] ? lockdep_hardirqs_on_prepare (kernel/locking/lockdep.c:4347 kernel/locking/lockdep.c:4406)
[ 32.629535][ T579] ? __try_to_del_timer_sync (kernel/time/timer.c:1498)
[ 32.629680][ T579] ? __pfx___try_to_del_timer_sync (kernel/time/timer.c:1498)
[ 32.629856][ T579] ? mark_held_locks (kernel/locking/lockdep.c:4321)
[ 32.629998][ T579] netdev_upper_dev_unlink (net/core/dev.c:8190)
[ 32.630139][ T579] ? __pfx_netdev_upper_dev_unlink (net/core/dev.c:8190)
[ 32.630314][ T579] ? mutex_is_locked (./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/mutex.h:47 kernel/locking/mutex.c:66)
[ 32.630455][ T579] ? rtnl_is_locked (net/core/rtnetlink.c:164)
[ 32.630601][ T579] ? netdev_master_upper_dev_get (net/core/dev.c:7230)
[ 32.630777][ T579] vrf_device_event (drivers/net/vrf.c:1110 drivers/net/vrf.c:1119 drivers/net/vrf.c:1804)
[ 32.630920][ T579] notifier_call_chain (kernel/notifier.c:85 (discriminator 2))
[ 32.631062][ T579] blocking_notifier_call_chain (kernel/notifier.c:381 kernel/notifier.c:368)
[ 32.631214][ T579] unregister_netdevice_many_notify (net/core/dev.c:11571)
[ 32.631387][ T579] ? __pfx_unregister_netdevice_many_notify (net/core/dev.c:11512)
[ 32.631557][ T579] ? rtnl_dellink (net/core/rtnetlink.c:3512)
[ 32.631696][ T579] ? sock_def_readable (./include/linux/rcupdate.h:347 ./include/linux/rcupdate.h:880 net/core/sock.c:3479)
[ 32.631836][ T579] ? __pfx___mutex_lock (kernel/locking/mutex.c:734)
[ 32.631976][ T579] ? rtnl_is_locked (net/core/rtnetlink.c:164)
[ 32.632112][ T579] ? unregister_netdevice_queue (net/core/dev.c:11497)
[ 32.632282][ T579] ? __pfx_unregister_netdevice_queue (net/core/dev.c:11496)
[ 32.632453][ T579] ? __nla_validate_parse (./include/net/netlink.h:1270 (discriminator 1) lib/nlattr.c:622 (discriminator 1))
[ 32.632593][ T579] rtnl_dellink (net/core/rtnetlink.c:3478 net/core/rtnetlink.c:3518)
[ 32.632734][ T579] ? __pfx_rtnl_dellink (net/core/rtnetlink.c:3484)
[ 32.632885][ T579] ? find_held_lock (kernel/locking/lockdep.c:5339)
[ 32.633025][ T579] ? __lock_release (kernel/locking/lockdep.c:5525)
[ 32.633162][ T579] ? rtnetlink_rcv_msg (./include/linux/rcupdate.h:347 ./include/linux/rcupdate.h:880 net/core/rtnetlink.c:6900)
[ 32.633298][ T579] ? __pfx___lock_release (kernel/locking/lockdep.c:5501)
[ 32.633436][ T579] ? __pfx_lock_acquire.part.0 (kernel/locking/lockdep.c:5814)
[ 32.633578][ T579] ? rtnetlink_rcv_msg (./include/linux/rcupdate.h:347 ./include/linux/rcupdate.h:880 net/core/rtnetlink.c:6900)
[ 32.633719][ T579] ? __pfx_rtnl_dellink (net/core/rtnetlink.c:3484)
[ 32.633857][ T579] rtnetlink_rcv_msg (net/core/rtnetlink.c:6902)
[ 32.633995][ T579] ? __pfx_rtnetlink_rcv_msg (net/core/rtnetlink.c:6805)
[ 32.634133][ T579] ? 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)
[ 32.634270][ T579] ? mark_lock (kernel/locking/lockdep.c:4727 (discriminator 3))
[ 32.634376][ T579] ? __lock_acquire (kernel/locking/lockdep.c:5226)
[ 32.634514][ T579] netlink_rcv_skb (net/netlink/af_netlink.c:2543)
[ 32.634655][ T579] ? __pfx_rtnetlink_rcv_msg (net/core/rtnetlink.c:6805)
[ 32.634797][ T579] ? __pfx_netlink_rcv_skb (net/netlink/af_netlink.c:2520)
[ 32.634938][ T579] ? netlink_deliver_tap (./include/linux/rcupdate.h:347 ./include/linux/rcupdate.h:880 net/netlink/af_netlink.c:340)
[ 32.635075][ T579] ? 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)
[ 32.635216][ T579] netlink_unicast (net/netlink/af_netlink.c:1322 net/netlink/af_netlink.c:1348)
[ 32.635356][ T579] ? __pfx_netlink_unicast (net/netlink/af_netlink.c:1333)
[ 32.635493][ T579] ? find_held_lock (kernel/locking/lockdep.c:5339)
[ 32.635634][ T579] netlink_sendmsg (net/netlink/af_netlink.c:1892)
[ 32.635774][ T579] ? __pfx_netlink_sendmsg (net/netlink/af_netlink.c:1811)
[ 32.635915][ T579] ____sys_sendmsg (net/socket.c:711 net/socket.c:726 net/socket.c:2594)
[ 32.636053][ T579] ? __pfx_____sys_sendmsg (net/socket.c:2540)
[ 32.636189][ T579] ? __pfx_copy_msghdr_from_user (net/socket.c:2520)
[ 32.636365][ T579] ___sys_sendmsg (net/socket.c:2650)
[ 32.636504][ T579] ? __pfx____sys_sendmsg (net/socket.c:2637)
[ 32.636646][ T579] ? kasan_save_stack (mm/kasan/common.c:49)
[ 32.636785][ T579] ? kasan_save_stack (mm/kasan/common.c:48)
[ 32.636925][ T579] ? __kasan_record_aux_stack (mm/kasan/generic.c:544)
[ 32.637063][ T579] ? __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)
[ 32.637236][ T579] ? __x64_sys_close (fs/open.c:1557 fs/open.c:1539 fs/open.c:1539)
[ 32.637376][ T579] ? do_syscall_64 (arch/x86/entry/common.c:52 arch/x86/entry/common.c:83)
[ 32.637516][ T579] ? entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:130)
[ 32.637689][ T579] ? __lock_acquire (kernel/locking/lockdep.c:5226)
[ 32.637832][ T579] ? find_held_lock (kernel/locking/lockdep.c:5339)
[ 32.637971][ T579] ? __lock_release (kernel/locking/lockdep.c:5525)
[ 32.638108][ T579] ? __virt_addr_valid (./include/linux/rcupdate.h:347 ./include/linux/rcupdate.h:962 ./include/linux/mmzone.h:2058 arch/x86/mm/physaddr.c:65)
[ 32.638249][ T579] ? __pfx___lock_release (kernel/locking/lockdep.c:5501)
[ 32.638388][ T579] ? __pfx_lock_acquire.part.0 (kernel/locking/lockdep.c:5814)
[ 32.638554][ T579] __sys_sendmsg (net/socket.c:2680)
[ 32.638713][ T579] ? __pfx___sys_sendmsg (net/socket.c:2665)
[ 32.638858][ T579] ? __pfx_slab_free_after_rcu_debug (mm/slub.c:4643)
[ 32.639042][ T579] do_syscall_64 (arch/x86/entry/common.c:52 arch/x86/entry/common.c:83)
[ 32.639186][ T579] entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:130)
[   32.639361][  T579] RIP: 0033:0x7f206826c9a7
[ 32.639509][ T579] 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)
[   32.640015][  T579] RSP: 002b:00007ffe3b7828f8 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
[   32.640225][  T579] RAX: ffffffffffffffda RBX: 00007ffe3b783030 RCX: 00007f206826c9a7
[   32.640450][  T579] RDX: 0000000000000000 RSI: 00007ffe3b782960 RDI: 0000000000000005
[   32.640661][  T579] RBP: 0000000000000002 R08: 0000000000000003 R09: 0000000000000078
[   32.640877][  T579] R10: 00007f206812a4a8 R11: 0000000000000246 R12: 0000000000000002


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