======================================
| [848.015416][T10156] #0: ffffffff9f80b088 (rtnl_mutex){+.+.}-{4:4}, at: rtnl_newlink (net/core/rtnetlink.c:342 net/core/rtnetlink.c:4043) 
| [848.015695][T10156] #1: ffffffff9f7f9b10 (dev_addr_sem){++++}-{4:4}, at: netif_set_mac_address_user (net/core/dev.c:9418) 
| [  848.015999][T10156]
| [  848.015999][T10156] stack backtrace:
[  848.016267][T10156] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[  848.016270][T10156] Call Trace:
[  848.016273][T10156]  <TASK>
[848.016276][T10156] dump_stack_lvl (lib/dump_stack.c:123) 
[848.016287][T10156] print_circular_bug (kernel/locking/lockdep.c:2079) 
[848.016297][T10156] check_noncircular (kernel/locking/lockdep.c:2208) 
[848.016305][T10156] ? __pfx_check_noncircular (kernel/locking/lockdep.c:2184) 
[848.016312][T10156] ? __pfx_validate_chain (kernel/locking/lockdep.c:3862) 
[848.016319][T10156] ? 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:230) 
[848.016327][T10156] ? alloc_chain_hlocks (kernel/locking/lockdep.c:3530) 
[848.016335][T10156] check_prev_add (kernel/locking/lockdep.c:3164) 
[848.016345][T10156] validate_chain (kernel/locking/lockdep.c:3283 kernel/locking/lockdep.c:3906) 
[848.016353][T10156] ? __pfx_lock_acquire.part.0 (kernel/locking/lockdep.c:5816) 
[848.016358][T10156] ? __pfx_validate_chain (kernel/locking/lockdep.c:3862) 
[848.016365][T10156] ? 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:230) 
[848.016370][T10156] ? mark_lock (kernel/locking/lockdep.c:4729 (discriminator 3)) 
[848.016379][T10156] __lock_acquire (kernel/locking/lockdep.c:5228) 
[848.016388][T10156] ? unwind_get_return_address (arch/x86/kernel/unwind_orc.c:369 arch/x86/kernel/unwind_orc.c:364) 
[848.016399][T10156] lock_acquire.part.0 (kernel/locking/lockdep.c:469 kernel/locking/lockdep.c:5853) 
[848.016403][T10156] ? team_set_mac_address (drivers/net/team/team_core.c:1817) 
[848.016411][T10156] ? __pfx_lock_acquire.part.0 (kernel/locking/lockdep.c:5816) 
[848.016416][T10156] ? trace_lock_acquire (./include/trace/events/lock.h:24 (discriminator 21)) 
[848.016424][T10156] ? lock_acquire (kernel/locking/lockdep.c:5824) 
[848.016427][T10156] ? team_set_mac_address (drivers/net/team/team_core.c:1817) 
[848.016434][T10156] __mutex_lock (kernel/locking/mutex.c:587 kernel/locking/mutex.c:730) 
[848.016439][T10156] ? team_set_mac_address (drivers/net/team/team_core.c:1817) 
[848.016444][T10156] ? __lock_release (kernel/locking/lockdep.c:5527) 
[848.016448][T10156] ? packet_notifier (./include/linux/rcupdate.h:347 ./include/linux/rcupdate.h:880 net/packet/af_packet.c:4279) 
[848.016456][T10156] ? team_set_mac_address (drivers/net/team/team_core.c:1817) 
[848.016460][T10156] ? __pfx_lock_acquire.part.0 (kernel/locking/lockdep.c:5816) 
[848.016466][T10156] ? __pfx___mutex_lock (kernel/locking/mutex.c:729) 
[848.016470][T10156] ? __lock_acquire (kernel/locking/lockdep.c:5228) 
[848.016479][T10156] ? __pfx_br_device_event (net/bridge/br.c:29) 
[848.016486][T10156] ? dev_addr_mod (net/core/dev_addr_lists.c:584) 
[848.016495][T10156] ? team_set_mac_address (drivers/net/team/team_core.c:1817) 
[848.016500][T10156] team_set_mac_address (drivers/net/team/team_core.c:1817) 
[848.016508][T10156] netif_set_mac_address (net/core/dev.c:9400) 
[848.016515][T10156] ? __pfx_netif_set_mac_address (net/core/dev.c:9386) 
[848.016523][T10156] ? __pfx_down_write (kernel/locking/rwsem.c:1575) 
[848.016529][T10156] ? trace_kmalloc (./include/trace/events/kmem.h:54 (discriminator 21)) 
[848.016540][T10156] netif_set_mac_address_user (net/core/dev.c:9419) 
[848.016547][T10156] do_setlink.constprop.0 (net/core/rtnetlink.c:3089) 
[848.016556][T10156] ? __pfx_do_setlink.constprop.0 (net/core/rtnetlink.c:3012) 
[848.016564][T10156] ? lock_acquire.part.0 (kernel/locking/lockdep.c:469 kernel/locking/lockdep.c:5853) 
[848.016568][T10156] ? rtnl_newlink (net/core/rtnetlink.c:342 net/core/rtnetlink.c:4043) 
[848.016574][T10156] ? rtnl_newlink (./include/linux/slab.h:901 net/core/rtnetlink.c:3944) 
[848.016578][T10156] ? rtnetlink_rcv_msg (net/core/rtnetlink.c:6934) 
[848.016582][T10156] ? __mutex_trylock_common (./arch/x86/include/asm/atomic64_64.h:101 ./include/linux/atomic/atomic-arch-fallback.h:4296 ./include/linux/atomic/atomic-long.h:1482 ./include/linux/atomic/atomic-instrumented.h:4458 kernel/locking/mutex.c:104) 
[848.016588][T10156] ? __pfx___mutex_trylock_common (kernel/locking/mutex.c:79) 
[848.016593][T10156] ? lock_acquire (kernel/locking/lockdep.c:5824) 
[848.016596][T10156] ? trace_contention_end (./include/trace/events/lock.h:122 (discriminator 21)) 
[848.016600][T10156] ? __mutex_lock (./arch/x86/include/asm/preempt.h:94 kernel/locking/mutex.c:595 kernel/locking/mutex.c:730) 
[848.016603][T10156] ? __pfx_do_raw_spin_lock (kernel/locking/spinlock_debug.c:114) 
[848.016607][T10156] ? rtnl_newlink (net/core/rtnetlink.c:342 net/core/rtnetlink.c:4043) 
[848.016610][T10156] ? __pfx___mutex_lock (kernel/locking/mutex.c:729) 
[848.016612][T10156] ? __pfx_validate_nla (lib/nlattr.c:396) 
[848.016620][T10156] ? trace_cap_capable (./include/trace/events/capability.h:26 (discriminator 21)) 
[848.016626][T10156] ? __rtnl_newlink (net/core/rtnetlink.c:3894) 
[848.016631][T10156] rtnl_newlink (net/core/rtnetlink.c:350 net/core/rtnetlink.c:4045) 
[848.016636][T10156] ? __pfx_rtnl_newlink (net/core/rtnetlink.c:3935) 
[848.016639][T10156] ? find_held_lock (kernel/locking/lockdep.c:5341) 
[848.016644][T10156] ? __pfx___lock_release (kernel/locking/lockdep.c:5503) 
[848.016646][T10156] ? __pfx_lock_acquire.part.0 (kernel/locking/lockdep.c:5816) 
[848.016651][T10156] ? rtnetlink_rcv_msg (./include/linux/rcupdate.h:347 ./include/linux/rcupdate.h:880 net/core/rtnetlink.c:6932) 
[848.016655][T10156] ? __pfx_rtnl_newlink (net/core/rtnetlink.c:3935) 
[848.016658][T10156] rtnetlink_rcv_msg (net/core/rtnetlink.c:6934) 
[848.016663][T10156] ? __pfx_rtnetlink_rcv_msg (net/core/rtnetlink.c:6837) 
[848.016666][T10156] ? 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:230) 
[848.016669][T10156] ? mark_lock (kernel/locking/lockdep.c:4729 (discriminator 3)) 
[848.016674][T10156] ? __lock_acquire (kernel/locking/lockdep.c:5228) 
[848.016678][T10156] netlink_rcv_skb (net/netlink/af_netlink.c:2544) 
[848.016683][T10156] ? __pfx_rtnetlink_rcv_msg (net/core/rtnetlink.c:6837) 
[848.016688][T10156] ? __pfx_netlink_rcv_skb (net/netlink/af_netlink.c:2521) 
[848.016695][T10156] ? netlink_deliver_tap (./include/linux/rcupdate.h:347 ./include/linux/rcupdate.h:880 net/netlink/af_netlink.c:340) 
[848.016699][T10156] ? 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) 
[848.016704][T10156] netlink_unicast (net/netlink/af_netlink.c:1323 net/netlink/af_netlink.c:1349) 
[848.016708][T10156] ? __pfx_netlink_unicast (net/netlink/af_netlink.c:1334) 
[848.016712][T10156] ? find_held_lock (kernel/locking/lockdep.c:5341) 
[848.016716][T10156] netlink_sendmsg (net/netlink/af_netlink.c:1893) 
[848.016721][T10156] ? __pfx_netlink_sendmsg (net/netlink/af_netlink.c:1812) 
[848.016728][T10156] ____sys_sendmsg (net/socket.c:718 net/socket.c:733 net/socket.c:2573) 
[848.016733][T10156] ? __pfx_____sys_sendmsg (net/socket.c:2519) 
[848.016736][T10156] ? __pfx_copy_msghdr_from_user (net/socket.c:2499) 
[848.016743][T10156] ___sys_sendmsg (net/socket.c:2629) 
[848.016747][T10156] ? __pfx____sys_sendmsg (net/socket.c:2616) 
[848.016751][T10156] ? ___sys_recvmsg (net/socket.c:2825) 
[848.016754][T10156] ? __pfx____sys_recvmsg (net/socket.c:2825) 
[848.016757][T10156] ? __pfx_poll_select_finish (fs/select.c:298) 
[848.016763][T10156] ? _copy_from_user (./arch/x86/include/asm/smap.h:29 ./arch/x86/include/asm/uaccess_64.h:134 ./arch/x86/include/asm/uaccess_64.h:141 ./include/linux/uaccess.h:178 lib/usercopy.c:18) 
[848.016770][T10156] ? __pfx_ep_poll (fs/eventpoll.c:2002) 
[848.016781][T10156] ? do_pselect.constprop.0 (fs/select.c:760) 
[848.016786][T10156] __sys_sendmsg (net/socket.c:2659) 
[848.016789][T10156] ? __pfx___sys_sendmsg (net/socket.c:2644) 
[848.016794][T10156] ? do_user_addr_fault (./include/linux/rcupdate.h:882 ./include/linux/mm.h:742 arch/x86/mm/fault.c:1339) 
[848.016801][T10156] do_syscall_64 (arch/x86/entry/common.c:52 arch/x86/entry/common.c:83) 
[848.016804][T10156] entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:130) 
[  848.016809][T10156] RIP: 0033:0x7f63e738b9a7
[ 848.016814][T10156] 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)
[  848.016817][T10156] RSP: 002b:00007fffd6c17f18 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
[  848.016821][T10156] RAX: ffffffffffffffda RBX: 000000000963c730 RCX: 00007f63e738b9a7
[  848.016823][T10156] RDX: 0000000000000000 RSI: 00007fffd6c17f50 RDI: 0000000000000005
[  848.016825][T10156] RBP: 000000000963c640 R08: 000000000000000a R09: 0000000000000077
[  848.016826][T10156] R10: 0000000000000063 R11: 0000000000000246 R12: 00000000096476d0


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