======================================
| [   35.076249][  T283] 1 lock held by ip/283:
| [ 35.076374][ T283] #0: ffffffff8a9c5cc8 (rtnl_mutex){+.+.}-{3:3}, at: rtnetlink_rcv_msg (net/core/rtnetlink.c:6645) 
| [   35.076687][  T283]
| [   35.076687][  T283] stack backtrace:
[   35.077149][  T283] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[   35.077505][  T283] Call Trace:
[   35.077635][  T283]  <TASK>
[ 35.077723][ T283] dump_stack_lvl (lib/dump_stack.c:122) 
[ 35.077895][ T283] lockdep_rcu_suspicious (./include/linux/context_tracking.h:153 kernel/locking/lockdep.c:6725) 
[ 35.078059][ T283] ? __pfx_br_handle_frame (net/bridge/br_input.c:326) bridge
[ 35.078326][ T283] br_get_link_af_size_filtered (net/bridge/br_private.h:930 net/bridge/br_private.h:940 net/bridge/br_netlink.c:105) bridge
[ 35.078558][ T283] br_info_notify (./include/linux/skbuff.h:1320 ./include/net/netlink.h:1015 net/bridge/br_netlink.c:645) bridge
[ 35.078748][ T283] ? lockdep_hardirqs_on_prepare (kernel/locking/lockdep.c:4299 kernel/locking/lockdep.c:4358) 
[ 35.078955][ T283] br_add_if (net/bridge/br_if.c:692) bridge
[ 35.079147][ T283] ? rtnl_is_locked (net/core/rtnetlink.c:164) 
[ 35.079311][ T283] ? netdev_master_upper_dev_get (net/core/dev.c:7102) 
[ 35.079518][ T283] do_setlink (net/core/rtnetlink.c:2907) 
[ 35.079683][ T283] ? is_bpf_text_address (./include/linux/rcupdate.h:336 ./include/linux/rcupdate.h:869 ./kernel/bpf/core.c:769) 
[ 35.079854][ T283] ? __pfx_do_setlink (net/core/rtnetlink.c:2778) 
[ 35.080017][ T283] ? is_bpf_text_address (./kernel/bpf/core.c:772) 
[ 35.080179][ T283] ? kernel_text_address (kernel/extable.c:97 kernel/extable.c:94) 
[ 35.080344][ T283] ? __kernel_text_address (kernel/extable.c:79) 
[ 35.080506][ T283] ? unwind_get_return_address (arch/x86/kernel/unwind_orc.c:369 arch/x86/kernel/unwind_orc.c:364) 
[ 35.080674][ T283] ? __pfx_stack_trace_consume_entry (kernel/stacktrace.c:83) 
[ 35.080878][ T283] ? arch_stack_walk (arch/x86/kernel/stacktrace.c:26) 
[ 35.081056][ T283] ? stack_trace_save (kernel/stacktrace.c:123) 
[ 35.081219][ T283] ? __pfx_stack_trace_save (kernel/stacktrace.c:114) 
[ 35.081384][ T283] ? __pfx_validate_nla (lib/nlattr.c:396) 
[ 35.081550][ T283] ? mark_lock (kernel/locking/lockdep.c:4655 (discriminator 3)) 
[ 35.081678][ T283] ? kasan_save_stack (mm/kasan/common.c:49) 
[ 35.081843][ T283] ? __nla_validate_parse (lib/nlattr.c:638) 
[ 35.082013][ T283] __rtnl_newlink (net/core/rtnetlink.c:3696) 
[ 35.082184][ T283] ? 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:227) 
[ 35.082348][ T283] ? __pfx___rtnl_newlink (net/core/rtnetlink.c:3557) 
[ 35.082519][ T283] ? lockdep_hardirqs_on_prepare (kernel/locking/lockdep.c:4299 kernel/locking/lockdep.c:4358) 
[ 35.082729][ T283] ? __create_object (mm/kmemleak.c:751) 
[ 35.082894][ T283] ? trace_kmalloc (./include/trace/events/kmem.h:54 (discriminator 52)) 
[ 35.083065][ T283] rtnl_newlink (net/core/rtnetlink.c:3744) 
[ 35.083190][ T283] rtnetlink_rcv_msg (net/core/rtnetlink.c:6647) 
[ 35.083361][ T283] ? __pfx_rtnetlink_rcv_msg (net/core/rtnetlink.c:6541) 
[ 35.083524][ T283] ? 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:227) 
[ 35.083685][ T283] ? mark_lock (kernel/locking/lockdep.c:4655 (discriminator 3)) 
[ 35.083818][ T283] ? __lock_acquire (kernel/locking/lockdep.c:5142) 
[ 35.083986][ T283] netlink_rcv_skb (net/netlink/af_netlink.c:2550) 
[ 35.084150][ T283] ? __pfx_rtnetlink_rcv_msg (net/core/rtnetlink.c:6541) 
[ 35.084316][ T283] ? __pfx_netlink_rcv_skb (net/netlink/af_netlink.c:2527) 
[ 35.084491][ T283] ? netlink_deliver_tap (./include/linux/rcupdate.h:336 ./include/linux/rcupdate.h:869 net/netlink/af_netlink.c:340) 
[ 35.084661][ T283] ? netlink_deliver_tap (./include/linux/rcupdate.h:336 ./include/linux/rcupdate.h:869 ./include/net/netns/generic.h:48 net/netlink/af_netlink.c:333) 
[ 35.084833][ T283] netlink_unicast (net/netlink/af_netlink.c:1331 net/netlink/af_netlink.c:1357) 
[ 35.084999][ T283] ? __pfx_netlink_unicast (net/netlink/af_netlink.c:1342) 
[ 35.085172][ T283] netlink_sendmsg (net/netlink/af_netlink.c:1901) 
[ 35.085339][ T283] ? __pfx_netlink_sendmsg (net/netlink/af_netlink.c:1820) 
[ 35.085508][ T283] ? __import_iovec (lib/iov_iter.c:1263 lib/iov_iter.c:1279) 
[ 35.085680][ T283] ____sys_sendmsg (net/socket.c:730 net/socket.c:745 net/socket.c:2597) 
[ 35.085848][ T283] ? __pfx_____sys_sendmsg (net/socket.c:2543) 
[ 35.086012][ T283] ? __pfx_copy_msghdr_from_user (net/socket.c:2523) 
[ 35.086212][ T283] ? __pfx_validate_chain (kernel/locking/lockdep.c:3824) 
[ 35.086389][ T283] ___sys_sendmsg (net/socket.c:2653) 
[ 35.086558][ T283] ? __pfx____sys_sendmsg (net/socket.c:2640) 
[ 35.086725][ T283] ? find_held_lock (kernel/locking/lockdep.c:5249) 
[ 35.086903][ T283] ? __lock_release (kernel/locking/lockdep.c:5435) 
[ 35.087068][ T283] ? __debug_check_no_obj_freed (lib/debugobjects.c:1001) 
[ 35.087277][ T283] ? __pfx___lock_release (kernel/locking/lockdep.c:5411) 
[ 35.087442][ T283] ? __pfx_do_raw_spin_lock (kernel/locking/spinlock_debug.c:114) 
[ 35.087611][ T283] ? lockdep_hardirqs_on_prepare (kernel/locking/lockdep.c:4299 kernel/locking/lockdep.c:4358) 
[ 35.087821][ T283] ? __fget_light (./include/linux/atomic/atomic-arch-fallback.h:479 ./include/linux/atomic/atomic-instrumented.h:50 fs/file.c:1145) 
[ 35.087998][ T283] __sys_sendmsg (./include/linux/file.h:34 net/socket.c:2682) 
[ 35.088162][ T283] ? __pfx___sys_sendmsg (net/socket.c:2668) 
[ 35.088323][ T283] ? __virt_addr_valid (./arch/x86/include/asm/preempt.h:94 ./include/linux/rcupdate.h:953 ./include/linux/mmzone.h:2034 arch/x86/mm/physaddr.c:65) 
[ 35.088508][ T283] do_syscall_64 (arch/x86/entry/common.c:52 arch/x86/entry/common.c:83) 
[ 35.088679][ T283] entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:130) 
[   35.088882][  T283] RIP: 0033:0x7fd06f5f87b7
[ 35.089053][ T283] 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)
[   35.089628][  T283] RSP: 002b:00007fffb376d228 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
[   35.089875][  T283] RAX: ffffffffffffffda RBX: 00007fffb376d960 RCX: 00007fd06f5f87b7
[   35.090124][  T283] RDX: 0000000000000000 RSI: 00007fffb376d290 RDI: 0000000000000005
[   35.090371][  T283] RBP: 0000000000000003 R08: 0000000000000003 R09: 0000000000000000
[   35.090617][  T283] R10: 000000003db46910 R11: 0000000000000246 R12: 0000000000000003
[   35.090865][  T283] R13: 0000000066bea635 R14: 0000000000496600 R15: 0000000000000000
| [   35.093033][  T283] 1 lock held by ip/283:
| [ 35.093162][ T283] #0: ffffffff8a9c5cc8 (rtnl_mutex){+.+.}-{3:3}, at: rtnetlink_rcv_msg (net/core/rtnetlink.c:6645) 
| [   35.093462][  T283]
| [   35.093462][  T283] stack backtrace:
[   35.093921][  T283] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[   35.094279][  T283] Call Trace:
[   35.094408][  T283]  <TASK>
[ 35.094499][ T283] dump_stack_lvl (lib/dump_stack.c:122) 
[ 35.094667][ T283] lockdep_rcu_suspicious (./include/linux/context_tracking.h:153 kernel/locking/lockdep.c:6725) 
[ 35.094835][ T283] br_get_link_af_size_filtered (net/bridge/br_private.h:453 net/bridge/br_private.h:940 net/bridge/br_netlink.c:105) bridge
[ 35.095072][ T283] br_info_notify (./include/linux/skbuff.h:1320 ./include/net/netlink.h:1015 net/bridge/br_netlink.c:645) bridge
[ 35.095261][ T283] ? lockdep_hardirqs_on_prepare (kernel/locking/lockdep.c:4299 kernel/locking/lockdep.c:4358) 
[ 35.095469][ T283] br_add_if (net/bridge/br_if.c:692) bridge
[ 35.095663][ T283] ? rtnl_is_locked (net/core/rtnetlink.c:164) 
[ 35.095976][ T283] ? netdev_master_upper_dev_get (net/core/dev.c:7102) 
[ 35.096182][ T283] do_setlink (net/core/rtnetlink.c:2907) 
[ 35.096347][ T283] ? is_bpf_text_address (./include/linux/rcupdate.h:336 ./include/linux/rcupdate.h:869 ./kernel/bpf/core.c:769) 
[ 35.096512][ T283] ? __pfx_do_setlink (net/core/rtnetlink.c:2778) 
[ 35.096773][ T283] ? is_bpf_text_address (./kernel/bpf/core.c:772) 
[ 35.096952][ T283] ? kernel_text_address (kernel/extable.c:97 kernel/extable.c:94) 
[ 35.097117][ T283] ? __kernel_text_address (kernel/extable.c:79) 
[ 35.097282][ T283] ? unwind_get_return_address (arch/x86/kernel/unwind_orc.c:369 arch/x86/kernel/unwind_orc.c:364) 
[ 35.097538][ T283] ? __pfx_stack_trace_consume_entry (kernel/stacktrace.c:83) 
[ 35.097740][ T283] ? arch_stack_walk (arch/x86/kernel/stacktrace.c:26) 
[ 35.097914][ T283] ? stack_trace_save (kernel/stacktrace.c:123) 
[ 35.098077][ T283] ? __pfx_stack_trace_save (kernel/stacktrace.c:114) 
[ 35.098336][ T283] ? __pfx_validate_nla (lib/nlattr.c:396) 
[ 35.098500][ T283] ? mark_lock (kernel/locking/lockdep.c:4655 (discriminator 3)) 
[ 35.098629][ T283] ? kasan_save_stack (mm/kasan/common.c:49) 
[ 35.098796][ T283] ? __nla_validate_parse (lib/nlattr.c:638) 
[ 35.099159][ T283] __rtnl_newlink (net/core/rtnetlink.c:3696) 
[ 35.099331][ T283] ? 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:227) 
[ 35.099499][ T283] ? __pfx___rtnl_newlink (net/core/rtnetlink.c:3557) 
[ 35.099669][ T283] ? lockdep_hardirqs_on_prepare (kernel/locking/lockdep.c:4299 kernel/locking/lockdep.c:4358) 
[ 35.099966][ T283] ? __create_object (mm/kmemleak.c:751) 
[ 35.100133][ T283] ? trace_kmalloc (./include/trace/events/kmem.h:54 (discriminator 52)) 
[ 35.100301][ T283] rtnl_newlink (net/core/rtnetlink.c:3744) 
[ 35.100426][ T283] rtnetlink_rcv_msg (net/core/rtnetlink.c:6647) 
[ 35.100595][ T283] ? __pfx_rtnetlink_rcv_msg (net/core/rtnetlink.c:6541) 
[ 35.100858][ T283] ? 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:227) 
[ 35.101020][ T283] ? mark_lock (kernel/locking/lockdep.c:4655 (discriminator 3)) 
[ 35.101150][ T283] ? __lock_acquire (kernel/locking/lockdep.c:5142) 
[ 35.101317][ T283] netlink_rcv_skb (net/netlink/af_netlink.c:2550) 
[ 35.101574][ T283] ? __pfx_rtnetlink_rcv_msg (net/core/rtnetlink.c:6541) 
[ 35.101741][ T283] ? __pfx_netlink_rcv_skb (net/netlink/af_netlink.c:2527) 
[ 35.101920][ T283] ? netlink_deliver_tap (./include/linux/rcupdate.h:336 ./include/linux/rcupdate.h:869 net/netlink/af_netlink.c:340) 
[ 35.102090][ T283] ? netlink_deliver_tap (./include/linux/rcupdate.h:336 ./include/linux/rcupdate.h:869 ./include/net/netns/generic.h:48 net/netlink/af_netlink.c:333) 
[ 35.102257][ T283] netlink_unicast (net/netlink/af_netlink.c:1331 net/netlink/af_netlink.c:1357) 
[ 35.102516][ T283] ? __pfx_netlink_unicast (net/netlink/af_netlink.c:1342) 
[ 35.102686][ T283] netlink_sendmsg (net/netlink/af_netlink.c:1901) 
[ 35.102852][ T283] ? __pfx_netlink_sendmsg (net/netlink/af_netlink.c:1820) 
[ 35.103017][ T283] ? __import_iovec (lib/iov_iter.c:1263 lib/iov_iter.c:1279) 
[ 35.103281][ T283] ____sys_sendmsg (net/socket.c:730 net/socket.c:745 net/socket.c:2597) 
[ 35.103447][ T283] ? __pfx_____sys_sendmsg (net/socket.c:2543) 
[ 35.103616][ T283] ? __pfx_copy_msghdr_from_user (net/socket.c:2523) 
[ 35.103816][ T283] ? __pfx_validate_chain (kernel/locking/lockdep.c:3824) 
[ 35.104086][ T283] ___sys_sendmsg (net/socket.c:2653) 
[ 35.104251][ T283] ? __pfx____sys_sendmsg (net/socket.c:2640) 
[ 35.104413][ T283] ? find_held_lock (kernel/locking/lockdep.c:5249) 
[ 35.104579][ T283] ? __lock_release (kernel/locking/lockdep.c:5435) 
[ 35.104842][ T283] ? __debug_check_no_obj_freed (lib/debugobjects.c:1001) 
[ 35.105045][ T283] ? __pfx___lock_release (kernel/locking/lockdep.c:5411) 
[ 35.105215][ T283] ? __pfx_do_raw_spin_lock (kernel/locking/spinlock_debug.c:114) 
[ 35.105385][ T283] ? lockdep_hardirqs_on_prepare (kernel/locking/lockdep.c:4299 kernel/locking/lockdep.c:4358) 
[ 35.105684][ T283] ? __fget_light (./include/linux/atomic/atomic-arch-fallback.h:479 ./include/linux/atomic/atomic-instrumented.h:50 fs/file.c:1145) 
[ 35.105854][ T283] __sys_sendmsg (./include/linux/file.h:34 net/socket.c:2682) 
[ 35.106018][ T283] ? __pfx___sys_sendmsg (net/socket.c:2668) 
[ 35.106179][ T283] ? __virt_addr_valid (./arch/x86/include/asm/preempt.h:94 ./include/linux/rcupdate.h:953 ./include/linux/mmzone.h:2034 arch/x86/mm/physaddr.c:65) 
[ 35.106457][ T283] do_syscall_64 (arch/x86/entry/common.c:52 arch/x86/entry/common.c:83) 
[ 35.106624][ T283] entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:130) 
[   35.106829][  T283] RIP: 0033:0x7fd06f5f87b7
[ 35.107015][ T283] 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)
[   35.107681][  T283] RSP: 002b:00007fffb376d228 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
[   35.108027][  T283] RAX: ffffffffffffffda RBX: 00007fffb376d960 RCX: 00007fd06f5f87b7
[   35.108280][  T283] RDX: 0000000000000000 RSI: 00007fffb376d290 RDI: 0000000000000005
[   35.108523][  T283] RBP: 0000000000000003 R08: 0000000000000003 R09: 0000000000000000
[   35.108872][  T283] R10: 000000003db46910 R11: 0000000000000246 R12: 0000000000000003


Finger prints:
lockdep_rcu_suspicious:br_get_link_af_size_filtered:br_info_notify:br_add_if:do_setlink