======================================
| [ 204.376532][ T1468] #0: ffffffff865bc508 (rtnl_mutex){+.+.}-{3:3}, at: rtnetlink_rcv_msg (net/core/rtnetlink.c:6645) 
| [ 204.376876][ T1468] #1: ffff888008e3ac58 (&br->lock){+...}-{2:2}, at: br_add_if (net/bridge/br_if.c:683) bridge
| [  204.377292][ T1468]
| [  204.377292][ T1468] stack backtrace:
[  204.377813][ T1468] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[  204.378236][ T1468] Call Trace:
[  204.378391][ T1468]  <TASK>
[ 204.378498][ T1468] dump_stack_lvl (lib/dump_stack.c:122) 
[ 204.378702][ T1468] lockdep_rcu_suspicious (./include/linux/context_tracking.h:153 kernel/locking/lockdep.c:6725) 
[ 204.378891][ T1468] ? __pfx_br_handle_frame (net/bridge/br_input.c:326) bridge
[ 204.379163][ T1468] 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
[ 204.379427][ T1468] ? __timer_delete (./include/linux/list.h:971 ./include/linux/timer.h:147 kernel/time/timer.c:1426) 
[ 204.379615][ T1468] ? __timer_delete (./include/linux/list.h:971 ./include/linux/timer.h:147 kernel/time/timer.c:1426) 
[ 204.379804][ T1468] br_info_notify (./include/linux/skbuff.h:1320 ./include/net/netlink.h:1015 net/bridge/br_netlink.c:645) bridge
[ 204.380030][ T1468] br_make_forwarding (net/bridge/br_stp.c:465) bridge
[ 204.380246][ T1468] br_port_state_selection (net/bridge/br_stp.c:495) bridge
[ 204.380517][ T1468] br_stp_enable_port (net/bridge/br_stp_if.c:95) bridge
[ 204.380736][ T1468] br_add_if (net/bridge/br_if.c:687) bridge
[ 204.380971][ T1468] do_setlink (net/core/rtnetlink.c:2907) 
[ 204.381170][ T1468] ? is_bpf_text_address (./include/linux/rcupdate.h:336 ./include/linux/rcupdate.h:869 ./kernel/bpf/core.c:769) 
[ 204.381360][ T1468] ? __pfx_do_setlink (net/core/rtnetlink.c:2778) 
[ 204.381548][ T1468] ? is_bpf_text_address (./kernel/bpf/core.c:772) 
[ 204.381737][ T1468] ? kernel_text_address (kernel/extable.c:97 kernel/extable.c:94) 
[ 204.381927][ T1468] ? __kernel_text_address (kernel/extable.c:79) 
[ 204.382112][ T1468] ? unwind_get_return_address (arch/x86/kernel/unwind_orc.c:369 arch/x86/kernel/unwind_orc.c:364) 
[ 204.382310][ T1468] ? __pfx_stack_trace_consume_entry (kernel/stacktrace.c:83) 
[ 204.382550][ T1468] ? arch_stack_walk (arch/x86/kernel/stacktrace.c:26) 
[ 204.382753][ T1468] ? stack_trace_save (kernel/stacktrace.c:123) 
[ 204.382942][ T1468] ? __pfx_stack_trace_save (kernel/stacktrace.c:114) 
[ 204.383130][ T1468] ? __pfx_validate_nla (lib/nlattr.c:396) 
[ 204.383324][ T1468] ? mark_lock (kernel/locking/lockdep.c:4655 (discriminator 3)) 
[ 204.383473][ T1468] ? kasan_save_stack (mm/kasan/common.c:49) 
[ 204.383665][ T1468] ? __nla_validate_parse (lib/nlattr.c:638) 
[ 204.383860][ T1468] __rtnl_newlink (net/core/rtnetlink.c:3696) 
[ 204.384060][ T1468] ? 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) 
[ 204.384252][ T1468] ? __pfx___rtnl_newlink (net/core/rtnetlink.c:3557) 
[ 204.384447][ T1468] ? lockdep_hardirqs_on_prepare (kernel/locking/lockdep.c:4299 kernel/locking/lockdep.c:4358) 
[ 204.384680][ T1468] ? __create_object (mm/kmemleak.c:751) 
[ 204.384872][ T1468] ? trace_kmalloc (./include/trace/events/kmem.h:54 (discriminator 52)) 
[ 204.385066][ T1468] rtnl_newlink (net/core/rtnetlink.c:3744) 
[ 204.385211][ T1468] rtnetlink_rcv_msg (net/core/rtnetlink.c:6647) 
[ 204.385401][ T1468] ? __pfx_rtnetlink_rcv_msg (net/core/rtnetlink.c:6541) 
[ 204.385592][ T1468] ? 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) 
[ 204.385779][ T1468] ? mark_lock (kernel/locking/lockdep.c:4655 (discriminator 3)) 
[ 204.385933][ T1468] ? __lock_acquire (kernel/locking/lockdep.c:5142) 
[ 204.386131][ T1468] netlink_rcv_skb (net/netlink/af_netlink.c:2550) 
[ 204.386319][ T1468] ? __pfx_rtnetlink_rcv_msg (net/core/rtnetlink.c:6541) 
[ 204.386506][ T1468] ? __pfx_netlink_rcv_skb (net/netlink/af_netlink.c:2527) 
[ 204.386717][ T1468] ? netlink_deliver_tap (./include/linux/rcupdate.h:336 ./include/linux/rcupdate.h:869 net/netlink/af_netlink.c:340) 
[ 204.386903][ T1468] ? 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) 
[ 204.387099][ T1468] netlink_unicast (net/netlink/af_netlink.c:1331 net/netlink/af_netlink.c:1357) 
[ 204.387290][ T1468] ? __pfx_netlink_unicast (net/netlink/af_netlink.c:1342) 
[ 204.387482][ T1468] ? find_held_lock (kernel/locking/lockdep.c:5249) 
[ 204.387680][ T1468] netlink_sendmsg (net/netlink/af_netlink.c:1901) 
[ 204.387873][ T1468] ? __pfx_netlink_sendmsg (net/netlink/af_netlink.c:1820) 
[ 204.388057][ T1468] ? __might_fault (mm/memory.c:6388 mm/memory.c:6381) 
[ 204.388246][ T1468] ? __import_iovec (lib/iov_iter.c:1263 lib/iov_iter.c:1279) 
[ 204.388446][ T1468] ____sys_sendmsg (net/socket.c:730 net/socket.c:745 net/socket.c:2597) 
[ 204.388635][ T1468] ? __pfx_____sys_sendmsg (net/socket.c:2543) 
[ 204.388826][ T1468] ? __pfx_copy_msghdr_from_user (net/socket.c:2523) 
[ 204.389059][ T1468] ? __pfx_validate_chain (kernel/locking/lockdep.c:3824) 
[ 204.389258][ T1468] ___sys_sendmsg (net/socket.c:2653) 
[ 204.389448][ T1468] ? __pfx____sys_sendmsg (net/socket.c:2640) 
[ 204.389635][ T1468] ? find_held_lock (kernel/locking/lockdep.c:5249) 
[ 204.389826][ T1468] ? __lock_release (kernel/locking/lockdep.c:5435) 
[ 204.390011][ T1468] ? __debug_check_no_obj_freed (lib/debugobjects.c:1001) 
[ 204.390248][ T1468] ? __pfx___lock_release (kernel/locking/lockdep.c:5411) 
[ 204.390439][ T1468] ? __pfx_do_raw_spin_lock (kernel/locking/spinlock_debug.c:114) 
[ 204.390641][ T1468] ? lockdep_hardirqs_on_prepare (kernel/locking/lockdep.c:4299 kernel/locking/lockdep.c:4358) 
[ 204.390876][ T1468] ? __fget_light (./include/linux/atomic/atomic-arch-fallback.h:479 ./include/linux/atomic/atomic-instrumented.h:50 fs/file.c:1145) 
[ 204.391070][ T1468] __sys_sendmsg (./include/linux/file.h:34 net/socket.c:2682) 
[ 204.391257][ T1468] ? __pfx___sys_sendmsg (net/socket.c:2668) 
[ 204.391444][ T1468] ? __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) 
[ 204.391655][ T1468] do_syscall_64 (arch/x86/entry/common.c:52 arch/x86/entry/common.c:83) 
[ 204.391851][ T1468] entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:130) 
[  204.392085][ T1468] RIP: 0033:0x7f65e87067b7
[ 204.392280][ T1468] 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)
[  204.392915][ T1468] RSP: 002b:00007fffbbf49558 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
[  204.393211][ T1468] RAX: ffffffffffffffda RBX: 00007fffbbf49c80 RCX: 00007f65e87067b7
[  204.393489][ T1468] RDX: 0000000000000000 RSI: 00007fffbbf495c0 RDI: 0000000000000005
[  204.393767][ T1468] RBP: 0000000000000004 R08: 0000000000000003 R09: 0000000000000000
[  204.394046][ T1468] R10: 00000000186d5910 R11: 0000000000000246 R12: 0000000000000004
[  204.394324][ T1468] R13: 0000000066bea252 R14: 0000000000496600 R15: 0000000000000000
| [ 204.396807][ T1468] #0: ffffffff865bc508 (rtnl_mutex){+.+.}-{3:3}, at: rtnetlink_rcv_msg (net/core/rtnetlink.c:6645) 
| [ 204.397150][ T1468] #1: ffff888008e3ac58 (&br->lock){+...}-{2:2}, at: br_add_if (net/bridge/br_if.c:683) bridge
| [  204.397536][ T1468]
| [  204.397536][ T1468] stack backtrace:
[  204.398062][ T1468] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[  204.398476][ T1468] Call Trace:
[  204.398621][ T1468]  <TASK>
[ 204.398722][ T1468] dump_stack_lvl (lib/dump_stack.c:122) 
[ 204.398917][ T1468] lockdep_rcu_suspicious (./include/linux/context_tracking.h:153 kernel/locking/lockdep.c:6725) 
[ 204.399109][ T1468] ? __pfx_br_handle_frame (net/bridge/br_input.c:326) bridge
[ 204.399374][ T1468] 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
[ 204.399640][ T1468] ? __timer_delete (./include/linux/list.h:971 ./include/linux/timer.h:147 kernel/time/timer.c:1426) 
[ 204.399827][ T1468] ? __timer_delete (./include/linux/list.h:971 ./include/linux/timer.h:147 kernel/time/timer.c:1426) 
[ 204.400018][ T1468] br_info_notify (./include/linux/skbuff.h:1320 ./include/net/netlink.h:1015 net/bridge/br_netlink.c:645) bridge
[ 204.400241][ T1468] br_make_forwarding (net/bridge/br_stp.c:465) bridge
[ 204.400459][ T1468] br_port_state_selection (net/bridge/br_stp.c:495) bridge
[ 204.400744][ T1468] br_stp_enable_port (net/bridge/br_stp_if.c:95) bridge
[ 204.400961][ T1468] br_add_if (net/bridge/br_if.c:687) bridge
[ 204.401188][ T1468] do_setlink (net/core/rtnetlink.c:2907) 
[ 204.401386][ T1468] ? is_bpf_text_address (./include/linux/rcupdate.h:336 ./include/linux/rcupdate.h:869 ./kernel/bpf/core.c:769) 
[ 204.401577][ T1468] ? __pfx_do_setlink (net/core/rtnetlink.c:2778) 
[ 204.401765][ T1468] ? is_bpf_text_address (./kernel/bpf/core.c:772) 
[ 204.401950][ T1468] ? kernel_text_address (kernel/extable.c:97 kernel/extable.c:94) 
[ 204.402137][ T1468] ? __kernel_text_address (kernel/extable.c:79) 
[ 204.402332][ T1468] ? unwind_get_return_address (arch/x86/kernel/unwind_orc.c:369 arch/x86/kernel/unwind_orc.c:364) 
[ 204.402522][ T1468] ? __pfx_stack_trace_consume_entry (kernel/stacktrace.c:83) 
[ 204.402755][ T1468] ? arch_stack_walk (arch/x86/kernel/stacktrace.c:26) 
[ 204.402955][ T1468] ? stack_trace_save (kernel/stacktrace.c:123) 
[ 204.403147][ T1468] ? __pfx_stack_trace_save (kernel/stacktrace.c:114) 
[ 204.403336][ T1468] ? __pfx_validate_nla (lib/nlattr.c:396) 
[ 204.403531][ T1468] ? mark_lock (kernel/locking/lockdep.c:4655 (discriminator 3)) 
[ 204.403677][ T1468] ? kasan_save_stack (mm/kasan/common.c:49) 
[ 204.403873][ T1468] ? __nla_validate_parse (lib/nlattr.c:638) 
[ 204.404072][ T1468] __rtnl_newlink (net/core/rtnetlink.c:3696) 
[ 204.404269][ T1468] ? 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) 
[ 204.404458][ T1468] ? __pfx___rtnl_newlink (net/core/rtnetlink.c:3557) 
[ 204.404657][ T1468] ? lockdep_hardirqs_on_prepare (kernel/locking/lockdep.c:4299 kernel/locking/lockdep.c:4358) 
[ 204.404895][ T1468] ? __create_object (mm/kmemleak.c:751) 
[ 204.405086][ T1468] ? trace_kmalloc (./include/trace/events/kmem.h:54 (discriminator 52)) 
[ 204.405283][ T1468] rtnl_newlink (net/core/rtnetlink.c:3744) 
[ 204.405431][ T1468] rtnetlink_rcv_msg (net/core/rtnetlink.c:6647) 
[ 204.405626][ T1468] ? __pfx_rtnetlink_rcv_msg (net/core/rtnetlink.c:6541) 
[ 204.405813][ T1468] ? 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) 
[ 204.406003][ T1468] ? mark_lock (kernel/locking/lockdep.c:4655 (discriminator 3)) 
[ 204.406160][ T1468] ? __lock_acquire (kernel/locking/lockdep.c:5142) 
[ 204.406351][ T1468] netlink_rcv_skb (net/netlink/af_netlink.c:2550) 
[ 204.406550][ T1468] ? __pfx_rtnetlink_rcv_msg (net/core/rtnetlink.c:6541) 
[ 204.406740][ T1468] ? __pfx_netlink_rcv_skb (net/netlink/af_netlink.c:2527) 
[ 204.406952][ T1468] ? netlink_deliver_tap (./include/linux/rcupdate.h:336 ./include/linux/rcupdate.h:869 net/netlink/af_netlink.c:340) 
[ 204.407156][ T1468] ? 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) 
[ 204.407350][ T1468] netlink_unicast (net/netlink/af_netlink.c:1331 net/netlink/af_netlink.c:1357) 
[ 204.407544][ T1468] ? __pfx_netlink_unicast (net/netlink/af_netlink.c:1342) 
[ 204.407734][ T1468] ? find_held_lock (kernel/locking/lockdep.c:5249) 
[ 204.407927][ T1468] netlink_sendmsg (net/netlink/af_netlink.c:1901) 
[ 204.408123][ T1468] ? __pfx_netlink_sendmsg (net/netlink/af_netlink.c:1820) 
[ 204.408310][ T1468] ? __might_fault (mm/memory.c:6388 mm/memory.c:6381) 
[ 204.408704][ T1468] ? __import_iovec (lib/iov_iter.c:1263 lib/iov_iter.c:1279) 
[ 204.408906][ T1468] ____sys_sendmsg (net/socket.c:730 net/socket.c:745 net/socket.c:2597) 
[ 204.409103][ T1468] ? __pfx_____sys_sendmsg (net/socket.c:2543) 
[ 204.409292][ T1468] ? __pfx_copy_msghdr_from_user (net/socket.c:2523) 
[ 204.409525][ T1468] ? __pfx_validate_chain (kernel/locking/lockdep.c:3824) 
[ 204.409725][ T1468] ___sys_sendmsg (net/socket.c:2653) 
[ 204.409919][ T1468] ? __pfx____sys_sendmsg (net/socket.c:2640) 
[ 204.410107][ T1468] ? find_held_lock (kernel/locking/lockdep.c:5249) 
[ 204.410297][ T1468] ? __lock_release (kernel/locking/lockdep.c:5435) 
[ 204.410494][ T1468] ? __debug_check_no_obj_freed (lib/debugobjects.c:1001) 
[ 204.410731][ T1468] ? __pfx___lock_release (kernel/locking/lockdep.c:5411) 
[ 204.410921][ T1468] ? __pfx_do_raw_spin_lock (kernel/locking/spinlock_debug.c:114) 
[ 204.411116][ T1468] ? lockdep_hardirqs_on_prepare (kernel/locking/lockdep.c:4299 kernel/locking/lockdep.c:4358) 
[ 204.411360][ T1468] ? __fget_light (./include/linux/atomic/atomic-arch-fallback.h:479 ./include/linux/atomic/atomic-instrumented.h:50 fs/file.c:1145) 
[ 204.411560][ T1468] __sys_sendmsg (./include/linux/file.h:34 net/socket.c:2682) 
[ 204.411753][ T1468] ? __pfx___sys_sendmsg (net/socket.c:2668) 
[ 204.411944][ T1468] ? __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) 
[ 204.412156][ T1468] do_syscall_64 (arch/x86/entry/common.c:52 arch/x86/entry/common.c:83) 
[ 204.412347][ T1468] entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:130) 
[  204.412581][ T1468] RIP: 0033:0x7f65e87067b7
[ 204.412783][ T1468] 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)
[  204.413423][ T1468] RSP: 002b:00007fffbbf49558 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
[  204.413708][ T1468] RAX: ffffffffffffffda RBX: 00007fffbbf49c80 RCX: 00007f65e87067b7
[  204.413995][ T1468] RDX: 0000000000000000 RSI: 00007fffbbf495c0 RDI: 0000000000000005
[  204.414271][ T1468] RBP: 0000000000000004 R08: 0000000000000003 R09: 0000000000000000
[  204.414551][ T1468] R10: 00000000186d5910 R11: 0000000000000246 R12: 0000000000000004
[  204.414840][ T1468] R13: 0000000066bea252 R14: 0000000000496600 R15: 0000000000000000
| [ 204.417314][ T1468] #0: ffffffff865bc508 (rtnl_mutex){+.+.}-{3:3}, at: rtnetlink_rcv_msg (net/core/rtnetlink.c:6645) 
| [ 204.417653][ T1468] #1: ffff888008e3ac58 (&br->lock){+...}-{2:2}, at: br_add_if (net/bridge/br_if.c:683) bridge
| [  204.418025][ T1468]
| [  204.418025][ T1468] stack backtrace:
[  204.418555][ T1468] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[  204.418968][ T1468] Call Trace:
[  204.419111][ T1468]  <TASK>
[ 204.419218][ T1468] dump_stack_lvl (lib/dump_stack.c:122) 
[ 204.419412][ T1468] lockdep_rcu_suspicious (./include/linux/context_tracking.h:153 kernel/locking/lockdep.c:6725) 
[ 204.419604][ T1468] ? __pfx_br_handle_frame (net/bridge/br_input.c:326) bridge
[ 204.419877][ T1468] br_get_link_af_size_filtered (net/bridge/br_private.h:1611 net/bridge/br_private.h:1608 net/bridge/br_netlink.c:107) bridge
[ 204.420139][ T1468] ? __timer_delete (./include/linux/list.h:971 ./include/linux/timer.h:147 kernel/time/timer.c:1426) 
[ 204.420325][ T1468] ? __timer_delete (./include/linux/list.h:971 ./include/linux/timer.h:147 kernel/time/timer.c:1426) 
[ 204.420521][ T1468] br_info_notify (./include/linux/skbuff.h:1320 ./include/net/netlink.h:1015 net/bridge/br_netlink.c:645) bridge
[ 204.420747][ T1468] br_make_forwarding (net/bridge/br_stp.c:465) bridge
[ 204.420973][ T1468] br_port_state_selection (net/bridge/br_stp.c:495) bridge
[ 204.421241][ T1468] br_stp_enable_port (net/bridge/br_stp_if.c:95) bridge
[ 204.421458][ T1468] br_add_if (net/bridge/br_if.c:687) bridge
[ 204.421690][ T1468] do_setlink (net/core/rtnetlink.c:2907) 
[ 204.421883][ T1468] ? is_bpf_text_address (./include/linux/rcupdate.h:336 ./include/linux/rcupdate.h:869 ./kernel/bpf/core.c:769) 
[ 204.422074][ T1468] ? __pfx_do_setlink (net/core/rtnetlink.c:2778) 
[ 204.422262][ T1468] ? is_bpf_text_address (./kernel/bpf/core.c:772) 
[ 204.422461][ T1468] ? kernel_text_address (kernel/extable.c:97 kernel/extable.c:94) 
[ 204.422650][ T1468] ? __kernel_text_address (kernel/extable.c:79) 
[ 204.422842][ T1468] ? unwind_get_return_address (arch/x86/kernel/unwind_orc.c:369 arch/x86/kernel/unwind_orc.c:364) 
[ 204.423028][ T1468] ? __pfx_stack_trace_consume_entry (kernel/stacktrace.c:83) 
[ 204.423264][ T1468] ? arch_stack_walk (arch/x86/kernel/stacktrace.c:26) 
[ 204.423464][ T1468] ? stack_trace_save (kernel/stacktrace.c:123) 
[ 204.423654][ T1468] ? __pfx_stack_trace_save (kernel/stacktrace.c:114) 
[ 204.423842][ T1468] ? __pfx_validate_nla (lib/nlattr.c:396) 
[ 204.424039][ T1468] ? mark_lock (kernel/locking/lockdep.c:4655 (discriminator 3)) 
[ 204.424187][ T1468] ? kasan_save_stack (mm/kasan/common.c:49) 
[ 204.424382][ T1468] ? __nla_validate_parse (lib/nlattr.c:638) 
[ 204.424576][ T1468] __rtnl_newlink (net/core/rtnetlink.c:3696) 
[ 204.424771][ T1468] ? 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) 
[ 204.424964][ T1468] ? __pfx___rtnl_newlink (net/core/rtnetlink.c:3557) 
[ 204.425159][ T1468] ? lockdep_hardirqs_on_prepare (kernel/locking/lockdep.c:4299 kernel/locking/lockdep.c:4358) 
[ 204.425399][ T1468] ? __create_object (mm/kmemleak.c:751) 
[ 204.425597][ T1468] ? trace_kmalloc (./include/trace/events/kmem.h:54 (discriminator 52)) 
[ 204.425792][ T1468] rtnl_newlink (net/core/rtnetlink.c:3744) 
[ 204.425941][ T1468] rtnetlink_rcv_msg (net/core/rtnetlink.c:6647) 
[ 204.426136][ T1468] ? __pfx_rtnetlink_rcv_msg (net/core/rtnetlink.c:6541) 
[ 204.426330][ T1468] ? 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) 
[ 204.426521][ T1468] ? mark_lock (kernel/locking/lockdep.c:4655 (discriminator 3)) 
[ 204.426667][ T1468] ? __lock_acquire (kernel/locking/lockdep.c:5142) 
[ 204.426861][ T1468] netlink_rcv_skb (net/netlink/af_netlink.c:2550) 
[ 204.427050][ T1468] ? __pfx_rtnetlink_rcv_msg (net/core/rtnetlink.c:6541) 
[ 204.427247][ T1468] ? __pfx_netlink_rcv_skb (net/netlink/af_netlink.c:2527) 
[ 204.427455][ T1468] ? netlink_deliver_tap (./include/linux/rcupdate.h:336 ./include/linux/rcupdate.h:869 net/netlink/af_netlink.c:340) 
[ 204.427647][ T1468] ? 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) 
[ 204.427843][ T1468] netlink_unicast (net/netlink/af_netlink.c:1331 net/netlink/af_netlink.c:1357) 
[ 204.428036][ T1468] ? __pfx_netlink_unicast (net/netlink/af_netlink.c:1342) 
[ 204.428232][ T1468] ? find_held_lock (kernel/locking/lockdep.c:5249) 
[ 204.428426][ T1468] netlink_sendmsg (net/netlink/af_netlink.c:1901) 
[ 204.428624][ T1468] ? __pfx_netlink_sendmsg (net/netlink/af_netlink.c:1820) 
[ 204.428815][ T1468] ? __might_fault (mm/memory.c:6388 mm/memory.c:6381) 
[ 204.429012][ T1468] ? __import_iovec (lib/iov_iter.c:1263 lib/iov_iter.c:1279) 
[ 204.429209][ T1468] ____sys_sendmsg (net/socket.c:730 net/socket.c:745 net/socket.c:2597) 
[ 204.429403][ T1468] ? __pfx_____sys_sendmsg (net/socket.c:2543) 
[ 204.429590][ T1468] ? __pfx_copy_msghdr_from_user (net/socket.c:2523) 
[ 204.429835][ T1468] ? __pfx_validate_chain (kernel/locking/lockdep.c:3824) 
[ 204.430035][ T1468] ___sys_sendmsg (net/socket.c:2653) 
[ 204.430227][ T1468] ? __pfx____sys_sendmsg (net/socket.c:2640) 
[ 204.430424][ T1468] ? find_held_lock (kernel/locking/lockdep.c:5249) 
[ 204.430615][ T1468] ? __lock_release (kernel/locking/lockdep.c:5435) 
[ 204.430806][ T1468] ? __debug_check_no_obj_freed (lib/debugobjects.c:1001) 
[ 204.431041][ T1468] ? __pfx___lock_release (kernel/locking/lockdep.c:5411) 
[ 204.431230][ T1468] ? __pfx_do_raw_spin_lock (kernel/locking/spinlock_debug.c:114) 
[ 204.431426][ T1468] ? lockdep_hardirqs_on_prepare (kernel/locking/lockdep.c:4299 kernel/locking/lockdep.c:4358) 
[ 204.431668][ T1468] ? __fget_light (./include/linux/atomic/atomic-arch-fallback.h:479 ./include/linux/atomic/atomic-instrumented.h:50 fs/file.c:1145) 
[ 204.431864][ T1468] __sys_sendmsg (./include/linux/file.h:34 net/socket.c:2682) 
[ 204.432060][ T1468] ? __pfx___sys_sendmsg (net/socket.c:2668) 
[ 204.432246][ T1468] ? __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) 
[ 204.432464][ T1468] do_syscall_64 (arch/x86/entry/common.c:52 arch/x86/entry/common.c:83) 
[ 204.432656][ T1468] entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:130) 
[  204.432893][ T1468] RIP: 0033:0x7f65e87067b7
[ 204.433089][ T1468] 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)
[  204.433744][ T1468] RSP: 002b:00007fffbbf49558 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
[  204.434029][ T1468] RAX: ffffffffffffffda RBX: 00007fffbbf49c80 RCX: 00007f65e87067b7
[  204.434307][ T1468] RDX: 0000000000000000 RSI: 00007fffbbf495c0 RDI: 0000000000000005
[  204.434587][ T1468] RBP: 0000000000000004 R08: 0000000000000003 R09: 0000000000000000
[  204.434875][ T1468] R10: 00000000186d5910 R11: 0000000000000246 R12: 0000000000000004


Finger prints:
lockdep_rcu_suspicious:br_get_link_af_size_filtered:br_info_notify:br_make_forwarding:br_port_state_selection