======================================
| [   65.138262][  T545] 1 lock held by ip/545:
| [ 65.138406][ T545] #0: ffffffffbb9d2948 (rtnl_mutex){+.+.}-{3:3}, at: rtnetlink_rcv_msg (net/core/rtnetlink.c:6645) 
| [   65.138782][  T545]
| [   65.138782][  T545] stack backtrace:
[   65.139289][  T545] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[   65.139689][  T545] Call Trace:
[   65.139836][  T545]  <TASK>
[ 65.139933][ T545] dump_stack_lvl (lib/dump_stack.c:122) 
[ 65.140124][ T545] lockdep_rcu_suspicious (./include/linux/context_tracking.h:153 kernel/locking/lockdep.c:6725) 
[ 65.140307][ T545] ? __pfx_br_handle_frame (net/bridge/br_input.c:326) 
[ 65.140497][ T545] br_get_link_af_size_filtered (net/bridge/br_private.h:930 net/bridge/br_private.h:940 net/bridge/br_netlink.c:105) 
[ 65.140724][ T545] br_info_notify (./include/linux/skbuff.h:1320 ./include/net/netlink.h:1015 net/bridge/br_netlink.c:645) 
[ 65.140917][ T545] ? lockdep_hardirqs_on_prepare (kernel/locking/lockdep.c:4299 kernel/locking/lockdep.c:4358) 
[ 65.141145][ T545] br_add_if (net/bridge/br_if.c:692) 
[ 65.141287][ T545] ? rtnl_is_locked (net/core/rtnetlink.c:164) 
[ 65.141467][ T545] ? netdev_master_upper_dev_get (net/core/dev.c:7102) 
[ 65.141693][ T545] do_setlink (net/core/rtnetlink.c:2907) 
[ 65.141878][ T545] ? is_bpf_text_address (./include/linux/rcupdate.h:336 ./include/linux/rcupdate.h:869 ./kernel/bpf/core.c:769) 
[ 65.142067][ T545] ? __pfx_do_setlink (net/core/rtnetlink.c:2778) 
[ 65.142246][ T545] ? is_bpf_text_address (./kernel/bpf/core.c:772) 
[ 65.142429][ T545] ? kernel_text_address (kernel/extable.c:97 kernel/extable.c:94) 
[ 65.142614][ T545] ? __kernel_text_address (kernel/extable.c:79) 
[ 65.142792][ T545] ? unwind_get_return_address (arch/x86/kernel/unwind_orc.c:369 arch/x86/kernel/unwind_orc.c:364) 
[ 65.142978][ T545] ? __pfx_stack_trace_consume_entry (kernel/stacktrace.c:83) 
[ 65.143202][ T545] ? arch_stack_walk (arch/x86/kernel/stacktrace.c:26) 
[ 65.143398][ T545] ? stack_trace_save (kernel/stacktrace.c:123) 
[ 65.143582][ T545] ? __pfx_stack_trace_save (kernel/stacktrace.c:114) 
[ 65.143762][ T545] ? __pfx_validate_nla (lib/nlattr.c:396) 
[ 65.143949][ T545] ? mark_lock (kernel/locking/lockdep.c:4655 (discriminator 3)) 
[ 65.144097][ T545] ? kasan_save_stack (mm/kasan/common.c:49) 
[ 65.144284][ T545] ? __nla_validate_parse (lib/nlattr.c:638) 
[ 65.144472][ T545] __rtnl_newlink (net/core/rtnetlink.c:3696) 
[ 65.144664][ T545] ? 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) 
[ 65.144850][ T545] ? __pfx___rtnl_newlink (net/core/rtnetlink.c:3557) 
[ 65.145049][ T545] ? lockdep_hardirqs_on_prepare (kernel/locking/lockdep.c:4299 kernel/locking/lockdep.c:4358) 
[ 65.145278][ T545] ? __create_object (mm/kmemleak.c:751) 
[ 65.145462][ T545] ? trace_kmalloc (./include/trace/events/kmem.h:54 (discriminator 52)) 
[ 65.145652][ T545] rtnl_newlink (net/core/rtnetlink.c:3744) 
[ 65.145801][ T545] rtnetlink_rcv_msg (net/core/rtnetlink.c:6647) 
[ 65.145989][ T545] ? __pfx_rtnetlink_rcv_msg (net/core/rtnetlink.c:6541) 
[ 65.146170][ T545] ? 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) 
[ 65.146350][ T545] ? mark_lock (kernel/locking/lockdep.c:4655 (discriminator 3)) 
[ 65.146495][ T545] ? __lock_acquire (kernel/locking/lockdep.c:5142) 
[ 65.146676][ T545] netlink_rcv_skb (net/netlink/af_netlink.c:2550) 
[ 65.146860][ T545] ? __pfx_rtnetlink_rcv_msg (net/core/rtnetlink.c:6541) 
[ 65.147040][ T545] ? __pfx_netlink_rcv_skb (net/netlink/af_netlink.c:2527) 
[ 65.147240][ T545] ? netlink_deliver_tap (./include/linux/rcupdate.h:336 ./include/linux/rcupdate.h:869 net/netlink/af_netlink.c:340) 
[ 65.147425][ T545] ? 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) 
[ 65.147608][ T545] netlink_unicast (net/netlink/af_netlink.c:1331 net/netlink/af_netlink.c:1357) 
[ 65.147792][ T545] ? __pfx_netlink_unicast (net/netlink/af_netlink.c:1342) 
[ 65.147972][ T545] ? find_held_lock (kernel/locking/lockdep.c:5249) 
[ 65.148162][ T545] netlink_sendmsg (net/netlink/af_netlink.c:1901) 
[ 65.148344][ T545] ? __pfx_netlink_sendmsg (net/netlink/af_netlink.c:1820) 
[ 65.148523][ T545] ? __might_fault (mm/memory.c:6388 mm/memory.c:6381) 
[ 65.148711][ T545] ? __import_iovec (lib/iov_iter.c:1263 lib/iov_iter.c:1279) 
[ 65.148902][ T545] ____sys_sendmsg (net/socket.c:730 net/socket.c:745 net/socket.c:2597) 
[ 65.149086][ T545] ? __pfx_____sys_sendmsg (net/socket.c:2543) 
[ 65.149265][ T545] ? __pfx_copy_msghdr_from_user (net/socket.c:2523) 
[ 65.149489][ T545] ? __pfx_validate_chain (kernel/locking/lockdep.c:3824) 
[ 65.149679][ T545] ___sys_sendmsg (net/socket.c:2653) 
[ 65.149864][ T545] ? __pfx____sys_sendmsg (net/socket.c:2640) 
[ 65.150046][ T545] ? find_held_lock (kernel/locking/lockdep.c:5249) 
[ 65.150233][ T545] ? __lock_release (kernel/locking/lockdep.c:5435) 
[ 65.150416][ T545] ? __debug_check_no_obj_freed (lib/debugobjects.c:1001) 
[ 65.150637][ T545] ? __pfx___lock_release (kernel/locking/lockdep.c:5411) 
[ 65.150829][ T545] ? __pfx_do_raw_spin_lock (kernel/locking/spinlock_debug.c:114) 
[ 65.151016][ T545] ? lockdep_hardirqs_on_prepare (kernel/locking/lockdep.c:4299 kernel/locking/lockdep.c:4358) 
[ 65.151243][ T545] ? __fget_light (./include/linux/atomic/atomic-arch-fallback.h:479 ./include/linux/atomic/atomic-instrumented.h:50 fs/file.c:1145) 
[ 65.151431][ T545] __sys_sendmsg (./include/linux/file.h:34 net/socket.c:2682) 
[ 65.151608][ T545] ? __pfx___sys_sendmsg (net/socket.c:2668) 
[ 65.151791][ T545] ? __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) 
[ 65.151991][ T545] do_syscall_64 (arch/x86/entry/common.c:52 arch/x86/entry/common.c:83) 
[ 65.152175][ T545] entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:130) 
[   65.152400][  T545] RIP: 0033:0x7fbe663a77b7
[ 65.152589][ T545] 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)
[   65.153276][  T545] RSP: 002b:00007fff40cd21f8 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
[   65.153549][  T545] RAX: ffffffffffffffda RBX: 00007fff40cd2920 RCX: 00007fbe663a77b7
[   65.153821][  T545] RDX: 0000000000000000 RSI: 00007fff40cd2260 RDI: 0000000000000005
[   65.154089][  T545] RBP: 0000000000000003 R08: 0000000000000003 R09: 0000000000000000
[   65.154358][  T545] R10: 00000000137cc910 R11: 0000000000000246 R12: 0000000000000003
[   65.154631][  T545] R13: 0000000066be9f44 R14: 0000000000496600 R15: 0000000000000000
| [   65.157043][  T545] 1 lock held by ip/545:
| [ 65.157204][ T545] #0: ffffffffbb9d2948 (rtnl_mutex){+.+.}-{3:3}, at: rtnetlink_rcv_msg (net/core/rtnetlink.c:6645) 
| [   65.157550][  T545]
| [   65.157550][  T545] stack backtrace:
[   65.158071][  T545] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[   65.158472][  T545] Call Trace:
[   65.158608][  T545]  <TASK>
[ 65.158703][ T545] dump_stack_lvl (lib/dump_stack.c:122) 
[ 65.158893][ T545] lockdep_rcu_suspicious (./include/linux/context_tracking.h:153 kernel/locking/lockdep.c:6725) 
[ 65.159071][ T545] br_get_link_af_size_filtered (net/bridge/br_private.h:453 net/bridge/br_private.h:940 net/bridge/br_netlink.c:105) 
[ 65.159295][ T545] br_info_notify (./include/linux/skbuff.h:1320 ./include/net/netlink.h:1015 net/bridge/br_netlink.c:645) 
[ 65.159472][ T545] ? lockdep_hardirqs_on_prepare (kernel/locking/lockdep.c:4299 kernel/locking/lockdep.c:4358) 
[ 65.159699][ T545] br_add_if (net/bridge/br_if.c:692) 
[ 65.159839][ T545] ? rtnl_is_locked (net/core/rtnetlink.c:164) 
[ 65.160018][ T545] ? netdev_master_upper_dev_get (net/core/dev.c:7102) 
[ 65.160244][ T545] do_setlink (net/core/rtnetlink.c:2907) 
[ 65.160426][ T545] ? is_bpf_text_address (./include/linux/rcupdate.h:336 ./include/linux/rcupdate.h:869 ./kernel/bpf/core.c:769) 
[ 65.160608][ T545] ? __pfx_do_setlink (net/core/rtnetlink.c:2778) 
[ 65.160804][ T545] ? is_bpf_text_address (./kernel/bpf/core.c:772) 
[ 65.160994][ T545] ? kernel_text_address (kernel/extable.c:97 kernel/extable.c:94) 
[ 65.161166][ T545] ? __kernel_text_address (kernel/extable.c:79) 
[ 65.161335][ T545] ? unwind_get_return_address (arch/x86/kernel/unwind_orc.c:369 arch/x86/kernel/unwind_orc.c:364) 
[ 65.161504][ T545] ? __pfx_stack_trace_consume_entry (kernel/stacktrace.c:83) 
[ 65.161718][ T545] ? arch_stack_walk (arch/x86/kernel/stacktrace.c:26) 
[ 65.161903][ T545] ? stack_trace_save (kernel/stacktrace.c:123) 
[ 65.162071][ T545] ? __pfx_stack_trace_save (kernel/stacktrace.c:114) 
[ 65.162240][ T545] ? __pfx_validate_nla (lib/nlattr.c:396) 
[ 65.162409][ T545] ? mark_lock (kernel/locking/lockdep.c:4655 (discriminator 3)) 
[ 65.162542][ T545] ? kasan_save_stack (mm/kasan/common.c:49) 
[ 65.162723][ T545] ? __nla_validate_parse (lib/nlattr.c:638) 
[ 65.162931][ T545] __rtnl_newlink (net/core/rtnetlink.c:3696) 
[ 65.163109][ T545] ? 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) 
[ 65.163283][ T545] ? __pfx___rtnl_newlink (net/core/rtnetlink.c:3557) 
[ 65.163463][ T545] ? lockdep_hardirqs_on_prepare (kernel/locking/lockdep.c:4299 kernel/locking/lockdep.c:4358) 
[ 65.163722][ T545] ? __create_object (mm/kmemleak.c:751) 
[ 65.163902][ T545] ? trace_kmalloc (./include/trace/events/kmem.h:54 (discriminator 52)) 
[ 65.164074][ T545] rtnl_newlink (net/core/rtnetlink.c:3744) 
[ 65.164201][ T545] rtnetlink_rcv_msg (net/core/rtnetlink.c:6647) 
[ 65.164375][ T545] ? __pfx_rtnetlink_rcv_msg (net/core/rtnetlink.c:6541) 
[ 65.164543][ T545] ? 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) 
[ 65.164716][ T545] ? mark_lock (kernel/locking/lockdep.c:4655 (discriminator 3)) 
[ 65.164847][ T545] ? __lock_acquire (kernel/locking/lockdep.c:5142) 
[ 65.165017][ T545] netlink_rcv_skb (net/netlink/af_netlink.c:2550) 
[ 65.165185][ T545] ? __pfx_rtnetlink_rcv_msg (net/core/rtnetlink.c:6541) 
[ 65.165357][ T545] ? __pfx_netlink_rcv_skb (net/netlink/af_netlink.c:2527) 
[ 65.165541][ T545] ? netlink_deliver_tap (./include/linux/rcupdate.h:336 ./include/linux/rcupdate.h:869 net/netlink/af_netlink.c:340) 
[ 65.165713][ T545] ? 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) 
[ 65.165881][ T545] netlink_unicast (net/netlink/af_netlink.c:1331 net/netlink/af_netlink.c:1357) 
[ 65.166058][ T545] ? __pfx_netlink_unicast (net/netlink/af_netlink.c:1342) 
[ 65.166227][ T545] ? find_held_lock (kernel/locking/lockdep.c:5249) 
[ 65.166405][ T545] netlink_sendmsg (net/netlink/af_netlink.c:1901) 
[ 65.166587][ T545] ? __pfx_netlink_sendmsg (net/netlink/af_netlink.c:1820) 
[ 65.166752][ T545] ? __might_fault (mm/memory.c:6388 mm/memory.c:6381) 
[ 65.166951][ T545] ? __import_iovec (lib/iov_iter.c:1263 lib/iov_iter.c:1279) 
[ 65.167139][ T545] ____sys_sendmsg (net/socket.c:730 net/socket.c:745 net/socket.c:2597) 
[ 65.167309][ T545] ? __pfx_____sys_sendmsg (net/socket.c:2543) 
[ 65.167478][ T545] ? __pfx_copy_msghdr_from_user (net/socket.c:2523) 
[ 65.167688][ T545] ? __pfx_validate_chain (kernel/locking/lockdep.c:3824) 
[ 65.167865][ T545] ___sys_sendmsg (net/socket.c:2653) 
[ 65.168035][ T545] ? __pfx____sys_sendmsg (net/socket.c:2640) 
[ 65.168199][ T545] ? find_held_lock (kernel/locking/lockdep.c:5249) 
[ 65.168378][ T545] ? __lock_release (kernel/locking/lockdep.c:5435) 
[ 65.168544][ T545] ? __debug_check_no_obj_freed (lib/debugobjects.c:1001) 
[ 65.168754][ T545] ? __pfx___lock_release (kernel/locking/lockdep.c:5411) 
[ 65.168927][ T545] ? __pfx_do_raw_spin_lock (kernel/locking/spinlock_debug.c:114) 
[ 65.169104][ T545] ? lockdep_hardirqs_on_prepare (kernel/locking/lockdep.c:4299 kernel/locking/lockdep.c:4358) 
[ 65.169312][ T545] ? __fget_light (./include/linux/atomic/atomic-arch-fallback.h:479 ./include/linux/atomic/atomic-instrumented.h:50 fs/file.c:1145) 
[ 65.169491][ T545] __sys_sendmsg (./include/linux/file.h:34 net/socket.c:2682) 
[ 65.169658][ T545] ? __pfx___sys_sendmsg (net/socket.c:2668) 
[ 65.169823][ T545] ? __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) 
[ 65.170011][ T545] do_syscall_64 (arch/x86/entry/common.c:52 arch/x86/entry/common.c:83) 
[ 65.170180][ T545] entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:130) 
[   65.170399][  T545] RIP: 0033:0x7fbe663a77b7
[ 65.170575][ T545] 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)
[   65.171168][  T545] RSP: 002b:00007fff40cd21f8 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
[   65.171424][  T545] RAX: ffffffffffffffda RBX: 00007fff40cd2920 RCX: 00007fbe663a77b7
[   65.171679][  T545] RDX: 0000000000000000 RSI: 00007fff40cd2260 RDI: 0000000000000005
[   65.171931][  T545] RBP: 0000000000000003 R08: 0000000000000003 R09: 0000000000000000
[   65.172366][  T545] R10: 00000000137cc910 R11: 0000000000000246 R12: 0000000000000003


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