======================================
| [  164.089603][  T810] 1 lock held by ip/810:
| [ 164.089736][ T810] #0: ffffffff8f3c5cc8 (rtnl_mutex){+.+.}-{3:3}, at: rtnetlink_rcv_msg (net/core/rtnetlink.c:6645) 
| [  164.090176][  T810]
| [  164.090176][  T810] stack backtrace:
[  164.090662][  T810] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[  164.091087][  T810] Call Trace:
[  164.091224][  T810]  <TASK>
[ 164.091316][ T810] dump_stack_lvl (lib/dump_stack.c:122) 
[ 164.091501][ T810] lockdep_rcu_suspicious (./include/linux/context_tracking.h:153 kernel/locking/lockdep.c:6725) 
[ 164.091680][ T810] ? __pfx_br_handle_frame (net/bridge/br_input.c:326) bridge
[ 164.091944][ T810] 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
[ 164.092438][ T810] br_info_notify (./include/linux/skbuff.h:1320 ./include/net/netlink.h:1015 net/bridge/br_netlink.c:645) bridge
[ 164.092646][ T810] ? lockdep_hardirqs_on_prepare (kernel/locking/lockdep.c:4299 kernel/locking/lockdep.c:4358) 
[ 164.092885][ T810] br_add_if (net/bridge/br_if.c:692) bridge
[ 164.093099][ T810] ? rtnl_is_locked (net/core/rtnetlink.c:164) 
[ 164.093286][ T810] ? netdev_master_upper_dev_get (net/core/dev.c:7102) 
[ 164.093514][ T810] do_setlink (net/core/rtnetlink.c:2907) 
[ 164.093703][ T810] ? is_bpf_text_address (./include/linux/rcupdate.h:336 ./include/linux/rcupdate.h:869 ./kernel/bpf/core.c:769) 
[ 164.093887][ T810] ? __pfx_do_setlink (net/core/rtnetlink.c:2778) 
[ 164.094069][ T810] ? is_bpf_text_address (./kernel/bpf/core.c:772) 
[ 164.094248][ T810] ? kernel_text_address (kernel/extable.c:97 kernel/extable.c:94) 
[ 164.094433][ T810] ? __kernel_text_address (kernel/extable.c:79) 
[ 164.094612][ T810] ? unwind_get_return_address (arch/x86/kernel/unwind_orc.c:369 arch/x86/kernel/unwind_orc.c:364) 
[ 164.094792][ T810] ? __pfx_stack_trace_consume_entry (kernel/stacktrace.c:83) 
[ 164.095032][ T810] ? arch_stack_walk (arch/x86/kernel/stacktrace.c:26) 
[ 164.095226][ T810] ? stack_trace_save (kernel/stacktrace.c:123) 
[ 164.095406][ T810] ? __pfx_stack_trace_save (kernel/stacktrace.c:114) 
[ 164.095585][ T810] ? __pfx_validate_nla (lib/nlattr.c:396) 
[ 164.095767][ T810] ? mark_lock (kernel/locking/lockdep.c:4655 (discriminator 3)) 
[ 164.095907][ T810] ? kasan_save_stack (mm/kasan/common.c:49) 
[ 164.096093][ T810] ? __nla_validate_parse (lib/nlattr.c:638) 
[ 164.096280][ T810] __rtnl_newlink (net/core/rtnetlink.c:3696) 
[ 164.096468][ T810] ? 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) 
[ 164.096655][ T810] ? __pfx___rtnl_newlink (net/core/rtnetlink.c:3557) 
[ 164.096841][ T810] ? lockdep_hardirqs_on_prepare (kernel/locking/lockdep.c:4299 kernel/locking/lockdep.c:4358) 
[ 164.097075][ T810] ? __create_object (mm/kmemleak.c:751) 
[ 164.097261][ T810] ? trace_kmalloc (./include/trace/events/kmem.h:54 (discriminator 52)) 
[ 164.097451][ T810] rtnl_newlink (net/core/rtnetlink.c:3744) 
[ 164.097589][ T810] rtnetlink_rcv_msg (net/core/rtnetlink.c:6647) 
[ 164.097772][ T810] ? __pfx_rtnetlink_rcv_msg (net/core/rtnetlink.c:6541) 
[ 164.097951][ T810] ? 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) 
[ 164.098138][ T810] ? mark_lock (kernel/locking/lockdep.c:4655 (discriminator 3)) 
[ 164.098305][ T810] ? __lock_acquire (kernel/locking/lockdep.c:5142) 
[ 164.098489][ T810] netlink_rcv_skb (net/netlink/af_netlink.c:2550) 
[ 164.098689][ T810] ? __pfx_rtnetlink_rcv_msg (net/core/rtnetlink.c:6541) 
[ 164.098916][ T810] ? __pfx_netlink_rcv_skb (net/netlink/af_netlink.c:2527) 
[ 164.099112][ T810] ? netlink_deliver_tap (./include/linux/rcupdate.h:336 ./include/linux/rcupdate.h:869 net/netlink/af_netlink.c:340) 
[ 164.099317][ T810] ? 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) 
[ 164.099500][ T810] netlink_unicast (net/netlink/af_netlink.c:1331 net/netlink/af_netlink.c:1357) 
[ 164.099692][ T810] ? __pfx_netlink_unicast (net/netlink/af_netlink.c:1342) 
[ 164.099879][ T810] netlink_sendmsg (net/netlink/af_netlink.c:1901) 
[ 164.100064][ T810] ? __pfx_netlink_sendmsg (net/netlink/af_netlink.c:1820) 
[ 164.100274][ T810] ? __import_iovec (lib/iov_iter.c:1263 lib/iov_iter.c:1279) 
[ 164.100475][ T810] ____sys_sendmsg (net/socket.c:730 net/socket.c:745 net/socket.c:2597) 
[ 164.100700][ T810] ? __pfx_____sys_sendmsg (net/socket.c:2543) 
[ 164.100884][ T810] ? __pfx_copy_msghdr_from_user (net/socket.c:2523) 
[ 164.101107][ T810] ? __pfx_validate_chain (kernel/locking/lockdep.c:3824) 
[ 164.101307][ T810] ___sys_sendmsg (net/socket.c:2653) 
[ 164.101522][ T810] ? __pfx____sys_sendmsg (net/socket.c:2640) 
[ 164.101704][ T810] ? find_held_lock (kernel/locking/lockdep.c:5249) 
[ 164.101902][ T810] ? __lock_release (kernel/locking/lockdep.c:5435) 
[ 164.102103][ T810] ? __debug_check_no_obj_freed (lib/debugobjects.c:1001) 
[ 164.102353][ T810] ? __pfx___lock_release (kernel/locking/lockdep.c:5411) 
[ 164.102536][ T810] ? __pfx_do_raw_spin_lock (kernel/locking/spinlock_debug.c:114) 
[ 164.102736][ T810] ? lockdep_hardirqs_on_prepare (kernel/locking/lockdep.c:4299 kernel/locking/lockdep.c:4358) 
[ 164.102989][ T810] ? __fget_light (./include/linux/atomic/atomic-arch-fallback.h:479 ./include/linux/atomic/atomic-instrumented.h:50 fs/file.c:1145) 
[ 164.103203][ T810] __sys_sendmsg (./include/linux/file.h:34 net/socket.c:2682) 
[ 164.103408][ T810] ? __pfx___sys_sendmsg (net/socket.c:2668) 
[ 164.103605][ T810] ? __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) 
[ 164.103821][ T810] do_syscall_64 (arch/x86/entry/common.c:52 arch/x86/entry/common.c:83) 
[ 164.104007][ T810] entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:130) 
[  164.104247][  T810] RIP: 0033:0x7f933d1b07b7
[ 164.104468][ T810] 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)
[  164.105095][  T810] RSP: 002b:00007ffc975f8f98 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
[  164.105379][  T810] RAX: ffffffffffffffda RBX: 00007ffc975f96d0 RCX: 00007f933d1b07b7
[  164.105670][  T810] RDX: 0000000000000000 RSI: 00007ffc975f9000 RDI: 0000000000000005
[  164.105974][  T810] RBP: 0000000000000003 R08: 0000000000000003 R09: 0000000000000000
[  164.106262][  T810] R10: 000000003848e910 R11: 0000000000000246 R12: 0000000000000003
[  164.106546][  T810] R13: 0000000066bea574 R14: 0000000000496600 R15: 0000000000000000
| [  164.109004][  T810] 1 lock held by ip/810:
| [ 164.109157][ T810] #0: ffffffff8f3c5cc8 (rtnl_mutex){+.+.}-{3:3}, at: rtnetlink_rcv_msg (net/core/rtnetlink.c:6645) 
| [  164.109506][  T810]
| [  164.109506][  T810] stack backtrace:
[  164.110001][  T810] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[  164.110413][  T810] Call Trace:
[  164.110570][  T810]  <TASK>
[ 164.110666][ T810] dump_stack_lvl (lib/dump_stack.c:122) 
[ 164.110882][ T810] lockdep_rcu_suspicious (./include/linux/context_tracking.h:153 kernel/locking/lockdep.c:6725) 
[ 164.111073][ T810] 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
[ 164.111347][ T810] br_info_notify (./include/linux/skbuff.h:1320 ./include/net/netlink.h:1015 net/bridge/br_netlink.c:645) bridge
[ 164.111566][ T810] ? lockdep_hardirqs_on_prepare (kernel/locking/lockdep.c:4299 kernel/locking/lockdep.c:4358) 
[ 164.111820][ T810] br_add_if (net/bridge/br_if.c:692) bridge
[ 164.112044][ T810] ? rtnl_is_locked (net/core/rtnetlink.c:164) 
[ 164.112254][ T810] ? netdev_master_upper_dev_get (net/core/dev.c:7102) 
[ 164.112521][ T810] do_setlink (net/core/rtnetlink.c:2907) 
[ 164.112705][ T810] ? is_bpf_text_address (./include/linux/rcupdate.h:336 ./include/linux/rcupdate.h:869 ./kernel/bpf/core.c:769) 
[ 164.112903][ T810] ? __pfx_do_setlink (net/core/rtnetlink.c:2778) 
[ 164.113102][ T810] ? is_bpf_text_address (./kernel/bpf/core.c:772) 
[ 164.113286][ T810] ? kernel_text_address (kernel/extable.c:97 kernel/extable.c:94) 
[ 164.113503][ T810] ? __kernel_text_address (kernel/extable.c:79) 
[ 164.113687][ T810] ? unwind_get_return_address (arch/x86/kernel/unwind_orc.c:369 arch/x86/kernel/unwind_orc.c:364) 
[ 164.113868][ T810] ? __pfx_stack_trace_consume_entry (kernel/stacktrace.c:83) 
[ 164.114091][ T810] ? arch_stack_walk (arch/x86/kernel/stacktrace.c:26) 
[ 164.114287][ T810] ? stack_trace_save (kernel/stacktrace.c:123) 
[ 164.114488][ T810] ? __pfx_stack_trace_save (kernel/stacktrace.c:114) 
[ 164.114668][ T810] ? __pfx_validate_nla (lib/nlattr.c:396) 
[ 164.114888][ T810] ? mark_lock (kernel/locking/lockdep.c:4655 (discriminator 3)) 
[ 164.115031][ T810] ? kasan_save_stack (mm/kasan/common.c:49) 
[ 164.115236][ T810] ? __nla_validate_parse (lib/nlattr.c:638) 
[ 164.115425][ T810] __rtnl_newlink (net/core/rtnetlink.c:3696) 
[ 164.115619][ T810] ? 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) 
[ 164.115824][ T810] ? __pfx___rtnl_newlink (net/core/rtnetlink.c:3557) 
[ 164.116012][ T810] ? lockdep_hardirqs_on_prepare (kernel/locking/lockdep.c:4299 kernel/locking/lockdep.c:4358) 
[ 164.116238][ T810] ? __create_object (mm/kmemleak.c:751) 
[ 164.116423][ T810] ? trace_kmalloc (./include/trace/events/kmem.h:54 (discriminator 52)) 
[ 164.116611][ T810] rtnl_newlink (net/core/rtnetlink.c:3744) 
[ 164.116757][ T810] rtnetlink_rcv_msg (net/core/rtnetlink.c:6647) 
[ 164.116941][ T810] ? __pfx_rtnetlink_rcv_msg (net/core/rtnetlink.c:6541) 
[ 164.117137][ T810] ? 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) 
[ 164.117318][ T810] ? mark_lock (kernel/locking/lockdep.c:4655 (discriminator 3)) 
[ 164.117461][ T810] ? __lock_acquire (kernel/locking/lockdep.c:5142) 
[ 164.117643][ T810] netlink_rcv_skb (net/netlink/af_netlink.c:2550) 
[ 164.117821][ T810] ? __pfx_rtnetlink_rcv_msg (net/core/rtnetlink.c:6541) 
[ 164.118002][ T810] ? __pfx_netlink_rcv_skb (net/netlink/af_netlink.c:2527) 
[ 164.118201][ T810] ? netlink_deliver_tap (./include/linux/rcupdate.h:336 ./include/linux/rcupdate.h:869 net/netlink/af_netlink.c:340) 
[ 164.118385][ T810] ? 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) 
[ 164.118572][ T810] netlink_unicast (net/netlink/af_netlink.c:1331 net/netlink/af_netlink.c:1357) 
[ 164.118757][ T810] ? __pfx_netlink_unicast (net/netlink/af_netlink.c:1342) 
[ 164.118944][ T810] netlink_sendmsg (net/netlink/af_netlink.c:1901) 
[ 164.119132][ T810] ? __pfx_netlink_sendmsg (net/netlink/af_netlink.c:1820) 
[ 164.119314][ T810] ? __import_iovec (lib/iov_iter.c:1263 lib/iov_iter.c:1279) 
[ 164.119503][ T810] ____sys_sendmsg (net/socket.c:730 net/socket.c:745 net/socket.c:2597) 
[ 164.119694][ T810] ? __pfx_____sys_sendmsg (net/socket.c:2543) 
[ 164.119879][ T810] ? __pfx_copy_msghdr_from_user (net/socket.c:2523) 
[ 164.120101][ T810] ? __pfx_validate_chain (kernel/locking/lockdep.c:3824) 
[ 164.120291][ T810] ___sys_sendmsg (net/socket.c:2653) 
[ 164.120475][ T810] ? __pfx____sys_sendmsg (net/socket.c:2640) 
[ 164.120657][ T810] ? find_held_lock (kernel/locking/lockdep.c:5249) 
[ 164.120839][ T810] ? __lock_release (kernel/locking/lockdep.c:5435) 
[ 164.121016][ T810] ? __debug_check_no_obj_freed (lib/debugobjects.c:1001) 
[ 164.121246][ T810] ? __pfx___lock_release (kernel/locking/lockdep.c:5411) 
[ 164.121458][ T810] ? __pfx_do_raw_spin_lock (kernel/locking/spinlock_debug.c:114) 
[ 164.121667][ T810] ? lockdep_hardirqs_on_prepare (kernel/locking/lockdep.c:4299 kernel/locking/lockdep.c:4358) 
[ 164.121939][ T810] ? __fget_light (./include/linux/atomic/atomic-arch-fallback.h:479 ./include/linux/atomic/atomic-instrumented.h:50 fs/file.c:1145) 
[ 164.122143][ T810] __sys_sendmsg (./include/linux/file.h:34 net/socket.c:2682) 
[ 164.122330][ T810] ? __pfx___sys_sendmsg (net/socket.c:2668) 
[ 164.122525][ T810] ? __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) 
[ 164.122725][ T810] do_syscall_64 (arch/x86/entry/common.c:52 arch/x86/entry/common.c:83) 
[ 164.122944][ T810] entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:130) 
[  164.123171][  T810] RIP: 0033:0x7f933d1b07b7
[ 164.123357][ T810] 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)
[  164.123981][  T810] RSP: 002b:00007ffc975f8f98 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
[  164.124260][  T810] RAX: ffffffffffffffda RBX: 00007ffc975f96d0 RCX: 00007f933d1b07b7
[  164.124529][  T810] RDX: 0000000000000000 RSI: 00007ffc975f9000 RDI: 0000000000000005
[  164.124797][  T810] RBP: 0000000000000003 R08: 0000000000000003 R09: 0000000000000000
[  164.125068][  T810] R10: 000000003848e910 R11: 0000000000000246 R12: 0000000000000003


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