======================================
| [   33.630380][  T268] 1 lock held by ip/268:
| [ 33.630526][ T268] #0: ffffffff873c5cc8 (rtnl_mutex){+.+.}-{3:3}, at: rtnetlink_rcv_msg (net/core/rtnetlink.c:6645) 
| [   33.630854][  T268]
| [   33.630854][  T268] stack backtrace:
[   33.631348][  T268] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[   33.631739][  T268] Call Trace:
[   33.631879][  T268]  <TASK>
[ 33.631973][ T268] dump_stack_lvl (lib/dump_stack.c:122) 
[ 33.632156][ T268] lockdep_rcu_suspicious (./include/linux/context_tracking.h:153 kernel/locking/lockdep.c:6725) 
[ 33.632334][ T268] ? __pfx_br_handle_frame (net/bridge/br_input.c:326) bridge
[ 33.632629][ T268] 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
[ 33.633065][ T268] br_info_notify (./include/linux/skbuff.h:1320 ./include/net/netlink.h:1015 net/bridge/br_netlink.c:645) bridge
[ 33.633268][ T268] ? lockdep_hardirqs_on_prepare (kernel/locking/lockdep.c:4299 kernel/locking/lockdep.c:4358) 
[ 33.633489][ T268] br_add_if (net/bridge/br_if.c:692) bridge
[ 33.633698][ T268] ? rtnl_is_locked (net/core/rtnetlink.c:164) 
[ 33.633872][ T268] ? netdev_master_upper_dev_get (net/core/dev.c:7102) 
[ 33.634098][ T268] do_setlink (net/core/rtnetlink.c:2907) 
[ 33.634277][ T268] ? is_bpf_text_address (./include/linux/rcupdate.h:336 ./include/linux/rcupdate.h:869 ./kernel/bpf/core.c:769) 
[ 33.634455][ T268] ? __pfx_do_setlink (net/core/rtnetlink.c:2778) 
[ 33.634636][ T268] ? is_bpf_text_address (./kernel/bpf/core.c:772) 
[ 33.634811][ T268] ? kernel_text_address (kernel/extable.c:97 kernel/extable.c:94) 
[ 33.634991][ T268] ? __kernel_text_address (kernel/extable.c:79) 
[ 33.635168][ T268] ? unwind_get_return_address (arch/x86/kernel/unwind_orc.c:369 arch/x86/kernel/unwind_orc.c:364) 
[ 33.635344][ T268] ? __pfx_stack_trace_consume_entry (kernel/stacktrace.c:83) 
[ 33.635571][ T268] ? arch_stack_walk (arch/x86/kernel/stacktrace.c:26) 
[ 33.635756][ T268] ? stack_trace_save (kernel/stacktrace.c:123) 
[ 33.635936][ T268] ? __pfx_stack_trace_save (kernel/stacktrace.c:114) 
[ 33.636116][ T268] ? __pfx_validate_nla (lib/nlattr.c:396) 
[ 33.636293][ T268] ? mark_lock (kernel/locking/lockdep.c:4655 (discriminator 3)) 
[ 33.636428][ T268] ? kasan_save_stack (mm/kasan/common.c:49) 
[ 33.636606][ T268] ? __nla_validate_parse (lib/nlattr.c:638) 
[ 33.636788][ T268] __rtnl_newlink (net/core/rtnetlink.c:3696) 
[ 33.636969][ T268] ? 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) 
[ 33.637144][ T268] ? __pfx___rtnl_newlink (net/core/rtnetlink.c:3557) 
[ 33.637324][ T268] ? lockdep_hardirqs_on_prepare (kernel/locking/lockdep.c:4299 kernel/locking/lockdep.c:4358) 
[ 33.637546][ T268] ? __create_object (mm/kmemleak.c:751) 
[ 33.637723][ T268] ? trace_kmalloc (./include/trace/events/kmem.h:54 (discriminator 52)) 
[ 33.637903][ T268] rtnl_newlink (net/core/rtnetlink.c:3744) 
[ 33.638036][ T268] rtnetlink_rcv_msg (net/core/rtnetlink.c:6647) 
[ 33.638215][ T268] ? __pfx_rtnetlink_rcv_msg (net/core/rtnetlink.c:6541) 
[ 33.638393][ T268] ? 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) 
[ 33.638568][ T268] ? mark_lock (kernel/locking/lockdep.c:4655 (discriminator 3)) 
[ 33.638706][ T268] ? __lock_acquire (kernel/locking/lockdep.c:5142) 
[ 33.638888][ T268] netlink_rcv_skb (net/netlink/af_netlink.c:2550) 
[ 33.639064][ T268] ? __pfx_rtnetlink_rcv_msg (net/core/rtnetlink.c:6541) 
[ 33.639242][ T268] ? __pfx_netlink_rcv_skb (net/netlink/af_netlink.c:2527) 
[ 33.639432][ T268] ? netlink_deliver_tap (./include/linux/rcupdate.h:336 ./include/linux/rcupdate.h:869 net/netlink/af_netlink.c:340) 
[ 33.639612][ T268] ? 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) 
[ 33.639794][ T268] netlink_unicast (net/netlink/af_netlink.c:1331 net/netlink/af_netlink.c:1357) 
[ 33.639974][ T268] ? __pfx_netlink_unicast (net/netlink/af_netlink.c:1342) 
[ 33.640156][ T268] netlink_sendmsg (net/netlink/af_netlink.c:1901) 
[ 33.640342][ T268] ? __pfx_netlink_sendmsg (net/netlink/af_netlink.c:1820) 
[ 33.640520][ T268] ? __import_iovec (lib/iov_iter.c:1263 lib/iov_iter.c:1279) 
[ 33.640704][ T268] ____sys_sendmsg (net/socket.c:730 net/socket.c:745 net/socket.c:2597) 
[ 33.640883][ T268] ? __pfx_____sys_sendmsg (net/socket.c:2543) 
[ 33.641057][ T268] ? __pfx_copy_msghdr_from_user (net/socket.c:2523) 
[ 33.641274][ T268] ? __pfx_validate_chain (kernel/locking/lockdep.c:3824) 
[ 33.641477][ T268] ___sys_sendmsg (net/socket.c:2653) 
[ 33.641654][ T268] ? __pfx____sys_sendmsg (net/socket.c:2640) 
[ 33.641836][ T268] ? find_held_lock (kernel/locking/lockdep.c:5249) 
[ 33.642013][ T268] ? __lock_release (kernel/locking/lockdep.c:5435) 
[ 33.642187][ T268] ? __debug_check_no_obj_freed (lib/debugobjects.c:1001) 
[ 33.642405][ T268] ? __pfx___lock_release (kernel/locking/lockdep.c:5411) 
[ 33.642584][ T268] ? __pfx_do_raw_spin_lock (kernel/locking/spinlock_debug.c:114) 
[ 33.642765][ T268] ? lockdep_hardirqs_on_prepare (kernel/locking/lockdep.c:4299 kernel/locking/lockdep.c:4358) 
[ 33.642985][ T268] ? __fget_light (./include/linux/atomic/atomic-arch-fallback.h:479 ./include/linux/atomic/atomic-instrumented.h:50 fs/file.c:1145) 
[ 33.643166][ T268] __sys_sendmsg (./include/linux/file.h:34 net/socket.c:2682) 
[ 33.643344][ T268] ? __pfx___sys_sendmsg (net/socket.c:2668) 
[ 33.643517][ T268] ? __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) 
[ 33.643718][ T268] do_syscall_64 (arch/x86/entry/common.c:52 arch/x86/entry/common.c:83) 
[ 33.643918][ T268] entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:130) 
[   33.644135][  T268] RIP: 0033:0x7f7a7718b7b7
[ 33.644324][ T268] 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)
[   33.644941][  T268] RSP: 002b:00007ffe63155358 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
[   33.645212][  T268] RAX: ffffffffffffffda RBX: 00007ffe63155a90 RCX: 00007f7a7718b7b7
[   33.645474][  T268] RDX: 0000000000000000 RSI: 00007ffe631553c0 RDI: 0000000000000005
[   33.645740][  T268] RBP: 0000000000000003 R08: 0000000000000003 R09: 0000000000000000
[   33.646006][  T268] R10: 000000003f9d2910 R11: 0000000000000246 R12: 0000000000000003
[   33.646269][  T268] R13: 0000000066bea73e R14: 0000000000496600 R15: 0000000000000000
| [   33.648399][  T268] 1 lock held by ip/268:
| [ 33.648543][ T268] #0: ffffffff873c5cc8 (rtnl_mutex){+.+.}-{3:3}, at: rtnetlink_rcv_msg (net/core/rtnetlink.c:6645) 
| [   33.648867][  T268]
| [   33.648867][  T268] stack backtrace:
[   33.649348][  T268] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[   33.649740][  T268] Call Trace:
[   33.649875][  T268]  <TASK>
[ 33.649968][ T268] dump_stack_lvl (lib/dump_stack.c:122) 
[ 33.650154][ T268] lockdep_rcu_suspicious (./include/linux/context_tracking.h:153 kernel/locking/lockdep.c:6725) 
[ 33.650333][ T268] 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
[ 33.650587][ T268] br_info_notify (./include/linux/skbuff.h:1320 ./include/net/netlink.h:1015 net/bridge/br_netlink.c:645) bridge
[ 33.650789][ T268] ? lockdep_hardirqs_on_prepare (kernel/locking/lockdep.c:4299 kernel/locking/lockdep.c:4358) 
[ 33.651013][ T268] br_add_if (net/bridge/br_if.c:692) bridge
[ 33.651219][ T268] ? rtnl_is_locked (net/core/rtnetlink.c:164) 
[ 33.651421][ T268] ? netdev_master_upper_dev_get (net/core/dev.c:7102) 
[ 33.651647][ T268] do_setlink (net/core/rtnetlink.c:2907) 
[ 33.651824][ T268] ? is_bpf_text_address (./include/linux/rcupdate.h:336 ./include/linux/rcupdate.h:869 ./kernel/bpf/core.c:769) 
[ 33.652002][ T268] ? __pfx_do_setlink (net/core/rtnetlink.c:2778) 
[ 33.652181][ T268] ? is_bpf_text_address (./kernel/bpf/core.c:772) 
[ 33.652357][ T268] ? kernel_text_address (kernel/extable.c:97 kernel/extable.c:94) 
[ 33.652536][ T268] ? __kernel_text_address (kernel/extable.c:79) 
[ 33.652711][ T268] ? unwind_get_return_address (arch/x86/kernel/unwind_orc.c:369 arch/x86/kernel/unwind_orc.c:364) 
[ 33.652892][ T268] ? __pfx_stack_trace_consume_entry (kernel/stacktrace.c:83) 
[ 33.653111][ T268] ? arch_stack_walk (arch/x86/kernel/stacktrace.c:26) 
[ 33.653300][ T268] ? stack_trace_save (kernel/stacktrace.c:123) 
[ 33.653477][ T268] ? __pfx_stack_trace_save (kernel/stacktrace.c:114) 
[ 33.653658][ T268] ? __pfx_validate_nla (lib/nlattr.c:396) 
[ 33.653833][ T268] ? mark_lock (kernel/locking/lockdep.c:4655 (discriminator 3)) 
[ 33.653971][ T268] ? kasan_save_stack (mm/kasan/common.c:49) 
[ 33.654151][ T268] ? __nla_validate_parse (lib/nlattr.c:638) 
[ 33.654349][ T268] __rtnl_newlink (net/core/rtnetlink.c:3696) 
[ 33.654537][ T268] ? 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) 
[ 33.654716][ T268] ? __pfx___rtnl_newlink (net/core/rtnetlink.c:3557) 
[ 33.654897][ T268] ? lockdep_hardirqs_on_prepare (kernel/locking/lockdep.c:4299 kernel/locking/lockdep.c:4358) 
[ 33.655116][ T268] ? __create_object (mm/kmemleak.c:751) 
[ 33.655296][ T268] ? trace_kmalloc (./include/trace/events/kmem.h:54 (discriminator 52)) 
[ 33.655478][ T268] rtnl_newlink (net/core/rtnetlink.c:3744) 
[ 33.655612][ T268] rtnetlink_rcv_msg (net/core/rtnetlink.c:6647) 
[ 33.655790][ T268] ? __pfx_rtnetlink_rcv_msg (net/core/rtnetlink.c:6541) 
[ 33.655971][ T268] ? 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) 
[ 33.656144][ T268] ? mark_lock (kernel/locking/lockdep.c:4655 (discriminator 3)) 
[ 33.656282][ T268] ? __lock_acquire (kernel/locking/lockdep.c:5142) 
[ 33.656462][ T268] netlink_rcv_skb (net/netlink/af_netlink.c:2550) 
[ 33.656636][ T268] ? __pfx_rtnetlink_rcv_msg (net/core/rtnetlink.c:6541) 
[ 33.656960][ T268] ? __pfx_netlink_rcv_skb (net/netlink/af_netlink.c:2527) 
[ 33.657151][ T268] ? netlink_deliver_tap (./include/linux/rcupdate.h:336 ./include/linux/rcupdate.h:869 net/netlink/af_netlink.c:340) 
[ 33.657330][ T268] ? 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) 
[ 33.657512][ T268] netlink_unicast (net/netlink/af_netlink.c:1331 net/netlink/af_netlink.c:1357) 
[ 33.657791][ T268] ? __pfx_netlink_unicast (net/netlink/af_netlink.c:1342) 
[ 33.657973][ T268] netlink_sendmsg (net/netlink/af_netlink.c:1901) 
[ 33.658152][ T268] ? __pfx_netlink_sendmsg (net/netlink/af_netlink.c:1820) 
[ 33.658328][ T268] ? __import_iovec (lib/iov_iter.c:1263 lib/iov_iter.c:1279) 
[ 33.658513][ T268] ____sys_sendmsg (net/socket.c:730 net/socket.c:745 net/socket.c:2597) 
[ 33.658787][ T268] ? __pfx_____sys_sendmsg (net/socket.c:2543) 
[ 33.658964][ T268] ? __pfx_copy_msghdr_from_user (net/socket.c:2523) 
[ 33.659186][ T268] ? __pfx_validate_chain (kernel/locking/lockdep.c:3824) 
[ 33.659375][ T268] ___sys_sendmsg (net/socket.c:2653) 
[ 33.659649][ T268] ? __pfx____sys_sendmsg (net/socket.c:2640) 
[ 33.659827][ T268] ? find_held_lock (kernel/locking/lockdep.c:5249) 
[ 33.660005][ T268] ? __lock_release (kernel/locking/lockdep.c:5435) 
[ 33.660180][ T268] ? __debug_check_no_obj_freed (lib/debugobjects.c:1001) 
[ 33.660495][ T268] ? __pfx___lock_release (kernel/locking/lockdep.c:5411) 
[ 33.660673][ T268] ? __pfx_do_raw_spin_lock (kernel/locking/spinlock_debug.c:114) 
[ 33.660860][ T268] ? lockdep_hardirqs_on_prepare (kernel/locking/lockdep.c:4299 kernel/locking/lockdep.c:4358) 
[ 33.661081][ T268] ? __fget_light (./include/linux/atomic/atomic-arch-fallback.h:479 ./include/linux/atomic/atomic-instrumented.h:50 fs/file.c:1145) 
[ 33.661372][ T268] __sys_sendmsg (./include/linux/file.h:34 net/socket.c:2682) 
[ 33.661546][ T268] ? __pfx___sys_sendmsg (net/socket.c:2668) 
[ 33.661721][ T268] ? __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) 
[ 33.661914][ T268] do_syscall_64 (arch/x86/entry/common.c:52 arch/x86/entry/common.c:83) 
[ 33.662185][ T268] entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:130) 
[   33.662403][  T268] RIP: 0033:0x7f7a7718b7b7
[ 33.662587][ T268] 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)
[   33.663285][  T268] RSP: 002b:00007ffe63155358 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
[   33.663555][  T268] RAX: ffffffffffffffda RBX: 00007ffe63155a90 RCX: 00007f7a7718b7b7
[   33.664017][  T268] RDX: 0000000000000000 RSI: 00007ffe631553c0 RDI: 0000000000000005
[   33.664279][  T268] RBP: 0000000000000003 R08: 0000000000000003 R09: 0000000000000000
[   33.664542][  T268] R10: 000000003f9d2910 R11: 0000000000000246 R12: 0000000000000003


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