======================================
| [   34.839876][  T275] 1 lock held by ip/275:
| [ 34.840274][ T275] #0: ffffffff8ebc5cc8 (rtnl_mutex){+.+.}-{3:3}, at: rtnetlink_rcv_msg (net/core/rtnetlink.c:6645) 
| [   34.840603][  T275]
| [   34.840603][  T275] stack backtrace:
[   34.841081][  T275] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[   34.841463][  T275] Call Trace:
[   34.841601][  T275]  <TASK>
[ 34.841690][ T275] dump_stack_lvl (lib/dump_stack.c:122) 
[ 34.841877][ T275] lockdep_rcu_suspicious (./include/linux/context_tracking.h:153 kernel/locking/lockdep.c:6725) 
[ 34.842055][ T275] ? __pfx_br_handle_frame (net/bridge/br_input.c:326) bridge
[ 34.842322][ T275] 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
[ 34.842558][ T275] br_info_notify (./include/linux/skbuff.h:1320 ./include/net/netlink.h:1015 net/bridge/br_netlink.c:645) bridge
[ 34.842757][ T275] ? lockdep_hardirqs_on_prepare (kernel/locking/lockdep.c:4299 kernel/locking/lockdep.c:4358) 
[ 34.842969][ T275] br_add_if (net/bridge/br_if.c:692) bridge
[ 34.843170][ T275] ? rtnl_is_locked (net/core/rtnetlink.c:164) 
[ 34.843365][ T275] ? netdev_master_upper_dev_get (net/core/dev.c:7102) 
[ 34.843587][ T275] do_setlink (net/core/rtnetlink.c:2907) 
[ 34.843757][ T275] ? is_bpf_text_address (./include/linux/rcupdate.h:336 ./include/linux/rcupdate.h:869 ./kernel/bpf/core.c:769) 
[ 34.843927][ T275] ? __pfx_do_setlink (net/core/rtnetlink.c:2778) 
[ 34.844101][ T275] ? is_bpf_text_address (./kernel/bpf/core.c:772) 
[ 34.844287][ T275] ? kernel_text_address (kernel/extable.c:97 kernel/extable.c:94) 
[ 34.844459][ T275] ? __kernel_text_address (kernel/extable.c:79) 
[ 34.844633][ T275] ? unwind_get_return_address (arch/x86/kernel/unwind_orc.c:369 arch/x86/kernel/unwind_orc.c:364) 
[ 34.844801][ T275] ? __pfx_stack_trace_consume_entry (kernel/stacktrace.c:83) 
[ 34.845024][ T275] ? arch_stack_walk (arch/x86/kernel/stacktrace.c:26) 
[ 34.845210][ T275] ? stack_trace_save (kernel/stacktrace.c:123) 
[ 34.845403][ T275] ? __pfx_stack_trace_save (kernel/stacktrace.c:114) 
[ 34.845573][ T275] ? __pfx_validate_nla (lib/nlattr.c:396) 
[ 34.845753][ T275] ? mark_lock (kernel/locking/lockdep.c:4655 (discriminator 3)) 
[ 34.845889][ T275] ? kasan_save_stack (mm/kasan/common.c:49) 
[ 34.846067][ T275] ? __nla_validate_parse (lib/nlattr.c:638) 
[ 34.846257][ T275] __rtnl_newlink (net/core/rtnetlink.c:3696) 
[ 34.846444][ T275] ? 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) 
[ 34.846617][ T275] ? __pfx___rtnl_newlink (net/core/rtnetlink.c:3557) 
[ 34.846787][ T275] ? lockdep_hardirqs_on_prepare (kernel/locking/lockdep.c:4299 kernel/locking/lockdep.c:4358) 
[ 34.846995][ T275] ? __create_object (mm/kmemleak.c:751) 
[ 34.847169][ T275] ? trace_kmalloc (./include/trace/events/kmem.h:54 (discriminator 52)) 
[ 34.847355][ T275] rtnl_newlink (net/core/rtnetlink.c:3744) 
[ 34.847483][ T275] rtnetlink_rcv_msg (net/core/rtnetlink.c:6647) 
[ 34.847669][ T275] ? __pfx_rtnetlink_rcv_msg (net/core/rtnetlink.c:6541) 
[ 34.847837][ T275] ? 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) 
[ 34.848006][ T275] ? mark_lock (kernel/locking/lockdep.c:4655 (discriminator 3)) 
[ 34.848141][ T275] ? __lock_acquire (kernel/locking/lockdep.c:5142) 
[ 34.848325][ T275] netlink_rcv_skb (net/netlink/af_netlink.c:2550) 
[ 34.848491][ T275] ? __pfx_rtnetlink_rcv_msg (net/core/rtnetlink.c:6541) 
[ 34.848664][ T275] ? __pfx_netlink_rcv_skb (net/netlink/af_netlink.c:2527) 
[ 34.848845][ T275] ? netlink_deliver_tap (./include/linux/rcupdate.h:336 ./include/linux/rcupdate.h:869 net/netlink/af_netlink.c:340) 
[ 34.849026][ T275] ? 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) 
[ 34.849200][ T275] netlink_unicast (net/netlink/af_netlink.c:1331 net/netlink/af_netlink.c:1357) 
[ 34.849386][ T275] ? __pfx_netlink_unicast (net/netlink/af_netlink.c:1342) 
[ 34.849564][ T275] netlink_sendmsg (net/netlink/af_netlink.c:1901) 
[ 34.849736][ T275] ? __pfx_netlink_sendmsg (net/netlink/af_netlink.c:1820) 
[ 34.849903][ T275] ? __import_iovec (lib/iov_iter.c:1263 lib/iov_iter.c:1279) 
[ 34.850083][ T275] ____sys_sendmsg (net/socket.c:730 net/socket.c:745 net/socket.c:2597) 
[ 34.850265][ T275] ? __pfx_____sys_sendmsg (net/socket.c:2543) 
[ 34.850437][ T275] ? __pfx_copy_msghdr_from_user (net/socket.c:2523) 
[ 34.850643][ T275] ? __pfx_validate_chain (kernel/locking/lockdep.c:3824) 
[ 34.850823][ T275] ___sys_sendmsg (net/socket.c:2653) 
[ 34.850995][ T275] ? __pfx____sys_sendmsg (net/socket.c:2640) 
[ 34.851161][ T275] ? find_held_lock (kernel/locking/lockdep.c:5249) 
[ 34.851341][ T275] ? __lock_release (kernel/locking/lockdep.c:5435) 
[ 34.851511][ T275] ? __debug_check_no_obj_freed (lib/debugobjects.c:1001) 
[ 34.851722][ T275] ? __pfx___lock_release (kernel/locking/lockdep.c:5411) 
[ 34.851905][ T275] ? __pfx_do_raw_spin_lock (kernel/locking/spinlock_debug.c:114) 
[ 34.852092][ T275] ? lockdep_hardirqs_on_prepare (kernel/locking/lockdep.c:4299 kernel/locking/lockdep.c:4358) 
[ 34.852307][ T275] ? __fget_light (./include/linux/atomic/atomic-arch-fallback.h:479 ./include/linux/atomic/atomic-instrumented.h:50 fs/file.c:1145) 
[ 34.852480][ T275] __sys_sendmsg (./include/linux/file.h:34 net/socket.c:2682) 
[ 34.852644][ T275] ? __pfx___sys_sendmsg (net/socket.c:2668) 
[ 34.852806][ T275] ? __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) 
[ 34.852990][ T275] do_syscall_64 (arch/x86/entry/common.c:52 arch/x86/entry/common.c:83) 
[ 34.853167][ T275] entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:130) 
[   34.853396][  T275] RIP: 0033:0x7f5f83c437b7
[ 34.853569][ T275] 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)
[   34.854311][  T275] RSP: 002b:00007ffd0b6b8d58 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
[   34.854566][  T275] RAX: ffffffffffffffda RBX: 00007ffd0b6b9480 RCX: 00007f5f83c437b7
[   34.854923][  T275] RDX: 0000000000000000 RSI: 00007ffd0b6b8dc0 RDI: 0000000000000005
[   34.855167][  T275] RBP: 0000000000000003 R08: 0000000000000003 R09: 0000000000000000
[   34.855420][  T275] R10: 000000003d539910 R11: 0000000000000246 R12: 0000000000000003
[   34.855771][  T275] R13: 0000000066bea6d6 R14: 0000000000496600 R15: 0000000000000000
| [   34.858011][  T275] 1 lock held by ip/275:
| [ 34.858139][ T275] #0: ffffffff8ebc5cc8 (rtnl_mutex){+.+.}-{3:3}, at: rtnetlink_rcv_msg (net/core/rtnetlink.c:6645) 
| [   34.858466][  T275]
| [   34.858466][  T275] stack backtrace:
[   34.859020][  T275] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[   34.859398][  T275] Call Trace:
[   34.859524][  T275]  <TASK>
[ 34.859615][ T275] dump_stack_lvl (lib/dump_stack.c:122) 
[ 34.859883][ T275] lockdep_rcu_suspicious (./include/linux/context_tracking.h:153 kernel/locking/lockdep.c:6725) 
[ 34.860058][ T275] 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
[ 34.860310][ T275] br_info_notify (./include/linux/skbuff.h:1320 ./include/net/netlink.h:1015 net/bridge/br_netlink.c:645) bridge
[ 34.860509][ T275] ? lockdep_hardirqs_on_prepare (kernel/locking/lockdep.c:4299 kernel/locking/lockdep.c:4358) 
[ 34.860825][ T275] br_add_if (net/bridge/br_if.c:692) bridge
[ 34.861018][ T275] ? rtnl_is_locked (net/core/rtnetlink.c:164) 
[ 34.861185][ T275] ? netdev_master_upper_dev_get (net/core/dev.c:7102) 
[ 34.861508][ T275] do_setlink (net/core/rtnetlink.c:2907) 
[ 34.861677][ T275] ? is_bpf_text_address (./include/linux/rcupdate.h:336 ./include/linux/rcupdate.h:869 ./kernel/bpf/core.c:769) 
[ 34.861848][ T275] ? __pfx_do_setlink (net/core/rtnetlink.c:2778) 
[ 34.862024][ T275] ? is_bpf_text_address (./kernel/bpf/core.c:772) 
[ 34.862219][ T275] ? kernel_text_address (kernel/extable.c:97 kernel/extable.c:94) 
[ 34.862576][ T275] ? __kernel_text_address (kernel/extable.c:79) 
[ 34.862743][ T275] ? unwind_get_return_address (arch/x86/kernel/unwind_orc.c:369 arch/x86/kernel/unwind_orc.c:364) 
[ 34.862909][ T275] ? __pfx_stack_trace_consume_entry (kernel/stacktrace.c:83) 
[ 34.863117][ T275] ? arch_stack_walk (arch/x86/kernel/stacktrace.c:26) 
[ 34.863311][ T275] ? stack_trace_save (kernel/stacktrace.c:123) 
[ 34.863491][ T275] ? __pfx_stack_trace_save (kernel/stacktrace.c:114) 
[ 34.863664][ T275] ? __pfx_validate_nla (lib/nlattr.c:396) 
[ 34.863834][ T275] ? mark_lock (kernel/locking/lockdep.c:4655 (discriminator 3)) 
[ 34.863974][ T275] ? kasan_save_stack (mm/kasan/common.c:49) 
[ 34.864144][ T275] ? __nla_validate_parse (lib/nlattr.c:638) 
[ 34.864332][ T275] __rtnl_newlink (net/core/rtnetlink.c:3696) 
[ 34.864508][ T275] ? 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) 
[ 34.864775][ T275] ? __pfx___rtnl_newlink (net/core/rtnetlink.c:3557) 
[ 34.864947][ T275] ? lockdep_hardirqs_on_prepare (kernel/locking/lockdep.c:4299 kernel/locking/lockdep.c:4358) 
[ 34.865154][ T275] ? __create_object (mm/kmemleak.c:751) 
[ 34.865352][ T275] ? trace_kmalloc (./include/trace/events/kmem.h:54 (discriminator 52)) 
[ 34.865717][ T275] rtnl_newlink (net/core/rtnetlink.c:3744) 
[ 34.865844][ T275] rtnetlink_rcv_msg (net/core/rtnetlink.c:6647) 
[ 34.866016][ T275] ? __pfx_rtnetlink_rcv_msg (net/core/rtnetlink.c:6541) 
[ 34.866180][ T275] ? 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) 
[ 34.866359][ T275] ? mark_lock (kernel/locking/lockdep.c:4655 (discriminator 3)) 
[ 34.866586][ T275] ? __lock_acquire (kernel/locking/lockdep.c:5142) 
[ 34.866755][ T275] netlink_rcv_skb (net/netlink/af_netlink.c:2550) 
[ 34.866924][ T275] ? __pfx_rtnetlink_rcv_msg (net/core/rtnetlink.c:6541) 
[ 34.867104][ T275] ? __pfx_netlink_rcv_skb (net/netlink/af_netlink.c:2527) 
[ 34.867441][ T275] ? netlink_deliver_tap (./include/linux/rcupdate.h:336 ./include/linux/rcupdate.h:869 net/netlink/af_netlink.c:340) 
[ 34.867617][ T275] ? 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) 
[ 34.867786][ T275] netlink_unicast (net/netlink/af_netlink.c:1331 net/netlink/af_netlink.c:1357) 
[ 34.867953][ T275] ? __pfx_netlink_unicast (net/netlink/af_netlink.c:1342) 
[ 34.868125][ T275] netlink_sendmsg (net/netlink/af_netlink.c:1901) 
[ 34.868304][ T275] ? __pfx_netlink_sendmsg (net/netlink/af_netlink.c:1820) 
[ 34.868486][ T275] ? __import_iovec (lib/iov_iter.c:1263 lib/iov_iter.c:1279) 
[ 34.868658][ T275] ____sys_sendmsg (net/socket.c:730 net/socket.c:745 net/socket.c:2597) 
[ 34.868827][ T275] ? __pfx_____sys_sendmsg (net/socket.c:2543) 
[ 34.868991][ T275] ? __pfx_copy_msghdr_from_user (net/socket.c:2523) 
[ 34.869194][ T275] ? __pfx_validate_chain (kernel/locking/lockdep.c:3824) 
[ 34.869388][ T275] ___sys_sendmsg (net/socket.c:2653) 
[ 34.869560][ T275] ? __pfx____sys_sendmsg (net/socket.c:2640) 
[ 34.869822][ T275] ? find_held_lock (kernel/locking/lockdep.c:5249) 
[ 34.869998][ T275] ? __lock_release (kernel/locking/lockdep.c:5435) 
[ 34.870161][ T275] ? __debug_check_no_obj_freed (lib/debugobjects.c:1001) 
[ 34.870377][ T275] ? __pfx___lock_release (kernel/locking/lockdep.c:5411) 
[ 34.870643][ T275] ? __pfx_do_raw_spin_lock (kernel/locking/spinlock_debug.c:114) 
[ 34.870815][ T275] ? lockdep_hardirqs_on_prepare (kernel/locking/lockdep.c:4299 kernel/locking/lockdep.c:4358) 
[ 34.871026][ T275] ? __fget_light (./include/linux/atomic/atomic-arch-fallback.h:479 ./include/linux/atomic/atomic-instrumented.h:50 fs/file.c:1145) 
[ 34.871205][ T275] __sys_sendmsg (./include/linux/file.h:34 net/socket.c:2682) 
[ 34.871483][ T275] ? __pfx___sys_sendmsg (net/socket.c:2668) 
[ 34.871658][ T275] ? __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) 
[ 34.871844][ T275] do_syscall_64 (arch/x86/entry/common.c:52 arch/x86/entry/common.c:83) 
[ 34.872014][ T275] entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:130) 
[   34.872387][  T275] RIP: 0033:0x7f5f83c437b7
[ 34.872563][ T275] 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)
[   34.873134][  T275] RSP: 002b:00007ffd0b6b8d58 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
[   34.873410][  T275] RAX: ffffffffffffffda RBX: 00007ffd0b6b9480 RCX: 00007f5f83c437b7
[   34.873659][  T275] RDX: 0000000000000000 RSI: 00007ffd0b6b8dc0 RDI: 0000000000000005
[   34.873904][  T275] RBP: 0000000000000003 R08: 0000000000000003 R09: 0000000000000000
[   34.874154][  T275] R10: 000000003d539910 R11: 0000000000000246 R12: 0000000000000003


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