======================================
| [   27.710739][  T259] 1 lock held by ip/259:
| [ 27.710864][ T259] #0: ffffffffb57d2948 (rtnl_mutex){+.+.}-{3:3}, at: rtnetlink_rcv_msg (net/core/rtnetlink.c:6645) 
| [   27.711186][  T259]
| [   27.711186][  T259] stack backtrace:
[   27.711671][  T259] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[   27.712060][  T259] Call Trace:
[   27.712194][  T259]  <TASK>
[ 27.712309][ T259] dump_stack_lvl (lib/dump_stack.c:122) 
[ 27.712483][ T259] lockdep_rcu_suspicious (./include/linux/context_tracking.h:153 kernel/locking/lockdep.c:6725) 
[ 27.712650][ T259] ? __pfx_br_handle_frame (net/bridge/br_input.c:326) 
[ 27.712836][ T259] br_get_link_af_size_filtered (net/bridge/br_private.h:930 net/bridge/br_private.h:940 net/bridge/br_netlink.c:105) 
[ 27.713049][ T259] br_info_notify (./include/linux/skbuff.h:1320 ./include/net/netlink.h:1015 net/bridge/br_netlink.c:645) 
[ 27.713231][ T259] ? lockdep_hardirqs_on_prepare (kernel/locking/lockdep.c:4299 kernel/locking/lockdep.c:4358) 
[ 27.713444][ T259] br_add_if (net/bridge/br_if.c:692) 
[ 27.713601][ T259] ? rtnl_is_locked (net/core/rtnetlink.c:164) 
[ 27.713772][ T259] ? netdev_master_upper_dev_get (net/core/dev.c:7102) 
[ 27.713983][ T259] do_setlink (net/core/rtnetlink.c:2907) 
[ 27.714183][ T259] ? is_bpf_text_address (./include/linux/rcupdate.h:336 ./include/linux/rcupdate.h:869 ./kernel/bpf/core.c:769) 
[ 27.714356][ T259] ? __pfx_do_setlink (net/core/rtnetlink.c:2778) 
[ 27.714543][ T259] ? is_bpf_text_address (./kernel/bpf/core.c:772) 
[ 27.714708][ T259] ? kernel_text_address (kernel/extable.c:97 kernel/extable.c:94) 
[ 27.714891][ T259] ? __kernel_text_address (kernel/extable.c:79) 
[ 27.715060][ T259] ? unwind_get_return_address (arch/x86/kernel/unwind_orc.c:369 arch/x86/kernel/unwind_orc.c:364) 
[ 27.715248][ T259] ? __pfx_stack_trace_consume_entry (kernel/stacktrace.c:83) 
[ 27.715462][ T259] ? arch_stack_walk (arch/x86/kernel/stacktrace.c:26) 
[ 27.715644][ T259] ? stack_trace_save (kernel/stacktrace.c:123) 
[ 27.715833][ T259] ? __pfx_stack_trace_save (kernel/stacktrace.c:114) 
[ 27.715999][ T259] ? __pfx_validate_nla (lib/nlattr.c:396) 
[ 27.716186][ T259] ? mark_lock (kernel/locking/lockdep.c:4655 (discriminator 3)) 
[ 27.716320][ T259] ? kasan_save_stack (mm/kasan/common.c:49) 
[ 27.716492][ T259] ? __nla_validate_parse (lib/nlattr.c:638) 
[ 27.716676][ T259] __rtnl_newlink (net/core/rtnetlink.c:3696) 
[ 27.716850][ T259] ? 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) 
[ 27.717051][ T259] ? __pfx___rtnl_newlink (net/core/rtnetlink.c:3557) 
[ 27.717222][ T259] ? lockdep_hardirqs_on_prepare (kernel/locking/lockdep.c:4299 kernel/locking/lockdep.c:4358) 
[ 27.717457][ T259] ? __create_object (mm/kmemleak.c:751) 
[ 27.717625][ T259] ? trace_kmalloc (./include/trace/events/kmem.h:54 (discriminator 52)) 
[ 27.717800][ T259] rtnl_newlink (net/core/rtnetlink.c:3744) 
[ 27.717926][ T259] rtnetlink_rcv_msg (net/core/rtnetlink.c:6647) 
[ 27.718096][ T259] ? __pfx_rtnetlink_rcv_msg (net/core/rtnetlink.c:6541) 
[ 27.718281][ T259] ? 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) 
[ 27.718454][ T259] ? mark_lock (kernel/locking/lockdep.c:4655 (discriminator 3)) 
[ 27.718587][ T259] ? __lock_acquire (kernel/locking/lockdep.c:5142) 
[ 27.718767][ T259] netlink_rcv_skb (net/netlink/af_netlink.c:2550) 
[ 27.718932][ T259] ? __pfx_rtnetlink_rcv_msg (net/core/rtnetlink.c:6541) 
[ 27.719126][ T259] ? __pfx_netlink_rcv_skb (net/netlink/af_netlink.c:2527) 
[ 27.719313][ T259] ? netlink_deliver_tap (./include/linux/rcupdate.h:336 ./include/linux/rcupdate.h:869 net/netlink/af_netlink.c:340) 
[ 27.719497][ T259] ? 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) 
[ 27.719683][ T259] netlink_unicast (net/netlink/af_netlink.c:1331 net/netlink/af_netlink.c:1357) 
[ 27.719855][ T259] ? __pfx_netlink_unicast (net/netlink/af_netlink.c:1342) 
[ 27.720040][ T259] ? find_held_lock (kernel/locking/lockdep.c:5249) 
[ 27.720213][ T259] netlink_sendmsg (net/netlink/af_netlink.c:1901) 
[ 27.720385][ T259] ? __pfx_netlink_sendmsg (net/netlink/af_netlink.c:1820) 
[ 27.720560][ T259] ? __might_fault (mm/memory.c:6388 mm/memory.c:6381) 
[ 27.720738][ T259] ? __import_iovec (lib/iov_iter.c:1263 lib/iov_iter.c:1279) 
[ 27.720929][ T259] ____sys_sendmsg (net/socket.c:730 net/socket.c:745 net/socket.c:2597) 
[ 27.721105][ T259] ? __pfx_____sys_sendmsg (net/socket.c:2543) 
[ 27.721285][ T259] ? __pfx_copy_msghdr_from_user (net/socket.c:2523) 
[ 27.721507][ T259] ? __pfx_validate_chain (kernel/locking/lockdep.c:3824) 
[ 27.721687][ T259] ___sys_sendmsg (net/socket.c:2653) 
[ 27.721874][ T259] ? __pfx____sys_sendmsg (net/socket.c:2640) 
[ 27.722051][ T259] ? find_held_lock (kernel/locking/lockdep.c:5249) 
[ 27.722240][ T259] ? __lock_release (kernel/locking/lockdep.c:5435) 
[ 27.722409][ T259] ? __debug_check_no_obj_freed (lib/debugobjects.c:1001) 
[ 27.722635][ T259] ? __pfx___lock_release (kernel/locking/lockdep.c:5411) 
[ 27.722804][ T259] ? __pfx_do_raw_spin_lock (kernel/locking/spinlock_debug.c:114) 
[ 27.722983][ T259] ? lockdep_hardirqs_on_prepare (kernel/locking/lockdep.c:4299 kernel/locking/lockdep.c:4358) 
[ 27.723198][ T259] ? __fget_light (./include/linux/atomic/atomic-arch-fallback.h:479 ./include/linux/atomic/atomic-instrumented.h:50 fs/file.c:1145) 
[ 27.723376][ T259] __sys_sendmsg (./include/linux/file.h:34 net/socket.c:2682) 
[ 27.723549][ T259] ? __pfx___sys_sendmsg (net/socket.c:2668) 
[ 27.723719][ T259] ? __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) 
[ 27.723934][ T259] do_syscall_64 (arch/x86/entry/common.c:52 arch/x86/entry/common.c:83) 
[ 27.724112][ T259] entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:130) 
[   27.724337][  T259] RIP: 0033:0x7f872538c7b7
[ 27.724517][ T259] 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)
[   27.725102][  T259] RSP: 002b:00007ffedcab82b8 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
[   27.725359][  T259] RAX: ffffffffffffffda RBX: 00007ffedcab89f0 RCX: 00007f872538c7b7
[   27.725607][  T259] RDX: 0000000000000000 RSI: 00007ffedcab8320 RDI: 0000000000000005
[   27.725861][  T259] RBP: 0000000000000003 R08: 0000000000000003 R09: 0000000000000000
[   27.726117][  T259] R10: 0000000005637910 R11: 0000000000000246 R12: 0000000000000003
[   27.726371][  T259] R13: 0000000066bea2be R14: 0000000000496600 R15: 0000000000000000
| [   27.728531][  T259] 1 lock held by ip/259:
| [ 27.728657][ T259] #0: ffffffffb57d2948 (rtnl_mutex){+.+.}-{3:3}, at: rtnetlink_rcv_msg (net/core/rtnetlink.c:6645) 
| [   27.728965][  T259]
| [   27.728965][  T259] stack backtrace:
[   27.729429][  T259] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[   27.729795][  T259] Call Trace:
[   27.729924][  T259]  <TASK>
[ 27.730014][ T259] dump_stack_lvl (lib/dump_stack.c:122) 
[ 27.730187][ T259] lockdep_rcu_suspicious (./include/linux/context_tracking.h:153 kernel/locking/lockdep.c:6725) 
[ 27.730373][ T259] br_get_link_af_size_filtered (net/bridge/br_private.h:453 net/bridge/br_private.h:940 net/bridge/br_netlink.c:105) 
[ 27.730710][ T259] br_info_notify (./include/linux/skbuff.h:1320 ./include/net/netlink.h:1015 net/bridge/br_netlink.c:645) 
[ 27.730889][ T259] ? lockdep_hardirqs_on_prepare (kernel/locking/lockdep.c:4299 kernel/locking/lockdep.c:4358) 
[ 27.731123][ T259] br_add_if (net/bridge/br_if.c:692) 
[ 27.731277][ T259] ? rtnl_is_locked (net/core/rtnetlink.c:164) 
[ 27.731542][ T259] ? netdev_master_upper_dev_get (net/core/dev.c:7102) 
[ 27.731752][ T259] do_setlink (net/core/rtnetlink.c:2907) 
[ 27.731944][ T259] ? is_bpf_text_address (./include/linux/rcupdate.h:336 ./include/linux/rcupdate.h:869 ./kernel/bpf/core.c:769) 
[ 27.732139][ T259] ? __pfx_do_setlink (net/core/rtnetlink.c:2778) 
[ 27.732450][ T259] ? is_bpf_text_address (./kernel/bpf/core.c:772) 
[ 27.732629][ T259] ? kernel_text_address (kernel/extable.c:97 kernel/extable.c:94) 
[ 27.732801][ T259] ? __kernel_text_address (kernel/extable.c:79) 
[ 27.732968][ T259] ? unwind_get_return_address (arch/x86/kernel/unwind_orc.c:369 arch/x86/kernel/unwind_orc.c:364) 
[ 27.733146][ T259] ? __pfx_stack_trace_consume_entry (kernel/stacktrace.c:83) 
[ 27.733351][ T259] ? arch_stack_walk (arch/x86/kernel/stacktrace.c:26) 
[ 27.733546][ T259] ? stack_trace_save (kernel/stacktrace.c:123) 
[ 27.733727][ T259] ? __pfx_stack_trace_save (kernel/stacktrace.c:114) 
[ 27.733995][ T259] ? __pfx_validate_nla (lib/nlattr.c:396) 
[ 27.734189][ T259] ? mark_lock (kernel/locking/lockdep.c:4655 (discriminator 3)) 
[ 27.734323][ T259] ? kasan_save_stack (mm/kasan/common.c:49) 
[ 27.734508][ T259] ? __nla_validate_parse (lib/nlattr.c:638) 
[ 27.734785][ T259] __rtnl_newlink (net/core/rtnetlink.c:3696) 
[ 27.734982][ T259] ? 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) 
[ 27.735159][ T259] ? __pfx___rtnl_newlink (net/core/rtnetlink.c:3557) 
[ 27.735363][ T259] ? lockdep_hardirqs_on_prepare (kernel/locking/lockdep.c:4299 kernel/locking/lockdep.c:4358) 
[ 27.735679][ T259] ? __create_object (mm/kmemleak.c:751) 
[ 27.735850][ T259] ? trace_kmalloc (./include/trace/events/kmem.h:54 (discriminator 52)) 
[ 27.736028][ T259] rtnl_newlink (net/core/rtnetlink.c:3744) 
[ 27.736158][ T259] rtnetlink_rcv_msg (net/core/rtnetlink.c:6647) 
[ 27.736353][ T259] ? __pfx_rtnetlink_rcv_msg (net/core/rtnetlink.c:6541) 
[ 27.736630][ T259] ? 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) 
[ 27.736797][ T259] ? mark_lock (kernel/locking/lockdep.c:4655 (discriminator 3)) 
[ 27.736933][ T259] ? __lock_acquire (kernel/locking/lockdep.c:5142) 
[ 27.737139][ T259] netlink_rcv_skb (net/netlink/af_netlink.c:2550) 
[ 27.737401][ T259] ? __pfx_rtnetlink_rcv_msg (net/core/rtnetlink.c:6541) 
[ 27.737582][ T259] ? __pfx_netlink_rcv_skb (net/netlink/af_netlink.c:2527) 
[ 27.737778][ T259] ? netlink_deliver_tap (./include/linux/rcupdate.h:336 ./include/linux/rcupdate.h:869 net/netlink/af_netlink.c:340) 
[ 27.737963][ T259] ? 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) 
[ 27.738144][ T259] netlink_unicast (net/netlink/af_netlink.c:1331 net/netlink/af_netlink.c:1357) 
[ 27.738438][ T259] ? __pfx_netlink_unicast (net/netlink/af_netlink.c:1342) 
[ 27.738620][ T259] ? find_held_lock (kernel/locking/lockdep.c:5249) 
[ 27.738790][ T259] netlink_sendmsg (net/netlink/af_netlink.c:1901) 
[ 27.738981][ T259] ? __pfx_netlink_sendmsg (net/netlink/af_netlink.c:1820) 
[ 27.739149][ T259] ? __might_fault (mm/memory.c:6388 mm/memory.c:6381) 
[ 27.739348][ T259] ? __import_iovec (lib/iov_iter.c:1263 lib/iov_iter.c:1279) 
[ 27.739522][ T259] ____sys_sendmsg (net/socket.c:730 net/socket.c:745 net/socket.c:2597) 
[ 27.739709][ T259] ? __pfx_____sys_sendmsg (net/socket.c:2543) 
[ 27.739885][ T259] ? __pfx_copy_msghdr_from_user (net/socket.c:2523) 
[ 27.740102][ T259] ? __pfx_validate_chain (kernel/locking/lockdep.c:3824) 
[ 27.740306][ T259] ___sys_sendmsg (net/socket.c:2653) 
[ 27.740480][ T259] ? __pfx____sys_sendmsg (net/socket.c:2640) 
[ 27.740757][ T259] ? find_held_lock (kernel/locking/lockdep.c:5249) 
[ 27.740927][ T259] ? __lock_release (kernel/locking/lockdep.c:5435) 
[ 27.741101][ T259] ? __debug_check_no_obj_freed (lib/debugobjects.c:1001) 
[ 27.741325][ T259] ? __pfx___lock_release (kernel/locking/lockdep.c:5411) 
[ 27.741586][ T259] ? __pfx_do_raw_spin_lock (kernel/locking/spinlock_debug.c:114) 
[ 27.741771][ T259] ? lockdep_hardirqs_on_prepare (kernel/locking/lockdep.c:4299 kernel/locking/lockdep.c:4358) 
[ 27.742003][ T259] ? __fget_light (./include/linux/atomic/atomic-arch-fallback.h:479 ./include/linux/atomic/atomic-instrumented.h:50 fs/file.c:1145) 
[ 27.742175][ T259] __sys_sendmsg (./include/linux/file.h:34 net/socket.c:2682) 
[ 27.742452][ T259] ? __pfx___sys_sendmsg (net/socket.c:2668) 
[ 27.742635][ T259] ? __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) 
[ 27.742821][ T259] do_syscall_64 (arch/x86/entry/common.c:52 arch/x86/entry/common.c:83) 
[ 27.743004][ T259] entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:130) 
[   27.743351][  T259] RIP: 0033:0x7f872538c7b7
[ 27.743553][ T259] 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)
[   27.744165][  T259] RSP: 002b:00007ffedcab82b8 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
[   27.744418][  T259] RAX: ffffffffffffffda RBX: 00007ffedcab89f0 RCX: 00007f872538c7b7
[   27.744671][  T259] RDX: 0000000000000000 RSI: 00007ffedcab8320 RDI: 0000000000000005
[   27.744923][  T259] RBP: 0000000000000003 R08: 0000000000000003 R09: 0000000000000000
[   27.745170][  T259] R10: 0000000005637910 R11: 0000000000000246 R12: 0000000000000003


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