======================================
| [   29.109149][  T266] 1 lock held by ip/266:
| [ 29.109289][ T266] #0: ffffffffb1dd2948 (rtnl_mutex){+.+.}-{3:3}, at: rtnetlink_rcv_msg (net/core/rtnetlink.c:6645) 
| [   29.109632][  T266]
| [   29.109632][  T266] stack backtrace:
[   29.110106][  T266] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[   29.110489][  T266] Call Trace:
[   29.110627][  T266]  <TASK>
[ 29.110720][ T266] dump_stack_lvl (lib/dump_stack.c:122) 
[ 29.110907][ T266] lockdep_rcu_suspicious (./include/linux/context_tracking.h:153 kernel/locking/lockdep.c:6725) 
[ 29.111082][ T266] ? __pfx_br_handle_frame (net/bridge/br_input.c:326) 
[ 29.111268][ T266] br_get_link_af_size_filtered (net/bridge/br_private.h:930 net/bridge/br_private.h:940 net/bridge/br_netlink.c:105) 
[ 29.111482][ T266] br_info_notify (./include/linux/skbuff.h:1320 ./include/net/netlink.h:1015 net/bridge/br_netlink.c:645) 
[ 29.111654][ T266] ? lockdep_hardirqs_on_prepare (kernel/locking/lockdep.c:4299 kernel/locking/lockdep.c:4358) 
[ 29.111870][ T266] br_add_if (net/bridge/br_if.c:692) 
[ 29.112008][ T266] ? rtnl_is_locked (net/core/rtnetlink.c:164) 
[ 29.112191][ T266] ? netdev_master_upper_dev_get (net/core/dev.c:7102) 
[ 29.112411][ T266] do_setlink (net/core/rtnetlink.c:2907) 
[ 29.112583][ T266] ? is_bpf_text_address (./include/linux/rcupdate.h:336 ./include/linux/rcupdate.h:869 ./kernel/bpf/core.c:769) 
[ 29.112766][ T266] ? __pfx_do_setlink (net/core/rtnetlink.c:2778) 
[ 29.112939][ T266] ? is_bpf_text_address (./kernel/bpf/core.c:772) 
[ 29.113107][ T266] ? kernel_text_address (kernel/extable.c:97 kernel/extable.c:94) 
[ 29.113278][ T266] ? __kernel_text_address (kernel/extable.c:79) 
[ 29.113567][ T266] ? unwind_get_return_address (arch/x86/kernel/unwind_orc.c:369 arch/x86/kernel/unwind_orc.c:364) 
[ 29.113735][ T266] ? __pfx_stack_trace_consume_entry (kernel/stacktrace.c:83) 
[ 29.113951][ T266] ? arch_stack_walk (arch/x86/kernel/stacktrace.c:26) 
[ 29.114135][ T266] ? stack_trace_save (kernel/stacktrace.c:123) 
[ 29.114310][ T266] ? __pfx_stack_trace_save (kernel/stacktrace.c:114) 
[ 29.114481][ T266] ? __pfx_validate_nla (lib/nlattr.c:396) 
[ 29.114656][ T266] ? mark_lock (kernel/locking/lockdep.c:4655 (discriminator 3)) 
[ 29.114789][ T266] ? kasan_save_stack (mm/kasan/common.c:49) 
[ 29.114968][ T266] ? __nla_validate_parse (lib/nlattr.c:638) 
[ 29.115145][ T266] __rtnl_newlink (net/core/rtnetlink.c:3696) 
[ 29.115323][ T266] ? 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) 
[ 29.115497][ T266] ? __pfx___rtnl_newlink (net/core/rtnetlink.c:3557) 
[ 29.115678][ T266] ? lockdep_hardirqs_on_prepare (kernel/locking/lockdep.c:4299 kernel/locking/lockdep.c:4358) 
[ 29.115893][ T266] ? __create_object (mm/kmemleak.c:751) 
[ 29.116071][ T266] ? trace_kmalloc (./include/trace/events/kmem.h:54 (discriminator 52)) 
[ 29.116250][ T266] rtnl_newlink (net/core/rtnetlink.c:3744) 
[ 29.116382][ T266] rtnetlink_rcv_msg (net/core/rtnetlink.c:6647) 
[ 29.116556][ T266] ? __pfx_rtnetlink_rcv_msg (net/core/rtnetlink.c:6541) 
[ 29.116728][ T266] ? 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) 
[ 29.116896][ T266] ? mark_lock (kernel/locking/lockdep.c:4655 (discriminator 3)) 
[ 29.117031][ T266] ? __lock_acquire (kernel/locking/lockdep.c:5142) 
[ 29.117209][ T266] netlink_rcv_skb (net/netlink/af_netlink.c:2550) 
[ 29.117382][ T266] ? __pfx_rtnetlink_rcv_msg (net/core/rtnetlink.c:6541) 
[ 29.117556][ T266] ? __pfx_netlink_rcv_skb (net/netlink/af_netlink.c:2527) 
[ 29.117743][ T266] ? netlink_deliver_tap (./include/linux/rcupdate.h:336 ./include/linux/rcupdate.h:869 net/netlink/af_netlink.c:340) 
[ 29.117936][ T266] ? 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) 
[ 29.118094][ T266] netlink_unicast (net/netlink/af_netlink.c:1331 net/netlink/af_netlink.c:1357) 
[ 29.118257][ T266] ? __pfx_netlink_unicast (net/netlink/af_netlink.c:1342) 
[ 29.118433][ T266] ? find_held_lock (kernel/locking/lockdep.c:5249) 
[ 29.118616][ T266] netlink_sendmsg (net/netlink/af_netlink.c:1901) 
[ 29.118792][ T266] ? __pfx_netlink_sendmsg (net/netlink/af_netlink.c:1820) 
[ 29.118960][ T266] ? __might_fault (mm/memory.c:6388 mm/memory.c:6381) 
[ 29.119141][ T266] ? __import_iovec (lib/iov_iter.c:1263 lib/iov_iter.c:1279) 
[ 29.119322][ T266] ____sys_sendmsg (net/socket.c:730 net/socket.c:745 net/socket.c:2597) 
[ 29.119498][ T266] ? __pfx_____sys_sendmsg (net/socket.c:2543) 
[ 29.119681][ T266] ? __pfx_copy_msghdr_from_user (net/socket.c:2523) 
[ 29.119897][ T266] ? __pfx_validate_chain (kernel/locking/lockdep.c:3824) 
[ 29.120087][ T266] ___sys_sendmsg (net/socket.c:2653) 
[ 29.120260][ T266] ? __pfx____sys_sendmsg (net/socket.c:2640) 
[ 29.120433][ T266] ? find_held_lock (kernel/locking/lockdep.c:5249) 
[ 29.120608][ T266] ? __lock_release (kernel/locking/lockdep.c:5435) 
[ 29.120779][ T266] ? __debug_check_no_obj_freed (lib/debugobjects.c:1001) 
[ 29.120991][ T266] ? __pfx___lock_release (kernel/locking/lockdep.c:5411) 
[ 29.121166][ T266] ? __pfx_do_raw_spin_lock (kernel/locking/spinlock_debug.c:114) 
[ 29.121345][ T266] ? lockdep_hardirqs_on_prepare (kernel/locking/lockdep.c:4299 kernel/locking/lockdep.c:4358) 
[ 29.121564][ T266] ? __fget_light (./include/linux/atomic/atomic-arch-fallback.h:479 ./include/linux/atomic/atomic-instrumented.h:50 fs/file.c:1145) 
[ 29.121743][ T266] __sys_sendmsg (./include/linux/file.h:34 net/socket.c:2682) 
[ 29.121918][ T266] ? __pfx___sys_sendmsg (net/socket.c:2668) 
[ 29.122087][ T266] ? __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) 
[ 29.122316][ T266] do_syscall_64 (arch/x86/entry/common.c:52 arch/x86/entry/common.c:83) 
[ 29.122494][ T266] entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:130) 
[   29.122715][  T266] RIP: 0033:0x7fc25bbe67b7
[ 29.122896][ T266] 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)
[   29.123498][  T266] RSP: 002b:00007ffce6cf50f8 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
[   29.123757][  T266] RAX: ffffffffffffffda RBX: 00007ffce6cf5820 RCX: 00007fc25bbe67b7
[   29.124012][  T266] RDX: 0000000000000000 RSI: 00007ffce6cf5160 RDI: 0000000000000005
[   29.124272][  T266] RBP: 0000000000000004 R08: 0000000000000003 R09: 0000000000000000
[   29.124524][  T266] R10: 00000000184a9910 R11: 0000000000000246 R12: 0000000000000004
[   29.124778][  T266] R13: 0000000066be9e9f R14: 0000000000496600 R15: 0000000000000000
| [   29.126881][  T266] 1 lock held by ip/266:
| [ 29.127020][ T266] #0: ffffffffb1dd2948 (rtnl_mutex){+.+.}-{3:3}, at: rtnetlink_rcv_msg (net/core/rtnetlink.c:6645) 
| [   29.127343][  T266]
| [   29.127343][  T266] stack backtrace:
[   29.127831][  T266] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[   29.128227][  T266] Call Trace:
[   29.128359][  T266]  <TASK>
[ 29.128461][ T266] dump_stack_lvl (lib/dump_stack.c:122) 
[ 29.128647][ T266] lockdep_rcu_suspicious (./include/linux/context_tracking.h:153 kernel/locking/lockdep.c:6725) 
[ 29.128832][ T266] br_get_link_af_size_filtered (net/bridge/br_private.h:453 net/bridge/br_private.h:940 net/bridge/br_netlink.c:105) 
[ 29.129057][ T266] br_info_notify (./include/linux/skbuff.h:1320 ./include/net/netlink.h:1015 net/bridge/br_netlink.c:645) 
[ 29.129237][ T266] ? lockdep_hardirqs_on_prepare (kernel/locking/lockdep.c:4299 kernel/locking/lockdep.c:4358) 
[ 29.129465][ T266] br_add_if (net/bridge/br_if.c:692) 
[ 29.129607][ T266] ? rtnl_is_locked (net/core/rtnetlink.c:164) 
[ 29.129788][ T266] ? netdev_master_upper_dev_get (net/core/dev.c:7102) 
[ 29.130014][ T266] do_setlink (net/core/rtnetlink.c:2907) 
[ 29.130195][ T266] ? is_bpf_text_address (./include/linux/rcupdate.h:336 ./include/linux/rcupdate.h:869 ./kernel/bpf/core.c:769) 
[ 29.130375][ T266] ? __pfx_do_setlink (net/core/rtnetlink.c:2778) 
[ 29.130554][ T266] ? is_bpf_text_address (./kernel/bpf/core.c:772) 
[ 29.130724][ T266] ? kernel_text_address (kernel/extable.c:97 kernel/extable.c:94) 
[ 29.130909][ T266] ? __kernel_text_address (kernel/extable.c:79) 
[ 29.131091][ T266] ? unwind_get_return_address (arch/x86/kernel/unwind_orc.c:369 arch/x86/kernel/unwind_orc.c:364) 
[ 29.131269][ T266] ? __pfx_stack_trace_consume_entry (kernel/stacktrace.c:83) 
[ 29.131494][ T266] ? arch_stack_walk (arch/x86/kernel/stacktrace.c:26) 
[ 29.131684][ T266] ? stack_trace_save (kernel/stacktrace.c:123) 
[ 29.131858][ T266] ? __pfx_stack_trace_save (kernel/stacktrace.c:114) 
[ 29.132033][ T266] ? __pfx_validate_nla (lib/nlattr.c:396) 
[ 29.132233][ T266] ? mark_lock (kernel/locking/lockdep.c:4655 (discriminator 3)) 
[ 29.132373][ T266] ? kasan_save_stack (mm/kasan/common.c:49) 
[ 29.132555][ T266] ? __nla_validate_parse (lib/nlattr.c:638) 
[ 29.132741][ T266] __rtnl_newlink (net/core/rtnetlink.c:3696) 
[ 29.132922][ T266] ? 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) 
[ 29.133094][ T266] ? __pfx___rtnl_newlink (net/core/rtnetlink.c:3557) 
[ 29.133278][ T266] ? lockdep_hardirqs_on_prepare (kernel/locking/lockdep.c:4299 kernel/locking/lockdep.c:4358) 
[ 29.133494][ T266] ? __create_object (mm/kmemleak.c:751) 
[ 29.133668][ T266] ? trace_kmalloc (./include/trace/events/kmem.h:54 (discriminator 52)) 
[ 29.133848][ T266] rtnl_newlink (net/core/rtnetlink.c:3744) 
[ 29.133993][ T266] rtnetlink_rcv_msg (net/core/rtnetlink.c:6647) 
[ 29.134181][ T266] ? __pfx_rtnetlink_rcv_msg (net/core/rtnetlink.c:6541) 
[ 29.134356][ T266] ? 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) 
[ 29.134533][ T266] ? mark_lock (kernel/locking/lockdep.c:4655 (discriminator 3)) 
[ 29.134668][ T266] ? __lock_acquire (kernel/locking/lockdep.c:5142) 
[ 29.134844][ T266] netlink_rcv_skb (net/netlink/af_netlink.c:2550) 
[ 29.135026][ T266] ? __pfx_rtnetlink_rcv_msg (net/core/rtnetlink.c:6541) 
[ 29.135198][ T266] ? __pfx_netlink_rcv_skb (net/netlink/af_netlink.c:2527) 
[ 29.135382][ T266] ? netlink_deliver_tap (./include/linux/rcupdate.h:336 ./include/linux/rcupdate.h:869 net/netlink/af_netlink.c:340) 
[ 29.135576][ T266] ? 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) 
[ 29.135772][ T266] netlink_unicast (net/netlink/af_netlink.c:1331 net/netlink/af_netlink.c:1357) 
[ 29.135949][ T266] ? __pfx_netlink_unicast (net/netlink/af_netlink.c:1342) 
[ 29.136120][ T266] ? find_held_lock (kernel/locking/lockdep.c:5249) 
[ 29.136298][ T266] netlink_sendmsg (net/netlink/af_netlink.c:1901) 
[ 29.136474][ T266] ? __pfx_netlink_sendmsg (net/netlink/af_netlink.c:1820) 
[ 29.136641][ T266] ? __might_fault (mm/memory.c:6388 mm/memory.c:6381) 
[ 29.136815][ T266] ? __import_iovec (lib/iov_iter.c:1263 lib/iov_iter.c:1279) 
[ 29.137001][ T266] ____sys_sendmsg (net/socket.c:730 net/socket.c:745 net/socket.c:2597) 
[ 29.137180][ T266] ? __pfx_____sys_sendmsg (net/socket.c:2543) 
[ 29.137350][ T266] ? __pfx_copy_msghdr_from_user (net/socket.c:2523) 
[ 29.137559][ T266] ? __pfx_validate_chain (kernel/locking/lockdep.c:3824) 
[ 29.137744][ T266] ___sys_sendmsg (net/socket.c:2653) 
[ 29.137919][ T266] ? __pfx____sys_sendmsg (net/socket.c:2640) 
[ 29.138091][ T266] ? find_held_lock (kernel/locking/lockdep.c:5249) 
[ 29.138264][ T266] ? __lock_release (kernel/locking/lockdep.c:5435) 
[ 29.138437][ T266] ? __debug_check_no_obj_freed (lib/debugobjects.c:1001) 
[ 29.138656][ T266] ? __pfx___lock_release (kernel/locking/lockdep.c:5411) 
[ 29.138838][ T266] ? __pfx_do_raw_spin_lock (kernel/locking/spinlock_debug.c:114) 
[ 29.139024][ T266] ? lockdep_hardirqs_on_prepare (kernel/locking/lockdep.c:4299 kernel/locking/lockdep.c:4358) 
[ 29.139247][ T266] ? __fget_light (./include/linux/atomic/atomic-arch-fallback.h:479 ./include/linux/atomic/atomic-instrumented.h:50 fs/file.c:1145) 
[ 29.139437][ T266] __sys_sendmsg (./include/linux/file.h:34 net/socket.c:2682) 
[ 29.139614][ T266] ? __pfx___sys_sendmsg (net/socket.c:2668) 
[ 29.139800][ T266] ? __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) 
[ 29.140006][ T266] do_syscall_64 (arch/x86/entry/common.c:52 arch/x86/entry/common.c:83) 
[ 29.140187][ T266] entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:130) 
[   29.140411][  T266] RIP: 0033:0x7fc25bbe67b7
[ 29.140604][ T266] 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)
[   29.141227][  T266] RSP: 002b:00007ffce6cf50f8 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
[   29.141495][  T266] RAX: ffffffffffffffda RBX: 00007ffce6cf5820 RCX: 00007fc25bbe67b7
[   29.141759][  T266] RDX: 0000000000000000 RSI: 00007ffce6cf5160 RDI: 0000000000000005
[   29.142019][  T266] RBP: 0000000000000004 R08: 0000000000000003 R09: 0000000000000000
[   29.142301][  T266] R10: 00000000184a9910 R11: 0000000000000246 R12: 0000000000000004


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