======================================
| [   29.713044][  T282] 1 lock held by ip/282:
| [ 29.713237][ T282] #0: ffffffffaa5d2948 (rtnl_mutex){+.+.}-{3:3}, at: rtnetlink_rcv_msg (net/core/rtnetlink.c:6645) 
| [   29.713696][  T282]
| [   29.713696][  T282] stack backtrace:
[   29.714335][  T282] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[   29.714840][  T282] Call Trace:
[   29.715037][  T282]  <TASK>
[ 29.715172][ T282] dump_stack_lvl (lib/dump_stack.c:122) 
[ 29.715436][ T282] lockdep_rcu_suspicious (./include/linux/context_tracking.h:153 kernel/locking/lockdep.c:6725) 
[ 29.715688][ T282] ? __pfx_br_handle_frame (net/bridge/br_input.c:326) 
[ 29.715942][ T282] br_get_link_af_size_filtered (net/bridge/br_private.h:930 net/bridge/br_private.h:940 net/bridge/br_netlink.c:105) 
[ 29.716241][ T282] br_info_notify (./include/linux/skbuff.h:1320 ./include/net/netlink.h:1015 net/bridge/br_netlink.c:645) 
[ 29.716476][ T282] ? lockdep_hardirqs_on_prepare (kernel/locking/lockdep.c:4299 kernel/locking/lockdep.c:4358) 
[ 29.716788][ T282] br_add_if (net/bridge/br_if.c:692) 
[ 29.716981][ T282] ? rtnl_is_locked (net/core/rtnetlink.c:164) 
[ 29.717226][ T282] ? netdev_master_upper_dev_get (net/core/dev.c:7102) 
[ 29.717541][ T282] do_setlink (net/core/rtnetlink.c:2907) 
[ 29.717797][ T282] ? is_bpf_text_address (./include/linux/rcupdate.h:336 ./include/linux/rcupdate.h:869 ./kernel/bpf/core.c:769) 
[ 29.718047][ T282] ? __pfx_do_setlink (net/core/rtnetlink.c:2778) 
[ 29.718302][ T282] ? is_bpf_text_address (./kernel/bpf/core.c:772) 
[ 29.718549][ T282] ? kernel_text_address (kernel/extable.c:97 kernel/extable.c:94) 
[ 29.718705][ T282] ? __kernel_text_address (kernel/extable.c:79) 
[ 29.718858][ T282] ? unwind_get_return_address (arch/x86/kernel/unwind_orc.c:369 arch/x86/kernel/unwind_orc.c:364) 
[ 29.719021][ T282] ? __pfx_stack_trace_consume_entry (kernel/stacktrace.c:83) 
[ 29.719214][ T282] ? arch_stack_walk (arch/x86/kernel/stacktrace.c:26) 
[ 29.719381][ T282] ? stack_trace_save (kernel/stacktrace.c:123) 
[ 29.719537][ T282] ? __pfx_stack_trace_save (kernel/stacktrace.c:114) 
[ 29.719695][ T282] ? __pfx_validate_nla (lib/nlattr.c:396) 
[ 29.719854][ T282] ? mark_lock (kernel/locking/lockdep.c:4655 (discriminator 3)) 
[ 29.719977][ T282] ? kasan_save_stack (mm/kasan/common.c:49) 
[ 29.720145][ T282] ? __nla_validate_parse (lib/nlattr.c:638) 
[ 29.720304][ T282] __rtnl_newlink (net/core/rtnetlink.c:3696) 
[ 29.720465][ T282] ? 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) 
[ 29.720624][ T282] ? __pfx___rtnl_newlink (net/core/rtnetlink.c:3557) 
[ 29.720787][ T282] ? lockdep_hardirqs_on_prepare (kernel/locking/lockdep.c:4299 kernel/locking/lockdep.c:4358) 
[ 29.720983][ T282] ? __create_object (mm/kmemleak.c:751) 
[ 29.721146][ T282] ? trace_kmalloc (./include/trace/events/kmem.h:54 (discriminator 52)) 
[ 29.721309][ T282] rtnl_newlink (net/core/rtnetlink.c:3744) 
[ 29.721428][ T282] rtnetlink_rcv_msg (net/core/rtnetlink.c:6647) 
[ 29.721586][ T282] ? __pfx_rtnetlink_rcv_msg (net/core/rtnetlink.c:6541) 
[ 29.721739][ T282] ? 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) 
[ 29.721893][ T282] ? mark_lock (kernel/locking/lockdep.c:4655 (discriminator 3)) 
[ 29.722027][ T282] ? __lock_acquire (kernel/locking/lockdep.c:5142) 
[ 29.722187][ T282] netlink_rcv_skb (net/netlink/af_netlink.c:2550) 
[ 29.722341][ T282] ? __pfx_rtnetlink_rcv_msg (net/core/rtnetlink.c:6541) 
[ 29.722495][ T282] ? __pfx_netlink_rcv_skb (net/netlink/af_netlink.c:2527) 
[ 29.722666][ T282] ? netlink_deliver_tap (./include/linux/rcupdate.h:336 ./include/linux/rcupdate.h:869 net/netlink/af_netlink.c:340) 
[ 29.722823][ T282] ? 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) 
[ 29.722988][ T282] netlink_unicast (net/netlink/af_netlink.c:1331 net/netlink/af_netlink.c:1357) 
[ 29.723182][ T282] ? __pfx_netlink_unicast (net/netlink/af_netlink.c:1342) 
[ 29.723342][ T282] ? find_held_lock (kernel/locking/lockdep.c:5249) 
[ 29.723501][ T282] netlink_sendmsg (net/netlink/af_netlink.c:1901) 
[ 29.723659][ T282] ? __pfx_netlink_sendmsg (net/netlink/af_netlink.c:1820) 
[ 29.723811][ T282] ? __might_fault (mm/memory.c:6388 mm/memory.c:6381) 
[ 29.723970][ T282] ? __import_iovec (lib/iov_iter.c:1263 lib/iov_iter.c:1279) 
[ 29.724144][ T282] ____sys_sendmsg (net/socket.c:730 net/socket.c:745 net/socket.c:2597) 
[ 29.724301][ T282] ? __pfx_____sys_sendmsg (net/socket.c:2543) 
[ 29.724454][ T282] ? __pfx_copy_msghdr_from_user (net/socket.c:2523) 
[ 29.724642][ T282] ? __pfx_validate_chain (kernel/locking/lockdep.c:3824) 
[ 29.724811][ T282] ___sys_sendmsg (net/socket.c:2653) 
[ 29.724968][ T282] ? __pfx____sys_sendmsg (net/socket.c:2640) 
[ 29.725140][ T282] ? find_held_lock (kernel/locking/lockdep.c:5249) 
[ 29.725298][ T282] ? __lock_release (kernel/locking/lockdep.c:5435) 
[ 29.725454][ T282] ? __debug_check_no_obj_freed (lib/debugobjects.c:1001) 
[ 29.725646][ T282] ? __pfx___lock_release (kernel/locking/lockdep.c:5411) 
[ 29.725801][ T282] ? __pfx_do_raw_spin_lock (kernel/locking/spinlock_debug.c:114) 
[ 29.725964][ T282] ? lockdep_hardirqs_on_prepare (kernel/locking/lockdep.c:4299 kernel/locking/lockdep.c:4358) 
[ 29.726176][ T282] ? __fget_light (./include/linux/atomic/atomic-arch-fallback.h:479 ./include/linux/atomic/atomic-instrumented.h:50 fs/file.c:1145) 
[ 29.726336][ T282] __sys_sendmsg (./include/linux/file.h:34 net/socket.c:2682) 
[ 29.726491][ T282] ? __pfx___sys_sendmsg (net/socket.c:2668) 
[ 29.726644][ T282] ? __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) 
[ 29.726819][ T282] do_syscall_64 (arch/x86/entry/common.c:52 arch/x86/entry/common.c:83) 
[ 29.726986][ T282] entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:130) 
[   29.727182][  T282] RIP: 0033:0x7fdb983697b7
[ 29.727350][ T282] 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)
[   29.727888][  T282] RSP: 002b:00007fff479fbbf8 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
[   29.728137][  T282] RAX: ffffffffffffffda RBX: 00007fff479fc330 RCX: 00007fdb983697b7
[   29.728365][  T282] RDX: 0000000000000000 RSI: 00007fff479fbc60 RDI: 0000000000000005
[   29.728594][  T282] RBP: 0000000000000003 R08: 0000000000000003 R09: 0000000000000000
[   29.728825][  T282] R10: 000000003cbca910 R11: 0000000000000246 R12: 0000000000000003
[   29.729064][  T282] R13: 0000000066bea47b R14: 0000000000496600 R15: 0000000000000000
| [   29.732077][  T282] 1 lock held by ip/282:
| [ 29.732197][ T282] #0: ffffffffaa5d2948 (rtnl_mutex){+.+.}-{3:3}, at: rtnetlink_rcv_msg (net/core/rtnetlink.c:6645) 
| [   29.732491][  T282]
| [   29.732491][  T282] stack backtrace:
[   29.732910][  T282] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[   29.733260][  T282] Call Trace:
[   29.733378][  T282]  <TASK>
[ 29.733463][ T282] dump_stack_lvl (lib/dump_stack.c:122) 
[ 29.733622][ T282] lockdep_rcu_suspicious (./include/linux/context_tracking.h:153 kernel/locking/lockdep.c:6725) 
[ 29.733781][ T282] br_get_link_af_size_filtered (net/bridge/br_private.h:453 net/bridge/br_private.h:940 net/bridge/br_netlink.c:105) 
[ 29.733974][ T282] br_info_notify (./include/linux/skbuff.h:1320 ./include/net/netlink.h:1015 net/bridge/br_netlink.c:645) 
[ 29.734142][ T282] ? lockdep_hardirqs_on_prepare (kernel/locking/lockdep.c:4299 kernel/locking/lockdep.c:4358) 
[ 29.734338][ T282] br_add_if (net/bridge/br_if.c:692) 
[ 29.734471][ T282] ? rtnl_is_locked (net/core/rtnetlink.c:164) 
[ 29.734623][ T282] ? netdev_master_upper_dev_get (net/core/dev.c:7102) 
[ 29.734816][ T282] do_setlink (net/core/rtnetlink.c:2907) 
[ 29.734970][ T282] ? is_bpf_text_address (./include/linux/rcupdate.h:336 ./include/linux/rcupdate.h:869 ./kernel/bpf/core.c:769) 
[ 29.735143][ T282] ? __pfx_do_setlink (net/core/rtnetlink.c:2778) 
[ 29.735298][ T282] ? is_bpf_text_address (./kernel/bpf/core.c:772) 
[ 29.735449][ T282] ? kernel_text_address (kernel/extable.c:97 kernel/extable.c:94) 
[ 29.735604][ T282] ? __kernel_text_address (kernel/extable.c:79) 
[ 29.735763][ T282] ? unwind_get_return_address (arch/x86/kernel/unwind_orc.c:369 arch/x86/kernel/unwind_orc.c:364) 
[ 29.735916][ T282] ? __pfx_stack_trace_consume_entry (kernel/stacktrace.c:83) 
[ 29.736114][ T282] ? arch_stack_walk (arch/x86/kernel/stacktrace.c:26) 
[ 29.736278][ T282] ? stack_trace_save (kernel/stacktrace.c:123) 
[ 29.736434][ T282] ? __pfx_stack_trace_save (kernel/stacktrace.c:114) 
[ 29.736587][ T282] ? __pfx_validate_nla (lib/nlattr.c:396) 
[ 29.736740][ T282] ? mark_lock (kernel/locking/lockdep.c:4655 (discriminator 3)) 
[ 29.736859][ T282] ? kasan_save_stack (mm/kasan/common.c:49) 
[ 29.737031][ T282] ? __nla_validate_parse (lib/nlattr.c:638) 
[ 29.737193][ T282] __rtnl_newlink (net/core/rtnetlink.c:3696) 
[ 29.737351][ T282] ? 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) 
[ 29.737504][ T282] ? __pfx___rtnl_newlink (net/core/rtnetlink.c:3557) 
[ 29.737669][ T282] ? lockdep_hardirqs_on_prepare (kernel/locking/lockdep.c:4299 kernel/locking/lockdep.c:4358) 
[ 29.737862][ T282] ? __create_object (mm/kmemleak.c:751) 
[ 29.738035][ T282] ? trace_kmalloc (./include/trace/events/kmem.h:54 (discriminator 52)) 
[ 29.738194][ T282] rtnl_newlink (net/core/rtnetlink.c:3744) 
[ 29.738313][ T282] rtnetlink_rcv_msg (net/core/rtnetlink.c:6647) 
[ 29.738479][ T282] ? __pfx_rtnetlink_rcv_msg (net/core/rtnetlink.c:6541) 
[ 29.738631][ T282] ? 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) 
[ 29.738784][ T282] ? mark_lock (kernel/locking/lockdep.c:4655 (discriminator 3)) 
[ 29.738908][ T282] ? __lock_acquire (kernel/locking/lockdep.c:5142) 
[ 29.739133][ T282] netlink_rcv_skb (net/netlink/af_netlink.c:2550) 
[ 29.739372][ T282] ? __pfx_rtnetlink_rcv_msg (net/core/rtnetlink.c:6541) 
[ 29.739615][ T282] ? __pfx_netlink_rcv_skb (net/netlink/af_netlink.c:2527) 
[ 29.739891][ T282] ? netlink_deliver_tap (./include/linux/rcupdate.h:336 ./include/linux/rcupdate.h:869 net/netlink/af_netlink.c:340) 
[ 29.740135][ T282] ? 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) 
[ 29.740393][ T282] netlink_unicast (net/netlink/af_netlink.c:1331 net/netlink/af_netlink.c:1357) 
[ 29.740637][ T282] ? __pfx_netlink_unicast (net/netlink/af_netlink.c:1342) 
[ 29.740862][ T282] ? find_held_lock (kernel/locking/lockdep.c:5249) 
[ 29.741093][ T282] netlink_sendmsg (net/netlink/af_netlink.c:1901) 
[ 29.741292][ T282] ? __pfx_netlink_sendmsg (net/netlink/af_netlink.c:1820) 
[ 29.741534][ T282] ? __might_fault (mm/memory.c:6388 mm/memory.c:6381) 
[ 29.741788][ T282] ? __import_iovec (lib/iov_iter.c:1263 lib/iov_iter.c:1279) 
[ 29.742051][ T282] ____sys_sendmsg (net/socket.c:730 net/socket.c:745 net/socket.c:2597) 
[ 29.742303][ T282] ? __pfx_____sys_sendmsg (net/socket.c:2543) 
[ 29.742547][ T282] ? __pfx_copy_msghdr_from_user (net/socket.c:2523) 
[ 29.742856][ T282] ? __pfx_validate_chain (kernel/locking/lockdep.c:3824) 
[ 29.743123][ T282] ___sys_sendmsg (net/socket.c:2653) 
[ 29.743379][ T282] ? __pfx____sys_sendmsg (net/socket.c:2640) 
[ 29.743634][ T282] ? find_held_lock (kernel/locking/lockdep.c:5249) 
[ 29.743887][ T282] ? __lock_release (kernel/locking/lockdep.c:5435) 
[ 29.744128][ T282] ? __debug_check_no_obj_freed (lib/debugobjects.c:1001) 
[ 29.744433][ T282] ? __pfx___lock_release (kernel/locking/lockdep.c:5411) 
[ 29.744680][ T282] ? __pfx_do_raw_spin_lock (kernel/locking/spinlock_debug.c:114) 
[ 29.744934][ T282] ? lockdep_hardirqs_on_prepare (kernel/locking/lockdep.c:4299 kernel/locking/lockdep.c:4358) 
[ 29.745243][ T282] ? __fget_light (./include/linux/atomic/atomic-arch-fallback.h:479 ./include/linux/atomic/atomic-instrumented.h:50 fs/file.c:1145) 
[ 29.745513][ T282] __sys_sendmsg (./include/linux/file.h:34 net/socket.c:2682) 
[ 29.745754][ T282] ? __pfx___sys_sendmsg (net/socket.c:2668) 
[ 29.745994][ T282] ? __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) 
[ 29.746287][ T282] do_syscall_64 (arch/x86/entry/common.c:52 arch/x86/entry/common.c:83) 
[ 29.746542][ T282] entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:130) 
[   29.746849][  T282] RIP: 0033:0x7fdb983697b7
[ 29.747111][ T282] 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)
[   29.747977][  T282] RSP: 002b:00007fff479fbbf8 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
[   29.748363][  T282] RAX: ffffffffffffffda RBX: 00007fff479fc330 RCX: 00007fdb983697b7
[   29.748744][  T282] RDX: 0000000000000000 RSI: 00007fff479fbc60 RDI: 0000000000000005
[   29.749128][  T282] RBP: 0000000000000003 R08: 0000000000000003 R09: 0000000000000000
[   29.749509][  T282] R10: 000000003cbca910 R11: 0000000000000246 R12: 0000000000000003


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