======================================
| [   29.769977][  T263] 1 lock held by ip/263:
| [ 29.770119][ T263] #0: ffffffff88fd2948 (rtnl_mutex){+.+.}-{3:3}, at: rtnetlink_rcv_msg (net/core/rtnetlink.c:6645) 
| [   29.770477][  T263]
| [   29.770477][  T263] stack backtrace:
[   29.771013][  T263] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[   29.771423][  T263] Call Trace:
[   29.771582][  T263]  <TASK>
[ 29.771677][ T263] dump_stack_lvl (lib/dump_stack.c:122) 
[ 29.771861][ T263] lockdep_rcu_suspicious (./include/linux/context_tracking.h:153 kernel/locking/lockdep.c:6725) 
[ 29.772063][ T263] ? __pfx_br_handle_frame (net/bridge/br_input.c:326) 
[ 29.772261][ T263] br_get_link_af_size_filtered (net/bridge/br_private.h:930 net/bridge/br_private.h:940 net/bridge/br_netlink.c:105) 
[ 29.772493][ T263] br_info_notify (./include/linux/skbuff.h:1320 ./include/net/netlink.h:1015 net/bridge/br_netlink.c:645) 
[ 29.772680][ T263] ? lockdep_hardirqs_on_prepare (kernel/locking/lockdep.c:4299 kernel/locking/lockdep.c:4358) 
[ 29.772926][ T263] br_add_if (net/bridge/br_if.c:692) 
[ 29.773067][ T263] ? rtnl_is_locked (net/core/rtnetlink.c:164) 
[ 29.773247][ T263] ? netdev_master_upper_dev_get (net/core/dev.c:7102) 
[ 29.773469][ T263] do_setlink (net/core/rtnetlink.c:2907) 
[ 29.773654][ T263] ? is_bpf_text_address (./include/linux/rcupdate.h:336 ./include/linux/rcupdate.h:869 ./kernel/bpf/core.c:769) 
[ 29.773843][ T263] ? __pfx_do_setlink (net/core/rtnetlink.c:2778) 
[ 29.774026][ T263] ? is_bpf_text_address (./kernel/bpf/core.c:772) 
[ 29.774212][ T263] ? kernel_text_address (kernel/extable.c:97 kernel/extable.c:94) 
[ 29.774401][ T263] ? __kernel_text_address (kernel/extable.c:79) 
[ 29.774571][ T263] ? unwind_get_return_address (arch/x86/kernel/unwind_orc.c:369 arch/x86/kernel/unwind_orc.c:364) 
[ 29.774744][ T263] ? __pfx_stack_trace_consume_entry (kernel/stacktrace.c:83) 
[ 29.774960][ T263] ? arch_stack_walk (arch/x86/kernel/stacktrace.c:26) 
[ 29.775173][ T263] ? stack_trace_save (kernel/stacktrace.c:123) 
[ 29.775359][ T263] ? __pfx_stack_trace_save (kernel/stacktrace.c:114) 
[ 29.775548][ T263] ? __pfx_validate_nla (lib/nlattr.c:396) 
[ 29.775731][ T263] ? mark_lock (kernel/locking/lockdep.c:4655 (discriminator 3)) 
[ 29.775888][ T263] ? kasan_save_stack (mm/kasan/common.c:49) 
[ 29.776078][ T263] ? __nla_validate_parse (lib/nlattr.c:638) 
[ 29.776253][ T263] __rtnl_newlink (net/core/rtnetlink.c:3696) 
[ 29.776438][ T263] ? 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) 
[ 29.776616][ T263] ? __pfx___rtnl_newlink (net/core/rtnetlink.c:3557) 
[ 29.776797][ T263] ? lockdep_hardirqs_on_prepare (kernel/locking/lockdep.c:4299 kernel/locking/lockdep.c:4358) 
[ 29.777008][ T263] ? __create_object (mm/kmemleak.c:751) 
[ 29.777190][ T263] ? trace_kmalloc (./include/trace/events/kmem.h:54 (discriminator 52)) 
[ 29.777381][ T263] rtnl_newlink (net/core/rtnetlink.c:3744) 
[ 29.777515][ T263] rtnetlink_rcv_msg (net/core/rtnetlink.c:6647) 
[ 29.777689][ T263] ? __pfx_rtnetlink_rcv_msg (net/core/rtnetlink.c:6541) 
[ 29.777865][ T263] ? 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) 
[ 29.778050][ T263] ? mark_lock (kernel/locking/lockdep.c:4655 (discriminator 3)) 
[ 29.778193][ T263] ? __lock_acquire (kernel/locking/lockdep.c:5142) 
[ 29.778393][ T263] netlink_rcv_skb (net/netlink/af_netlink.c:2550) 
[ 29.778570][ T263] ? __pfx_rtnetlink_rcv_msg (net/core/rtnetlink.c:6541) 
[ 29.778772][ T263] ? __pfx_netlink_rcv_skb (net/netlink/af_netlink.c:2527) 
[ 29.778957][ T263] ? netlink_deliver_tap (./include/linux/rcupdate.h:336 ./include/linux/rcupdate.h:869 net/netlink/af_netlink.c:340) 
[ 29.779128][ T263] ? 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) 
[ 29.779308][ T263] netlink_unicast (net/netlink/af_netlink.c:1331 net/netlink/af_netlink.c:1357) 
[ 29.779507][ T263] ? __pfx_netlink_unicast (net/netlink/af_netlink.c:1342) 
[ 29.779699][ T263] ? find_held_lock (kernel/locking/lockdep.c:5249) 
[ 29.779909][ T263] netlink_sendmsg (net/netlink/af_netlink.c:1901) 
[ 29.780096][ T263] ? __pfx_netlink_sendmsg (net/netlink/af_netlink.c:1820) 
[ 29.780296][ T263] ? __might_fault (mm/memory.c:6388 mm/memory.c:6381) 
[ 29.780493][ T263] ? __import_iovec (lib/iov_iter.c:1263 lib/iov_iter.c:1279) 
[ 29.780679][ T263] ____sys_sendmsg (net/socket.c:730 net/socket.c:745 net/socket.c:2597) 
[ 29.780865][ T263] ? __pfx_____sys_sendmsg (net/socket.c:2543) 
[ 29.781042][ T263] ? __pfx_copy_msghdr_from_user (net/socket.c:2523) 
[ 29.781255][ T263] ? __pfx_validate_chain (kernel/locking/lockdep.c:3824) 
[ 29.781438][ T263] ___sys_sendmsg (net/socket.c:2653) 
[ 29.781613][ T263] ? __pfx____sys_sendmsg (net/socket.c:2640) 
[ 29.781791][ T263] ? find_held_lock (kernel/locking/lockdep.c:5249) 
[ 29.781970][ T263] ? __lock_release (kernel/locking/lockdep.c:5435) 
[ 29.782155][ T263] ? __debug_check_no_obj_freed (lib/debugobjects.c:1001) 
[ 29.782414][ T263] ? __pfx___lock_release (kernel/locking/lockdep.c:5411) 
[ 29.782626][ T263] ? __pfx_do_raw_spin_lock (kernel/locking/spinlock_debug.c:114) 
[ 29.782814][ T263] ? lockdep_hardirqs_on_prepare (kernel/locking/lockdep.c:4299 kernel/locking/lockdep.c:4358) 
[ 29.783044][ T263] ? __fget_light (./include/linux/atomic/atomic-arch-fallback.h:479 ./include/linux/atomic/atomic-instrumented.h:50 fs/file.c:1145) 
[ 29.783258][ T263] __sys_sendmsg (./include/linux/file.h:34 net/socket.c:2682) 
[ 29.783440][ T263] ? __pfx___sys_sendmsg (net/socket.c:2668) 
[ 29.783608][ T263] ? __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) 
[ 29.783804][ T263] do_syscall_64 (arch/x86/entry/common.c:52 arch/x86/entry/common.c:83) 
[ 29.783982][ T263] entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:130) 
[   29.784203][  T263] RIP: 0033:0x7fbb0f23f7b7
[ 29.784392][ T263] 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)
[   29.785007][  T263] RSP: 002b:00007ffef9fbb1f8 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
[   29.785275][  T263] RAX: ffffffffffffffda RBX: 00007ffef9fbb920 RCX: 00007fbb0f23f7b7
[   29.785549][  T263] RDX: 0000000000000000 RSI: 00007ffef9fbb260 RDI: 0000000000000005
[   29.785830][  T263] RBP: 0000000000000004 R08: 0000000000000003 R09: 0000000000000000
[   29.786129][  T263] R10: 000000000631b910 R11: 0000000000000246 R12: 0000000000000004
[   29.786409][  T263] R13: 0000000066be9e1f R14: 0000000000496600 R15: 0000000000000000
| [   29.788608][  T263] 1 lock held by ip/263:
| [ 29.788742][ T263] #0: ffffffff88fd2948 (rtnl_mutex){+.+.}-{3:3}, at: rtnetlink_rcv_msg (net/core/rtnetlink.c:6645) 
| [   29.789067][  T263]
| [   29.789067][  T263] stack backtrace:
[   29.789628][  T263] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[   29.790039][  T263] Call Trace:
[   29.790186][  T263]  <TASK>
[ 29.790288][ T263] dump_stack_lvl (lib/dump_stack.c:122) 
[ 29.790490][ T263] lockdep_rcu_suspicious (./include/linux/context_tracking.h:153 kernel/locking/lockdep.c:6725) 
[ 29.790679][ T263] br_get_link_af_size_filtered (net/bridge/br_private.h:453 net/bridge/br_private.h:940 net/bridge/br_netlink.c:105) 
[ 29.790921][ T263] br_info_notify (./include/linux/skbuff.h:1320 ./include/net/netlink.h:1015 net/bridge/br_netlink.c:645) 
[ 29.791103][ T263] ? lockdep_hardirqs_on_prepare (kernel/locking/lockdep.c:4299 kernel/locking/lockdep.c:4358) 
[ 29.791336][ T263] br_add_if (net/bridge/br_if.c:692) 
[ 29.791480][ T263] ? rtnl_is_locked (net/core/rtnetlink.c:164) 
[ 29.791663][ T263] ? netdev_master_upper_dev_get (net/core/dev.c:7102) 
[ 29.791900][ T263] do_setlink (net/core/rtnetlink.c:2907) 
[ 29.792088][ T263] ? is_bpf_text_address (./include/linux/rcupdate.h:336 ./include/linux/rcupdate.h:869 ./kernel/bpf/core.c:769) 
[ 29.792287][ T263] ? __pfx_do_setlink (net/core/rtnetlink.c:2778) 
[ 29.792485][ T263] ? is_bpf_text_address (./kernel/bpf/core.c:772) 
[ 29.792677][ T263] ? kernel_text_address (kernel/extable.c:97 kernel/extable.c:94) 
[ 29.792868][ T263] ? __kernel_text_address (kernel/extable.c:79) 
[ 29.793058][ T263] ? unwind_get_return_address (arch/x86/kernel/unwind_orc.c:369 arch/x86/kernel/unwind_orc.c:364) 
[ 29.793245][ T263] ? __pfx_stack_trace_consume_entry (kernel/stacktrace.c:83) 
[ 29.793477][ T263] ? arch_stack_walk (arch/x86/kernel/stacktrace.c:26) 
[ 29.793678][ T263] ? stack_trace_save (kernel/stacktrace.c:123) 
[ 29.793853][ T263] ? __pfx_stack_trace_save (kernel/stacktrace.c:114) 
[ 29.794049][ T263] ? __pfx_validate_nla (lib/nlattr.c:396) 
[ 29.794234][ T263] ? mark_lock (kernel/locking/lockdep.c:4655 (discriminator 3)) 
[ 29.794380][ T263] ? kasan_save_stack (mm/kasan/common.c:49) 
[ 29.794710][ T263] ? __nla_validate_parse (lib/nlattr.c:638) 
[ 29.794910][ T263] __rtnl_newlink (net/core/rtnetlink.c:3696) 
[ 29.795106][ T263] ? 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) 
[ 29.795300][ T263] ? __pfx___rtnl_newlink (net/core/rtnetlink.c:3557) 
[ 29.795590][ T263] ? lockdep_hardirqs_on_prepare (kernel/locking/lockdep.c:4299 kernel/locking/lockdep.c:4358) 
[ 29.795805][ T263] ? __create_object (mm/kmemleak.c:751) 
[ 29.795989][ T263] ? trace_kmalloc (./include/trace/events/kmem.h:54 (discriminator 52)) 
[ 29.796179][ T263] rtnl_newlink (net/core/rtnetlink.c:3744) 
[ 29.796409][ T263] rtnetlink_rcv_msg (net/core/rtnetlink.c:6647) 
[ 29.796598][ T263] ? __pfx_rtnetlink_rcv_msg (net/core/rtnetlink.c:6541) 
[ 29.796785][ T263] ? 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) 
[ 29.796991][ T263] ? mark_lock (kernel/locking/lockdep.c:4655 (discriminator 3)) 
[ 29.797139][ T263] ? __lock_acquire (kernel/locking/lockdep.c:5142) 
[ 29.797324][ T263] netlink_rcv_skb (net/netlink/af_netlink.c:2550) 
[ 29.797543][ T263] ? __pfx_rtnetlink_rcv_msg (net/core/rtnetlink.c:6541) 
[ 29.797738][ T263] ? __pfx_netlink_rcv_skb (net/netlink/af_netlink.c:2527) 
[ 29.797933][ T263] ? netlink_deliver_tap (./include/linux/rcupdate.h:336 ./include/linux/rcupdate.h:869 net/netlink/af_netlink.c:340) 
[ 29.798212][ T263] ? 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) 
[ 29.798400][ T263] netlink_unicast (net/netlink/af_netlink.c:1331 net/netlink/af_netlink.c:1357) 
[ 29.798606][ T263] ? __pfx_netlink_unicast (net/netlink/af_netlink.c:1342) 
[ 29.798804][ T263] ? find_held_lock (kernel/locking/lockdep.c:5249) 
[ 29.799087][ T263] netlink_sendmsg (net/netlink/af_netlink.c:1901) 
[ 29.799295][ T263] ? __pfx_netlink_sendmsg (net/netlink/af_netlink.c:1820) 
[ 29.799505][ T263] ? __might_fault (mm/memory.c:6388 mm/memory.c:6381) 
[ 29.799732][ T263] ? __import_iovec (lib/iov_iter.c:1263 lib/iov_iter.c:1279) 
[ 29.800030][ T263] ____sys_sendmsg (net/socket.c:730 net/socket.c:745 net/socket.c:2597) 
[ 29.800214][ T263] ? __pfx_____sys_sendmsg (net/socket.c:2543) 
[ 29.800398][ T263] ? __pfx_copy_msghdr_from_user (net/socket.c:2523) 
[ 29.800615][ T263] ? __pfx_validate_chain (kernel/locking/lockdep.c:3824) 
[ 29.800916][ T263] ___sys_sendmsg (net/socket.c:2653) 
[ 29.801119][ T263] ? __pfx____sys_sendmsg (net/socket.c:2640) 
[ 29.801328][ T263] ? find_held_lock (kernel/locking/lockdep.c:5249) 
[ 29.801534][ T263] ? __lock_release (kernel/locking/lockdep.c:5435) 
[ 29.801720][ T263] ? __debug_check_no_obj_freed (lib/debugobjects.c:1001) 
[ 29.802077][ T263] ? __pfx___lock_release (kernel/locking/lockdep.c:5411) 
[ 29.802259][ T263] ? __pfx_do_raw_spin_lock (kernel/locking/spinlock_debug.c:114) 
[ 29.802449][ T263] ? lockdep_hardirqs_on_prepare (kernel/locking/lockdep.c:4299 kernel/locking/lockdep.c:4358) 
[ 29.802792][ T263] ? __fget_light (./include/linux/atomic/atomic-arch-fallback.h:479 ./include/linux/atomic/atomic-instrumented.h:50 fs/file.c:1145) 
[ 29.802988][ T263] __sys_sendmsg (./include/linux/file.h:34 net/socket.c:2682) 
[ 29.803165][ T263] ? __pfx___sys_sendmsg (net/socket.c:2668) 
[ 29.803347][ T263] ? __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) 
[ 29.803547][ T263] do_syscall_64 (arch/x86/entry/common.c:52 arch/x86/entry/common.c:83) 
[ 29.803831][ T263] entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:130) 
[   29.804060][  T263] RIP: 0033:0x7fbb0f23f7b7
[ 29.804280][ T263] 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)
[   29.805010][  T263] RSP: 002b:00007ffef9fbb1f8 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
[   29.805297][  T263] RAX: ffffffffffffffda RBX: 00007ffef9fbb920 RCX: 00007fbb0f23f7b7
[   29.805715][  T263] RDX: 0000000000000000 RSI: 00007ffef9fbb260 RDI: 0000000000000005
[   29.805993][  T263] RBP: 0000000000000004 R08: 0000000000000003 R09: 0000000000000000
[   29.806271][  T263] R10: 000000000631b910 R11: 0000000000000246 R12: 0000000000000004


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