======================================
| [   30.573478][  T280] 1 lock held by bridge/280:
| [ 30.573636][ T280] #0: ffffffff9d1dcac8 (rtnl_mutex){+.+.}-{3:3}, at: rtnetlink_rcv_msg (net/core/rtnetlink.c:6645) 
| [   30.573934][  T280]
| [   30.573934][  T280] stack backtrace:
[   30.574354][  T280] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[   30.574705][  T280] Call Trace:
[   30.574838][  T280]  <TASK>
[ 30.574925][ T280] dump_stack_lvl (lib/dump_stack.c:122) 
[ 30.575093][ T280] lockdep_rcu_suspicious (./include/linux/context_tracking.h:153 kernel/locking/lockdep.c:6725) 
[ 30.575258][ T280] br_get_link_af_size_filtered (net/bridge/br_private.h:1605 net/bridge/br_private.h:1602 net/bridge/br_netlink.c:110) 
[ 30.575477][ T280] br_info_notify (./include/linux/skbuff.h:1320 ./include/net/netlink.h:1015 net/bridge/br_netlink.c:645) 
[ 30.575630][ T280] br_setlink (net/bridge/br_netlink.c:669 net/bridge/br_netlink.c:1136) 
[ 30.575751][ T280] ? __pfx_br_setlink (net/bridge/br_netlink.c:1085) 
[ 30.575909][ T280] ? lock_acquire.part.0 (kernel/locking/lockdep.c:466 kernel/locking/lockdep.c:5761) 
[ 30.576068][ T280] ? rtnetlink_rcv_msg (net/core/rtnetlink.c:6645) 
[ 30.576223][ T280] ? 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) 
[ 30.576382][ T280] ? __mutex_trylock_common (./arch/x86/include/asm/atomic64_64.h:101 ./include/linux/atomic/atomic-arch-fallback.h:4296 ./include/linux/atomic/atomic-long.h:1482 ./include/linux/atomic/atomic-instrumented.h:4458 kernel/locking/mutex.c:129) 
[ 30.576531][ T280] ? __pfx___mutex_trylock_common (kernel/locking/mutex.c:104) 
[ 30.576718][ T280] ? rtnetlink_rcv_msg (net/core/rtnetlink.c:6645) 
[ 30.576868][ T280] ? lock_acquire (kernel/locking/lockdep.c:5732) 
[ 30.577022][ T280] ? trace_contention_end (./include/trace/events/lock.h:122 (discriminator 52)) 
[ 30.577177][ T280] ? __mutex_lock (./arch/x86/include/asm/preempt.h:94 kernel/locking/mutex.c:618 kernel/locking/mutex.c:752) 
[ 30.577332][ T280] ? find_held_lock (kernel/locking/lockdep.c:5249) 
[ 30.577485][ T280] ? rtnetlink_rcv_msg (net/core/rtnetlink.c:6645) 
[ 30.577637][ T280] ? __pfx___mutex_lock (kernel/locking/mutex.c:751) 
[ 30.577791][ T280] ? __pfx___lock_release (kernel/locking/lockdep.c:5411) 
[ 30.577943][ T280] ? __pfx_lock_acquire.part.0 (kernel/locking/lockdep.c:5724) 
[ 30.578098][ T280] ? trace_lock_acquire (./include/trace/events/lock.h:24 (discriminator 52)) 
[ 30.578258][ T280] rtnl_bridge_setlink (net/core/rtnetlink.c:5225) 
[ 30.578427][ T280] rtnetlink_rcv_msg (net/core/rtnetlink.c:6647) 
[ 30.578578][ T280] ? __pfx_rtnetlink_rcv_msg (net/core/rtnetlink.c:6541) 
[ 30.578725][ T280] ? 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) 
[ 30.578871][ T280] ? mark_lock (kernel/locking/lockdep.c:4655 (discriminator 3)) 
[ 30.578989][ T280] ? __lock_acquire (kernel/locking/lockdep.c:5142) 
[ 30.579142][ T280] netlink_rcv_skb (net/netlink/af_netlink.c:2550) 
[ 30.579292][ T280] ? __pfx_rtnetlink_rcv_msg (net/core/rtnetlink.c:6541) 
[ 30.579444][ T280] ? __pfx_netlink_rcv_skb (net/netlink/af_netlink.c:2527) 
[ 30.579611][ T280] ? netlink_deliver_tap (./include/linux/rcupdate.h:336 ./include/linux/rcupdate.h:869 net/netlink/af_netlink.c:340) 
[ 30.579767][ T280] ? 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) 
[ 30.579920][ T280] netlink_unicast (net/netlink/af_netlink.c:1331 net/netlink/af_netlink.c:1357) 
[ 30.580078][ T280] ? __pfx_netlink_unicast (net/netlink/af_netlink.c:1342) 
[ 30.580233][ T280] ? find_held_lock (kernel/locking/lockdep.c:5249) 
[ 30.580393][ T280] netlink_sendmsg (net/netlink/af_netlink.c:1901) 
[ 30.580551][ T280] ? __pfx_netlink_sendmsg (net/netlink/af_netlink.c:1820) 
[ 30.580701][ T280] ? __might_fault (mm/memory.c:6388 mm/memory.c:6381) 
[ 30.580874][ T280] ? __import_iovec (lib/iov_iter.c:1263 lib/iov_iter.c:1279) 
[ 30.581043][ T280] ____sys_sendmsg (net/socket.c:730 net/socket.c:745 net/socket.c:2597) 
[ 30.581204][ T280] ? __pfx_____sys_sendmsg (net/socket.c:2543) 
[ 30.581355][ T280] ? __pfx_copy_msghdr_from_user (net/socket.c:2523) 
[ 30.581546][ T280] ? 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) 
[ 30.581707][ T280] ? validate_chain (./include/linux/hash.h:78 kernel/locking/lockdep.c:3758 kernel/locking/lockdep.c:3781 kernel/locking/lockdep.c:3836) 
[ 30.581867][ T280] ___sys_sendmsg (net/socket.c:2653) 
[ 30.582020][ T280] ? __pfx_validate_chain (kernel/locking/lockdep.c:3824) 
[ 30.582179][ T280] ? __pfx____sys_sendmsg (net/socket.c:2640) 
[ 30.582349][ T280] ? __lock_acquire (kernel/locking/lockdep.c:5142) 
[ 30.582514][ T280] ? find_held_lock (kernel/locking/lockdep.c:5249) 
[ 30.582670][ T280] ? __lock_release (kernel/locking/lockdep.c:5435) 
[ 30.582825][ T280] ? __fget_light (./include/linux/atomic/atomic-arch-fallback.h:479 ./include/linux/atomic/atomic-instrumented.h:50 fs/file.c:1145) 
[ 30.582981][ T280] ? trace_lock_acquire (./include/trace/events/lock.h:24 (discriminator 52)) 
[ 30.583142][ T280] __sys_sendmsg (./include/linux/file.h:34 net/socket.c:2682) 
[ 30.583292][ T280] ? __pfx___sys_sendmsg (net/socket.c:2668) 
[ 30.583465][ T280] do_syscall_64 (arch/x86/entry/common.c:52 arch/x86/entry/common.c:83) 
[ 30.583620][ T280] entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:130) 
[   30.583812][  T280] RIP: 0033:0x7f1e39f077b7
[ 30.583969][ T280] 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)
[   30.584499][  T280] RSP: 002b:00007ffd6749cf18 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
[   30.584736][  T280] RAX: ffffffffffffffda RBX: 000000000000ffff RCX: 00007f1e39f077b7
[   30.584954][  T280] RDX: 0000000000000000 RSI: 00007ffd6749cf80 RDI: 0000000000000005
[   30.585174][  T280] RBP: 00007ffd6749d070 R08: 0000000000000034 R09: 0000000000000000
[   30.585395][  T280] R10: 00007f1e39dc0708 R11: 0000000000000246 R12: 000000000000000a
[   30.585618][  T280] R13: 0000000066beaa47 R14: 0000000000423360 R15: 00007ffd6749d630
| [ 31.095159][ T283] #0: ffffffff9d1dcac8 (rtnl_mutex){+.+.}-{3:3}, at: rtnetlink_rcv_msg (net/core/rtnetlink.c:6645) 
| [ 31.095485][ T283] #1: ffff888008102c58 (&br->lock){+...}-{2:2}, at: br_add_if (net/bridge/br_if.c:683) 
| [   31.095783][  T283]
| [   31.095783][  T283] stack backtrace:
[   31.096241][  T283] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[   31.096590][  T283] Call Trace:
[   31.096717][  T283]  <TASK>
[ 31.096803][ T283] dump_stack_lvl (lib/dump_stack.c:122) 
[ 31.096972][ T283] lockdep_rcu_suspicious (./include/linux/context_tracking.h:153 kernel/locking/lockdep.c:6725) 
[ 31.097138][ T283] ? __pfx_br_handle_frame (net/bridge/br_input.c:326) 
[ 31.097315][ T283] br_get_link_af_size_filtered (net/bridge/br_private.h:930 net/bridge/br_private.h:940 net/bridge/br_netlink.c:105) 
[ 31.097528][ T283] ? __timer_delete (./include/linux/list.h:971 ./include/linux/timer.h:147 kernel/time/timer.c:1426) 
[ 31.097690][ T283] ? __timer_delete (./include/linux/list.h:971 ./include/linux/timer.h:147 kernel/time/timer.c:1426) 
[ 31.097855][ T283] br_info_notify (./include/linux/skbuff.h:1320 ./include/net/netlink.h:1015 net/bridge/br_netlink.c:645) 
[ 31.098020][ T283] ? __do_sys_set_mempolicy_home_node (mm/mempolicy.c:1557) 
[ 31.098236][ T283] br_make_forwarding (net/bridge/br_stp.c:465) 
[ 31.098400][ T283] br_port_state_selection (net/bridge/br_stp.c:495) 
[ 31.098563][ T283] br_stp_enable_port (net/bridge/br_stp_if.c:95) 
[ 31.098725][ T283] br_add_if (net/bridge/br_if.c:687) 
[ 31.098864][ T283] ? rtnl_is_locked (net/core/rtnetlink.c:164) 
[ 31.099028][ T283] ? netdev_master_upper_dev_get (net/core/dev.c:7102) 
[ 31.099234][ T283] do_setlink (net/core/rtnetlink.c:2907) 
[ 31.099398][ T283] ? is_bpf_text_address (./include/linux/rcupdate.h:336 ./include/linux/rcupdate.h:869 ./kernel/bpf/core.c:769) 
[ 31.099570][ T283] ? __pfx_do_setlink (net/core/rtnetlink.c:2778) 
[ 31.099738][ T283] ? is_bpf_text_address (./kernel/bpf/core.c:772) 
[ 31.099900][ T283] ? kernel_text_address (kernel/extable.c:97 kernel/extable.c:94) 
[ 31.100068][ T283] ? __kernel_text_address (kernel/extable.c:79) 
[ 31.100240][ T283] ? unwind_get_return_address (arch/x86/kernel/unwind_orc.c:369 arch/x86/kernel/unwind_orc.c:364) 
[ 31.100402][ T283] ? __pfx_stack_trace_consume_entry (kernel/stacktrace.c:83) 
[ 31.100603][ T283] ? arch_stack_walk (arch/x86/kernel/stacktrace.c:26) 
[ 31.100780][ T283] ? stack_trace_save (kernel/stacktrace.c:123) 
[ 31.100941][ T283] ? __pfx_stack_trace_save (kernel/stacktrace.c:114) 
[ 31.101105][ T283] ? __pfx_validate_nla (lib/nlattr.c:396) 
[ 31.101275][ T283] ? mark_lock (kernel/locking/lockdep.c:4655 (discriminator 3)) 
[ 31.101404][ T283] ? kasan_save_stack (mm/kasan/common.c:49) 
[ 31.101578][ T283] ? __nla_validate_parse (lib/nlattr.c:638) 
[ 31.101749][ T283] __rtnl_newlink (net/core/rtnetlink.c:3696) 
[ 31.101922][ T283] ? 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) 
[ 31.102091][ T283] ? __pfx___rtnl_newlink (net/core/rtnetlink.c:3557) 
[ 31.102268][ T283] ? lockdep_hardirqs_on_prepare (kernel/locking/lockdep.c:4299 kernel/locking/lockdep.c:4358) 
[ 31.102473][ T283] ? __create_object (mm/kmemleak.c:751) 
[ 31.102640][ T283] ? trace_kmalloc (./include/trace/events/kmem.h:54 (discriminator 52)) 
[ 31.102814][ T283] rtnl_newlink (net/core/rtnetlink.c:3744) 
[ 31.102947][ T283] rtnetlink_rcv_msg (net/core/rtnetlink.c:6647) 
[ 31.103121][ T283] ? __pfx_rtnetlink_rcv_msg (net/core/rtnetlink.c:6541) 
[ 31.103281][ T283] ? 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) 
[ 31.103446][ T283] ? mark_lock (kernel/locking/lockdep.c:4655 (discriminator 3)) 
[ 31.103576][ T283] ? __lock_acquire (kernel/locking/lockdep.c:5142) 
[ 31.103750][ T283] netlink_rcv_skb (net/netlink/af_netlink.c:2550) 
[ 31.103922][ T283] ? __pfx_rtnetlink_rcv_msg (net/core/rtnetlink.c:6541) 
[ 31.104087][ T283] ? __pfx_netlink_rcv_skb (net/netlink/af_netlink.c:2527) 
[ 31.104268][ T283] ? netlink_deliver_tap (./include/linux/rcupdate.h:336 ./include/linux/rcupdate.h:869 net/netlink/af_netlink.c:340) 
[ 31.104430][ T283] ? 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) 
[ 31.104600][ T283] netlink_unicast (net/netlink/af_netlink.c:1331 net/netlink/af_netlink.c:1357) 
[ 31.104768][ T283] ? __pfx_netlink_unicast (net/netlink/af_netlink.c:1342) 
[ 31.104929][ T283] ? find_held_lock (kernel/locking/lockdep.c:5249) 
[ 31.105097][ T283] netlink_sendmsg (net/netlink/af_netlink.c:1901) 
[ 31.105266][ T283] ? __pfx_netlink_sendmsg (net/netlink/af_netlink.c:1820) 
[ 31.105425][ T283] ? __might_fault (mm/memory.c:6388 mm/memory.c:6381) 
[ 31.105601][ T283] ? __import_iovec (lib/iov_iter.c:1263 lib/iov_iter.c:1279) 
[ 31.105774][ T283] ____sys_sendmsg (net/socket.c:730 net/socket.c:745 net/socket.c:2597) 
[ 31.105946][ T283] ? __pfx_____sys_sendmsg (net/socket.c:2543) 
[ 31.106106][ T283] ? __pfx_copy_msghdr_from_user (net/socket.c:2523) 
[ 31.106312][ T283] ? __pfx_validate_chain (kernel/locking/lockdep.c:3824) 
[ 31.106486][ T283] ___sys_sendmsg (net/socket.c:2653) 
[ 31.106658][ T283] ? __pfx____sys_sendmsg (net/socket.c:2640) 
[ 31.106825][ T283] ? find_held_lock (kernel/locking/lockdep.c:5249) 
[ 31.107359][ T283] ? __lock_release (kernel/locking/lockdep.c:5435) 
[ 31.107524][ T283] ? __debug_check_no_obj_freed (lib/debugobjects.c:1001) 
[ 31.107746][ T283] ? __pfx___lock_release (kernel/locking/lockdep.c:5411) 
[ 31.107909][ T283] ? __pfx_do_raw_spin_lock (kernel/locking/spinlock_debug.c:114) 
[ 31.108079][ T283] ? lockdep_hardirqs_on_prepare (kernel/locking/lockdep.c:4299 kernel/locking/lockdep.c:4358) 
[ 31.108282][ T283] ? __fget_light (./include/linux/atomic/atomic-arch-fallback.h:479 ./include/linux/atomic/atomic-instrumented.h:50 fs/file.c:1145) 
[ 31.108466][ T283] __sys_sendmsg (./include/linux/file.h:34 net/socket.c:2682) 
[ 31.108637][ T283] ? __pfx___sys_sendmsg (net/socket.c:2668) 
[ 31.108808][ T283] ? __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) 
[ 31.108992][ T283] do_syscall_64 (arch/x86/entry/common.c:52 arch/x86/entry/common.c:83) 
[ 31.109159][ T283] entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:130) 
[   31.109372][  T283] RIP: 0033:0x7f500e1527b7
[ 31.109549][ T283] 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)
[   31.110126][  T283] RSP: 002b:00007fff2b2a8b98 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
[   31.110366][  T283] RAX: ffffffffffffffda RBX: 00007fff2b2a92d0 RCX: 00007f500e1527b7
[   31.110609][  T283] RDX: 0000000000000000 RSI: 00007fff2b2a8c00 RDI: 0000000000000005
[   31.110855][  T283] RBP: 0000000000000004 R08: 0000000000000003 R09: 0000000000000000
[   31.111095][  T283] R10: 000000000d8b5910 R11: 0000000000000246 R12: 0000000000000004
[   31.111341][  T283] R13: 0000000066beaa46 R14: 0000000000496600 R15: 0000000000000000
| [ 31.113383][ T283] #0: ffffffff9d1dcac8 (rtnl_mutex){+.+.}-{3:3}, at: rtnetlink_rcv_msg (net/core/rtnetlink.c:6645) 
| [ 31.113675][ T283] #1: ffff888008102c58 (&br->lock){+...}-{2:2}, at: br_add_if (net/bridge/br_if.c:683) 
| [   31.113959][  T283]
| [   31.113959][  T283] stack backtrace:
[   31.114388][  T283] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[   31.114750][  T283] Call Trace:
[   31.114878][  T283]  <TASK>
[ 31.114968][ T283] dump_stack_lvl (lib/dump_stack.c:122) 
[ 31.115136][ T283] lockdep_rcu_suspicious (./include/linux/context_tracking.h:153 kernel/locking/lockdep.c:6725) 
[ 31.115293][ T283] ? __pfx_br_handle_frame (net/bridge/br_input.c:326) 
[ 31.115468][ T283] br_get_link_af_size_filtered (net/bridge/br_private.h:453 net/bridge/br_private.h:940 net/bridge/br_netlink.c:105) 
[ 31.115674][ T283] ? __timer_delete (./include/linux/list.h:971 ./include/linux/timer.h:147 kernel/time/timer.c:1426) 
[ 31.115845][ T283] ? __timer_delete (./include/linux/list.h:971 ./include/linux/timer.h:147 kernel/time/timer.c:1426) 
[ 31.116010][ T283] br_info_notify (./include/linux/skbuff.h:1320 ./include/net/netlink.h:1015 net/bridge/br_netlink.c:645) 
[ 31.116177][ T283] ? __do_sys_set_mempolicy_home_node (mm/mempolicy.c:1557) 
[ 31.116403][ T283] br_make_forwarding (net/bridge/br_stp.c:465) 
[ 31.116567][ T283] br_port_state_selection (net/bridge/br_stp.c:495) 
[ 31.116735][ T283] br_stp_enable_port (net/bridge/br_stp_if.c:95) 
[ 31.116903][ T283] br_add_if (net/bridge/br_if.c:687) 
[ 31.117028][ T283] ? rtnl_is_locked (net/core/rtnetlink.c:164) 
[ 31.117186][ T283] ? netdev_master_upper_dev_get (net/core/dev.c:7102) 
[ 31.117389][ T283] do_setlink (net/core/rtnetlink.c:2907) 
[ 31.117562][ T283] ? is_bpf_text_address (./include/linux/rcupdate.h:336 ./include/linux/rcupdate.h:869 ./kernel/bpf/core.c:769) 
[ 31.117727][ T283] ? __pfx_do_setlink (net/core/rtnetlink.c:2778) 
[ 31.117905][ T283] ? is_bpf_text_address (./kernel/bpf/core.c:772) 
[ 31.118068][ T283] ? kernel_text_address (kernel/extable.c:97 kernel/extable.c:94) 
[ 31.118236][ T283] ? __kernel_text_address (kernel/extable.c:79) 
[ 31.118403][ T283] ? unwind_get_return_address (arch/x86/kernel/unwind_orc.c:369 arch/x86/kernel/unwind_orc.c:364) 
[ 31.118567][ T283] ? __pfx_stack_trace_consume_entry (kernel/stacktrace.c:83) 
[ 31.118764][ T283] ? arch_stack_walk (arch/x86/kernel/stacktrace.c:26) 
[ 31.118934][ T283] ? stack_trace_save (kernel/stacktrace.c:123) 
[ 31.119103][ T283] ? __pfx_stack_trace_save (kernel/stacktrace.c:114) 
[ 31.119272][ T283] ? __pfx_validate_nla (lib/nlattr.c:396) 
[ 31.119443][ T283] ? mark_lock (kernel/locking/lockdep.c:4655 (discriminator 3)) 
[ 31.119572][ T283] ? kasan_save_stack (mm/kasan/common.c:49) 
[ 31.119751][ T283] ? __nla_validate_parse (lib/nlattr.c:638) 
[ 31.119919][ T283] __rtnl_newlink (net/core/rtnetlink.c:3696) 
[ 31.120084][ T283] ? 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) 
[ 31.120243][ T283] ? __pfx___rtnl_newlink (net/core/rtnetlink.c:3557) 
[ 31.120705][ T283] ? lockdep_hardirqs_on_prepare (kernel/locking/lockdep.c:4299 kernel/locking/lockdep.c:4358) 
[ 31.120921][ T283] ? __create_object (mm/kmemleak.c:751) 
[ 31.121086][ T283] ? trace_kmalloc (./include/trace/events/kmem.h:54 (discriminator 52)) 
[ 31.121258][ T283] rtnl_newlink (net/core/rtnetlink.c:3744) 
[ 31.121386][ T283] rtnetlink_rcv_msg (net/core/rtnetlink.c:6647) 
[ 31.121546][ T283] ? __pfx_rtnetlink_rcv_msg (net/core/rtnetlink.c:6541) 
[ 31.121700][ T283] ? 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) 
[ 31.121858][ T283] ? mark_lock (kernel/locking/lockdep.c:4655 (discriminator 3)) 
[ 31.121983][ T283] ? __lock_acquire (kernel/locking/lockdep.c:5142) 
[ 31.122151][ T283] netlink_rcv_skb (net/netlink/af_netlink.c:2550) 
[ 31.122328][ T283] ? __pfx_rtnetlink_rcv_msg (net/core/rtnetlink.c:6541) 
[ 31.122488][ T283] ? __pfx_netlink_rcv_skb (net/netlink/af_netlink.c:2527) 
[ 31.122658][ T283] ? netlink_deliver_tap (./include/linux/rcupdate.h:336 ./include/linux/rcupdate.h:869 net/netlink/af_netlink.c:340) 
[ 31.122820][ T283] ? 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) 
[ 31.122977][ T283] netlink_unicast (net/netlink/af_netlink.c:1331 net/netlink/af_netlink.c:1357) 
[ 31.123135][ T283] ? __pfx_netlink_unicast (net/netlink/af_netlink.c:1342) 
[ 31.123296][ T283] ? find_held_lock (kernel/locking/lockdep.c:5249) 
[ 31.123466][ T283] netlink_sendmsg (net/netlink/af_netlink.c:1901) 
[ 31.123633][ T283] ? __pfx_netlink_sendmsg (net/netlink/af_netlink.c:1820) 
[ 31.123788][ T283] ? __might_fault (mm/memory.c:6388 mm/memory.c:6381) 
[ 31.123946][ T283] ? __import_iovec (lib/iov_iter.c:1263 lib/iov_iter.c:1279) 
[ 31.124112][ T283] ____sys_sendmsg (net/socket.c:730 net/socket.c:745 net/socket.c:2597) 
[ 31.124278][ T283] ? __pfx_____sys_sendmsg (net/socket.c:2543) 
[ 31.124437][ T283] ? __pfx_copy_msghdr_from_user (net/socket.c:2523) 
[ 31.124634][ T283] ? __pfx_validate_chain (kernel/locking/lockdep.c:3824) 
[ 31.124811][ T283] ___sys_sendmsg (net/socket.c:2653) 
[ 31.124981][ T283] ? __pfx____sys_sendmsg (net/socket.c:2640) 
[ 31.125139][ T283] ? find_held_lock (kernel/locking/lockdep.c:5249) 
[ 31.125302][ T283] ? __lock_release (kernel/locking/lockdep.c:5435) 
[ 31.125468][ T283] ? __debug_check_no_obj_freed (lib/debugobjects.c:1001) 
[ 31.125675][ T283] ? __pfx___lock_release (kernel/locking/lockdep.c:5411) 
[ 31.125833][ T283] ? __pfx_do_raw_spin_lock (kernel/locking/spinlock_debug.c:114) 
[ 31.126003][ T283] ? lockdep_hardirqs_on_prepare (kernel/locking/lockdep.c:4299 kernel/locking/lockdep.c:4358) 
[ 31.126214][ T283] ? __fget_light (./include/linux/atomic/atomic-arch-fallback.h:479 ./include/linux/atomic/atomic-instrumented.h:50 fs/file.c:1145) 
[ 31.126382][ T283] __sys_sendmsg (./include/linux/file.h:34 net/socket.c:2682) 
[ 31.126540][ T283] ? __pfx___sys_sendmsg (net/socket.c:2668) 
[ 31.126696][ T283] ? __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) 
[ 31.126878][ T283] do_syscall_64 (arch/x86/entry/common.c:52 arch/x86/entry/common.c:83) 
[ 31.127042][ T283] entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:130) 
[   31.127243][  T283] RIP: 0033:0x7f500e1527b7
[ 31.127416][ T283] 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)
[   31.127984][  T283] RSP: 002b:00007fff2b2a8b98 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
[   31.128224][  T283] RAX: ffffffffffffffda RBX: 00007fff2b2a92d0 RCX: 00007f500e1527b7
[   31.128466][  T283] RDX: 0000000000000000 RSI: 00007fff2b2a8c00 RDI: 0000000000000005
[   31.128715][  T283] RBP: 0000000000000004 R08: 0000000000000003 R09: 0000000000000000
[   31.128962][  T283] R10: 000000000d8b5910 R11: 0000000000000246 R12: 0000000000000004
[   31.129207][  T283] R13: 0000000066beaa46 R14: 0000000000496600 R15: 0000000000000000
| [ 31.131228][ T283] #0: ffffffff9d1dcac8 (rtnl_mutex){+.+.}-{3:3}, at: rtnetlink_rcv_msg (net/core/rtnetlink.c:6645) 
| [ 31.131515][ T283] #1: ffff888008102c58 (&br->lock){+...}-{2:2}, at: br_add_if (net/bridge/br_if.c:683) 
| [   31.131798][  T283]
| [   31.131798][  T283] stack backtrace:
[   31.132232][  T283] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[   31.132604][  T283] Call Trace:
[   31.132732][  T283]  <TASK>
[ 31.132820][ T283] dump_stack_lvl (lib/dump_stack.c:122) 
[ 31.132982][ T283] lockdep_rcu_suspicious (./include/linux/context_tracking.h:153 kernel/locking/lockdep.c:6725) 
[ 31.133136][ T283] ? __pfx_br_handle_frame (net/bridge/br_input.c:326) 
[ 31.133298][ T283] br_get_link_af_size_filtered (net/bridge/br_private.h:1611 net/bridge/br_private.h:1608 net/bridge/br_netlink.c:107) 
[ 31.133503][ T283] ? __timer_delete (./include/linux/list.h:971 ./include/linux/timer.h:147 kernel/time/timer.c:1426) 
[ 31.133664][ T283] ? __timer_delete (./include/linux/list.h:971 ./include/linux/timer.h:147 kernel/time/timer.c:1426) 
[ 31.133824][ T283] br_info_notify (./include/linux/skbuff.h:1320 ./include/net/netlink.h:1015 net/bridge/br_netlink.c:645) 
[ 31.133990][ T283] ? __do_sys_set_mempolicy_home_node (mm/mempolicy.c:1557) 
[ 31.134207][ T283] br_make_forwarding (net/bridge/br_stp.c:465) 
[ 31.134366][ T283] br_port_state_selection (net/bridge/br_stp.c:495) 
[ 31.134530][ T283] br_stp_enable_port (net/bridge/br_stp_if.c:95) 
[ 31.134892][ T283] br_add_if (net/bridge/br_if.c:687) 
[ 31.135021][ T283] ? rtnl_is_locked (net/core/rtnetlink.c:164) 
[ 31.135185][ T283] ? netdev_master_upper_dev_get (net/core/dev.c:7102) 
[ 31.135389][ T283] do_setlink (net/core/rtnetlink.c:2907) 
[ 31.135654][ T283] ? is_bpf_text_address (./include/linux/rcupdate.h:336 ./include/linux/rcupdate.h:869 ./kernel/bpf/core.c:769) 
[ 31.135824][ T283] ? __pfx_do_setlink (net/core/rtnetlink.c:2778) 
[ 31.135983][ T283] ? is_bpf_text_address (./kernel/bpf/core.c:772) 
[ 31.136143][ T283] ? kernel_text_address (kernel/extable.c:97 kernel/extable.c:94) 
[ 31.136305][ T283] ? __kernel_text_address (kernel/extable.c:79) 
[ 31.136558][ T283] ? unwind_get_return_address (arch/x86/kernel/unwind_orc.c:369 arch/x86/kernel/unwind_orc.c:364) 
[ 31.136717][ T283] ? __pfx_stack_trace_consume_entry (kernel/stacktrace.c:83) 
[ 31.136914][ T283] ? arch_stack_walk (arch/x86/kernel/stacktrace.c:26) 
[ 31.137092][ T283] ? stack_trace_save (kernel/stacktrace.c:123) 
[ 31.137345][ T283] ? __pfx_stack_trace_save (kernel/stacktrace.c:114) 
[ 31.137500][ T283] ? __pfx_validate_nla (lib/nlattr.c:396) 
[ 31.137658][ T283] ? mark_lock (kernel/locking/lockdep.c:4655 (discriminator 3)) 
[ 31.137780][ T283] ? kasan_save_stack (mm/kasan/common.c:49) 
[ 31.138141][ T283] ? __nla_validate_parse (lib/nlattr.c:638) 
[ 31.138311][ T283] __rtnl_newlink (net/core/rtnetlink.c:3696) 
[ 31.138473][ T283] ? 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) 
[ 31.138631][ T283] ? __pfx___rtnl_newlink (net/core/rtnetlink.c:3557) 
[ 31.138888][ T283] ? lockdep_hardirqs_on_prepare (kernel/locking/lockdep.c:4299 kernel/locking/lockdep.c:4358) 
[ 31.139081][ T283] ? __create_object (mm/kmemleak.c:751) 
[ 31.139237][ T283] ? trace_kmalloc (./include/trace/events/kmem.h:54 (discriminator 52)) 
[ 31.139409][ T283] rtnl_newlink (net/core/rtnetlink.c:3744) 
[ 31.139529][ T283] rtnetlink_rcv_msg (net/core/rtnetlink.c:6647) 
[ 31.139782][ T283] ? __pfx_rtnetlink_rcv_msg (net/core/rtnetlink.c:6541) 
[ 31.139941][ T283] ? 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) 
[ 31.140095][ T283] ? mark_lock (kernel/locking/lockdep.c:4655 (discriminator 3)) 
[ 31.140218][ T283] ? __lock_acquire (kernel/locking/lockdep.c:5142) 
[ 31.140468][ T283] netlink_rcv_skb (net/netlink/af_netlink.c:2550) 
[ 31.140627][ T283] ? __pfx_rtnetlink_rcv_msg (net/core/rtnetlink.c:6541) 
[ 31.140782][ T283] ? __pfx_netlink_rcv_skb (net/netlink/af_netlink.c:2527) 
[ 31.140951][ T283] ? netlink_deliver_tap (./include/linux/rcupdate.h:336 ./include/linux/rcupdate.h:869 net/netlink/af_netlink.c:340) 
[ 31.141200][ T283] ? 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) 
[ 31.141362][ T283] netlink_unicast (net/netlink/af_netlink.c:1331 net/netlink/af_netlink.c:1357) 
[ 31.141520][ T283] ? __pfx_netlink_unicast (net/netlink/af_netlink.c:1342) 
[ 31.141681][ T283] ? find_held_lock (kernel/locking/lockdep.c:5249) 
[ 31.141839][ T283] netlink_sendmsg (net/netlink/af_netlink.c:1901) 
[ 31.142088][ T283] ? __pfx_netlink_sendmsg (net/netlink/af_netlink.c:1820) 
[ 31.142246][ T283] ? __might_fault (mm/memory.c:6388 mm/memory.c:6381) 
[ 31.142408][ T283] ? __import_iovec (lib/iov_iter.c:1263 lib/iov_iter.c:1279) 
[ 31.142570][ T283] ____sys_sendmsg (net/socket.c:730 net/socket.c:745 net/socket.c:2597) 
[ 31.142824][ T283] ? __pfx_____sys_sendmsg (net/socket.c:2543) 
[ 31.142981][ T283] ? __pfx_copy_msghdr_from_user (net/socket.c:2523) 
[ 31.143173][ T283] ? __pfx_validate_chain (kernel/locking/lockdep.c:3824) 
[ 31.143338][ T283] ___sys_sendmsg (net/socket.c:2653) 
[ 31.143591][ T283] ? __pfx____sys_sendmsg (net/socket.c:2640) 
[ 31.143749][ T283] ? find_held_lock (kernel/locking/lockdep.c:5249) 
[ 31.143907][ T283] ? __lock_release (kernel/locking/lockdep.c:5435) 
[ 31.144067][ T283] ? __debug_check_no_obj_freed (lib/debugobjects.c:1001) 
[ 31.144360][ T283] ? __pfx___lock_release (kernel/locking/lockdep.c:5411) 
[ 31.144517][ T283] ? __pfx_do_raw_spin_lock (kernel/locking/spinlock_debug.c:114) 
[ 31.144679][ T283] ? lockdep_hardirqs_on_prepare (kernel/locking/lockdep.c:4299 kernel/locking/lockdep.c:4358) 
[ 31.144873][ T283] ? __fget_light (./include/linux/atomic/atomic-arch-fallback.h:479 ./include/linux/atomic/atomic-instrumented.h:50 fs/file.c:1145) 
[ 31.145043][ T283] __sys_sendmsg (./include/linux/file.h:34 net/socket.c:2682) 
[ 31.145205][ T283] ? __pfx___sys_sendmsg (net/socket.c:2668) 
[ 31.145358][ T283] ? __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) 
[ 31.145537][ T283] do_syscall_64 (arch/x86/entry/common.c:52 arch/x86/entry/common.c:83) 
[ 31.145790][ T283] entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:130) 
[   31.145983][  T283] RIP: 0033:0x7f500e1527b7
[ 31.146154][ T283] 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)
[   31.146800][  T283] RSP: 002b:00007fff2b2a8b98 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
[   31.147040][  T283] RAX: ffffffffffffffda RBX: 00007fff2b2a92d0 RCX: 00007f500e1527b7
[   31.147382][  T283] RDX: 0000000000000000 RSI: 00007fff2b2a8c00 RDI: 0000000000000005
[   31.147625][  T283] RBP: 0000000000000004 R08: 0000000000000003 R09: 0000000000000000
[   31.147872][  T283] R10: 000000000d8b5910 R11: 0000000000000246 R12: 0000000000000004


Finger prints:
lockdep_rcu_suspicious:br_get_link_af_size_filtered:br_info_notify:br_setlink:rtnl_bridge_setlink
lockdep_rcu_suspicious:br_get_link_af_size_filtered:br_info_notify:br_make_forwarding:br_port_state_selection