======================================
| [ 36.952214][ T337] #0: ffffffff9f9bc508 (rtnl_mutex){+.+.}-{3:3}, at: rtnetlink_rcv_msg (net/core/rtnetlink.c:6645) 
| [ 36.952583][ T337] #1: ffff88800821ac58 (&br->lock){+...}-{2:2}, at: br_add_if (net/bridge/br_if.c:683) bridge
| [   36.952988][  T337]
| [   36.952988][  T337] stack backtrace:
[   36.953501][  T337] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[   36.953915][  T337] Call Trace:
[   36.954064][  T337]  <TASK>
[ 36.954163][ T337] dump_stack_lvl (lib/dump_stack.c:122) 
[ 36.954353][ T337] lockdep_rcu_suspicious (./include/linux/context_tracking.h:153 kernel/locking/lockdep.c:6725) 
[ 36.954542][ T337] ? __pfx_br_handle_frame (net/bridge/br_input.c:326) bridge
[ 36.954806][ T337] br_get_link_af_size_filtered (net/bridge/br_private.h:930 net/bridge/br_private.h:940 net/bridge/br_netlink.c:105) bridge
[ 36.955070][ T337] ? __timer_delete (./include/linux/list.h:971 ./include/linux/timer.h:147 kernel/time/timer.c:1426) 
[ 36.955257][ T337] ? __timer_delete (./include/linux/list.h:971 ./include/linux/timer.h:147 kernel/time/timer.c:1426) 
[ 36.955450][ T337] br_info_notify (./include/linux/skbuff.h:1320 ./include/net/netlink.h:1015 net/bridge/br_netlink.c:645) bridge
[ 36.955676][ T337] ? mn_hlist_invalidate_range_start (mm/mmu_notifier.c:485 (discriminator 4)) 
[ 36.955918][ T337] br_make_forwarding (net/bridge/br_stp.c:465) bridge
[ 36.956138][ T337] br_port_state_selection (net/bridge/br_stp.c:495) bridge
[ 36.956404][ T337] br_stp_enable_port (net/bridge/br_stp_if.c:95) bridge
[ 36.956619][ T337] br_add_if (net/bridge/br_if.c:687) bridge
[ 36.956843][ T337] do_setlink (net/core/rtnetlink.c:2907) 
[ 36.957032][ T337] ? is_bpf_text_address (./include/linux/rcupdate.h:336 ./include/linux/rcupdate.h:869 ./kernel/bpf/core.c:769) 
[ 36.957226][ T337] ? __pfx_do_setlink (net/core/rtnetlink.c:2778) 
[ 36.957423][ T337] ? is_bpf_text_address (./kernel/bpf/core.c:772) 
[ 36.957613][ T337] ? kernel_text_address (kernel/extable.c:97 kernel/extable.c:94) 
[ 36.957809][ T337] ? __kernel_text_address (kernel/extable.c:79) 
[ 36.957997][ T337] ? unwind_get_return_address (arch/x86/kernel/unwind_orc.c:369 arch/x86/kernel/unwind_orc.c:364) 
[ 36.958196][ T337] ? __pfx_stack_trace_consume_entry (kernel/stacktrace.c:83) 
[ 36.958433][ T337] ? arch_stack_walk (arch/x86/kernel/stacktrace.c:26) 
[ 36.958633][ T337] ? stack_trace_save (kernel/stacktrace.c:123) 
[ 36.958822][ T337] ? __pfx_stack_trace_save (kernel/stacktrace.c:114) 
[ 36.959014][ T337] ? __pfx_validate_nla (lib/nlattr.c:396) 
[ 36.959208][ T337] ? mark_lock (kernel/locking/lockdep.c:4655 (discriminator 3)) 
[ 36.959359][ T337] ? kasan_save_stack (mm/kasan/common.c:49) 
[ 36.959554][ T337] ? __nla_validate_parse (lib/nlattr.c:638) 
[ 36.959746][ T337] __rtnl_newlink (net/core/rtnetlink.c:3696) 
[ 36.959939][ T337] ? 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) 
[ 36.960128][ T337] ? __pfx___rtnl_newlink (net/core/rtnetlink.c:3557) 
[ 36.960320][ T337] ? lockdep_hardirqs_on_prepare (kernel/locking/lockdep.c:4299 kernel/locking/lockdep.c:4358) 
[ 36.960560][ T337] ? __create_object (mm/kmemleak.c:751) 
[ 36.960750][ T337] ? trace_kmalloc (./include/trace/events/kmem.h:54 (discriminator 52)) 
[ 36.960949][ T337] rtnl_newlink (net/core/rtnetlink.c:3744) 
[ 36.961097][ T337] rtnetlink_rcv_msg (net/core/rtnetlink.c:6647) 
[ 36.961288][ T337] ? __pfx_rtnetlink_rcv_msg (net/core/rtnetlink.c:6541) 
[ 36.961473][ T337] ? 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) 
[ 36.961662][ T337] ? mark_lock (kernel/locking/lockdep.c:4655 (discriminator 3)) 
[ 36.961808][ T337] ? __lock_acquire (kernel/locking/lockdep.c:5142) 
[ 36.962002][ T337] netlink_rcv_skb (net/netlink/af_netlink.c:2550) 
[ 36.962199][ T337] ? __pfx_rtnetlink_rcv_msg (net/core/rtnetlink.c:6541) 
[ 36.962396][ T337] ? __pfx_netlink_rcv_skb (net/netlink/af_netlink.c:2527) 
[ 36.962599][ T337] ? netlink_deliver_tap (./include/linux/rcupdate.h:336 ./include/linux/rcupdate.h:869 net/netlink/af_netlink.c:340) 
[ 36.962787][ T337] ? 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) 
[ 36.962981][ T337] netlink_unicast (net/netlink/af_netlink.c:1331 net/netlink/af_netlink.c:1357) 
[ 36.963173][ T337] ? __pfx_netlink_unicast (net/netlink/af_netlink.c:1342) 
[ 36.963363][ T337] ? find_held_lock (kernel/locking/lockdep.c:5249) 
[ 36.963554][ T337] netlink_sendmsg (net/netlink/af_netlink.c:1901) 
[ 36.963745][ T337] ? __pfx_netlink_sendmsg (net/netlink/af_netlink.c:1820) 
[ 36.963936][ T337] ? __might_fault (mm/memory.c:6388 mm/memory.c:6381) 
[ 36.964125][ T337] ? __import_iovec (lib/iov_iter.c:1263 lib/iov_iter.c:1279) 
[ 36.964319][ T337] ____sys_sendmsg (net/socket.c:730 net/socket.c:745 net/socket.c:2597) 
[ 36.964505][ T337] ? __pfx_____sys_sendmsg (net/socket.c:2543) 
[ 36.964685][ T337] ? __pfx_copy_msghdr_from_user (net/socket.c:2523) 
[ 36.964913][ T337] ? __pfx_validate_chain (kernel/locking/lockdep.c:3824) 
[ 36.965117][ T337] ___sys_sendmsg (net/socket.c:2653) 
[ 36.965314][ T337] ? __pfx____sys_sendmsg (net/socket.c:2640) 
[ 36.965503][ T337] ? find_held_lock (kernel/locking/lockdep.c:5249) 
[ 36.965693][ T337] ? __lock_release (kernel/locking/lockdep.c:5435) 
[ 36.965880][ T337] ? __debug_check_no_obj_freed (lib/debugobjects.c:1001) 
[ 36.966118][ T337] ? __pfx___lock_release (kernel/locking/lockdep.c:5411) 
[ 36.966307][ T337] ? __pfx_do_raw_spin_lock (kernel/locking/spinlock_debug.c:114) 
[ 36.966498][ T337] ? lockdep_hardirqs_on_prepare (kernel/locking/lockdep.c:4299 kernel/locking/lockdep.c:4358) 
[ 36.966726][ T337] ? __fget_light (./include/linux/atomic/atomic-arch-fallback.h:479 ./include/linux/atomic/atomic-instrumented.h:50 fs/file.c:1145) 
[ 36.966923][ T337] __sys_sendmsg (./include/linux/file.h:34 net/socket.c:2682) 
[ 36.967113][ T337] ? __pfx___sys_sendmsg (net/socket.c:2668) 
[ 36.967296][ T337] ? __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) 
[ 36.967503][ T337] do_syscall_64 (arch/x86/entry/common.c:52 arch/x86/entry/common.c:83) 
[ 36.967691][ T337] entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:130) 
[   36.967946][  T337] RIP: 0033:0x7f37225d37b7
[ 36.968144][ T337] 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)
[   36.968944][  T337] RSP: 002b:00007fff292662e8 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
[   36.969338][  T337] RAX: ffffffffffffffda RBX: 00007fff29266a10 RCX: 00007f37225d37b7
[   36.969856][  T337] RDX: 0000000000000000 RSI: 00007fff29266350 RDI: 0000000000000005
[   36.970274][  T337] RBP: 0000000000000004 R08: 0000000000000003 R09: 0000000000000000
[   36.970669][  T337] R10: 0000000021b96910 R11: 0000000000000246 R12: 0000000000000004
[   36.971178][  T337] R13: 0000000066bea441 R14: 0000000000496600 R15: 0000000000000000
| [ 36.974009][ T337] #0: ffffffff9f9bc508 (rtnl_mutex){+.+.}-{3:3}, at: rtnetlink_rcv_msg (net/core/rtnetlink.c:6645) 
| [ 36.974349][ T337] #1: ffff88800821ac58 (&br->lock){+...}-{2:2}, at: br_add_if (net/bridge/br_if.c:683) bridge
| [   36.974830][  T337]
| [   36.974830][  T337] stack backtrace:
[   36.975344][  T337] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[   36.975870][  T337] Call Trace:
[   36.976011][  T337]  <TASK>
[ 36.976222][ T337] dump_stack_lvl (lib/dump_stack.c:122) 
[ 36.976418][ T337] lockdep_rcu_suspicious (./include/linux/context_tracking.h:153 kernel/locking/lockdep.c:6725) 
[ 36.976603][ T337] ? __pfx_br_handle_frame (net/bridge/br_input.c:326) bridge
[ 36.976989][ T337] br_get_link_af_size_filtered (net/bridge/br_private.h:453 net/bridge/br_private.h:940 net/bridge/br_netlink.c:105) bridge
[ 36.977249][ T337] ? __timer_delete (./include/linux/list.h:971 ./include/linux/timer.h:147 kernel/time/timer.c:1426) 
[ 36.977432][ T337] ? __timer_delete (./include/linux/list.h:971 ./include/linux/timer.h:147 kernel/time/timer.c:1426) 
[ 36.977629][ T337] br_info_notify (./include/linux/skbuff.h:1320 ./include/net/netlink.h:1015 net/bridge/br_netlink.c:645) bridge
[ 36.977956][ T337] ? mn_hlist_invalidate_range_start (mm/mmu_notifier.c:485 (discriminator 4)) 
[ 36.978202][ T337] br_make_forwarding (net/bridge/br_stp.c:465) bridge
[ 36.978420][ T337] br_port_state_selection (net/bridge/br_stp.c:495) bridge
[ 36.978686][ T337] br_stp_enable_port (net/bridge/br_stp_if.c:95) bridge
[ 36.979011][ T337] br_add_if (net/bridge/br_if.c:687) bridge
[ 36.979237][ T337] do_setlink (net/core/rtnetlink.c:2907) 
[ 36.979433][ T337] ? is_bpf_text_address (./include/linux/rcupdate.h:336 ./include/linux/rcupdate.h:869 ./kernel/bpf/core.c:769) 
[ 36.979623][ T337] ? __pfx_do_setlink (net/core/rtnetlink.c:2778) 
[ 36.980029][ T337] ? is_bpf_text_address (./kernel/bpf/core.c:772) 
[ 36.980214][ T337] ? kernel_text_address (kernel/extable.c:97 kernel/extable.c:94) 
[ 36.980399][ T337] ? __kernel_text_address (kernel/extable.c:79) 
[ 36.980585][ T337] ? unwind_get_return_address (arch/x86/kernel/unwind_orc.c:369 arch/x86/kernel/unwind_orc.c:364) 
[ 36.980881][ T337] ? __pfx_stack_trace_consume_entry (kernel/stacktrace.c:83) 
[ 36.981113][ T337] ? arch_stack_walk (arch/x86/kernel/stacktrace.c:26) 
[ 36.981313][ T337] ? stack_trace_save (kernel/stacktrace.c:123) 
[ 36.981496][ T337] ? __pfx_stack_trace_save (kernel/stacktrace.c:114) 
[ 36.981789][ T337] ? __pfx_validate_nla (lib/nlattr.c:396) 
[ 36.981989][ T337] ? mark_lock (kernel/locking/lockdep.c:4655 (discriminator 3)) 
[ 36.982133][ T337] ? kasan_save_stack (mm/kasan/common.c:49) 
[ 36.982324][ T337] ? __nla_validate_parse (lib/nlattr.c:638) 
[ 36.982519][ T337] __rtnl_newlink (net/core/rtnetlink.c:3696) 
[ 36.982841][ T337] ? 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) 
[ 36.983037][ T337] ? __pfx___rtnl_newlink (net/core/rtnetlink.c:3557) 
[ 36.983352][ T337] ? lockdep_hardirqs_on_prepare (kernel/locking/lockdep.c:4299 kernel/locking/lockdep.c:4358) 
[ 36.983581][ T337] ? __create_object (mm/kmemleak.c:751) 
[ 36.983769][ T337] ? trace_kmalloc (./include/trace/events/kmem.h:54 (discriminator 52)) 
[ 36.983964][ T337] rtnl_newlink (net/core/rtnetlink.c:3744) 
[ 36.984221][ T337] rtnetlink_rcv_msg (net/core/rtnetlink.c:6647) 
[ 36.984410][ T337] ? __pfx_rtnetlink_rcv_msg (net/core/rtnetlink.c:6541) 
[ 36.984594][ T337] ? 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) 
[ 36.984897][ T337] ? mark_lock (kernel/locking/lockdep.c:4655 (discriminator 3)) 
[ 36.985043][ T337] ? __lock_acquire (kernel/locking/lockdep.c:5142) 
[ 36.985236][ T337] netlink_rcv_skb (net/netlink/af_netlink.c:2550) 
[ 36.985423][ T337] ? __pfx_rtnetlink_rcv_msg (net/core/rtnetlink.c:6541) 
[ 36.985613][ T337] ? __pfx_netlink_rcv_skb (net/netlink/af_netlink.c:2527) 
[ 36.985816][ T337] ? netlink_deliver_tap (./include/linux/rcupdate.h:336 ./include/linux/rcupdate.h:869 net/netlink/af_netlink.c:340) 
[ 36.986005][ T337] ? 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) 
[ 36.986197][ T337] netlink_unicast (net/netlink/af_netlink.c:1331 net/netlink/af_netlink.c:1357) 
[ 36.986501][ T337] ? __pfx_netlink_unicast (net/netlink/af_netlink.c:1342) 
[ 36.986692][ T337] ? find_held_lock (kernel/locking/lockdep.c:5249) 
[ 36.986883][ T337] netlink_sendmsg (net/netlink/af_netlink.c:1901) 
[ 36.987080][ T337] ? __pfx_netlink_sendmsg (net/netlink/af_netlink.c:1820) 
[ 36.987379][ T337] ? __might_fault (mm/memory.c:6388 mm/memory.c:6381) 
[ 36.987570][ T337] ? __import_iovec (lib/iov_iter.c:1263 lib/iov_iter.c:1279) 
[ 36.987765][ T337] ____sys_sendmsg (net/socket.c:730 net/socket.c:745 net/socket.c:2597) 
[ 36.988074][ T337] ? __pfx_____sys_sendmsg (net/socket.c:2543) 
[ 36.988258][ T337] ? __pfx_copy_msghdr_from_user (net/socket.c:2523) 
[ 36.988597][ T337] ? __pfx_validate_chain (kernel/locking/lockdep.c:3824) 
[ 36.988800][ T337] ___sys_sendmsg (net/socket.c:2653) 
[ 36.988986][ T337] ? __pfx____sys_sendmsg (net/socket.c:2640) 
[ 36.989171][ T337] ? find_held_lock (kernel/locking/lockdep.c:5249) 
[ 36.989358][ T337] ? __lock_release (kernel/locking/lockdep.c:5435) 
[ 36.989541][ T337] ? __debug_check_no_obj_freed (lib/debugobjects.c:1001) 
[ 36.989778][ T337] ? __pfx___lock_release (kernel/locking/lockdep.c:5411) 
[ 36.989965][ T337] ? __pfx_do_raw_spin_lock (kernel/locking/spinlock_debug.c:114) 
[ 36.990272][ T337] ? lockdep_hardirqs_on_prepare (kernel/locking/lockdep.c:4299 kernel/locking/lockdep.c:4358) 
[ 36.990504][ T337] ? __fget_light (./include/linux/atomic/atomic-arch-fallback.h:479 ./include/linux/atomic/atomic-instrumented.h:50 fs/file.c:1145) 
[ 36.990698][ T337] __sys_sendmsg (./include/linux/file.h:34 net/socket.c:2682) 
[ 36.990887][ T337] ? __pfx___sys_sendmsg (net/socket.c:2668) 
[ 36.991180][ T337] ? __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) 
[ 36.991393][ T337] do_syscall_64 (arch/x86/entry/common.c:52 arch/x86/entry/common.c:83) 
[ 36.991584][ T337] entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:130) 
[   36.991813][  T337] RIP: 0033:0x7f37225d37b7
[ 36.992125][ T337] 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)
[   36.992869][  T337] RSP: 002b:00007fff292662e8 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
[   36.993146][  T337] RAX: ffffffffffffffda RBX: 00007fff29266a10 RCX: 00007f37225d37b7
[   36.993424][  T337] RDX: 0000000000000000 RSI: 00007fff29266350 RDI: 0000000000000005
[   36.993844][  T337] RBP: 0000000000000004 R08: 0000000000000003 R09: 0000000000000000
[   36.994124][  T337] R10: 0000000021b96910 R11: 0000000000000246 R12: 0000000000000004
[   36.994399][  T337] R13: 0000000066bea441 R14: 0000000000496600 R15: 0000000000000000
| [ 36.997039][ T337] #0: ffffffff9f9bc508 (rtnl_mutex){+.+.}-{3:3}, at: rtnetlink_rcv_msg (net/core/rtnetlink.c:6645) 
| [ 36.997504][ T337] #1: ffff88800821ac58 (&br->lock){+...}-{2:2}, at: br_add_if (net/bridge/br_if.c:683) bridge
| [   36.997869][  T337]
| [   36.997869][  T337] stack backtrace:
[   36.998407][  T337] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[   36.998812][  T337] Call Trace:
[   36.998953][  T337]  <TASK>
[ 36.999163][ T337] dump_stack_lvl (lib/dump_stack.c:122) 
[ 36.999367][ T337] lockdep_rcu_suspicious (./include/linux/context_tracking.h:153 kernel/locking/lockdep.c:6725) 
[ 36.999554][ T337] ? __pfx_br_handle_frame (net/bridge/br_input.c:326) bridge
[ 36.999819][ T337] br_get_link_af_size_filtered (net/bridge/br_private.h:1611 net/bridge/br_private.h:1608 net/bridge/br_netlink.c:107) bridge
[ 37.000198][ T337] ? __timer_delete (./include/linux/list.h:971 ./include/linux/timer.h:147 kernel/time/timer.c:1426) 
[ 37.000381][ T337] ? __timer_delete (./include/linux/list.h:971 ./include/linux/timer.h:147 kernel/time/timer.c:1426) 
[ 37.000569][ T337] br_info_notify (./include/linux/skbuff.h:1320 ./include/net/netlink.h:1015 net/bridge/br_netlink.c:645) bridge
[ 37.000782][ T337] ? mn_hlist_invalidate_range_start (mm/mmu_notifier.c:485 (discriminator 4)) 
[ 37.001143][ T337] br_make_forwarding (net/bridge/br_stp.c:465) bridge
[ 37.001361][ T337] br_port_state_selection (net/bridge/br_stp.c:495) bridge
[ 37.001626][ T337] br_stp_enable_port (net/bridge/br_stp_if.c:95) bridge
[ 37.001842][ T337] br_add_if (net/bridge/br_if.c:687) bridge
[ 37.002287][ T337] do_setlink (net/core/rtnetlink.c:2907) 
[ 37.002482][ T337] ? is_bpf_text_address (./include/linux/rcupdate.h:336 ./include/linux/rcupdate.h:869 ./kernel/bpf/core.c:769) 
[ 37.002667][ T337] ? __pfx_do_setlink (net/core/rtnetlink.c:2778) 
[ 37.002849][ T337] ? is_bpf_text_address (./kernel/bpf/core.c:772) 
[ 37.003175][ T337] ? kernel_text_address (kernel/extable.c:97 kernel/extable.c:94) 
[ 37.003361][ T337] ? __kernel_text_address (kernel/extable.c:79) 
[ 37.003542][ T337] ? unwind_get_return_address (arch/x86/kernel/unwind_orc.c:369 arch/x86/kernel/unwind_orc.c:364) 
[ 37.003728][ T337] ? __pfx_stack_trace_consume_entry (kernel/stacktrace.c:83) 
[ 37.004065][ T337] ? arch_stack_walk (arch/x86/kernel/stacktrace.c:26) 
[ 37.004260][ T337] ? stack_trace_save (kernel/stacktrace.c:123) 
[ 37.004457][ T337] ? __pfx_stack_trace_save (kernel/stacktrace.c:114) 
[ 37.004639][ T337] ? __pfx_validate_nla (lib/nlattr.c:396) 
[ 37.004823][ T337] ? mark_lock (kernel/locking/lockdep.c:4655 (discriminator 3)) 
[ 37.005075][ T337] ? kasan_save_stack (mm/kasan/common.c:49) 
[ 37.005261][ T337] ? __nla_validate_parse (lib/nlattr.c:638) 
[ 37.005453][ T337] __rtnl_newlink (net/core/rtnetlink.c:3696) 
[ 37.005643][ T337] ? 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) 
[ 37.005941][ T337] ? __pfx___rtnl_newlink (net/core/rtnetlink.c:3557) 
[ 37.006128][ T337] ? lockdep_hardirqs_on_prepare (kernel/locking/lockdep.c:4299 kernel/locking/lockdep.c:4358) 
[ 37.006356][ T337] ? __create_object (mm/kmemleak.c:751) 
[ 37.006542][ T337] ? trace_kmalloc (./include/trace/events/kmem.h:54 (discriminator 52)) 
[ 37.006840][ T337] rtnl_newlink (net/core/rtnetlink.c:3744) 
[ 37.006981][ T337] rtnetlink_rcv_msg (net/core/rtnetlink.c:6647) 
[ 37.007165][ T337] ? __pfx_rtnetlink_rcv_msg (net/core/rtnetlink.c:6541) 
[ 37.007357][ T337] ? 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) 
[ 37.007538][ T337] ? mark_lock (kernel/locking/lockdep.c:4655 (discriminator 3)) 
[ 37.007793][ T337] ? __lock_acquire (kernel/locking/lockdep.c:5142) 
[ 37.007979][ T337] netlink_rcv_skb (net/netlink/af_netlink.c:2550) 
[ 37.008227][ T337] ? __pfx_rtnetlink_rcv_msg (net/core/rtnetlink.c:6541) 
[ 37.008412][ T337] ? __pfx_netlink_rcv_skb (net/netlink/af_netlink.c:2527) 
[ 37.008736][ T337] ? netlink_deliver_tap (./include/linux/rcupdate.h:336 ./include/linux/rcupdate.h:869 net/netlink/af_netlink.c:340) 
[ 37.008921][ T337] ? 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) 
[ 37.009111][ T337] netlink_unicast (net/netlink/af_netlink.c:1331 net/netlink/af_netlink.c:1357) 
[ 37.009301][ T337] ? __pfx_netlink_unicast (net/netlink/af_netlink.c:1342) 
[ 37.009485][ T337] ? find_held_lock (kernel/locking/lockdep.c:5249) 
[ 37.009673][ T337] netlink_sendmsg (net/netlink/af_netlink.c:1901) 
[ 37.009860][ T337] ? __pfx_netlink_sendmsg (net/netlink/af_netlink.c:1820) 
[ 37.010045][ T337] ? __might_fault (mm/memory.c:6388 mm/memory.c:6381) 
[ 37.010232][ T337] ? __import_iovec (lib/iov_iter.c:1263 lib/iov_iter.c:1279) 
[ 37.010439][ T337] ____sys_sendmsg (net/socket.c:730 net/socket.c:745 net/socket.c:2597) 
[ 37.010632][ T337] ? __pfx_____sys_sendmsg (net/socket.c:2543) 
[ 37.010822][ T337] ? __pfx_copy_msghdr_from_user (net/socket.c:2523) 
[ 37.011047][ T337] ? __pfx_validate_chain (kernel/locking/lockdep.c:3824) 
[ 37.011246][ T337] ___sys_sendmsg (net/socket.c:2653) 
[ 37.011432][ T337] ? __pfx____sys_sendmsg (net/socket.c:2640) 
[ 37.011620][ T337] ? find_held_lock (kernel/locking/lockdep.c:5249) 
[ 37.011805][ T337] ? __lock_release (kernel/locking/lockdep.c:5435) 
[ 37.012101][ T337] ? __debug_check_no_obj_freed (lib/debugobjects.c:1001) 
[ 37.012333][ T337] ? __pfx___lock_release (kernel/locking/lockdep.c:5411) 
[ 37.012533][ T337] ? __pfx_do_raw_spin_lock (kernel/locking/spinlock_debug.c:114) 
[ 37.012726][ T337] ? lockdep_hardirqs_on_prepare (kernel/locking/lockdep.c:4299 kernel/locking/lockdep.c:4358) 
[ 37.013067][ T337] ? __fget_light (./include/linux/atomic/atomic-arch-fallback.h:479 ./include/linux/atomic/atomic-instrumented.h:50 fs/file.c:1145) 
[ 37.013258][ T337] __sys_sendmsg (./include/linux/file.h:34 net/socket.c:2682) 
[ 37.013445][ T337] ? __pfx___sys_sendmsg (net/socket.c:2668) 
[ 37.013630][ T337] ? __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) 
[ 37.013950][ T337] do_syscall_64 (arch/x86/entry/common.c:52 arch/x86/entry/common.c:83) 
[ 37.014140][ T337] entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:130) 
[   37.014373][  T337] RIP: 0033:0x7f37225d37b7
[ 37.014568][ T337] 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)
[   37.015311][  T337] RSP: 002b:00007fff292662e8 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
[   37.015723][  T337] RAX: ffffffffffffffda RBX: 00007fff29266a10 RCX: 00007f37225d37b7
[   37.015993][  T337] RDX: 0000000000000000 RSI: 00007fff29266350 RDI: 0000000000000005
[   37.016264][  T337] RBP: 0000000000000004 R08: 0000000000000003 R09: 0000000000000000
[   37.016534][  T337] R10: 0000000021b96910 R11: 0000000000000246 R12: 0000000000000004


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