======================================
| [ 1258.651446][ T8198] #0: ffffffff901dcac8 (rtnl_mutex){+.+.}-{3:3}, at: rtnetlink_rcv_msg (net/core/rtnetlink.c:6645) 
| [ 1258.651766][ T8198] #1: ffff88800a612c58 (&br->lock){+...}-{2:2}, at: br_add_if (net/bridge/br_if.c:683) 
| [ 1258.652070][ T8198]
| [ 1258.652070][ T8198] stack backtrace:
[ 1258.652558][ T8198] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[ 1258.652943][ T8198] Call Trace:
[ 1258.653084][ T8198]  <TASK>
[ 1258.653179][ T8198] dump_stack_lvl (lib/dump_stack.c:122) 
[ 1258.653359][ T8198] lockdep_rcu_suspicious (./include/linux/context_tracking.h:153 kernel/locking/lockdep.c:6725) 
[ 1258.653534][ T8198] ? __pfx_br_handle_frame (net/bridge/br_input.c:326) 
[ 1258.653720][ T8198] br_get_link_af_size_filtered (net/bridge/br_private.h:930 net/bridge/br_private.h:940 net/bridge/br_netlink.c:105) 
[ 1258.653952][ T8198] ? __timer_delete (./include/linux/list.h:971 ./include/linux/timer.h:147 kernel/time/timer.c:1426) 
[ 1258.654129][ T8198] ? __timer_delete (./include/linux/list.h:971 ./include/linux/timer.h:147 kernel/time/timer.c:1426) 
[ 1258.654303][ T8198] br_info_notify (./include/linux/skbuff.h:1320 ./include/net/netlink.h:1015 net/bridge/br_netlink.c:645) 
[ 1258.654481][ T8198] br_make_forwarding (net/bridge/br_stp.c:465) 
[ 1258.654660][ T8198] br_port_state_selection (net/bridge/br_stp.c:495) 
[ 1258.654840][ T8198] br_stp_enable_port (net/bridge/br_stp_if.c:95) 
[ 1258.655013][ T8198] br_add_if (net/bridge/br_if.c:687) 
[ 1258.655149][ T8198] ? rtnl_is_locked (net/core/rtnetlink.c:164) 
[ 1258.655326][ T8198] ? netdev_master_upper_dev_get (net/core/dev.c:7102) 
[ 1258.655557][ T8198] do_setlink (net/core/rtnetlink.c:2907) 
[ 1258.655733][ T8198] ? is_bpf_text_address (./include/linux/rcupdate.h:336 ./include/linux/rcupdate.h:869 ./kernel/bpf/core.c:769) 
[ 1258.655910][ T8198] ? __pfx_do_setlink (net/core/rtnetlink.c:2778) 
[ 1258.656084][ T8198] ? is_bpf_text_address (./kernel/bpf/core.c:772) 
[ 1258.656255][ T8198] ? kernel_text_address (kernel/extable.c:97 kernel/extable.c:94) 
[ 1258.656435][ T8198] ? __kernel_text_address (kernel/extable.c:79) 
[ 1258.656620][ T8198] ? unwind_get_return_address (arch/x86/kernel/unwind_orc.c:369 arch/x86/kernel/unwind_orc.c:364) 
[ 1258.656793][ T8198] ? __pfx_stack_trace_consume_entry (kernel/stacktrace.c:83) 
[ 1258.657013][ T8198] ? arch_stack_walk (arch/x86/kernel/stacktrace.c:26) 
[ 1258.657205][ T8198] ? stack_trace_save (kernel/stacktrace.c:123) 
[ 1258.657375][ T8198] ? __pfx_stack_trace_save (kernel/stacktrace.c:114) 
[ 1258.657548][ T8198] ? __pfx_validate_nla (lib/nlattr.c:396) 
[ 1258.657737][ T8198] ? mark_lock (kernel/locking/lockdep.c:4655 (discriminator 3)) 
[ 1258.657887][ T8198] ? kasan_save_stack (mm/kasan/common.c:49) 
[ 1258.658065][ T8198] ? __nla_validate_parse (lib/nlattr.c:638) 
[ 1258.658247][ T8198] __rtnl_newlink (net/core/rtnetlink.c:3696) 
[ 1258.658428][ T8198] ? 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) 
[ 1258.658605][ T8198] ? __pfx___rtnl_newlink (net/core/rtnetlink.c:3557) 
[ 1258.658784][ T8198] ? lockdep_hardirqs_on_prepare (kernel/locking/lockdep.c:4299 kernel/locking/lockdep.c:4358) 
[ 1258.658998][ T8198] ? __create_object (mm/kmemleak.c:751) 
[ 1258.659171][ T8198] ? trace_kmalloc (./include/trace/events/kmem.h:54 (discriminator 52)) 
[ 1258.659353][ T8198] rtnl_newlink (net/core/rtnetlink.c:3744) 
[ 1258.659485][ T8198] rtnetlink_rcv_msg (net/core/rtnetlink.c:6647) 
[ 1258.659662][ T8198] ? __pfx_rtnetlink_rcv_msg (net/core/rtnetlink.c:6541) 
[ 1258.659831][ T8198] ? 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) 
[ 1258.660005][ T8198] ? mark_lock (kernel/locking/lockdep.c:4655 (discriminator 3)) 
[ 1258.660144][ T8198] ? __lock_acquire (kernel/locking/lockdep.c:5142) 
[ 1258.660316][ T8198] netlink_rcv_skb (net/netlink/af_netlink.c:2550) 
[ 1258.660489][ T8198] ? __pfx_rtnetlink_rcv_msg (net/core/rtnetlink.c:6541) 
[ 1258.660661][ T8198] ? __pfx_netlink_rcv_skb (net/netlink/af_netlink.c:2527) 
[ 1258.660854][ T8198] ? netlink_deliver_tap (./include/linux/rcupdate.h:336 ./include/linux/rcupdate.h:869 net/netlink/af_netlink.c:340) 
[ 1258.661024][ T8198] ? 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) 
[ 1258.661198][ T8198] netlink_unicast (net/netlink/af_netlink.c:1331 net/netlink/af_netlink.c:1357) 
[ 1258.661376][ T8198] ? __pfx_netlink_unicast (net/netlink/af_netlink.c:1342) 
[ 1258.661546][ T8198] ? find_held_lock (kernel/locking/lockdep.c:5249) 
[ 1258.661739][ T8198] netlink_sendmsg (net/netlink/af_netlink.c:1901) 
[ 1258.661926][ T8198] ? __pfx_netlink_sendmsg (net/netlink/af_netlink.c:1820) 
[ 1258.662094][ T8198] ? __might_fault (mm/memory.c:6388 mm/memory.c:6381) 
[ 1258.662267][ T8198] ? __import_iovec (lib/iov_iter.c:1263 lib/iov_iter.c:1279) 
[ 1258.662447][ T8198] ____sys_sendmsg (net/socket.c:730 net/socket.c:745 net/socket.c:2597) 
[ 1258.662619][ T8198] ? __pfx_____sys_sendmsg (net/socket.c:2543) 
[ 1258.662790][ T8198] ? __pfx_copy_msghdr_from_user (net/socket.c:2523) 
[ 1258.663003][ T8198] ? __pfx_validate_chain (kernel/locking/lockdep.c:3824) 
[ 1258.663187][ T8198] ___sys_sendmsg (net/socket.c:2653) 
[ 1258.663357][ T8198] ? __pfx____sys_sendmsg (net/socket.c:2640) 
[ 1258.663526][ T8198] ? find_held_lock (kernel/locking/lockdep.c:5249) 
[ 1258.663697][ T8198] ? __lock_release (kernel/locking/lockdep.c:5435) 
[ 1258.663864][ T8198] ? __debug_check_no_obj_freed (lib/debugobjects.c:1001) 
[ 1258.664074][ T8198] ? __pfx___lock_release (kernel/locking/lockdep.c:5411) 
[ 1258.664250][ T8198] ? __pfx_do_raw_spin_lock (kernel/locking/spinlock_debug.c:114) 
[ 1258.664426][ T8198] ? lockdep_hardirqs_on_prepare (kernel/locking/lockdep.c:4299 kernel/locking/lockdep.c:4358) 
[ 1258.664640][ T8198] ? __fget_light (./include/linux/atomic/atomic-arch-fallback.h:479 ./include/linux/atomic/atomic-instrumented.h:50 fs/file.c:1145) 
[ 1258.664817][ T8198] __sys_sendmsg (./include/linux/file.h:34 net/socket.c:2682) 
[ 1258.664985][ T8198] ? __pfx___sys_sendmsg (net/socket.c:2668) 
[ 1258.665151][ T8198] ? __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) 
[ 1258.665345][ T8198] do_syscall_64 (arch/x86/entry/common.c:52 arch/x86/entry/common.c:83) 
[ 1258.665515][ T8198] entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:130) 
[ 1258.665749][ T8198] RIP: 0033:0x7f39a3b1f7b7
[ 1258.665934][ T8198] 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)
[ 1258.666543][ T8198] RSP: 002b:00007ffff3f8b2d8 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
[ 1258.666807][ T8198] RAX: ffffffffffffffda RBX: 00007ffff3f8ba00 RCX: 00007f39a3b1f7b7
[ 1258.667068][ T8198] RDX: 0000000000000000 RSI: 00007ffff3f8b340 RDI: 0000000000000005
[ 1258.667322][ T8198] RBP: 0000000000000003 R08: 0000000000000003 R09: 0000000000000000
[ 1258.667584][ T8198] R10: 000000001dbff910 R11: 0000000000000246 R12: 0000000000000003
[ 1258.667838][ T8198] R13: 0000000066beb00f R14: 0000000000496600 R15: 0000000000000000
| [ 1258.670106][ T8198] #0: ffffffff901dcac8 (rtnl_mutex){+.+.}-{3:3}, at: rtnetlink_rcv_msg (net/core/rtnetlink.c:6645) 
| [ 1258.670594][ T8198] #1: ffff88800a612c58 (&br->lock){+...}-{2:2}, at: br_add_if (net/bridge/br_if.c:683) 
| [ 1258.671032][ T8198]
| [ 1258.671032][ T8198] stack backtrace:
[ 1258.671635][ T8198] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[ 1258.672245][ T8198] Call Trace:
[ 1258.672379][ T8198]  <TASK>
[ 1258.672591][ T8198] dump_stack_lvl (lib/dump_stack.c:122) 
[ 1258.672769][ T8198] lockdep_rcu_suspicious (./include/linux/context_tracking.h:153 kernel/locking/lockdep.c:6725) 
[ 1258.673050][ T8198] ? __pfx_br_handle_frame (net/bridge/br_input.c:326) 
[ 1258.673230][ T8198] br_get_link_af_size_filtered (net/bridge/br_private.h:453 net/bridge/br_private.h:940 net/bridge/br_netlink.c:105) 
[ 1258.673558][ T8198] ? __timer_delete (./include/linux/list.h:971 ./include/linux/timer.h:147 kernel/time/timer.c:1426) 
[ 1258.673870][ T8198] ? __timer_delete (./include/linux/list.h:971 ./include/linux/timer.h:147 kernel/time/timer.c:1426) 
[ 1258.674182][ T8198] br_info_notify (./include/linux/skbuff.h:1320 ./include/net/netlink.h:1015 net/bridge/br_netlink.c:645) 
[ 1258.674468][ T8198] br_make_forwarding (net/bridge/br_stp.c:465) 
[ 1258.674773][ T8198] br_port_state_selection (net/bridge/br_stp.c:495) 
[ 1258.675062][ T8198] br_stp_enable_port (net/bridge/br_stp_if.c:95) 
[ 1258.675337][ T8198] br_add_if (net/bridge/br_if.c:687) 
[ 1258.675632][ T8198] ? rtnl_is_locked (net/core/rtnetlink.c:164) 
[ 1258.675803][ T8198] ? netdev_master_upper_dev_get (net/core/dev.c:7102) 
[ 1258.676117][ T8198] do_setlink (net/core/rtnetlink.c:2907) 
[ 1258.676394][ T8198] ? is_bpf_text_address (./include/linux/rcupdate.h:336 ./include/linux/rcupdate.h:869 ./kernel/bpf/core.c:769) 
[ 1258.676687][ T8198] ? __pfx_do_setlink (net/core/rtnetlink.c:2778) 
[ 1258.676969][ T8198] ? is_bpf_text_address (./kernel/bpf/core.c:772) 
[ 1258.677258][ T8198] ? kernel_text_address (kernel/extable.c:97 kernel/extable.c:94) 
[ 1258.677551][ T8198] ? __kernel_text_address (kernel/extable.c:79) 
[ 1258.677860][ T8198] ? unwind_get_return_address (arch/x86/kernel/unwind_orc.c:369 arch/x86/kernel/unwind_orc.c:364) 
[ 1258.678150][ T8198] ? __pfx_stack_trace_consume_entry (kernel/stacktrace.c:83) 
[ 1258.678489][ T8198] ? arch_stack_walk (arch/x86/kernel/stacktrace.c:26) 
[ 1258.678680][ T8198] ? stack_trace_save (kernel/stacktrace.c:123) 
[ 1258.678954][ T8198] ? __pfx_stack_trace_save (kernel/stacktrace.c:114) 
[ 1258.679127][ T8198] ? __pfx_validate_nla (lib/nlattr.c:396) 
[ 1258.679408][ T8198] ? mark_lock (kernel/locking/lockdep.c:4655 (discriminator 3)) 
[ 1258.679548][ T8198] ? kasan_save_stack (mm/kasan/common.c:49) 
[ 1258.679843][ T8198] ? __nla_validate_parse (lib/nlattr.c:638) 
[ 1258.680135][ T8198] __rtnl_newlink (net/core/rtnetlink.c:3696) 
[ 1258.680420][ T8198] ? 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) 
[ 1258.680595][ T8198] ? __pfx___rtnl_newlink (net/core/rtnetlink.c:3557) 
[ 1258.680884][ T8198] ? lockdep_hardirqs_on_prepare (kernel/locking/lockdep.c:4299 kernel/locking/lockdep.c:4358) 
[ 1258.681218][ T8198] ? __create_object (mm/kmemleak.c:751) 
[ 1258.681517][ T8198] ? trace_kmalloc (./include/trace/events/kmem.h:54 (discriminator 52)) 
[ 1258.681816][ T8198] rtnl_newlink (net/core/rtnetlink.c:3744) 
[ 1258.681950][ T8198] rtnetlink_rcv_msg (net/core/rtnetlink.c:6647) 
[ 1258.682225][ T8198] ? __pfx_rtnetlink_rcv_msg (net/core/rtnetlink.c:6541) 
[ 1258.682626][ T8198] ? 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) 
[ 1258.682797][ T8198] ? mark_lock (kernel/locking/lockdep.c:4655 (discriminator 3)) 
[ 1258.683052][ T8198] ? __lock_acquire (kernel/locking/lockdep.c:5142) 
[ 1258.683347][ T8198] netlink_rcv_skb (net/netlink/af_netlink.c:2550) 
[ 1258.683643][ T8198] ? __pfx_rtnetlink_rcv_msg (net/core/rtnetlink.c:6541) 
[ 1258.683931][ T8198] ? __pfx_netlink_rcv_skb (net/netlink/af_netlink.c:2527) 
[ 1258.684236][ T8198] ? netlink_deliver_tap (./include/linux/rcupdate.h:336 ./include/linux/rcupdate.h:869 net/netlink/af_netlink.c:340) 
[ 1258.684516][ T8198] ? 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) 
[ 1258.684795][ T8198] netlink_unicast (net/netlink/af_netlink.c:1331 net/netlink/af_netlink.c:1357) 
[ 1258.685079][ T8198] ? __pfx_netlink_unicast (net/netlink/af_netlink.c:1342) 
[ 1258.685350][ T8198] ? find_held_lock (kernel/locking/lockdep.c:5249) 
[ 1258.685545][ T8198] netlink_sendmsg (net/netlink/af_netlink.c:1901) 
[ 1258.685846][ T8198] ? __pfx_netlink_sendmsg (net/netlink/af_netlink.c:1820) 
[ 1258.686125][ T8198] ? __might_fault (mm/memory.c:6388 mm/memory.c:6381) 
[ 1258.686403][ T8198] ? __import_iovec (lib/iov_iter.c:1263 lib/iov_iter.c:1279) 
[ 1258.686696][ T8198] ____sys_sendmsg (net/socket.c:730 net/socket.c:745 net/socket.c:2597) 
[ 1258.686975][ T8198] ? __pfx_____sys_sendmsg (net/socket.c:2543) 
[ 1258.687255][ T8198] ? __pfx_copy_msghdr_from_user (net/socket.c:2523) 
[ 1258.687582][ T8198] ? __pfx_validate_chain (kernel/locking/lockdep.c:3824) 
[ 1258.687971][ T8198] ___sys_sendmsg (net/socket.c:2653) 
[ 1258.688249][ T8198] ? __pfx____sys_sendmsg (net/socket.c:2640) 
[ 1258.688524][ T8198] ? find_held_lock (kernel/locking/lockdep.c:5249) 
[ 1258.688705][ T8198] ? __lock_release (kernel/locking/lockdep.c:5435) 
[ 1258.688981][ T8198] ? __debug_check_no_obj_freed (lib/debugobjects.c:1001) 
[ 1258.689304][ T8198] ? __pfx___lock_release (kernel/locking/lockdep.c:5411) 
[ 1258.689483][ T8198] ? __pfx_do_raw_spin_lock (kernel/locking/spinlock_debug.c:114) 
[ 1258.689665][ T8198] ? lockdep_hardirqs_on_prepare (kernel/locking/lockdep.c:4299 kernel/locking/lockdep.c:4358) 
[ 1258.690007][ T8198] ? __fget_light (./include/linux/atomic/atomic-arch-fallback.h:479 ./include/linux/atomic/atomic-instrumented.h:50 fs/file.c:1145) 
[ 1258.690435][ T8198] __sys_sendmsg (./include/linux/file.h:34 net/socket.c:2682) 
[ 1258.690742][ T8198] ? __pfx___sys_sendmsg (net/socket.c:2668) 
[ 1258.691028][ T8198] ? __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) 
[ 1258.691223][ T8198] do_syscall_64 (arch/x86/entry/common.c:52 arch/x86/entry/common.c:83) 
[ 1258.691630][ T8198] entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:130) 
[ 1258.691854][ T8198] RIP: 0033:0x7f39a3b1f7b7
[ 1258.692260][ T8198] 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)
[ 1258.692992][ T8198] RSP: 002b:00007ffff3f8b2d8 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
[ 1258.693474][ T8198] RAX: ffffffffffffffda RBX: 00007ffff3f8ba00 RCX: 00007f39a3b1f7b7
[ 1258.693880][ T8198] RDX: 0000000000000000 RSI: 00007ffff3f8b340 RDI: 0000000000000005
[ 1258.694252][ T8198] RBP: 0000000000000003 R08: 0000000000000003 R09: 0000000000000000
[ 1258.694652][ T8198] R10: 000000001dbff910 R11: 0000000000000246 R12: 0000000000000003
[ 1258.695142][ T8198] R13: 0000000066beb00f R14: 0000000000496600 R15: 0000000000000000
| [ 1258.698766][ T8198] #0: ffffffff901dcac8 (rtnl_mutex){+.+.}-{3:3}, at: rtnetlink_rcv_msg (net/core/rtnetlink.c:6645) 
| [ 1258.699315][ T8198] #1: ffff88800a612c58 (&br->lock){+...}-{2:2}, at: br_add_if (net/bridge/br_if.c:683) 
| [ 1258.699632][ T8198]
| [ 1258.699632][ T8198] stack backtrace:
[ 1258.700353][ T8198] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[ 1258.700838][ T8198] Call Trace:
[ 1258.701072][ T8198]  <TASK>
[ 1258.701166][ T8198] dump_stack_lvl (lib/dump_stack.c:122) 
[ 1258.701444][ T8198] lockdep_rcu_suspicious (./include/linux/context_tracking.h:153 kernel/locking/lockdep.c:6725) 
[ 1258.701621][ T8198] ? __pfx_br_handle_frame (net/bridge/br_input.c:326) 
[ 1258.701923][ T8198] br_get_link_af_size_filtered (net/bridge/br_private.h:1611 net/bridge/br_private.h:1608 net/bridge/br_netlink.c:107) 
[ 1258.702249][ T8198] ? __timer_delete (./include/linux/list.h:971 ./include/linux/timer.h:147 kernel/time/timer.c:1426) 
[ 1258.702423][ T8198] ? __timer_delete (./include/linux/list.h:971 ./include/linux/timer.h:147 kernel/time/timer.c:1426) 
[ 1258.702605][ T8198] br_info_notify (./include/linux/skbuff.h:1320 ./include/net/netlink.h:1015 net/bridge/br_netlink.c:645) 
[ 1258.702785][ T8198] br_make_forwarding (net/bridge/br_stp.c:465) 
[ 1258.702962][ T8198] br_port_state_selection (net/bridge/br_stp.c:495) 
[ 1258.703147][ T8198] br_stp_enable_port (net/bridge/br_stp_if.c:95) 
[ 1258.703328][ T8198] br_add_if (net/bridge/br_if.c:687) 
[ 1258.703466][ T8198] ? rtnl_is_locked (net/core/rtnetlink.c:164) 
[ 1258.703641][ T8198] ? netdev_master_upper_dev_get (net/core/dev.c:7102) 
[ 1258.703869][ T8198] do_setlink (net/core/rtnetlink.c:2907) 
[ 1258.704044][ T8198] ? is_bpf_text_address (./include/linux/rcupdate.h:336 ./include/linux/rcupdate.h:869 ./kernel/bpf/core.c:769) 
[ 1258.704327][ T8198] ? __pfx_do_setlink (net/core/rtnetlink.c:2778) 
[ 1258.704501][ T8198] ? is_bpf_text_address (./kernel/bpf/core.c:772) 
[ 1258.704676][ T8198] ? kernel_text_address (kernel/extable.c:97 kernel/extable.c:94) 
[ 1258.704859][ T8198] ? __kernel_text_address (kernel/extable.c:79) 
[ 1258.705059][ T8198] ? unwind_get_return_address (arch/x86/kernel/unwind_orc.c:369 arch/x86/kernel/unwind_orc.c:364) 
[ 1258.705232][ T8198] ? __pfx_stack_trace_consume_entry (kernel/stacktrace.c:83) 
[ 1258.705451][ T8198] ? arch_stack_walk (arch/x86/kernel/stacktrace.c:26) 
[ 1258.705634][ T8198] ? stack_trace_save (kernel/stacktrace.c:123) 
[ 1258.705831][ T8198] ? __pfx_stack_trace_save (kernel/stacktrace.c:114) 
[ 1258.706006][ T8198] ? __pfx_validate_nla (lib/nlattr.c:396) 
[ 1258.706183][ T8198] ? mark_lock (kernel/locking/lockdep.c:4655 (discriminator 3)) 
[ 1258.706319][ T8198] ? kasan_save_stack (mm/kasan/common.c:49) 
[ 1258.706507][ T8198] ? __nla_validate_parse (lib/nlattr.c:638) 
[ 1258.706795][ T8198] __rtnl_newlink (net/core/rtnetlink.c:3696) 
[ 1258.707087][ T8198] ? 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) 
[ 1258.707264][ T8198] ? __pfx___rtnl_newlink (net/core/rtnetlink.c:3557) 
[ 1258.707447][ T8198] ? lockdep_hardirqs_on_prepare (kernel/locking/lockdep.c:4299 kernel/locking/lockdep.c:4358) 
[ 1258.707756][ T8198] ? __create_object (mm/kmemleak.c:751) 
[ 1258.707931][ T8198] ? trace_kmalloc (./include/trace/events/kmem.h:54 (discriminator 52)) 
[ 1258.708111][ T8198] rtnl_newlink (net/core/rtnetlink.c:3744) 
[ 1258.708246][ T8198] rtnetlink_rcv_msg (net/core/rtnetlink.c:6647) 
[ 1258.708517][ T8198] ? __pfx_rtnetlink_rcv_msg (net/core/rtnetlink.c:6541) 
[ 1258.708692][ T8198] ? 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) 
[ 1258.708869][ T8198] ? mark_lock (kernel/locking/lockdep.c:4655 (discriminator 3)) 
[ 1258.709013][ T8198] ? __lock_acquire (kernel/locking/lockdep.c:5142) 
[ 1258.709189][ T8198] netlink_rcv_skb (net/netlink/af_netlink.c:2550) 
[ 1258.709457][ T8198] ? __pfx_rtnetlink_rcv_msg (net/core/rtnetlink.c:6541) 
[ 1258.709634][ T8198] ? __pfx_netlink_rcv_skb (net/netlink/af_netlink.c:2527) 
[ 1258.709849][ T8198] ? netlink_deliver_tap (./include/linux/rcupdate.h:336 ./include/linux/rcupdate.h:869 net/netlink/af_netlink.c:340) 
[ 1258.710024][ T8198] ? 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) 
[ 1258.710309][ T8198] netlink_unicast (net/netlink/af_netlink.c:1331 net/netlink/af_netlink.c:1357) 
[ 1258.710489][ T8198] ? __pfx_netlink_unicast (net/netlink/af_netlink.c:1342) 
[ 1258.710666][ T8198] ? find_held_lock (kernel/locking/lockdep.c:5249) 
[ 1258.710849][ T8198] netlink_sendmsg (net/netlink/af_netlink.c:1901) 
[ 1258.711035][ T8198] ? __pfx_netlink_sendmsg (net/netlink/af_netlink.c:1820) 
[ 1258.711221][ T8198] ? __might_fault (mm/memory.c:6388 mm/memory.c:6381) 
[ 1258.711399][ T8198] ? __import_iovec (lib/iov_iter.c:1263 lib/iov_iter.c:1279) 
[ 1258.711584][ T8198] ____sys_sendmsg (net/socket.c:730 net/socket.c:745 net/socket.c:2597) 
[ 1258.711763][ T8198] ? __pfx_____sys_sendmsg (net/socket.c:2543) 
[ 1258.711937][ T8198] ? __pfx_copy_msghdr_from_user (net/socket.c:2523) 
[ 1258.712151][ T8198] ? __pfx_validate_chain (kernel/locking/lockdep.c:3824) 
[ 1258.712337][ T8198] ___sys_sendmsg (net/socket.c:2653) 
[ 1258.712516][ T8198] ? __pfx____sys_sendmsg (net/socket.c:2640) 
[ 1258.712794][ T8198] ? find_held_lock (kernel/locking/lockdep.c:5249) 
[ 1258.713081][ T8198] ? __lock_release (kernel/locking/lockdep.c:5435) 
[ 1258.713258][ T8198] ? __debug_check_no_obj_freed (lib/debugobjects.c:1001) 
[ 1258.713484][ T8198] ? __pfx___lock_release (kernel/locking/lockdep.c:5411) 
[ 1258.713790][ T8198] ? __pfx_do_raw_spin_lock (kernel/locking/spinlock_debug.c:114) 
[ 1258.713978][ T8198] ? lockdep_hardirqs_on_prepare (kernel/locking/lockdep.c:4299 kernel/locking/lockdep.c:4358) 
[ 1258.714314][ T8198] ? __fget_light (./include/linux/atomic/atomic-arch-fallback.h:479 ./include/linux/atomic/atomic-instrumented.h:50 fs/file.c:1145) 
[ 1258.714501][ T8198] __sys_sendmsg (./include/linux/file.h:34 net/socket.c:2682) 
[ 1258.714680][ T8198] ? __pfx___sys_sendmsg (net/socket.c:2668) 
[ 1258.714967][ T8198] ? __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) 
[ 1258.715165][ T8198] do_syscall_64 (arch/x86/entry/common.c:52 arch/x86/entry/common.c:83) 
[ 1258.715340][ T8198] entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:130) 
[ 1258.715554][ T8198] RIP: 0033:0x7f39a3b1f7b7
[ 1258.715733][ T8198] 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)
[ 1258.716478][ T8198] RSP: 002b:00007ffff3f8b2d8 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
[ 1258.716743][ T8198] RAX: ffffffffffffffda RBX: 00007ffff3f8ba00 RCX: 00007f39a3b1f7b7
[ 1258.717006][ T8198] RDX: 0000000000000000 RSI: 00007ffff3f8b340 RDI: 0000000000000005
[ 1258.717263][ T8198] RBP: 0000000000000003 R08: 0000000000000003 R09: 0000000000000000
[ 1258.717525][ T8198] R10: 000000001dbff910 R11: 0000000000000246 R12: 0000000000000003


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