======================================
| [ 33.834699][ T320] #0: ffffffffbadbc508 (rtnl_mutex){+.+.}-{3:3}, at: rtnetlink_rcv_msg (net/core/rtnetlink.c:6645) 
| [ 33.835036][ T320] #1: ffff88800597ac58 (&br->lock){+...}-{2:2}, at: br_add_if (net/bridge/br_if.c:683) bridge
| [   33.835446][  T320]
| [   33.835446][  T320] stack backtrace:
[   33.836020][  T320] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[   33.836431][  T320] Call Trace:
[   33.836580][  T320]  <TASK>
[ 33.836680][ T320] dump_stack_lvl (lib/dump_stack.c:122) 
[ 33.836872][ T320] lockdep_rcu_suspicious (./include/linux/context_tracking.h:153 kernel/locking/lockdep.c:6725) 
[ 33.837065][ T320] ? __pfx_br_handle_frame (net/bridge/br_input.c:326) bridge
[ 33.837337][ T320] 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
[ 33.837600][ T320] ? __timer_delete (./include/linux/list.h:971 ./include/linux/timer.h:147 kernel/time/timer.c:1426) 
[ 33.837783][ T320] ? __timer_delete (./include/linux/list.h:971 ./include/linux/timer.h:147 kernel/time/timer.c:1426) 
[ 33.837976][ T320] br_info_notify (./include/linux/skbuff.h:1320 ./include/net/netlink.h:1015 net/bridge/br_netlink.c:645) bridge
[ 33.838191][ T320] ? mn_hlist_invalidate_range_start (mm/mmu_notifier.c:485 (discriminator 4)) 
[ 33.838425][ T320] br_make_forwarding (net/bridge/br_stp.c:465) bridge
[ 33.838642][ T320] br_port_state_selection (net/bridge/br_stp.c:495) bridge
[ 33.838913][ T320] br_stp_enable_port (net/bridge/br_stp_if.c:95) bridge
[ 33.839158][ T320] br_add_if (net/bridge/br_if.c:687) bridge
[ 33.839394][ T320] do_setlink (net/core/rtnetlink.c:2907) 
[ 33.839592][ T320] ? is_bpf_text_address (./include/linux/rcupdate.h:336 ./include/linux/rcupdate.h:869 ./kernel/bpf/core.c:769) 
[ 33.839796][ T320] ? __pfx_do_setlink (net/core/rtnetlink.c:2778) 
[ 33.840019][ T320] ? is_bpf_text_address (./kernel/bpf/core.c:772) 
[ 33.840213][ T320] ? kernel_text_address (kernel/extable.c:97 kernel/extable.c:94) 
[ 33.840410][ T320] ? __kernel_text_address (kernel/extable.c:79) 
[ 33.840648][ T320] ? unwind_get_return_address (arch/x86/kernel/unwind_orc.c:369 arch/x86/kernel/unwind_orc.c:364) 
[ 33.840849][ T320] ? __pfx_stack_trace_consume_entry (kernel/stacktrace.c:83) 
[ 33.841088][ T320] ? arch_stack_walk (arch/x86/kernel/stacktrace.c:26) 
[ 33.841283][ T320] ? stack_trace_save (kernel/stacktrace.c:123) 
[ 33.841466][ T320] ? __pfx_stack_trace_save (kernel/stacktrace.c:114) 
[ 33.841650][ T320] ? __pfx_validate_nla (lib/nlattr.c:396) 
[ 33.841836][ T320] ? mark_lock (kernel/locking/lockdep.c:4655 (discriminator 3)) 
[ 33.841979][ T320] ? kasan_save_stack (mm/kasan/common.c:49) 
[ 33.842176][ T320] ? __nla_validate_parse (lib/nlattr.c:638) 
[ 33.842373][ T320] __rtnl_newlink (net/core/rtnetlink.c:3696) 
[ 33.842570][ T320] ? 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) 
[ 33.842756][ T320] ? __pfx___rtnl_newlink (net/core/rtnetlink.c:3557) 
[ 33.842947][ T320] ? lockdep_hardirqs_on_prepare (kernel/locking/lockdep.c:4299 kernel/locking/lockdep.c:4358) 
[ 33.843187][ T320] ? __create_object (mm/kmemleak.c:751) 
[ 33.843374][ T320] ? trace_kmalloc (./include/trace/events/kmem.h:54 (discriminator 52)) 
[ 33.843564][ T320] rtnl_newlink (net/core/rtnetlink.c:3744) 
[ 33.843718][ T320] rtnetlink_rcv_msg (net/core/rtnetlink.c:6647) 
[ 33.843943][ T320] ? __pfx_rtnetlink_rcv_msg (net/core/rtnetlink.c:6541) 
[ 33.844129][ T320] ? 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) 
[ 33.844329][ T320] ? mark_lock (kernel/locking/lockdep.c:4655 (discriminator 3)) 
[ 33.844475][ T320] ? __lock_acquire (kernel/locking/lockdep.c:5142) 
[ 33.844661][ T320] netlink_rcv_skb (net/netlink/af_netlink.c:2550) 
[ 33.844858][ T320] ? __pfx_rtnetlink_rcv_msg (net/core/rtnetlink.c:6541) 
[ 33.845060][ T320] ? __pfx_netlink_rcv_skb (net/netlink/af_netlink.c:2527) 
[ 33.845263][ T320] ? netlink_deliver_tap (./include/linux/rcupdate.h:336 ./include/linux/rcupdate.h:869 net/netlink/af_netlink.c:340) 
[ 33.845453][ T320] ? 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) 
[ 33.845666][ T320] netlink_unicast (net/netlink/af_netlink.c:1331 net/netlink/af_netlink.c:1357) 
[ 33.845865][ T320] ? __pfx_netlink_unicast (net/netlink/af_netlink.c:1342) 
[ 33.846057][ T320] ? find_held_lock (kernel/locking/lockdep.c:5249) 
[ 33.846248][ T320] netlink_sendmsg (net/netlink/af_netlink.c:1901) 
[ 33.846436][ T320] ? __pfx_netlink_sendmsg (net/netlink/af_netlink.c:1820) 
[ 33.846621][ T320] ? __might_fault (mm/memory.c:6388 mm/memory.c:6381) 
[ 33.846816][ T320] ? __import_iovec (lib/iov_iter.c:1263 lib/iov_iter.c:1279) 
[ 33.847022][ T320] ____sys_sendmsg (net/socket.c:730 net/socket.c:745 net/socket.c:2597) 
[ 33.847246][ T320] ? __pfx_____sys_sendmsg (net/socket.c:2543) 
[ 33.847438][ T320] ? __pfx_copy_msghdr_from_user (net/socket.c:2523) 
[ 33.847696][ T320] ? __pfx_validate_chain (kernel/locking/lockdep.c:3824) 
[ 33.847899][ T320] ___sys_sendmsg (net/socket.c:2653) 
[ 33.848089][ T320] ? __pfx____sys_sendmsg (net/socket.c:2640) 
[ 33.848279][ T320] ? find_held_lock (kernel/locking/lockdep.c:5249) 
[ 33.848468][ T320] ? __lock_release (kernel/locking/lockdep.c:5435) 
[ 33.848671][ T320] ? __debug_check_no_obj_freed (lib/debugobjects.c:1001) 
[ 33.848905][ T320] ? __pfx___lock_release (kernel/locking/lockdep.c:5411) 
[ 33.849094][ T320] ? __pfx_do_raw_spin_lock (kernel/locking/spinlock_debug.c:114) 
[ 33.849294][ T320] ? lockdep_hardirqs_on_prepare (kernel/locking/lockdep.c:4299 kernel/locking/lockdep.c:4358) 
[ 33.849521][ T320] ? __fget_light (./include/linux/atomic/atomic-arch-fallback.h:479 ./include/linux/atomic/atomic-instrumented.h:50 fs/file.c:1145) 
[ 33.849723][ T320] __sys_sendmsg (./include/linux/file.h:34 net/socket.c:2682) 
[ 33.849905][ T320] ? __pfx___sys_sendmsg (net/socket.c:2668) 
[ 33.850089][ T320] ? __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) 
[ 33.850306][ T320] do_syscall_64 (arch/x86/entry/common.c:52 arch/x86/entry/common.c:83) 
[ 33.850494][ T320] entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:130) 
[   33.850727][  T320] RIP: 0033:0x7fc9f0c407b7
[ 33.850916][ T320] 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)
[   33.851538][  T320] RSP: 002b:00007ffdef9da798 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
[   33.851812][  T320] RAX: ffffffffffffffda RBX: 00007ffdef9daec0 RCX: 00007fc9f0c407b7
[   33.852085][  T320] RDX: 0000000000000000 RSI: 00007ffdef9da800 RDI: 0000000000000005
[   33.852379][  T320] RBP: 0000000000000004 R08: 0000000000000003 R09: 0000000000000000
[   33.852657][  T320] R10: 00000000332e7910 R11: 0000000000000246 R12: 0000000000000004
[   33.852972][  T320] R13: 0000000066bea09f R14: 0000000000496600 R15: 0000000000000000
| [ 33.855308][ T320] #0: ffffffffbadbc508 (rtnl_mutex){+.+.}-{3:3}, at: rtnetlink_rcv_msg (net/core/rtnetlink.c:6645) 
| [ 33.855653][ T320] #1: ffff88800597ac58 (&br->lock){+...}-{2:2}, at: br_add_if (net/bridge/br_if.c:683) bridge
| [   33.856009][  T320]
| [   33.856009][  T320] stack backtrace:
[   33.856524][  T320] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[   33.856936][  T320] Call Trace:
[   33.857075][  T320]  <TASK>
[ 33.857223][ T320] dump_stack_lvl (lib/dump_stack.c:122) 
[ 33.857416][ T320] lockdep_rcu_suspicious (./include/linux/context_tracking.h:153 kernel/locking/lockdep.c:6725) 
[ 33.857612][ T320] ? __pfx_br_handle_frame (net/bridge/br_input.c:326) bridge
[ 33.857874][ T320] 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
[ 33.858131][ T320] ? __timer_delete (./include/linux/list.h:971 ./include/linux/timer.h:147 kernel/time/timer.c:1426) 
[ 33.858329][ T320] ? __timer_delete (./include/linux/list.h:971 ./include/linux/timer.h:147 kernel/time/timer.c:1426) 
[ 33.858516][ T320] br_info_notify (./include/linux/skbuff.h:1320 ./include/net/netlink.h:1015 net/bridge/br_netlink.c:645) bridge
[ 33.858732][ T320] ? mn_hlist_invalidate_range_start (mm/mmu_notifier.c:485 (discriminator 4)) 
[ 33.858969][ T320] br_make_forwarding (net/bridge/br_stp.c:465) bridge
[ 33.859190][ T320] br_port_state_selection (net/bridge/br_stp.c:495) bridge
[ 33.859461][ T320] br_stp_enable_port (net/bridge/br_stp_if.c:95) bridge
[ 33.859674][ T320] br_add_if (net/bridge/br_if.c:687) bridge
[ 33.859910][ T320] do_setlink (net/core/rtnetlink.c:2907) 
[ 33.860097][ T320] ? is_bpf_text_address (./include/linux/rcupdate.h:336 ./include/linux/rcupdate.h:869 ./kernel/bpf/core.c:769) 
[ 33.860291][ T320] ? __pfx_do_setlink (net/core/rtnetlink.c:2778) 
[ 33.860486][ T320] ? is_bpf_text_address (./kernel/bpf/core.c:772) 
[ 33.860671][ T320] ? kernel_text_address (kernel/extable.c:97 kernel/extable.c:94) 
[ 33.860862][ T320] ? __kernel_text_address (kernel/extable.c:79) 
[ 33.861080][ T320] ? unwind_get_return_address (arch/x86/kernel/unwind_orc.c:369 arch/x86/kernel/unwind_orc.c:364) 
[ 33.861261][ T320] ? __pfx_stack_trace_consume_entry (kernel/stacktrace.c:83) 
[ 33.861496][ T320] ? arch_stack_walk (arch/x86/kernel/stacktrace.c:26) 
[ 33.861718][ T320] ? stack_trace_save (kernel/stacktrace.c:123) 
[ 33.861927][ T320] ? __pfx_stack_trace_save (kernel/stacktrace.c:114) 
[ 33.862109][ T320] ? __pfx_validate_nla (lib/nlattr.c:396) 
[ 33.862296][ T320] ? mark_lock (kernel/locking/lockdep.c:4655 (discriminator 3)) 
[ 33.862600][ T320] ? kasan_save_stack (mm/kasan/common.c:49) 
[ 33.862791][ T320] ? __nla_validate_parse (lib/nlattr.c:638) 
[ 33.862979][ T320] __rtnl_newlink (net/core/rtnetlink.c:3696) 
[ 33.863174][ T320] ? 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) 
[ 33.863468][ T320] ? __pfx___rtnl_newlink (net/core/rtnetlink.c:3557) 
[ 33.863655][ T320] ? lockdep_hardirqs_on_prepare (kernel/locking/lockdep.c:4299 kernel/locking/lockdep.c:4358) 
[ 33.863892][ T320] ? __create_object (mm/kmemleak.c:751) 
[ 33.864077][ T320] ? trace_kmalloc (./include/trace/events/kmem.h:54 (discriminator 52)) 
[ 33.864395][ T320] rtnl_newlink (net/core/rtnetlink.c:3744) 
[ 33.864535][ T320] rtnetlink_rcv_msg (net/core/rtnetlink.c:6647) 
[ 33.864722][ T320] ? __pfx_rtnetlink_rcv_msg (net/core/rtnetlink.c:6541) 
[ 33.864935][ T320] ? 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) 
[ 33.865154][ T320] ? mark_lock (kernel/locking/lockdep.c:4655 (discriminator 3)) 
[ 33.865299][ T320] ? __lock_acquire (kernel/locking/lockdep.c:5142) 
[ 33.865488][ T320] netlink_rcv_skb (net/netlink/af_netlink.c:2550) 
[ 33.865687][ T320] ? __pfx_rtnetlink_rcv_msg (net/core/rtnetlink.c:6541) 
[ 33.865873][ T320] ? __pfx_netlink_rcv_skb (net/netlink/af_netlink.c:2527) 
[ 33.866075][ T320] ? netlink_deliver_tap (./include/linux/rcupdate.h:336 ./include/linux/rcupdate.h:869 net/netlink/af_netlink.c:340) 
[ 33.866258][ T320] ? 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) 
[ 33.866452][ T320] netlink_unicast (net/netlink/af_netlink.c:1331 net/netlink/af_netlink.c:1357) 
[ 33.866648][ T320] ? __pfx_netlink_unicast (net/netlink/af_netlink.c:1342) 
[ 33.866835][ T320] ? find_held_lock (kernel/locking/lockdep.c:5249) 
[ 33.867026][ T320] netlink_sendmsg (net/netlink/af_netlink.c:1901) 
[ 33.867214][ T320] ? __pfx_netlink_sendmsg (net/netlink/af_netlink.c:1820) 
[ 33.867405][ T320] ? __might_fault (mm/memory.c:6388 mm/memory.c:6381) 
[ 33.867605][ T320] ? __import_iovec (lib/iov_iter.c:1263 lib/iov_iter.c:1279) 
[ 33.868022][ T320] ____sys_sendmsg (net/socket.c:730 net/socket.c:745 net/socket.c:2597) 
[ 33.868209][ T320] ? __pfx_____sys_sendmsg (net/socket.c:2543) 
[ 33.868437][ T320] ? __pfx_copy_msghdr_from_user (net/socket.c:2523) 
[ 33.868683][ T320] ? __pfx_validate_chain (kernel/locking/lockdep.c:3824) 
[ 33.868989][ T320] ___sys_sendmsg (net/socket.c:2653) 
[ 33.869174][ T320] ? __pfx____sys_sendmsg (net/socket.c:2640) 
[ 33.869361][ T320] ? find_held_lock (kernel/locking/lockdep.c:5249) 
[ 33.869553][ T320] ? __lock_release (kernel/locking/lockdep.c:5435) 
[ 33.869875][ T320] ? __debug_check_no_obj_freed (lib/debugobjects.c:1001) 
[ 33.870116][ T320] ? __pfx___lock_release (kernel/locking/lockdep.c:5411) 
[ 33.870308][ T320] ? __pfx_do_raw_spin_lock (kernel/locking/spinlock_debug.c:114) 
[ 33.870501][ T320] ? lockdep_hardirqs_on_prepare (kernel/locking/lockdep.c:4299 kernel/locking/lockdep.c:4358) 
[ 33.870842][ T320] ? __fget_light (./include/linux/atomic/atomic-arch-fallback.h:479 ./include/linux/atomic/atomic-instrumented.h:50 fs/file.c:1145) 
[ 33.871037][ T320] __sys_sendmsg (./include/linux/file.h:34 net/socket.c:2682) 
[ 33.871223][ T320] ? __pfx___sys_sendmsg (net/socket.c:2668) 
[ 33.871407][ T320] ? __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) 
[ 33.871726][ T320] do_syscall_64 (arch/x86/entry/common.c:52 arch/x86/entry/common.c:83) 
[ 33.871923][ T320] entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:130) 
[   33.872158][  T320] RIP: 0033:0x7fc9f0c407b7
[ 33.872347][ T320] 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)
[   33.873131][  T320] RSP: 002b:00007ffdef9da798 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
[   33.873521][  T320] RAX: ffffffffffffffda RBX: 00007ffdef9daec0 RCX: 00007fc9f0c407b7
[   33.873830][  T320] RDX: 0000000000000000 RSI: 00007ffdef9da800 RDI: 0000000000000005
[   33.874103][  T320] RBP: 0000000000000004 R08: 0000000000000003 R09: 0000000000000000
[   33.874483][  T320] R10: 00000000332e7910 R11: 0000000000000246 R12: 0000000000000004
[   33.874757][  T320] R13: 0000000066bea09f R14: 0000000000496600 R15: 0000000000000000
| [ 33.877266][ T320] #0: ffffffffbadbc508 (rtnl_mutex){+.+.}-{3:3}, at: rtnetlink_rcv_msg (net/core/rtnetlink.c:6645) 
| [ 33.877596][ T320] #1: ffff88800597ac58 (&br->lock){+...}-{2:2}, at: br_add_if (net/bridge/br_if.c:683) bridge
| [   33.877955][  T320]
| [   33.877955][  T320] stack backtrace:
[   33.878527][  T320] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[   33.879053][  T320] Call Trace:
[   33.879197][  T320]  <TASK>
[ 33.879296][ T320] dump_stack_lvl (lib/dump_stack.c:122) 
[ 33.879487][ T320] lockdep_rcu_suspicious (./include/linux/context_tracking.h:153 kernel/locking/lockdep.c:6725) 
[ 33.879788][ T320] ? __pfx_br_handle_frame (net/bridge/br_input.c:326) bridge
[ 33.880061][ T320] 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
[ 33.880319][ T320] ? __timer_delete (./include/linux/list.h:971 ./include/linux/timer.h:147 kernel/time/timer.c:1426) 
[ 33.880500][ T320] ? __timer_delete (./include/linux/list.h:971 ./include/linux/timer.h:147 kernel/time/timer.c:1426) 
[ 33.880805][ T320] br_info_notify (./include/linux/skbuff.h:1320 ./include/net/netlink.h:1015 net/bridge/br_netlink.c:645) bridge
[ 33.881021][ T320] ? mn_hlist_invalidate_range_start (mm/mmu_notifier.c:485 (discriminator 4)) 
[ 33.881258][ T320] br_make_forwarding (net/bridge/br_stp.c:465) bridge
[ 33.881479][ T320] br_port_state_selection (net/bridge/br_stp.c:495) bridge
[ 33.881856][ T320] br_stp_enable_port (net/bridge/br_stp_if.c:95) bridge
[ 33.882093][ T320] br_add_if (net/bridge/br_if.c:687) bridge
[ 33.882327][ T320] do_setlink (net/core/rtnetlink.c:2907) 
[ 33.882514][ T320] ? is_bpf_text_address (./include/linux/rcupdate.h:336 ./include/linux/rcupdate.h:869 ./kernel/bpf/core.c:769) 
[ 33.882971][ T320] ? __pfx_do_setlink (net/core/rtnetlink.c:2778) 
[ 33.883158][ T320] ? is_bpf_text_address (./kernel/bpf/core.c:772) 
[ 33.883350][ T320] ? kernel_text_address (kernel/extable.c:97 kernel/extable.c:94) 
[ 33.883544][ T320] ? __kernel_text_address (kernel/extable.c:79) 
[ 33.883839][ T320] ? unwind_get_return_address (arch/x86/kernel/unwind_orc.c:369 arch/x86/kernel/unwind_orc.c:364) 
[ 33.884022][ T320] ? __pfx_stack_trace_consume_entry (kernel/stacktrace.c:83) 
[ 33.884255][ T320] ? arch_stack_walk (arch/x86/kernel/stacktrace.c:26) 
[ 33.884453][ T320] ? stack_trace_save (kernel/stacktrace.c:123) 
[ 33.884747][ T320] ? __pfx_stack_trace_save (kernel/stacktrace.c:114) 
[ 33.884931][ T320] ? __pfx_validate_nla (lib/nlattr.c:396) 
[ 33.885116][ T320] ? mark_lock (kernel/locking/lockdep.c:4655 (discriminator 3)) 
[ 33.885265][ T320] ? kasan_save_stack (mm/kasan/common.c:49) 
[ 33.885573][ T320] ? __nla_validate_parse (lib/nlattr.c:638) 
[ 33.885767][ T320] __rtnl_newlink (net/core/rtnetlink.c:3696) 
[ 33.886005][ T320] ? 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) 
[ 33.886326][ T320] ? __pfx___rtnl_newlink (net/core/rtnetlink.c:3557) 
[ 33.886653][ T320] ? lockdep_hardirqs_on_prepare (kernel/locking/lockdep.c:4299 kernel/locking/lockdep.c:4358) 
[ 33.887261][ T320] ? __create_object (mm/kmemleak.c:751) 
[ 33.887586][ T320] ? trace_kmalloc (./include/trace/events/kmem.h:54 (discriminator 52)) 
[ 33.887909][ T320] rtnl_newlink (net/core/rtnetlink.c:3744) 
[ 33.888059][ T320] rtnetlink_rcv_msg (net/core/rtnetlink.c:6647) 
[ 33.888364][ T320] ? __pfx_rtnetlink_rcv_msg (net/core/rtnetlink.c:6541) 
[ 33.888548][ T320] ? 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) 
[ 33.888729][ T320] ? mark_lock (kernel/locking/lockdep.c:4655 (discriminator 3)) 
[ 33.888876][ T320] ? __lock_acquire (kernel/locking/lockdep.c:5142) 
[ 33.889075][ T320] netlink_rcv_skb (net/netlink/af_netlink.c:2550) 
[ 33.889267][ T320] ? __pfx_rtnetlink_rcv_msg (net/core/rtnetlink.c:6541) 
[ 33.889481][ T320] ? __pfx_netlink_rcv_skb (net/netlink/af_netlink.c:2527) 
[ 33.889717][ T320] ? netlink_deliver_tap (./include/linux/rcupdate.h:336 ./include/linux/rcupdate.h:869 net/netlink/af_netlink.c:340) 
[ 33.889903][ T320] ? 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) 
[ 33.890088][ T320] netlink_unicast (net/netlink/af_netlink.c:1331 net/netlink/af_netlink.c:1357) 
[ 33.890277][ T320] ? __pfx_netlink_unicast (net/netlink/af_netlink.c:1342) 
[ 33.890461][ T320] ? find_held_lock (kernel/locking/lockdep.c:5249) 
[ 33.890651][ T320] netlink_sendmsg (net/netlink/af_netlink.c:1901) 
[ 33.890841][ T320] ? __pfx_netlink_sendmsg (net/netlink/af_netlink.c:1820) 
[ 33.891024][ T320] ? __might_fault (mm/memory.c:6388 mm/memory.c:6381) 
[ 33.891215][ T320] ? __import_iovec (lib/iov_iter.c:1263 lib/iov_iter.c:1279) 
[ 33.891405][ T320] ____sys_sendmsg (net/socket.c:730 net/socket.c:745 net/socket.c:2597) 
[ 33.891702][ T320] ? __pfx_____sys_sendmsg (net/socket.c:2543) 
[ 33.891885][ T320] ? __pfx_copy_msghdr_from_user (net/socket.c:2523) 
[ 33.892112][ T320] ? __pfx_validate_chain (kernel/locking/lockdep.c:3824) 
[ 33.892307][ T320] ___sys_sendmsg (net/socket.c:2653) 
[ 33.892602][ T320] ? __pfx____sys_sendmsg (net/socket.c:2640) 
[ 33.892788][ T320] ? find_held_lock (kernel/locking/lockdep.c:5249) 
[ 33.892979][ T320] ? __lock_release (kernel/locking/lockdep.c:5435) 
[ 33.893171][ T320] ? __debug_check_no_obj_freed (lib/debugobjects.c:1001) 
[ 33.893507][ T320] ? __pfx___lock_release (kernel/locking/lockdep.c:5411) 
[ 33.893715][ T320] ? __pfx_do_raw_spin_lock (kernel/locking/spinlock_debug.c:114) 
[ 33.893910][ T320] ? lockdep_hardirqs_on_prepare (kernel/locking/lockdep.c:4299 kernel/locking/lockdep.c:4358) 
[ 33.894141][ T320] ? __fget_light (./include/linux/atomic/atomic-arch-fallback.h:479 ./include/linux/atomic/atomic-instrumented.h:50 fs/file.c:1145) 
[ 33.894449][ T320] __sys_sendmsg (./include/linux/file.h:34 net/socket.c:2682) 
[ 33.894633][ T320] ? __pfx___sys_sendmsg (net/socket.c:2668) 
[ 33.894824][ T320] ? __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) 
[ 33.895029][ T320] do_syscall_64 (arch/x86/entry/common.c:52 arch/x86/entry/common.c:83) 
[ 33.895224][ T320] entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:130) 
[   33.895452][  T320] RIP: 0033:0x7fc9f0c407b7
[ 33.895650][ T320] 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)
[   33.896285][  T320] RSP: 002b:00007ffdef9da798 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
[   33.896561][  T320] RAX: ffffffffffffffda RBX: 00007ffdef9daec0 RCX: 00007fc9f0c407b7
[   33.896832][  T320] RDX: 0000000000000000 RSI: 00007ffdef9da800 RDI: 0000000000000005
[   33.897106][  T320] RBP: 0000000000000004 R08: 0000000000000003 R09: 0000000000000000
[   33.897377][  T320] R10: 00000000332e7910 R11: 0000000000000246 R12: 0000000000000004
[   33.897913][  T320] R13: 0000000066bea09f R14: 0000000000496600 R15: 0000000000000000
| [   38.759448][  T359] 1 lock held by bridge/359:
| [ 38.759624][ T359] #0: ffffffffbadbc508 (rtnl_mutex){+.+.}-{3:3}, at: rtnetlink_rcv_msg (net/core/rtnetlink.c:6645) 
| [   38.759929][  T359]
| [   38.759929][  T359] stack backtrace:
[   38.760382][  T359] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[   38.760742][  T359] Call Trace:
[   38.760869][  T359]  <TASK>
[ 38.760956][ T359] dump_stack_lvl (lib/dump_stack.c:122) 
[ 38.761127][ T359] lockdep_rcu_suspicious (./include/linux/context_tracking.h:153 kernel/locking/lockdep.c:6725) 
[ 38.761301][ T359] br_get_link_af_size_filtered (net/bridge/br_private.h:1605 net/bridge/br_private.h:1602 net/bridge/br_netlink.c:110) bridge
[ 38.761544][ T359] br_info_notify (./include/linux/skbuff.h:1320 ./include/net/netlink.h:1015 net/bridge/br_netlink.c:645) bridge
[ 38.761855][ T359] br_setlink (net/bridge/br_netlink.c:669 net/bridge/br_netlink.c:1136) bridge
[ 38.762064][ T359] ? __pfx_br_setlink (net/bridge/br_netlink.c:1085) bridge
[ 38.762271][ T359] ? lock_acquire.part.0 (kernel/locking/lockdep.c:466 kernel/locking/lockdep.c:5761) 
[ 38.762446][ T359] ? rtnetlink_rcv_msg (net/core/rtnetlink.c:6645) 
[ 38.762612][ T359] ? 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) 
[ 38.762779][ T359] ? __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) 
[ 38.762951][ T359] ? __pfx___mutex_trylock_common (kernel/locking/mutex.c:104) 
[ 38.763153][ T359] ? rtnetlink_rcv_msg (net/core/rtnetlink.c:6645) 
[ 38.763315][ T359] ? lock_acquire (kernel/locking/lockdep.c:5732) 
[ 38.763488][ T359] ? trace_contention_end (./include/trace/events/lock.h:122 (discriminator 52)) 
[ 38.763652][ T359] ? __mutex_lock (./arch/x86/include/asm/preempt.h:94 kernel/locking/mutex.c:618 kernel/locking/mutex.c:752) 
[ 38.763820][ T359] ? find_held_lock (kernel/locking/lockdep.c:5249) 
[ 38.763986][ T359] ? rtnetlink_rcv_msg (net/core/rtnetlink.c:6645) 
[ 38.764158][ T359] ? __pfx___mutex_lock (kernel/locking/mutex.c:751) 
[ 38.764322][ T359] ? __pfx___lock_release (kernel/locking/lockdep.c:5411) 
[ 38.764492][ T359] ? __pfx_lock_acquire.part.0 (kernel/locking/lockdep.c:5724) 
[ 38.764657][ T359] ? trace_lock_acquire (./include/trace/events/lock.h:24 (discriminator 52)) 
[ 38.764835][ T359] rtnl_bridge_setlink (net/core/rtnetlink.c:5225) 
[ 38.765006][ T359] rtnetlink_rcv_msg (net/core/rtnetlink.c:6647) 
[ 38.765175][ T359] ? __pfx_rtnetlink_rcv_msg (net/core/rtnetlink.c:6541) 
[ 38.765350][ T359] ? 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) 
[ 38.765538][ T359] ? mark_lock (kernel/locking/lockdep.c:4655 (discriminator 3)) 
[ 38.765678][ T359] ? __lock_acquire (kernel/locking/lockdep.c:5142) 
[ 38.765843][ T359] netlink_rcv_skb (net/netlink/af_netlink.c:2550) 
[ 38.766014][ T359] ? __pfx_rtnetlink_rcv_msg (net/core/rtnetlink.c:6541) 
[ 38.766185][ T359] ? __pfx_netlink_rcv_skb (net/netlink/af_netlink.c:2527) 
[ 38.766368][ T359] ? netlink_deliver_tap (./include/linux/rcupdate.h:336 ./include/linux/rcupdate.h:869 net/netlink/af_netlink.c:340) 
[ 38.766550][ T359] ? 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) 
[ 38.766724][ T359] netlink_unicast (net/netlink/af_netlink.c:1331 net/netlink/af_netlink.c:1357) 
[ 38.766904][ T359] ? __pfx_netlink_unicast (net/netlink/af_netlink.c:1342) 
[ 38.767081][ T359] ? find_held_lock (kernel/locking/lockdep.c:5249) 
[ 38.767263][ T359] netlink_sendmsg (net/netlink/af_netlink.c:1901) 
[ 38.767439][ T359] ? __pfx_netlink_sendmsg (net/netlink/af_netlink.c:1820) 
[ 38.767602][ T359] ? __might_fault (mm/memory.c:6388 mm/memory.c:6381) 
[ 38.767783][ T359] ? __import_iovec (lib/iov_iter.c:1263 lib/iov_iter.c:1279) 
[ 38.767956][ T359] ____sys_sendmsg (net/socket.c:730 net/socket.c:745 net/socket.c:2597) 
[ 38.768138][ T359] ? __pfx_____sys_sendmsg (net/socket.c:2543) 
[ 38.768305][ T359] ? __pfx_copy_msghdr_from_user (net/socket.c:2523) 
[ 38.768527][ T359] ___sys_sendmsg (net/socket.c:2653) 
[ 38.768703][ T359] ? __pfx____sys_sendmsg (net/socket.c:2640) 
[ 38.768869][ T359] ? __lock_acquire (kernel/locking/lockdep.c:5142) 
[ 38.769033][ T359] ? usage_skip (kernel/locking/lockdep.c:2294 kernel/locking/lockdep.c:2262) 
[ 38.769210][ T359] ? reacquire_held_locks (kernel/locking/lockdep.c:5284) 
[ 38.769380][ T359] ? do_user_addr_fault (./include/linux/rcupdate.h:326 ./include/linux/rcupdate.h:838 ./include/linux/mm.h:713 arch/x86/mm/fault.c:1340) 
[ 38.769554][ T359] ? __fget_light (./include/linux/atomic/atomic-arch-fallback.h:479 ./include/linux/atomic/atomic-instrumented.h:50 fs/file.c:1145) 
[ 38.769731][ T359] __sys_sendmsg (./include/linux/file.h:34 net/socket.c:2682) 
[ 38.769898][ T359] ? __pfx___sys_sendmsg (net/socket.c:2668) 
[ 38.770066][ T359] ? __pfx___up_read (kernel/locking/rwsem.c:1339) 
[ 38.770250][ T359] do_syscall_64 (arch/x86/entry/common.c:52 arch/x86/entry/common.c:83) 
[ 38.770432][ T359] entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:130) 
[   38.770645][  T359] RIP: 0033:0x7f355eefc7b7
[ 38.770827][ T359] 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)
[   38.771413][  T359] RSP: 002b:00007ffca789e368 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
[   38.771678][  T359] RAX: ffffffffffffffda RBX: 000000000000ffff RCX: 00007f355eefc7b7
[   38.771941][  T359] RDX: 0000000000000000 RSI: 00007ffca789e3d0 RDI: 0000000000000005
[   38.772193][  T359] RBP: 00007ffca789e4c0 R08: 0000000000000034 R09: 0000000000000000
[   38.772443][  T359] R10: 00007f355edb5708 R11: 0000000000000246 R12: 000000000000000a


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