======================================
| [ 34.634383][ T321] #0: ffffffff9b9bc508 (rtnl_mutex){+.+.}-{3:3}, at: rtnetlink_rcv_msg (net/core/rtnetlink.c:6645) 
| [ 34.634736][ T321] #1: ffff8880054bac58 (&br->lock){+...}-{2:2}, at: br_add_if (net/bridge/br_if.c:683) bridge
| [   34.635133][  T321]
| [   34.635133][  T321] stack backtrace:
[   34.635666][  T321] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[   34.636069][  T321] Call Trace:
[   34.636213][  T321]  <TASK>
[ 34.636313][ T321] dump_stack_lvl (lib/dump_stack.c:122) 
[ 34.636502][ T321] lockdep_rcu_suspicious (./include/linux/context_tracking.h:153 kernel/locking/lockdep.c:6725) 
[ 34.636701][ T321] ? __pfx_br_handle_frame (net/bridge/br_input.c:326) bridge
[ 34.636964][ T321] 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
[ 34.637222][ T321] ? __timer_delete (./include/linux/list.h:971 ./include/linux/timer.h:147 kernel/time/timer.c:1426) 
[ 34.637407][ T321] ? __timer_delete (./include/linux/list.h:971 ./include/linux/timer.h:147 kernel/time/timer.c:1426) 
[ 34.637607][ T321] br_info_notify (./include/linux/skbuff.h:1320 ./include/net/netlink.h:1015 net/bridge/br_netlink.c:645) bridge
[ 34.637822][ T321] ? mn_hlist_invalidate_range_start (mm/mmu_notifier.c:485 (discriminator 4)) 
[ 34.638058][ T321] br_make_forwarding (net/bridge/br_stp.c:465) bridge
[ 34.638273][ T321] br_port_state_selection (net/bridge/br_stp.c:495) bridge
[ 34.638539][ T321] br_stp_enable_port (net/bridge/br_stp_if.c:95) bridge
[ 34.638767][ T321] br_add_if (net/bridge/br_if.c:687) bridge
[ 34.639004][ T321] do_setlink (net/core/rtnetlink.c:2907) 
[ 34.639194][ T321] ? is_bpf_text_address (./include/linux/rcupdate.h:336 ./include/linux/rcupdate.h:869 ./kernel/bpf/core.c:769) 
[ 34.639385][ T321] ? __pfx_do_setlink (net/core/rtnetlink.c:2778) 
[ 34.639578][ T321] ? is_bpf_text_address (./kernel/bpf/core.c:772) 
[ 34.639767][ T321] ? kernel_text_address (kernel/extable.c:97 kernel/extable.c:94) 
[ 34.639957][ T321] ? __kernel_text_address (kernel/extable.c:79) 
[ 34.640139][ T321] ? unwind_get_return_address (arch/x86/kernel/unwind_orc.c:369 arch/x86/kernel/unwind_orc.c:364) 
[ 34.640321][ T321] ? __pfx_stack_trace_consume_entry (kernel/stacktrace.c:83) 
[ 34.640643][ T321] ? arch_stack_walk (arch/x86/kernel/stacktrace.c:26) 
[ 34.640928][ T321] ? stack_trace_save (kernel/stacktrace.c:123) 
[ 34.641115][ T321] ? __pfx_stack_trace_save (kernel/stacktrace.c:114) 
[ 34.641296][ T321] ? __pfx_validate_nla (lib/nlattr.c:396) 
[ 34.641480][ T321] ? mark_lock (kernel/locking/lockdep.c:4655 (discriminator 3)) 
[ 34.641626][ T321] ? kasan_save_stack (mm/kasan/common.c:49) 
[ 34.641816][ T321] ? __nla_validate_parse (lib/nlattr.c:638) 
[ 34.642005][ T321] __rtnl_newlink (net/core/rtnetlink.c:3696) 
[ 34.642200][ T321] ? 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) 
[ 34.642389][ T321] ? __pfx___rtnl_newlink (net/core/rtnetlink.c:3557) 
[ 34.642577][ T321] ? lockdep_hardirqs_on_prepare (kernel/locking/lockdep.c:4299 kernel/locking/lockdep.c:4358) 
[ 34.642810][ T321] ? __create_object (mm/kmemleak.c:751) 
[ 34.642997][ T321] ? trace_kmalloc (./include/trace/events/kmem.h:54 (discriminator 52)) 
[ 34.643188][ T321] rtnl_newlink (net/core/rtnetlink.c:3744) 
[ 34.643329][ T321] rtnetlink_rcv_msg (net/core/rtnetlink.c:6647) 
[ 34.643529][ T321] ? __pfx_rtnetlink_rcv_msg (net/core/rtnetlink.c:6541) 
[ 34.643725][ T321] ? 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) 
[ 34.643930][ T321] ? mark_lock (kernel/locking/lockdep.c:4655 (discriminator 3)) 
[ 34.644089][ T321] ? __lock_acquire (kernel/locking/lockdep.c:5142) 
[ 34.644287][ T321] netlink_rcv_skb (net/netlink/af_netlink.c:2550) 
[ 34.644484][ T321] ? __pfx_rtnetlink_rcv_msg (net/core/rtnetlink.c:6541) 
[ 34.644683][ T321] ? __pfx_netlink_rcv_skb (net/netlink/af_netlink.c:2527) 
[ 34.644897][ T321] ? netlink_deliver_tap (./include/linux/rcupdate.h:336 ./include/linux/rcupdate.h:869 net/netlink/af_netlink.c:340) 
[ 34.645098][ T321] ? 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) 
[ 34.645298][ T321] netlink_unicast (net/netlink/af_netlink.c:1331 net/netlink/af_netlink.c:1357) 
[ 34.645503][ T321] ? __pfx_netlink_unicast (net/netlink/af_netlink.c:1342) 
[ 34.645707][ T321] ? find_held_lock (kernel/locking/lockdep.c:5249) 
[ 34.645910][ T321] netlink_sendmsg (net/netlink/af_netlink.c:1901) 
[ 34.646114][ T321] ? __pfx_netlink_sendmsg (net/netlink/af_netlink.c:1820) 
[ 34.646311][ T321] ? __might_fault (mm/memory.c:6388 mm/memory.c:6381) 
[ 34.646510][ T321] ? __import_iovec (lib/iov_iter.c:1263 lib/iov_iter.c:1279) 
[ 34.646717][ T321] ____sys_sendmsg (net/socket.c:730 net/socket.c:745 net/socket.c:2597) 
[ 34.646917][ T321] ? __pfx_____sys_sendmsg (net/socket.c:2543) 
[ 34.647115][ T321] ? __pfx_copy_msghdr_from_user (net/socket.c:2523) 
[ 34.647355][ T321] ? __pfx_validate_chain (kernel/locking/lockdep.c:3824) 
[ 34.647567][ T321] ___sys_sendmsg (net/socket.c:2653) 
[ 34.647764][ T321] ? __pfx____sys_sendmsg (net/socket.c:2640) 
[ 34.647962][ T321] ? find_held_lock (kernel/locking/lockdep.c:5249) 
[ 34.648165][ T321] ? __lock_release (kernel/locking/lockdep.c:5435) 
[ 34.648362][ T321] ? __debug_check_no_obj_freed (lib/debugobjects.c:1001) 
[ 34.648605][ T321] ? __pfx___lock_release (kernel/locking/lockdep.c:5411) 
[ 34.648808][ T321] ? __pfx_do_raw_spin_lock (kernel/locking/spinlock_debug.c:114) 
[ 34.649009][ T321] ? lockdep_hardirqs_on_prepare (kernel/locking/lockdep.c:4299 kernel/locking/lockdep.c:4358) 
[ 34.649255][ T321] ? __fget_light (./include/linux/atomic/atomic-arch-fallback.h:479 ./include/linux/atomic/atomic-instrumented.h:50 fs/file.c:1145) 
[ 34.649462][ T321] __sys_sendmsg (./include/linux/file.h:34 net/socket.c:2682) 
[ 34.649657][ T321] ? __pfx___sys_sendmsg (net/socket.c:2668) 
[ 34.649850][ T321] ? __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) 
[ 34.650072][ T321] do_syscall_64 (arch/x86/entry/common.c:52 arch/x86/entry/common.c:83) 
[ 34.650267][ T321] entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:130) 
[   34.650526][  T321] RIP: 0033:0x7f2ccedbe7b7
[ 34.650725][ T321] 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)
[   34.651387][  T321] RSP: 002b:00007fff6c28fd28 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
[   34.651681][  T321] RAX: ffffffffffffffda RBX: 00007fff6c290450 RCX: 00007f2ccedbe7b7
[   34.651973][  T321] RDX: 0000000000000000 RSI: 00007fff6c28fd90 RDI: 0000000000000005
[   34.652258][  T321] RBP: 0000000000000004 R08: 0000000000000003 R09: 0000000000000000
[   34.652545][  T321] R10: 000000002aaef910 R11: 0000000000000246 R12: 0000000000000004
[   34.652831][  T321] R13: 0000000066bea025 R14: 0000000000496600 R15: 0000000000000000
| [ 34.655308][ T321] #0: ffffffff9b9bc508 (rtnl_mutex){+.+.}-{3:3}, at: rtnetlink_rcv_msg (net/core/rtnetlink.c:6645) 
| [ 34.655662][ T321] #1: ffff8880054bac58 (&br->lock){+...}-{2:2}, at: br_add_if (net/bridge/br_if.c:683) bridge
| [   34.656043][  T321]
| [   34.656043][  T321] stack backtrace:
[   34.656703][  T321] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[   34.657139][  T321] Call Trace:
[   34.657288][  T321]  <TASK>
[ 34.657392][ T321] dump_stack_lvl (lib/dump_stack.c:122) 
[ 34.657595][ T321] lockdep_rcu_suspicious (./include/linux/context_tracking.h:153 kernel/locking/lockdep.c:6725) 
[ 34.657793][ T321] ? __pfx_br_handle_frame (net/bridge/br_input.c:326) bridge
[ 34.658079][ T321] 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
[ 34.658353][ T321] ? __timer_delete (./include/linux/list.h:971 ./include/linux/timer.h:147 kernel/time/timer.c:1426) 
[ 34.658549][ T321] ? __timer_delete (./include/linux/list.h:971 ./include/linux/timer.h:147 kernel/time/timer.c:1426) 
[ 34.658750][ T321] br_info_notify (./include/linux/skbuff.h:1320 ./include/net/netlink.h:1015 net/bridge/br_netlink.c:645) bridge
[ 34.658975][ T321] ? mn_hlist_invalidate_range_start (mm/mmu_notifier.c:485 (discriminator 4)) 
[ 34.659223][ T321] br_make_forwarding (net/bridge/br_stp.c:465) bridge
[ 34.659455][ T321] br_port_state_selection (net/bridge/br_stp.c:495) bridge
[ 34.659739][ T321] br_stp_enable_port (net/bridge/br_stp_if.c:95) bridge
[ 34.659968][ T321] br_add_if (net/bridge/br_if.c:687) bridge
[ 34.660204][ T321] do_setlink (net/core/rtnetlink.c:2907) 
[ 34.660428][ T321] ? is_bpf_text_address (./include/linux/rcupdate.h:336 ./include/linux/rcupdate.h:869 ./kernel/bpf/core.c:769) 
[ 34.660628][ T321] ? __pfx_do_setlink (net/core/rtnetlink.c:2778) 
[ 34.660826][ T321] ? is_bpf_text_address (./kernel/bpf/core.c:772) 
[ 34.661021][ T321] ? kernel_text_address (kernel/extable.c:97 kernel/extable.c:94) 
[ 34.661227][ T321] ? __kernel_text_address (kernel/extable.c:79) 
[ 34.661424][ T321] ? unwind_get_return_address (arch/x86/kernel/unwind_orc.c:369 arch/x86/kernel/unwind_orc.c:364) 
[ 34.661618][ T321] ? __pfx_stack_trace_consume_entry (kernel/stacktrace.c:83) 
[ 34.661860][ T321] ? arch_stack_walk (arch/x86/kernel/stacktrace.c:26) 
[ 34.662069][ T321] ? stack_trace_save (kernel/stacktrace.c:123) 
[ 34.662267][ T321] ? __pfx_stack_trace_save (kernel/stacktrace.c:114) 
[ 34.662466][ T321] ? __pfx_validate_nla (lib/nlattr.c:396) 
[ 34.662664][ T321] ? mark_lock (kernel/locking/lockdep.c:4655 (discriminator 3)) 
[ 34.662824][ T321] ? kasan_save_stack (mm/kasan/common.c:49) 
[ 34.663026][ T321] ? __nla_validate_parse (lib/nlattr.c:638) 
[ 34.663231][ T321] __rtnl_newlink (net/core/rtnetlink.c:3696) 
[ 34.663437][ T321] ? 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) 
[ 34.663637][ T321] ? __pfx___rtnl_newlink (net/core/rtnetlink.c:3557) 
[ 34.663842][ T321] ? lockdep_hardirqs_on_prepare (kernel/locking/lockdep.c:4299 kernel/locking/lockdep.c:4358) 
[ 34.664092][ T321] ? __create_object (mm/kmemleak.c:751) 
[ 34.664292][ T321] ? trace_kmalloc (./include/trace/events/kmem.h:54 (discriminator 52)) 
[ 34.664493][ T321] rtnl_newlink (net/core/rtnetlink.c:3744) 
[ 34.664654][ T321] rtnetlink_rcv_msg (net/core/rtnetlink.c:6647) 
[ 34.664857][ T321] ? __pfx_rtnetlink_rcv_msg (net/core/rtnetlink.c:6541) 
[ 34.665053][ T321] ? 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) 
[ 34.665249][ T321] ? mark_lock (kernel/locking/lockdep.c:4655 (discriminator 3)) 
[ 34.665403][ T321] ? __lock_acquire (kernel/locking/lockdep.c:5142) 
[ 34.665603][ T321] netlink_rcv_skb (net/netlink/af_netlink.c:2550) 
[ 34.665800][ T321] ? __pfx_rtnetlink_rcv_msg (net/core/rtnetlink.c:6541) 
[ 34.665997][ T321] ? __pfx_netlink_rcv_skb (net/netlink/af_netlink.c:2527) 
[ 34.666216][ T321] ? netlink_deliver_tap (./include/linux/rcupdate.h:336 ./include/linux/rcupdate.h:869 net/netlink/af_netlink.c:340) 
[ 34.666414][ T321] ? 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) 
[ 34.666615][ T321] netlink_unicast (net/netlink/af_netlink.c:1331 net/netlink/af_netlink.c:1357) 
[ 34.666816][ T321] ? __pfx_netlink_unicast (net/netlink/af_netlink.c:1342) 
[ 34.667014][ T321] ? find_held_lock (kernel/locking/lockdep.c:5249) 
[ 34.667220][ T321] netlink_sendmsg (net/netlink/af_netlink.c:1901) 
[ 34.667427][ T321] ? __pfx_netlink_sendmsg (net/netlink/af_netlink.c:1820) 
[ 34.667625][ T321] ? __might_fault (mm/memory.c:6388 mm/memory.c:6381) 
[ 34.667829][ T321] ? __import_iovec (lib/iov_iter.c:1263 lib/iov_iter.c:1279) 
[ 34.668035][ T321] ____sys_sendmsg (net/socket.c:730 net/socket.c:745 net/socket.c:2597) 
[ 34.668236][ T321] ? __pfx_____sys_sendmsg (net/socket.c:2543) 
[ 34.668431][ T321] ? __pfx_copy_msghdr_from_user (net/socket.c:2523) 
[ 34.668677][ T321] ? __pfx_validate_chain (kernel/locking/lockdep.c:3824) 
[ 34.668886][ T321] ___sys_sendmsg (net/socket.c:2653) 
[ 34.669090][ T321] ? __pfx____sys_sendmsg (net/socket.c:2640) 
[ 34.669288][ T321] ? find_held_lock (kernel/locking/lockdep.c:5249) 
[ 34.669493][ T321] ? __lock_release (kernel/locking/lockdep.c:5435) 
[ 34.669688][ T321] ? __debug_check_no_obj_freed (lib/debugobjects.c:1001) 
[ 34.669939][ T321] ? __pfx___lock_release (kernel/locking/lockdep.c:5411) 
[ 34.670140][ T321] ? __pfx_do_raw_spin_lock (kernel/locking/spinlock_debug.c:114) 
[ 34.670344][ T321] ? lockdep_hardirqs_on_prepare (kernel/locking/lockdep.c:4299 kernel/locking/lockdep.c:4358) 
[ 34.670601][ T321] ? __fget_light (./include/linux/atomic/atomic-arch-fallback.h:479 ./include/linux/atomic/atomic-instrumented.h:50 fs/file.c:1145) 
[ 34.670817][ T321] __sys_sendmsg (./include/linux/file.h:34 net/socket.c:2682) 
[ 34.671016][ T321] ? __pfx___sys_sendmsg (net/socket.c:2668) 
[ 34.671216][ T321] ? __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) 
[ 34.671433][ T321] do_syscall_64 (arch/x86/entry/common.c:52 arch/x86/entry/common.c:83) 
[ 34.671632][ T321] entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:130) 
[   34.671877][  T321] RIP: 0033:0x7f2ccedbe7b7
[ 34.672080][ T321] 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)
[   34.672759][  T321] RSP: 002b:00007fff6c28fd28 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
[   34.673052][  T321] RAX: ffffffffffffffda RBX: 00007fff6c290450 RCX: 00007f2ccedbe7b7
[   34.673346][  T321] RDX: 0000000000000000 RSI: 00007fff6c28fd90 RDI: 0000000000000005
[   34.673637][  T321] RBP: 0000000000000004 R08: 0000000000000003 R09: 0000000000000000
[   34.673929][  T321] R10: 000000002aaef910 R11: 0000000000000246 R12: 0000000000000004
[   34.674227][  T321] R13: 0000000066bea025 R14: 0000000000496600 R15: 0000000000000000
| [ 34.676738][ T321] #0: ffffffff9b9bc508 (rtnl_mutex){+.+.}-{3:3}, at: rtnetlink_rcv_msg (net/core/rtnetlink.c:6645) 
| [ 34.677090][ T321] #1: ffff8880054bac58 (&br->lock){+...}-{2:2}, at: br_add_if (net/bridge/br_if.c:683) bridge
| [   34.677475][  T321]
| [   34.677475][  T321] stack backtrace:
[   34.678012][  T321] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[   34.678449][  T321] Call Trace:
[   34.678604][  T321]  <TASK>
[ 34.678706][ T321] dump_stack_lvl (lib/dump_stack.c:122) 
[ 34.678907][ T321] lockdep_rcu_suspicious (./include/linux/context_tracking.h:153 kernel/locking/lockdep.c:6725) 
[ 34.679103][ T321] ? __pfx_br_handle_frame (net/bridge/br_input.c:326) bridge
[ 34.679382][ T321] 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
[ 34.679655][ T321] ? __timer_delete (./include/linux/list.h:971 ./include/linux/timer.h:147 kernel/time/timer.c:1426) 
[ 34.679848][ T321] ? __timer_delete (./include/linux/list.h:971 ./include/linux/timer.h:147 kernel/time/timer.c:1426) 
[ 34.680046][ T321] br_info_notify (./include/linux/skbuff.h:1320 ./include/net/netlink.h:1015 net/bridge/br_netlink.c:645) bridge
[ 34.680279][ T321] ? mn_hlist_invalidate_range_start (mm/mmu_notifier.c:485 (discriminator 4)) 
[ 34.680540][ T321] br_make_forwarding (net/bridge/br_stp.c:465) bridge
[ 34.680764][ T321] br_port_state_selection (net/bridge/br_stp.c:495) bridge
[ 34.681044][ T321] br_stp_enable_port (net/bridge/br_stp_if.c:95) bridge
[ 34.681266][ T321] br_add_if (net/bridge/br_if.c:687) bridge
[ 34.681499][ T321] do_setlink (net/core/rtnetlink.c:2907) 
[ 34.681699][ T321] ? is_bpf_text_address (./include/linux/rcupdate.h:336 ./include/linux/rcupdate.h:869 ./kernel/bpf/core.c:769) 
[ 34.681897][ T321] ? __pfx_do_setlink (net/core/rtnetlink.c:2778) 
[ 34.682096][ T321] ? is_bpf_text_address (./kernel/bpf/core.c:772) 
[ 34.682288][ T321] ? kernel_text_address (kernel/extable.c:97 kernel/extable.c:94) 
[ 34.682481][ T321] ? __kernel_text_address (kernel/extable.c:79) 
[ 34.682674][ T321] ? unwind_get_return_address (arch/x86/kernel/unwind_orc.c:369 arch/x86/kernel/unwind_orc.c:364) 
[ 34.682867][ T321] ? __pfx_stack_trace_consume_entry (kernel/stacktrace.c:83) 
[ 34.683108][ T321] ? arch_stack_walk (arch/x86/kernel/stacktrace.c:26) 
[ 34.683315][ T321] ? stack_trace_save (kernel/stacktrace.c:123) 
[ 34.683513][ T321] ? __pfx_stack_trace_save (kernel/stacktrace.c:114) 
[ 34.683709][ T321] ? __pfx_validate_nla (lib/nlattr.c:396) 
[ 34.683907][ T321] ? mark_lock (kernel/locking/lockdep.c:4655 (discriminator 3)) 
[ 34.684057][ T321] ? kasan_save_stack (mm/kasan/common.c:49) 
[ 34.684257][ T321] ? __nla_validate_parse (lib/nlattr.c:638) 
[ 34.684463][ T321] __rtnl_newlink (net/core/rtnetlink.c:3696) 
[ 34.684668][ T321] ? 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) 
[ 34.684866][ T321] ? __pfx___rtnl_newlink (net/core/rtnetlink.c:3557) 
[ 34.685072][ T321] ? lockdep_hardirqs_on_prepare (kernel/locking/lockdep.c:4299 kernel/locking/lockdep.c:4358) 
[ 34.685322][ T321] ? __create_object (mm/kmemleak.c:751) 
[ 34.685525][ T321] ? trace_kmalloc (./include/trace/events/kmem.h:54 (discriminator 52)) 
[ 34.685727][ T321] rtnl_newlink (net/core/rtnetlink.c:3744) 
[ 34.685879][ T321] rtnetlink_rcv_msg (net/core/rtnetlink.c:6647) 
[ 34.686078][ T321] ? __pfx_rtnetlink_rcv_msg (net/core/rtnetlink.c:6541) 
[ 34.686276][ T321] ? 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) 
[ 34.686471][ T321] ? mark_lock (kernel/locking/lockdep.c:4655 (discriminator 3)) 
[ 34.686642][ T321] ? __lock_acquire (kernel/locking/lockdep.c:5142) 
[ 34.686968][ T321] netlink_rcv_skb (net/netlink/af_netlink.c:2550) 
[ 34.687287][ T321] ? __pfx_rtnetlink_rcv_msg (net/core/rtnetlink.c:6541) 
[ 34.687611][ T321] ? __pfx_netlink_rcv_skb (net/netlink/af_netlink.c:2527) 
[ 34.687962][ T321] ? netlink_deliver_tap (./include/linux/rcupdate.h:336 ./include/linux/rcupdate.h:869 net/netlink/af_netlink.c:340) 
[ 34.688283][ T321] ? 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) 
[ 34.688602][ T321] netlink_unicast (net/netlink/af_netlink.c:1331 net/netlink/af_netlink.c:1357) 
[ 34.688936][ T321] ? __pfx_netlink_unicast (net/netlink/af_netlink.c:1342) 
[ 34.689255][ T321] ? find_held_lock (kernel/locking/lockdep.c:5249) 
[ 34.689592][ T321] netlink_sendmsg (net/netlink/af_netlink.c:1901) 
[ 34.689922][ T321] ? __pfx_netlink_sendmsg (net/netlink/af_netlink.c:1820) 
[ 34.690242][ T321] ? __might_fault (mm/memory.c:6388 mm/memory.c:6381) 
[ 34.690579][ T321] ? __import_iovec (lib/iov_iter.c:1263 lib/iov_iter.c:1279) 
[ 34.690912][ T321] ____sys_sendmsg (net/socket.c:730 net/socket.c:745 net/socket.c:2597) 
[ 34.691244][ T321] ? __pfx_____sys_sendmsg (net/socket.c:2543) 
[ 34.691562][ T321] ? __pfx_copy_msghdr_from_user (net/socket.c:2523) 
[ 34.691951][ T321] ? __pfx_validate_chain (kernel/locking/lockdep.c:3824) 
[ 34.692297][ T321] ___sys_sendmsg (net/socket.c:2653) 
[ 34.692620][ T321] ? __pfx____sys_sendmsg (net/socket.c:2640) 
[ 34.692950][ T321] ? find_held_lock (kernel/locking/lockdep.c:5249) 
[ 34.693267][ T321] ? __lock_release (kernel/locking/lockdep.c:5435) 
[ 34.693587][ T321] ? __debug_check_no_obj_freed (lib/debugobjects.c:1001) 
[ 34.693977][ T321] ? __pfx___lock_release (kernel/locking/lockdep.c:5411) 
[ 34.694307][ T321] ? __pfx_do_raw_spin_lock (kernel/locking/spinlock_debug.c:114) 
[ 34.694636][ T321] ? lockdep_hardirqs_on_prepare (kernel/locking/lockdep.c:4299 kernel/locking/lockdep.c:4358) 
[ 34.695053][ T321] ? __fget_light (./include/linux/atomic/atomic-arch-fallback.h:479 ./include/linux/atomic/atomic-instrumented.h:50 fs/file.c:1145) 
[ 34.695383][ T321] __sys_sendmsg (./include/linux/file.h:34 net/socket.c:2682) 
[ 34.695710][ T321] ? __pfx___sys_sendmsg (net/socket.c:2668) 
[ 34.696020][ T321] ? __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) 
[ 34.696380][ T321] do_syscall_64 (arch/x86/entry/common.c:52 arch/x86/entry/common.c:83) 
[ 34.696706][ T321] entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:130) 
[   34.697090][  T321] RIP: 0033:0x7f2ccedbe7b7
[ 34.697388][ T321] 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)
[   34.698434][  T321] RSP: 002b:00007fff6c28fd28 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
[   34.698889][  T321] RAX: ffffffffffffffda RBX: 00007fff6c290450 RCX: 00007f2ccedbe7b7
[   34.699327][  T321] RDX: 0000000000000000 RSI: 00007fff6c28fd90 RDI: 0000000000000005
[   34.699772][  T321] RBP: 0000000000000004 R08: 0000000000000003 R09: 0000000000000000
[   34.700202][  T321] R10: 000000002aaef910 R11: 0000000000000246 R12: 0000000000000004
[   34.700641][  T321] R13: 0000000066bea025 R14: 0000000000496600 R15: 0000000000000000
| [   38.661190][  T354] 1 lock held by bridge/354:
| [ 38.661463][ T354] #0: ffffffff9b9bc508 (rtnl_mutex){+.+.}-{3:3}, at: rtnetlink_rcv_msg (net/core/rtnetlink.c:6645) 
| [   38.661814][  T354]
| [   38.661814][  T354] stack backtrace:
[   38.662355][  T354] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[   38.662757][  T354] Call Trace:
[   38.662895][  T354]  <TASK>
[ 38.662990][ T354] dump_stack_lvl (lib/dump_stack.c:122) 
[ 38.663177][ T354] lockdep_rcu_suspicious (./include/linux/context_tracking.h:153 kernel/locking/lockdep.c:6725) 
[ 38.663369][ T354] 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
[ 38.663640][ T354] br_info_notify (./include/linux/skbuff.h:1320 ./include/net/netlink.h:1015 net/bridge/br_netlink.c:645) bridge
[ 38.663855][ T354] br_setlink (net/bridge/br_netlink.c:669 net/bridge/br_netlink.c:1136) bridge
[ 38.664066][ T354] ? __pfx_br_setlink (net/bridge/br_netlink.c:1085) bridge
[ 38.664308][ T354] ? lock_acquire.part.0 (kernel/locking/lockdep.c:466 kernel/locking/lockdep.c:5761) 
[ 38.664516][ T354] ? rtnetlink_rcv_msg (net/core/rtnetlink.c:6645) 
[ 38.664700][ T354] ? 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) 
[ 38.664902][ T354] ? __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) 
[ 38.665087][ T354] ? __pfx___mutex_trylock_common (kernel/locking/mutex.c:104) 
[ 38.665318][ T354] ? rtnetlink_rcv_msg (net/core/rtnetlink.c:6645) 
[ 38.665516][ T354] ? lock_acquire (kernel/locking/lockdep.c:5732) 
[ 38.665695][ T354] ? trace_contention_end (./include/trace/events/lock.h:122 (discriminator 52)) 
[ 38.665899][ T354] ? __mutex_lock (./arch/x86/include/asm/preempt.h:94 kernel/locking/mutex.c:618 kernel/locking/mutex.c:752) 
[ 38.666080][ T354] ? find_held_lock (kernel/locking/lockdep.c:5249) 
[ 38.666275][ T354] ? rtnetlink_rcv_msg (net/core/rtnetlink.c:6645) 
[ 38.666466][ T354] ? __pfx___mutex_lock (kernel/locking/mutex.c:751) 
[ 38.666650][ T354] ? __pfx___lock_release (kernel/locking/lockdep.c:5411) 
[ 38.666846][ T354] ? __pfx_lock_acquire.part.0 (kernel/locking/lockdep.c:5724) 
[ 38.667029][ T354] ? trace_lock_acquire (./include/trace/events/lock.h:24 (discriminator 52)) 
[ 38.667231][ T354] rtnl_bridge_setlink (net/core/rtnetlink.c:5225) 
[ 38.667435][ T354] rtnetlink_rcv_msg (net/core/rtnetlink.c:6647) 
[ 38.667616][ T354] ? __pfx_rtnetlink_rcv_msg (net/core/rtnetlink.c:6541) 
[ 38.667808][ T354] ? 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) 
[ 38.667986][ T354] ? mark_lock (kernel/locking/lockdep.c:4655 (discriminator 3)) 
[ 38.668130][ T354] ? __lock_acquire (kernel/locking/lockdep.c:5142) 
[ 38.668312][ T354] netlink_rcv_skb (net/netlink/af_netlink.c:2550) 
[ 38.668493][ T354] ? __pfx_rtnetlink_rcv_msg (net/core/rtnetlink.c:6541) 
[ 38.668676][ T354] ? __pfx_netlink_rcv_skb (net/netlink/af_netlink.c:2527) 
[ 38.668873][ T354] ? netlink_deliver_tap (./include/linux/rcupdate.h:336 ./include/linux/rcupdate.h:869 net/netlink/af_netlink.c:340) 
[ 38.669053][ T354] ? 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) 
[ 38.669239][ T354] netlink_unicast (net/netlink/af_netlink.c:1331 net/netlink/af_netlink.c:1357) 
[ 38.669424][ T354] ? __pfx_netlink_unicast (net/netlink/af_netlink.c:1342) 
[ 38.669606][ T354] ? find_held_lock (kernel/locking/lockdep.c:5249) 
[ 38.669792][ T354] netlink_sendmsg (net/netlink/af_netlink.c:1901) 
[ 38.669977][ T354] ? __pfx_netlink_sendmsg (net/netlink/af_netlink.c:1820) 
[ 38.670156][ T354] ? __might_fault (mm/memory.c:6388 mm/memory.c:6381) 
[ 38.670341][ T354] ? __import_iovec (lib/iov_iter.c:1263 lib/iov_iter.c:1279) 
[ 38.670546][ T354] ____sys_sendmsg (net/socket.c:730 net/socket.c:745 net/socket.c:2597) 
[ 38.670733][ T354] ? __pfx_____sys_sendmsg (net/socket.c:2543) 
[ 38.670912][ T354] ? __pfx_copy_msghdr_from_user (net/socket.c:2523) 
[ 38.671155][ T354] ___sys_sendmsg (net/socket.c:2653) 
[ 38.671336][ T354] ? __pfx____sys_sendmsg (net/socket.c:2640) 
[ 38.671520][ T354] ? __lock_acquire (kernel/locking/lockdep.c:5142) 
[ 38.671700][ T354] ? usage_skip (kernel/locking/lockdep.c:2294 kernel/locking/lockdep.c:2262) 
[ 38.671887][ T354] ? reacquire_held_locks (kernel/locking/lockdep.c:5284) 
[ 38.672065][ T354] ? 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) 
[ 38.672273][ T354] ? __fget_light (./include/linux/atomic/atomic-arch-fallback.h:479 ./include/linux/atomic/atomic-instrumented.h:50 fs/file.c:1145) 
[ 38.672468][ T354] __sys_sendmsg (./include/linux/file.h:34 net/socket.c:2682) 
[ 38.672664][ T354] ? __pfx___sys_sendmsg (net/socket.c:2668) 
[ 38.672875][ T354] ? __pfx___up_read (kernel/locking/rwsem.c:1339) 
[ 38.673094][ T354] do_syscall_64 (arch/x86/entry/common.c:52 arch/x86/entry/common.c:83) 
[ 38.673277][ T354] entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:130) 
[   38.673512][  T354] RIP: 0033:0x7f23519b47b7
[ 38.673716][ T354] 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)
[   38.674378][  T354] RSP: 002b:00007ffce5959638 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
[   38.674654][  T354] RAX: ffffffffffffffda RBX: 000000000000ffff RCX: 00007f23519b47b7
[   38.674938][  T354] RDX: 0000000000000000 RSI: 00007ffce59596a0 RDI: 0000000000000005
[   38.675237][  T354] RBP: 00007ffce5959790 R08: 0000000000000034 R09: 0000000000000000
[   38.675517][  T354] R10: 00007f235186d708 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