======================================
| [ 34.336570][ T318] #0: ffffffffb8bbc508 (rtnl_mutex){+.+.}-{3:3}, at: rtnetlink_rcv_msg (net/core/rtnetlink.c:6645) 
| [ 34.336954][ T318] #1: ffff8880055eac58 (&br->lock){+...}-{2:2}, at: br_add_if (net/bridge/br_if.c:683) bridge
| [   34.337400][  T318]
| [   34.337400][  T318] stack backtrace:
[   34.337952][  T318] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[   34.338367][  T318] Call Trace:
[   34.338521][  T318]  <TASK>
[ 34.338621][ T318] dump_stack_lvl (lib/dump_stack.c:122) 
[ 34.338818][ T318] lockdep_rcu_suspicious (./include/linux/context_tracking.h:153 kernel/locking/lockdep.c:6725) 
[ 34.339039][ T318] ? __pfx_br_handle_frame (net/bridge/br_input.c:326) bridge
[ 34.339322][ T318] 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
[ 34.339581][ T318] ? __timer_delete (./include/linux/list.h:971 ./include/linux/timer.h:147 kernel/time/timer.c:1426) 
[ 34.339785][ T318] ? __timer_delete (./include/linux/list.h:971 ./include/linux/timer.h:147 kernel/time/timer.c:1426) 
[ 34.339998][ T318] br_info_notify (./include/linux/skbuff.h:1320 ./include/net/netlink.h:1015 net/bridge/br_netlink.c:645) bridge
[ 34.340218][ T318] ? mn_hlist_invalidate_range_start (mm/mmu_notifier.c:485 (discriminator 4)) 
[ 34.340466][ T318] br_make_forwarding (net/bridge/br_stp.c:465) bridge
[ 34.340700][ T318] br_port_state_selection (net/bridge/br_stp.c:495) bridge
[ 34.341008][ T318] br_stp_enable_port (net/bridge/br_stp_if.c:95) bridge
[ 34.341223][ T318] br_add_if (net/bridge/br_if.c:687) bridge
[ 34.341469][ T318] do_setlink (net/core/rtnetlink.c:2907) 
[ 34.341675][ T318] ? is_bpf_text_address (./include/linux/rcupdate.h:336 ./include/linux/rcupdate.h:869 ./kernel/bpf/core.c:769) 
[ 34.341868][ T318] ? __pfx_do_setlink (net/core/rtnetlink.c:2778) 
[ 34.342126][ T318] ? is_bpf_text_address (./kernel/bpf/core.c:772) 
[ 34.342312][ T318] ? kernel_text_address (kernel/extable.c:97 kernel/extable.c:94) 
[ 34.342503][ T318] ? __kernel_text_address (kernel/extable.c:79) 
[ 34.342687][ T318] ? unwind_get_return_address (arch/x86/kernel/unwind_orc.c:369 arch/x86/kernel/unwind_orc.c:364) 
[ 34.342898][ T318] ? __pfx_stack_trace_consume_entry (kernel/stacktrace.c:83) 
[ 34.343130][ T318] ? arch_stack_walk (arch/x86/kernel/stacktrace.c:26) 
[ 34.343333][ T318] ? stack_trace_save (kernel/stacktrace.c:123) 
[ 34.343522][ T318] ? __pfx_stack_trace_save (kernel/stacktrace.c:114) 
[ 34.343709][ T318] ? __pfx_validate_nla (lib/nlattr.c:396) 
[ 34.343928][ T318] ? mark_lock (kernel/locking/lockdep.c:4655 (discriminator 3)) 
[ 34.344075][ T318] ? kasan_save_stack (mm/kasan/common.c:49) 
[ 34.344283][ T318] ? __nla_validate_parse (lib/nlattr.c:638) 
[ 34.344476][ T318] __rtnl_newlink (net/core/rtnetlink.c:3696) 
[ 34.344687][ T318] ? 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) 
[ 34.344912][ T318] ? __pfx___rtnl_newlink (net/core/rtnetlink.c:3557) 
[ 34.345110][ T318] ? lockdep_hardirqs_on_prepare (kernel/locking/lockdep.c:4299 kernel/locking/lockdep.c:4358) 
[ 34.345361][ T318] ? __create_object (mm/kmemleak.c:751) 
[ 34.345573][ T318] ? trace_kmalloc (./include/trace/events/kmem.h:54 (discriminator 52)) 
[ 34.345769][ T318] rtnl_newlink (net/core/rtnetlink.c:3744) 
[ 34.345942][ T318] rtnetlink_rcv_msg (net/core/rtnetlink.c:6647) 
[ 34.346154][ T318] ? __pfx_rtnetlink_rcv_msg (net/core/rtnetlink.c:6541) 
[ 34.346342][ T318] ? 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) 
[ 34.346545][ T318] ? mark_lock (kernel/locking/lockdep.c:4655 (discriminator 3)) 
[ 34.346693][ T318] ? __lock_acquire (kernel/locking/lockdep.c:5142) 
[ 34.346918][ T318] netlink_rcv_skb (net/netlink/af_netlink.c:2550) 
[ 34.347108][ T318] ? __pfx_rtnetlink_rcv_msg (net/core/rtnetlink.c:6541) 
[ 34.347295][ T318] ? __pfx_netlink_rcv_skb (net/netlink/af_netlink.c:2527) 
[ 34.347497][ T318] ? netlink_deliver_tap (./include/linux/rcupdate.h:336 ./include/linux/rcupdate.h:869 net/netlink/af_netlink.c:340) 
[ 34.347687][ T318] ? 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) 
[ 34.347906][ T318] netlink_unicast (net/netlink/af_netlink.c:1331 net/netlink/af_netlink.c:1357) 
[ 34.348100][ T318] ? __pfx_netlink_unicast (net/netlink/af_netlink.c:1342) 
[ 34.348305][ T318] ? find_held_lock (kernel/locking/lockdep.c:5249) 
[ 34.348509][ T318] netlink_sendmsg (net/netlink/af_netlink.c:1901) 
[ 34.348723][ T318] ? __pfx_netlink_sendmsg (net/netlink/af_netlink.c:1820) 
[ 34.348935][ T318] ? __might_fault (mm/memory.c:6388 mm/memory.c:6381) 
[ 34.349128][ T318] ? __import_iovec (lib/iov_iter.c:1263 lib/iov_iter.c:1279) 
[ 34.349337][ T318] ____sys_sendmsg (net/socket.c:730 net/socket.c:745 net/socket.c:2597) 
[ 34.349541][ T318] ? __pfx_____sys_sendmsg (net/socket.c:2543) 
[ 34.349727][ T318] ? __pfx_copy_msghdr_from_user (net/socket.c:2523) 
[ 34.349991][ T318] ? __pfx_validate_chain (kernel/locking/lockdep.c:3824) 
[ 34.350198][ T318] ___sys_sendmsg (net/socket.c:2653) 
[ 34.350389][ T318] ? __pfx____sys_sendmsg (net/socket.c:2640) 
[ 34.350578][ T318] ? find_held_lock (kernel/locking/lockdep.c:5249) 
[ 34.350768][ T318] ? __lock_release (kernel/locking/lockdep.c:5435) 
[ 34.350965][ T318] ? __debug_check_no_obj_freed (lib/debugobjects.c:1001) 
[ 34.351199][ T318] ? __pfx___lock_release (kernel/locking/lockdep.c:5411) 
[ 34.351389][ T318] ? __pfx_do_raw_spin_lock (kernel/locking/spinlock_debug.c:114) 
[ 34.351585][ T318] ? lockdep_hardirqs_on_prepare (kernel/locking/lockdep.c:4299 kernel/locking/lockdep.c:4358) 
[ 34.351825][ T318] ? __fget_light (./include/linux/atomic/atomic-arch-fallback.h:479 ./include/linux/atomic/atomic-instrumented.h:50 fs/file.c:1145) 
[ 34.352039][ T318] __sys_sendmsg (./include/linux/file.h:34 net/socket.c:2682) 
[ 34.352232][ T318] ? __pfx___sys_sendmsg (net/socket.c:2668) 
[ 34.352417][ T318] ? __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) 
[ 34.352628][ T318] do_syscall_64 (arch/x86/entry/common.c:52 arch/x86/entry/common.c:83) 
[ 34.352822][ T318] entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:130) 
[   34.353076][  T318] RIP: 0033:0x7f96494e87b7
[ 34.353275][ T318] 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)
[   34.353923][  T318] RSP: 002b:00007ffdaff99268 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
[   34.354207][  T318] RAX: ffffffffffffffda RBX: 00007ffdaff99990 RCX: 00007f96494e87b7
[   34.354485][  T318] RDX: 0000000000000000 RSI: 00007ffdaff992d0 RDI: 0000000000000005
[   34.354772][  T318] RBP: 0000000000000004 R08: 0000000000000003 R09: 0000000000000000
[   34.355060][  T318] R10: 0000000003cf7910 R11: 0000000000000246 R12: 0000000000000004
[   34.355333][  T318] R13: 0000000066bea655 R14: 0000000000496600 R15: 0000000000000000
| [ 34.357761][ T318] #0: ffffffffb8bbc508 (rtnl_mutex){+.+.}-{3:3}, at: rtnetlink_rcv_msg (net/core/rtnetlink.c:6645) 
| [ 34.358162][ T318] #1: ffff8880055eac58 (&br->lock){+...}-{2:2}, at: br_add_if (net/bridge/br_if.c:683) bridge
| [   34.358538][  T318]
| [   34.358538][  T318] stack backtrace:
[   34.359065][  T318] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[   34.359485][  T318] Call Trace:
[   34.359636][  T318]  <TASK>
[ 34.359738][ T318] dump_stack_lvl (lib/dump_stack.c:122) 
[ 34.359943][ T318] lockdep_rcu_suspicious (./include/linux/context_tracking.h:153 kernel/locking/lockdep.c:6725) 
[ 34.360129][ T318] ? __pfx_br_handle_frame (net/bridge/br_input.c:326) bridge
[ 34.360397][ T318] 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
[ 34.360669][ T318] ? __timer_delete (./include/linux/list.h:971 ./include/linux/timer.h:147 kernel/time/timer.c:1426) 
[ 34.360854][ T318] ? __timer_delete (./include/linux/list.h:971 ./include/linux/timer.h:147 kernel/time/timer.c:1426) 
[ 34.361068][ T318] br_info_notify (./include/linux/skbuff.h:1320 ./include/net/netlink.h:1015 net/bridge/br_netlink.c:645) bridge
[ 34.361282][ T318] ? mn_hlist_invalidate_range_start (mm/mmu_notifier.c:485 (discriminator 4)) 
[ 34.361517][ T318] br_make_forwarding (net/bridge/br_stp.c:465) bridge
[ 34.361734][ T318] br_port_state_selection (net/bridge/br_stp.c:495) bridge
[ 34.362014][ T318] br_stp_enable_port (net/bridge/br_stp_if.c:95) bridge
[ 34.362245][ T318] br_add_if (net/bridge/br_if.c:687) bridge
[ 34.362477][ T318] do_setlink (net/core/rtnetlink.c:2907) 
[ 34.362666][ T318] ? is_bpf_text_address (./include/linux/rcupdate.h:336 ./include/linux/rcupdate.h:869 ./kernel/bpf/core.c:769) 
[ 34.362859][ T318] ? __pfx_do_setlink (net/core/rtnetlink.c:2778) 
[ 34.363054][ T318] ? is_bpf_text_address (./kernel/bpf/core.c:772) 
[ 34.363239][ T318] ? kernel_text_address (kernel/extable.c:97 kernel/extable.c:94) 
[ 34.363442][ T318] ? __kernel_text_address (kernel/extable.c:79) 
[ 34.363627][ T318] ? unwind_get_return_address (arch/x86/kernel/unwind_orc.c:369 arch/x86/kernel/unwind_orc.c:364) 
[ 34.363834][ T318] ? __pfx_stack_trace_consume_entry (kernel/stacktrace.c:83) 
[ 34.364075][ T318] ? arch_stack_walk (arch/x86/kernel/stacktrace.c:26) 
[ 34.364287][ T318] ? stack_trace_save (kernel/stacktrace.c:123) 
[ 34.364488][ T318] ? __pfx_stack_trace_save (kernel/stacktrace.c:114) 
[ 34.364673][ T318] ? __pfx_validate_nla (lib/nlattr.c:396) 
[ 34.364890][ T318] ? mark_lock (kernel/locking/lockdep.c:4655 (discriminator 3)) 
[ 34.365042][ T318] ? kasan_save_stack (mm/kasan/common.c:49) 
[ 34.365248][ T318] ? __nla_validate_parse (lib/nlattr.c:638) 
[ 34.365443][ T318] __rtnl_newlink (net/core/rtnetlink.c:3696) 
[ 34.365643][ T318] ? 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) 
[ 34.365829][ T318] ? __pfx___rtnl_newlink (net/core/rtnetlink.c:3557) 
[ 34.366080][ T318] ? lockdep_hardirqs_on_prepare (kernel/locking/lockdep.c:4299 kernel/locking/lockdep.c:4358) 
[ 34.366501][ T318] ? __create_object (mm/kmemleak.c:751) 
[ 34.366692][ T318] ? trace_kmalloc (./include/trace/events/kmem.h:54 (discriminator 52)) 
[ 34.366894][ T318] rtnl_newlink (net/core/rtnetlink.c:3744) 
[ 34.367039][ T318] rtnetlink_rcv_msg (net/core/rtnetlink.c:6647) 
[ 34.367223][ T318] ? __pfx_rtnetlink_rcv_msg (net/core/rtnetlink.c:6541) 
[ 34.367549][ T318] ? 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) 
[ 34.367735][ T318] ? mark_lock (kernel/locking/lockdep.c:4655 (discriminator 3)) 
[ 34.367898][ T318] ? __lock_acquire (kernel/locking/lockdep.c:5142) 
[ 34.368104][ T318] netlink_rcv_skb (net/netlink/af_netlink.c:2550) 
[ 34.368428][ T318] ? __pfx_rtnetlink_rcv_msg (net/core/rtnetlink.c:6541) 
[ 34.368632][ T318] ? __pfx_netlink_rcv_skb (net/netlink/af_netlink.c:2527) 
[ 34.368836][ T318] ? netlink_deliver_tap (./include/linux/rcupdate.h:336 ./include/linux/rcupdate.h:869 net/netlink/af_netlink.c:340) 
[ 34.369052][ T318] ? 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) 
[ 34.369249][ T318] netlink_unicast (net/netlink/af_netlink.c:1331 net/netlink/af_netlink.c:1357) 
[ 34.369567][ T318] ? __pfx_netlink_unicast (net/netlink/af_netlink.c:1342) 
[ 34.369768][ T318] ? find_held_lock (kernel/locking/lockdep.c:5249) 
[ 34.369997][ T318] netlink_sendmsg (net/netlink/af_netlink.c:1901) 
[ 34.370196][ T318] ? __pfx_netlink_sendmsg (net/netlink/af_netlink.c:1820) 
[ 34.370618][ T318] ? __might_fault (mm/memory.c:6388 mm/memory.c:6381) 
[ 34.370827][ T318] ? __import_iovec (lib/iov_iter.c:1263 lib/iov_iter.c:1279) 
[ 34.371041][ T318] ____sys_sendmsg (net/socket.c:730 net/socket.c:745 net/socket.c:2597) 
[ 34.371231][ T318] ? __pfx_____sys_sendmsg (net/socket.c:2543) 
[ 34.371550][ T318] ? __pfx_copy_msghdr_from_user (net/socket.c:2523) 
[ 34.371781][ T318] ? __pfx_validate_chain (kernel/locking/lockdep.c:3824) 
[ 34.372004][ T318] ___sys_sendmsg (net/socket.c:2653) 
[ 34.372219][ T318] ? __pfx____sys_sendmsg (net/socket.c:2640) 
[ 34.372534][ T318] ? find_held_lock (kernel/locking/lockdep.c:5249) 
[ 34.372725][ T318] ? __lock_release (kernel/locking/lockdep.c:5435) 
[ 34.372939][ T318] ? __debug_check_no_obj_freed (lib/debugobjects.c:1001) 
[ 34.373207][ T318] ? __pfx___lock_release (kernel/locking/lockdep.c:5411) 
[ 34.373525][ T318] ? __pfx_do_raw_spin_lock (kernel/locking/spinlock_debug.c:114) 
[ 34.373740][ T318] ? lockdep_hardirqs_on_prepare (kernel/locking/lockdep.c:4299 kernel/locking/lockdep.c:4358) 
[ 34.373998][ T318] ? __fget_light (./include/linux/atomic/atomic-arch-fallback.h:479 ./include/linux/atomic/atomic-instrumented.h:50 fs/file.c:1145) 
[ 34.374213][ T318] __sys_sendmsg (./include/linux/file.h:34 net/socket.c:2682) 
[ 34.374525][ T318] ? __pfx___sys_sendmsg (net/socket.c:2668) 
[ 34.374707][ T318] ? __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) 
[ 34.374921][ T318] do_syscall_64 (arch/x86/entry/common.c:52 arch/x86/entry/common.c:83) 
[ 34.375114][ T318] entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:130) 
[   34.375460][  T318] RIP: 0033:0x7f96494e87b7
[ 34.375649][ T318] 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)
[   34.376398][  T318] RSP: 002b:00007ffdaff99268 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
[   34.376677][  T318] RAX: ffffffffffffffda RBX: 00007ffdaff99990 RCX: 00007f96494e87b7
[   34.376961][  T318] RDX: 0000000000000000 RSI: 00007ffdaff992d0 RDI: 0000000000000005
[   34.377362][  T318] RBP: 0000000000000004 R08: 0000000000000003 R09: 0000000000000000
[   34.377632][  T318] R10: 0000000003cf7910 R11: 0000000000000246 R12: 0000000000000004
[   34.377918][  T318] R13: 0000000066bea655 R14: 0000000000496600 R15: 0000000000000000
| [ 34.380646][ T318] #0: ffffffffb8bbc508 (rtnl_mutex){+.+.}-{3:3}, at: rtnetlink_rcv_msg (net/core/rtnetlink.c:6645) 
| [ 34.381108][ T318] #1: ffff8880055eac58 (&br->lock){+...}-{2:2}, at: br_add_if (net/bridge/br_if.c:683) bridge
| [   34.381474][  T318]
| [   34.381474][  T318] stack backtrace:
[   34.382133][  T318] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[   34.382538][  T318] Call Trace:
[   34.382791][  T318]  <TASK>
[ 34.382907][ T318] dump_stack_lvl (lib/dump_stack.c:122) 
[ 34.383111][ T318] lockdep_rcu_suspicious (./include/linux/context_tracking.h:153 kernel/locking/lockdep.c:6725) 
[ 34.383304][ T318] ? __pfx_br_handle_frame (net/bridge/br_input.c:326) bridge
[ 34.383565][ T318] 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
[ 34.383947][ T318] ? __timer_delete (./include/linux/list.h:971 ./include/linux/timer.h:147 kernel/time/timer.c:1426) 
[ 34.384130][ T318] ? __timer_delete (./include/linux/list.h:971 ./include/linux/timer.h:147 kernel/time/timer.c:1426) 
[ 34.384316][ T318] br_info_notify (./include/linux/skbuff.h:1320 ./include/net/netlink.h:1015 net/bridge/br_netlink.c:645) bridge
[ 34.384528][ T318] ? mn_hlist_invalidate_range_start (mm/mmu_notifier.c:485 (discriminator 4)) 
[ 34.384884][ T318] br_make_forwarding (net/bridge/br_stp.c:465) bridge
[ 34.385110][ T318] br_port_state_selection (net/bridge/br_stp.c:495) bridge
[ 34.385376][ T318] br_stp_enable_port (net/bridge/br_stp_if.c:95) bridge
[ 34.385593][ T318] br_add_if (net/bridge/br_if.c:687) bridge
[ 34.386054][ T318] do_setlink (net/core/rtnetlink.c:2907) 
[ 34.386240][ T318] ? is_bpf_text_address (./include/linux/rcupdate.h:336 ./include/linux/rcupdate.h:869 ./kernel/bpf/core.c:769) 
[ 34.386426][ T318] ? __pfx_do_setlink (net/core/rtnetlink.c:2778) 
[ 34.386613][ T318] ? is_bpf_text_address (./kernel/bpf/core.c:772) 
[ 34.386929][ T318] ? kernel_text_address (kernel/extable.c:97 kernel/extable.c:94) 
[ 34.387125][ T318] ? __kernel_text_address (kernel/extable.c:79) 
[ 34.387325][ T318] ? unwind_get_return_address (arch/x86/kernel/unwind_orc.c:369 arch/x86/kernel/unwind_orc.c:364) 
[ 34.387520][ T318] ? __pfx_stack_trace_consume_entry (kernel/stacktrace.c:83) 
[ 34.387892][ T318] ? arch_stack_walk (arch/x86/kernel/stacktrace.c:26) 
[ 34.388090][ T318] ? stack_trace_save (kernel/stacktrace.c:123) 
[ 34.388273][ T318] ? __pfx_stack_trace_save (kernel/stacktrace.c:114) 
[ 34.388458][ T318] ? __pfx_validate_nla (lib/nlattr.c:396) 
[ 34.388642][ T318] ? mark_lock (kernel/locking/lockdep.c:4655 (discriminator 3)) 
[ 34.388789][ T318] ? kasan_save_stack (mm/kasan/common.c:49) 
[ 34.388984][ T318] ? __nla_validate_parse (lib/nlattr.c:638) 
[ 34.389173][ T318] __rtnl_newlink (net/core/rtnetlink.c:3696) 
[ 34.389365][ T318] ? 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) 
[ 34.389660][ T318] ? __pfx___rtnl_newlink (net/core/rtnetlink.c:3557) 
[ 34.389854][ T318] ? lockdep_hardirqs_on_prepare (kernel/locking/lockdep.c:4299 kernel/locking/lockdep.c:4358) 
[ 34.390103][ T318] ? __create_object (mm/kmemleak.c:751) 
[ 34.390290][ T318] ? trace_kmalloc (./include/trace/events/kmem.h:54 (discriminator 52)) 
[ 34.390597][ T318] rtnl_newlink (net/core/rtnetlink.c:3744) 
[ 34.390738][ T318] rtnetlink_rcv_msg (net/core/rtnetlink.c:6647) 
[ 34.390970][ T318] ? __pfx_rtnetlink_rcv_msg (net/core/rtnetlink.c:6541) 
[ 34.391180][ T318] ? 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) 
[ 34.391474][ T318] ? mark_lock (kernel/locking/lockdep.c:4655 (discriminator 3)) 
[ 34.391619][ T318] ? __lock_acquire (kernel/locking/lockdep.c:5142) 
[ 34.391804][ T318] netlink_rcv_skb (net/netlink/af_netlink.c:2550) 
[ 34.392001][ T318] ? __pfx_rtnetlink_rcv_msg (net/core/rtnetlink.c:6541) 
[ 34.392198][ T318] ? __pfx_netlink_rcv_skb (net/netlink/af_netlink.c:2527) 
[ 34.392517][ T318] ? netlink_deliver_tap (./include/linux/rcupdate.h:336 ./include/linux/rcupdate.h:869 net/netlink/af_netlink.c:340) 
[ 34.392705][ T318] ? 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) 
[ 34.392898][ T318] netlink_unicast (net/netlink/af_netlink.c:1331 net/netlink/af_netlink.c:1357) 
[ 34.393086][ T318] ? __pfx_netlink_unicast (net/netlink/af_netlink.c:1342) 
[ 34.393380][ T318] ? find_held_lock (kernel/locking/lockdep.c:5249) 
[ 34.393569][ T318] netlink_sendmsg (net/netlink/af_netlink.c:1901) 
[ 34.393757][ T318] ? __pfx_netlink_sendmsg (net/netlink/af_netlink.c:1820) 
[ 34.393955][ T318] ? __might_fault (mm/memory.c:6388 mm/memory.c:6381) 
[ 34.394258][ T318] ? __import_iovec (lib/iov_iter.c:1263 lib/iov_iter.c:1279) 
[ 34.394449][ T318] ____sys_sendmsg (net/socket.c:730 net/socket.c:745 net/socket.c:2597) 
[ 34.394636][ T318] ? __pfx_____sys_sendmsg (net/socket.c:2543) 
[ 34.394818][ T318] ? __pfx_copy_msghdr_from_user (net/socket.c:2523) 
[ 34.395186][ T318] ? __pfx_validate_chain (kernel/locking/lockdep.c:3824) 
[ 34.395396][ T318] ___sys_sendmsg (net/socket.c:2653) 
[ 34.395599][ T318] ? __pfx____sys_sendmsg (net/socket.c:2640) 
[ 34.395802][ T318] ? find_held_lock (kernel/locking/lockdep.c:5249) 
[ 34.396139][ T318] ? __lock_release (kernel/locking/lockdep.c:5435) 
[ 34.396333][ T318] ? __debug_check_no_obj_freed (lib/debugobjects.c:1001) 
[ 34.396564][ T318] ? __pfx___lock_release (kernel/locking/lockdep.c:5411) 
[ 34.396789][ T318] ? __pfx_do_raw_spin_lock (kernel/locking/spinlock_debug.c:114) 
[ 34.397265][ T318] ? lockdep_hardirqs_on_prepare (kernel/locking/lockdep.c:4299 kernel/locking/lockdep.c:4358) 
[ 34.397637][ T318] ? __fget_light (./include/linux/atomic/atomic-arch-fallback.h:479 ./include/linux/atomic/atomic-instrumented.h:50 fs/file.c:1145) 
[ 34.397957][ T318] __sys_sendmsg (./include/linux/file.h:34 net/socket.c:2682) 
[ 34.398282][ T318] ? __pfx___sys_sendmsg (net/socket.c:2668) 
[ 34.398787][ T318] ? __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) 
[ 34.399139][ T318] do_syscall_64 (arch/x86/entry/common.c:52 arch/x86/entry/common.c:83) 
[ 34.399464][ T318] entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:130) 
[   34.399851][  T318] RIP: 0033:0x7f96494e87b7
[ 34.400388][ T318] 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)
[   34.401455][  T318] RSP: 002b:00007ffdaff99268 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
[   34.402135][  T318] RAX: ffffffffffffffda RBX: 00007ffdaff99990 RCX: 00007f96494e87b7
[   34.402556][  T318] RDX: 0000000000000000 RSI: 00007ffdaff992d0 RDI: 0000000000000005
[   34.402848][  T318] RBP: 0000000000000004 R08: 0000000000000003 R09: 0000000000000000
[   34.403409][  T318] R10: 0000000003cf7910 R11: 0000000000000246 R12: 0000000000000004
[   34.403704][  T318] R13: 0000000066bea655 R14: 0000000000496600 R15: 0000000000000000
| [   39.305041][  T355] 1 lock held by bridge/355:
| [ 39.305313][ T355] #0: ffffffffb8bbc508 (rtnl_mutex){+.+.}-{3:3}, at: rtnetlink_rcv_msg (net/core/rtnetlink.c:6645) 
| [   39.305650][  T355]
| [   39.305650][  T355] stack backtrace:
[   39.306173][  T355] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[   39.306579][  T355] Call Trace:
[   39.306730][  T355]  <TASK>
[ 39.306826][ T355] dump_stack_lvl (lib/dump_stack.c:122) 
[ 39.307023][ T355] lockdep_rcu_suspicious (./include/linux/context_tracking.h:153 kernel/locking/lockdep.c:6725) 
[ 39.307220][ T355] 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
[ 39.307491][ T355] br_info_notify (./include/linux/skbuff.h:1320 ./include/net/netlink.h:1015 net/bridge/br_netlink.c:645) bridge
[ 39.307709][ T355] br_setlink (net/bridge/br_netlink.c:669 net/bridge/br_netlink.c:1136) bridge
[ 39.307921][ T355] ? __pfx_br_setlink (net/bridge/br_netlink.c:1085) bridge
[ 39.308144][ T355] ? lock_acquire.part.0 (kernel/locking/lockdep.c:466 kernel/locking/lockdep.c:5761) 
[ 39.308327][ T355] ? rtnetlink_rcv_msg (net/core/rtnetlink.c:6645) 
[ 39.308506][ T355] ? 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) 
[ 39.308694][ T355] ? __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) 
[ 39.308876][ T355] ? __pfx___mutex_trylock_common (kernel/locking/mutex.c:104) 
[ 39.309098][ T355] ? rtnetlink_rcv_msg (net/core/rtnetlink.c:6645) 
[ 39.309278][ T355] ? lock_acquire (kernel/locking/lockdep.c:5732) 
[ 39.309461][ T355] ? trace_contention_end (./include/trace/events/lock.h:122 (discriminator 52)) 
[ 39.309642][ T355] ? __mutex_lock (./arch/x86/include/asm/preempt.h:94 kernel/locking/mutex.c:618 kernel/locking/mutex.c:752) 
[ 39.309826][ T355] ? find_held_lock (kernel/locking/lockdep.c:5249) 
[ 39.310015][ T355] ? rtnetlink_rcv_msg (net/core/rtnetlink.c:6645) 
[ 39.310224][ T355] ? __pfx___mutex_lock (kernel/locking/mutex.c:751) 
[ 39.310413][ T355] ? __pfx___lock_release (kernel/locking/lockdep.c:5411) 
[ 39.310596][ T355] ? __pfx_lock_acquire.part.0 (kernel/locking/lockdep.c:5724) 
[ 39.310784][ T355] ? trace_lock_acquire (./include/trace/events/lock.h:24 (discriminator 52)) 
[ 39.310974][ T355] rtnl_bridge_setlink (net/core/rtnetlink.c:5225) 
[ 39.311156][ T355] rtnetlink_rcv_msg (net/core/rtnetlink.c:6647) 
[ 39.311340][ T355] ? __pfx_rtnetlink_rcv_msg (net/core/rtnetlink.c:6541) 
[ 39.311520][ T355] ? 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) 
[ 39.311707][ T355] ? mark_lock (kernel/locking/lockdep.c:4655 (discriminator 3)) 
[ 39.311855][ T355] ? __lock_acquire (kernel/locking/lockdep.c:5142) 
[ 39.312052][ T355] netlink_rcv_skb (net/netlink/af_netlink.c:2550) 
[ 39.312242][ T355] ? __pfx_rtnetlink_rcv_msg (net/core/rtnetlink.c:6541) 
[ 39.312434][ T355] ? __pfx_netlink_rcv_skb (net/netlink/af_netlink.c:2527) 
[ 39.312631][ T355] ? netlink_deliver_tap (./include/linux/rcupdate.h:336 ./include/linux/rcupdate.h:869 net/netlink/af_netlink.c:340) 
[ 39.312818][ T355] ? 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) 
[ 39.313005][ T355] netlink_unicast (net/netlink/af_netlink.c:1331 net/netlink/af_netlink.c:1357) 
[ 39.313197][ T355] ? __pfx_netlink_unicast (net/netlink/af_netlink.c:1342) 
[ 39.313385][ T355] ? find_held_lock (kernel/locking/lockdep.c:5249) 
[ 39.313576][ T355] netlink_sendmsg (net/netlink/af_netlink.c:1901) 
[ 39.313770][ T355] ? __pfx_netlink_sendmsg (net/netlink/af_netlink.c:1820) 
[ 39.313954][ T355] ? __might_fault (mm/memory.c:6388 mm/memory.c:6381) 
[ 39.314171][ T355] ? __import_iovec (lib/iov_iter.c:1263 lib/iov_iter.c:1279) 
[ 39.314374][ T355] ____sys_sendmsg (net/socket.c:730 net/socket.c:745 net/socket.c:2597) 
[ 39.314567][ T355] ? __pfx_____sys_sendmsg (net/socket.c:2543) 
[ 39.314756][ T355] ? __pfx_copy_msghdr_from_user (net/socket.c:2523) 
[ 39.315013][ T355] ___sys_sendmsg (net/socket.c:2653) 
[ 39.315200][ T355] ? __pfx____sys_sendmsg (net/socket.c:2640) 
[ 39.315380][ T355] ? __lock_acquire (kernel/locking/lockdep.c:5142) 
[ 39.315562][ T355] ? usage_skip (kernel/locking/lockdep.c:2294 kernel/locking/lockdep.c:2262) 
[ 39.315759][ T355] ? reacquire_held_locks (kernel/locking/lockdep.c:5284) 
[ 39.315941][ T355] ? 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) 
[ 39.316130][ T355] ? __fget_light (./include/linux/atomic/atomic-arch-fallback.h:479 ./include/linux/atomic/atomic-instrumented.h:50 fs/file.c:1145) 
[ 39.316324][ T355] __sys_sendmsg (./include/linux/file.h:34 net/socket.c:2682) 
[ 39.316513][ T355] ? __pfx___sys_sendmsg (net/socket.c:2668) 
[ 39.316704][ T355] ? __pfx___up_read (kernel/locking/rwsem.c:1339) 
[ 39.316907][ T355] do_syscall_64 (arch/x86/entry/common.c:52 arch/x86/entry/common.c:83) 
[ 39.317088][ T355] entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:130) 
[   39.317330][  T355] RIP: 0033:0x7f6934ab97b7
[ 39.317526][ T355] 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)
[   39.318175][  T355] RSP: 002b:00007fffcbe2dc78 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
[   39.318452][  T355] RAX: ffffffffffffffda RBX: 000000000000ffff RCX: 00007f6934ab97b7
[   39.318738][  T355] RDX: 0000000000000000 RSI: 00007fffcbe2dce0 RDI: 0000000000000005
[   39.319019][  T355] RBP: 00007fffcbe2ddd0 R08: 0000000000000034 R09: 0000000000000000
[   39.319298][  T355] R10: 00007f6934972708 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