======================================
| [   32.440342][  T306] 1 lock held by ip/306:
| [ 32.440479][ T306] #0: ffffffffb5dbc508 (rtnl_mutex){+.+.}-{3:3}, at: rtnetlink_rcv_msg (net/core/rtnetlink.c:6645) 
| [   32.440796][  T306]
| [   32.440796][  T306] stack backtrace:
[   32.441249][  T306] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[   32.441628][  T306] Call Trace:
[   32.441763][  T306]  <TASK>
[ 32.441851][ T306] dump_stack_lvl (lib/dump_stack.c:122) 
[ 32.442041][ T306] lockdep_rcu_suspicious (./include/linux/context_tracking.h:153 kernel/locking/lockdep.c:6725) 
[ 32.442208][ T306] ? __pfx_br_handle_frame (net/bridge/br_input.c:326) bridge
[ 32.442490][ T306] 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
[ 32.442732][ T306] br_info_notify (./include/linux/skbuff.h:1320 ./include/net/netlink.h:1015 net/bridge/br_netlink.c:645) bridge
[ 32.443123][ T306] ? lockdep_hardirqs_on_prepare (kernel/locking/lockdep.c:4299 kernel/locking/lockdep.c:4358) 
[ 32.443334][ T306] br_add_if (net/bridge/br_if.c:692) bridge
[ 32.443551][ T306] ? rtnl_is_locked (net/core/rtnetlink.c:164) 
[ 32.443717][ T306] ? netdev_master_upper_dev_get (net/core/dev.c:7102) 
[ 32.443931][ T306] do_setlink (net/core/rtnetlink.c:2907) 
[ 32.444101][ T306] ? is_bpf_text_address (./include/linux/rcupdate.h:336 ./include/linux/rcupdate.h:869 ./kernel/bpf/core.c:769) 
[ 32.444275][ T306] ? __pfx_do_setlink (net/core/rtnetlink.c:2778) 
[ 32.444441][ T306] ? is_bpf_text_address (./kernel/bpf/core.c:772) 
[ 32.444605][ T306] ? kernel_text_address (kernel/extable.c:97 kernel/extable.c:94) 
[ 32.444779][ T306] ? __kernel_text_address (kernel/extable.c:79) 
[ 32.444948][ T306] ? unwind_get_return_address (arch/x86/kernel/unwind_orc.c:369 arch/x86/kernel/unwind_orc.c:364) 
[ 32.445112][ T306] ? __pfx_stack_trace_consume_entry (kernel/stacktrace.c:83) 
[ 32.445318][ T306] ? arch_stack_walk (arch/x86/kernel/stacktrace.c:26) 
[ 32.445502][ T306] ? stack_trace_save (kernel/stacktrace.c:123) 
[ 32.445676][ T306] ? __pfx_stack_trace_save (kernel/stacktrace.c:114) 
[ 32.445844][ T306] ? __pfx_validate_nla (lib/nlattr.c:396) 
[ 32.446009][ T306] ? mark_lock (kernel/locking/lockdep.c:4655 (discriminator 3)) 
[ 32.446146][ T306] ? kasan_save_stack (mm/kasan/common.c:49) 
[ 32.446327][ T306] ? __nla_validate_parse (lib/nlattr.c:638) 
[ 32.446502][ T306] __rtnl_newlink (net/core/rtnetlink.c:3696) 
[ 32.446674][ T306] ? 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) 
[ 32.446846][ T306] ? __pfx___rtnl_newlink (net/core/rtnetlink.c:3557) 
[ 32.447022][ T306] ? lockdep_hardirqs_on_prepare (kernel/locking/lockdep.c:4299 kernel/locking/lockdep.c:4358) 
[ 32.447234][ T306] ? __create_object (mm/kmemleak.c:751) 
[ 32.447402][ T306] ? trace_kmalloc (./include/trace/events/kmem.h:54 (discriminator 52)) 
[ 32.447575][ T306] rtnl_newlink (net/core/rtnetlink.c:3744) 
[ 32.447708][ T306] rtnetlink_rcv_msg (net/core/rtnetlink.c:6647) 
[ 32.447891][ T306] ? __pfx_rtnetlink_rcv_msg (net/core/rtnetlink.c:6541) 
[ 32.448061][ T306] ? 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) 
[ 32.448234][ T306] ? mark_lock (kernel/locking/lockdep.c:4655 (discriminator 3)) 
[ 32.448366][ T306] ? __lock_acquire (kernel/locking/lockdep.c:5142) 
[ 32.448535][ T306] netlink_rcv_skb (net/netlink/af_netlink.c:2550) 
[ 32.448700][ T306] ? __pfx_rtnetlink_rcv_msg (net/core/rtnetlink.c:6541) 
[ 32.448870][ T306] ? __pfx_netlink_rcv_skb (net/netlink/af_netlink.c:2527) 
[ 32.449055][ T306] ? netlink_deliver_tap (./include/linux/rcupdate.h:336 ./include/linux/rcupdate.h:869 net/netlink/af_netlink.c:340) 
[ 32.449230][ T306] ? 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) 
[ 32.449400][ T306] netlink_unicast (net/netlink/af_netlink.c:1331 net/netlink/af_netlink.c:1357) 
[ 32.449568][ T306] ? __pfx_netlink_unicast (net/netlink/af_netlink.c:1342) 
[ 32.449735][ T306] ? find_held_lock (kernel/locking/lockdep.c:5249) 
[ 32.449913][ T306] netlink_sendmsg (net/netlink/af_netlink.c:1901) 
[ 32.450084][ T306] ? __pfx_netlink_sendmsg (net/netlink/af_netlink.c:1820) 
[ 32.450247][ T306] ? __might_fault (mm/memory.c:6388 mm/memory.c:6381) 
[ 32.450422][ T306] ? __import_iovec (lib/iov_iter.c:1263 lib/iov_iter.c:1279) 
[ 32.450601][ T306] ____sys_sendmsg (net/socket.c:730 net/socket.c:745 net/socket.c:2597) 
[ 32.450769][ T306] ? __pfx_____sys_sendmsg (net/socket.c:2543) 
[ 32.450931][ T306] ? __pfx_copy_msghdr_from_user (net/socket.c:2523) 
[ 32.451136][ T306] ? __pfx_validate_chain (kernel/locking/lockdep.c:3824) 
[ 32.451313][ T306] ___sys_sendmsg (net/socket.c:2653) 
[ 32.451487][ T306] ? __pfx____sys_sendmsg (net/socket.c:2640) 
[ 32.451652][ T306] ? find_held_lock (kernel/locking/lockdep.c:5249) 
[ 32.451845][ T306] ? __lock_release (kernel/locking/lockdep.c:5435) 
[ 32.452011][ T306] ? __debug_check_no_obj_freed (lib/debugobjects.c:1001) 
[ 32.452219][ T306] ? __pfx___lock_release (kernel/locking/lockdep.c:5411) 
[ 32.452385][ T306] ? __pfx_do_raw_spin_lock (kernel/locking/spinlock_debug.c:114) 
[ 32.452565][ T306] ? lockdep_hardirqs_on_prepare (kernel/locking/lockdep.c:4299 kernel/locking/lockdep.c:4358) 
[ 32.452771][ T306] ? __fget_light (./include/linux/atomic/atomic-arch-fallback.h:479 ./include/linux/atomic/atomic-instrumented.h:50 fs/file.c:1145) 
[ 32.452944][ T306] __sys_sendmsg (./include/linux/file.h:34 net/socket.c:2682) 
[ 32.453111][ T306] ? __pfx___sys_sendmsg (net/socket.c:2668) 
[ 32.453284][ T306] ? __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) 
[ 32.453471][ T306] do_syscall_64 (arch/x86/entry/common.c:52 arch/x86/entry/common.c:83) 
[ 32.453639][ T306] entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:130) 
[   32.453843][  T306] RIP: 0033:0x7f67649777b7
[ 32.454016][ T306] 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)
[   32.454599][  T306] RSP: 002b:00007ffde0c3d0c8 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
[   32.454853][  T306] RAX: ffffffffffffffda RBX: 00007ffde0c3d7f0 RCX: 00007f67649777b7
[   32.455101][  T306] RDX: 0000000000000000 RSI: 00007ffde0c3d130 RDI: 0000000000000005
[   32.455346][  T306] RBP: 0000000000000004 R08: 0000000000000003 R09: 0000000000000000
[   32.455604][  T306] R10: 000000001fef3910 R11: 0000000000000246 R12: 0000000000000004
[   32.455858][  T306] R13: 0000000066bea7d1 R14: 0000000000496600 R15: 0000000000000000
| [   32.458124][  T306] 1 lock held by ip/306:
| [ 32.458252][ T306] #0: ffffffffb5dbc508 (rtnl_mutex){+.+.}-{3:3}, at: rtnetlink_rcv_msg (net/core/rtnetlink.c:6645) 
| [   32.458685][  T306]
| [   32.458685][  T306] stack backtrace:
[   32.459140][  T306] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[   32.459511][  T306] Call Trace:
[   32.459638][  T306]  <TASK>
[ 32.459737][ T306] dump_stack_lvl (lib/dump_stack.c:122) 
[ 32.459918][ T306] lockdep_rcu_suspicious (./include/linux/context_tracking.h:153 kernel/locking/lockdep.c:6725) 
[ 32.460088][ T306] ? __pfx_br_handle_frame (net/bridge/br_input.c:326) bridge
[ 32.460335][ T306] 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
[ 32.460583][ T306] br_info_notify (./include/linux/skbuff.h:1320 ./include/net/netlink.h:1015 net/bridge/br_netlink.c:645) bridge
[ 32.460785][ T306] ? lockdep_hardirqs_on_prepare (kernel/locking/lockdep.c:4299 kernel/locking/lockdep.c:4358) 
[ 32.461000][ T306] br_add_if (net/bridge/br_if.c:692) bridge
[ 32.461199][ T306] ? rtnl_is_locked (net/core/rtnetlink.c:164) 
[ 32.461374][ T306] ? netdev_master_upper_dev_get (net/core/dev.c:7102) 
[ 32.461587][ T306] do_setlink (net/core/rtnetlink.c:2907) 
[ 32.461755][ T306] ? is_bpf_text_address (./include/linux/rcupdate.h:336 ./include/linux/rcupdate.h:869 ./kernel/bpf/core.c:769) 
[ 32.461929][ T306] ? __pfx_do_setlink (net/core/rtnetlink.c:2778) 
[ 32.462098][ T306] ? is_bpf_text_address (./kernel/bpf/core.c:772) 
[ 32.462265][ T306] ? kernel_text_address (kernel/extable.c:97 kernel/extable.c:94) 
[ 32.462437][ T306] ? __kernel_text_address (kernel/extable.c:79) 
[ 32.462602][ T306] ? unwind_get_return_address (arch/x86/kernel/unwind_orc.c:369 arch/x86/kernel/unwind_orc.c:364) 
[ 32.462766][ T306] ? __pfx_stack_trace_consume_entry (kernel/stacktrace.c:83) 
[ 32.462987][ T306] ? arch_stack_walk (arch/x86/kernel/stacktrace.c:26) 
[ 32.463168][ T306] ? stack_trace_save (kernel/stacktrace.c:123) 
[ 32.463340][ T306] ? __pfx_stack_trace_save (kernel/stacktrace.c:114) 
[ 32.463504][ T306] ? __pfx_validate_nla (lib/nlattr.c:396) 
[ 32.463677][ T306] ? mark_lock (kernel/locking/lockdep.c:4655 (discriminator 3)) 
[ 32.463806][ T306] ? kasan_save_stack (mm/kasan/common.c:49) 
[ 32.463981][ T306] ? __nla_validate_parse (lib/nlattr.c:638) 
[ 32.464166][ T306] __rtnl_newlink (net/core/rtnetlink.c:3696) 
[ 32.464349][ T306] ? 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) 
[ 32.464532][ T306] ? __pfx___rtnl_newlink (net/core/rtnetlink.c:3557) 
[ 32.464709][ T306] ? lockdep_hardirqs_on_prepare (kernel/locking/lockdep.c:4299 kernel/locking/lockdep.c:4358) 
[ 32.464920][ T306] ? __create_object (mm/kmemleak.c:751) 
[ 32.465090][ T306] ? trace_kmalloc (./include/trace/events/kmem.h:54 (discriminator 52)) 
[ 32.465265][ T306] rtnl_newlink (net/core/rtnetlink.c:3744) 
[ 32.465400][ T306] rtnetlink_rcv_msg (net/core/rtnetlink.c:6647) 
[ 32.465577][ T306] ? __pfx_rtnetlink_rcv_msg (net/core/rtnetlink.c:6541) 
[ 32.465746][ T306] ? 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) 
[ 32.465913][ T306] ? mark_lock (kernel/locking/lockdep.c:4655 (discriminator 3)) 
[ 32.466044][ T306] ? __lock_acquire (kernel/locking/lockdep.c:5142) 
[ 32.466216][ T306] netlink_rcv_skb (net/netlink/af_netlink.c:2550) 
[ 32.466383][ T306] ? __pfx_rtnetlink_rcv_msg (net/core/rtnetlink.c:6541) 
[ 32.466558][ T306] ? __pfx_netlink_rcv_skb (net/netlink/af_netlink.c:2527) 
[ 32.466746][ T306] ? netlink_deliver_tap (./include/linux/rcupdate.h:336 ./include/linux/rcupdate.h:869 net/netlink/af_netlink.c:340) 
[ 32.466920][ T306] ? 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) 
[ 32.467097][ T306] netlink_unicast (net/netlink/af_netlink.c:1331 net/netlink/af_netlink.c:1357) 
[ 32.467271][ T306] ? __pfx_netlink_unicast (net/netlink/af_netlink.c:1342) 
[ 32.467442][ T306] ? find_held_lock (kernel/locking/lockdep.c:5249) 
[ 32.467625][ T306] netlink_sendmsg (net/netlink/af_netlink.c:1901) 
[ 32.467807][ T306] ? __pfx_netlink_sendmsg (net/netlink/af_netlink.c:1820) 
[ 32.467992][ T306] ? __might_fault (mm/memory.c:6388 mm/memory.c:6381) 
[ 32.468164][ T306] ? __import_iovec (lib/iov_iter.c:1263 lib/iov_iter.c:1279) 
[ 32.468343][ T306] ____sys_sendmsg (net/socket.c:730 net/socket.c:745 net/socket.c:2597) 
[ 32.468511][ T306] ? __pfx_____sys_sendmsg (net/socket.c:2543) 
[ 32.468680][ T306] ? __pfx_copy_msghdr_from_user (net/socket.c:2523) 
[ 32.468890][ T306] ? __pfx_validate_chain (kernel/locking/lockdep.c:3824) 
[ 32.469066][ T306] ___sys_sendmsg (net/socket.c:2653) 
[ 32.469233][ T306] ? __pfx____sys_sendmsg (net/socket.c:2640) 
[ 32.469411][ T306] ? find_held_lock (kernel/locking/lockdep.c:5249) 
[ 32.469581][ T306] ? __lock_release (kernel/locking/lockdep.c:5435) 
[ 32.469743][ T306] ? __debug_check_no_obj_freed (lib/debugobjects.c:1001) 
[ 32.469956][ T306] ? __pfx___lock_release (kernel/locking/lockdep.c:5411) 
[ 32.470128][ T306] ? __pfx_do_raw_spin_lock (kernel/locking/spinlock_debug.c:114) 
[ 32.470303][ T306] ? lockdep_hardirqs_on_prepare (kernel/locking/lockdep.c:4299 kernel/locking/lockdep.c:4358) 
[ 32.470509][ T306] ? __fget_light (./include/linux/atomic/atomic-arch-fallback.h:479 ./include/linux/atomic/atomic-instrumented.h:50 fs/file.c:1145) 
[ 32.470681][ T306] __sys_sendmsg (./include/linux/file.h:34 net/socket.c:2682) 
[ 32.470846][ T306] ? __pfx___sys_sendmsg (net/socket.c:2668) 
[ 32.471012][ T306] ? __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) 
[ 32.471199][ T306] do_syscall_64 (arch/x86/entry/common.c:52 arch/x86/entry/common.c:83) 
[ 32.471372][ T306] entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:130) 
[   32.471577][  T306] RIP: 0033:0x7f67649777b7
[ 32.471751][ T306] 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)
[   32.472334][  T306] RSP: 002b:00007ffde0c3d0c8 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
[   32.472586][  T306] RAX: ffffffffffffffda RBX: 00007ffde0c3d7f0 RCX: 00007f67649777b7
[   32.472833][  T306] RDX: 0000000000000000 RSI: 00007ffde0c3d130 RDI: 0000000000000005
[   32.473081][  T306] RBP: 0000000000000004 R08: 0000000000000003 R09: 0000000000000000
[   32.473325][  T306] R10: 000000001fef3910 R11: 0000000000000246 R12: 0000000000000004
[   32.473578][  T306] R13: 0000000066bea7d1 R14: 0000000000496600 R15: 0000000000000000
| [   32.475871][  T306] 1 lock held by ip/306:
| [ 32.475999][ T306] #0: ffffffffb5dbc508 (rtnl_mutex){+.+.}-{3:3}, at: rtnetlink_rcv_msg (net/core/rtnetlink.c:6645) 
| [   32.476336][  T306]
| [   32.476336][  T306] stack backtrace:
[   32.476797][  T306] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[   32.477166][  T306] Call Trace:
[   32.477296][  T306]  <TASK>
[ 32.477383][ T306] dump_stack_lvl (lib/dump_stack.c:122) 
[ 32.477556][ T306] lockdep_rcu_suspicious (./include/linux/context_tracking.h:153 kernel/locking/lockdep.c:6725) 
[ 32.477724][ T306] ? __pfx_br_handle_frame (net/bridge/br_input.c:326) bridge
[ 32.477981][ T306] 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
[ 32.478227][ T306] br_info_notify (./include/linux/skbuff.h:1320 ./include/net/netlink.h:1015 net/bridge/br_netlink.c:645) bridge
[ 32.478426][ T306] ? lockdep_hardirqs_on_prepare (kernel/locking/lockdep.c:4299 kernel/locking/lockdep.c:4358) 
[ 32.478632][ T306] br_add_if (net/bridge/br_if.c:692) bridge
[ 32.478832][ T306] ? rtnl_is_locked (net/core/rtnetlink.c:164) 
[ 32.478996][ T306] ? netdev_master_upper_dev_get (net/core/dev.c:7102) 
[ 32.479213][ T306] do_setlink (net/core/rtnetlink.c:2907) 
[ 32.479383][ T306] ? is_bpf_text_address (./include/linux/rcupdate.h:336 ./include/linux/rcupdate.h:869 ./kernel/bpf/core.c:769) 
[ 32.479558][ T306] ? __pfx_do_setlink (net/core/rtnetlink.c:2778) 
[ 32.479724][ T306] ? is_bpf_text_address (./kernel/bpf/core.c:772) 
[ 32.479899][ T306] ? kernel_text_address (kernel/extable.c:97 kernel/extable.c:94) 
[ 32.480073][ T306] ? __kernel_text_address (kernel/extable.c:79) 
[ 32.480244][ T306] ? unwind_get_return_address (arch/x86/kernel/unwind_orc.c:369 arch/x86/kernel/unwind_orc.c:364) 
[ 32.480406][ T306] ? __pfx_stack_trace_consume_entry (kernel/stacktrace.c:83) 
[ 32.480616][ T306] ? arch_stack_walk (arch/x86/kernel/stacktrace.c:26) 
[ 32.480799][ T306] ? stack_trace_save (kernel/stacktrace.c:123) 
[ 32.480970][ T306] ? __pfx_stack_trace_save (kernel/stacktrace.c:114) 
[ 32.481403][ T306] ? __pfx_validate_nla (lib/nlattr.c:396) 
[ 32.481583][ T306] ? mark_lock (kernel/locking/lockdep.c:4655 (discriminator 3)) 
[ 32.481715][ T306] ? kasan_save_stack (mm/kasan/common.c:49) 
[ 32.481899][ T306] ? __nla_validate_parse (lib/nlattr.c:638) 
[ 32.482072][ T306] __rtnl_newlink (net/core/rtnetlink.c:3696) 
[ 32.482247][ T306] ? 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) 
[ 32.482413][ T306] ? __pfx___rtnl_newlink (net/core/rtnetlink.c:3557) 
[ 32.482591][ T306] ? lockdep_hardirqs_on_prepare (kernel/locking/lockdep.c:4299 kernel/locking/lockdep.c:4358) 
[ 32.482902][ T306] ? __create_object (mm/kmemleak.c:751) 
[ 32.483088][ T306] ? trace_kmalloc (./include/trace/events/kmem.h:54 (discriminator 52)) 
[ 32.483260][ T306] rtnl_newlink (net/core/rtnetlink.c:3744) 
[ 32.483405][ T306] rtnetlink_rcv_msg (net/core/rtnetlink.c:6647) 
[ 32.483572][ T306] ? __pfx_rtnetlink_rcv_msg (net/core/rtnetlink.c:6541) 
[ 32.483833][ T306] ? 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) 
[ 32.484010][ T306] ? mark_lock (kernel/locking/lockdep.c:4655 (discriminator 3)) 
[ 32.484140][ T306] ? __lock_acquire (kernel/locking/lockdep.c:5142) 
[ 32.484321][ T306] netlink_rcv_skb (net/netlink/af_netlink.c:2550) 
[ 32.484586][ T306] ? __pfx_rtnetlink_rcv_msg (net/core/rtnetlink.c:6541) 
[ 32.484752][ T306] ? __pfx_netlink_rcv_skb (net/netlink/af_netlink.c:2527) 
[ 32.484932][ T306] ? netlink_deliver_tap (./include/linux/rcupdate.h:336 ./include/linux/rcupdate.h:869 net/netlink/af_netlink.c:340) 
[ 32.485099][ T306] ? 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) 
[ 32.485266][ T306] netlink_unicast (net/netlink/af_netlink.c:1331 net/netlink/af_netlink.c:1357) 
[ 32.485435][ T306] ? __pfx_netlink_unicast (net/netlink/af_netlink.c:1342) 
[ 32.485600][ T306] ? find_held_lock (kernel/locking/lockdep.c:5249) 
[ 32.485775][ T306] netlink_sendmsg (net/netlink/af_netlink.c:1901) 
[ 32.485947][ T306] ? __pfx_netlink_sendmsg (net/netlink/af_netlink.c:1820) 
[ 32.486205][ T306] ? __might_fault (mm/memory.c:6388 mm/memory.c:6381) 
[ 32.486373][ T306] ? __import_iovec (lib/iov_iter.c:1263 lib/iov_iter.c:1279) 
[ 32.486546][ T306] ____sys_sendmsg (net/socket.c:730 net/socket.c:745 net/socket.c:2597) 
[ 32.486713][ T306] ? __pfx_____sys_sendmsg (net/socket.c:2543) 
[ 32.486972][ T306] ? __pfx_copy_msghdr_from_user (net/socket.c:2523) 
[ 32.487175][ T306] ? __pfx_validate_chain (kernel/locking/lockdep.c:3824) 
[ 32.487359][ T306] ___sys_sendmsg (net/socket.c:2653) 
[ 32.487526][ T306] ? __pfx____sys_sendmsg (net/socket.c:2640) 
[ 32.487787][ T306] ? find_held_lock (kernel/locking/lockdep.c:5249) 
[ 32.487971][ T306] ? __lock_release (kernel/locking/lockdep.c:5435) 
[ 32.488135][ T306] ? __debug_check_no_obj_freed (lib/debugobjects.c:1001) 
[ 32.488340][ T306] ? __pfx___lock_release (kernel/locking/lockdep.c:5411) 
[ 32.488603][ T306] ? __pfx_do_raw_spin_lock (kernel/locking/spinlock_debug.c:114) 
[ 32.488774][ T306] ? lockdep_hardirqs_on_prepare (kernel/locking/lockdep.c:4299 kernel/locking/lockdep.c:4358) 
[ 32.488984][ T306] ? __fget_light (./include/linux/atomic/atomic-arch-fallback.h:479 ./include/linux/atomic/atomic-instrumented.h:50 fs/file.c:1145) 
[ 32.489159][ T306] __sys_sendmsg (./include/linux/file.h:34 net/socket.c:2682) 
[ 32.489428][ T306] ? __pfx___sys_sendmsg (net/socket.c:2668) 
[ 32.489604][ T306] ? __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) 
[ 32.489790][ T306] do_syscall_64 (arch/x86/entry/common.c:52 arch/x86/entry/common.c:83) 
[ 32.489957][ T306] entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:130) 
[   32.490163][  T306] RIP: 0033:0x7f67649777b7
[ 32.490343][ T306] 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)
[   32.490914][  T306] RSP: 002b:00007ffde0c3d0c8 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
[   32.491163][  T306] RAX: ffffffffffffffda RBX: 00007ffde0c3d7f0 RCX: 00007f67649777b7
[   32.491407][  T306] RDX: 0000000000000000 RSI: 00007ffde0c3d130 RDI: 0000000000000005
[   32.491755][  T306] RBP: 0000000000000004 R08: 0000000000000003 R09: 0000000000000000
[   32.492002][  T306] R10: 000000001fef3910 R11: 0000000000000246 R12: 0000000000000004
[   32.492247][  T306] R13: 0000000066bea7d1 R14: 0000000000496600 R15: 0000000000000000
| [   33.265511][  T311] 1 lock held by bridge/311:
| [ 33.265706][ T311] #0: ffffffffb5dbc508 (rtnl_mutex){+.+.}-{3:3}, at: rtnetlink_rcv_msg (net/core/rtnetlink.c:6645) 
| [   33.266034][  T311]
| [   33.266034][  T311] stack backtrace:
[   33.266514][  T311] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[   33.266921][  T311] Call Trace:
[   33.267057][  T311]  <TASK>
[ 33.267150][ T311] dump_stack_lvl (lib/dump_stack.c:122) 
[ 33.267334][ T311] lockdep_rcu_suspicious (./include/linux/context_tracking.h:153 kernel/locking/lockdep.c:6725) 
[ 33.267513][ T311] 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
[ 33.267785][ T311] br_info_notify (./include/linux/skbuff.h:1320 ./include/net/netlink.h:1015 net/bridge/br_netlink.c:645) bridge
[ 33.268002][ T311] br_setlink (net/bridge/br_netlink.c:669 net/bridge/br_netlink.c:1136) bridge
[ 33.268217][ T311] ? __pfx_br_setlink (net/bridge/br_netlink.c:1085) bridge
[ 33.268429][ T311] ? lock_acquire.part.0 (kernel/locking/lockdep.c:466 kernel/locking/lockdep.c:5761) 
[ 33.268615][ T311] ? rtnetlink_rcv_msg (net/core/rtnetlink.c:6645) 
[ 33.268795][ T311] ? 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) 
[ 33.268973][ T311] ? __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) 
[ 33.269151][ T311] ? __pfx___mutex_trylock_common (kernel/locking/mutex.c:104) 
[ 33.269369][ T311] ? rtnetlink_rcv_msg (net/core/rtnetlink.c:6645) 
[ 33.269546][ T311] ? lock_acquire (kernel/locking/lockdep.c:5732) 
[ 33.269733][ T311] ? trace_contention_end (./include/trace/events/lock.h:122 (discriminator 52)) 
[ 33.269910][ T311] ? __mutex_lock (./arch/x86/include/asm/preempt.h:94 kernel/locking/mutex.c:618 kernel/locking/mutex.c:752) 
[ 33.270086][ T311] ? find_held_lock (kernel/locking/lockdep.c:5249) 
[ 33.270262][ T311] ? rtnetlink_rcv_msg (net/core/rtnetlink.c:6645) 
[ 33.270437][ T311] ? __pfx___mutex_lock (kernel/locking/mutex.c:751) 
[ 33.270625][ T311] ? __pfx___lock_release (kernel/locking/lockdep.c:5411) 
[ 33.270805][ T311] ? __pfx_lock_acquire.part.0 (kernel/locking/lockdep.c:5724) 
[ 33.270985][ T311] ? trace_lock_acquire (./include/trace/events/lock.h:24 (discriminator 52)) 
[ 33.271166][ T311] rtnl_bridge_setlink (net/core/rtnetlink.c:5225) 
[ 33.271346][ T311] rtnetlink_rcv_msg (net/core/rtnetlink.c:6647) 
[ 33.271538][ T311] ? __pfx_rtnetlink_rcv_msg (net/core/rtnetlink.c:6541) 
[ 33.271728][ T311] ? 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) 
[ 33.271903][ T311] ? mark_lock (kernel/locking/lockdep.c:4655 (discriminator 3)) 
[ 33.272041][ T311] ? __lock_acquire (kernel/locking/lockdep.c:5142) 
[ 33.272222][ T311] netlink_rcv_skb (net/netlink/af_netlink.c:2550) 
[ 33.272402][ T311] ? __pfx_rtnetlink_rcv_msg (net/core/rtnetlink.c:6541) 
[ 33.272581][ T311] ? __pfx_netlink_rcv_skb (net/netlink/af_netlink.c:2527) 
[ 33.272847][ T311] ? netlink_deliver_tap (./include/linux/rcupdate.h:336 ./include/linux/rcupdate.h:869 net/netlink/af_netlink.c:340) 
[ 33.273028][ T311] ? 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) 
[ 33.273207][ T311] netlink_unicast (net/netlink/af_netlink.c:1331 net/netlink/af_netlink.c:1357) 
[ 33.273401][ T311] ? __pfx_netlink_unicast (net/netlink/af_netlink.c:1342) 
[ 33.273579][ T311] ? find_held_lock (kernel/locking/lockdep.c:5249) 
[ 33.273787][ T311] netlink_sendmsg (net/netlink/af_netlink.c:1901) 
[ 33.273973][ T311] ? __pfx_netlink_sendmsg (net/netlink/af_netlink.c:1820) 
[ 33.274159][ T311] ? __might_fault (mm/memory.c:6388 mm/memory.c:6381) 
[ 33.274340][ T311] ? __import_iovec (lib/iov_iter.c:1263 lib/iov_iter.c:1279) 
[ 33.274537][ T311] ____sys_sendmsg (net/socket.c:730 net/socket.c:745 net/socket.c:2597) 
[ 33.274731][ T311] ? __pfx_____sys_sendmsg (net/socket.c:2543) 
[ 33.274905][ T311] ? __pfx_copy_msghdr_from_user (net/socket.c:2523) 
[ 33.275123][ T311] ? 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) 
[ 33.275308][ T311] ? validate_chain (./include/linux/hash.h:78 kernel/locking/lockdep.c:3758 kernel/locking/lockdep.c:3781 kernel/locking/lockdep.c:3836) 
[ 33.275495][ T311] ___sys_sendmsg (net/socket.c:2653) 
[ 33.275702][ T311] ? __pfx_validate_chain (kernel/locking/lockdep.c:3824) 
[ 33.275878][ T311] ? __pfx____sys_sendmsg (net/socket.c:2640) 
[ 33.276059][ T311] ? __lock_acquire (kernel/locking/lockdep.c:5142) 
[ 33.276263][ T311] ? find_held_lock (kernel/locking/lockdep.c:5249) 
[ 33.276441][ T311] ? __lock_release (kernel/locking/lockdep.c:5435) 
[ 33.276641][ T311] ? __fget_light (./include/linux/atomic/atomic-arch-fallback.h:479 ./include/linux/atomic/atomic-instrumented.h:50 fs/file.c:1145) 
[ 33.276818][ T311] ? trace_lock_acquire (./include/trace/events/lock.h:24 (discriminator 52)) 
[ 33.277001][ T311] __sys_sendmsg (./include/linux/file.h:34 net/socket.c:2682) 
[ 33.277193][ T311] ? __pfx___sys_sendmsg (net/socket.c:2668) 
[ 33.277402][ T311] do_syscall_64 (arch/x86/entry/common.c:52 arch/x86/entry/common.c:83) 
[ 33.277588][ T311] entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:130) 
[   33.277844][  T311] RIP: 0033:0x7f29257497b7
[ 33.278041][ T311] 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)
[   33.278670][  T311] RSP: 002b:00007fffc7fc3808 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
[   33.278952][  T311] RAX: ffffffffffffffda RBX: 000000000000ffff RCX: 00007f29257497b7
[   33.279224][  T311] RDX: 0000000000000000 RSI: 00007fffc7fc3870 RDI: 0000000000000005
[   33.279487][  T311] RBP: 00007fffc7fc3960 R08: 0000000000000034 R09: 0000000000000000
[   33.279824][  T311] R10: 00007f2925602708 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_add_if:do_setlink