======================================
| [  608.302510][ T3297] 1 lock held by ip/3297:
| [ 608.302654][ T3297] #0: ffffffff9bdc5cc8 (rtnl_mutex){+.+.}-{3:3}, at: rtnetlink_rcv_msg (net/core/rtnetlink.c:6645) 
| [  608.303010][ T3297]
| [  608.303010][ T3297] stack backtrace:
[  608.303553][ T3297] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[  608.303957][ T3297] Call Trace:
[  608.304096][ T3297]  <TASK>
[ 608.304194][ T3297] dump_stack_lvl (lib/dump_stack.c:122) 
[ 608.304387][ T3297] lockdep_rcu_suspicious (./include/linux/context_tracking.h:153 kernel/locking/lockdep.c:6725) 
[ 608.304568][ T3297] ? __pfx_br_handle_frame (net/bridge/br_input.c:326) bridge
[ 608.304839][ T3297] 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
[ 608.305092][ T3297] br_info_notify (./include/linux/skbuff.h:1320 ./include/net/netlink.h:1015 net/bridge/br_netlink.c:645) bridge
[ 608.305310][ T3297] ? lockdep_hardirqs_on_prepare (kernel/locking/lockdep.c:4299 kernel/locking/lockdep.c:4358) 
[ 608.305537][ T3297] br_add_if (net/bridge/br_if.c:692) bridge
[ 608.305758][ T3297] ? rtnl_is_locked (net/core/rtnetlink.c:164) 
[ 608.305948][ T3297] ? netdev_master_upper_dev_get (net/core/dev.c:7102) 
[ 608.306184][ T3297] do_setlink (net/core/rtnetlink.c:2907) 
[ 608.306384][ T3297] ? is_bpf_text_address (./include/linux/rcupdate.h:336 ./include/linux/rcupdate.h:869 ./kernel/bpf/core.c:769) 
[ 608.306570][ T3297] ? __pfx_do_setlink (net/core/rtnetlink.c:2778) 
[ 608.306756][ T3297] ? is_bpf_text_address (./kernel/bpf/core.c:772) 
[ 608.306935][ T3297] ? kernel_text_address (kernel/extable.c:97 kernel/extable.c:94) 
[ 608.307123][ T3297] ? __kernel_text_address (kernel/extable.c:79) 
[ 608.307305][ T3297] ? unwind_get_return_address (arch/x86/kernel/unwind_orc.c:369 arch/x86/kernel/unwind_orc.c:364) 
[ 608.307488][ T3297] ? __pfx_stack_trace_consume_entry (kernel/stacktrace.c:83) 
[ 608.307734][ T3297] ? arch_stack_walk (arch/x86/kernel/stacktrace.c:26) 
[ 608.307936][ T3297] ? stack_trace_save (kernel/stacktrace.c:123) 
[ 608.308119][ T3297] ? __pfx_stack_trace_save (kernel/stacktrace.c:114) 
[ 608.308311][ T3297] ? __pfx_validate_nla (lib/nlattr.c:396) 
[ 608.308497][ T3297] ? mark_lock (kernel/locking/lockdep.c:4655 (discriminator 3)) 
[ 608.308638][ T3297] ? kasan_save_stack (mm/kasan/common.c:49) 
[ 608.308822][ T3297] ? __nla_validate_parse (lib/nlattr.c:638) 
[ 608.309014][ T3297] __rtnl_newlink (net/core/rtnetlink.c:3696) 
[ 608.309211][ T3297] ? 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) 
[ 608.309407][ T3297] ? __pfx___rtnl_newlink (net/core/rtnetlink.c:3557) 
[ 608.309592][ T3297] ? lockdep_hardirqs_on_prepare (kernel/locking/lockdep.c:4299 kernel/locking/lockdep.c:4358) 
[ 608.309823][ T3297] ? __create_object (mm/kmemleak.c:751) 
[ 608.310005][ T3297] ? trace_kmalloc (./include/trace/events/kmem.h:54 (discriminator 52)) 
[ 608.310192][ T3297] rtnl_newlink (net/core/rtnetlink.c:3744) 
[ 608.310337][ T3297] rtnetlink_rcv_msg (net/core/rtnetlink.c:6647) 
[ 608.310520][ T3297] ? __pfx_rtnetlink_rcv_msg (net/core/rtnetlink.c:6541) 
[ 608.310704][ T3297] ? 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) 
[ 608.310890][ T3297] ? mark_lock (kernel/locking/lockdep.c:4655 (discriminator 3)) 
[ 608.311034][ T3297] ? __lock_acquire (kernel/locking/lockdep.c:5142) 
[ 608.311218][ T3297] netlink_rcv_skb (net/netlink/af_netlink.c:2550) 
[ 608.311402][ T3297] ? __pfx_rtnetlink_rcv_msg (net/core/rtnetlink.c:6541) 
[ 608.311583][ T3297] ? __pfx_netlink_rcv_skb (net/netlink/af_netlink.c:2527) 
[ 608.311776][ T3297] ? netlink_deliver_tap (./include/linux/rcupdate.h:336 ./include/linux/rcupdate.h:869 net/netlink/af_netlink.c:340) 
[ 608.311960][ T3297] ? 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) 
[ 608.312148][ T3297] netlink_unicast (net/netlink/af_netlink.c:1331 net/netlink/af_netlink.c:1357) 
[ 608.312338][ T3297] ? __pfx_netlink_unicast (net/netlink/af_netlink.c:1342) 
[ 608.312526][ T3297] netlink_sendmsg (net/netlink/af_netlink.c:1901) 
[ 608.312711][ T3297] ? __pfx_netlink_sendmsg (net/netlink/af_netlink.c:1820) 
[ 608.312893][ T3297] ? __import_iovec (lib/iov_iter.c:1263 lib/iov_iter.c:1279) 
[ 608.313084][ T3297] ____sys_sendmsg (net/socket.c:730 net/socket.c:745 net/socket.c:2597) 
[ 608.313267][ T3297] ? __pfx_____sys_sendmsg (net/socket.c:2543) 
[ 608.313446][ T3297] ? __pfx_copy_msghdr_from_user (net/socket.c:2523) 
[ 608.313672][ T3297] ? __pfx_validate_chain (kernel/locking/lockdep.c:3824) 
[ 608.313872][ T3297] ___sys_sendmsg (net/socket.c:2653) 
[ 608.314054][ T3297] ? __pfx____sys_sendmsg (net/socket.c:2640) 
[ 608.314236][ T3297] ? find_held_lock (kernel/locking/lockdep.c:5249) 
[ 608.314426][ T3297] ? __lock_release (kernel/locking/lockdep.c:5435) 
[ 608.314611][ T3297] ? __debug_check_no_obj_freed (lib/debugobjects.c:1001) 
[ 608.314838][ T3297] ? __pfx___lock_release (kernel/locking/lockdep.c:5411) 
[ 608.315024][ T3297] ? __pfx_do_raw_spin_lock (kernel/locking/spinlock_debug.c:114) 
[ 608.315220][ T3297] ? lockdep_hardirqs_on_prepare (kernel/locking/lockdep.c:4299 kernel/locking/lockdep.c:4358) 
[ 608.315464][ T3297] ? __fget_light (./include/linux/atomic/atomic-arch-fallback.h:479 ./include/linux/atomic/atomic-instrumented.h:50 fs/file.c:1145) 
[ 608.315651][ T3297] __sys_sendmsg (./include/linux/file.h:34 net/socket.c:2682) 
[ 608.315837][ T3297] ? __pfx___sys_sendmsg (net/socket.c:2668) 
[ 608.316023][ T3297] ? __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) 
[ 608.316225][ T3297] do_syscall_64 (arch/x86/entry/common.c:52 arch/x86/entry/common.c:83) 
[ 608.316410][ T3297] entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:130) 
[  608.316633][ T3297] RIP: 0033:0x7f9242f357b7
[ 608.316822][ T3297] 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)
[  608.317460][ T3297] RSP: 002b:00007ffe56908018 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
[  608.317738][ T3297] RAX: ffffffffffffffda RBX: 00007ffe56908750 RCX: 00007f9242f357b7
[  608.318007][ T3297] RDX: 0000000000000000 RSI: 00007ffe56908080 RDI: 0000000000000005
[  608.318285][ T3297] RBP: 0000000000000003 R08: 0000000000000003 R09: 0000000000000000
[  608.318556][ T3297] R10: 0000000031dd0910 R11: 0000000000000246 R12: 0000000000000003
[  608.318829][ T3297] R13: 0000000066bea1da R14: 0000000000496600 R15: 0000000000000000
| [  608.321056][ T3297] 1 lock held by ip/3297:
| [ 608.321207][ T3297] #0: ffffffff9bdc5cc8 (rtnl_mutex){+.+.}-{3:3}, at: rtnetlink_rcv_msg (net/core/rtnetlink.c:6645) 
| [  608.321540][ T3297]
| [  608.321540][ T3297] stack backtrace:
[  608.322051][ T3297] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[  608.322463][ T3297] Call Trace:
[  608.322603][ T3297]  <TASK>
[ 608.322699][ T3297] dump_stack_lvl (lib/dump_stack.c:122) 
[ 608.322887][ T3297] lockdep_rcu_suspicious (./include/linux/context_tracking.h:153 kernel/locking/lockdep.c:6725) 
[ 608.323071][ T3297] 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
[ 608.323344][ T3297] br_info_notify (./include/linux/skbuff.h:1320 ./include/net/netlink.h:1015 net/bridge/br_netlink.c:645) bridge
[ 608.323554][ T3297] ? lockdep_hardirqs_on_prepare (kernel/locking/lockdep.c:4299 kernel/locking/lockdep.c:4358) 
[ 608.323785][ T3297] br_add_if (net/bridge/br_if.c:692) bridge
[ 608.324002][ T3297] ? rtnl_is_locked (net/core/rtnetlink.c:164) 
[ 608.324187][ T3297] ? netdev_master_upper_dev_get (net/core/dev.c:7102) 
[ 608.324414][ T3297] do_setlink (net/core/rtnetlink.c:2907) 
[ 608.324596][ T3297] ? is_bpf_text_address (./include/linux/rcupdate.h:336 ./include/linux/rcupdate.h:869 ./kernel/bpf/core.c:769) 
[ 608.324778][ T3297] ? __pfx_do_setlink (net/core/rtnetlink.c:2778) 
[ 608.324961][ T3297] ? is_bpf_text_address (./kernel/bpf/core.c:772) 
[ 608.325143][ T3297] ? kernel_text_address (kernel/extable.c:97 kernel/extable.c:94) 
[ 608.325325][ T3297] ? __kernel_text_address (kernel/extable.c:79) 
[ 608.325514][ T3297] ? unwind_get_return_address (arch/x86/kernel/unwind_orc.c:369 arch/x86/kernel/unwind_orc.c:364) 
[ 608.325706][ T3297] ? __pfx_stack_trace_consume_entry (kernel/stacktrace.c:83) 
[ 608.326104][ T3297] ? arch_stack_walk (arch/x86/kernel/stacktrace.c:26) 
[ 608.326297][ T3297] ? stack_trace_save (kernel/stacktrace.c:123) 
[ 608.326477][ T3297] ? __pfx_stack_trace_save (kernel/stacktrace.c:114) 
[ 608.326664][ T3297] ? __pfx_validate_nla (lib/nlattr.c:396) 
[ 608.326941][ T3297] ? mark_lock (kernel/locking/lockdep.c:4655 (discriminator 3)) 
[ 608.327081][ T3297] ? kasan_save_stack (mm/kasan/common.c:49) 
[ 608.327274][ T3297] ? __nla_validate_parse (lib/nlattr.c:638) 
[ 608.327464][ T3297] __rtnl_newlink (net/core/rtnetlink.c:3696) 
[ 608.327852][ T3297] ? 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) 
[ 608.328036][ T3297] ? __pfx___rtnl_newlink (net/core/rtnetlink.c:3557) 
[ 608.328224][ T3297] ? lockdep_hardirqs_on_prepare (kernel/locking/lockdep.c:4299 kernel/locking/lockdep.c:4358) 
[ 608.328451][ T3297] ? __create_object (mm/kmemleak.c:751) 
[ 608.328731][ T3297] ? trace_kmalloc (./include/trace/events/kmem.h:54 (discriminator 52)) 
[ 608.328921][ T3297] rtnl_newlink (net/core/rtnetlink.c:3744) 
[ 608.329069][ T3297] rtnetlink_rcv_msg (net/core/rtnetlink.c:6647) 
[ 608.329255][ T3297] ? __pfx_rtnetlink_rcv_msg (net/core/rtnetlink.c:6541) 
[ 608.329432][ T3297] ? 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) 
[ 608.329710][ T3297] ? mark_lock (kernel/locking/lockdep.c:4655 (discriminator 3)) 
[ 608.329851][ T3297] ? __lock_acquire (kernel/locking/lockdep.c:5142) 
[ 608.330034][ T3297] netlink_rcv_skb (net/netlink/af_netlink.c:2550) 
[ 608.330213][ T3297] ? __pfx_rtnetlink_rcv_msg (net/core/rtnetlink.c:6541) 
[ 608.330491][ T3297] ? __pfx_netlink_rcv_skb (net/netlink/af_netlink.c:2527) 
[ 608.330684][ T3297] ? netlink_deliver_tap (./include/linux/rcupdate.h:336 ./include/linux/rcupdate.h:869 net/netlink/af_netlink.c:340) 
[ 608.330872][ T3297] ? 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) 
[ 608.331057][ T3297] netlink_unicast (net/netlink/af_netlink.c:1331 net/netlink/af_netlink.c:1357) 
[ 608.331344][ T3297] ? __pfx_netlink_unicast (net/netlink/af_netlink.c:1342) 
[ 608.331532][ T3297] netlink_sendmsg (net/netlink/af_netlink.c:1901) 
[ 608.331715][ T3297] ? __pfx_netlink_sendmsg (net/netlink/af_netlink.c:1820) 
[ 608.331905][ T3297] ? __import_iovec (lib/iov_iter.c:1263 lib/iov_iter.c:1279) 
[ 608.332093][ T3297] ____sys_sendmsg (net/socket.c:730 net/socket.c:745 net/socket.c:2597) 
[ 608.332375][ T3297] ? __pfx_____sys_sendmsg (net/socket.c:2543) 
[ 608.332561][ T3297] ? __pfx_copy_msghdr_from_user (net/socket.c:2523) 
[ 608.332783][ T3297] ? __pfx_validate_chain (kernel/locking/lockdep.c:3824) 
[ 608.332976][ T3297] ___sys_sendmsg (net/socket.c:2653) 
[ 608.333161][ T3297] ? __pfx____sys_sendmsg (net/socket.c:2640) 
[ 608.333342][ T3297] ? find_held_lock (kernel/locking/lockdep.c:5249) 
[ 608.333531][ T3297] ? __lock_release (kernel/locking/lockdep.c:5435) 
[ 608.333710][ T3297] ? __debug_check_no_obj_freed (lib/debugobjects.c:1001) 
[ 608.334041][ T3297] ? __pfx___lock_release (kernel/locking/lockdep.c:5411) 
[ 608.334225][ T3297] ? __pfx_do_raw_spin_lock (kernel/locking/spinlock_debug.c:114) 
[ 608.334414][ T3297] ? lockdep_hardirqs_on_prepare (kernel/locking/lockdep.c:4299 kernel/locking/lockdep.c:4358) 
[ 608.334640][ T3297] ? __fget_light (./include/linux/atomic/atomic-arch-fallback.h:479 ./include/linux/atomic/atomic-instrumented.h:50 fs/file.c:1145) 
[ 608.334919][ T3297] __sys_sendmsg (./include/linux/file.h:34 net/socket.c:2682) 
[ 608.335096][ T3297] ? __pfx___sys_sendmsg (net/socket.c:2668) 
[ 608.335274][ T3297] ? __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) 
[ 608.335474][ T3297] do_syscall_64 (arch/x86/entry/common.c:52 arch/x86/entry/common.c:83) 
[ 608.335772][ T3297] entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:130) 
[  608.335996][ T3297] RIP: 0033:0x7f9242f357b7
[ 608.336185][ T3297] 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)
[  608.336910][ T3297] RSP: 002b:00007ffe56908018 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
[  608.337190][ T3297] RAX: ffffffffffffffda RBX: 00007ffe56908750 RCX: 00007f9242f357b7
[  608.337553][ T3297] RDX: 0000000000000000 RSI: 00007ffe56908080 RDI: 0000000000000005
[  608.337821][ T3297] RBP: 0000000000000003 R08: 0000000000000003 R09: 0000000000000000
[  608.338093][ T3297] R10: 0000000031dd0910 R11: 0000000000000246 R12: 0000000000000003


Finger prints:
lockdep_rcu_suspicious:br_get_link_af_size_filtered:br_info_notify:br_add_if:do_setlink