======================================
| [  341.350449][ T2270] 1 lock held by ip/2270:
| [ 341.350587][ T2270] #0: ffffffff91bc5cc8 (rtnl_mutex){+.+.}-{3:3}, at: rtnetlink_rcv_msg (net/core/rtnetlink.c:6645) 
| [  341.350917][ T2270]
| [  341.350917][ T2270] stack backtrace:
[  341.351384][ T2270] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[  341.351790][ T2270] Call Trace:
[  341.351937][ T2270]  <TASK>
[ 341.352028][ T2270] dump_stack_lvl (lib/dump_stack.c:122) 
[ 341.352223][ T2270] lockdep_rcu_suspicious (./include/linux/context_tracking.h:153 kernel/locking/lockdep.c:6725) 
[ 341.352394][ T2270] ? __pfx_br_handle_frame (net/bridge/br_input.c:326) bridge
[ 341.352660][ T2270] 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
[ 341.352924][ T2270] br_info_notify (./include/linux/skbuff.h:1320 ./include/net/netlink.h:1015 net/bridge/br_netlink.c:645) bridge
[ 341.353144][ T2270] ? lockdep_hardirqs_on_prepare (kernel/locking/lockdep.c:4299 kernel/locking/lockdep.c:4358) 
[ 341.353366][ T2270] br_add_if (net/bridge/br_if.c:692) bridge
[ 341.353576][ T2270] ? rtnl_is_locked (net/core/rtnetlink.c:164) 
[ 341.353762][ T2270] ? netdev_master_upper_dev_get (net/core/dev.c:7102) 
[ 341.353992][ T2270] do_setlink (net/core/rtnetlink.c:2907) 
[ 341.354181][ T2270] ? is_bpf_text_address (./include/linux/rcupdate.h:336 ./include/linux/rcupdate.h:869 ./kernel/bpf/core.c:769) 
[ 341.354353][ T2270] ? __pfx_do_setlink (net/core/rtnetlink.c:2778) 
[ 341.354548][ T2270] ? is_bpf_text_address (./kernel/bpf/core.c:772) 
[ 341.354744][ T2270] ? kernel_text_address (kernel/extable.c:97 kernel/extable.c:94) 
[ 341.354927][ T2270] ? __kernel_text_address (kernel/extable.c:79) 
[ 341.355100][ T2270] ? unwind_get_return_address (arch/x86/kernel/unwind_orc.c:369 arch/x86/kernel/unwind_orc.c:364) 
[ 341.355274][ T2270] ? __pfx_stack_trace_consume_entry (kernel/stacktrace.c:83) 
[ 341.355503][ T2270] ? arch_stack_walk (arch/x86/kernel/stacktrace.c:26) 
[ 341.355687][ T2270] ? stack_trace_save (kernel/stacktrace.c:123) 
[ 341.355891][ T2270] ? __pfx_stack_trace_save (kernel/stacktrace.c:114) 
[ 341.356069][ T2270] ? __pfx_validate_nla (lib/nlattr.c:396) 
[ 341.356262][ T2270] ? mark_lock (kernel/locking/lockdep.c:4655 (discriminator 3)) 
[ 341.356395][ T2270] ? kasan_save_stack (mm/kasan/common.c:49) 
[ 341.356582][ T2270] ? __nla_validate_parse (lib/nlattr.c:638) 
[ 341.356757][ T2270] __rtnl_newlink (net/core/rtnetlink.c:3696) 
[ 341.357055][ T2270] ? 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) 
[ 341.357248][ T2270] ? __pfx___rtnl_newlink (net/core/rtnetlink.c:3557) 
[ 341.357440][ T2270] ? lockdep_hardirqs_on_prepare (kernel/locking/lockdep.c:4299 kernel/locking/lockdep.c:4358) 
[ 341.357679][ T2270] ? __create_object (mm/kmemleak.c:751) 
[ 341.357874][ T2270] ? trace_kmalloc (./include/trace/events/kmem.h:54 (discriminator 52)) 
[ 341.358063][ T2270] rtnl_newlink (net/core/rtnetlink.c:3744) 
[ 341.358197][ T2270] rtnetlink_rcv_msg (net/core/rtnetlink.c:6647) 
[ 341.358379][ T2270] ? __pfx_rtnetlink_rcv_msg (net/core/rtnetlink.c:6541) 
[ 341.358553][ T2270] ? 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) 
[ 341.358727][ T2270] ? mark_lock (kernel/locking/lockdep.c:4655 (discriminator 3)) 
[ 341.358884][ T2270] ? __lock_acquire (kernel/locking/lockdep.c:5142) 
[ 341.359056][ T2270] netlink_rcv_skb (net/netlink/af_netlink.c:2550) 
[ 341.359238][ T2270] ? __pfx_rtnetlink_rcv_msg (net/core/rtnetlink.c:6541) 
[ 341.359416][ T2270] ? __pfx_netlink_rcv_skb (net/netlink/af_netlink.c:2527) 
[ 341.359597][ T2270] ? netlink_deliver_tap (./include/linux/rcupdate.h:336 ./include/linux/rcupdate.h:869 net/netlink/af_netlink.c:340) 
[ 341.359771][ T2270] ? 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) 
[ 341.359955][ T2270] netlink_unicast (net/netlink/af_netlink.c:1331 net/netlink/af_netlink.c:1357) 
[ 341.360145][ T2270] ? __pfx_netlink_unicast (net/netlink/af_netlink.c:1342) 
[ 341.360324][ T2270] netlink_sendmsg (net/netlink/af_netlink.c:1901) 
[ 341.360502][ T2270] ? __pfx_netlink_sendmsg (net/netlink/af_netlink.c:1820) 
[ 341.360692][ T2270] ? __import_iovec (lib/iov_iter.c:1263 lib/iov_iter.c:1279) 
[ 341.360878][ T2270] ____sys_sendmsg (net/socket.c:730 net/socket.c:745 net/socket.c:2597) 
[ 341.361072][ T2270] ? __pfx_____sys_sendmsg (net/socket.c:2543) 
[ 341.361241][ T2270] ? __pfx_copy_msghdr_from_user (net/socket.c:2523) 
[ 341.361458][ T2270] ? __pfx_validate_chain (kernel/locking/lockdep.c:3824) 
[ 341.361650][ T2270] ___sys_sendmsg (net/socket.c:2653) 
[ 341.361840][ T2270] ? __pfx____sys_sendmsg (net/socket.c:2640) 
[ 341.362031][ T2270] ? find_held_lock (kernel/locking/lockdep.c:5249) 
[ 341.362211][ T2270] ? __lock_release (kernel/locking/lockdep.c:5435) 
[ 341.362386][ T2270] ? __debug_check_no_obj_freed (lib/debugobjects.c:1001) 
[ 341.362827][ T2270] ? __pfx___lock_release (kernel/locking/lockdep.c:5411) 
[ 341.363000][ T2270] ? __pfx_do_raw_spin_lock (kernel/locking/spinlock_debug.c:114) 
[ 341.363188][ T2270] ? lockdep_hardirqs_on_prepare (kernel/locking/lockdep.c:4299 kernel/locking/lockdep.c:4358) 
[ 341.363399][ T2270] ? __fget_light (./include/linux/atomic/atomic-arch-fallback.h:479 ./include/linux/atomic/atomic-instrumented.h:50 fs/file.c:1145) 
[ 341.363686][ T2270] __sys_sendmsg (./include/linux/file.h:34 net/socket.c:2682) 
[ 341.363876][ T2270] ? __pfx___sys_sendmsg (net/socket.c:2668) 
[ 341.364050][ T2270] ? __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) 
[ 341.364240][ T2270] do_syscall_64 (arch/x86/entry/common.c:52 arch/x86/entry/common.c:83) 
[ 341.364521][ T2270] entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:130) 
[  341.364730][ T2270] RIP: 0033:0x7f7f4aebf7b7
[ 341.364959][ T2270] 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)
[  341.365652][ T2270] RSP: 002b:00007ffcdd2126a8 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
[  341.365918][ T2270] RAX: ffffffffffffffda RBX: 00007ffcdd212de0 RCX: 00007f7f4aebf7b7
[  341.366180][ T2270] RDX: 0000000000000000 RSI: 00007ffcdd212710 RDI: 0000000000000005
[  341.366434][ T2270] RBP: 0000000000000003 R08: 0000000000000003 R09: 0000000000000000
[  341.366684][ T2270] R10: 000000000c68b910 R11: 0000000000000246 R12: 0000000000000003
[  341.367068][ T2270] R13: 0000000066bea4ab R14: 0000000000496600 R15: 0000000000000000
| [  341.370366][ T2270] 1 lock held by ip/2270:
| [ 341.370510][ T2270] #0: ffffffff91bc5cc8 (rtnl_mutex){+.+.}-{3:3}, at: rtnetlink_rcv_msg (net/core/rtnetlink.c:6645) 
| [  341.370859][ T2270]
| [  341.370859][ T2270] stack backtrace:
[  341.371346][ T2270] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[  341.371846][ T2270] Call Trace:
[  341.371990][ T2270]  <TASK>
[ 341.372078][ T2270] dump_stack_lvl (lib/dump_stack.c:122) 
[ 341.372270][ T2270] lockdep_rcu_suspicious (./include/linux/context_tracking.h:153 kernel/locking/lockdep.c:6725) 
[ 341.372447][ T2270] 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
[ 341.372831][ T2270] br_info_notify (./include/linux/skbuff.h:1320 ./include/net/netlink.h:1015 net/bridge/br_netlink.c:645) bridge
[ 341.373055][ T2270] ? lockdep_hardirqs_on_prepare (kernel/locking/lockdep.c:4299 kernel/locking/lockdep.c:4358) 
[ 341.373268][ T2270] br_add_if (net/bridge/br_if.c:692) bridge
[ 341.373463][ T2270] ? rtnl_is_locked (net/core/rtnetlink.c:164) 
[ 341.373725][ T2270] ? netdev_master_upper_dev_get (net/core/dev.c:7102) 
[ 341.373969][ T2270] do_setlink (net/core/rtnetlink.c:2907) 
[ 341.374150][ T2270] ? is_bpf_text_address (./include/linux/rcupdate.h:336 ./include/linux/rcupdate.h:869 ./kernel/bpf/core.c:769) 
[ 341.374320][ T2270] ? __pfx_do_setlink (net/core/rtnetlink.c:2778) 
[ 341.374586][ T2270] ? is_bpf_text_address (./kernel/bpf/core.c:772) 
[ 341.374751][ T2270] ? kernel_text_address (kernel/extable.c:97 kernel/extable.c:94) 
[ 341.374929][ T2270] ? __kernel_text_address (kernel/extable.c:79) 
[ 341.375113][ T2270] ? unwind_get_return_address (arch/x86/kernel/unwind_orc.c:369 arch/x86/kernel/unwind_orc.c:364) 
[ 341.375382][ T2270] ? __pfx_stack_trace_consume_entry (kernel/stacktrace.c:83) 
[ 341.375612][ T2270] ? arch_stack_walk (arch/x86/kernel/stacktrace.c:26) 
[ 341.375821][ T2270] ? stack_trace_save (kernel/stacktrace.c:123) 
[ 341.375989][ T2270] ? __pfx_stack_trace_save (kernel/stacktrace.c:114) 
[ 341.376171][ T2270] ? __pfx_validate_nla (lib/nlattr.c:396) 
[ 341.376353][ T2270] ? mark_lock (kernel/locking/lockdep.c:4655 (discriminator 3)) 
[ 341.376483][ T2270] ? kasan_save_stack (mm/kasan/common.c:49) 
[ 341.376657][ T2270] ? __nla_validate_parse (lib/nlattr.c:638) 
[ 341.377063][ T2270] __rtnl_newlink (net/core/rtnetlink.c:3696) 
[ 341.377253][ T2270] ? 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) 
[ 341.377447][ T2270] ? __pfx___rtnl_newlink (net/core/rtnetlink.c:3557) 
[ 341.377619][ T2270] ? lockdep_hardirqs_on_prepare (kernel/locking/lockdep.c:4299 kernel/locking/lockdep.c:4358) 
[ 341.377951][ T2270] ? __create_object (mm/kmemleak.c:751) 
[ 341.378136][ T2270] ? trace_kmalloc (./include/trace/events/kmem.h:54 (discriminator 52)) 
[ 341.378310][ T2270] rtnl_newlink (net/core/rtnetlink.c:3744) 
[ 341.378445][ T2270] rtnetlink_rcv_msg (net/core/rtnetlink.c:6647) 
[ 341.378622][ T2270] ? __pfx_rtnetlink_rcv_msg (net/core/rtnetlink.c:6541) 
[ 341.378907][ T2270] ? 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) 
[ 341.379078][ T2270] ? mark_lock (kernel/locking/lockdep.c:4655 (discriminator 3)) 
[ 341.379212][ T2270] ? __lock_acquire (kernel/locking/lockdep.c:5142) 
[ 341.379384][ T2270] netlink_rcv_skb (net/netlink/af_netlink.c:2550) 
[ 341.379648][ T2270] ? __pfx_rtnetlink_rcv_msg (net/core/rtnetlink.c:6541) 
[ 341.379837][ T2270] ? __pfx_netlink_rcv_skb (net/netlink/af_netlink.c:2527) 
[ 341.380018][ T2270] ? netlink_deliver_tap (./include/linux/rcupdate.h:336 ./include/linux/rcupdate.h:869 net/netlink/af_netlink.c:340) 
[ 341.380204][ T2270] ? 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) 
[ 341.380374][ T2270] netlink_unicast (net/netlink/af_netlink.c:1331 net/netlink/af_netlink.c:1357) 
[ 341.380670][ T2270] ? __pfx_netlink_unicast (net/netlink/af_netlink.c:1342) 
[ 341.380896][ T2270] netlink_sendmsg (net/netlink/af_netlink.c:1901) 
[ 341.381084][ T2270] ? __pfx_netlink_sendmsg (net/netlink/af_netlink.c:1820) 
[ 341.381255][ T2270] ? __import_iovec (lib/iov_iter.c:1263 lib/iov_iter.c:1279) 
[ 341.381527][ T2270] ____sys_sendmsg (net/socket.c:730 net/socket.c:745 net/socket.c:2597) 
[ 341.381696][ T2270] ? __pfx_____sys_sendmsg (net/socket.c:2543) 
[ 341.381871][ T2270] ? __pfx_copy_msghdr_from_user (net/socket.c:2523) 
[ 341.382078][ T2270] ? __pfx_validate_chain (kernel/locking/lockdep.c:3824) 
[ 341.382377][ T2270] ___sys_sendmsg (net/socket.c:2653) 
[ 341.382562][ T2270] ? __pfx____sys_sendmsg (net/socket.c:2640) 
[ 341.382729][ T2270] ? find_held_lock (kernel/locking/lockdep.c:5249) 
[ 341.382921][ T2270] ? __lock_release (kernel/locking/lockdep.c:5435) 
[ 341.383194][ T2270] ? __debug_check_no_obj_freed (lib/debugobjects.c:1001) 
[ 341.383407][ T2270] ? __pfx___lock_release (kernel/locking/lockdep.c:5411) 
[ 341.383591][ T2270] ? __pfx_do_raw_spin_lock (kernel/locking/spinlock_debug.c:114) 
[ 341.383762][ T2270] ? lockdep_hardirqs_on_prepare (kernel/locking/lockdep.c:4299 kernel/locking/lockdep.c:4358) 
[ 341.384109][ T2270] ? __fget_light (./include/linux/atomic/atomic-arch-fallback.h:479 ./include/linux/atomic/atomic-instrumented.h:50 fs/file.c:1145) 
[ 341.384297][ T2270] __sys_sendmsg (./include/linux/file.h:34 net/socket.c:2682) 
[ 341.384461][ T2270] ? __pfx___sys_sendmsg (net/socket.c:2668) 
[ 341.384644][ T2270] ? __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) 
[ 341.384936][ T2270] do_syscall_64 (arch/x86/entry/common.c:52 arch/x86/entry/common.c:83) 
[ 341.385107][ T2270] entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:130) 
[  341.385325][ T2270] RIP: 0033:0x7f7f4aebf7b7
[ 341.385506][ T2270] 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)
[  341.386235][ T2270] RSP: 002b:00007ffcdd2126a8 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
[  341.386599][ T2270] RAX: ffffffffffffffda RBX: 00007ffcdd212de0 RCX: 00007f7f4aebf7b7
[  341.386876][ T2270] RDX: 0000000000000000 RSI: 00007ffcdd212710 RDI: 0000000000000005
[  341.387171][ T2270] RBP: 0000000000000003 R08: 0000000000000003 R09: 0000000000000000
[  341.387535][ T2270] R10: 000000000c68b910 R11: 0000000000000246 R12: 0000000000000003


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