======================================
| 0
| xx__-> [   47.816041][  T618] ------------[ cut here ]------------
| [ 47.816399][ T618] WARNING: CPU: 0 PID: 618 at ./include/net/netdev_lock.h:17 netif_set_mtu_ext (./include/net/netdev_lock.h:17 ./include/net/netdev_lock.h:15 ./include/net/netdev_lock.h:25 net/core/dev.c:9610) 
| [   47.817945][  T618] Modules linked in: act_gact cls_flower sch_ingress vrf veth
[   47.818995][  T618] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[ 47.819345][ T618] RIP: 0010:netif_set_mtu_ext (./include/net/netdev_lock.h:17 ./include/net/netdev_lock.h:15 ./include/net/netdev_lock.h:25 net/core/dev.c:9610) 
[ 47.819661][ T618] Code: 00 00 8b 05 d7 bc 3a 02 85 c0 0f 84 52 fe ff ff 48 8d bb a0 0c 00 00 be ff ff ff ff e8 1a 63 7b 00 85 c0 0f 85 39 fe ff ff 90 <0f> 0b 90 e9 30 fe ff ff 48 b8 00 00 00 00 00 fc ff df 4c 89 fa 48
All code
========
   0:	00 00                	add    %al,(%rax)
   2:	8b 05 d7 bc 3a 02    	mov    0x23abcd7(%rip),%eax        # 0x23abcdf
   8:	85 c0                	test   %eax,%eax
   a:	0f 84 52 fe ff ff    	je     0xfffffffffffffe62
  10:	48 8d bb a0 0c 00 00 	lea    0xca0(%rbx),%rdi
  17:	be ff ff ff ff       	mov    $0xffffffff,%esi
  1c:	e8 1a 63 7b 00       	call   0x7b633b
  21:	85 c0                	test   %eax,%eax
  23:	0f 85 39 fe ff ff    	jne    0xfffffffffffffe62
  29:	90                   	nop
  2a:*	0f 0b                	ud2		<-- trapping instruction
  2c:	90                   	nop
  2d:	e9 30 fe ff ff       	jmp    0xfffffffffffffe62
  32:	48 b8 00 00 00 00 00 	movabs $0xdffffc0000000000,%rax
  39:	fc ff df 
  3c:	4c 89 fa             	mov    %r15,%rdx
  3f:	48                   	rex.W

Code starting with the faulting instruction
===========================================
   0:	0f 0b                	ud2
   2:	90                   	nop
   3:	e9 30 fe ff ff       	jmp    0xfffffffffffffe38
   8:	48 b8 00 00 00 00 00 	movabs $0xdffffc0000000000,%rax
   f:	fc ff df 
  12:	4c 89 fa             	mov    %r15,%rdx
  15:	48                   	rex.W
[   47.820669][  T618] RSP: 0018:ffffc90000f7f140 EFLAGS: 00010246
[   47.821034][  T618] RAX: 0000000000000000 RBX: ffff88800a231000 RCX: 0000000000000001
[   47.821447][  T618] RDX: 0000000000000000 RSI: ffffffff88e9b941 RDI: ffffffff886555e0
[   47.822006][  T618] RBP: ffffc90000f7f230 R08: ffff88800aa82000 R09: 0000000000000000
[   47.822424][  T618] R10: ffffc90000f7f5c8 R11: ffffffff89c50668 R12: 1ffff920001efe2c
[   47.822861][  T618] R13: 00000000000005dc R14: ffffc90000f7f880 R15: ffff88800b9d6a60
[   47.823512][  T618] FS:  00007f6db5555800(0000) GS:ffff8880ab2b7000(0000) knlGS:0000000000000000
[   47.824016][  T618] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[   47.824377][  T618] CR2: 00000000004e5aa0 CR3: 000000000c56f003 CR4: 0000000000772ef0
[   47.824824][  T618] PKRU: 55555554
[   47.825035][  T618] Call Trace:
[   47.825243][  T618]  <TASK>
[ 47.825385][ T618] ? find_held_lock (kernel/locking/lockdep.c:5353) 
[ 47.825679][ T618] ? __pfx_netif_set_mtu_ext (net/core/dev.c:9607) 
[ 47.825968][ T618] ? __lock_release (kernel/locking/lockdep.c:5539) 
[ 47.826246][ T618] ? __pfx_validate_linkmsg (net/core/rtnetlink.c:2660) 
[ 47.826528][ T618] ? is_bpf_text_address (kernel/bpf/core.c:777) 
[ 47.826857][ T618] ? kernel_text_address (kernel/extable.c:97 kernel/extable.c:94) 
[ 47.827271][ T618] do_setlink.constprop.0 (net/core/rtnetlink.c:3106) 
[ 47.827567][ T618] ? __pfx_do_setlink.constprop.0 (net/core/rtnetlink.c:3021) 
[ 47.827926][ T618] ? rcu_read_lock_any_held (kernel/rcu/update.c:386 kernel/rcu/update.c:380) 
[ 47.828209][ T618] ? validate_chain (kernel/locking/lockdep.c:3804 kernel/locking/lockdep.c:3824 kernel/locking/lockdep.c:3879) 
[ 47.828493][ T618] ? __kernel_text_address (kernel/extable.c:79) 
[ 47.828785][ T618] ? __lock_acquire (kernel/locking/lockdep.c:5240) 
[ 47.829063][ T618] ? __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:113) 
[ 47.829339][ T618] ? __pfx___mutex_trylock_common (kernel/locking/mutex.c:88) 
[ 47.829695][ T618] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:745) 
[ 47.829983][ T618] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:745) 
[ 47.830262][ T618] ? trace_contention_end (./include/trace/events/lock.h:122 (discriminator 21)) 
[ 47.830545][ T618] ? __mutex_lock (./arch/x86/include/asm/preempt.h:104 kernel/locking/mutex.c:728 kernel/locking/mutex.c:747) 
[ 47.830834][ T618] ? find_held_lock (kernel/locking/lockdep.c:5353) 
[ 47.831109][ T618] ? rtnl_newlink (net/core/rtnetlink.c:343 net/core/rtnetlink.c:4056) 
[ 47.831380][ T618] ? __create_object (mm/kmemleak.c:771) 
[ 47.831667][ T618] ? __pfx___mutex_lock (kernel/locking/mutex.c:746) 
[ 47.832035][ T618] ? trace_cap_capable (./include/trace/events/capability.h:26 (discriminator 21)) 
[ 47.832317][ T618] ? _raw_spin_unlock_irqrestore (./arch/x86/include/asm/preempt.h:104 ./include/linux/spinlock_api_smp.h:152 kernel/locking/spinlock.c:194) 
[ 47.832665][ T618] ? __rtnl_newlink (net/core/rtnetlink.c:3907) 
[ 47.832945][ T618] rtnl_newlink (net/core/rtnetlink.c:351 net/core/rtnetlink.c:4058) 
[ 47.833224][ T618] ? __pfx_rtnl_newlink (net/core/rtnetlink.c:3948) 
[ 47.833503][ T618] ? __lock_acquire (kernel/locking/lockdep.c:5240) 
[ 47.833784][ T618] ? find_held_lock (kernel/locking/lockdep.c:5353) 
[ 47.834059][ T618] ? rtnetlink_rcv_msg (./include/linux/rcupdate.h:341 ./include/linux/rcupdate.h:871 net/core/rtnetlink.c:6944) 
[ 47.834328][ T618] ? __lock_release (kernel/locking/lockdep.c:5539) 
[ 47.834618][ T618] ? __pfx_rtnl_newlink (net/core/rtnetlink.c:3948) 
[ 47.834890][ T618] rtnetlink_rcv_msg (net/core/rtnetlink.c:6946) 
[ 47.835165][ T618] ? __pfx_rtnetlink_rcv_msg (net/core/rtnetlink.c:6849) 
[ 47.835448][ T618] ? __lock_acquire (kernel/locking/lockdep.c:5240) 
[ 47.835739][ T618] netlink_rcv_skb (net/netlink/af_netlink.c:2551) 
[ 47.836014][ T618] ? __pfx_rtnetlink_rcv_msg (net/core/rtnetlink.c:6849) 
[ 47.836289][ T618] ? __pfx_netlink_rcv_skb (net/netlink/af_netlink.c:2528) 
[ 47.836585][ T618] ? netlink_deliver_tap (./include/linux/rcupdate.h:341 ./include/linux/rcupdate.h:871 net/netlink/af_netlink.c:340) 
[ 47.836857][ T618] ? netlink_deliver_tap (./include/linux/rcupdate.h:341 ./include/linux/rcupdate.h:871 ./include/net/netns/generic.h:48 net/netlink/af_netlink.c:333) 
[ 47.837133][ T618] netlink_unicast (net/netlink/af_netlink.c:1320 net/netlink/af_netlink.c:1346) 
[ 47.837410][ T618] ? __pfx_netlink_unicast (net/netlink/af_netlink.c:1331) 
[ 47.837689][ T618] ? __lock_acquire (kernel/locking/lockdep.c:5240) 
[ 47.837968][ T618] netlink_sendmsg (net/netlink/af_netlink.c:1896) 
[ 47.838245][ T618] ? __pfx_netlink_sendmsg (net/netlink/af_netlink.c:1815) 
[ 47.838532][ T618] ? __import_iovec (lib/iov_iter.c:1441 lib/iov_iter.c:1456) 
[ 47.838814][ T618] ____sys_sendmsg (net/socket.c:714 net/socket.c:729 net/socket.c:2614) 
[ 47.839090][ T618] ? __pfx_____sys_sendmsg (net/socket.c:2560) 
[ 47.839358][ T618] ? __pfx_copy_msghdr_from_user (net/socket.c:2540) 
[ 47.839732][ T618] ___sys_sendmsg (net/socket.c:2670) 
[ 47.840004][ T618] ? kasan_record_aux_stack (mm/kasan/generic.c:548) 
[ 47.840277][ T618] ? __call_rcu_common.constprop.0 (./arch/x86/include/asm/irqflags.h:26 ./arch/x86/include/asm/irqflags.h:109 ./arch/x86/include/asm/irqflags.h:127 kernel/rcu/tree.c:3096) 
[ 47.840632][ T618] ? __pfx____sys_sendmsg (net/socket.c:2657) 
[ 47.840909][ T618] ? find_held_lock (kernel/locking/lockdep.c:5353) 
[ 47.841185][ T618] ? __lock_acquire (kernel/locking/lockdep.c:5240) 
[ 47.841471][ T618] ? find_held_lock (kernel/locking/lockdep.c:5353) 
[ 47.841745][ T618] ? __virt_addr_valid (./include/linux/rcupdate.h:341 ./include/linux/rcupdate.h:953 ./include/linux/mmzone.h:2168 arch/x86/mm/physaddr.c:65) 
[ 47.842018][ T618] ? __lock_release (kernel/locking/lockdep.c:5539) 
[ 47.842297][ T618] __sys_sendmsg (net/socket.c:2700) 
[ 47.842576][ T618] ? __call_rcu_common.constprop.0 (kernel/rcu/tree.c:3119) 
[ 47.842925][ T618] ? __pfx___sys_sendmsg (net/socket.c:2685) 
[ 47.843210][ T618] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:745) 
[ 47.843492][ T618] do_syscall_64 (arch/x86/entry/syscall_64.c:63 arch/x86/entry/syscall_64.c:94) 
[ 47.843769][ T618] entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:130) 
[   47.844108][  T618] RIP: 0033:0x7f6db57221e7
[ 47.844453][ T618] Code: 0e 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:	0e                   	(bad)
   1:	00 f7                	add    %dh,%bh
   3:	d8 64 89 02          	fsubs  0x2(%rcx,%rcx,4)
   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)
[   47.845490][  T618] RSP: 002b:00007ffd7f6af358 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
[   47.845908][  T618] RAX: ffffffffffffffda RBX: 00007ffd7f6afa80 RCX: 00007f6db57221e7
[   47.846325][  T618] RDX: 0000000000000000 RSI: 00007ffd7f6af3c0 RDI: 0000000000000005
[   47.846754][  T618] RBP: 0000000000000004 R08: 0000000000000003 R09: 0000000000000078
[   47.847166][  T618] R10: 00007f6db561fee8 R11: 0000000000000246 R12: 0000000000000004
[   47.847588][  T618] R13: 00000000686e171e R14: 0000000000499600 R15: 0000000000000000
| [   48.758265][  T627] ------------[ cut here ]------------
| [ 48.758649][ T627] WARNING: CPU: 2 PID: 627 at ./include/net/netdev_lock.h:17 netif_set_mtu_ext (./include/net/netdev_lock.h:17 ./include/net/netdev_lock.h:15 ./include/net/netdev_lock.h:25 net/core/dev.c:9610) 
| [   48.759601][  T627] Modules linked in: vxlan ip6_udp_tunnel udp_tunnel act_gact cls_flower sch_ingress vrf veth
| [   48.761220][  T627] Tainted: [W]=WARN
[   48.761487][  T627] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[ 48.761861][ T627] RIP: 0010:netif_set_mtu_ext (./include/net/netdev_lock.h:17 ./include/net/netdev_lock.h:15 ./include/net/netdev_lock.h:25 net/core/dev.c:9610) 
[ 48.762171][ T627] Code: 00 00 8b 05 d7 bc 3a 02 85 c0 0f 84 52 fe ff ff 48 8d bb a0 0c 00 00 be ff ff ff ff e8 1a 63 7b 00 85 c0 0f 85 39 fe ff ff 90 <0f> 0b 90 e9 30 fe ff ff 48 b8 00 00 00 00 00 fc ff df 4c 89 fa 48
All code
========
   0:	00 00                	add    %al,(%rax)
   2:	8b 05 d7 bc 3a 02    	mov    0x23abcd7(%rip),%eax        # 0x23abcdf
   8:	85 c0                	test   %eax,%eax
   a:	0f 84 52 fe ff ff    	je     0xfffffffffffffe62
  10:	48 8d bb a0 0c 00 00 	lea    0xca0(%rbx),%rdi
  17:	be ff ff ff ff       	mov    $0xffffffff,%esi
  1c:	e8 1a 63 7b 00       	call   0x7b633b
  21:	85 c0                	test   %eax,%eax
  23:	0f 85 39 fe ff ff    	jne    0xfffffffffffffe62
  29:	90                   	nop
  2a:*	0f 0b                	ud2		<-- trapping instruction
  2c:	90                   	nop
  2d:	e9 30 fe ff ff       	jmp    0xfffffffffffffe62
  32:	48 b8 00 00 00 00 00 	movabs $0xdffffc0000000000,%rax
  39:	fc ff df 
  3c:	4c 89 fa             	mov    %r15,%rdx
  3f:	48                   	rex.W

Code starting with the faulting instruction
===========================================
   0:	0f 0b                	ud2
   2:	90                   	nop
   3:	e9 30 fe ff ff       	jmp    0xfffffffffffffe38
   8:	48 b8 00 00 00 00 00 	movabs $0xdffffc0000000000,%rax
   f:	fc ff df 
  12:	4c 89 fa             	mov    %r15,%rdx
  15:	48                   	rex.W
[   48.763238][  T627] RSP: 0018:ffffc9000115f140 EFLAGS: 00010246
[   48.763628][  T627] RAX: 0000000000000000 RBX: ffff88800c10a000 RCX: 0000000000000001
[   48.764283][  T627] RDX: 0000000000000000 RSI: ffffffff88e9b941 RDI: ffffffff886555e0
[   48.765026][  T627] RBP: ffffc9000115f230 R08: ffff88800bad3800 R09: 0000000000000000
[   48.765783][  T627] R10: ffffc9000115f5c8 R11: ffffffff89c50668 R12: 1ffff9200022be2c
[   48.766569][  T627] R13: 00000000000004ce R14: ffffc9000115f880 R15: ffff888007abe6e0
[   48.767154][  T627] FS:  00007fe3cb9c2800(0000) GS:ffff8880ab3b7000(0000) knlGS:0000000000000000
[   48.767679][  T627] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[   48.768056][  T627] CR2: 00000000004e5360 CR3: 000000000ebd4005 CR4: 0000000000772ef0
[   48.768501][  T627] PKRU: 55555554
[   48.768719][  T627] Call Trace:
[   48.768967][  T627]  <TASK>
[ 48.769122][ T627] ? find_held_lock (kernel/locking/lockdep.c:5353) 
[ 48.769415][ T627] ? __pfx_netif_set_mtu_ext (net/core/dev.c:9607) 
[ 48.769726][ T627] ? __lock_release (kernel/locking/lockdep.c:5539) 
[ 48.770035][ T627] ? __pfx_validate_linkmsg (net/core/rtnetlink.c:2660) 
[ 48.770326][ T627] ? is_bpf_text_address (kernel/bpf/core.c:777) 
[ 48.770640][ T627] ? kernel_text_address (kernel/extable.c:97 kernel/extable.c:94) 
[ 48.770958][ T627] do_setlink.constprop.0 (net/core/rtnetlink.c:3106) 
[ 48.771253][ T627] ? __pfx_do_setlink.constprop.0 (net/core/rtnetlink.c:3021) 
[ 48.771624][ T627] ? rcu_read_lock_any_held (kernel/rcu/update.c:386 kernel/rcu/update.c:380) 
[ 48.771927][ T627] ? validate_chain (kernel/locking/lockdep.c:3804 kernel/locking/lockdep.c:3824 kernel/locking/lockdep.c:3879) 
[ 48.772215][ T627] ? __kernel_text_address (kernel/extable.c:79) 
[ 48.772515][ T627] ? __lock_acquire (kernel/locking/lockdep.c:5240) 
[ 48.772909][ T627] ? __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:113) 
[ 48.773202][ T627] ? __pfx___mutex_trylock_common (kernel/locking/mutex.c:88) 
[ 48.773570][ T627] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:745) 
[ 48.773872][ T627] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:745) 
[ 48.774164][ T627] ? trace_contention_end (./include/trace/events/lock.h:122 (discriminator 21)) 
[ 48.774451][ T627] ? __mutex_lock (./arch/x86/include/asm/preempt.h:104 kernel/locking/mutex.c:728 kernel/locking/mutex.c:747) 
[ 48.774762][ T627] ? find_held_lock (kernel/locking/lockdep.c:5353) 
[ 48.775058][ T627] ? rtnl_newlink (net/core/rtnetlink.c:343 net/core/rtnetlink.c:4056) 
[ 48.775353][ T627] ? __create_object (mm/kmemleak.c:771) 
[ 48.775653][ T627] ? __pfx___mutex_lock (kernel/locking/mutex.c:746) 
[ 48.775988][ T627] ? trace_cap_capable (./include/trace/events/capability.h:26 (discriminator 21)) 
[ 48.776281][ T627] ? _raw_spin_unlock_irqrestore (./arch/x86/include/asm/preempt.h:104 ./include/linux/spinlock_api_smp.h:152 kernel/locking/spinlock.c:194) 
[ 48.776645][ T627] ? __rtnl_newlink (net/core/rtnetlink.c:3907) 
[ 48.776958][ T627] rtnl_newlink (net/core/rtnetlink.c:351 net/core/rtnetlink.c:4058) 
[ 48.777255][ T627] ? __pfx_rtnl_newlink (net/core/rtnetlink.c:3948) 
[ 48.777563][ T627] ? __lock_acquire (kernel/locking/lockdep.c:5240) 
[ 48.777871][ T627] ? find_held_lock (kernel/locking/lockdep.c:5353) 
[ 48.778161][ T627] ? rtnetlink_rcv_msg (./include/linux/rcupdate.h:341 ./include/linux/rcupdate.h:871 net/core/rtnetlink.c:6944) 
[ 48.778493][ T627] ? __lock_release (kernel/locking/lockdep.c:5539) 
[ 48.778812][ T627] ? __pfx_rtnl_newlink (net/core/rtnetlink.c:3948) 
[ 48.779114][ T627] rtnetlink_rcv_msg (net/core/rtnetlink.c:6946) 
[ 48.779410][ T627] ? __pfx_rtnetlink_rcv_msg (net/core/rtnetlink.c:6849) 
[ 48.779734][ T627] ? __lock_acquire (kernel/locking/lockdep.c:5240) 
[ 48.780235][ T627] netlink_rcv_skb (net/netlink/af_netlink.c:2551) 
[ 48.780727][ T627] ? __pfx_rtnetlink_rcv_msg (net/core/rtnetlink.c:6849) 
[ 48.781214][ T627] ? __pfx_netlink_rcv_skb (net/netlink/af_netlink.c:2528) 
[ 48.781744][ T627] ? netlink_deliver_tap (./include/linux/rcupdate.h:341 ./include/linux/rcupdate.h:871 net/netlink/af_netlink.c:340) 
[ 48.782241][ T627] ? netlink_deliver_tap (./include/linux/rcupdate.h:341 ./include/linux/rcupdate.h:871 ./include/net/netns/generic.h:48 net/netlink/af_netlink.c:333) 
[ 48.782768][ T627] netlink_unicast (net/netlink/af_netlink.c:1320 net/netlink/af_netlink.c:1346) 
[ 48.783233][ T627] ? __pfx_netlink_unicast (net/netlink/af_netlink.c:1331) 
[ 48.783550][ T627] ? __lock_acquire (kernel/locking/lockdep.c:5240) 
[ 48.783878][ T627] netlink_sendmsg (net/netlink/af_netlink.c:1896) 
[ 48.784182][ T627] ? __pfx_netlink_sendmsg (net/netlink/af_netlink.c:1815) 
[ 48.784485][ T627] ? __import_iovec (lib/iov_iter.c:1441 lib/iov_iter.c:1456) 
[ 48.784801][ T627] ____sys_sendmsg (net/socket.c:714 net/socket.c:729 net/socket.c:2614) 
[ 48.785098][ T627] ? __pfx_____sys_sendmsg (net/socket.c:2560) 
[ 48.785385][ T627] ? __pfx_copy_msghdr_from_user (net/socket.c:2540) 
[ 48.785782][ T627] ___sys_sendmsg (net/socket.c:2670) 
[ 48.786070][ T627] ? kasan_record_aux_stack (mm/kasan/generic.c:548) 
[ 48.786363][ T627] ? __call_rcu_common.constprop.0 (./arch/x86/include/asm/irqflags.h:26 ./arch/x86/include/asm/irqflags.h:109 ./arch/x86/include/asm/irqflags.h:127 kernel/rcu/tree.c:3096) 
[ 48.786734][ T627] ? __pfx____sys_sendmsg (net/socket.c:2657) 
[ 48.787052][ T627] ? find_held_lock (kernel/locking/lockdep.c:5353) 
[ 48.787344][ T627] ? __lock_acquire (kernel/locking/lockdep.c:5240) 
[ 48.787648][ T627] ? find_held_lock (kernel/locking/lockdep.c:5353) 
[ 48.787960][ T627] ? __virt_addr_valid (./include/linux/rcupdate.h:341 ./include/linux/rcupdate.h:953 ./include/linux/mmzone.h:2168 arch/x86/mm/physaddr.c:65) 
[ 48.788249][ T627] ? __lock_release (kernel/locking/lockdep.c:5539) 
[ 48.788556][ T627] __sys_sendmsg (net/socket.c:2700) 
[ 48.788860][ T627] ? __call_rcu_common.constprop.0 (kernel/rcu/tree.c:3119) 
[ 48.789211][ T627] ? __pfx___sys_sendmsg (net/socket.c:2685) 
[ 48.789539][ T627] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:745) 
[ 48.789848][ T627] do_syscall_64 (arch/x86/entry/syscall_64.c:63 arch/x86/entry/syscall_64.c:94) 
[ 48.790145][ T627] entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:130) 
[   48.790523][  T627] RIP: 0033:0x7fe3cbb8f1e7
[ 48.790846][ T627] Code: 0e 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:	0e                   	(bad)
   1:	00 f7                	add    %dh,%bh
   3:	d8 64 89 02          	fsubs  0x2(%rcx,%rcx,4)
   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)
[   48.791948][  T627] RSP: 002b:00007ffd6d0f64f8 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
[   48.792388][  T627] RAX: ffffffffffffffda RBX: 00007ffd6d0f6c20 RCX: 00007fe3cbb8f1e7
[   48.792842][  T627] RDX: 0000000000000000 RSI: 00007ffd6d0f6560 RDI: 0000000000000005
[   48.793265][  T627] RBP: 0000000000000004 R08: 0000000000000003 R09: 0000000000000078
[   48.793700][  T627] R10: 00007fe3cba8cee8 R11: 0000000000000246 R12: 0000000000000004
[   48.794140][  T627] R13: 00000000686e171f R14: 0000000000499600 R15: 0000000000000000
| [   48.960572][  T628] ------------[ cut here ]------------
| [ 48.960891][ T628] WARNING: CPU: 1 PID: 628 at ./include/net/netdev_lock.h:17 netif_set_mtu_ext (./include/net/netdev_lock.h:17 ./include/net/netdev_lock.h:15 ./include/net/netdev_lock.h:25 net/core/dev.c:9610) 
| [   48.961431][  T628] Modules linked in: vxlan ip6_udp_tunnel udp_tunnel act_gact cls_flower sch_ingress vrf veth
| [   48.962702][  T628] Tainted: [W]=WARN
[   48.962915][  T628] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[ 48.963258][ T628] RIP: 0010:netif_set_mtu_ext (./include/net/netdev_lock.h:17 ./include/net/netdev_lock.h:15 ./include/net/netdev_lock.h:25 net/core/dev.c:9610) 
[ 48.963557][ T628] Code: 00 00 8b 05 d7 bc 3a 02 85 c0 0f 84 52 fe ff ff 48 8d bb a0 0c 00 00 be ff ff ff ff e8 1a 63 7b 00 85 c0 0f 85 39 fe ff ff 90 <0f> 0b 90 e9 30 fe ff ff 48 b8 00 00 00 00 00 fc ff df 4c 89 fa 48
All code
========
   0:	00 00                	add    %al,(%rax)
   2:	8b 05 d7 bc 3a 02    	mov    0x23abcd7(%rip),%eax        # 0x23abcdf
   8:	85 c0                	test   %eax,%eax
   a:	0f 84 52 fe ff ff    	je     0xfffffffffffffe62
  10:	48 8d bb a0 0c 00 00 	lea    0xca0(%rbx),%rdi
  17:	be ff ff ff ff       	mov    $0xffffffff,%esi
  1c:	e8 1a 63 7b 00       	call   0x7b633b
  21:	85 c0                	test   %eax,%eax
  23:	0f 85 39 fe ff ff    	jne    0xfffffffffffffe62
  29:	90                   	nop
  2a:*	0f 0b                	ud2		<-- trapping instruction
  2c:	90                   	nop
  2d:	e9 30 fe ff ff       	jmp    0xfffffffffffffe62
  32:	48 b8 00 00 00 00 00 	movabs $0xdffffc0000000000,%rax
  39:	fc ff df 
  3c:	4c 89 fa             	mov    %r15,%rdx
  3f:	48                   	rex.W

Code starting with the faulting instruction
===========================================
   0:	0f 0b                	ud2
   2:	90                   	nop
   3:	e9 30 fe ff ff       	jmp    0xfffffffffffffe38
   8:	48 b8 00 00 00 00 00 	movabs $0xdffffc0000000000,%rax
   f:	fc ff df 
  12:	4c 89 fa             	mov    %r15,%rdx
  15:	48                   	rex.W
[   48.964555][  T628] RSP: 0018:ffffc9000115f140 EFLAGS: 00010246
[   48.964908][  T628] RAX: 0000000000000000 RBX: ffff88800a231000 RCX: 0000000000000001
[   48.965320][  T628] RDX: 0000000000000000 RSI: ffffffff88e9b941 RDI: ffffffff886555e0
[   48.965737][  T628] RBP: ffffc9000115f230 R08: ffff88800a3aa000 R09: 0000000000000000
[   48.966158][  T628] R10: ffffc9000115f5c8 R11: ffffffff89c50668 R12: 1ffff9200022be2c
[   48.966577][  T628] R13: 00000000000005dc R14: ffffc9000115f880 R15: ffff88800b7e2360
[   48.966989][  T628] FS:  00007f9fa78fb800(0000) GS:ffff8880ab337000(0000) knlGS:0000000000000000
[   48.967477][  T628] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[   48.967827][  T628] CR2: 00000000004e5aa0 CR3: 000000000ebc8003 CR4: 0000000000772ef0
[   48.968249][  T628] PKRU: 55555554
[   48.968454][  T628] Call Trace:
[   48.968669][  T628]  <TASK>
[ 48.968813][ T628] ? find_held_lock (kernel/locking/lockdep.c:5353) 
[ 48.969093][ T628] ? __pfx_netif_set_mtu_ext (net/core/dev.c:9607) 
[ 48.969364][ T628] ? __lock_release (kernel/locking/lockdep.c:5539) 
[ 48.969680][ T628] ? __pfx_validate_linkmsg (net/core/rtnetlink.c:2660) 
[ 48.969958][ T628] ? is_bpf_text_address (kernel/bpf/core.c:777) 
[ 48.970239][ T628] ? kernel_text_address (kernel/extable.c:97 kernel/extable.c:94) 
[ 48.970628][ T628] do_setlink.constprop.0 (net/core/rtnetlink.c:3106) 
[ 48.970916][ T628] ? __pfx_do_setlink.constprop.0 (net/core/rtnetlink.c:3021) 
[ 48.971266][ T628] ? rcu_read_lock_any_held (kernel/rcu/update.c:386 kernel/rcu/update.c:380) 
[ 48.971547][ T628] ? validate_chain (kernel/locking/lockdep.c:3804 kernel/locking/lockdep.c:3824 kernel/locking/lockdep.c:3879) 
[ 48.971821][ T628] ? __kernel_text_address (kernel/extable.c:79) 
[ 48.972103][ T628] ? __lock_acquire (kernel/locking/lockdep.c:5240) 
[ 48.972379][ T628] ? __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:113) 
[ 48.972682][ T628] ? __pfx___mutex_trylock_common (kernel/locking/mutex.c:88) 
[ 48.973024][ T628] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:745) 
[ 48.973297][ T628] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:745) 
[ 48.973585][ T628] ? trace_contention_end (./include/trace/events/lock.h:122 (discriminator 21)) 
[ 48.973860][ T628] ? __mutex_lock (./arch/x86/include/asm/preempt.h:104 kernel/locking/mutex.c:728 kernel/locking/mutex.c:747) 
[ 48.974142][ T628] ? find_held_lock (kernel/locking/lockdep.c:5353) 
[ 48.974413][ T628] ? rtnl_newlink (net/core/rtnetlink.c:343 net/core/rtnetlink.c:4056) 
[ 48.974692][ T628] ? __create_object (mm/kmemleak.c:771) 
[ 48.974971][ T628] ? __pfx___mutex_lock (kernel/locking/mutex.c:746) 
[ 48.975248][ T628] ? trace_cap_capable (./include/trace/events/capability.h:26 (discriminator 21)) 
[ 48.975528][ T628] ? _raw_spin_unlock_irqrestore (./arch/x86/include/asm/preempt.h:104 ./include/linux/spinlock_api_smp.h:152 kernel/locking/spinlock.c:194) 
[ 48.975869][ T628] ? __rtnl_newlink (net/core/rtnetlink.c:3907) 
[ 48.976149][ T628] rtnl_newlink (net/core/rtnetlink.c:351 net/core/rtnetlink.c:4058) 
[ 48.976432][ T628] ? __pfx_rtnl_newlink (net/core/rtnetlink.c:3948) 
[ 48.976712][ T628] ? __lock_acquire (kernel/locking/lockdep.c:5240) 
[ 48.976991][ T628] ? find_held_lock (kernel/locking/lockdep.c:5353) 
[ 48.977263][ T628] ? rtnetlink_rcv_msg (./include/linux/rcupdate.h:341 ./include/linux/rcupdate.h:871 net/core/rtnetlink.c:6944) 
[ 48.977545][ T628] ? __lock_release (kernel/locking/lockdep.c:5539) 
[ 48.977820][ T628] ? __pfx_rtnl_newlink (net/core/rtnetlink.c:3948) 
[ 48.978092][ T628] rtnetlink_rcv_msg (net/core/rtnetlink.c:6946) 
[ 48.978366][ T628] ? __pfx_rtnetlink_rcv_msg (net/core/rtnetlink.c:6849) 
[ 48.978659][ T628] ? __lock_acquire (kernel/locking/lockdep.c:5240) 
[ 48.978936][ T628] netlink_rcv_skb (net/netlink/af_netlink.c:2551) 
[ 48.979209][ T628] ? __pfx_rtnetlink_rcv_msg (net/core/rtnetlink.c:6849) 
[ 48.979547][ T628] ? __pfx_netlink_rcv_skb (net/netlink/af_netlink.c:2528) 
[ 48.979834][ T628] ? netlink_deliver_tap (./include/linux/rcupdate.h:341 ./include/linux/rcupdate.h:871 net/netlink/af_netlink.c:340) 
[ 48.980113][ T628] ? netlink_deliver_tap (./include/linux/rcupdate.h:341 ./include/linux/rcupdate.h:871 ./include/net/netns/generic.h:48 net/netlink/af_netlink.c:333) 
[ 48.980386][ T628] netlink_unicast (net/netlink/af_netlink.c:1320 net/netlink/af_netlink.c:1346) 
[ 48.980691][ T628] ? __pfx_netlink_unicast (net/netlink/af_netlink.c:1331) 
[ 48.980968][ T628] ? __lock_acquire (kernel/locking/lockdep.c:5240) 
[ 48.981247][ T628] netlink_sendmsg (net/netlink/af_netlink.c:1896) 
[ 48.981536][ T628] ? __pfx_netlink_sendmsg (net/netlink/af_netlink.c:1815) 
[ 48.981813][ T628] ? __import_iovec (lib/iov_iter.c:1441 lib/iov_iter.c:1456) 
[ 48.982092][ T628] ____sys_sendmsg (net/socket.c:714 net/socket.c:729 net/socket.c:2614) 
[ 48.982372][ T628] ? __pfx_____sys_sendmsg (net/socket.c:2560) 
[ 48.982665][ T628] ? __pfx_copy_msghdr_from_user (net/socket.c:2540) 
[ 48.983021][ T628] ___sys_sendmsg (net/socket.c:2670) 
[ 48.983292][ T628] ? kasan_record_aux_stack (mm/kasan/generic.c:548) 
[ 48.983573][ T628] ? __call_rcu_common.constprop.0 (./arch/x86/include/asm/irqflags.h:26 ./arch/x86/include/asm/irqflags.h:109 ./arch/x86/include/asm/irqflags.h:127 kernel/rcu/tree.c:3096) 
[ 48.983919][ T628] ? __pfx____sys_sendmsg (net/socket.c:2657) 
[ 48.984195][ T628] ? find_held_lock (kernel/locking/lockdep.c:5353) 
[ 48.984482][ T628] ? __lock_acquire (kernel/locking/lockdep.c:5240) 
[ 48.984769][ T628] ? find_held_lock (kernel/locking/lockdep.c:5353) 
[ 48.985041][ T628] ? __virt_addr_valid (./include/linux/rcupdate.h:341 ./include/linux/rcupdate.h:953 ./include/linux/mmzone.h:2168 arch/x86/mm/physaddr.c:65) 
[ 48.985316][ T628] ? __lock_release (kernel/locking/lockdep.c:5539) 
[ 48.985608][ T628] __sys_sendmsg (net/socket.c:2700) 
[ 48.985889][ T628] ? __call_rcu_common.constprop.0 (kernel/rcu/tree.c:3119) 
[ 48.986227][ T628] ? __pfx___sys_sendmsg (net/socket.c:2685) 
[ 48.986521][ T628] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:745) 
[ 48.986804][ T628] do_syscall_64 (arch/x86/entry/syscall_64.c:63 arch/x86/entry/syscall_64.c:94) 
[ 48.987083][ T628] entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:130) 
[   48.987422][  T628] RIP: 0033:0x7f9fa7ac81e7
[ 48.987714][ T628] Code: 0e 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:	0e                   	(bad)
   1:	00 f7                	add    %dh,%bh
   3:	d8 64 89 02          	fsubs  0x2(%rcx,%rcx,4)
   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)
[   48.988698][  T628] RSP: 002b:00007ffc9e4a43c8 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
[   48.989132][  T628] RAX: ffffffffffffffda RBX: 00007ffc9e4a4af0 RCX: 00007f9fa7ac81e7
[   48.989564][  T628] RDX: 0000000000000000 RSI: 00007ffc9e4a4430 RDI: 0000000000000005
[   48.989993][  T628] RBP: 0000000000000004 R08: 0000000000000003 R09: 0000000000000078
[   48.990402][  T628] R10: 00007f9fa79c5ee8 R11: 0000000000000246 R12: 0000000000000004
[   48.990829][  T628] R13: 00000000686e171f R14: 0000000000499600 R15: 0000000000000000
| [   49.239109][  T632] ------------[ cut here ]------------
| [ 49.239634][ T632] WARNING: CPU: 2 PID: 632 at ./include/net/netdev_lock.h:17 netif_set_mtu_ext (./include/net/netdev_lock.h:17 ./include/net/netdev_lock.h:15 ./include/net/netdev_lock.h:25 net/core/dev.c:9610) 
| [   49.240216][  T632] Modules linked in: vxlan ip6_udp_tunnel udp_tunnel act_gact cls_flower sch_ingress vrf veth
| [   49.241492][  T632] Tainted: [W]=WARN
[   49.241717][  T632] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[ 49.242090][ T632] RIP: 0010:netif_set_mtu_ext (./include/net/netdev_lock.h:17 ./include/net/netdev_lock.h:15 ./include/net/netdev_lock.h:25 net/core/dev.c:9610) 
[ 49.242390][ T632] Code: 00 00 8b 05 d7 bc 3a 02 85 c0 0f 84 52 fe ff ff 48 8d bb a0 0c 00 00 be ff ff ff ff e8 1a 63 7b 00 85 c0 0f 85 39 fe ff ff 90 <0f> 0b 90 e9 30 fe ff ff 48 b8 00 00 00 00 00 fc ff df 4c 89 fa 48
All code
========
   0:	00 00                	add    %al,(%rax)
   2:	8b 05 d7 bc 3a 02    	mov    0x23abcd7(%rip),%eax        # 0x23abcdf
   8:	85 c0                	test   %eax,%eax
   a:	0f 84 52 fe ff ff    	je     0xfffffffffffffe62
  10:	48 8d bb a0 0c 00 00 	lea    0xca0(%rbx),%rdi
  17:	be ff ff ff ff       	mov    $0xffffffff,%esi
  1c:	e8 1a 63 7b 00       	call   0x7b633b
  21:	85 c0                	test   %eax,%eax
  23:	0f 85 39 fe ff ff    	jne    0xfffffffffffffe62
  29:	90                   	nop
  2a:*	0f 0b                	ud2		<-- trapping instruction
  2c:	90                   	nop
  2d:	e9 30 fe ff ff       	jmp    0xfffffffffffffe62
  32:	48 b8 00 00 00 00 00 	movabs $0xdffffc0000000000,%rax
  39:	fc ff df 
  3c:	4c 89 fa             	mov    %r15,%rdx
  3f:	48                   	rex.W

Code starting with the faulting instruction
===========================================
   0:	0f 0b                	ud2
   2:	90                   	nop
   3:	e9 30 fe ff ff       	jmp    0xfffffffffffffe38
   8:	48 b8 00 00 00 00 00 	movabs $0xdffffc0000000000,%rax
   f:	fc ff df 
  12:	4c 89 fa             	mov    %r15,%rdx
  15:	48                   	rex.W
[   49.243409][  T632] RSP: 0018:ffffc900004c7140 EFLAGS: 00010246
[   49.243792][  T632] RAX: 0000000000000000 RBX: ffff88800a231000 RCX: 0000000000000001
[   49.244222][  T632] RDX: 0000000000000000 RSI: ffffffff88e9b941 RDI: ffffffff886555e0
[   49.244769][  T632] RBP: ffffc900004c7230 R08: ffff888008b30800 R09: 0000000000000000
[   49.245205][  T632] R10: ffffc900004c75c8 R11: ffffffff89c50668 R12: 1ffff92000098e2c
[   49.245653][  T632] R13: 00000000000003e8 R14: ffffc900004c7880 R15: ffff88800b7e3be0
[   49.246097][  T632] FS:  00007fe614993800(0000) GS:ffff8880ab3b7000(0000) knlGS:0000000000000000
[   49.246631][  T632] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[   49.247006][  T632] CR2: 00000000004e5aa0 CR3: 0000000009529003 CR4: 0000000000772ef0
[   49.247435][  T632] PKRU: 55555554
[   49.247668][  T632] Call Trace:
[   49.247902][  T632]  <TASK>
[ 49.248056][ T632] ? find_held_lock (kernel/locking/lockdep.c:5353) 
[ 49.248353][ T632] ? __pfx_netif_set_mtu_ext (net/core/dev.c:9607) 
[ 49.248656][ T632] ? __lock_release (kernel/locking/lockdep.c:5539) 
[ 49.248967][ T632] ? __pfx_validate_linkmsg (net/core/rtnetlink.c:2660) 
[ 49.249264][ T632] ? is_bpf_text_address (kernel/bpf/core.c:777) 
[ 49.249583][ T632] ? kernel_text_address (kernel/extable.c:97 kernel/extable.c:94) 
[ 49.249902][ T632] do_setlink.constprop.0 (net/core/rtnetlink.c:3106) 
[ 49.250222][ T632] ? __pfx_do_setlink.constprop.0 (net/core/rtnetlink.c:3021) 
[ 49.250861][ T632] ? rcu_read_lock_any_held (kernel/rcu/update.c:386 kernel/rcu/update.c:380) 
[ 49.251342][ T632] ? validate_chain (kernel/locking/lockdep.c:3804 kernel/locking/lockdep.c:3824 kernel/locking/lockdep.c:3879) 
[ 49.251764][ T632] ? __kernel_text_address (kernel/extable.c:79) 
[ 49.252271][ T632] ? __lock_acquire (kernel/locking/lockdep.c:5240) 
[ 49.252805][ T632] ? __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:113) 
[ 49.253312][ T632] ? __pfx___mutex_trylock_common (kernel/locking/mutex.c:88) 
[ 49.253946][ T632] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:745) 
[ 49.254427][ T632] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:745) 
[ 49.254959][ T632] ? trace_contention_end (./include/trace/events/lock.h:122 (discriminator 21)) 
[ 49.255499][ T632] ? __mutex_lock (./arch/x86/include/asm/preempt.h:104 kernel/locking/mutex.c:728 kernel/locking/mutex.c:747) 
[ 49.256000][ T632] ? find_held_lock (kernel/locking/lockdep.c:5353) 
[ 49.256528][ T632] ? rtnl_newlink (net/core/rtnetlink.c:343 net/core/rtnetlink.c:4056) 
[ 49.257028][ T632] ? __create_object (mm/kmemleak.c:771) 
[ 49.257540][ T632] ? __pfx___mutex_lock (kernel/locking/mutex.c:746) 
[ 49.258042][ T632] ? trace_cap_capable (./include/trace/events/capability.h:26 (discriminator 21)) 
[ 49.258568][ T632] ? _raw_spin_unlock_irqrestore (./arch/x86/include/asm/preempt.h:104 ./include/linux/spinlock_api_smp.h:152 kernel/locking/spinlock.c:194) 
[ 49.259173][ T632] ? __rtnl_newlink (net/core/rtnetlink.c:3907) 
[ 49.259734][ T632] rtnl_newlink (net/core/rtnetlink.c:351 net/core/rtnetlink.c:4058) 
[ 49.260259][ T632] ? __pfx_rtnl_newlink (net/core/rtnetlink.c:3948) 
[ 49.260784][ T632] ? __lock_acquire (kernel/locking/lockdep.c:5240) 
[ 49.261309][ T632] ? find_held_lock (kernel/locking/lockdep.c:5353) 
[ 49.261842][ T632] ? rtnetlink_rcv_msg (./include/linux/rcupdate.h:341 ./include/linux/rcupdate.h:871 net/core/rtnetlink.c:6944) 
[ 49.262346][ T632] ? __lock_release (kernel/locking/lockdep.c:5539) 
[ 49.262879][ T632] ? __pfx_rtnl_newlink (net/core/rtnetlink.c:3948) 
[ 49.263399][ T632] rtnetlink_rcv_msg (net/core/rtnetlink.c:6946) 
[ 49.263914][ T632] ? __pfx_rtnetlink_rcv_msg (net/core/rtnetlink.c:6849) 
[ 49.264432][ T632] ? __lock_acquire (kernel/locking/lockdep.c:5240) 
[ 49.264968][ T632] netlink_rcv_skb (net/netlink/af_netlink.c:2551) 
[ 49.265489][ T632] ? __pfx_rtnetlink_rcv_msg (net/core/rtnetlink.c:6849) 
[ 49.266003][ T632] ? __pfx_netlink_rcv_skb (net/netlink/af_netlink.c:2528) 
[ 49.266554][ T632] ? netlink_deliver_tap (./include/linux/rcupdate.h:341 ./include/linux/rcupdate.h:871 net/netlink/af_netlink.c:340) 
[ 49.267069][ T632] ? netlink_deliver_tap (./include/linux/rcupdate.h:341 ./include/linux/rcupdate.h:871 ./include/net/netns/generic.h:48 net/netlink/af_netlink.c:333) 
[ 49.267600][ T632] netlink_unicast (net/netlink/af_netlink.c:1320 net/netlink/af_netlink.c:1346) 
[ 49.268116][ T632] ? __pfx_netlink_unicast (net/netlink/af_netlink.c:1331) 
[ 49.268622][ T632] ? __lock_acquire (kernel/locking/lockdep.c:5240) 
[ 49.269091][ T632] netlink_sendmsg (net/netlink/af_netlink.c:1896) 
[ 49.269640][ T632] ? __pfx_netlink_sendmsg (net/netlink/af_netlink.c:1815) 
[ 49.270139][ T632] ? __import_iovec (lib/iov_iter.c:1441 lib/iov_iter.c:1456) 
[ 49.270688][ T632] ____sys_sendmsg (net/socket.c:714 net/socket.c:729 net/socket.c:2614) 
[ 49.271212][ T632] ? __pfx_____sys_sendmsg (net/socket.c:2560) 
[ 49.271738][ T632] ? __pfx_copy_msghdr_from_user (net/socket.c:2540) 
[ 49.272392][ T632] ___sys_sendmsg (net/socket.c:2670) 
[ 49.272916][ T632] ? kasan_record_aux_stack (mm/kasan/generic.c:548) 
[ 49.273423][ T632] ? __call_rcu_common.constprop.0 (./arch/x86/include/asm/irqflags.h:26 ./arch/x86/include/asm/irqflags.h:109 ./arch/x86/include/asm/irqflags.h:127 kernel/rcu/tree.c:3096) 
[ 49.274063][ T632] ? __pfx____sys_sendmsg (net/socket.c:2657) 
[ 49.274603][ T632] ? find_held_lock (kernel/locking/lockdep.c:5353) 
[ 49.275110][ T632] ? __lock_acquire (kernel/locking/lockdep.c:5240) 
[ 49.275649][ T632] ? find_held_lock (kernel/locking/lockdep.c:5353) 
[ 49.276154][ T632] ? __virt_addr_valid (./include/linux/rcupdate.h:341 ./include/linux/rcupdate.h:953 ./include/linux/mmzone.h:2168 arch/x86/mm/physaddr.c:65) 
[ 49.276671][ T632] ? __lock_release (kernel/locking/lockdep.c:5539) 
[ 49.277054][ T632] __sys_sendmsg (net/socket.c:2700) 
[ 49.277339][ T632] ? __call_rcu_common.constprop.0 (kernel/rcu/tree.c:3119) 
[ 49.277706][ T632] ? __pfx___sys_sendmsg (net/socket.c:2685) 
[ 49.278025][ T632] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:745) 
[ 49.278315][ T632] do_syscall_64 (arch/x86/entry/syscall_64.c:63 arch/x86/entry/syscall_64.c:94) 
[ 49.278620][ T632] entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:130) 
[   49.278988][  T632] RIP: 0033:0x7fe614b601e7
[ 49.279286][ T632] Code: 0e 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:	0e                   	(bad)
   1:	00 f7                	add    %dh,%bh
   3:	d8 64 89 02          	fsubs  0x2(%rcx,%rcx,4)
   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)
[   49.280502][  T632] RSP: 002b:00007ffc535a43f8 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
[   49.280946][  T632] RAX: ffffffffffffffda RBX: 00007ffc535a4b20 RCX: 00007fe614b601e7
[   49.281373][  T632] RDX: 0000000000000000 RSI: 00007ffc535a4460 RDI: 0000000000000005
[   49.281817][  T632] RBP: 0000000000000004 R08: 0000000000000003 R09: 0000000000000078
[   49.282256][  T632] R10: 00007fe614a5dee8 R11: 0000000000000246 R12: 0000000000000004
[   49.282686][  T632] R13: 00000000686e1720 R14: 0000000000499600 R15: 0000000000000000
| [   65.728269][  T759] ------------[ cut here ]------------
| [ 65.728917][ T759] WARNING: CPU: 2 PID: 759 at ./include/net/netdev_lock.h:17 netif_set_mtu_ext (./include/net/netdev_lock.h:17 ./include/net/netdev_lock.h:15 ./include/net/netdev_lock.h:25 net/core/dev.c:9610) 
| [   65.729778][  T759] Modules linked in: act_tunnel_key cls_matchall vxlan ip6_udp_tunnel udp_tunnel act_gact cls_flower sch_ingress vrf veth
| [   65.731015][  T759] Tainted: [W]=WARN
[   65.731239][  T759] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[ 65.731608][ T759] RIP: 0010:netif_set_mtu_ext (./include/net/netdev_lock.h:17 ./include/net/netdev_lock.h:15 ./include/net/netdev_lock.h:25 net/core/dev.c:9610) 
[ 65.731909][ T759] Code: 00 00 8b 05 d7 bc 3a 02 85 c0 0f 84 52 fe ff ff 48 8d bb a0 0c 00 00 be ff ff ff ff e8 1a 63 7b 00 85 c0 0f 85 39 fe ff ff 90 <0f> 0b 90 e9 30 fe ff ff 48 b8 00 00 00 00 00 fc ff df 4c 89 fa 48
All code
========
   0:	00 00                	add    %al,(%rax)
   2:	8b 05 d7 bc 3a 02    	mov    0x23abcd7(%rip),%eax        # 0x23abcdf
   8:	85 c0                	test   %eax,%eax
   a:	0f 84 52 fe ff ff    	je     0xfffffffffffffe62
  10:	48 8d bb a0 0c 00 00 	lea    0xca0(%rbx),%rdi
  17:	be ff ff ff ff       	mov    $0xffffffff,%esi
  1c:	e8 1a 63 7b 00       	call   0x7b633b
  21:	85 c0                	test   %eax,%eax
  23:	0f 85 39 fe ff ff    	jne    0xfffffffffffffe62
  29:	90                   	nop
  2a:*	0f 0b                	ud2		<-- trapping instruction
  2c:	90                   	nop
  2d:	e9 30 fe ff ff       	jmp    0xfffffffffffffe62
  32:	48 b8 00 00 00 00 00 	movabs $0xdffffc0000000000,%rax
  39:	fc ff df 
  3c:	4c 89 fa             	mov    %r15,%rdx
  3f:	48                   	rex.W

Code starting with the faulting instruction
===========================================
   0:	0f 0b                	ud2
   2:	90                   	nop
   3:	e9 30 fe ff ff       	jmp    0xfffffffffffffe38
   8:	48 b8 00 00 00 00 00 	movabs $0xdffffc0000000000,%rax
   f:	fc ff df 
  12:	4c 89 fa             	mov    %r15,%rdx
  15:	48                   	rex.W
[   65.732923][  T759] RSP: 0018:ffffc90000967140 EFLAGS: 00010246
[   65.733303][  T759] RAX: 0000000000000000 RBX: ffff88800a231000 RCX: 0000000000000001
[   65.733743][  T759] RDX: 0000000000000000 RSI: ffffffff88e9b941 RDI: ffffffff886555e0
[   65.734174][  T759] RBP: ffffc90000967230 R08: ffff88800b812000 R09: 0000000000000000
[   65.734618][  T759] R10: ffffc900009675c8 R11: ffffffff89c50668 R12: 1ffff9200012ce2c
[   65.735041][  T759] R13: 00000000000005dc R14: ffffc90000967880 R15: ffff88800ec02de0
[   65.735470][  T759] FS:  00007f5d3b58e800(0000) GS:ffff8880ab3b7000(0000) knlGS:0000000000000000
[   65.735963][  T759] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[   65.736327][  T759] CR2: 00000000004e5aa0 CR3: 000000000c6ee003 CR4: 0000000000772ef0
[   65.736763][  T759] PKRU: 55555554
[   65.736982][  T759] Call Trace:
[   65.737200][  T759]  <TASK>
[ 65.737353][ T759] ? find_held_lock (kernel/locking/lockdep.c:5353) 
[ 65.737657][ T759] ? __pfx_netif_set_mtu_ext (net/core/dev.c:9607) 
[ 65.737943][ T759] ? __lock_release (kernel/locking/lockdep.c:5539) 
[ 65.738230][ T759] ? __pfx_validate_linkmsg (net/core/rtnetlink.c:2660) 
[ 65.738532][ T759] ? is_bpf_text_address (kernel/bpf/core.c:777) 
[ 65.738819][ T759] ? kernel_text_address (kernel/extable.c:97 kernel/extable.c:94) 
[ 65.739109][ T759] do_setlink.constprop.0 (net/core/rtnetlink.c:3106) 
[ 65.739399][ T759] ? __pfx_do_setlink.constprop.0 (net/core/rtnetlink.c:3021) 
[ 65.739787][ T759] ? rcu_read_lock_any_held (kernel/rcu/update.c:386 kernel/rcu/update.c:380) 
[ 65.740075][ T759] ? validate_chain (kernel/locking/lockdep.c:3804 kernel/locking/lockdep.c:3824 kernel/locking/lockdep.c:3879) 
[ 65.740362][ T759] ? __kernel_text_address (kernel/extable.c:79) 
[ 65.740668][ T759] ? __lock_acquire (kernel/locking/lockdep.c:5240) 
[ 65.740960][ T759] ? __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:113) 
[ 65.741245][ T759] ? __pfx___mutex_trylock_common (kernel/locking/mutex.c:88) 
[ 65.741608][ T759] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:745) 
[ 65.741897][ T759] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:745) 
[ 65.742185][ T759] ? trace_contention_end (./include/trace/events/lock.h:122 (discriminator 21)) 
[ 65.742479][ T759] ? __mutex_lock (./arch/x86/include/asm/preempt.h:104 kernel/locking/mutex.c:728 kernel/locking/mutex.c:747) 
[ 65.742773][ T759] ? find_held_lock (kernel/locking/lockdep.c:5353) 
[ 65.743060][ T759] ? rtnl_newlink (net/core/rtnetlink.c:343 net/core/rtnetlink.c:4056) 
[ 65.743343][ T759] ? __create_object (mm/kmemleak.c:771) 
[ 65.743639][ T759] ? __pfx___mutex_lock (kernel/locking/mutex.c:746) 
[ 65.743925][ T759] ? trace_cap_capable (./include/trace/events/capability.h:26 (discriminator 21)) 
[ 65.744213][ T759] ? _raw_spin_unlock_irqrestore (./arch/x86/include/asm/preempt.h:104 ./include/linux/spinlock_api_smp.h:152 kernel/locking/spinlock.c:194) 
[ 65.744576][ T759] ? __rtnl_newlink (net/core/rtnetlink.c:3907) 
[ 65.744874][ T759] rtnl_newlink (net/core/rtnetlink.c:351 net/core/rtnetlink.c:4058) 
[ 65.745165][ T759] ? __pfx_rtnl_newlink (net/core/rtnetlink.c:3948) 
[ 65.745450][ T759] ? __lock_acquire (kernel/locking/lockdep.c:5240) 
[ 65.745750][ T759] ? find_held_lock (kernel/locking/lockdep.c:5353) 
[ 65.746038][ T759] ? rtnetlink_rcv_msg (./include/linux/rcupdate.h:341 ./include/linux/rcupdate.h:871 net/core/rtnetlink.c:6944) 
[ 65.746322][ T759] ? __lock_release (kernel/locking/lockdep.c:5539) 
[ 65.746620][ T759] ? __pfx_rtnl_newlink (net/core/rtnetlink.c:3948) 
[ 65.746909][ T759] rtnetlink_rcv_msg (net/core/rtnetlink.c:6946) 
[ 65.747200][ T759] ? __pfx_rtnetlink_rcv_msg (net/core/rtnetlink.c:6849) 
[ 65.747496][ T759] ? __lock_acquire (kernel/locking/lockdep.c:5240) 
[ 65.747792][ T759] netlink_rcv_skb (net/netlink/af_netlink.c:2551) 
[ 65.748078][ T759] ? __pfx_rtnetlink_rcv_msg (net/core/rtnetlink.c:6849) 
[ 65.748367][ T759] ? __pfx_netlink_rcv_skb (net/netlink/af_netlink.c:2528) 
[ 65.748680][ T759] ? netlink_deliver_tap (./include/linux/rcupdate.h:341 ./include/linux/rcupdate.h:871 net/netlink/af_netlink.c:340) 
[ 65.748968][ T759] ? netlink_deliver_tap (./include/linux/rcupdate.h:341 ./include/linux/rcupdate.h:871 ./include/net/netns/generic.h:48 net/netlink/af_netlink.c:333) 
[ 65.749263][ T759] netlink_unicast (net/netlink/af_netlink.c:1320 net/netlink/af_netlink.c:1346) 
[ 65.749578][ T759] ? __pfx_netlink_unicast (net/netlink/af_netlink.c:1331) 
[ 65.749862][ T759] ? __lock_acquire (kernel/locking/lockdep.c:5240) 
[ 65.750153][ T759] netlink_sendmsg (net/netlink/af_netlink.c:1896) 
[ 65.750441][ T759] ? __pfx_netlink_sendmsg (net/netlink/af_netlink.c:1815) 
[ 65.750743][ T759] ? __import_iovec (lib/iov_iter.c:1441 lib/iov_iter.c:1456) 
[ 65.751036][ T759] ____sys_sendmsg (net/socket.c:714 net/socket.c:729 net/socket.c:2614) 
[ 65.751328][ T759] ? __pfx_____sys_sendmsg (net/socket.c:2560) 
[ 65.751628][ T759] ? __pfx_copy_msghdr_from_user (net/socket.c:2540) 
[ 65.751992][ T759] ___sys_sendmsg (net/socket.c:2670) 
[ 65.752277][ T759] ? kasan_record_aux_stack (mm/kasan/generic.c:548) 
[ 65.752572][ T759] ? __call_rcu_common.constprop.0 (./arch/x86/include/asm/irqflags.h:26 ./arch/x86/include/asm/irqflags.h:109 ./arch/x86/include/asm/irqflags.h:127 kernel/rcu/tree.c:3096) 
[ 65.752926][ T759] ? __pfx____sys_sendmsg (net/socket.c:2657) 
[ 65.753214][ T759] ? find_held_lock (kernel/locking/lockdep.c:5353) 
[ 65.753517][ T759] ? __lock_acquire (kernel/locking/lockdep.c:5240) 
[ 65.753808][ T759] ? find_held_lock (kernel/locking/lockdep.c:5353) 
[ 65.754095][ T759] ? __virt_addr_valid (./include/linux/rcupdate.h:341 ./include/linux/rcupdate.h:953 ./include/linux/mmzone.h:2168 arch/x86/mm/physaddr.c:65) 
[ 65.754378][ T759] ? __lock_release (kernel/locking/lockdep.c:5539) 
[ 65.754684][ T759] __sys_sendmsg (net/socket.c:2700) 
[ 65.754968][ T759] ? __call_rcu_common.constprop.0 (kernel/rcu/tree.c:3119) 
[ 65.755320][ T759] ? __pfx___sys_sendmsg (net/socket.c:2685) 
[ 65.755626][ T759] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:745) 
[ 65.755917][ T759] do_syscall_64 (arch/x86/entry/syscall_64.c:63 arch/x86/entry/syscall_64.c:94) 
[ 65.756202][ T759] entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:130) 
[   65.756567][  T759] RIP: 0033:0x7f5d3b75b1e7
[ 65.756860][ T759] Code: 0e 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:	0e                   	(bad)
   1:	00 f7                	add    %dh,%bh
   3:	d8 64 89 02          	fsubs  0x2(%rcx,%rcx,4)
   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)
[   65.757857][  T759] RSP: 002b:00007ffe3fee99e8 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
[   65.758283][  T759] RAX: ffffffffffffffda RBX: 00007ffe3feea110 RCX: 00007f5d3b75b1e7
[   65.758713][  T759] RDX: 0000000000000000 RSI: 00007ffe3fee9a50 RDI: 0000000000000005
[   65.759132][  T759] RBP: 0000000000000004 R08: 0000000000000003 R09: 0000000000000078
[   65.759584][  T759] R10: 00007f5d3b658ee8 R11: 0000000000000246 R12: 0000000000000004


Finger prints:
netif_set_mtu_ext:rtnl_newlink:rtnetlink_rcv_msg:netlink_rcv_skb:netlink_unicast