======================================
| [   42.556252][  T539] vxlan0: entered promiscuous mode
| [   42.559570][  T539] ------------[ cut here ]------------
| [ 42.559878][ T539] WARNING: CPU: 0 PID: 539 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) 
| [   42.561442][  T539] Modules linked in: vxlan pktgen
[   42.562358][  T539] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[ 42.562738][ T539] 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) 
[ 42.563049][ T539] Code: 00 00 8b 05 77 04 bc 02 85 c0 0f 84 52 fe ff ff 48 8d bb c0 0c 00 00 be ff ff ff ff e8 da fc 9b 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 77 04 bc 02    	mov    0x2bc0477(%rip),%eax        # 0x2bc047f
   8:	85 c0                	test   %eax,%eax
   a:	0f 84 52 fe ff ff    	je     0xfffffffffffffe62
  10:	48 8d bb c0 0c 00 00 	lea    0xcc0(%rbx),%rdi
  17:	be ff ff ff ff       	mov    $0xffffffff,%esi
  1c:	e8 da fc 9b 00       	call   0x9bfcfb
  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
[   42.564229][  T539] RSP: 0018:ffffc900004f6ef0 EFLAGS: 00010246
[   42.564610][  T539] RAX: 0000000000000000 RBX: ffff88800ecea000 RCX: 0000000000000001
[   42.565058][  T539] RDX: 0000000000000000 RSI: ffffffff86310751 RDI: ffffffff85a58280
[   42.565512][  T539] RBP: ffffc900004f6fd8 R08: 0000000000000000 R09: 0000000000000000
[   42.565967][  T539] R10: ffffc900004f7008 R11: ffffffff86d8d1e0 R12: 1ffff9200009ede2
[   42.566432][  T539] R13: 00000000000005aa R14: ffffc900004f7008 R15: ffff88800eceaf48
[   42.566878][  T539] FS:  00007f04553a9800(0000) GS:ffff8880e4599000(0000) knlGS:0000000000000000
[   42.567412][  T539] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[   42.567787][  T539] CR2: 00000000004e6888 CR3: 0000000011759001 CR4: 0000000000772ef0
[   42.568251][  T539] PKRU: 55555554
[   42.568477][  T539] Call Trace:
[   42.568702][  T539]  <TASK>
[ 42.568859][ T539] ? __pfx_netif_set_mtu_ext (net/core/dev.c:9607) 
[ 42.569169][ T539] ? __lock_acquire (kernel/locking/lockdep.c:5240) 
[ 42.569479][ T539] netif_set_mtu (net/core/dev.c:9652) 
[ 42.569780][ T539] ? __pfx_netif_set_mtu (net/core/dev.c:9647) 
[ 42.570111][ T539] dev_set_mtu (./include/net/netdev_lock.h:30 ./include/net/netdev_lock.h:47 net/core/dev_api.c:249) 
[ 42.570345][ T539] br_mtu_auto_adjust (net/bridge/br_if.c:525) 
[ 42.570646][ T539] br_add_if (net/bridge/br_if.c:697) 
[ 42.570883][ T539] do_set_master (./include/net/netdev_lock.h:30 ./include/net/netdev_lock.h:41 net/core/rtnetlink.c:2949) 
[ 42.571191][ T539] ? kernel_text_address (kernel/extable.c:97 kernel/extable.c:94) 
[ 42.571492][ T539] do_setlink.constprop.0 (net/core/rtnetlink.c:3150) 
[ 42.571796][ T539] ? __pfx_do_setlink.constprop.0 (net/core/rtnetlink.c:3021) 
[ 42.572183][ T539] ? rcu_read_lock_any_held (kernel/rcu/update.c:386 kernel/rcu/update.c:380) 
[ 42.572482][ T539] ? validate_chain (kernel/locking/lockdep.c:3804 kernel/locking/lockdep.c:3824 kernel/locking/lockdep.c:3879) 
[ 42.572775][ T539] ? __kernel_text_address (kernel/extable.c:79) 
[ 42.573087][ T539] ? __lock_acquire (kernel/locking/lockdep.c:5240) 
[ 42.573387][ T539] ? __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) 
[ 42.573682][ T539] ? __pfx___mutex_trylock_common (kernel/locking/mutex.c:88) 
[ 42.574050][ T539] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:745) 
[ 42.574367][ T539] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:745) 
[ 42.574667][ T539] ? trace_contention_end (./include/trace/events/lock.h:122 (discriminator 21)) 
[ 42.574965][ T539] ? __mutex_lock (./arch/x86/include/asm/preempt.h:104 kernel/locking/mutex.c:728 kernel/locking/mutex.c:747) 
[ 42.575275][ T539] ? find_held_lock (kernel/locking/lockdep.c:5353) 
[ 42.575572][ T539] ? rtnl_newlink (net/core/rtnetlink.c:343 net/core/rtnetlink.c:4056) 
[ 42.575865][ T539] ? __create_object (mm/kmemleak.c:771) 
[ 42.576171][ T539] ? __pfx___mutex_lock (kernel/locking/mutex.c:746) 
[ 42.576467][ T539] ? trace_cap_capable (./include/trace/events/capability.h:26 (discriminator 21)) 
[ 42.576766][ T539] ? _raw_spin_unlock_irqrestore (./arch/x86/include/asm/preempt.h:104 ./include/linux/spinlock_api_smp.h:152 kernel/locking/spinlock.c:194) 
[ 42.577141][ T539] ? __rtnl_newlink (net/core/rtnetlink.c:3907) 
[ 42.577447][ T539] rtnl_newlink (net/core/rtnetlink.c:351 net/core/rtnetlink.c:4058) 
[ 42.577751][ T539] ? __pfx_rtnl_newlink (net/core/rtnetlink.c:3948) 
[ 42.578047][ T539] ? __lock_acquire (kernel/locking/lockdep.c:5240) 
[ 42.578365][ T539] ? find_held_lock (kernel/locking/lockdep.c:5353) 
[ 42.578662][ T539] ? rtnetlink_rcv_msg (./include/linux/rcupdate.h:341 ./include/linux/rcupdate.h:871 net/core/rtnetlink.c:6944) 
[ 42.578956][ T539] ? __lock_release (kernel/locking/lockdep.c:5539) 
[ 42.579270][ T539] ? __pfx_rtnl_newlink (net/core/rtnetlink.c:3948) 
[ 42.579568][ T539] rtnetlink_rcv_msg (net/core/rtnetlink.c:6946) 
[ 42.579866][ T539] ? __pfx_rtnetlink_rcv_msg (net/core/rtnetlink.c:6849) 
[ 42.580180][ T539] ? __lock_acquire (kernel/locking/lockdep.c:5240) 
[ 42.580488][ T539] netlink_rcv_skb (net/netlink/af_netlink.c:2551) 
[ 42.580784][ T539] ? __pfx_rtnetlink_rcv_msg (net/core/rtnetlink.c:6849) 
[ 42.581095][ T539] ? __pfx_netlink_rcv_skb (net/netlink/af_netlink.c:2528) 
[ 42.581408][ T539] ? netlink_deliver_tap (./include/linux/rcupdate.h:341 ./include/linux/rcupdate.h:871 net/netlink/af_netlink.c:340) 
[ 42.581705][ T539] ? 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) 
[ 42.582004][ T539] netlink_unicast (net/netlink/af_netlink.c:1321 net/netlink/af_netlink.c:1346) 
[ 42.582333][ T539] ? __pfx_netlink_unicast (net/netlink/af_netlink.c:1331) 
[ 42.582641][ T539] ? __lock_acquire (kernel/locking/lockdep.c:5240) 
[ 42.582941][ T539] netlink_sendmsg (net/netlink/af_netlink.c:1896) 
[ 42.583254][ T539] ? __pfx_netlink_sendmsg (net/netlink/af_netlink.c:1815) 
[ 42.583558][ T539] ? __import_iovec (lib/iov_iter.c:1441 lib/iov_iter.c:1456) 
[ 42.583886][ T539] ____sys_sendmsg (net/socket.c:714 net/socket.c:729 net/socket.c:2614) 
[ 42.584198][ T539] ? __pfx_____sys_sendmsg (net/socket.c:2560) 
[ 42.584496][ T539] ? __pfx_copy_msghdr_from_user (net/socket.c:2540) 
[ 42.584877][ T539] ___sys_sendmsg (net/socket.c:2670) 
[ 42.585180][ T539] ? kasan_record_aux_stack (mm/kasan/generic.c:548) 
[ 42.585476][ T539] ? __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) 
[ 42.585851][ T539] ? __pfx____sys_sendmsg (net/socket.c:2657) 
[ 42.586162][ T539] ? find_held_lock (kernel/locking/lockdep.c:5353) 
[ 42.586464][ T539] ? __lock_acquire (kernel/locking/lockdep.c:5240) 
[ 42.586765][ T539] ? find_held_lock (kernel/locking/lockdep.c:5353) 
[ 42.587060][ T539] ? __virt_addr_valid (./include/linux/rcupdate.h:341 ./include/linux/rcupdate.h:953 ./include/linux/mmzone.h:2168 arch/x86/mm/physaddr.c:65) 
[ 42.587371][ T539] ? __lock_release (kernel/locking/lockdep.c:5539) 
[ 42.587676][ T539] __sys_sendmsg (net/socket.c:2700) 
[ 42.587970][ T539] ? __call_rcu_common.constprop.0 (kernel/rcu/tree.c:3119) 
[ 42.588350][ T539] ? __pfx___sys_sendmsg (net/socket.c:2685) 
[ 42.588660][ T539] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:745) 
[ 42.588957][ T539] do_syscall_64 (arch/x86/entry/syscall_64.c:63 arch/x86/entry/syscall_64.c:94) 
[ 42.589264][ T539] entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:130) 
[   42.589631][  T539] RIP: 0033:0x7f04555761e7
[ 42.589950][ T539] 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)
[   42.591263][  T539] RSP: 002b:00007fffc82ddb38 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
[   42.591727][  T539] RAX: ffffffffffffffda RBX: 00007fffc82de270 RCX: 00007f04555761e7
[   42.592188][  T539] RDX: 0000000000000000 RSI: 00007fffc82ddba0 RDI: 0000000000000005
[   42.592650][  T539] RBP: 0000000000000003 R08: 0000000000000003 R09: 0000000000000000
[   42.593101][  T539] R10: 0000000004484910 R11: 0000000000000246 R12: 0000000000000003
[   42.593548][  T539] R13: 00000000686e77c0 R14: 0000000000499600 R15: 0000000000000000
| [   43.945018][  T550] ------------[ cut here ]------------
| [ 43.945381][ T550] WARNING: CPU: 2 PID: 550 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) 
| [   43.946004][  T550] Modules linked in: vxlan pktgen
| [   43.947032][  T550] Tainted: [W]=WARN
[   43.947312][  T550] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[ 43.947719][ T550] 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) 
[ 43.948054][ T550] Code: 00 00 8b 05 77 04 bc 02 85 c0 0f 84 52 fe ff ff 48 8d bb c0 0c 00 00 be ff ff ff ff e8 da fc 9b 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 77 04 bc 02    	mov    0x2bc0477(%rip),%eax        # 0x2bc047f
   8:	85 c0                	test   %eax,%eax
   a:	0f 84 52 fe ff ff    	je     0xfffffffffffffe62
  10:	48 8d bb c0 0c 00 00 	lea    0xcc0(%rbx),%rdi
  17:	be ff ff ff ff       	mov    $0xffffffff,%esi
  1c:	e8 da fc 9b 00       	call   0x9bfcfb
  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
[   43.949175][  T550] RSP: 0018:ffffc900005d6ef0 EFLAGS: 00010246
[   43.949584][  T550] RAX: 0000000000000000 RBX: ffff88800e8ea000 RCX: 0000000000000001
[   43.950057][  T550] RDX: 0000000000000000 RSI: ffffffff86310751 RDI: ffffffff85a58280
[   43.950591][  T550] RBP: ffffc900005d6fd8 R08: 0000000000000000 R09: 0000000000000000
[   43.951105][  T550] R10: ffffc900005d7008 R11: ffffffff86d8d1e0 R12: 1ffff920000bade2
[   43.951586][  T550] R13: 00000000000005aa R14: ffffc900005d7008 R15: ffff88800e8eaf48
[   43.952061][  T550] FS:  00007fc57cc04800(0000) GS:ffff8880e4699000(0000) knlGS:0000000000000000
[   43.952628][  T550] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[   43.953029][  T550] CR2: 00000000004e6888 CR3: 000000000b7b4005 CR4: 0000000000772ef0
[   43.953517][  T550] PKRU: 55555554
[   43.953767][  T550] Call Trace:
[   43.954013][  T550]  <TASK>
[ 43.954196][ T550] ? __pfx_netif_set_mtu_ext (net/core/dev.c:9607) 
[ 43.954522][ T550] ? __lock_acquire (kernel/locking/lockdep.c:5240) 
[ 43.954861][ T550] netif_set_mtu (net/core/dev.c:9652) 
[ 43.955209][ T550] ? __pfx_netif_set_mtu (net/core/dev.c:9647) 
[ 43.955550][ T550] dev_set_mtu (./include/net/netdev_lock.h:30 ./include/net/netdev_lock.h:47 net/core/dev_api.c:249) 
[ 43.955798][ T550] br_mtu_auto_adjust (net/bridge/br_if.c:525) 
[ 43.956143][ T550] br_add_if (net/bridge/br_if.c:697) 
[ 43.956400][ T550] do_set_master (./include/net/netdev_lock.h:30 ./include/net/netdev_lock.h:41 net/core/rtnetlink.c:2949) 
[ 43.956720][ T550] ? kernel_text_address (kernel/extable.c:97 kernel/extable.c:94) 
[ 43.957045][ T550] do_setlink.constprop.0 (net/core/rtnetlink.c:3150) 
[ 43.957385][ T550] ? __pfx_do_setlink.constprop.0 (net/core/rtnetlink.c:3021) 
[ 43.957789][ T550] ? rcu_read_lock_any_held (kernel/rcu/update.c:386 kernel/rcu/update.c:380) 
[ 43.958137][ T550] ? validate_chain (kernel/locking/lockdep.c:3804 kernel/locking/lockdep.c:3824 kernel/locking/lockdep.c:3879) 
[ 43.958469][ T550] ? __kernel_text_address (kernel/extable.c:79) 
[ 43.958796][ T550] ? __lock_acquire (kernel/locking/lockdep.c:5240) 
[ 43.959143][ T550] ? __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) 
[ 43.959474][ T550] ? __pfx___mutex_trylock_common (kernel/locking/mutex.c:88) 
[ 43.959868][ T550] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:745) 
[ 43.960204][ T550] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:745) 
[ 43.960540][ T550] ? trace_contention_end (./include/trace/events/lock.h:122 (discriminator 21)) 
[ 43.960868][ T550] ? __mutex_lock (./arch/x86/include/asm/preempt.h:104 kernel/locking/mutex.c:728 kernel/locking/mutex.c:747) 
[ 43.961202][ T550] ? find_held_lock (kernel/locking/lockdep.c:5353) 
[ 43.961525][ T550] ? rtnl_newlink (net/core/rtnetlink.c:343 net/core/rtnetlink.c:4056) 
[ 43.961840][ T550] ? __create_object (mm/kmemleak.c:771) 
[ 43.962171][ T550] ? __pfx___mutex_lock (kernel/locking/mutex.c:746) 
[ 43.962493][ T550] ? trace_cap_capable (./include/trace/events/capability.h:26 (discriminator 21)) 
[ 43.962818][ T550] ? _raw_spin_unlock_irqrestore (./arch/x86/include/asm/preempt.h:104 ./include/linux/spinlock_api_smp.h:152 kernel/locking/spinlock.c:194) 
[ 43.963237][ T550] ? __rtnl_newlink (net/core/rtnetlink.c:3907) 
[ 43.963576][ T550] rtnl_newlink (net/core/rtnetlink.c:351 net/core/rtnetlink.c:4058) 
[ 43.963900][ T550] ? __pfx_rtnl_newlink (net/core/rtnetlink.c:3948) 
[ 43.964234][ T550] ? __lock_acquire (kernel/locking/lockdep.c:5240) 
[ 43.964564][ T550] ? find_held_lock (kernel/locking/lockdep.c:5353) 
[ 43.964887][ T550] ? rtnetlink_rcv_msg (./include/linux/rcupdate.h:341 ./include/linux/rcupdate.h:871 net/core/rtnetlink.c:6944) 
[ 43.965216][ T550] ? __lock_release (kernel/locking/lockdep.c:5539) 
[ 43.965543][ T550] ? __pfx_rtnl_newlink (net/core/rtnetlink.c:3948) 
[ 43.965861][ T550] rtnetlink_rcv_msg (net/core/rtnetlink.c:6946) 
[ 43.966216][ T550] ? __pfx_rtnetlink_rcv_msg (net/core/rtnetlink.c:6849) 
[ 43.966547][ T550] ? __lock_acquire (kernel/locking/lockdep.c:5240) 
[ 43.966873][ T550] netlink_rcv_skb (net/netlink/af_netlink.c:2551) 
[ 43.967212][ T550] ? __pfx_rtnetlink_rcv_msg (net/core/rtnetlink.c:6849) 
[ 43.967540][ T550] ? __pfx_netlink_rcv_skb (net/netlink/af_netlink.c:2528) 
[ 43.967871][ T550] ? netlink_deliver_tap (./include/linux/rcupdate.h:341 ./include/linux/rcupdate.h:871 net/netlink/af_netlink.c:340) 
[ 43.968202][ T550] ? 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) 
[ 43.968529][ T550] netlink_unicast (net/netlink/af_netlink.c:1321 net/netlink/af_netlink.c:1346) 
[ 43.968853][ T550] ? __pfx_netlink_unicast (net/netlink/af_netlink.c:1331) 
[ 43.969181][ T550] ? __lock_acquire (kernel/locking/lockdep.c:5240) 
[ 43.969509][ T550] netlink_sendmsg (net/netlink/af_netlink.c:1896) 
[ 43.969833][ T550] ? __pfx_netlink_sendmsg (net/netlink/af_netlink.c:1815) 
[ 43.970168][ T550] ? __import_iovec (lib/iov_iter.c:1441 lib/iov_iter.c:1456) 
[ 43.970506][ T550] ____sys_sendmsg (net/socket.c:714 net/socket.c:729 net/socket.c:2614) 
[ 43.970841][ T550] ? __pfx_____sys_sendmsg (net/socket.c:2560) 
[ 43.971187][ T550] ? __pfx_copy_msghdr_from_user (net/socket.c:2540) 
[ 43.971597][ T550] ___sys_sendmsg (net/socket.c:2670) 
[ 43.971917][ T550] ? kasan_record_aux_stack (mm/kasan/generic.c:548) 
[ 43.972252][ T550] ? __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) 
[ 43.972650][ T550] ? __pfx____sys_sendmsg (net/socket.c:2657) 
[ 43.972977][ T550] ? find_held_lock (kernel/locking/lockdep.c:5353) 
[ 43.973318][ T550] ? __lock_acquire (kernel/locking/lockdep.c:5240) 
[ 43.973646][ T550] ? find_held_lock (kernel/locking/lockdep.c:5353) 
[ 43.973967][ T550] ? __virt_addr_valid (./include/linux/rcupdate.h:341 ./include/linux/rcupdate.h:953 ./include/linux/mmzone.h:2168 arch/x86/mm/physaddr.c:65) 
[ 43.974304][ T550] ? __lock_release (kernel/locking/lockdep.c:5539) 
[ 43.974640][ T550] __sys_sendmsg (net/socket.c:2700) 
[ 43.974957][ T550] ? __call_rcu_common.constprop.0 (kernel/rcu/tree.c:3119) 
[ 43.975375][ T550] ? __pfx___sys_sendmsg (net/socket.c:2685) 
[ 43.975722][ T550] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:745) 
[ 43.976043][ T550] do_syscall_64 (arch/x86/entry/syscall_64.c:63 arch/x86/entry/syscall_64.c:94) 
[ 43.976382][ T550] entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:130) 
[   43.976774][  T550] RIP: 0033:0x7fc57cdd11e7
[ 43.977110][ T550] 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)
[   43.978232][  T550] RSP: 002b:00007ffc24312618 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
[   43.978713][  T550] RAX: ffffffffffffffda RBX: 00007ffc24312d50 RCX: 00007fc57cdd11e7
[   43.979210][  T550] RDX: 0000000000000000 RSI: 00007ffc24312680 RDI: 0000000000000005
[   43.979689][  T550] RBP: 0000000000000003 R08: 0000000000000003 R09: 0000000000000000
[   43.980176][  T550] R10: 000000002fbcf910 R11: 0000000000000246 R12: 0000000000000003
[   43.980665][  T550] R13: 00000000686e77c1 R14: 0000000000499600 R15: 0000000000000000
| [   44.741001][  T557] ------------[ cut here ]------------
| [ 44.741347][ T557] WARNING: CPU: 3 PID: 557 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) 
| [   44.741973][  T557] Modules linked in: vxlan pktgen
| [   44.743577][  T557] Tainted: [W]=WARN
[   44.743815][  T557] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[ 44.744217][ T557] 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) 
[ 44.744541][ T557] Code: 00 00 8b 05 77 04 bc 02 85 c0 0f 84 52 fe ff ff 48 8d bb c0 0c 00 00 be ff ff ff ff e8 da fc 9b 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 77 04 bc 02    	mov    0x2bc0477(%rip),%eax        # 0x2bc047f
   8:	85 c0                	test   %eax,%eax
   a:	0f 84 52 fe ff ff    	je     0xfffffffffffffe62
  10:	48 8d bb c0 0c 00 00 	lea    0xcc0(%rbx),%rdi
  17:	be ff ff ff ff       	mov    $0xffffffff,%esi
  1c:	e8 da fc 9b 00       	call   0x9bfcfb
  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
[   44.745677][  T557] RSP: 0018:ffffc90000606ef0 EFLAGS: 00010246
[   44.746083][  T557] RAX: 0000000000000000 RBX: ffff88800ecea000 RCX: 0000000000000001
[   44.746549][  T557] RDX: 0000000000000000 RSI: ffffffff86310751 RDI: ffffffff85a58280
[   44.747029][  T557] RBP: ffffc90000606fd8 R08: 0000000000000000 R09: 0000000000000000
[   44.747514][  T557] R10: ffffc90000607008 R11: ffffffff876ceab8 R12: 1ffff920000c0de2
[   44.747985][  T557] R13: 00000000000005aa R14: ffffc90000607008 R15: ffff88800eceaf48
[   44.748454][  T557] FS:  00007f7ac9c92800(0000) GS:ffff8880e4719000(0000) knlGS:0000000000000000
[   44.749004][  T557] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[   44.749414][  T557] CR2: 00000000004e6888 CR3: 000000000caff006 CR4: 0000000000772ef0
[   44.749884][  T557] PKRU: 55555554
[   44.750127][  T557] Call Trace:
[   44.750365][  T557]  <TASK>
[ 44.750531][ T557] ? __pfx_netif_set_mtu_ext (net/core/dev.c:9607) 
[ 44.750854][ T557] ? mark_held_locks (kernel/locking/lockdep.c:4328) 
[ 44.751180][ T557] ? _raw_spin_unlock_irqrestore (./include/linux/spinlock_api_smp.h:151 kernel/locking/spinlock.c:194) 
[ 44.751574][ T557] ? lockdep_hardirqs_on (kernel/locking/lockdep.c:4475) 
[ 44.751894][ T557] netif_set_mtu (net/core/dev.c:9652) 
[ 44.752219][ T557] ? __pfx_netif_set_mtu (net/core/dev.c:9647) 
[ 44.752554][ T557] ? br_get_link_af_size_filtered (net/bridge/br_netlink.c:116) 
[ 44.752946][ T557] dev_set_mtu (./include/net/netdev_lock.h:30 ./include/net/netdev_lock.h:47 net/core/dev_api.c:249) 
[ 44.753193][ T557] br_mtu_auto_adjust (net/bridge/br_if.c:525) 
[ 44.753510][ T557] br_add_if (net/bridge/br_if.c:697) 
[ 44.753758][ T557] do_set_master (./include/net/netdev_lock.h:30 ./include/net/netdev_lock.h:41 net/core/rtnetlink.c:2949) 
[ 44.754077][ T557] ? kernel_text_address (kernel/extable.c:97 kernel/extable.c:94) 
[ 44.754394][ T557] do_setlink.constprop.0 (net/core/rtnetlink.c:3150) 
[ 44.754715][ T557] ? __pfx_do_setlink.constprop.0 (net/core/rtnetlink.c:3021) 
[ 44.755120][ T557] ? rcu_read_lock_any_held (kernel/rcu/update.c:386 kernel/rcu/update.c:380) 
[ 44.755439][ T557] ? validate_chain (kernel/locking/lockdep.c:3804 kernel/locking/lockdep.c:3824 kernel/locking/lockdep.c:3879) 
[ 44.755753][ T557] ? __kernel_text_address (kernel/extable.c:79) 
[ 44.756083][ T557] ? __lock_acquire (kernel/locking/lockdep.c:5240) 
[ 44.756398][ T557] ? __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) 
[ 44.756710][ T557] ? __pfx___mutex_trylock_common (kernel/locking/mutex.c:88) 
[ 44.757107][ T557] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:745) 
[ 44.757431][ T557] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:745) 
[ 44.757743][ T557] ? trace_contention_end (./include/trace/events/lock.h:122 (discriminator 21)) 
[ 44.758057][ T557] ? __mutex_lock (./arch/x86/include/asm/preempt.h:104 kernel/locking/mutex.c:728 kernel/locking/mutex.c:747) 
[ 44.758382][ T557] ? find_held_lock (kernel/locking/lockdep.c:5353) 
[ 44.758693][ T557] ? rtnl_newlink (net/core/rtnetlink.c:343 net/core/rtnetlink.c:4056) 
[ 44.758997][ T557] ? __create_object (mm/kmemleak.c:771) 
[ 44.759320][ T557] ? __pfx___mutex_lock (kernel/locking/mutex.c:746) 
[ 44.759634][ T557] ? trace_cap_capable (./include/trace/events/capability.h:26 (discriminator 21)) 
[ 44.759954][ T557] ? _raw_spin_unlock_irqrestore (./arch/x86/include/asm/preempt.h:104 ./include/linux/spinlock_api_smp.h:152 kernel/locking/spinlock.c:194) 
[ 44.760364][ T557] ? __rtnl_newlink (net/core/rtnetlink.c:3907) 
[ 44.760685][ T557] rtnl_newlink (net/core/rtnetlink.c:351 net/core/rtnetlink.c:4058) 
[ 44.761001][ T557] ? __pfx_rtnl_newlink (net/core/rtnetlink.c:3948) 
[ 44.761322][ T557] ? __lock_acquire (kernel/locking/lockdep.c:5240) 
[ 44.761639][ T557] ? find_held_lock (kernel/locking/lockdep.c:5353) 
[ 44.761951][ T557] ? rtnetlink_rcv_msg (./include/linux/rcupdate.h:341 ./include/linux/rcupdate.h:871 net/core/rtnetlink.c:6944) 
[ 44.762272][ T557] ? __lock_release (kernel/locking/lockdep.c:5539) 
[ 44.762591][ T557] ? __pfx_rtnl_newlink (net/core/rtnetlink.c:3948) 
[ 44.762895][ T557] rtnetlink_rcv_msg (net/core/rtnetlink.c:6946) 
[ 44.763217][ T557] ? __pfx_rtnetlink_rcv_msg (net/core/rtnetlink.c:6849) 
[ 44.763536][ T557] ? __lock_acquire (kernel/locking/lockdep.c:5240) 
[ 44.763855][ T557] netlink_rcv_skb (net/netlink/af_netlink.c:2551) 
[ 44.764177][ T557] ? __pfx_rtnetlink_rcv_msg (net/core/rtnetlink.c:6849) 
[ 44.764494][ T557] ? __pfx_netlink_rcv_skb (net/netlink/af_netlink.c:2528) 
[ 44.764820][ T557] ? netlink_deliver_tap (./include/linux/rcupdate.h:341 ./include/linux/rcupdate.h:871 net/netlink/af_netlink.c:340) 
[ 44.765142][ T557] ? 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) 
[ 44.765455][ T557] netlink_unicast (net/netlink/af_netlink.c:1321 net/netlink/af_netlink.c:1346) 
[ 44.765771][ T557] ? __pfx_netlink_unicast (net/netlink/af_netlink.c:1331) 
[ 44.766126][ T557] ? __lock_acquire (kernel/locking/lockdep.c:5240) 
[ 44.766453][ T557] netlink_sendmsg (net/netlink/af_netlink.c:1896) 
[ 44.766772][ T557] ? __pfx_netlink_sendmsg (net/netlink/af_netlink.c:1815) 
[ 44.767096][ T557] ? __import_iovec (lib/iov_iter.c:1441 lib/iov_iter.c:1456) 
[ 44.767423][ T557] ____sys_sendmsg (net/socket.c:714 net/socket.c:729 net/socket.c:2614) 
[ 44.767741][ T557] ? __pfx_____sys_sendmsg (net/socket.c:2560) 
[ 44.768053][ T557] ? __pfx_copy_msghdr_from_user (net/socket.c:2540) 
[ 44.768466][ T557] ___sys_sendmsg (net/socket.c:2670) 
[ 44.768779][ T557] ? kasan_record_aux_stack (mm/kasan/generic.c:548) 
[ 44.769096][ T557] ? __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) 
[ 44.769489][ T557] ? __pfx____sys_sendmsg (net/socket.c:2657) 
[ 44.769811][ T557] ? find_held_lock (kernel/locking/lockdep.c:5353) 
[ 44.770136][ T557] ? __lock_acquire (kernel/locking/lockdep.c:5240) 
[ 44.770461][ T557] ? find_held_lock (kernel/locking/lockdep.c:5353) 
[ 44.770773][ T557] ? __virt_addr_valid (./include/linux/rcupdate.h:341 ./include/linux/rcupdate.h:953 ./include/linux/mmzone.h:2168 arch/x86/mm/physaddr.c:65) 
[ 44.771097][ T557] ? __lock_release (kernel/locking/lockdep.c:5539) 
[ 44.771418][ T557] __sys_sendmsg (net/socket.c:2700) 
[ 44.771727][ T557] ? __call_rcu_common.constprop.0 (kernel/rcu/tree.c:3119) 
[ 44.772129][ T557] ? __pfx___sys_sendmsg (net/socket.c:2685) 
[ 44.772460][ T557] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:745) 
[ 44.772778][ T557] do_syscall_64 (arch/x86/entry/syscall_64.c:63 arch/x86/entry/syscall_64.c:94) 
[ 44.773104][ T557] entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:130) 
[   44.773494][  T557] RIP: 0033:0x7f7ac9e5f1e7
[ 44.773816][ T557] 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)
[   44.774954][  T557] RSP: 002b:00007ffec5df9a18 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
[   44.775435][  T557] RAX: ffffffffffffffda RBX: 00007ffec5dfa150 RCX: 00007f7ac9e5f1e7
[   44.775908][  T557] RDX: 0000000000000000 RSI: 00007ffec5df9a80 RDI: 0000000000000005
[   44.776389][  T557] RBP: 0000000000000003 R08: 0000000000000003 R09: 0000000000000000
[   44.776869][  T557] R10: 00000000250b5910 R11: 0000000000000246 R12: 0000000000000003
[   44.777342][  T557] R13: 00000000686e77c2 R14: 0000000000499600 R15: 0000000000000000
| [   45.851815][  T567] ------------[ cut here ]------------
| [ 45.852145][ T567] WARNING: CPU: 3 PID: 567 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) 
| [   45.852771][  T567] Modules linked in: vxlan pktgen
| [   45.853744][  T567] Tainted: [W]=WARN
[   45.853982][  T567] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[ 45.854382][ T567] 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) 
[ 45.854710][ T567] Code: 00 00 8b 05 77 04 bc 02 85 c0 0f 84 52 fe ff ff 48 8d bb c0 0c 00 00 be ff ff ff ff e8 da fc 9b 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 77 04 bc 02    	mov    0x2bc0477(%rip),%eax        # 0x2bc047f
   8:	85 c0                	test   %eax,%eax
   a:	0f 84 52 fe ff ff    	je     0xfffffffffffffe62
  10:	48 8d bb c0 0c 00 00 	lea    0xcc0(%rbx),%rdi
  17:	be ff ff ff ff       	mov    $0xffffffff,%esi
  1c:	e8 da fc 9b 00       	call   0x9bfcfb
  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
[   45.855846][  T567] RSP: 0018:ffffc90000636ef0 EFLAGS: 00010246
[   45.856250][  T567] RAX: 0000000000000000 RBX: ffff88800e8ea000 RCX: 0000000000000001
[   45.856732][  T567] RDX: 0000000000000000 RSI: ffffffff86310751 RDI: ffffffff85a58280
[   45.857223][  T567] RBP: ffffc90000636fd8 R08: 0000000000000000 R09: 0000000000000000
[   45.857687][  T567] R10: ffffc90000637008 R11: ffffffff876ceab8 R12: 1ffff920000c6de2
[   45.858176][  T567] R13: 00000000000005aa R14: ffffc90000637008 R15: ffff88800e8eaf48
[   45.858643][  T567] FS:  00007fb4ee4eb800(0000) GS:ffff8880e4719000(0000) knlGS:0000000000000000
[   45.859198][  T567] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[   45.859598][  T567] CR2: 00000000004e6888 CR3: 00000000117e3001 CR4: 0000000000772ef0
[   45.860062][  T567] PKRU: 55555554
[   45.860304][  T567] Call Trace:
[   45.860556][  T567]  <TASK>
[ 45.860718][ T567] ? __pfx_netif_set_mtu_ext (net/core/dev.c:9607) 
[ 45.861031][ T567] ? mark_held_locks (kernel/locking/lockdep.c:4328) 
[ 45.861351][ T567] ? _raw_spin_unlock_irqrestore (./include/linux/spinlock_api_smp.h:151 kernel/locking/spinlock.c:194) 
[ 45.861741][ T567] ? lockdep_hardirqs_on (kernel/locking/lockdep.c:4475) 
[ 45.862058][ T567] netif_set_mtu (net/core/dev.c:9652) 
[ 45.862378][ T567] ? __pfx_netif_set_mtu (net/core/dev.c:9647) 
[ 45.862702][ T567] ? br_get_link_af_size_filtered (net/bridge/br_netlink.c:116) 
[ 45.863105][ T567] dev_set_mtu (./include/net/netdev_lock.h:30 ./include/net/netdev_lock.h:47 net/core/dev_api.c:249) 
[ 45.863341][ T567] br_mtu_auto_adjust (net/bridge/br_if.c:525) 
[ 45.863658][ T567] br_add_if (net/bridge/br_if.c:697) 
[ 45.863906][ T567] do_set_master (./include/net/netdev_lock.h:30 ./include/net/netdev_lock.h:41 net/core/rtnetlink.c:2949) 
[ 45.864227][ T567] ? kernel_text_address (kernel/extable.c:97 kernel/extable.c:94) 
[ 45.864548][ T567] do_setlink.constprop.0 (net/core/rtnetlink.c:3150) 
[ 45.864869][ T567] ? __pfx_do_setlink.constprop.0 (net/core/rtnetlink.c:3021) 
[ 45.865271][ T567] ? rcu_read_lock_any_held (kernel/rcu/update.c:386 kernel/rcu/update.c:380) 
[ 45.865586][ T567] ? validate_chain (kernel/locking/lockdep.c:3804 kernel/locking/lockdep.c:3824 kernel/locking/lockdep.c:3879) 
[ 45.865896][ T567] ? __kernel_text_address (kernel/extable.c:79) 
[ 45.866222][ T567] ? __lock_acquire (kernel/locking/lockdep.c:5240) 
[ 45.866541][ T567] ? __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) 
[ 45.866867][ T567] ? __pfx___mutex_trylock_common (kernel/locking/mutex.c:88) 
[ 45.867264][ T567] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:745) 
[ 45.867582][ T567] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:745) 
[ 45.867893][ T567] ? trace_contention_end (./include/trace/events/lock.h:122 (discriminator 21)) 
[ 45.868214][ T567] ? __mutex_lock (./arch/x86/include/asm/preempt.h:104 kernel/locking/mutex.c:728 kernel/locking/mutex.c:747) 
[ 45.868533][ T567] ? find_held_lock (kernel/locking/lockdep.c:5353) 
[ 45.868848][ T567] ? rtnl_newlink (net/core/rtnetlink.c:343 net/core/rtnetlink.c:4056) 
[ 45.869170][ T567] ? __create_object (mm/kmemleak.c:771) 
[ 45.869486][ T567] ? __pfx___mutex_lock (kernel/locking/mutex.c:746) 
[ 45.869802][ T567] ? trace_cap_capable (./include/trace/events/capability.h:26 (discriminator 21)) 
[ 45.870136][ T567] ? _raw_spin_unlock_irqrestore (./arch/x86/include/asm/preempt.h:104 ./include/linux/spinlock_api_smp.h:152 kernel/locking/spinlock.c:194) 
[ 45.870534][ T567] ? __rtnl_newlink (net/core/rtnetlink.c:3907) 
[ 45.870857][ T567] rtnl_newlink (net/core/rtnetlink.c:351 net/core/rtnetlink.c:4058) 
[ 45.871189][ T567] ? __pfx_rtnl_newlink (net/core/rtnetlink.c:3948) 
[ 45.871504][ T567] ? __lock_acquire (kernel/locking/lockdep.c:5240) 
[ 45.871838][ T567] ? find_held_lock (kernel/locking/lockdep.c:5353) 
[ 45.872159][ T567] ? rtnetlink_rcv_msg (./include/linux/rcupdate.h:341 ./include/linux/rcupdate.h:871 net/core/rtnetlink.c:6944) 
[ 45.872482][ T567] ? __lock_release (kernel/locking/lockdep.c:5539) 
[ 45.872798][ T567] ? __pfx_rtnl_newlink (net/core/rtnetlink.c:3948) 
[ 45.873120][ T567] rtnetlink_rcv_msg (net/core/rtnetlink.c:6946) 
[ 45.873437][ T567] ? __pfx_rtnetlink_rcv_msg (net/core/rtnetlink.c:6849) 
[ 45.873753][ T567] ? __lock_acquire (kernel/locking/lockdep.c:5240) 
[ 45.874075][ T567] netlink_rcv_skb (net/netlink/af_netlink.c:2551) 
[ 45.874386][ T567] ? __pfx_rtnetlink_rcv_msg (net/core/rtnetlink.c:6849) 
[ 45.874704][ T567] ? __pfx_netlink_rcv_skb (net/netlink/af_netlink.c:2528) 
[ 45.875034][ T567] ? netlink_deliver_tap (./include/linux/rcupdate.h:341 ./include/linux/rcupdate.h:871 net/netlink/af_netlink.c:340) 
[ 45.875353][ T567] ? 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) 
[ 45.875664][ T567] netlink_unicast (net/netlink/af_netlink.c:1321 net/netlink/af_netlink.c:1346) 
[ 45.875978][ T567] ? __pfx_netlink_unicast (net/netlink/af_netlink.c:1331) 
[ 45.876297][ T567] ? __lock_acquire (kernel/locking/lockdep.c:5240) 
[ 45.876623][ T567] netlink_sendmsg (net/netlink/af_netlink.c:1896) 
[ 45.876942][ T567] ? __pfx_netlink_sendmsg (net/netlink/af_netlink.c:1815) 
[ 45.877266][ T567] ? __import_iovec (lib/iov_iter.c:1441 lib/iov_iter.c:1456) 
[ 45.877601][ T567] ____sys_sendmsg (net/socket.c:714 net/socket.c:729 net/socket.c:2614) 
[ 45.877920][ T567] ? __pfx_____sys_sendmsg (net/socket.c:2560) 
[ 45.878243][ T567] ? __pfx_copy_msghdr_from_user (net/socket.c:2540) 
[ 45.878650][ T567] ___sys_sendmsg (net/socket.c:2670) 
[ 45.878961][ T567] ? kasan_record_aux_stack (mm/kasan/generic.c:548) 
[ 45.879285][ T567] ? __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) 
[ 45.879680][ T567] ? __pfx____sys_sendmsg (net/socket.c:2657) 
[ 45.880003][ T567] ? find_held_lock (kernel/locking/lockdep.c:5353) 
[ 45.880337][ T567] ? __lock_acquire (kernel/locking/lockdep.c:5240) 
[ 45.880878][ T567] ? find_held_lock (kernel/locking/lockdep.c:5353) 
[ 45.881203][ T567] ? __virt_addr_valid (./include/linux/rcupdate.h:341 ./include/linux/rcupdate.h:953 ./include/linux/mmzone.h:2168 arch/x86/mm/physaddr.c:65) 
[ 45.881522][ T567] ? __lock_release (kernel/locking/lockdep.c:5539) 
[ 45.881843][ T567] __sys_sendmsg (net/socket.c:2700) 
[ 45.882590][ T567] ? __call_rcu_common.constprop.0 (kernel/rcu/tree.c:3119) 
[ 45.882980][ T567] ? __pfx___sys_sendmsg (net/socket.c:2685) 
[ 45.883326][ T567] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:745) 
[ 45.883644][ T567] do_syscall_64 (arch/x86/entry/syscall_64.c:63 arch/x86/entry/syscall_64.c:94) 
[ 45.883961][ T567] entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:130) 
[   45.884361][  T567] RIP: 0033:0x7fb4ee6b81e7
[ 45.884687][ T567] 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)
[   45.885833][  T567] RSP: 002b:00007ffddb4b3328 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
[   45.886325][  T567] RAX: ffffffffffffffda RBX: 00007ffddb4b3a60 RCX: 00007fb4ee6b81e7
[   45.886806][  T567] RDX: 0000000000000000 RSI: 00007ffddb4b3390 RDI: 0000000000000005
[   45.887291][  T567] RBP: 0000000000000003 R08: 0000000000000003 R09: 0000000000000000
[   45.887776][  T567] R10: 0000000006362910 R11: 0000000000000246 R12: 0000000000000003
[   45.888259][  T567] R13: 00000000686e77c3 R14: 0000000000499600 R15: 0000000000000000
| [   50.040429][   T67] ------------[ cut here ]------------
| [ 50.040778][ T67] WARNING: CPU: 2 PID: 67 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) 
| [   50.042146][   T67] Modules linked in: vxlan pktgen
| [   50.043424][   T67] Tainted: [W]=WARN
[   50.043673][   T67] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[   50.044086][   T67] Workqueue: netns cleanup_net
[ 50.044440][ T67] 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) 
[ 50.044777][ T67] Code: 00 00 8b 05 77 04 bc 02 85 c0 0f 84 52 fe ff ff 48 8d bb c0 0c 00 00 be ff ff ff ff e8 da fc 9b 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 77 04 bc 02    	mov    0x2bc0477(%rip),%eax        # 0x2bc047f
   8:	85 c0                	test   %eax,%eax
   a:	0f 84 52 fe ff ff    	je     0xfffffffffffffe62
  10:	48 8d bb c0 0c 00 00 	lea    0xcc0(%rbx),%rdi
  17:	be ff ff ff ff       	mov    $0xffffffff,%esi
  1c:	e8 da fc 9b 00       	call   0x9bfcfb
  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
[   50.045916][   T67] RSP: 0018:ffffc90000487360 EFLAGS: 00010246
[   50.046345][   T67] RAX: 0000000000000000 RBX: ffff88800e8ea000 RCX: 0000000000000001
[   50.046827][   T67] RDX: 0000000000000000 RSI: ffffffff86310751 RDI: ffffffff85a58280
[   50.047330][   T67] RBP: ffffc90000487450 R08: 0000000000000000 R09: 0000000000000000
[   50.047816][   T67] R10: ffffc90000487480 R11: ffffffff826be86a R12: 1ffff92000090e70
[   50.048307][   T67] R13: 00000000000005dc R14: ffffc90000487480 R15: ffff88800e8eaf48
[   50.048792][   T67] FS:  0000000000000000(0000) GS:ffff8880e4699000(0000) knlGS:0000000000000000
[   50.049371][   T67] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[   50.049785][   T67] CR2: 00005568a9684dec CR3: 000000000508f005 CR4: 0000000000772ef0
[   50.050280][   T67] PKRU: 55555554
[   50.050544][   T67] Call Trace:
[   50.050799][   T67]  <TASK>
[ 50.050977][ T67] ? kasan_record_aux_stack (mm/kasan/generic.c:548) 
[ 50.051319][ T67] ? __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) 
[ 50.051720][ T67] ? br_del_if (net/bridge/br_if.c:742) 
[ 50.051990][ T67] ? br_device_event (net/bridge/br.c:141) 
[ 50.052339][ T67] ? __pfx_netif_set_mtu_ext (net/core/dev.c:9607) 
[ 50.052679][ T67] ? notifier_call_chain (kernel/notifier.c:85 (discriminator 2)) 
[ 50.053010][ T67] ? unregister_netdevice_many_notify (net/core/dev.c:12107) 
[ 50.053426][ T67] ? default_device_exit_batch (net/core/dev.c:12673) 
[ 50.053836][ T67] ? ops_undo_list (net/core/net_namespace.c:250) 
[ 50.054176][ T67] ? cleanup_net (net/core/net_namespace.c:684) 
[ 50.054508][ T67] ? process_one_work (kernel/workqueue.c:3238) 
[ 50.054834][ T67] ? worker_thread (kernel/workqueue.c:3315 kernel/workqueue.c:3402) 
[ 50.055172][ T67] ? kthread (kernel/kthread.c:464) 
[ 50.055425][ T67] ? ret_from_fork (arch/x86/kernel/process.c:148) 
[ 50.055762][ T67] ? ret_from_fork_asm (arch/x86/entry/entry_64.S:258) 
[ 50.056109][ T67] netif_set_mtu (net/core/dev.c:9652) 
[ 50.056434][ T67] ? __pfx_netif_set_mtu (net/core/dev.c:9647) 
[ 50.056774][ T67] dev_set_mtu (./include/net/netdev_lock.h:30 ./include/net/netdev_lock.h:47 net/core/dev_api.c:249) 
[ 50.057027][ T67] br_mtu_auto_adjust (net/bridge/br_if.c:525) 
[ 50.057373][ T67] br_del_if (net/bridge/br_if.c:743) 
[ 50.057632][ T67] br_device_event (net/bridge/br.c:141) 
[ 50.057959][ T67] ? __pfx_br_device_event (net/bridge/br.c:29) 
[ 50.058311][ T67] notifier_call_chain (kernel/notifier.c:85 (discriminator 2)) 
[ 50.058655][ T67] unregister_netdevice_many_notify (net/core/dev.c:12107) 
[ 50.059062][ T67] ? __pfx_vxlan_dellink (drivers/net/vxlan/vxlan_core.c:4473) vxlan 
[ 50.059494][ T67] ? __pfx_unregister_netdevice_many_notify (net/core/dev.c:12032) 
[ 50.059901][ T67] ? net_generic (./include/linux/rcupdate.h:341 ./include/linux/rcupdate.h:871 ./include/net/netns/generic.h:48) vxlan 
[ 50.060258][ T67] vxlan_netdevice_event (drivers/net/vxlan/vxlan_core.c:4709 drivers/net/vxlan/vxlan_core.c:4718) vxlan 
[ 50.060685][ T67] ? pktgen_find_dev (./arch/x86/include/asm/jump_label.h:36 net/core/pktgen.c:3788) pktgen 
[ 50.061013][ T67] ? __pfx_vxlan_netdevice_event (drivers/net/vxlan/vxlan_core.c:4713) vxlan 
[ 50.061439][ T67] ? pktgen_device_event (net/core/pktgen.c:2133) pktgen 
[ 50.061845][ T67] notifier_call_chain (kernel/notifier.c:85 (discriminator 2)) 
[ 50.062201][ T67] unregister_netdevice_many_notify (net/core/dev.c:12107) 
[ 50.062610][ T67] ? mutex_is_locked (./arch/x86/include/asm/atomic64_64.h:15 ./include/linux/atomic/atomic-arch-fallback.h:2583 ./include/linux/atomic/atomic-long.h:38 ./include/linux/atomic/atomic-instrumented.h:3189 kernel/locking/mutex.h:47 kernel/locking/mutex.c:67) 
[ 50.062941][ T67] ? __pfx_unregister_netdevice_many_notify (net/core/dev.c:12032) 
[ 50.063360][ T67] ? unregister_netdevice_queue (net/core/dev.c:12004) 
[ 50.063766][ T67] ? __pfx_unregister_netdevice_queue (net/core/dev.c:12003) 
[ 50.064175][ T67] ? vrf_dellink (drivers/net/vrf.c:1665) 
[ 50.064504][ T67] ? __pfx_unregister_netdevice_queue (net/core/dev.c:12003) 
[ 50.064914][ T67] default_device_exit_batch (net/core/dev.c:12673) 
[ 50.065252][ T67] ? __pfx_default_device_exit_batch (net/core/dev.c:12648) 
[ 50.065665][ T67] ops_undo_list (net/core/net_namespace.c:250) 
[ 50.065998][ T67] ? __pfx_ops_undo_list (net/core/net_namespace.c:222) 
[ 50.066334][ T67] ? cleanup_net (./include/linux/list.h:183 net/core/net_namespace.c:679) 
[ 50.066668][ T67] cleanup_net (net/core/net_namespace.c:684) 
[ 50.066994][ T67] ? __pfx_cleanup_net (net/core/net_namespace.c:648) 
[ 50.067337][ T67] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:745) 
[ 50.067667][ T67] process_one_work (kernel/workqueue.c:3238) 
[ 50.068008][ T67] ? __pfx_process_one_work (kernel/workqueue.c:3140) 
[ 50.068350][ T67] ? assign_work (kernel/workqueue.c:1200) 
[ 50.068679][ T67] worker_thread (kernel/workqueue.c:3315 kernel/workqueue.c:3402) 
[ 50.069016][ T67] ? __pfx_worker_thread (kernel/workqueue.c:3348) 
[ 50.069355][ T67] kthread (kernel/kthread.c:464) 
[ 50.069608][ T67] ? __pfx_kthread (kernel/kthread.c:413) 
[ 50.069928][ T67] ? ret_from_fork (arch/x86/kernel/process.c:147) 
[ 50.070264][ T67] ? __lock_release (kernel/locking/lockdep.c:5539) 
[ 50.070620][ T67] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:745) 
[ 50.070945][ T67] ? __pfx_kthread (kernel/kthread.c:413) 
[ 50.071289][ T67] ret_from_fork (arch/x86/kernel/process.c:148) 
[ 50.071610][ T67] ? __pfx_kthread (kernel/kthread.c:413) 


Finger prints:
netif_set_mtu_ext:netif_set_mtu:dev_set_mtu:br_mtu_auto_adjust:br_del_if
netif_set_mtu_ext:netif_set_mtu:dev_set_mtu:br_mtu_auto_adjust:br_add_if