======================================
| [   20.183031][  T305] veth1: entered promiscuous mode
| [   20.185535][  T305] ------------[ cut here ]------------
| [ 20.185878][ T305] WARNING: CPU: 0 PID: 305 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) 
| [   20.186538][  T305] Modules linked in: bridge stp llc 8021q vrf veth
[   20.187663][  T305] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[ 20.188068][ T305] 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) 
[ 20.188411][ T305] 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
[   20.189619][  T305] RSP: 0018:ffffc90000676ef0 EFLAGS: 00010246
[   20.190033][  T305] RAX: 0000000000000000 RBX: ffff888013d22000 RCX: 0000000000000001
[   20.191059][  T305] RDX: 0000000000000000 RSI: ffffffff9529b941 RDI: ffffffff94a555e0
[   20.191574][  T305] RBP: ffffc90000676fe0 R08: 0000000000000000 R09: 0000000000000000
[   20.192095][  T305] R10: ffffc90000677010 R11: ffffffff960a8918 R12: 1ffff920000cede2
[   20.192636][  T305] R13: 00000000000005dc R14: ffffc90000677010 R15: ffff888013d22f08
[   20.193127][  T305] FS:  00007f0921209800(0000) GS:ffff88809eeb7000(0000) knlGS:0000000000000000
[   20.193706][  T305] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[   20.194110][  T305] CR2: 00000000004e5aa8 CR3: 0000000005019005 CR4: 0000000000772ef0
[   20.194619][  T305] PKRU: 55555554
[   20.194869][  T305] Call Trace:
[   20.195116][  T305]  <TASK>
[ 20.195289][ T305] ? __pfx_netif_set_mtu_ext (net/core/dev.c:9607) 
[ 20.195626][ T305] ? find_held_lock (kernel/locking/lockdep.c:5353) 
[ 20.195952][ T305] ? mark_held_locks (kernel/locking/lockdep.c:4328) 
[ 20.196265][ T305] ? _raw_spin_unlock_irqrestore (./include/linux/spinlock_api_smp.h:151 kernel/locking/spinlock.c:194) 
[ 20.196671][ T305] ? lockdep_hardirqs_on (kernel/locking/lockdep.c:4475) 
[ 20.196990][ T305] netif_set_mtu (net/core/dev.c:9652) 
[ 20.197302][ T305] ? __pfx_netif_set_mtu (net/core/dev.c:9647) 
[ 20.197643][ T305] ? br_get_link_af_size_filtered (net/bridge/br_netlink.c:116) bridge 
[ 20.198069][ T305] dev_set_mtu (./include/net/netdev_lock.h:30 ./include/net/netdev_lock.h:47 net/core/dev_api.c:249) 
[ 20.198306][ T305] br_mtu_auto_adjust (net/bridge/br_if.c:525) bridge 
[ 20.198747][ T305] br_add_if (net/bridge/br_if.c:697) bridge 
[ 20.199102][ T305] do_set_master (net/core/rtnetlink.c:2948) 
[ 20.199415][ T305] do_setlink.constprop.0 (net/core/rtnetlink.c:3150) 
[ 20.199737][ T305] ? __pfx_do_setlink.constprop.0 (net/core/rtnetlink.c:3021) 
[ 20.200134][ T305] ? rcu_read_lock_any_held (kernel/rcu/update.c:386 kernel/rcu/update.c:380) 
[ 20.200450][ T305] ? validate_chain (kernel/locking/lockdep.c:3804 kernel/locking/lockdep.c:3824 kernel/locking/lockdep.c:3879) 
[ 20.200782][ T305] ? __kernel_text_address (kernel/extable.c:79) 
[ 20.201094][ T305] ? __lock_acquire (kernel/locking/lockdep.c:5240) 
[ 20.201420][ T305] ? __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) 
[ 20.201750][ T305] ? __pfx___mutex_trylock_common (kernel/locking/mutex.c:88) 
[ 20.202133][ T305] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:745) 
[ 20.202475][ T305] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:745) 
[ 20.202792][ T305] ? trace_contention_end (./include/trace/events/lock.h:122 (discriminator 21)) 
[ 20.203114][ T305] ? __mutex_lock (./arch/x86/include/asm/preempt.h:104 kernel/locking/mutex.c:728 kernel/locking/mutex.c:747) 
[ 20.203426][ T305] ? find_held_lock (kernel/locking/lockdep.c:5353) 
[ 20.203763][ T305] ? rtnl_newlink (net/core/rtnetlink.c:343 net/core/rtnetlink.c:4056) 
[ 20.204072][ T305] ? __create_object (mm/kmemleak.c:771) 
[ 20.204394][ T305] ? __pfx___mutex_lock (kernel/locking/mutex.c:746) 
[ 20.204712][ T305] ? trace_cap_capable (./include/trace/events/capability.h:26 (discriminator 21)) 
[ 20.205022][ T305] ? _raw_spin_unlock_irqrestore (./arch/x86/include/asm/preempt.h:104 ./include/linux/spinlock_api_smp.h:152 kernel/locking/spinlock.c:194) 
[ 20.205404][ T305] ? __rtnl_newlink (net/core/rtnetlink.c:3907) 
[ 20.205742][ T305] rtnl_newlink (net/core/rtnetlink.c:351 net/core/rtnetlink.c:4058) 
[ 20.206062][ T305] ? __pfx_rtnl_newlink (net/core/rtnetlink.c:3948) 
[ 20.206366][ T305] ? __lock_acquire (kernel/locking/lockdep.c:5240) 
[ 20.206705][ T305] ? find_held_lock (kernel/locking/lockdep.c:5353) 
[ 20.207014][ T305] ? rtnetlink_rcv_msg (./include/linux/rcupdate.h:341 ./include/linux/rcupdate.h:871 net/core/rtnetlink.c:6944) 
[ 20.207327][ T305] ? __lock_release (kernel/locking/lockdep.c:5539) 
[ 20.207648][ T305] ? __pfx_rtnl_newlink (net/core/rtnetlink.c:3948) 
[ 20.207979][ T305] rtnetlink_rcv_msg (net/core/rtnetlink.c:6946) 
[ 20.208293][ T305] ? __pfx_rtnetlink_rcv_msg (net/core/rtnetlink.c:6849) 
[ 20.208627][ T305] ? __lock_acquire (kernel/locking/lockdep.c:5240) 
[ 20.208955][ T305] netlink_rcv_skb (net/netlink/af_netlink.c:2551) 
[ 20.209277][ T305] ? __pfx_rtnetlink_rcv_msg (net/core/rtnetlink.c:6849) 
[ 20.209593][ T305] ? __pfx_netlink_rcv_skb (net/netlink/af_netlink.c:2528) 
[ 20.209937][ T305] ? netlink_deliver_tap (./include/linux/rcupdate.h:341 ./include/linux/rcupdate.h:871 net/netlink/af_netlink.c:340) 
[ 20.210243][ T305] ? 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) 
[ 20.210565][ T305] netlink_unicast (net/netlink/af_netlink.c:1320 net/netlink/af_netlink.c:1346) 
[ 20.210884][ T305] ? __pfx_netlink_unicast (net/netlink/af_netlink.c:1331) 
[ 20.211192][ T305] ? __lock_acquire (kernel/locking/lockdep.c:5240) 
[ 20.211503][ T305] netlink_sendmsg (net/netlink/af_netlink.c:1896) 
[ 20.211826][ T305] ? __pfx_netlink_sendmsg (net/netlink/af_netlink.c:1815) 
[ 20.212139][ T305] ? __import_iovec (lib/iov_iter.c:1441 lib/iov_iter.c:1456) 
[ 20.212468][ T305] ____sys_sendmsg (net/socket.c:714 net/socket.c:729 net/socket.c:2614) 
[ 20.212793][ T305] ? __pfx_____sys_sendmsg (net/socket.c:2560) 
[ 20.213107][ T305] ? __pfx_copy_msghdr_from_user (net/socket.c:2540) 
[ 20.213500][ T305] ___sys_sendmsg (net/socket.c:2670) 
[ 20.213810][ T305] ? kasan_record_aux_stack (mm/kasan/generic.c:548) 
[ 20.214123][ T305] ? __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) 
[ 20.214509][ T305] ? __pfx____sys_sendmsg (net/socket.c:2657) 
[ 20.214826][ T305] ? find_held_lock (kernel/locking/lockdep.c:5353) 
[ 20.215138][ T305] ? __lock_acquire (kernel/locking/lockdep.c:5240) 
[ 20.215451][ T305] ? find_held_lock (kernel/locking/lockdep.c:5353) 
[ 20.215767][ T305] ? __virt_addr_valid (./include/linux/rcupdate.h:341 ./include/linux/rcupdate.h:953 ./include/linux/mmzone.h:2168 arch/x86/mm/physaddr.c:65) 
[ 20.216078][ T305] ? __lock_release (kernel/locking/lockdep.c:5539) 
[ 20.216388][ T305] __sys_sendmsg (net/socket.c:2700) 
[ 20.216698][ T305] ? __call_rcu_common.constprop.0 (kernel/rcu/tree.c:3119) 
[ 20.217076][ T305] ? __pfx___sys_sendmsg (net/socket.c:2685) 
[ 20.217393][ T305] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:745) 
[ 20.217707][ T305] do_syscall_64 (arch/x86/entry/syscall_64.c:63 arch/x86/entry/syscall_64.c:94) 
[ 20.218024][ T305] entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:130) 
[   20.218408][  T305] RIP: 0033:0x7f09213d61e7
[ 20.218743][ T305] 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)
[   20.220143][  T305] RSP: 002b:00007ffcd9289a18 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
[   20.220634][  T305] RAX: ffffffffffffffda RBX: 00007ffcd928a140 RCX: 00007f09213d61e7
[   20.221323][  T305] RDX: 0000000000000000 RSI: 00007ffcd9289a80 RDI: 0000000000000005
[   20.222021][  T305] RBP: 0000000000000004 R08: 0000000000000003 R09: 0000000000000000
[   20.222496][  T305] R10: 0000000000d6d910 R11: 0000000000000246 R12: 0000000000000004
[   20.222977][  T305] R13: 00000000686e1203 R14: 0000000000499600 R15: 0000000000000000
| [   20.358267][  T307] ------------[ cut here ]------------
| [ 20.358619][ T307] WARNING: CPU: 3 PID: 307 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) 
| [   20.359240][  T307] Modules linked in: bridge stp llc 8021q vrf veth
| [   20.360312][  T307] Tainted: [W]=WARN
[   20.360575][  T307] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[ 20.361105][ T307] 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) 
[ 20.361424][ T307] 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
[   20.362558][  T307] RSP: 0018:ffffc90000596ef0 EFLAGS: 00010246
[   20.362966][  T307] RAX: 0000000000000000 RBX: ffff888013d22000 RCX: 0000000000000001
[   20.363425][  T307] RDX: 0000000000000000 RSI: ffffffff9529b941 RDI: ffffffff94a555e0
[   20.363900][  T307] RBP: ffffc90000596fe0 R08: 0000000000000000 R09: 0000000000000000
[   20.364382][  T307] R10: ffffc90000597010 R11: ffffffff960a8918 R12: 1ffff920000b2de2
[   20.364853][  T307] R13: 00000000000005dc R14: ffffc90000597010 R15: ffff888013d22f08
[   20.365311][  T307] FS:  00007f90c0eeb800(0000) GS:ffff88809f037000(0000) knlGS:0000000000000000
[   20.365889][  T307] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[   20.366296][  T307] CR2: 00000000004e5ab0 CR3: 0000000013cf1002 CR4: 0000000000772ef0
[   20.366766][  T307] PKRU: 55555554
[   20.366997][  T307] Call Trace:
[   20.367228][  T307]  <TASK>
[ 20.367388][ T307] ? __pfx_netif_set_mtu_ext (net/core/dev.c:9607) 
[ 20.367705][ T307] ? find_held_lock (kernel/locking/lockdep.c:5353) 
[ 20.368028][ T307] ? mark_held_locks (kernel/locking/lockdep.c:4328) 
[ 20.368352][ T307] ? _raw_spin_unlock_irqrestore (./include/linux/spinlock_api_smp.h:151 kernel/locking/spinlock.c:194) 
[ 20.368769][ T307] ? lockdep_hardirqs_on (kernel/locking/lockdep.c:4475) 
[ 20.369080][ T307] netif_set_mtu (net/core/dev.c:9652) 
[ 20.369402][ T307] ? __pfx_netif_set_mtu (net/core/dev.c:9647) 
[ 20.369733][ T307] ? br_get_link_af_size_filtered (net/bridge/br_netlink.c:116) bridge 
[ 20.370171][ T307] dev_set_mtu (./include/net/netdev_lock.h:30 ./include/net/netdev_lock.h:47 net/core/dev_api.c:249) 
[ 20.370416][ T307] br_mtu_auto_adjust (net/bridge/br_if.c:525) bridge 
[ 20.370849][ T307] br_add_if (net/bridge/br_if.c:697) bridge 
[ 20.371212][ T307] do_set_master (net/core/rtnetlink.c:2948) 
[ 20.371537][ T307] do_setlink.constprop.0 (net/core/rtnetlink.c:3150) 
[ 20.371849][ T307] ? __pfx_do_setlink.constprop.0 (net/core/rtnetlink.c:3021) 
[ 20.372260][ T307] ? rcu_read_lock_any_held (kernel/rcu/update.c:386 kernel/rcu/update.c:380) 
[ 20.372580][ T307] ? validate_chain (kernel/locking/lockdep.c:3804 kernel/locking/lockdep.c:3824 kernel/locking/lockdep.c:3879) 
[ 20.372887][ T307] ? __kernel_text_address (kernel/extable.c:79) 
[ 20.373212][ T307] ? __lock_acquire (kernel/locking/lockdep.c:5240) 
[ 20.373540][ T307] ? __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) 
[ 20.373854][ T307] ? __pfx___mutex_trylock_common (kernel/locking/mutex.c:88) 
[ 20.374236][ T307] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:745) 
[ 20.374554][ T307] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:745) 
[ 20.374872][ T307] ? trace_contention_end (./include/trace/events/lock.h:122 (discriminator 21)) 
[ 20.375179][ T307] ? __mutex_lock (./arch/x86/include/asm/preempt.h:104 kernel/locking/mutex.c:728 kernel/locking/mutex.c:747) 
[ 20.375504][ T307] ? find_held_lock (kernel/locking/lockdep.c:5353) 
[ 20.375830][ T307] ? rtnl_newlink (net/core/rtnetlink.c:343 net/core/rtnetlink.c:4056) 
[ 20.376152][ T307] ? __create_object (mm/kmemleak.c:771) 
[ 20.376461][ T307] ? __pfx___mutex_lock (kernel/locking/mutex.c:746) 
[ 20.376775][ T307] ? trace_cap_capable (./include/trace/events/capability.h:26 (discriminator 21)) 
[ 20.377092][ T307] ? _raw_spin_unlock_irqrestore (./arch/x86/include/asm/preempt.h:104 ./include/linux/spinlock_api_smp.h:152 kernel/locking/spinlock.c:194) 
[ 20.377484][ T307] ? __rtnl_newlink (net/core/rtnetlink.c:3907) 
[ 20.377807][ T307] rtnl_newlink (net/core/rtnetlink.c:351 net/core/rtnetlink.c:4058) 
[ 20.378145][ T307] ? __pfx_rtnl_newlink (net/core/rtnetlink.c:3948) 
[ 20.378467][ T307] ? __lock_acquire (kernel/locking/lockdep.c:5240) 
[ 20.378805][ T307] ? find_held_lock (kernel/locking/lockdep.c:5353) 
[ 20.379127][ T307] ? rtnetlink_rcv_msg (./include/linux/rcupdate.h:341 ./include/linux/rcupdate.h:871 net/core/rtnetlink.c:6944) 
[ 20.379435][ T307] ? __lock_release (kernel/locking/lockdep.c:5539) 
[ 20.379760][ T307] ? __pfx_rtnl_newlink (net/core/rtnetlink.c:3948) 
[ 20.380067][ T307] rtnetlink_rcv_msg (net/core/rtnetlink.c:6946) 
[ 20.380373][ T307] ? __pfx_rtnetlink_rcv_msg (net/core/rtnetlink.c:6849) 
[ 20.380701][ T307] ? __lock_acquire (kernel/locking/lockdep.c:5240) 
[ 20.381023][ T307] netlink_rcv_skb (net/netlink/af_netlink.c:2551) 
[ 20.381345][ T307] ? __pfx_rtnetlink_rcv_msg (net/core/rtnetlink.c:6849) 
[ 20.381676][ T307] ? __pfx_netlink_rcv_skb (net/netlink/af_netlink.c:2528) 
[ 20.382010][ T307] ? netlink_deliver_tap (./include/linux/rcupdate.h:341 ./include/linux/rcupdate.h:871 net/netlink/af_netlink.c:340) 
[ 20.382339][ T307] ? 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) 
[ 20.382670][ T307] netlink_unicast (net/netlink/af_netlink.c:1320 net/netlink/af_netlink.c:1346) 
[ 20.383009][ T307] ? __pfx_netlink_unicast (net/netlink/af_netlink.c:1331) 
[ 20.383327][ T307] ? __lock_acquire (kernel/locking/lockdep.c:5240) 
[ 20.383663][ T307] netlink_sendmsg (net/netlink/af_netlink.c:1896) 
[ 20.384001][ T307] ? __pfx_netlink_sendmsg (net/netlink/af_netlink.c:1815) 
[ 20.384331][ T307] ? __import_iovec (lib/iov_iter.c:1441 lib/iov_iter.c:1456) 
[ 20.384673][ T307] ____sys_sendmsg (net/socket.c:714 net/socket.c:729 net/socket.c:2614) 
[ 20.384995][ T307] ? __pfx_____sys_sendmsg (net/socket.c:2560) 
[ 20.385319][ T307] ? __pfx_copy_msghdr_from_user (net/socket.c:2540) 
[ 20.385735][ T307] ___sys_sendmsg (net/socket.c:2670) 
[ 20.386108][ T307] ? kasan_record_aux_stack (mm/kasan/generic.c:548) 
[ 20.386432][ T307] ? __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) 
[ 20.386818][ T307] ? __pfx____sys_sendmsg (net/socket.c:2657) 
[ 20.387143][ T307] ? find_held_lock (kernel/locking/lockdep.c:5353) 
[ 20.387454][ T307] ? __lock_acquire (kernel/locking/lockdep.c:5240) 
[ 20.387806][ T307] ? find_held_lock (kernel/locking/lockdep.c:5353) 
[ 20.388145][ T307] ? __virt_addr_valid (./include/linux/rcupdate.h:341 ./include/linux/rcupdate.h:953 ./include/linux/mmzone.h:2168 arch/x86/mm/physaddr.c:65) 
[ 20.388467][ T307] ? __lock_release (kernel/locking/lockdep.c:5539) 
[ 20.388804][ T307] __sys_sendmsg (net/socket.c:2700) 
[ 20.389128][ T307] ? __call_rcu_common.constprop.0 (kernel/rcu/tree.c:3119) 
[ 20.389534][ T307] ? __pfx___sys_sendmsg (net/socket.c:2685) 
[ 20.389868][ T307] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:745) 
[ 20.390199][ T307] do_syscall_64 (arch/x86/entry/syscall_64.c:63 arch/x86/entry/syscall_64.c:94) 
[ 20.390533][ T307] entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:130) 
[   20.390933][  T307] RIP: 0033:0x7f90c10b81e7
[ 20.391267][ T307] 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)
[   20.392400][  T307] RSP: 002b:00007ffd1508ec08 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
[   20.392901][  T307] RAX: ffffffffffffffda RBX: 00007ffd1508f330 RCX: 00007f90c10b81e7
[   20.393378][  T307] RDX: 0000000000000000 RSI: 00007ffd1508ec70 RDI: 0000000000000005
[   20.393867][  T307] RBP: 0000000000000004 R08: 0000000000000003 R09: 0000000000000000
[   20.394360][  T307] R10: 0000000037dbb910 R11: 0000000000000246 R12: 0000000000000004
[   20.394862][  T307] R13: 00000000686e1204 R14: 0000000000499600 R15: 0000000000000000
| [   85.709459][  T594] ------------[ cut here ]------------
| [ 85.710474][ T594] WARNING: CPU: 1 PID: 594 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) 
| [   85.711173][  T594] Modules linked in: act_gact cls_flower sch_ingress bridge stp llc 8021q vrf veth
| [   85.712408][  T594] Tainted: [W]=WARN
[   85.712652][  T594] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[ 85.713056][ T594] 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) 
[ 85.713380][ T594] 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
[   85.714498][  T594] RSP: 0018:ffffc90001026ef0 EFLAGS: 00010246
[   85.714895][  T594] RAX: 0000000000000000 RBX: ffff8880025e2000 RCX: 0000000000000001
[   85.715375][  T594] RDX: 0000000000000000 RSI: ffffffff9529b941 RDI: ffffffff94a555e0
[   85.715848][  T594] RBP: ffffc90001026fe0 R08: 0000000000000000 R09: 0000000000000000
[   85.716325][  T594] R10: ffffc90001027010 R11: ffffffff960a8918 R12: 1ffff92000204de2
[   85.716797][  T594] R13: 00000000000005dc R14: ffffc90001027010 R15: ffff8880025e2f08
[   85.717286][  T594] FS:  00007f624874c800(0000) GS:ffff88809ef37000(0000) knlGS:0000000000000000
[   85.717842][  T594] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[   85.718243][  T594] CR2: 00007f6248a12770 CR3: 000000001666c002 CR4: 0000000000772ef0
[   85.718715][  T594] PKRU: 55555554
[   85.718950][  T594] Call Trace:
[   85.719199][  T594]  <TASK>
[ 85.719360][ T594] ? __pfx_netif_set_mtu_ext (net/core/dev.c:9607) 
[ 85.719692][ T594] ? find_held_lock (kernel/locking/lockdep.c:5353) 
[ 85.720019][ T594] ? mark_held_locks (kernel/locking/lockdep.c:4328) 
[ 85.720339][ T594] ? _raw_spin_unlock_irqrestore (./include/linux/spinlock_api_smp.h:151 kernel/locking/spinlock.c:194) 
[ 85.720732][ T594] ? lockdep_hardirqs_on (kernel/locking/lockdep.c:4475) 
[ 85.721041][ T594] netif_set_mtu (net/core/dev.c:9652) 
[ 85.721364][ T594] ? __pfx_netif_set_mtu (net/core/dev.c:9647) 
[ 85.721697][ T594] ? br_get_link_af_size_filtered (net/bridge/br_netlink.c:116) bridge 
[ 85.722137][ T594] dev_set_mtu (./include/net/netdev_lock.h:30 ./include/net/netdev_lock.h:47 net/core/dev_api.c:249) 
[ 85.722400][ T594] br_mtu_auto_adjust (net/bridge/br_if.c:525) bridge 
[ 85.722831][ T594] br_add_if (net/bridge/br_if.c:697) bridge 
[ 85.723175][ T594] ? cycle_netdev (drivers/net/vrf.c:1055) vrf 
[ 85.723502][ T594] do_set_master (net/core/rtnetlink.c:2948) 
[ 85.723828][ T594] do_setlink.constprop.0 (net/core/rtnetlink.c:3150) 
[ 85.724151][ T594] ? __pfx_do_setlink.constprop.0 (net/core/rtnetlink.c:3021) 
[ 85.724563][ T594] ? rcu_read_lock_any_held (kernel/rcu/update.c:386 kernel/rcu/update.c:380) 
[ 85.724876][ T594] ? validate_chain (kernel/locking/lockdep.c:3804 kernel/locking/lockdep.c:3824 kernel/locking/lockdep.c:3879) 
[ 85.725185][ T594] ? __kernel_text_address (kernel/extable.c:79) 
[ 85.725510][ T594] ? __lock_acquire (kernel/locking/lockdep.c:5240) 
[ 85.725841][ T594] ? __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) 
[ 85.726152][ T594] ? __pfx___mutex_trylock_common (kernel/locking/mutex.c:88) 
[ 85.726567][ T594] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:745) 
[ 85.726879][ T594] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:745) 
[ 85.727185][ T594] ? trace_contention_end (./include/trace/events/lock.h:122 (discriminator 21)) 
[ 85.727505][ T594] ? __mutex_lock (./arch/x86/include/asm/preempt.h:104 kernel/locking/mutex.c:728 kernel/locking/mutex.c:747) 
[ 85.727826][ T594] ? find_held_lock (kernel/locking/lockdep.c:5353) 
[ 85.728133][ T594] ? rtnl_newlink (net/core/rtnetlink.c:343 net/core/rtnetlink.c:4056) 
[ 85.728451][ T594] ? __create_object (mm/kmemleak.c:771) 
[ 85.728776][ T594] ? __pfx___mutex_lock (kernel/locking/mutex.c:746) 
[ 85.729090][ T594] ? trace_cap_capable (./include/trace/events/capability.h:26 (discriminator 21)) 
[ 85.729402][ T594] ? _raw_spin_unlock_irqrestore (./arch/x86/include/asm/preempt.h:104 ./include/linux/spinlock_api_smp.h:152 kernel/locking/spinlock.c:194) 
[ 85.729808][ T594] ? __rtnl_newlink (net/core/rtnetlink.c:3907) 
[ 85.730120][ T594] rtnl_newlink (net/core/rtnetlink.c:351 net/core/rtnetlink.c:4058) 
[ 85.730440][ T594] ? __pfx_rtnl_newlink (net/core/rtnetlink.c:3948) 
[ 85.730768][ T594] ? __lock_acquire (kernel/locking/lockdep.c:5240) 
[ 85.731083][ T594] ? find_held_lock (kernel/locking/lockdep.c:5353) 
[ 85.731389][ T594] ? rtnetlink_rcv_msg (./include/linux/rcupdate.h:341 ./include/linux/rcupdate.h:871 net/core/rtnetlink.c:6944) 
[ 85.731729][ T594] ? __lock_release (kernel/locking/lockdep.c:5539) 
[ 85.732039][ T594] ? __pfx_rtnl_newlink (net/core/rtnetlink.c:3948) 
[ 85.732357][ T594] rtnetlink_rcv_msg (net/core/rtnetlink.c:6946) 
[ 85.732694][ T594] ? __pfx_rtnetlink_rcv_msg (net/core/rtnetlink.c:6849) 
[ 85.733006][ T594] ? __lock_acquire (kernel/locking/lockdep.c:5240) 
[ 85.733314][ T594] netlink_rcv_skb (net/netlink/af_netlink.c:2551) 
[ 85.733648][ T594] ? __pfx_rtnetlink_rcv_msg (net/core/rtnetlink.c:6849) 
[ 85.733969][ T594] ? __pfx_netlink_rcv_skb (net/netlink/af_netlink.c:2528) 
[ 85.734283][ T594] ? netlink_deliver_tap (./include/linux/rcupdate.h:341 ./include/linux/rcupdate.h:871 net/netlink/af_netlink.c:340) 
[ 85.734611][ T594] ? 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) 
[ 85.734920][ T594] netlink_unicast (net/netlink/af_netlink.c:1320 net/netlink/af_netlink.c:1346) 
[ 85.735227][ T594] ? __pfx_netlink_unicast (net/netlink/af_netlink.c:1331) 
[ 85.735543][ T594] ? __lock_acquire (kernel/locking/lockdep.c:5240) 
[ 85.735873][ T594] netlink_sendmsg (net/netlink/af_netlink.c:1896) 
[ 85.736193][ T594] ? __pfx_netlink_sendmsg (net/netlink/af_netlink.c:1815) 
[ 85.736502][ T594] ? __import_iovec (lib/iov_iter.c:1441 lib/iov_iter.c:1456) 
[ 85.736845][ T594] ____sys_sendmsg (net/socket.c:714 net/socket.c:729 net/socket.c:2614) 
[ 85.737169][ T594] ? __pfx_____sys_sendmsg (net/socket.c:2560) 
[ 85.737475][ T594] ? __pfx_copy_msghdr_from_user (net/socket.c:2540) 
[ 85.737896][ T594] ___sys_sendmsg (net/socket.c:2670) 
[ 85.738204][ T594] ? kasan_record_aux_stack (mm/kasan/generic.c:548) 
[ 85.738531][ T594] ? __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) 
[ 85.738927][ T594] ? __pfx____sys_sendmsg (net/socket.c:2657) 
[ 85.739239][ T594] ? find_held_lock (kernel/locking/lockdep.c:5353) 
[ 85.739556][ T594] ? __lock_acquire (kernel/locking/lockdep.c:5240) 
[ 85.739884][ T594] ? find_held_lock (kernel/locking/lockdep.c:5353) 
[ 85.740187][ T594] ? __virt_addr_valid (./include/linux/rcupdate.h:341 ./include/linux/rcupdate.h:953 ./include/linux/mmzone.h:2168 arch/x86/mm/physaddr.c:65) 
[ 85.740494][ T594] ? __lock_release (kernel/locking/lockdep.c:5539) 
[ 85.740844][ T594] __sys_sendmsg (net/socket.c:2700) 
[ 85.741150][ T594] ? __call_rcu_common.constprop.0 (kernel/rcu/tree.c:3119) 
[ 85.741546][ T594] ? __pfx___sys_sendmsg (net/socket.c:2685) 
[ 85.741880][ T594] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:745) 
[ 85.742188][ T594] do_syscall_64 (arch/x86/entry/syscall_64.c:63 arch/x86/entry/syscall_64.c:94) 
[ 85.742510][ T594] entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:130) 
[   85.742920][  T594] RIP: 0033:0x7f62489191e7
[ 85.743236][ T594] 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)
[   85.744365][  T594] RSP: 002b:00007ffccf8d08b8 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
[   85.744861][  T594] RAX: ffffffffffffffda RBX: 00007ffccf8d0fe0 RCX: 00007f62489191e7
[   85.745335][  T594] RDX: 0000000000000000 RSI: 00007ffccf8d0920 RDI: 0000000000000005
[   85.745807][  T594] RBP: 0000000000000004 R08: 0000000000000003 R09: 0000000000000000
[   85.746283][  T594] R10: 00000000393c6910 R11: 0000000000000246 R12: 0000000000000004


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