======================================
| 0
| xx__-> [  127.007636][ T1290] ------------[ cut here ]------------
| [ 127.008035][ T1290] WARNING: CPU: 2 PID: 1290 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) 
| [  127.008666][ T1290] Modules linked in:
[  127.011122][ T1290] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[ 127.011524][ T1290] 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) 
[ 127.011835][ T1290] 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
[  127.012892][ T1290] RSP: 0018:ffffc90002f27140 EFLAGS: 00010246
[  127.013272][ T1290] RAX: 0000000000000000 RBX: ffff888009b69000 RCX: 0000000000000001
[  127.013716][ T1290] RDX: 0000000000000000 RSI: ffffffffad910751 RDI: ffffffffad058280
[  127.014163][ T1290] RBP: ffffc90002f27228 R08: ffff88800c51e800 R09: 0000000000000000
[  127.014614][ T1290] R10: ffffc90002f275c8 R11: ffffffffaec73028 R12: 1ffff920005e4e2c
[  127.015048][ T1290] R13: 00000000000005a2 R14: ffffc90002f27880 R15: ffff88800a7e1c60
[  127.015500][ T1290] FS:  00007f841b7d5800(0000) GS:ffff8880bd099000(0000) knlGS:0000000000000000
[  127.016014][ T1290] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  127.016397][ T1290] CR2: 00000000004e5558 CR3: 000000001187c006 CR4: 0000000000772ef0
[  127.016840][ T1290] PKRU: 55555554
[  127.017065][ T1290] Call Trace:
[  127.017293][ T1290]  <TASK>
[ 127.017487][ T1290] ? find_held_lock (kernel/locking/lockdep.c:5353) 
[ 127.017810][ T1290] ? __pfx_netif_set_mtu_ext (net/core/dev.c:9607) 
[ 127.018105][ T1290] ? __lock_release (kernel/locking/lockdep.c:5539) 
[ 127.018410][ T1290] ? __pfx_validate_linkmsg (net/core/rtnetlink.c:2660) 
[ 127.018709][ T1290] ? is_bpf_text_address (kernel/bpf/core.c:777) 
[ 127.019010][ T1290] ? kernel_text_address (kernel/extable.c:97 kernel/extable.c:94) 
[ 127.019316][ T1290] do_setlink.constprop.0 (net/core/rtnetlink.c:3106) 
[ 127.019639][ T1290] ? __pfx_do_setlink.constprop.0 (net/core/rtnetlink.c:3021) 
[ 127.020389][ T1290] ? rcu_read_lock_any_held (kernel/rcu/update.c:386 kernel/rcu/update.c:380) 
[ 127.020702][ T1290] ? validate_chain (kernel/locking/lockdep.c:3804 kernel/locking/lockdep.c:3824 kernel/locking/lockdep.c:3879) 
[ 127.020994][ T1290] ? __kernel_text_address (kernel/extable.c:79) 
[ 127.021291][ T1290] ? __lock_acquire (kernel/locking/lockdep.c:5240) 
[ 127.021604][ T1290] ? __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) 
[ 127.021899][ T1290] ? __pfx___mutex_trylock_common (kernel/locking/mutex.c:88) 
[ 127.022256][ T1290] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:745) 
[ 127.022573][ T1290] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:745) 
[ 127.022863][ T1290] ? trace_contention_end (./include/trace/events/lock.h:122 (discriminator 21)) 
[ 127.023160][ T1290] ? __mutex_lock (./arch/x86/include/asm/preempt.h:104 kernel/locking/mutex.c:728 kernel/locking/mutex.c:747) 
[ 127.023481][ T1290] ? find_held_lock (kernel/locking/lockdep.c:5353) 
[ 127.023804][ T1290] ? rtnl_newlink (net/core/rtnetlink.c:343 net/core/rtnetlink.c:4056) 
[ 127.024129][ T1290] ? __create_object (mm/kmemleak.c:771) 
[ 127.024455][ T1290] ? __pfx___mutex_lock (kernel/locking/mutex.c:746) 
[ 127.024754][ T1290] ? trace_cap_capable (./include/trace/events/capability.h:26 (discriminator 21)) 
[ 127.025064][ T1290] ? _raw_spin_unlock_irqrestore (./arch/x86/include/asm/preempt.h:104 ./include/linux/spinlock_api_smp.h:152 kernel/locking/spinlock.c:194) 
[ 127.025467][ T1290] ? __rtnl_newlink (net/core/rtnetlink.c:3907) 
[ 127.025772][ T1290] rtnl_newlink (net/core/rtnetlink.c:351 net/core/rtnetlink.c:4058) 
[ 127.026070][ T1290] ? __pfx_rtnl_newlink (net/core/rtnetlink.c:3948) 
[ 127.026376][ T1290] ? __lock_acquire (kernel/locking/lockdep.c:5240) 
[ 127.026676][ T1290] ? find_held_lock (kernel/locking/lockdep.c:5353) 
[ 127.026969][ T1290] ? rtnetlink_rcv_msg (./include/linux/rcupdate.h:341 ./include/linux/rcupdate.h:871 net/core/rtnetlink.c:6944) 
[ 127.027265][ T1290] ? __lock_release (kernel/locking/lockdep.c:5539) 
[ 127.027574][ T1290] ? __pfx_rtnl_newlink (net/core/rtnetlink.c:3948) 
[ 127.027876][ T1290] rtnetlink_rcv_msg (net/core/rtnetlink.c:6946) 
[ 127.028175][ T1290] ? __pfx_rtnetlink_rcv_msg (net/core/rtnetlink.c:6849) 
[ 127.028492][ T1290] ? __lock_acquire (kernel/locking/lockdep.c:5240) 
[ 127.028805][ T1290] netlink_rcv_skb (net/netlink/af_netlink.c:2551) 
[ 127.029108][ T1290] ? __pfx_rtnetlink_rcv_msg (net/core/rtnetlink.c:6849) 
[ 127.029422][ T1290] ? __pfx_netlink_rcv_skb (net/netlink/af_netlink.c:2528) 
[ 127.029729][ T1290] ? netlink_deliver_tap (./include/linux/rcupdate.h:341 ./include/linux/rcupdate.h:871 net/netlink/af_netlink.c:340) 
[ 127.030020][ T1290] ? 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) 
[ 127.030325][ T1290] netlink_unicast (net/netlink/af_netlink.c:1321 net/netlink/af_netlink.c:1346) 
[ 127.030636][ T1290] ? __pfx_netlink_unicast (net/netlink/af_netlink.c:1331) 
[ 127.030926][ T1290] ? __lock_acquire (kernel/locking/lockdep.c:5240) 
[ 127.031224][ T1290] netlink_sendmsg (net/netlink/af_netlink.c:1896) 
[ 127.031535][ T1290] ? __pfx_netlink_sendmsg (net/netlink/af_netlink.c:1815) 
[ 127.031829][ T1290] ? __import_iovec (lib/iov_iter.c:1441 lib/iov_iter.c:1456) 
[ 127.032144][ T1290] ____sys_sendmsg (net/socket.c:714 net/socket.c:729 net/socket.c:2614) 
[ 127.032456][ T1290] ? __pfx_____sys_sendmsg (net/socket.c:2560) 
[ 127.032749][ T1290] ? __pfx_copy_msghdr_from_user (net/socket.c:2540) 
[ 127.033124][ T1290] ___sys_sendmsg (net/socket.c:2670) 
[ 127.033426][ T1290] ? kasan_record_aux_stack (mm/kasan/generic.c:548) 
[ 127.033721][ T1290] ? __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) 
[ 127.034107][ T1290] ? __pfx____sys_sendmsg (net/socket.c:2657) 
[ 127.034420][ T1290] ? find_held_lock (kernel/locking/lockdep.c:5353) 
[ 127.034718][ T1290] ? __lock_acquire (kernel/locking/lockdep.c:5240) 
[ 127.035018][ T1290] ? find_held_lock (kernel/locking/lockdep.c:5353) 
[ 127.035307][ T1290] ? __virt_addr_valid (./include/linux/rcupdate.h:341 ./include/linux/rcupdate.h:953 ./include/linux/mmzone.h:2168 arch/x86/mm/physaddr.c:65) 
[ 127.035628][ T1290] ? __lock_release (kernel/locking/lockdep.c:5539) 
[ 127.035928][ T1290] __sys_sendmsg (net/socket.c:2700) 
[ 127.036221][ T1290] ? __call_rcu_common.constprop.0 (kernel/rcu/tree.c:3119) 
[ 127.036845][ T1290] ? __pfx___sys_sendmsg (net/socket.c:2685) 
[ 127.037154][ T1290] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:745) 
[ 127.037459][ T1290] do_syscall_64 (arch/x86/entry/syscall_64.c:63 arch/x86/entry/syscall_64.c:94) 
[ 127.037954][ T1290] entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:130) 
[  127.038325][ T1290] RIP: 0033:0x7f841b9a21e7
[ 127.038668][ T1290] 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)
[  127.039897][ T1290] RSP: 002b:00007ffeb75cf3c8 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
[  127.040343][ T1290] RAX: ffffffffffffffda RBX: 00007ffeb75cfb00 RCX: 00007f841b9a21e7
[  127.040981][ T1290] RDX: 0000000000000000 RSI: 00007ffeb75cf430 RDI: 0000000000000005
[  127.041427][ T1290] RBP: 0000000000000003 R08: 0000000000000003 R09: 0000000000000078
[  127.041858][ T1290] R10: 00007f841b89f498 R11: 0000000000000246 R12: 0000000000000003


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