======================================
| 0
| xx__-> [   21.075594][  T267] ------------[ cut here ]------------
| [ 21.076052][ T267] WARNING: CPU: 0 PID: 267 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) 
| [   21.076703][  T267] Modules linked in:
[   21.077530][  T267] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[ 21.077906][ T267] 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) 
[ 21.078218][ T267] Code: 00 00 8b 05 c7 0f 19 02 85 c0 0f 84 52 fe ff ff 48 8d bb 80 0c 00 00 be ff ff ff ff e8 0a 9e 74 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 c7 0f 19 02    	mov    0x2190fc7(%rip),%eax        # 0x2190fcf
   8:	85 c0                	test   %eax,%eax
   a:	0f 84 52 fe ff ff    	je     0xfffffffffffffe62
  10:	48 8d bb 80 0c 00 00 	lea    0xc80(%rbx),%rdi
  17:	be ff ff ff ff       	mov    $0xffffffff,%esi
  1c:	e8 0a 9e 74 00       	call   0x749e2b
  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
[   21.079257][  T267] RSP: 0018:ffffc90000b97930 EFLAGS: 00010246
[   21.079645][  T267] RAX: 0000000000000000 RBX: ffff88800519c000 RCX: 0000000000000001
[   21.080285][  T267] RDX: 0000000000000000 RSI: ffffffffa4c88ba1 RDI: ffffffffa44555a0
[   21.080729][  T267] RBP: ffffc90000b97a18 R08: ffff88800519c008 R09: 0000000000000000
[   21.081159][  T267] R10: ffffc90000b97a48 R11: ffffffffa5a50068 R12: 1ffff92000172f2a
[   21.081601][  T267] R13: 00000000000005f0 R14: ffffc90000b97a48 R15: ffffc90000b97d40
[   21.082033][  T267] FS:  00007f7c6d6d7740(0000) GS:ffff88808f4f1000(0000) knlGS:0000000000000000
[   21.082743][  T267] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[   21.083378][  T267] CR2: 000056132417e5e6 CR3: 0000000009631005 CR4: 0000000000772ef0
[   21.084140][  T267] PKRU: 55555554
[   21.084536][  T267] Call Trace:
[   21.084917][  T267]  <TASK>
[ 21.085184][ T267] ? __pfx_netif_set_mtu_ext (net/core/dev.c:9607) 
[ 21.085699][ T267] ? rcu_read_lock_any_held (kernel/rcu/update.c:386 kernel/rcu/update.c:380) 
[ 21.086225][ T267] ? validate_chain (kernel/locking/lockdep.c:3804 kernel/locking/lockdep.c:3824 kernel/locking/lockdep.c:3879) 
[ 21.086771][ T267] ? rcu_read_lock_any_held (kernel/rcu/update.c:386 kernel/rcu/update.c:380) 
[ 21.087263][ T267] ? validate_chain (kernel/locking/lockdep.c:3804 kernel/locking/lockdep.c:3824 kernel/locking/lockdep.c:3879) 
[ 21.087789][ T267] netif_set_mtu (net/core/dev.c:9652) 
[ 21.088274][ T267] ? __pfx_netif_set_mtu (net/core/dev.c:9647) 
[ 21.088802][ T267] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:745) 
[ 21.089330][ T267] dev_set_mtu (./include/net/netdev_lock.h:30 ./include/net/netdev_lock.h:47 net/core/dev_api.c:249) 
[ 21.089705][ T267] dev_ifsioc (net/core/dev_ioctl.c:572) 
[ 21.090206][ T267] ? __pfx_dev_ifsioc (net/core/dev_ioctl.c:553) 
[ 21.090721][ T267] ? __pfx___mutex_lock (kernel/locking/mutex.c:746) 
[ 21.091239][ T267] ? find_held_lock (kernel/locking/lockdep.c:5353) 
[ 21.091755][ T267] ? dev_load (./include/linux/rcupdate.h:341 ./include/linux/rcupdate.h:871 net/core/dev_ioctl.c:678) 
[ 21.092124][ T267] ? __lock_release (kernel/locking/lockdep.c:5539) 
[ 21.092642][ T267] dev_ioctl (net/core/dev_ioctl.c:824) 
[ 21.093033][ T267] sock_do_ioctl (net/socket.c:1252) 
[ 21.093559][ T267] ? __pfx_sock_do_ioctl (net/socket.c:1230) 
[ 21.094056][ T267] ? __pmd_alloc (./include/linux/mm.h:1512 ./include/linux/mm.h:1738 ./include/linux/mm.h:1748 ./include/linux/vmstat.h:578 ./include/linux/vmstat.h:610 ./include/linux/mm.h:2971 ./include/linux/mm.h:2976 ./include/asm-generic/pgalloc.h:160 mm/memory.c:6477) 
[ 21.094579][ T267] ? lock_vma_under_rcu (./include/linux/rcupdate.h:341 ./include/linux/rcupdate.h:871 mm/mmap_lock.c:171) 
[ 21.095073][ T267] ? __lock_release (kernel/locking/lockdep.c:5585) 
[ 21.095608][ T267] sock_ioctl (net/socket.c:1362) 
[ 21.095993][ T267] ? __pfx_sock_ioctl (net/socket.c:1266) 
[ 21.096509][ T267] ? find_held_lock (kernel/locking/lockdep.c:5353) 
[ 21.097013][ T267] ? exc_page_fault (./arch/x86/include/asm/irqflags.h:26 ./arch/x86/include/asm/irqflags.h:109 ./arch/x86/include/asm/irqflags.h:151 arch/x86/mm/fault.c:1484 arch/x86/mm/fault.c:1532) 
[ 21.097528][ T267] ? __lock_release (kernel/locking/lockdep.c:5539) 
[ 21.098035][ T267] ? exc_page_fault (./arch/x86/include/asm/irqflags.h:26 ./arch/x86/include/asm/irqflags.h:109 ./arch/x86/include/asm/irqflags.h:151 arch/x86/mm/fault.c:1484 arch/x86/mm/fault.c:1532) 
[ 21.098552][ T267] __x64_sys_ioctl (fs/ioctl.c:52 fs/ioctl.c:907 fs/ioctl.c:893 fs/ioctl.c:893) 
[ 21.099065][ T267] do_syscall_64 (arch/x86/entry/syscall_64.c:63 arch/x86/entry/syscall_64.c:94) 
[ 21.099571][ T267] entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:130) 
[   21.100197][  T267] RIP: 0033:0x7f7c6d7dde4b
[ 21.100729][ T267] Code: ff ff ff 85 c0 79 9b 49 c7 c4 ff ff ff ff 5b 5d 4c 89 e0 41 5c c3 66 0f 1f 84 00 00 00 00 00 f3 0f 1e fa b8 10 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 8b 0d 7d 4f 0f 00 f7 d8 64 89 01 48
All code
========
   0:	ff                   	(bad)
   1:	ff                   	(bad)
   2:	ff 85 c0 79 9b 49    	incl   0x499b79c0(%rbp)
   8:	c7 c4 ff ff ff ff    	mov    $0xffffffff,%esp
   e:	5b                   	pop    %rbx
   f:	5d                   	pop    %rbp
  10:	4c 89 e0             	mov    %r12,%rax
  13:	41 5c                	pop    %r12
  15:	c3                   	ret
  16:	66 0f 1f 84 00 00 00 	nopw   0x0(%rax,%rax,1)
  1d:	00 00 
  1f:	f3 0f 1e fa          	endbr64
  23:	b8 10 00 00 00       	mov    $0x10,%eax
  28:	0f 05                	syscall
  2a:*	48 3d 01 f0 ff ff    	cmp    $0xfffffffffffff001,%rax		<-- trapping instruction
  30:	73 01                	jae    0x33
  32:	c3                   	ret
  33:	48 8b 0d 7d 4f 0f 00 	mov    0xf4f7d(%rip),%rcx        # 0xf4fb7
  3a:	f7 d8                	neg    %eax
  3c:	64 89 01             	mov    %eax,%fs:(%rcx)
  3f:	48                   	rex.W

Code starting with the faulting instruction
===========================================
   0:	48 3d 01 f0 ff ff    	cmp    $0xfffffffffffff001,%rax
   6:	73 01                	jae    0x9
   8:	c3                   	ret
   9:	48 8b 0d 7d 4f 0f 00 	mov    0xf4f7d(%rip),%rcx        # 0xf4f8d
  10:	f7 d8                	neg    %eax
  12:	64 89 01             	mov    %eax,%fs:(%rcx)
  15:	48                   	rex.W
[   21.102530][  T267] RSP: 002b:00007ffead0c5408 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
[   21.103284][  T267] RAX: ffffffffffffffda RBX: 00007ffead0c5768 RCX: 00007f7c6d7dde4b
[   21.104055][  T267] RDX: 00007ffead0c5460 RSI: 0000000000008922 RDI: 0000000000000007
[   21.104829][  T267] RBP: 00007ffead0c5778 R08: 1999999999999999 R09: 0000000000000000
[   21.105584][  T267] R10: 00007f7c6d878ac0 R11: 0000000000000246 R12: 00007ffead0c6984


Finger prints:
netif_set_mtu_ext:netif_set_mtu:dev_set_mtu:dev_ifsioc:dev_ioctl