[11091.038684] BUG: unable to handle kernel paging request at 0000000016955018
[11091.039305] IP: [<ffffffffc044b285>] VbglPhysHeapFree+0xb5/0x160 [vboxguest]
[11091.039788] PGD 0
[11091.040261] Oops: 0002 [#1] SMP
[11091.040695] Modules linked in: pppoe pppox vboxsf(OE) ip6table_filter ip6_tables iptable_filter joydev snd_intel8x0 snd_ac97_codec ac97_bus snd_pcm snd_seq_midi snd_seq_midi_event snd_rawmidi snd_seq intel_rapl_perf vboxvideo(OE) ttm input_leds snd_seq_device serio_raw drm_kms_helper snd_timer snd soundcore drm i2c_piix4 mac_hid lpc_ich vboxguest(OE) fb_sys_fops syscopyarea sysfillrect sysimgblt parport_pc ppdev lp parport ip_tables x_tables autofs4 hid_generic usbhid hid fjes video pata_acpi ahci e1000 psmouse libahci
[11091.043664] CPU: 0 PID: 2201 Comm: transmission-qt Tainted: G           OE   4.8.0-34-generic #36-Ubuntu
[11091.044693] Hardware name: innotek GmbH VirtualBox/VirtualBox, BIOS VirtualBox 12/01/2006
[11091.045214] task: ffff90e475be8000 task.stack: ffff90e474e1c000
[11091.045698] RIP: 0010:[<ffffffffc044b285>]  [<ffffffffc044b285>] VbglPhysHeapFree+0xb5/0x160 [vboxguest]
[11091.046780] RSP: 0018:ffff90e474e1f9a0  EFLAGS: 00010206
[11091.047275] RAX: ffff90e4774d0300 RBX: ffff90e4774d0284 RCX: ffff90e4774d025c
[11091.047828] RDX: 0000000016955000 RSI: ffff90e4774d025c RDI: ffff90e4774d0000
[11091.048345] RBP: ffff90e474e1f9a8 R08: 0000000000000000 R09: 0000000000000003
[11091.048877] R10: 0000000000000000 R11: ffff90e4f4e1ffff R12: 0000000000000000
[11091.049417] R13: 0000000000000003 R14: ffff90e4774d02e0 R15: 0000000000000003
[11091.049934] FS:  00007f124031c700(0000) GS:ffff90e47fe00000(0000) knlGS:0000000000000000
[11091.050456] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[11091.051002] CR2: 0000000016955018 CR3: 00000000b4f05000 CR4: 00000000000006f0
[11091.051516] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[11091.052091] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[11091.052602] Stack:
[11091.053109]  ffff90e4774d0284 ffff90e474e1f9c0 ffffffffc04497ee ffff90e474e1fcf0
[11091.053651]  ffff90e474e1fb78 ffffffffc044a0c3 ffff90e474e1fa20 0000000000000282
[11091.054147]  ffff90e4774d02d0 ffff90e474e1fce0 ffffffffc0471700 ffffffffc0446520
[11091.054705] Call Trace:
[11091.055225]  [<ffffffffc04497ee>] VbglGRFree+0x1e/0x30 [vboxguest]
[11091.055733]  [<ffffffffc044a0c3>] VbglR0HGCMInternalCall+0x6b3/0xe10 [vboxguest]
[11091.056264]  [<ffffffffc0446520>] ? vgdrvHgcmAsyncWaitCallbackWorker+0x210/0x210 [vboxguest]
[11091.056816]  [<ffffffffc044b7c2>] ? VBoxGuest_RTMemFree+0x22/0x30 [vboxguest]
[11091.057348]  [<ffffffffc044bc73>] ? VBoxGuest_RTR0MemObjFree+0x183/0x2d0 [vboxguest]
[11091.057833]  [<ffffffffc0449da9>] ? VbglR0HGCMInternalCall+0x399/0xe10 [vboxguest]
[11091.058344]  [<ffffffffc0446520>] ? vgdrvHgcmAsyncWaitCallbackWorker+0x210/0x210 [vboxguest]
[11091.058864]  [<ffffffffc0445bc4>] vgdrvIoCtl_HGCMCall+0x234/0x2d0 [vboxguest]
[11091.059374]  [<ffffffffc04479f4>] VGDrvCommonIoCtl+0x264/0x1c60 [vboxguest]
[11091.059888]  [<ffffffffc0444284>] VBoxGuestIDCCall+0x64/0x70 [vboxguest]
[11091.060366]  [<ffffffffc061e836>] vbglDriverIOCtl+0x16/0x20 [vboxsf]
[11091.060838]  [<ffffffffc061f573>] VbglHGCMCall+0x43/0x90 [vboxsf]
[11091.061321]  [<ffffffffc061fc1e>] VbglR0SfCreate+0x8e/0xb0 [vboxsf]
[11091.061792]  [<ffffffffc061da4d>] sf_stat+0x5d/0x100 [vboxsf]
[11091.062237]  [<ffffffffc061db7c>] sf_inode_revalidate+0x8c/0xe0 [vboxsf]
[11091.062670]  [<ffffffffc061d24f>] ? sf_reg_read+0x14f/0x180 [vboxsf]
[11091.063060]  [<ffffffffc061dc1e>] sf_getattr+0x1e/0x40 [vboxsf]
[11091.063440]  [<ffffffffa8bc108d>] ? apparmor_inode_getattr+0x1d/0x20
[11091.063818]  [<ffffffffa8a38bc9>] vfs_getattr_nosec+0x29/0x40
[11091.064184]  [<ffffffffa8a38de6>] vfs_getattr+0x26/0x30
[11091.064573]  [<ffffffffa8a38e23>] vfs_fstat+0x33/0x60
[11091.064955]  [<ffffffffa8a39524>] SYSC_newfstat+0x24/0x60
[11091.065344]  [<ffffffffa8a33a4b>] ? vfs_read+0x11b/0x130
[11091.065732]  [<ffffffffa8a35033>] ? SyS_pread64+0x63/0xb0
[11091.066113]  [<ffffffffa8a395ce>] SyS_newfstat+0xe/0x10
[11091.066526]  [<ffffffffa909c2b6>] entry_SYSCALL_64_fastpath+0x1e/0xa8
[11091.066932] Code: 48 89 c1 48 01 d8 48 01 fa 48 39 d0 73 46 f6 40 08 01 75 40 8b 50 04 8d 54 11 28 89 53 dc 48 8b 50 10 48 85 d2 74 0c 48 8b 48 18 <48> 89 4a 18 48 8b 50 10 48 8b 48 18 48 85 c9 74 74 48 89 51 10
[11091.068119] RIP  [<ffffffffc044b285>] VbglPhysHeapFree+0xb5/0x160 [vboxguest]
[11091.068547]  RSP <ffff90e474e1f9a0>
[11091.068956] CR2: 0000000016955018
[11091.069346] fbcon_switch: detected unhandled fb_set_par error, error code -16
[11091.070447] fbcon_switch: detected unhandled fb_set_par error, error code -16
[11091.071721] ---[ end trace 8875d67b88e5f5f0 ]---