Excerpt from /var/log/kern.log (and /var/log/syslog) from when my Ubuntu system crashed after I tried to start a VirtualBox virtual machine.

VirtualBox fail

May  2 13:40:08 8573 kernel: [197063.992224] general protection fault: 0000 [#1] SMP 
May  2 13:40:08 8573 kernel: [197063.992244] CPU 7 
May  2 13:40:08 8573 kernel: [197063.992250] Modules linked in: btrfs zlib_deflate libcrc32c ufs qnx4 hfsplus hfs minix ntfs msdos jfs xfs reiserfs ext2 ipt_MASQUERADE iptable_nat bridge stp llc pci_stub vboxpci(O) vboxnetadp(O) vboxnetflt(O) vboxdrv(O) parport_pc ppdev bnep rfcomm bluetooth binfmt_misc nls_iso8859_1 dm_crypt joydev arc4 coretemp kvm_intel kvm ip6t_REJECT xt_hl ip6t_rt nf_conntrack_ipv6 nf_defrag_ipv6 ipt_REJECT xt_LOG snd_hda_codec_realtek xt_limit xt_tcpudp xt_addrtype xt_state microcode snd_hda_intel snd_hda_codec snd_hwdep uvcvideo videobuf2_core snd_pcm videodev videobuf2_vmalloc videobuf2_memops thinkpad_acpi snd_seq_midi nvram tpm_tis snd_rawmidi snd_seq_midi_event snd_seq ip6table_filter ip6_tables snd_timer snd_seq_device nf_conntrack_netbios_ns nf_conntrack_broadcast nf_nat_ftp nf_nat nf_conntrack_ipv4 nf_defrag_ipv4 snd nf_conntrack_ftp nf_conntrack iptable_filter iwlwifi mac_hid psmouse mac80211 serio_raw ip_tables x_tables soundcore snd_page_alloc lpc_ich cfg80211 lp parport mei g
May  2 13:40:08 8573 kernel: hash_clmulni_intel aesni_intel cryptd aes_x86_64 ahci libahci firewire_ohci sdhci_pci firewire_core sdhci crc_itu_t i915 drm_kms_helper e1000e drm wmi i2c_algo_bit video
May  2 13:40:08 8573 kernel: [197063.992611] 
May  2 13:40:08 8573 kernel: [197063.992612] Pid: 2833, comm: VirtualBox Tainted: G           O 3.5.0-27-generic #46-Ubuntu LENOVO 2436CTO/2436CTO
May  2 13:40:08 8573 kernel: [197063.992643] RIP: 0010:[<ffffc90005802b82>]  [<ffffc90005802b82>] 0xffffc90005802b81
May  2 13:40:08 8573 kernel: [197063.992668] RSP: 0018:ffff88007e3b3d10  EFLAGS: 00010002
May  2 13:40:08 8573 kernel: [197063.992684] RAX: 0000000000000264 RBX: ffffc9000591f340 RCX: 0000000000000000
May  2 13:40:08 8573 kernel: [197063.992705] RDX: ffffc9000591f340 RSI: 0000000000000000 RDI: ffffc9000591f000
May  2 13:40:08 8573 kernel: [197063.992725] RBP: ffff88007e3b3d58 R08: 000000000001ae80 R09: ffffc9000591f000
May  2 13:40:08 8573 kernel: [197063.992745] R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
May  2 13:40:08 8573 kernel: [197063.992765] R13: 0000000000000206 R14: ffff8801c60a58d0 R15: ffff8801c60a58d0
May  2 13:40:08 8573 kernel: [197063.992786] FS:  00007effc4f33700(0000) GS:ffff88021e3c0000(0000) knlGS:0000000000000000
May  2 13:40:08 8573 kernel: [197063.992809] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
May  2 13:40:08 8573 kernel: [197063.992826] CR2: 00007effeff4a483 CR3: 000000020da8b000 CR4: 00000000001427e0
May  2 13:40:08 8573 kernel: [197063.992846] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
May  2 13:40:08 8573 kernel: [197063.992866] DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000400
May  2 13:40:08 8573 kernel: [197063.992887] Process VirtualBox (pid: 2833, threadinfo ffff88007e3b2000, task ffff880167171700)
May  2 13:40:08 8573 kernel: [197063.992911] Stack:
May  2 13:40:08 8573 kernel: [197063.992918]  ffffc900058028f2 0000000000000010 ffffffffa067b289 00007effeff4a000
May  2 13:40:08 8573 kernel: [197063.992941]  00ffea0003117e40 ffff88007e3b3d58 ffff8801d127a810 00007effc4f32b80
May  2 13:40:08 8573 kernel: [197063.992963]  ffff880115201800 ffff88007e3b3d98 ffffffffa067b920 ffff88007e3b3db8
May  2 13:40:08 8573 kernel: [197063.992986] Call Trace:
May  2 13:40:08 8573 kernel: [197063.993001]  [<ffffffff8116de95>] ? __kmalloc+0x55/0x170
May  2 13:40:08 8573 kernel: [197063.993023]  [<ffffffffa060a535>] ? rtR0MemAllocEx+0xf5/0x170 [vboxdrv]
May  2 13:40:08 8573 kernel: [197063.993045]  [<ffffffffa060a535>] ? rtR0MemAllocEx+0xf5/0x170 [vboxdrv]
May  2 13:40:08 8573 kernel: [197063.993068]  [<ffffffffa0605892>] ? supdrvIOCtl+0x13f2/0x2880 [vboxdrv]
May  2 13:40:08 8573 kernel: [197063.993090]  [<ffffffffa060a535>] ? rtR0MemAllocEx+0xf5/0x170 [vboxdrv]
May  2 13:40:08 8573 kernel: [197063.993113]  [<ffffffffa0600438>] ? VBoxDrvLinuxIOCtl_4_1_18+0x118/0x1f0 [vboxdrv]
May  2 13:40:08 8573 kernel: [197063.993135]  [<ffffffff81194349>] ? do_vfs_ioctl+0x99/0x590
May  2 13:40:08 8573 kernel: [197063.993152]  [<ffffffff811948d9>] ? sys_ioctl+0x99/0xa0
May  2 13:40:08 8573 kernel: [197063.993169]  [<ffffffff81689a69>] ? system_call_fastpath+0x16/0x1b
May  2 13:40:08 8573 kernel: [197063.993187] Code: 00 0f 20 d8 4a 89 84 02 80 06 00 00 0f 20 e0 4a 89 84 02 88 06 00 00 48 83 e0 70 42 8b 8c 02 68 0a 00 00 23 4a 20 09 c8 0b 42 24 <0f> 22 e0 42 8b 84 02 50 0a 00 00 83 e0 04 0d 3b 00 00 80 0f 22 
May  2 13:40:08 8573 kernel: [197063.993271] RIP  [<ffffc90005802b82>] 0xffffc90005802b81
May  2 13:40:08 8573 kernel: [197063.993288]  RSP <ffff88007e3b3d10>
May  2 13:40:08 8573 kernel: [197064.005434] ---[ end trace 4dce075f6d3b879d ]---