title: Vagrant VirtualBox (Ubuntu Trusty) stops responding after several days
body: <p>I am running Ubuntu 14.04.1 LTS (GNU/Linux 3.13.0-32-generic x86_64) using Vagrant [vagrant:amd64 1:1.6.3] (VirtualBox). My host system is the same OS version.</p>
  
  <p>After several days of flawless (or so it seems) operation, the vagrant box will stop responding... or more specifically:</p>
  
  <ol>
  <li>My Supervisor managed services no longer respond (webserver etc...).</li>
  <li>I <strong>can</strong> <code>vagrant ssh</code> into the box and navigate around most directories</li>
  <li>Anything interacting with the shared <code>/vagrant</code> directory will not respond (including <code>sudo supervisorctl</code>).</li>
  <li>Running <code>vagrant halt</code> from the host machine will fail to halt peacefully and will eventually forcefully be halted.</li>
  <li>Re-upping the box afterwards will then give several more happy days.</li>
  </ol>
  
  <p>The only thing that I can see (that might be of relevance) in <code>/var/log/syslog</code> is the following:</p>
  
  <pre><code>Aug 20 22:45:31 vagrant-ubuntu-trusty-64 kernel: [226490.711678] BUG: unable to handle kernel paging request at 0000006c0000003f
  Aug 20 22:45:31 vagrant-ubuntu-trusty-64 kernel: [226490.714065] IP: [&lt;ffffffffa00a10f6&gt;] vbglPhysHeapExcludeBlock+0x16/0x60 [vboxguest]
  Aug 20 22:45:31 vagrant-ubuntu-trusty-64 kernel: [226490.714663] PGD 3c7c7067 PUD 0
  Aug 20 22:45:31 vagrant-ubuntu-trusty-64 kernel: [226490.714663] Oops: 0002 [#1] SMP
  Aug 20 22:45:31 vagrant-ubuntu-trusty-64 kernel: [226490.714663] Modules linked in: rpcsec_gss_krb5 nfsv4 vboxsf(OF) nfsd auth_rpcgss nfs_acl nfs lockd sunrpc fscache dm_crypt ppdev serio_raw parport_pc vboxguest(OF) parport ahci psmouse libahci e1000
  Aug 20 22:45:31 vagrant-ubuntu-trusty-64 kernel: [226490.714663] CPU: 0 PID: 1632 Comm: vminfo Tainted: GF          O 3.13.0-32-generic #57-Ubuntu
  Aug 20 22:45:31 vagrant-ubuntu-trusty-64 kernel: [226490.714663] Hardware name: innotek GmbH VirtualBox/VirtualBox, BIOS VirtualBox 12/01/2006
  Aug 20 22:45:31 vagrant-ubuntu-trusty-64 kernel: [226490.714663] task: ffff88003c202fe0 ti: ffff88003cd20000 task.ti: ffff88003cd20000
  Aug 20 22:45:31 vagrant-ubuntu-trusty-64 kernel: [226490.714663] RIP: 0010:[&lt;ffffffffa00a10f6&gt;]  [&lt;ffffffffa00a10f6&gt;] vbglPhysHeapExcludeBlock+0x16/0x60 [vboxguest]
  Aug 20 22:45:31 vagrant-ubuntu-trusty-64 kernel: [226490.714663] RSP: 0018:ffff88003cd21d78  EFLAGS: 00010206
  Aug 20 22:45:31 vagrant-ubuntu-trusty-64 kernel: [226490.714663] RAX: 0000006c00000027 RBX: ffff88003ce5014c RCX: ffff88003ce60000
  Aug 20 22:45:31 vagrant-ubuntu-trusty-64 kernel: [226490.714663] RDX: ffff88003ce50124 RSI: ffff88003ce50124 RDI: ffff88003ce5016c
  Aug 20 22:45:31 vagrant-ubuntu-trusty-64 kernel: [226490.714663] RBP: ffff88003cd21d78 R08: 0000000000000292 R09: ffff88003ce5014c
  Aug 20 22:45:31 vagrant-ubuntu-trusty-64 kernel: [226490.714663] R10: ffff88003c6fcc10 R11: 0000000000000246 R12: ffff88003ce50124
  Aug 20 22:45:31 vagrant-ubuntu-trusty-64 kernel: [226490.714663] R13: ffff88003ce5014c R14: 0000000000000020 R15: 0000000000000000
  Aug 20 22:45:31 vagrant-ubuntu-trusty-64 kernel: [226490.714663] FS:  00007fc8b5475700(0000) GS:ffff88003fc00000(0000) knlGS:0000000000000000
  Aug 20 22:45:31 vagrant-ubuntu-trusty-64 kernel: [226490.714663] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
  Aug 20 22:45:31 vagrant-ubuntu-trusty-64 kernel: [226490.714663] CR2: 0000006c0000003f CR3: 000000003ccf0000 CR4: 00000000000006f0
  Aug 20 22:45:31 vagrant-ubuntu-trusty-64 kernel: [226490.714663] Stack:
  Aug 20 22:45:31 vagrant-ubuntu-trusty-64 kernel: [226490.714663]  ffff88003cd21d98 ffffffffa00a1609 ffff88003ce5014c ffff88003cd21e70
  Aug 20 22:45:31 vagrant-ubuntu-trusty-64 kernel: [226490.714663]  ffff88003cd21db0 ffffffffa009faae ffff88003cd21e78 ffff88003cd21e38
  Aug 20 22:45:31 vagrant-ubuntu-trusty-64 kernel: [226490.714663]  ffffffffa009de5e ffff880000000000 0000000000000000 0000000000000050
  Aug 20 22:45:31 vagrant-ubuntu-trusty-64 kernel: [226490.714663] Call Trace:
  Aug 20 22:45:31 vagrant-ubuntu-trusty-64 kernel: [226490.714663]  [&lt;ffffffffa00a1609&gt;] VbglPhysHeapFree+0xc9/0xe0 [vboxguest]
  Aug 20 22:45:31 vagrant-ubuntu-trusty-64 kernel: [226490.714663]  [&lt;ffffffffa009faae&gt;] VbglGRFree+0x1e/0x30 [vboxguest]
  Aug 20 22:45:31 vagrant-ubuntu-trusty-64 kernel: [226490.714663]  [&lt;ffffffffa009de5e&gt;] VBoxGuestCommonIOCtl+0x54e/0x1b90 [vboxguest]
  Aug 20 22:45:31 vagrant-ubuntu-trusty-64 kernel: [226490.714663]  [&lt;ffffffff811a103b&gt;] ? kfree+0xab/0x140
  Aug 20 22:45:31 vagrant-ubuntu-trusty-64 kernel: [226490.714663]  [&lt;ffffffffa009b7ce&gt;] vboxguestLinuxIOCtl+0x9e/0x200 [vboxguest]
  Aug 20 22:45:31 vagrant-ubuntu-trusty-64 kernel: [226490.714663]  [&lt;ffffffff8101b7e9&gt;] ? sched_clock+0x9/0x10
  Aug 20 22:45:31 vagrant-ubuntu-trusty-64 kernel: [226490.714663]  [&lt;ffffffff8109d1ad&gt;] ? sched_clock_local+0x1d/0x80
  Aug 20 22:45:31 vagrant-ubuntu-trusty-64 kernel: [226490.714663]  [&lt;ffffffff811cfd10&gt;] do_vfs_ioctl+0x2e0/0x4c0
  Aug 20 22:45:31 vagrant-ubuntu-trusty-64 kernel: [226490.714663]  [&lt;ffffffff8109ddf4&gt;] ? vtime_account_user+0x54/0x60
  Aug 20 22:45:31 vagrant-ubuntu-trusty-64 kernel: [226490.714663]  [&lt;ffffffff811cff71&gt;] SyS_ioctl+0x81/0xa0
  Aug 20 22:45:31 vagrant-ubuntu-trusty-64 kernel: [226490.714663]  [&lt;ffffffff8172c87f&gt;] tracesys+0xe1/0xe6
  Aug 20 22:45:31 vagrant-ubuntu-trusty-64 kernel: [226490.714663] Code: 05 00 00 c7 05 c8 05 02 00 00 00 00 00 5d c3 66 0f 1f 44 00 00 66 66 66 66 90 48 8b 47 10 55 48 89 e5 48 85 c0 74 0c 48 8b 57 18 &lt;48&gt; 89 50 18 488 8b 47 10 48 8b 57 18 48 85 d2 74 19 48 89 42 10
  Aug 20 22:45:31 vagrant-ubuntu-trusty-64 kernel: [226490.714663] RIP  [&lt;ffffffffa00a10f6&gt;] vbglPhysHeapExcludeBlock+0x16/0x60 [vboxguest]
  Aug 20 22:45:31 vagrant-ubuntu-trusty-64 kernel: [226490.714663]  RSP &lt;ffff88003cd21d78&gt;
  Aug 20 22:45:31 vagrant-ubuntu-trusty-64 kernel: [226490.714663] CR2: 0000006c0000003f
  Aug 20 22:45:31 vagrant-ubuntu-trusty-64 kernel: [226490.828096] ---[ end trace 1eefe230ded2b9f8 ]---
  </code></pre>
  
  <p>Happy to supply any more information that people request that I've missed out.</p>