diff -Nru virtualbox-5.0.18-dfsg/debian/changelog virtualbox-5.0.18-dfsg/debian/changelog
--- virtualbox-5.0.18-dfsg/debian/changelog	2016-04-19 14:45:43.000000000 +0000
+++ virtualbox-5.0.18-dfsg/debian/changelog	2016-04-20 09:08:38.000000000 +0000
@@ -1,3 +1,11 @@
+virtualbox (5.0.18-dfsg-2build1) xenial; urgency=high
+
+  * d/p/fix-guest-failure.patch
+    - fix guest issue causing writes to the disk to fail.
+    (lowering the version, to avoid a sync from unstable)
+
+ -- Gianfranco Costamagna <locutusofborg@debian.org>  Wed, 20 Apr 2016 11:04:27 +0200
+
 virtualbox (5.0.18-dfsg-2) unstable; urgency=medium
 
   [ Adam Conrad ]
diff -Nru virtualbox-5.0.18-dfsg/debian/patches/fix-guest-failure.patch virtualbox-5.0.18-dfsg/debian/patches/fix-guest-failure.patch
--- virtualbox-5.0.18-dfsg/debian/patches/fix-guest-failure.patch	1970-01-01 00:00:00.000000000 +0000
+++ virtualbox-5.0.18-dfsg/debian/patches/fix-guest-failure.patch	2016-04-20 09:04:23.000000000 +0000
@@ -0,0 +1,15 @@
+Description: fix https://www.virtualbox.org/ticket/15317
+cherry-pick from upstream: 
+https://www.virtualbox.org/changeset/60565/vbox/trunk/src/VBox/Devices/Storage/DevLsiLogicSCSI.cpp#file0
+
+--- virtualbox-5.0.18-dfsg.orig/src/VBox/Devices/Storage/DevLsiLogicSCSI.cpp
++++ virtualbox-5.0.18-dfsg/src/VBox/Devices/Storage/DevLsiLogicSCSI.cpp
+@@ -3889,7 +3889,7 @@ static DECLCALLBACK(int) lsilogicR3IsaIO
+     else if (RT_FAILURE(rc))
+         AssertMsgFailed(("Writing BIOS register failed %Rrc\n", rc));
+ 
+-    return rc;
++    return VINF_SUCCESS;
+ }
+ 
+ /**
diff -Nru virtualbox-5.0.18-dfsg/debian/patches/series virtualbox-5.0.18-dfsg/debian/patches/series
--- virtualbox-5.0.18-dfsg/debian/patches/series	2016-04-19 14:45:18.000000000 +0000
+++ virtualbox-5.0.18-dfsg/debian/patches/series	2016-04-20 09:03:56.000000000 +0000
@@ -15,3 +15,4 @@
 35-libvdeplug-soname.patch
 36-fix-vnc-version-string.patch
 99-vboxvideo-module-version.patch
+fix-guest-failure.patch