Changeset 68591 in vbox

Timestamp:

Aug 31, 2017 1:05:12 PM (8 years ago)

Author:

vboxsync

svn:sync-xref-src-repo-rev:

117809

Message:

Devices/Storage/VD: Disable zero copy optimization for 4KB transfers because that breaks with encryption enabled (the plugin encrypts data in place trashing guest memory)

File:

• trunk/src/VBox/Devices/Storage/DrvVD.cpp (modified) (2 diffs)

trunk/src/VBox/Devices/Storage/DrvVD.cpp

@@ -3113 +3113 @@
     LogFlowFunc(("pThis=%#p pIoReq=%#p cb=%zu\n", pThis, pIoReq, cb));
 
+/** @todo: This does not work at all with encryption enabled because the encryption plugin
+ *         encrypts the data in place trashing guest memory and causing data corruption later on!
+ *
+ * DO NOT ENABLE UNLESS YOU WANT YOUR DATA SHREDDED!!!
+ */
+#if 0
     if (   cb == _4K
         && pThis->pDrvMediaExPort->pfnIoReqQueryBuf)
@@ -3134 +3140 @@
         }
     }
+#endif
 
     if (RT_FAILURE(rc))