Changeset 70298 in vbox for trunk/src

Timestamp:

Dec 22, 2017 1:51:33 AM (7 years ago)

Author:

vboxsync

Message:

VDVfs.cpp: Fixed bug in vdReadHelper when handling unaligned reads, ended up with negative size. Just rewrote it a little bit. Applied the same fixes to vdWriteHelper. [bugfix]

File:

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

trunk/src/VBox/Storage/VDVfs.cpp

@@ -113 +113 @@
             Assert(cbRead < 512);
             Assert(!(off % 512));
+            Assert(cbMisalign > 0);
 
             rc = VDRead(pDisk, off, abBuf, 512);
@@ -185 +186 @@
         /* Unaligned buffered read+write of tail. */
         if (   RT_SUCCESS(rc)
-            && cbMisalign)
-        {
+            && cbWrite > 0)
+        {
+            Assert(cbMisalign > 0);
             Assert(cbWrite < 512);
             Assert(!(off % 512));