Changeset 73852 in vbox for trunk/src/VBox/HostDrivers/VBoxNetFlt/win

Timestamp:

Aug 23, 2018 8:51:08 AM (7 years ago)

Author:

vboxsync

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

124545

Message:

NetLwf/Win: (bugref:9233) Ignore empty MDLs to prevent Windows host crashes.

File:

• trunk/src/VBox/HostDrivers/VBoxNetFlt/win/drv/VBoxNetLwf-win.cpp (modified) (2 diffs)

trunk/src/VBox/HostDrivers/VBoxNetFlt/win/drv/VBoxNetLwf-win.cpp

@@ -1393 +1393 @@
     ULONG cSegs = 0;
     for (PMDL pMdl = NET_BUFFER_CURRENT_MDL(pNetBuf); pMdl; pMdl = NDIS_MDL_LINKAGE(pMdl))
-        cSegs++;
+    {
+        /* Skip empty MDLs (see @bugref{9233}) */
+        if (MmGetMdlByteCount(pMdl))
+            cSegs++;
+    }
     return cSegs;
 }
@@ -1618 +1622 @@
         }
         ULONG cbSrc = MmGetMdlByteCount(pMdl);
+        if (cbSrc == 0)
+            continue; /* Skip empty MDLs (see @bugref{9233}) */
+
         if (uOffset)
         {