Changeset 95049 in vbox

Timestamp:

May 20, 2022 8:05:44 AM (3 years ago)

Author:

vboxsync

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

151512

Message:

Additions/VBoxTray: Fixed regression introduced in r117497, which caused a debug assertion + crash on startup on NT4 guests; make sure that we never try to run anything else but VBOXDISPIF_MODE_XPDM_NT4 on NT4 guests. Anything else will get us into serious trouble.

File:

• trunk/src/VBox/Additions/WINNT/VBoxTray/VBoxDispIf.cpp (modified) (2 diffs)

trunk/src/VBox/Additions/WINNT/VBoxTray/VBoxDispIf.cpp

@@ -671 +671 @@
 DWORD VBoxDispIfInit(PVBOXDISPIF pDispIf)
 {
+    /* Note: NT4 is handled implicitly by VBoxDispIfSwitchMode(). */
     VBoxDispIfSwitchMode(pDispIf, VBOXDISPIF_MODE_XPDM, NULL);
 
@@ -2601 +2602 @@
         return NO_ERROR;
 
+    /* Make sure that we never try to run anything else but VBOXDISPIF_MODE_XPDM_NT4 on NT4 guests.
+     * Anything else will get us into serious trouble. */
+    if (RTSystemGetNtVersion() < RTSYSTEM_MAKE_NT_VERSION(5, 0, 0))
+        enmMode = VBOXDISPIF_MODE_XPDM_NT4;
+
 #ifdef VBOX_WITH_WDDM
     if (pIf->enmMode >= VBOXDISPIF_MODE_WDDM)