Changeset 70226 in vbox for trunk/src/VBox/Additions

Timestamp:

Dec 19, 2017 6:40:41 PM (7 years ago)

Author:

vboxsync

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

119818

Message:

VBoxGuest.cpp/VGDrvCommonISR: Don't assume pVMMDevMemory is valid.

File:

• trunk/src/VBox/Additions/common/VBoxGuest/VBoxGuest.cpp (modified) (3 diffs)

trunk/src/VBox/Additions/common/VBoxGuest/VBoxGuest.cpp

@@ -4236 +4236 @@
 bool VGDrvCommonIsOurIRQ(PVBOXGUESTDEVEXT pDevExt)
 {
+    VMMDevMemory volatile *pVMMDevMemory;
+    bool fOurIrq;
+
     RTSpinlockAcquire(pDevExt->EventSpinlock);
-    bool const fOurIrq = pDevExt->pVMMDevMemory->V.V1_04.fHaveEvents;
+    pVMMDevMemory = pDevExt->pVMMDevMemory;
+    fOurIrq = pVMMDevMemory ? pVMMDevMemory->V.V1_04.fHaveEvents : false;
     RTSpinlockRelease(pDevExt->EventSpinlock);
 
@@ -4257 +4261 @@
     bool                    fMousePositionChanged = false;
     int                     rc                    = 0;
+    VMMDevMemory volatile  *pVMMDevMemory;
     bool                    fOurIrq;
 
@@ -4269 +4274 @@
      */
     RTSpinlockAcquire(pDevExt->EventSpinlock);
-    fOurIrq = pDevExt->pVMMDevMemory->V.V1_04.fHaveEvents;
+    pVMMDevMemory = pDevExt->pVMMDevMemory;
+    fOurIrq = pVMMDevMemory ? pVMMDevMemory->V.V1_04.fHaveEvents : false;
     if (fOurIrq)
     {