[hpoussin] 20277: Don't try to dereference possible NULL pointers

Don't try to dereference possible NULL pointers
Modified: trunk/reactos/lib/setupapi/devinst.c
  _____  

Modified: trunk/reactos/lib/setupapi/devinst.c
--- trunk/reactos/lib/setupapi/devinst.c	2005-12-20 19:54:25 UTC
(rev 20276)
+++ trunk/reactos/lib/setupapi/devinst.c	2005-12-20 20:07:40 UTC
(rev 20277)
@@ -5311,13 +5311,18 @@

         NULL);
 
     /* Copy MatchingId information */
-    driverInfo->MatchingId = HeapAlloc(GetProcessHeap(), 0,
(wcslen(MatchingId) + 1) * sizeof(WCHAR));
-    if (!driverInfo->MatchingId)
+    if (MatchingId)
     {
-        SetLastError(ERROR_NOT_ENOUGH_MEMORY);
-        goto cleanup;
+        driverInfo->MatchingId = HeapAlloc(GetProcessHeap(), 0,
(wcslen(MatchingId) + 1) * sizeof(WCHAR));
+        if (!driverInfo->MatchingId)
+        {
+            SetLastError(ERROR_NOT_ENOUGH_MEMORY);
+            goto cleanup;
+        }
+        RtlCopyMemory(driverInfo->MatchingId, MatchingId,
(wcslen(MatchingId) + 1) * sizeof(WCHAR));
     }
-    RtlCopyMemory(driverInfo->MatchingId, MatchingId,
(wcslen(MatchingId) + 1) * sizeof(WCHAR));
+    else
+        driverInfo->MatchingId = NULL;
 
     /* Get inf install section */
     Result = FALSE;
@@ -6313,10 +6318,12 @@
         SetLastError(ERROR_INVALID_USER_BUFFER);
     else
     {
-        struct DeviceInfoElement *devInfo = (struct DeviceInfoElement
*)DeviceInfoData->Reserved;
+        struct DeviceInfoElement *devInfo = NULL;
         PLIST_ENTRY ItemList;
+        if (DeviceInfoData)
+            devInfo = (struct DeviceInfoElement
*)DeviceInfoData->Reserved;
         if (DriverType == SPDIT_CLASSDRIVER ||
-            devInfo->CreationFlags & DICD_INHERIT_CLASSDRVS)
+            (devInfo && devInfo->CreationFlags &
DICD_INHERIT_CLASSDRVS))
         {
             ListHead = &((struct DeviceInfoSet
*)DeviceInfoSet)->DriverListHead;
         }