Changeset 77954 in vbox for trunk/src/VBox/Devices/Graphics

Timestamp:

Mar 29, 2019 5:13:58 PM (6 years ago)

Author:

vboxsync

Message:

SVGA: Fixed thinkos (bugref:9424).

File:

• trunk/src/VBox/Devices/Graphics/DevVGA-SVGA.cpp (modified) (1 diff)

trunk/src/VBox/Devices/Graphics/DevVGA-SVGA.cpp

@@ -1480 +1480 @@
 
     /* Sanitize values. */
-    uFifoPitchLock = (uint16_t)uFifoPitchLock;
-    uRegPitchLock  = (uint16_t)uFifoPitchLock;
+    if ((uFifoPitchLock < 200) || (uFifoPitchLock > 32768))
+        uFifoPitchLock = 0;
+    if ((uRegPitchLock  < 200) || (uRegPitchLock  > 32768))
+        uRegPitchLock = 0;
 
     /* Prefer the register value to the FIFO value.*/
-    if (pThis->svga.u32PitchLock)
+    if (uRegPitchLock)
         pThis->svga.cbScanline = pThis->svga.u32PitchLock;
-    if (uFifoPitchLock)
+    else if (uFifoPitchLock)
         pThis->svga.cbScanline = uFifoPitchLock;
     else