XFree86 DGA: Guard against NULL pointer dereferences.
Ass, u, me ...
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@ -423,17 +423,19 @@ xf86PostMotionEvent(DeviceIntPtr device,
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#if XFreeXDGA
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if (first_valuator == 0 && num_valuators >= 2) {
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index = miPointerGetScreen(inputInfo.pointer)->myNum;
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if (is_absolute) {
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dx = valuators[0] - device->valuator->lastx;
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dy = valuators[1] - device->valuator->lasty;
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if (miPointerGetScreen(inputInfo.pointer)) {
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index = miPointerGetScreen(inputInfo.pointer)->myNum;
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if (is_absolute) {
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dx = valuators[0] - device->valuator->lastx;
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dy = valuators[1] - device->valuator->lasty;
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}
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else {
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dx = valuators[0];
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dy = valuators[1];
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}
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if (DGAStealMotionEvent(index, dx, dy))
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goto out;
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}
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else {
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dx = valuators[0];
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dy = valuators[1];
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}
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if (DGAStealMotionEvent(index, dx, dy))
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goto out;
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}
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#endif
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@ -505,9 +507,11 @@ xf86PostButtonEvent(DeviceIntPtr device,
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int index;
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#if XFreeXDGA
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index = miPointerGetScreen(inputInfo.pointer)->myNum;
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if (DGAStealButtonEvent(index, button, is_down))
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return;
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if (miPointerGetScreen(inputInfo.pointer)) {
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index = miPointerGetScreen(inputInfo.pointer)->myNum;
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if (DGAStealButtonEvent(index, button, is_down))
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return;
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}
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#endif
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valuators = xcalloc(sizeof(int), num_valuators);
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@ -588,9 +592,11 @@ xf86PostKeyboardEvent(DeviceIntPtr device,
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int index;
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#if XFreeXDGA
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index = miPointerGetScreen(inputInfo.pointer)->myNum;
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if (DGAStealKeyEvent(index, key_code, is_down))
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return;
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if (miPointerGetScreen(inputInfo.pointer)) {
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index = miPointerGetScreen(inputInfo.pointer)->myNum;
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if (DGAStealKeyEvent(index, key_code, is_down))
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return;
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}
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#endif
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if (!xf86Events)
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