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Description: set geometry property in QXcbWindow after checking minimum size
QXcbWindow::create() bound the window's size to windowMinimumSize(),
after its size had been inherited from parent().
QPlatformWindow::setGeometry() was called before that sanity check.
.
When a fullscreen window is re-mapped from a deactivated screen to the
remaining screen, the call to QPlatformWindow::setGeometry() assigns
an invalid QRect to QPlatformWindowPrivate::rect
The negative int values x2 and/or y2 cause
QXcbBackingStoreImage::flushPixmap to address unmapped memory and
crash.
.
This patch moves the call to QPlatformWindow::setGeometry() from
before to after bounding to a minimum value. That assures a valid
rectangle to be assigned in all cases.
Origin: upstream, https://code.qt.io/cgit/qt/qtbase.git/commit/?id=6a3627b6c5aa5109
Last-Update: 2023-01-04
--- a/src/plugins/platforms/xcb/qxcbwindow.cpp
+++ b/src/plugins/platforms/xcb/qxcbwindow.cpp
@@ -299,11 +299,6 @@ void QXcbWindow::create()
return;
}
- QPlatformWindow::setGeometry(rect);
-
- if (platformScreen != currentScreen)
- QWindowSystemInterface::handleWindowScreenChanged(window(), platformScreen->QPlatformScreen::screen());
-
const QSize minimumSize = windowMinimumSize();
if (rect.width() > 0 || rect.height() > 0) {
rect.setWidth(qBound(1, rect.width(), XCOORD_MAX));
@@ -315,6 +310,11 @@ void QXcbWindow::create()
rect.setHeight(QHighDpi::toNativePixels(int(defaultWindowHeight), platformScreen->QPlatformScreen::screen()));
}
+ QPlatformWindow::setGeometry(rect);
+
+ if (platformScreen != currentScreen)
+ QWindowSystemInterface::handleWindowScreenChanged(window(), platformScreen->QPlatformScreen::screen());
+
xcb_window_t xcb_parent_id = platformScreen->root();
if (parent()) {
xcb_parent_id = static_cast<QXcbWindow *>(parent())->xcb_window();
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