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From 1c098f6efa9ce449bc94e71bf8e317e1d607c4f8 Mon Sep 17 00:00:00 2001
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From: Maciej Sitarz <macieksitarz@wp.pl>
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Date: Mon, 8 Jan 2018 15:01:11 +0000
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Subject: [PATCH 13/13] Fix for xembedsniproxy crash due to NULL returned from
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xcb_image_get()
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Summary:
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In my environment (Fedora 27, plasma-workspace-5.11.4-1.fc27.x86_64) xembedsniproxy crashes.
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This is caused by NULL being returned by xcb_image_get().
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This should fix or at least mitigate the problems from bugs:
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https://bugs.kde.org/show_bug.cgi?id=355463
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https://bugs.kde.org/show_bug.cgi?id=359664
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https://bugzilla.redhat.com/show_bug.cgi?id=1497829
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Reviewers: #plasma, davidedmundson
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Reviewed By: #plasma, davidedmundson
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Subscribers: broulik, plasma-devel
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Tags: #plasma
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Differential Revision: https://phabricator.kde.org/D9732
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---
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xembed-sni-proxy/sniproxy.cpp | 8 +++++++-
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1 file changed, 7 insertions(+), 1 deletion(-)
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diff --git a/xembed-sni-proxy/sniproxy.cpp b/xembed-sni-proxy/sniproxy.cpp
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index 7fb00dbb..932109d9 100644
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--- a/xembed-sni-proxy/sniproxy.cpp
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+++ b/xembed-sni-proxy/sniproxy.cpp
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@@ -288,7 +288,13 @@ QImage SNIProxy::getImageNonComposite() const
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xcb_image_t *image = xcb_image_get(c, m_windowId, 0, 0, geom->width, geom->height, 0xFFFFFFFF, XCB_IMAGE_FORMAT_Z_PIXMAP);
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// Don't hook up cleanup yet, we may use a different QImage after all
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- QImage naiveConversion = QImage(image->data, image->width, image->height, QImage::Format_ARGB32);
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+ QImage naiveConversion;
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+ if (image) {
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+ naiveConversion = QImage(image->data, image->width, image->height, QImage::Format_ARGB32);
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+ } else {
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+ qCDebug(SNIPROXY) << "Skip NULL image returned from xcb_image_get() for" << m_windowId << Title();
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+ return QImage();
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+ }
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if (isTransparentImage(naiveConversion)) {
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QImage elaborateConversion = QImage(convertFromNative(image));
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--
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2.14.3
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@ -1,17 +0,0 @@
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--- plasma-workspace-5.11.4/xembed-sni-proxy/sniproxy.cpp_orig 2018-01-08 13:40:42.070485134 +0100
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+++ plasma-workspace-5.11.4/xembed-sni-proxy/sniproxy.cpp 2018-01-08 13:42:03.734526387 +0100
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@@ -288,7 +288,13 @@
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xcb_image_t *image = xcb_image_get(c, m_windowId, 0, 0, geom->width, geom->height, 0xFFFFFFFF, XCB_IMAGE_FORMAT_Z_PIXMAP);
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// Don't hook up cleanup yet, we may use a different QImage after all
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- QImage naiveConversion = QImage(image->data, image->width, image->height, QImage::Format_ARGB32);
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+ QImage naiveConversion;
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+ if (nullptr != image) {
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+ naiveConversion = QImage(image->data, image->width, image->height, QImage::Format_ARGB32);
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+ } else {
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+ qCDebug(SNIPROXY) << "Skip NULL image returned from xcb_image_get() for" << m_windowId << Title();
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+ return QImage();
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+ }
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if (isTransparentImage(naiveConversion)) {
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QImage elaborateConversion = QImage(convertFromNative(image));
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