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Message #86928
[Bug 1469611] Re: QQuickPixmapReader::asyncResponseFinished segfaults if a QQuickAsyncImageProvider returns an error response
Fixed by https://codereview.qt-project.org/#/c/115522/
Let's wait for upstream before distro-patching i guess
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https://bugs.launchpad.net/bugs/1469611
Title:
QQuickPixmapReader::asyncResponseFinished segfaults if a
QQuickAsyncImageProvider returns an error response
Status in qtdeclarative-opensource-src package in Ubuntu:
New
Bug description:
While working on the new thumbnailer, we've been using the new
QQuickAsyncImageProvider API. The API allows us to report errors by
overriding the errorString() method on QQuickImageResponse to return a
non-empty string. However, if I do so the application crashes.
Loading up the symbols to get a stack trace shows this to be a bug in
the logic of QQuickPixmapReader::asyncResponseFinished:
QQuickTextureFactory *t = 0;
QQuickPixmapReply::ReadError error = QQuickPixmapReply::NoError;
QString errorString;
QSize readSize;
if (!response->errorString().isEmpty()) {
error = QQuickPixmapReply::Loading;
errorString = response->errorString();
} else {
t = response->textureFactory();
}
mutex.lock();
if (!cancelled.contains(job))
job->postReply(error, errorString, t->textureSize(), t);
mutex.unlock();
If errorString() is not empty, then t will still be NULL. It is then
dereferenced to call t->textureSize() resulting in a segfault.
ProblemType: Bug
DistroRelease: Ubuntu 15.10
Package: libqt5quick5 5.4.2-1ubuntu1
ProcVersionSignature: Ubuntu 3.19.0-20.20-generic 3.19.8
Uname: Linux 3.19.0-20-generic x86_64
ApportVersion: 2.17.3-0ubuntu4
Architecture: amd64
CurrentDesktop: Unity
Date: Mon Jun 29 14:53:49 2015
InstallationDate: Installed on 2013-10-29 (607 days ago)
InstallationMedia: Ubuntu 13.10 "Saucy Salamander" - Release amd64 (20131016.1)
SourcePackage: qtdeclarative-opensource-src
UpgradeStatus: Upgraded to wily on 2015-06-13 (15 days ago)
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References