https://bugs.kde.org/show_bug.cgi?id=432182
Bug ID: 432182
Summary: Crash on saving an image > 65.535 (2^16-1) due to
insufficient math ranges
Product: krita
Version: 4.4.2
Platform: Mint (Ubuntu based)
OS: Linux
Status: REPORTED
Severity: crash
Priority: NOR
Component: General
Assignee: krita-bugs-n...@kde.org
Reporter: tamtamy.tym...@gmail.com
Target Milestone: ---
SUMMARY
If you create a file 4.000 x 90.000, you will get a crash while saving.
STEPS TO REPRODUCE
1. Create 4.000 x 90.000 file
2. Try to save.
OBSERVED RESULT
Crash
EXPECTED RESULT
No crash, saved file
EXPLANATION OF THE CRASH:
The crash appears because of insufficient maths in KisFixedPoint.
Krita tries to scale the image down to 256x256 image to make a preview. The
scale ends up being ~0.0027499999999999998. The value gets multiplied 2^8 times
to end up integer since it's KisFixedPoint class, so it's used to get fixed
point arithmetics. But in this case, it's outside of the range:
0.0027499999999999998*(2^8) = ~0.7, which is less than 1, which means the
actual number assigned is 0.
Then of course something inside complains about dividing by 0.
SOFTWARE/OS VERSIONS
Krita
Version: 5.0.0-prealpha (git cffe4e7)
Languages: en_US, en, en_US, en, en_US, en, pl_PL, pl, pl_PL, pl
Hidpi: true
Qt
Version (compiled): 5.11.1
Version (loaded): 5.11.1
OS Information
Build ABI: x86_64-little_endian-lp64
Build CPU: x86_64
CPU: x86_64
Kernel Type: linux
Kernel Version: 5.3.7-050307-generic
Pretty Productname: Linux Mint 19.3
Product Type: linuxmint
Product Version: 19.3
Desktop: X-Cinnamon
ADDITIONAL INFORMATION
Crash log:
---
Thread 70 "Thread (pooled)" received signal SIGFPE, Arithmetic exception.
[Switching to Thread 0x7fffb8ff9700 (LWP 2088)]
0x00007ffff5d3c94a in KisFixedPoint::operator/= (x=..., this=<synthetic
pointer>) at /home/tymon/kritadev/krita/libs/image/kis_fixed_point_maths.h:98
98 d /= x.d;
(gdb) bt
#0 0x00007ffff5d3c94a in KisFixedPoint::operator/=(KisFixedPoint const&)
(x=..., this=<synthetic pointer>) at
/home/tymon/kritadev/krita/libs/image/kis_fixed_point_maths.h:98
#1 0x00007ffff5d3c94a in boost::operators_impl::operator/(KisFixedPoint
const&, KisFixedPoint const&) (rhs=..., lhs=<synthetic pointer>...) at
/usr/include/boost/operators.hpp:262
#2 0x00007ffff5d3c94a in
KisFilterWeightsBuffer::KisFilterWeightsBuffer(KisFilterStrategy*, double)
(this=0x7fffb8ff7f70, filterStrategy=0x555568450800, realScale=<optimized out>)
at /home/tymon/kritadev/krita/libs/image/kis_filter_weights_buffer.h:174
#3 0x00007ffff5d3d0eb in
KisTransformWorker::transformPass<KisSharedPtr<KisHLineIteratorNG>
>(KisPaintDevice*, KisPaintDevice*, double, double, double, KisFilterStrategy*,
int) (this=this@entry=0x7fffb8ff8560, src=0x7fff8c006330, dst=0x7fff8c006330,
floatscale=0.0027499999999999998, shear=0, dx=0, filterStrategy=0x555568450800,
portion=portion@entry=50) at
/usr/include/x86_64-linux-gnu/qt5/QtCore/qglobal.h:581
#4 0x00007ffff5d3be81 in KisTransformWorker::runPartial(QRect const&)
(this=0x7fffb8ff8560, processRect=...) at
/home/tymon/kritadev/krita/libs/image/kis_transform_worker.cc:344
#5 0x00007ffff5d3c6ff in KisTransformWorker::run() (this=0x7fffb8ff8560) at
/home/tymon/kritadev/krita/libs/global/kis_shared_ptr.h:167
#6 0x00007ffff5c3b5f7 in KisImage::convertToQImage(QSize const&,
KoColorProfile const*) (this=<optimized out>, scaledImageSize=..., profile=0x0)
at /home/tymon/kritadev/krita/libs/image/kis_image.cc:1582
#7 0x00007ffff701dc45 in KisDocument::generatePreview(QSize const&)
(this=<optimized out>, size=...) at
/usr/include/x86_64-linux-gnu/qt5/QtCore/qflags.h:120
#8 0x00007fffbb4b1557 in KraConverter::savePreview(KoStore*)
(this=0x7fffb8ff8a60, store=0x7fff8c004400) at
/usr/include/x86_64-linux-gnu/qt5/QtCore/qsize.h:119
#9 0x00007fffbb4b21d8 in KraConverter::saveRootDocuments(KoStore*)
(this=0x7fffb8ff8a60, store=0x7fff8c004400) at
/home/tymon/kritadev/krita/plugins/impex/kra/kra_converter.cpp:225
#10 0x00007fffbb4b261d in KraConverter::buildFile(QIODevice*, QString const&)
(this=0x7fffb8ff8a60, io=<optimized out>, filename=...) at
/home/tymon/kritadev/krita/plugins/impex/kra/kra_converter.cpp:152
#11 0x00007fffbb4aa001 in KraExport::convert(KisDocument*, QIODevice*,
KisPinnedSharedPtr<KisPropertiesConfiguration>) (this=0x55556d421bd0,
document=<optimized out>, io=0x7fffb8ff8b50)
at /home/tymon/kritadev/krita/plugins/impex/kra/kra_export.cpp:49
#12 0x00007ffff702dfde in KisImportExportManager::doExportImpl(QString const&,
QSharedPointer<KisImportExportFilter>,
KisPinnedSharedPtr<KisPropertiesConfiguration>) (this=0x55555fc8e710,
location=..., filter=..., exportConfiguration=...) at
/usr/include/c++/8/bits/atomic_base.h:295
#13 0x00007ffff702e340 in KisImportExportManager::doExport(QString const&,
QSharedPointer<KisImportExportFilter>,
KisPinnedSharedPtr<KisPropertiesConfiguration>, bool) (this=0x55555fc8e710,
location=..., filter=..., exportConfiguration=..., alsoAsKra=<optimized out>)
at /usr/include/c++/8/bits/atomic_base.h:295
#14 0x00007ffff70308af in std::__invoke_impl<KisImportExportErrorCode,
KisImportExportErrorCode (KisImportExportManager::*&)(QString const&,
QSharedPointer<KisImportExportFilter>,
KisPinnedSharedPtr<KisPropertiesConfiguration>, bool),
KisImportExportManager*&, QString&, QSharedPointer<KisImportExportFilter>&,
KisPinnedSharedPtr<KisPropertiesConfiguration>&,
bool&>(std::__invoke_memfun_deref, KisImportExportErrorCode
(KisImportExportManager::*&)(QString const&,
QSharedPointer<KisImportExportFilter>,
KisPinnedSharedPtr<KisPropertiesConfiguration>, bool),
KisImportExportManager*&, QString&, QSharedPointer<KisImportExportFilter>&,
KisPinnedSharedPtr<KisPropertiesConfiguration>&, bool&) (__t=@0x55556f918ec0:
0x55555fc8e710, __f=
@0x55556f918e88: (KisImportExportErrorCode
(KisImportExportManager::*)(KisImportExportManager * const, const QString &,
QSharedPointer<KisImportExportFilter>,
KisPinnedSharedPtr<KisPropertiesConfiguration>, bool)) 0x7ffff702e2c0
<KisImportExportManager::doExport(QString const&,
QSharedPointer<KisImportExportFilter>,
KisPinnedSharedPtr<KisPropertiesConfiguration>, bool)>) at
/usr/include/c++/8/bits/atomic_base.h:295
#15 0x00007ffff70308af in std::__invoke<KisImportExportErrorCode
(KisImportExportManager::*&)(QString const&,
QSharedPointer<KisImportExportFilter>,
KisPinnedSharedPtr<KisPropertiesConfiguration>, bool),
KisImportExportManager*&, QString&, QSharedPointer<KisImportExportFilter>&,
KisPinnedSharedPtr<KisPropertiesConfiguration>&,
bool&>(KisImportExportErrorCode (KisImportExportManager::*&)(QString const&,
QSharedPointer<KisImportExportFilter>,
KisPinnedSharedPtr<KisPropertiesConfiguration>, bool),
KisImportExportManager*&, QString&, QSharedPointer<KisImportExportFilter>&,
KisPinnedSharedPtr<KisPropertiesConfiguration>&, bool&) (__fn=
@0x55556f918e88: (KisImportExportErrorCode
(KisImportExportManager::*)(KisImportExportManager * const, const QString &,
QSharedPointer<KisImportExportFilter>,
KisPinnedSharedPtr<KisPropertiesConfiguration>, bool)) 0x7ffff702e2c0
<KisImportExportManager::doExport(QString const&,
QSharedPointer<KisImportExportFilter>,
KisPinnedSharedPtr<KisPropertiesConfiguration>, bool)>) at
/usr/include/c++/8/bits/invoke.h:96
#16 0x00007ffff70308af in std::_Bind<KisImportExportErrorCode
(KisImportExportManager::*(KisImportExportManager*, QString,
QSharedPointer<KisImportExportFilter>,
KisPinnedSharedPtr<KisPropertiesConfiguration>, bool))(QString const&,
QSharedPointer<KisImportExportFilter>,
KisPinnedSharedPtr<KisPropertiesConfiguration>,
bool)>::__call<KisImportExportErrorCode, , 0ul, 1ul, 2ul, 3ul,
4ul>(std::tuple<>&&, std::_Index_tuple<0ul, 1ul, 2ul, 3ul, 4ul>) (__args=...,
this=0x55556f918e88) at /usr/include/c++/8/functional:402
#17 0x00007ffff70308af in std::_Bind<KisImportExportErrorCode
(KisImportExportManager::*(KisImportExportManager*, QString,
QSharedPointer<KisImportExportFilter>,
KisPinnedSharedPtr<KisPropertiesConfiguration>, bool))(QString const&,
QSharedPointer<KisImportExportFilter>,
KisPinnedSharedPtr<KisPropertiesConfiguration>, bool)>::operator()<,
KisImportExportErrorCode>() (this=0x55556f918e88) at
/usr/include/c++/8/functional:484
#18 0x00007ffff70308af in
QtConcurrent::StoredFunctorCall0<KisImportExportErrorCode,
std::_Bind<KisImportExportErrorCode
(KisImportExportManager::*(KisImportExportManager*, QString,
QSharedPointer<KisImportExportFilter>,
KisPinnedSharedPtr<KisPropertiesConfiguration>, bool))(QString const&,
QSharedPointer<KisImportExportFilter>,
KisPinnedSharedPtr<KisPropertiesConfiguration>, bool)> >::runFunctor()
(this=0x55556f918e40)
at
/usr/include/x86_64-linux-gnu/qt5/QtConcurrent/qtconcurrentstoredfunctioncall.h:60
#19 0x00007ffff70308af in
QtConcurrent::RunFunctionTask<KisImportExportErrorCode>::run()
(this=0x55556f918e40) at
/usr/include/x86_64-linux-gnu/qt5/QtConcurrent/qtconcurrentrunbase.h:108
#20 0x00007ffff45f7f71 in () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#21 0x00007ffff45ffc87 in () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#22 0x00007ffff19a7182 in start_thread (arg=<optimized out>) at
pthread_create.c:486
#23 0x00007ffff3eceb1f in clone () at
../sysdeps/unix/sysv/linux/x86_64/clone.S:95
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