[Digikam-devel] [digikam] [Bug 339751] large tif files crash thumbnail generator (out of memory / sig11)

[Peter Gervai]

https://bugs.kde.org/show_bug.cgi?id=339751

--- Comment #5 from Peter Gervai <grin at grin.hu> ---
(In reply to Gilles Caulier from comment #3)
> Run digiKam into GDB as explained here  :
> 
> https://www.digikam.org/contrib
> 
> And report the crash trace...

Crash trace was pretty useless. It kept being pretty useless with exiv2 and
kexiv2 debug symbols, and I couldn't conjure digikam debug symbols since, as I
have mentioned, I don't have the means right now. (lib debug took 50 minutes to
retrieve. go figure.)

Basically it died in libkexiv2's thumbnail code, maybe it's the culprit, now
that I started to think about it.

> Note : I use also Hugin to make big panorama (200/300Mb TIFF), and there is
> no crash here to render thumbnails, preview and load image in editor.

I know, me too. 


But look what I found: the straces from yesterday. And they SIGSEGV'd on a
different file (this bug was originally reproduced by not SIGSEGV but the mem
allocation error, but they were oscillating a day before, probably depending on
the selected albums of the collection). And now I went there and checked the
file. Bang, sigsegv. Here's a trace which is _very_ similar to the one with the
mem problem above:

#0  0x00007fffedd396e5 in Exiv2::PreviewManager::getPreviewImage
(this=0x7fff7803c390, properties=...) at preview.cpp:1157
#1  0x00007ffff5c12902 in KExiv2Iface::KExiv2Previews::data
(this=0x7fff837fd710, index=0) at ../../libkexiv2/kexiv2previews.cpp:170
#2  0x00007ffff5c12a8b in KExiv2Iface::KExiv2Previews::image (this=<optimized
out>, index=<optimized out>) at ../../libkexiv2/kexiv2previews.cpp:187
#3  0x00007ffff551807b in
Digikam::ThumbnailCreator::createThumbnail(Digikam::ThumbnailInfo const&, QRect
const&) const () from /usr/lib/digikam/libdigikamcore.so.4.3.0
#4  0x00007ffff551bcf9 in Digikam::ThumbnailCreator::load(QString const&, QRect
const&, bool) const () from /usr/lib/digikam/libdigikamcore.so.4.3.0
#5  0x00007ffff551cbe2 in Digikam::ThumbnailCreator::load(QString const&) const
() from /usr/lib/digikam/libdigikamcore.so.4.3.0
#6  0x00007ffff552b31f in ?? () from /usr/lib/digikam/libdigikamcore.so.4.3.0
#7  0x00007ffff5500b8e in Digikam::LoadSaveThread::run() () from
/usr/lib/digikam/libdigikamcore.so.4.3.0
#8  0x00007ffff55352ee in Digikam::DynamicThread::DynamicThreadPriv::run() ()
from /usr/lib/digikam/libdigikamcore.so.4.3.0
#9  0x00007ffff1c528a4 in ?? () from /usr/lib/x86_64-linux-gnu/libQtCore.so.4
#10 0x00007ffff1c5f3ff in ?? () from /usr/lib/x86_64-linux-gnu/libQtCore.so.4
#11 0x00007fffecb370a4 in start_thread () from
/lib/x86_64-linux-gnu/libpthread.so.0
#12 0x00007ffff0e80c2d in clone () from /lib/x86_64-linux-gnu/libc.so.6

The image is pretty large so it's available here:
http://vilya.grin.hu/t/digikrash01.png I believe this is the one but it's not
easy to tell since digikam crashes when entering the collection.

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