https://bugs.kde.org/show_bug.cgi?id=404046
Bug ID: 404046
Summary: getTracksInfo() tries to read past end of tracks list
Product: kdenlive
Version: 18.12.1
Platform: Appimage
OS: Linux
Status: REPORTED
Severity: crash
Priority: NOR
Component: User Interface
Assignee: j...@kdenlive.org
Reporter: mazin07+...@gmail.com
Target Milestone: ---
Created attachment 117905
--> https://bugs.kde.org/attachment.cgi?id=117905&action=edit
kdenlive project file that causes kdenlive to crash
SUMMARY
When opening a certain .kdenlive project file, kdenlive crashes in
getTracksInfo() when it tries to get a track for an index that doesn't exist.
Seems to be a mismatch between tracksCount() and the actual number of elements
in m_tracks.
The project file was created by kdenlive 17.12.3 but crash exhibits on 17.12.3
and 18.*. Could be bugginess in kdenlive internal data model that produces bad
project file.
STEPS TO REPRODUCE
1. Open attached kdenlive project file.
2. Observe SIGSEGV in Mlt::Properties::get()
OBSERVED RESULT
Backtrace sample:
#0 0x00007ffff6dcfef0 in Mlt::Properties::get(char const*) () at
/usr/lib/x86_64-linux-gnu/libmlt++.so.3
#1 0x0000555555744dda in Track::info() (this=0x0) at
./src/timeline/track.cpp:604
#2 0x0000555555735760 in Timeline::getTracksInfo() (this=0x55555917daa0) at
./src/timeline/timeline.cpp:710
#3 0x00005555556aad0e in TransitionSettings::updateProjectFormat()
(this=0x5555587c81f0) at ./src/project/transitionsettings.cpp:131
#4 0x00005555559bfec2 in MainWindow::connectDocument() (this=0x555555ec0d40)
at ./src/mainwindow.cpp:1951
EXPECTED RESULT
The file should load properly or, if it is corrupted, an error should be
printed saying what went wrong and the application should exit gracefully.
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