Bug 414624

Summary: FileSystem::sectorsUsed(): partitionmanager killed by SIGSEGV
Product: [Applications] partitionmanager Reporter: Mattia <mattia.verga>
Component: generalAssignee: Andrius Štikonas <andrius>
Status: RESOLVED DUPLICATE    
Severity: normal CC: kde
Priority: NOR    
Version First Reported In: 4.0.0   
Target Milestone: ---   
Platform: Other   
OS: Linux   
Latest Commit: Version Fixed/Implemented In: 4.2.0
Sentry Crash Report:

Description Mattia 2019-11-28 17:11:02 UTC 
A Fedora user reported a crash while creating a LUKS ext4 partition.

Version-Release number of selected component:
kde-partitionmanager-4.0.0-2.fc31

Additional info:
reporter:       libreport-2.11.3
backtrace_rating: 4
cgroup:         0::/user.slice/user-1000.slice/user@1000.service/gnome-shell-wayland.service
cmdline:        partitionmanager
crash_function: FileSystem::sectorsUsed
executable:     /usr/bin/partitionmanager
journald_cursor: s=72b73fcd08f54901b8af8bfd9f1cc603;i=7acbd;b=be349b3e97fb464aaf595be88aaeb259;m=5955cd21;t=5985c3d576f8a;x=f6d3484cfa751398
kernel:         5.3.12-300.fc31.x86_64
rootdir:        /
runlevel:       N 5
type:           CCpp
uid:            1000

Truncated backtrace:
Thread no. 1 (10 frames)
 #0 FileSystem::sectorsUsed at /usr/include/c++/9/bits/unique_ptr.h:352
 #1 Partition::sectorsUsed at /usr/src/debug/kpmcore-4.0.1-1.fc31.x86_64/src/core/partition.h:187
 #2 Partition::used at /usr/src/debug/kpmcore-4.0.1-1.fc31.x86_64/src/core/partition.h:154
 #3 PartWidget::paintEvent at /usr/src/debug/kpmcore-4.0.1-1.fc31.x86_64/src/gui/partwidget.cpp:96
 #4 QWidget::event at kernel/qwidget.cpp:8965
 #5 QApplicationPrivate::notify_helper at kernel/qapplication.cpp:3700
 #6 QApplication::notify(QObject*, QEvent*) at kernel/qapplication.cpp:3446
 #7 QCoreApplication::notifyInternal2 at kernel/qcoreapplication.cpp:1088
 #8 QWidgetPrivate::sendPaintEvent at kernel/qwidget.cpp:5701
 #9 QWidgetPrivate::drawWidget at kernel/qwidget.cpp:5641

The full backtrace is available at https://bugzilla.redhat.com/show_bug.cgi?id=1777607
Comment 1 Andrius Štikonas 2019-11-28 19:18:10 UTC 
Unfortunately, I don't really know what causes craash in sectorsUsed.

I have seen them myself from time to time and I had some bug reports but I was never able to reproduce them, they were just random crashes.

And I can't see in the source what's wrong with sectorsUsed, there are already checks for non nullptr pointer...
Comment 2 Andrius Štikonas 2020-10-01 22:45:47 UTC 

*** This bug has been marked as a duplicate of bug 413418 ***