Bug 499470

Summary:	Sudden KMail crush after attempt of opening meeting invitation.
Product:	[Applications] kmail2	Reporter:	gohandi+kde
Component:	general	Assignee:	kdepim bugs <kdepim-bugs>
Status:	VERIFIED FIXED
Severity:	crash	CC:	winter
Priority:	NOR	Keywords:	drkonqi
Version First Reported In:	unspecified
Target Milestone:	---
Platform:	Fedora RPMs
OS:	Linux
Latest Commit:	https://invent.kde.org/frameworks/kcalendarcore/-/commit/c8dcc031afdd2b60ad56d752b31361331c12bb23	Version Fixed In:	6.12.0
Sentry Crash Report:	https://crash-reports.kde.org/organizations/kde/issues/127709/events/8a486ee3a51548919b3164804147cdf7/
Attachments:	New crash information added by DrKonqi Email that crush KMail Kcrush report after attempt of opning saved invitation.

Description gohandi+kde 2025-02-03 17:07:44 UTC

Application: kmail (6.3.1 (24.12.1))

ApplicationNotResponding [ANR]: false
Qt Version: 6.8.1
Frameworks Version: 6.10.0
Operating System: Linux 6.12.11-200.fc41.x86_64 x86_64
Windowing System: Wayland
Distribution: "Fedora Linux 41 (KDE Plasma)"
DrKonqi: 6.2.5 [CoredumpBackend]

-- Information about the crash:
1. Open KMail. 
2. Click on affected Meeting invitation
3. Wait <2s, program crushes mail is not shown even for moment.
--
Invitation is send by Outlook client from windows machine. This dailyt meeting with multiple attendees and link to webex as location.
KMail barrely configured only: SMTP connection, IMAP Connection, LDAPv3 host.
KOrganizer is almost empty due to fact it is fresh install.
Other invitations open properly, also generated from outlook.

The crash can be reproduced every time.

-- Backtrace (Reduced):
#5  QHashPrivate::iterator<QHashPrivate::Node<QDateTime, KCalendarCore::Period> >::node (this=<synthetic pointer>) at /usr/include/qt6/QtCore/qhash.h:788
#6  QHash<QDateTime, KCalendarCore::Period>::iterator::operator-> (this=<synthetic pointer>) at /usr/include/qt6/QtCore/qhash.h:1140
#7  KCalendarCore::Recurrence::shiftTimes (this=0x55d110c6eae0, oldTz=..., newTz=...) at /usr/src/debug/kf6-kcalendarcore-6.10.0-1.fc41.x86_64/src/recurrence.cpp:516
#8  0x00007f3ddc8c763f in KCalendarCore::Incidence::shiftTimes (this=0x55d110c000f0, oldZone=..., newZone=...) at /usr/src/debug/kf6-kcalendarcore-6.10.0-1.fc41.x86_64/src/incidence.cpp:372
#9  0x00007f3ddc8a7c74 in KCalendarCore::Event::shiftTimes (this=0x55d110c000f0, oldZone=..., newZone=...) at /usr/src/debug/kf6-kcalendarcore-6.10.0-1.fc41.x86_64/src/event.cpp:226


Reported using DrKonqi

Comment 1 gohandi+kde 2025-02-03 17:07:45 UTC

Created attachment 177932 [details]
New crash information added by DrKonqi

DrKonqi auto-attaching complete backtrace.

Comment 2 Allen Winter 2025-02-03 17:46:30 UTC

any chance you can attach the offending invitation as an .ics file here?
or email it to me

Comment 3 gohandi+kde 2025-02-04 11:35:50 UTC

Created attachment 177946 [details]
Email that crush KMail

I have exported this message by round cube and perform some anonimization by hand.
After anonimization i check on thunderbird and program displays content of email. When try to display it in KMail it crushes.

Comment 4 gohandi+kde 2025-02-04 11:46:25 UTC

Created attachment 177951 [details]
Kcrush report after attempt of opning saved invitation.

Added Kcrush report after attempt of opening saved invitation.

Comment 5 Allen Winter 2025-02-10 13:12:03 UTC

I'm able to get a crash by emailing your attachment as an iCalendar to myself.

let's see if I can make a fix

Comment 6 Bug Janitor Service 2025-02-10 15:14:10 UTC

A possibly relevant merge request was started @ https://invent.kde.org/frameworks/kcalendarcore/-/merge_requests/188

Comment 7 Bug Janitor Service 2025-02-10 15:18:09 UTC

A possibly relevant merge request was started @ https://invent.kde.org/frameworks/kcalendarcore/-/merge_requests/189

Comment 8 Allen Winter 2025-02-10 16:20:40 UTC

Git commit c8dcc031afdd2b60ad56d752b31361331c12bb23 by Allen Winter.
Committed on 10/02/2025 at 15:10.
Pushed by cullmann into branch 'master'.

recurrence.cpp - shiftTimes() prevent crash on missing or invalid period

In shiftTimes(), don't crash if unable to locate an rDateTime in
the rDateTimePeriods hash (eg if that hash is empty).
FIXED-IN: 6.12.0

M  +7    -5    src/recurrence.cpp

https://invent.kde.org/frameworks/kcalendarcore/-/commit/c8dcc031afdd2b60ad56d752b31361331c12bb23

Comment 9 gohandi+kde 2025-03-15 18:48:53 UTC

After update KDE framework to 6.12 i can confirm that affected invitation opens properly without crushing kmail.
Thanks for support!