https://bugs.kde.org/show_bug.cgi?id=515904
Bug ID: 515904
Summary: Kaidan 0.15.0 (Flatpak) crashes when receiving an
incoming contact request (<presence
type="subscribe"/>) from another XMPP client.
Classification: Applications
Product: kaidan
Version First unspecified
Reported In:
Platform: Mint (Ubuntu based)
OS: Linux
Status: REPORTED
Severity: crash
Priority: NOR
Component: general
Assignee: [email protected]
Reporter: [email protected]
Target Milestone: ---
Steps to reproduce:
Create account on Kaidan (e.g. [email protected])
>From a different client (e.g. Dinox), add [email protected] as contact
Kaidan crashes immediately
Note: Sending contact requests from Kaidan to Dinox works fine. The crash only
happens on incoming requests.
Probable cause:
In src/OmemoController.cpp, function initializeChat():
if (RosterModel::instance()->item(m_accountSettings->jid(),
jid)->isReceivingPresence()) {
RosterModel::instance()->item(...) returns std::optional<RosterItem>.
When an incoming subscription request is received,
RosterController::handleSubscriptionRequest() calls
processSubscriptionRequestFromStranger() which calls addContact() — but this is
asynchronous (roster IQ set + server response). Before the roster item exists,
Kaidan appears to open the chat view, which triggers initializeChat(). At this
point, item() returns std::nullopt, and dereferencing it with
->isReceivingPresence() causes undefined behavior / segfault.
Side effect: After the crash, Kaidan's OMEMO database appears to be corrupted —
after restart, OMEMO encryption no longer works for any contact (not just the
one that triggered the crash). Only unencrypted messages can be sent.
Otherwise, Omemo 2 works wonderfully between Kaidan and Dinox.
Environment:
Kaidan 0.15.0 (Flatpak, im.kaidan.kaidan)
Linux (Flatpak system install)
ejabberd server 26.1
Ralf Peter
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