https://bugs.kde.org/show_bug.cgi?id=413767
Bug ID: 413767
Summary: libktorrent isn't a thread-safe
Product: ktorrent
Version: 5.1
Platform: Kubuntu Packages
OS: Linux
Status: REPORTED
Severity: normal
Priority: NOR
Component: general
Assignee: joris.guis...@gmail.com
Reporter: trufano...@gmail.com
Target Milestone: ---
The libktorrent runs UTPServer instance in a separate thread. Its
`UTPServer::changePort(bt::Uint16 p)` may be called from another thread (main
thread of KTorrent app) if someone will try to change a port setting in
Settings/Network/Port.
Previously this resulted in a warning but since Kubuntu 18.04 based on Qt 5.9.5
it causes a crash of the app with
`Thread 5 "utp::UTPServerT" received signal SIGSEGV, Segmentation fault.`
I've pushed a workaround to KTorrent project (just restarting UTPServer with a
new port instead of changing a port in current instance):
https://phabricator.kde.org/D13045
More tech details available in the review above.
Still we agreed to leave this bug here to not forget about this thread-safety
problem in libktorrent.
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