https://bugs.kde.org/show_bug.cgi?id=456666
Bug ID: 456666
Summary: KTorrent crashes with "mmap failed : Cannot allocate
memory" even with plenty of free memory
Product: ktorrent
Version: 21.12.3
Platform: Kubuntu Packages
OS: Linux
Status: REPORTED
Severity: normal
Priority: NOR
Component: general
Assignee: joris.guis...@gmail.com
Reporter: kdeb1...@tebibyte.org
Target Milestone: ---
SUMMARY
Ktorrent does not start, instead crashing out with "mmap failed : Cannot
allocate memory" despite there being plenty of memory. Rebooting the computer
does not help, ktorrent still won't run.
chris@xavier 08:13:04 ~ $ free -h
total used free shared buff/cache
available
Mem: 125Gi 4.2Gi 114Gi 56Mi 6.4Gi
120Gi
Swap: 256Gi 0B 256Gi
STEPS TO REPRODUCE
1. Boot the computer
2. Log in (KDE/Plasma)
3. Choose KTorrent from the "Internet" menu
4. "Nothing happens"
5. Open Konsole
6. Enter "ktorrent --verbose"
7. Output as below...
OBSERVED RESULT
chris@xavier 08:12:58 ~ $ ktorrent --verbose
Wed Jul 13 08:13:02 2022: Bound to ::
Wed Jul 13 08:13:02 2022: UTP: bound to ::
Wed Jul 13 08:13:02 2022: Bound to 0.0.0.0
Wed Jul 13 08:13:02 2022: UTP: bound to 0.0.0.0
Wed Jul 13 08:13:02 2022: Bound to UDP port 6881
Wed Jul 13 08:13:02 2022: Bound to ::
Wed Jul 13 08:13:02 2022: Cannot bind to port 0.0.0.0:6881 : Address already in
use
Wed Jul 13 08:13:02 2022: Bound to TCP port 6881
Wed Jul 13 08:13:02 2022: DHT: Starting on port 7881
Wed Jul 13 08:13:02 2022: Bound to ::
Wed Jul 13 08:13:02 2022: DHT: Bound to ::
Wed Jul 13 08:13:02 2022: Bound to 0.0.0.0
Wed Jul 13 08:13:02 2022: DHT: Bound to 0.0.0.0
Wed Jul 13 08:13:02 2022: DHT: finding node
Wed Jul 13 08:13:02 2022: Cannot open /home/chris/.local/share/ktorrent/groups
: No such file or directory
Wed Jul 13 08:13:02 2022: Loading /home/chris/.local/share/ktorrent/tor0/
Wed Jul 13 08:13:02 2022: Loading /home/chris/.local/share/ktorrent/tor1/
Wed Jul 13 08:13:02 2022: Loading /home/chris/.local/share/ktorrent/tor10/
Wed Jul 13 08:13:02 2022: Encoding : UTF-8
Wed Jul 13 08:13:02 2022: Bound to ::
Wed Jul 13 08:13:02 2022: Bound to 0.0.0.0
Wed Jul 13 08:13:02 2022: Loading /home/chris/.local/share/ktorrent/tor11/
Wed Jul 13 08:13:02 2022: Loading /home/chris/.local/share/ktorrent/tor12/
Wed Jul 13 08:13:02 2022: Loading /home/chris/.local/share/ktorrent/tor13/
Wed Jul 13 08:13:02 2022: Loading /home/chris/.local/share/ktorrent/tor14/
Wed Jul 13 08:13:02 2022: Loading /home/chris/.local/share/ktorrent/tor15/
Wed Jul 13 08:13:02 2022: Loading /home/chris/.local/share/ktorrent/tor16/
Wed Jul 13 08:13:02 2022: Loading /home/chris/.local/share/ktorrent/tor17/
Wed Jul 13 08:13:02 2022: Loading /home/chris/.local/share/ktorrent/tor18/
Wed Jul 13 08:13:02 2022: Encoding : UTF-8
Wed Jul 13 08:13:02 2022: Loading /home/chris/.local/share/ktorrent/tor19/
Wed Jul 13 08:13:02 2022: Loading /home/chris/.local/share/ktorrent/tor2/
Wed Jul 13 08:13:04 2022: mmap failed : Cannot allocate memory
Wed Jul 13 08:13:04 2022: mmap failed : Cannot allocate memory
Wed Jul 13 08:13:04 2022: mmap failed : Cannot allocate memory
Wed Jul 13 08:13:04 2022: Uncaught exception: std::bad_alloc
Wed Jul 13 08:13:04 2022: DHT: Stopping
EXPECTED RESULT
Ktorrent should run
SOFTWARE/OS VERSIONS
Linux/KDE Plasma: KUbuntu 22.04 LTS
KDE Plasma Version: 5.24.4
KDE Frameworks Version: 5.92.0
Qt Version: 5.13.3
ADDITIONAL INFORMATION
This is on a relatively clean install of Kubuntu 22.04 (the current LTS
release) although with the preexisting /home
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