Bug 513074

Crashes every time you click on System Settings -> Game Controller

This bug has a precise explanation and an easy fix.

Bug 511859

Application: systemsettings (6.5.3)

ApplicationNotResponding [ANR]: false
Qt Version: 6.10.1
Frameworks Version: 6.20.0
Operating System: Linux 6.17.9-300.fc43.x86_64 x86_64
Windowing System: Wayland
Distribution: "Fedora Linux 43 (Workstation Edition)"
DrKonqi: 6.5.3 [CoredumpBackend]

-- Information about the crash:
(gdb) bt
#0  0x00007ffff4559ddd in __wcslen_avx2 () from /lib64/libc.so.6
>>>> #1  0x00007fff8f4bcfe9 in SDL_wcslen_REAL (string=0x0) at /usr/src/debug/SDL3-3.2.24-1.fc43.x86_64/src/stdlib/SDL_string.c:751 <<<<
#2  SDL_wcsdup_REAL (string=0x0) at /usr/src/debug/SDL3-3.2.24-1.fc43.x86_64/src/stdlib/SDL_string.c:805
#3  0x00007fffb00834cb in SDL_hid_enumerate_REAL (vendor_id=<optimized out>, product_id=<optimized out>)
    at /usr/src/debug/sdl2-compat-2.32.56-2.fc43.x86_64/src/sdl2_compat.c:11742
#4  0x00007fffb00d1f5f in getJoystickHidInfo (vendor=1133, product=-15718, path="/dev/input/event8")
    at /usr/src/debug/plasma-desktop-6.5.2-1.fc43.x86_64/kcms/gamecontroller/device.cpp:90
#5  Device::open (this=0x555556d9e2e0) at /usr/src/debug/plasma-desktop-6.5.2-1.fc43.x86_64/kcms/gamecontroller/device.cpp:160
#6  Device::open (this=0x555556d9e2e0) at /usr/src/debug/plasma-desktop-6.5.2-1.fc43.x86_64/kcms/gamecontroller/device.cpp:148
#7  DeviceModel::addDevice (this=this@entry=0x5555561fa590, deviceIndex=0)
    at /usr/src/debug/plasma-desktop-6.5.2-1.fc43.x86_64/kcms/gamecontroller/devicemodel.cpp:132
#8  0x00007fffb00d3edb in DeviceModel::poll (this=<optimized out>)
    at /usr/src/debug/plasma-desktop-6.5.2-1.fc43.x86_64/kcms/gamecontroller/devicemodel.cpp:93
#9  0x00007ffff4b6855a in void doActivate<false>(QObject*, int, void**) () from /lib64/libQt6Core.so.6
#10 0x00007ffff4b76fd4 in QSingleShotTimer::timerEvent(QTimerEvent*) () from /lib64/libQt6Core.so.6
#11 0x00007ffff4b599d5 in QObject::event(QEvent*) () from /lib64/libQt6Core.so.6
#12 0x00007ffff5e3db1f in QApplicationPrivate::notify_helper(QObject*, QEvent*) () from /lib64/libQt6Widgets.so.6
#13 0x00007ffff4afcaa8 in QCoreApplication::notifyInternal2(QObject*, QEvent*) () from /lib64/libQt6Core.so.6
#14 0x00007ffff4cd1eb8 in QTimerInfoList::activateTimers() () from /lib64/libQt6Core.so.6
#15 0x00007ffff4e20db9 in timerSourceDispatch(_GSource*, int (*)(void*), void*) () from /lib64/libQt6Core.so.6
#16 0x00007ffff3c742a3 in g_main_context_dispatch_unlocked.lto_priv () from /lib64/libglib-2.0.so.0
#17 0x00007ffff3c7d1f8 in g_main_context_iterate_unlocked.isra () from /lib64/libglib-2.0.so.0
#18 0x00007ffff3c7d3a3 in g_main_context_iteration () from /lib64/libglib-2.0.so.0
#19 0x00007ffff4e210ad in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /lib64/libQt6Core.so.6
#20 0x00007ffff4b09603 in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () from /lib64/libQt6Core.so.6
#21 0x00007ffff4b04df9 in QCoreApplication::exec() () from /lib64/libQt6Core.so.6
#22 0x0000555555559735 in main (argc=<optimized out>, argv=<optimized out>) at /usr/src/debug/plasma-systemsettings-6.5.2-1.fc43.x86_64/app/main.cpp:175

(gdb) frame 3
#3  0x00007fffabfbb4cb in SDL_hid_enumerate_REAL (vendor_id=<optimized out>, product_id=<optimized out>)
    at /usr/src/debug/sdl2-compat-2.32.56-2.fc43.x86_64/src/sdl2_compat.c:11742
11742               wchar_t *manufacturer_string = SDL3_wcsdup(i->manufacturer_string);

(gdb) list
11737           SDL_hid_device_info *i;
11738           for (i = list3; i != NULL; i = i->next) {
11739               SDL2_hid_device_info *info = (SDL2_hid_device_info *) SDL3_calloc(1, sizeof (SDL2_hid_device_info));
11740               char *path = SDL3_strdup(i->path);
11741               wchar_t *serial_number = SDL3_wcsdup(i->serial_number);
11742               wchar_t *manufacturer_string = SDL3_wcsdup(i->manufacturer_string);
11743               wchar_t *product_string = SDL3_wcsdup(i->product_string);
11744               if (!info || !path || !serial_number || !manufacturer_string || !product_string) {
11745                   SDL_hid_free_enumeration(retval);
11746                   SDL3_free(info);

(gdb) p i
$1 = (SDL_hid_device_info *) 0x555556871700

(gdb) p *i
$2 = {path = 0x555556301a00 "/dev/hidraw6", vendor_id = 1133, product_id = 49818, serial_number = 0x5555563019e0 L"", release_number = 4903, 
  manufacturer_string = 0x0, product_string = 0x555556c0e8e0 L"Driving Force GT", usage_page = 1, usage = 4, interface_number = 0, interface_class = 0, 
  interface_subclass = 0, interface_protocol = 0, bus_type = SDL_HID_API_BUS_USB, next = 0x0}

(gdb) p i->manufacturer_string 
$4 = 0x0


Under the same conditions, jstest-gtk works fine.


Bus 001 Device 002: ID 046d:c29a Logitech, Inc. Driving Force GT

Device Descriptor:
  bLength                18
  bDescriptorType         1
  bcdUSB               2.00
  bDeviceClass            0 [unknown]
  bDeviceSubClass         0 [unknown]
  bDeviceProtocol         0 
  bMaxPacketSize0        16
  idVendor           0x046d Logitech, Inc.
  idProduct          0xc29a Driving Force GT
  bcdDevice           13.27
  iManufacturer           0 
  iProduct                2 Driving Force GT
  iSerial                 0 
  bNumConfigurations      1

The crash can be reproduced every time.