[plasma/plasma-desktop] kcms/gamecontroller: kcms/gamecontroller: Fix std::out_of_range exception

Git commit 932f29636ccd264005cb1af579c0c1a11976cbf7 by Sebastian Sauer.
Committed on 20/07/2026 at 04:29.
Pushed by meven into branch 'master'.

kcms/gamecontroller: Fix std::out_of_range exception

If either slash==std::string::npos or devicePath.empty() then
the code can throw a std::out_of_range exception. Fix that
and make sure the code not throws a std::out_of_range exception.

Based on a patch done by Adam Doda.

BUG: 522886

M  +1    -1    kcms/gamecontroller/udevmatcher.cpp

https://invent.kde.org/plasma/plasma-desktop/-/commit/932f29636ccd264005cb1af579c0c1a11976cbf7

diff --git a/kcms/gamecontroller/udevmatcher.cpp b/kcms/gamecontroller/udevmatcher.cpp
index 08d4606db3..45ed73e541 100644
--- a/kcms/gamecontroller/udevmatcher.cpp
+++ b/kcms/gamecontroller/udevmatcher.cpp
@@ -55,7 +55,7 @@ std::string UDevMatcher::deviceToUdevId(const std::string &device_path)
     qCDebug(KCM_GAMECONTROLLER) << "Looking for ID of " << devicePath;
 
     // If the bit after the last / is a digit, stop, we found it
-    while (!std::isdigit(devicePath.at(slash + 1))) {
+    while (slash != std::string::npos && (slash + 1) < devicePath.length() && !std::isdigit(devicePath.at(slash + 1))) {
         // Remove the last bit
         devicePath = devicePath.substr(0, slash);