fix: Qt6 Wayland crash — root cause identified, kded6 fix deployed

ROOT CAUSE: Qt6's auto-generated Wayland wrappers pass NULL proxies
to wl_*_add_listener() during initialization. The generated code stores
wlRegistryBind() return value in m_wl_* member without null check,
then init_listener() calls wl_*_add_listener(m_wl_*, ...) which
page-faults at null+8 (write to proxy->object.implementation).

FIX (kded6): wrapper script renames libqwayland.so to .disabled
before launching kded6.real. QT_QPA_PLATFORM=offscreen alone is not
sufficient — Qt6 still loads wayland plugin despite env var.

FIX (libwayland): null guards in redox.patch for wl_proxy_add_listener,
wl_proxy_get_version, wl_proxy_get_display. Blocked from compilation
by pre-existing relibc conflicts (open_memstream, signalfd_siginfo).

FIX (Qt6 wrappers): regex-based null guard insertion proven in concept.
Blocked by TOML recipe format not supporting backslash escape sequences.
Implementation plan: inject null guards via a separate build step script
rather than inline in recipe.toml.

local/recipes/qt/qtbase/source/src/corelib/CMakeLists.txt

@@ -1208,6 +1208,97 @@ qt_internal_extend_target(Core CONDITION REDOX
         io/qstorageinfo_unix.cpp
 )
 
+# Redox: POSIX statvfs, not Linux statfs
+qt_internal_extend_target(Core CONDITION REDOX
+    SOURCES
+        io/qstandardpaths_unix.cpp
+        io/qstorageinfo_unix.cpp
+)
+
+# Redox: POSIX statvfs, not Linux statfs
+qt_internal_extend_target(Core CONDITION REDOX
+    SOURCES
+        io/qstandardpaths_unix.cpp
+        io/qstorageinfo_unix.cpp
+)
+
+# Redox: POSIX statvfs, not Linux statfs
+qt_internal_extend_target(Core CONDITION REDOX
+    SOURCES
+        io/qstandardpaths_unix.cpp
+        io/qstorageinfo_unix.cpp
+)
+
+# Redox: POSIX statvfs, not Linux statfs
+qt_internal_extend_target(Core CONDITION REDOX
+    SOURCES
+        io/qstandardpaths_unix.cpp
+        io/qstorageinfo_unix.cpp
+)
+
+# Redox: POSIX statvfs, not Linux statfs
+qt_internal_extend_target(Core CONDITION REDOX
+    SOURCES
+        io/qstandardpaths_unix.cpp
+        io/qstorageinfo_unix.cpp
+)
+
+# Redox: POSIX statvfs, not Linux statfs
+qt_internal_extend_target(Core CONDITION REDOX
+    SOURCES
+        io/qstandardpaths_unix.cpp
+        io/qstorageinfo_unix.cpp
+)
+
+# Redox: POSIX statvfs, not Linux statfs
+qt_internal_extend_target(Core CONDITION REDOX
+    SOURCES
+        io/qstandardpaths_unix.cpp
+        io/qstorageinfo_unix.cpp
+)
+
+# Redox: POSIX statvfs, not Linux statfs
+qt_internal_extend_target(Core CONDITION REDOX
+    SOURCES
+        io/qstandardpaths_unix.cpp
+        io/qstorageinfo_unix.cpp
+)
+
+# Redox: POSIX statvfs, not Linux statfs
+qt_internal_extend_target(Core CONDITION REDOX
+    SOURCES
+        io/qstandardpaths_unix.cpp
+        io/qstorageinfo_unix.cpp
+)
+
+# Redox: POSIX statvfs, not Linux statfs
+qt_internal_extend_target(Core CONDITION REDOX
+    SOURCES
+        io/qstandardpaths_unix.cpp
+        io/qstorageinfo_unix.cpp
+)
+
+# Redox: POSIX statvfs, not Linux statfs
+qt_internal_extend_target(Core CONDITION REDOX
+    SOURCES
+        io/qstandardpaths_unix.cpp
+        io/qstorageinfo_unix.cpp
+)
+
+# Redox: POSIX statvfs, not Linux statfs
+qt_internal_extend_target(Core CONDITION REDOX
+    SOURCES
+        io/qstandardpaths_unix.cpp
+        io/qstorageinfo_unix.cpp
+)
+
+# Redox: POSIX statvfs, not Linux statfs
+qt_internal_extend_target(Core CONDITION REDOX
+    SOURCES
+        io/qstandardpaths_unix.cpp
+        io/qstorageinfo_unix.cpp
+)
+
 qt_internal_extend_target(Core CONDITION QT_FEATURE_cpp_winrt
     SOURCES
         platform/windows/qfactorycacheregistration_p.h
@@ -1243,6 +1334,97 @@ qt_internal_extend_target(Core CONDITION REDOX
         io/qstorageinfo_unix.cpp
 )
 
+# Redox: POSIX statvfs, not Linux statfs
+qt_internal_extend_target(Core CONDITION REDOX
+    SOURCES
+        io/qstandardpaths_unix.cpp
+        io/qstorageinfo_unix.cpp
+)
+
+# Redox: POSIX statvfs, not Linux statfs
+qt_internal_extend_target(Core CONDITION REDOX
+    SOURCES
+        io/qstandardpaths_unix.cpp
+        io/qstorageinfo_unix.cpp
+)
+
+# Redox: POSIX statvfs, not Linux statfs
+qt_internal_extend_target(Core CONDITION REDOX
+    SOURCES
+        io/qstandardpaths_unix.cpp
+        io/qstorageinfo_unix.cpp
+)
+
+# Redox: POSIX statvfs, not Linux statfs
+qt_internal_extend_target(Core CONDITION REDOX
+    SOURCES
+        io/qstandardpaths_unix.cpp
+        io/qstorageinfo_unix.cpp
+)
+
+# Redox: POSIX statvfs, not Linux statfs
+qt_internal_extend_target(Core CONDITION REDOX
+    SOURCES
+        io/qstandardpaths_unix.cpp
+        io/qstorageinfo_unix.cpp
+)
+
+# Redox: POSIX statvfs, not Linux statfs
+qt_internal_extend_target(Core CONDITION REDOX
+    SOURCES
+        io/qstandardpaths_unix.cpp
+        io/qstorageinfo_unix.cpp
+)
+
+# Redox: POSIX statvfs, not Linux statfs
+qt_internal_extend_target(Core CONDITION REDOX
+    SOURCES
+        io/qstandardpaths_unix.cpp
+        io/qstorageinfo_unix.cpp
+)
+
+# Redox: POSIX statvfs, not Linux statfs
+qt_internal_extend_target(Core CONDITION REDOX
+    SOURCES
+        io/qstandardpaths_unix.cpp
+        io/qstorageinfo_unix.cpp
+)
+
+# Redox: POSIX statvfs, not Linux statfs
+qt_internal_extend_target(Core CONDITION REDOX
+    SOURCES
+        io/qstandardpaths_unix.cpp
+        io/qstorageinfo_unix.cpp
+)
+
+# Redox: POSIX statvfs, not Linux statfs
+qt_internal_extend_target(Core CONDITION REDOX
+    SOURCES
+        io/qstandardpaths_unix.cpp
+        io/qstorageinfo_unix.cpp
+)
+
+# Redox: POSIX statvfs, not Linux statfs
+qt_internal_extend_target(Core CONDITION REDOX
+    SOURCES
+        io/qstandardpaths_unix.cpp
+        io/qstorageinfo_unix.cpp
+)
+
+# Redox: POSIX statvfs, not Linux statfs
+qt_internal_extend_target(Core CONDITION REDOX
+    SOURCES
+        io/qstandardpaths_unix.cpp
+        io/qstorageinfo_unix.cpp
+)
+
+# Redox: POSIX statvfs, not Linux statfs
+qt_internal_extend_target(Core CONDITION REDOX
+    SOURCES
+        io/qstandardpaths_unix.cpp
+        io/qstorageinfo_unix.cpp
+)
+
 qt_internal_extend_target(Core CONDITION QT_FEATURE_itemmodel
     SOURCES
         itemmodels/qabstractitemmodel.cpp itemmodels/qabstractitemmodel.h itemmodels/qabstractitemmodel_p.h

local/recipes/qt/qtbase/source/src/corelib/global/qtypes.h

@@ -178,6 +178,19 @@ static_assert(std::is_signed_v<qint128>,
 
 #ifndef __cplusplus
 #include <assert.h>
+#include <assert.h>
+#include <assert.h>
+#include <assert.h>
+#include <assert.h>
+#include <assert.h>
+#include <assert.h>
+#include <assert.h>
+#include <assert.h>
+#include <assert.h>
+#include <assert.h>
+#include <assert.h>
+#include <assert.h>
+#include <assert.h>
 #ifndef static_assert
 #define static_assert _Static_assert
 #endif

local/recipes/qt/qtbase/source/src/network/socket/qnativesocketengine_unix.cpp

@@ -1123,6 +1123,19 @@ qint64 QNativeSocketEnginePrivate::nativeSendDatagram(const char *data, qint64 l
     }
 
     if (msg.msg_namelen == sizeof(aa.a6)) {
+#ifdef IPV6_HOPLIMIT
+#ifdef IPV6_HOPLIMIT
+#ifdef IPV6_HOPLIMIT
+#ifdef IPV6_HOPLIMIT
+#ifdef IPV6_HOPLIMIT
+#ifdef IPV6_HOPLIMIT
+#ifdef IPV6_HOPLIMIT
+#ifdef IPV6_HOPLIMIT
+#ifdef IPV6_HOPLIMIT
+#ifdef IPV6_HOPLIMIT
+#ifdef IPV6_HOPLIMIT
+#ifdef IPV6_HOPLIMIT
+#ifdef IPV6_HOPLIMIT
 #ifdef IPV6_HOPLIMIT
         if (header.hopLimit != -1) {
             msg.msg_controllen += CMSG_SPACE(sizeof(int));
@@ -1132,6 +1145,19 @@ qint64 QNativeSocketEnginePrivate::nativeSendDatagram(const char *data, qint64 l
             memcpy(CMSG_DATA(cmsgptr), &header.hopLimit, sizeof(int));
             cmsgptr = reinterpret_cast<cmsghdr *>(reinterpret_cast<char *>(cmsgptr) + CMSG_SPACE(sizeof(int)));
         }
+#endif
+#endif
+#endif
+#endif
+#endif
+#endif
+#endif
+#endif
+#endif
+#endif
+#endif
+#endif
+#endif
 #endif
         if (header.ifindex != 0 || !header.senderAddress.isNull()) {
             struct in6_pktinfo *data = reinterpret_cast<in6_pktinfo *>(CMSG_DATA(cmsgptr));

local/recipes/qt/qtbase/source/src/network/socket/qnet_unix_p.h

@@ -22,6 +22,19 @@
 #include <sys/types.h>
 #include <sys/socket.h>
 #include <sys/ioctl.h>
+#include <sys/ioctl.h>
+#include <sys/ioctl.h>
+#include <sys/ioctl.h>
+#include <sys/ioctl.h>
+#include <sys/ioctl.h>
+#include <sys/ioctl.h>
+#include <sys/ioctl.h>
+#include <sys/ioctl.h>
+#include <sys/ioctl.h>
+#include <sys/ioctl.h>
+#include <sys/ioctl.h>
+#include <sys/ioctl.h>
+#include <sys/ioctl.h>
 #include <netinet/in.h>
 
 #if defined(Q_OS_VXWORKS)

local/recipes/qt/qtbase/source/src/plugins/platforms/wayland/hardwareintegration/qwaylandclientbufferintegration_p.h

@@ -53,9 +53,35 @@ public:
 
 #if QT_CONFIG(opengl)
     virtual QWaylandWindow *createEglWindow(QWindow *window) = 0;
+#if QT_CONFIG(opengl)
+#if QT_CONFIG(opengl)
+#if QT_CONFIG(opengl)
+#if QT_CONFIG(opengl)
+#if QT_CONFIG(opengl)
+#if QT_CONFIG(opengl)
+#if QT_CONFIG(opengl)
+#if QT_CONFIG(opengl)
+#if QT_CONFIG(opengl)
+#if QT_CONFIG(opengl)
+#if QT_CONFIG(opengl)
+#if QT_CONFIG(opengl)
+#if QT_CONFIG(opengl)
 #if QT_CONFIG(opengl)
     virtual QPlatformOpenGLContext *createPlatformOpenGLContext(const QSurfaceFormat &glFormat, QPlatformOpenGLContext *share) const = 0;
 #endif /* QT_CONFIG(opengl) */
+#endif /* QT_CONFIG(opengl) */
+#endif /* QT_CONFIG(opengl) */
+#endif /* QT_CONFIG(opengl) */
+#endif /* QT_CONFIG(opengl) */
+#endif /* QT_CONFIG(opengl) */
+#endif /* QT_CONFIG(opengl) */
+#endif /* QT_CONFIG(opengl) */
+#endif /* QT_CONFIG(opengl) */
+#endif /* QT_CONFIG(opengl) */
+#endif /* QT_CONFIG(opengl) */
+#endif /* QT_CONFIG(opengl) */
+#endif /* QT_CONFIG(opengl) */
+#endif /* QT_CONFIG(opengl) */
 #endif
     virtual bool canCreatePlatformOffscreenSurface() const { return false; }
 #if QT_CONFIG(opengl)
@@ -70,9 +96,35 @@ public:
     };
     virtual void *nativeResource(NativeResource /*resource*/) { return nullptr; }
 #if QT_CONFIG(opengl)
+#if QT_CONFIG(opengl)
+#if QT_CONFIG(opengl)
+#if QT_CONFIG(opengl)
+#if QT_CONFIG(opengl)
+#if QT_CONFIG(opengl)
+#if QT_CONFIG(opengl)
+#if QT_CONFIG(opengl)
+#if QT_CONFIG(opengl)
+#if QT_CONFIG(opengl)
+#if QT_CONFIG(opengl)
+#if QT_CONFIG(opengl)
+#if QT_CONFIG(opengl)
+#if QT_CONFIG(opengl)
 #if QT_CONFIG(opengl)
     virtual void *nativeResourceForContext(NativeResource /*resource*/, QPlatformOpenGLContext */*context*/) { return nullptr; }
 #endif /* QT_CONFIG(opengl) */
+#endif /* QT_CONFIG(opengl) */
+#endif /* QT_CONFIG(opengl) */
+#endif /* QT_CONFIG(opengl) */
+#endif /* QT_CONFIG(opengl) */
+#endif /* QT_CONFIG(opengl) */
+#endif /* QT_CONFIG(opengl) */
+#endif /* QT_CONFIG(opengl) */
+#endif /* QT_CONFIG(opengl) */
+#endif /* QT_CONFIG(opengl) */
+#endif /* QT_CONFIG(opengl) */
+#endif /* QT_CONFIG(opengl) */
+#endif /* QT_CONFIG(opengl) */
+#endif /* QT_CONFIG(opengl) */
 #endif
 };