Kernel: And some more KUBSAN checks :^)

Here comes a few more:

* enum
* object-size
* vptr

Kernel/CMakeLists.txt

@@ -270,7 +270,7 @@ set(SOURCES
     ${C_SOURCES}
 )
 
-set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -fsanitize=nonnull-attribute,bool,vla-bound,signed-integer-overflow,shift,shift-exponent,shift-base,integer-divide-by-zero,return,bounds,bounds-strict")
+set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -fsanitize=nonnull-attribute,bool,vla-bound,signed-integer-overflow,shift,shift-exponent,shift-base,integer-divide-by-zero,return,bounds,bounds-strict,object-size,enum,vptr")
 set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -Wno-unknown-warning-option -DKERNEL")
 set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -pie -fPIE -fno-rtti -ffreestanding -fbuiltin")
 set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -mno-80387 -mno-mmx -mno-sse -mno-sse2")

Kernel/UBSanitizer.cpp

@@ -108,4 +108,11 @@ void __ubsan_handle_out_of_bounds(const OutOfBoundsData& data, void*)
     dbgln("KUBSAN: out of bounds access into array of {} ({}-bit), index type {} ({}-bit)", data.array_type.name(), data.array_type.bit_width(), data.index_type.name(), data.index_type.bit_width());
     print_location(data.location);
 }
+
+void __ubsan_handle_type_mismatch_v1(const TypeMismatchData&, void*);
+void __ubsan_handle_type_mismatch_v1(const TypeMismatchData& data, void*)
+{
+    dbgln("KUBSAN: type mismatch, {} ({}-bit)", data.type.name(), data.type.bit_width());
+    print_location(data.location);
+}
 }

Kernel/UBSanitizer.h

@@ -96,4 +96,11 @@ struct OutOfBoundsData {
     const TypeDescriptor& index_type;
 };
 
+struct TypeMismatchData {
+    SourceLocation location;
+    const TypeDescriptor& type;
+    u8 log_alignment;
+    u8 type_check_kind;
+};
+
 }