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Guard Squirrel constructor_stub() invocations from invalid class parameters

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This prevents manual invocations of the native class constructor for
non-class values or non-native classes.
This commit is contained in:
Alexander 'z33ky' Hirsch 2025-06-23 20:51:23 +02:00
parent 655679e7da
commit ca7bc5da57
1 changed files with 9 additions and 1 deletions
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10
sp/src/vscript/vscript_squirrel.cpp
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@ -1548,7 +1548,15 @@ SQInteger destructor_stub_instance(SQUserPointer p, SQInteger size)
SQInteger constructor_stub(HSQUIRRELVM vm) SQInteger constructor_stub(HSQUIRRELVM vm)
{ {
ScriptClassDesc_t* pClassDesc = nullptr; ScriptClassDesc_t* pClassDesc = nullptr;
sq_gettypetag(vm, 1, (SQUserPointer*)&pClassDesc); if (SQ_FAILED(sq_gettypetag(vm, 1, (SQUserPointer*)&pClassDesc)))
{
return sq_throwerror(vm, "Expected native class");
}
if (!pClassDesc || (void*)pClassDesc == TYPETAG_VECTOR)
{
return sq_throwerror(vm, "Unable to obtain native class description");
}
if (!pClassDesc->m_pfnConstruct) if (!pClassDesc->m_pfnConstruct)
{ {