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Merge pull request #85280 from bruvzg/custom_call_read_after_free

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Prevent read-after-free in the queued CallableCustomStaticMethodPointer.
This commit is contained in:
Rémi Verschelde 2023-11-24 00:00:52 +01:00
commit 4247244071
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GPG Key ID: C3336907360768E1
1 changed files with 0 additions and 24 deletions
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24
core/object/callable_method_pointer.h
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@ -81,35 +81,27 @@ template <class T, class... P>
class CallableCustomMethodPointer : public CallableCustomMethodPointerBase {
struct Data {
T *instance;
#ifdef DEBUG_ENABLED
uint64_t object_id;
#endif
void (T::*method)(P...);
} data;
public:
virtual ObjectID get_object() const {
#ifdef DEBUG_ENABLED
if (ObjectDB::get_instance(ObjectID(data.object_id)) == nullptr) {
return ObjectID();
}
#endif
return data.instance->get_instance_id();
}
virtual void call(const Variant **p_arguments, int p_argcount, Variant &r_return_value, Callable::CallError &r_call_error) const {
#ifdef DEBUG_ENABLED
ERR_FAIL_NULL_MSG(ObjectDB::get_instance(ObjectID(data.object_id)), "Invalid Object id '" + uitos(data.object_id) + "', can't call method.");
#endif
call_with_variant_args(data.instance, data.method, p_arguments, p_argcount, r_call_error);
}
CallableCustomMethodPointer(T *p_instance, void (T::*p_method)(P...)) {
memset(&data, 0, sizeof(Data)); // Clear beforehand, may have padding bytes.
data.instance = p_instance;
#ifdef DEBUG_ENABLED
data.object_id = p_instance->get_instance_id();
#endif
data.method = p_method;
_setup((uint32_t *)&data, sizeof(Data));
}
@ -135,36 +127,28 @@ template <class T, class R, class... P>
class CallableCustomMethodPointerRet : public CallableCustomMethodPointerBase {
struct Data {
T *instance;
#ifdef DEBUG_ENABLED
uint64_t object_id;
#endif
R(T::*method)
(P...);
} data;
public:
virtual ObjectID get_object() const {
#ifdef DEBUG_ENABLED
if (ObjectDB::get_instance(ObjectID(data.object_id)) == nullptr) {
return ObjectID();
}
#endif
return data.instance->get_instance_id();
}
virtual void call(const Variant **p_arguments, int p_argcount, Variant &r_return_value, Callable::CallError &r_call_error) const {
#ifdef DEBUG_ENABLED
ERR_FAIL_NULL_MSG(ObjectDB::get_instance(ObjectID(data.object_id)), "Invalid Object id '" + uitos(data.object_id) + "', can't call method.");
#endif
call_with_variant_args_ret(data.instance, data.method, p_arguments, p_argcount, r_return_value, r_call_error);
}
CallableCustomMethodPointerRet(T *p_instance, R (T::*p_method)(P...)) {
memset(&data, 0, sizeof(Data)); // Clear beforehand, may have padding bytes.
data.instance = p_instance;
#ifdef DEBUG_ENABLED
data.object_id = p_instance->get_instance_id();
#endif
data.method = p_method;
_setup((uint32_t *)&data, sizeof(Data));
}
@ -190,36 +174,28 @@ template <class T, class R, class... P>
class CallableCustomMethodPointerRetC : public CallableCustomMethodPointerBase {
struct Data {
T *instance;
#ifdef DEBUG_ENABLED
uint64_t object_id;
#endif
R(T::*method)
(P...) const;
} data;
public:
virtual ObjectID get_object() const override {
#ifdef DEBUG_ENABLED
if (ObjectDB::get_instance(ObjectID(data.object_id)) == nullptr) {
return ObjectID();
}
#endif
return data.instance->get_instance_id();
}
virtual void call(const Variant **p_arguments, int p_argcount, Variant &r_return_value, Callable::CallError &r_call_error) const override {
#ifdef DEBUG_ENABLED
ERR_FAIL_NULL_MSG(ObjectDB::get_instance(ObjectID(data.object_id)), "Invalid Object id '" + uitos(data.object_id) + "', can't call method.");
#endif
call_with_variant_args_retc(data.instance, data.method, p_arguments, p_argcount, r_return_value, r_call_error);
}
CallableCustomMethodPointerRetC(T *p_instance, R (T::*p_method)(P...) const) {
memset(&data, 0, sizeof(Data)); // Clear beforehand, may have padding bytes.
data.instance = p_instance;
#ifdef DEBUG_ENABLED
data.object_id = p_instance->get_instance_id();
#endif
data.method = p_method;
_setup((uint32_t *)&data, sizeof(Data));
}