SaveStates: Reject unrealistic memory allocations

Author: elad335

rpcs3/Emu/Cell/lv2/sys_prx.cpp

@@ -324,7 +324,7 @@ std::function<void(void*)> lv2_prx::load(utils::serial& ar)
 	const u32 state{ar};
 
 	usz seg_count = 0;
-	ar.deserialize_vle(seg_count);
+	ar.deserialize_vle<9>(seg_count);
 
 	shared_ptr<lv2_prx> prx;
 

rpcs3/util/serialization.hpp

@@ -206,12 +206,12 @@ namespace utils
 			return true;
 		}
 
-		template <typename T> requires Integral<T>
+		template <uint MaxBits = 0, typename T> requires Integral<T> && (MaxBits <= sizeof(T) * 8)
 		bool deserialize_vle(T& value)
 		{
 			using unsigned_type = std::make_unsigned_t<T>;
 			unsigned_type result{};
-			constexpr u32 bit_width = sizeof(T) * 8;
+			constexpr u32 bit_width = MaxBits ? sizeof(T) * 8 : MaxBits;
 			value = {};
 
 			for (u32 i = 0;; i += 7)
@@ -306,7 +306,7 @@ namespace utils
 			}
 
 			usz size = 0;
-			if (!deserialize_vle(size))
+			if (!deserialize_vle<28>(size))
 			{
 				return false;
 			}
@@ -423,7 +423,7 @@ namespace utils
 			}
 
 			usz size = 0;
-			if (!deserialize_vle(size))
+			if (!deserialize_vle<28>(size))
 			{
 				return false;
 			}