Objective-C : Incorrect sizeof usage in malloc

The sizeof function is used incorrectly in the memory allocation function, which could lead to a buffer overflow.

If the incorrect calculation is used in the context of memory allocation, then the software may create a buffer that is smaller or larger than expected. If allocated buffer is less than expected, it may lead to out-of-bounds read or write, which in turn causing a denial of service, arbitrary code execution or disclosure of sensitive data.