AFAIK that can break because of the strict aliasing rules (although it might work in practice). Even if char can alias anything, the reverse is not true and you can't legally store other types in a static array of char type. You should be able to use anonymous memory though, so for example if you get your storeag via mmap or some other allocator it should be fine.

> The malloc function allocates space for an object whose size is specified by size and whose value is indeterminate.

> The lifetime of an allocated object extends from the allocation until the deallocation. Each such allocation shall yield a pointer to an object disjoint from any other object.

A static array is "an object" already. A pointer to the middle of it is not a new object.