Moving raw pointer contents to vector

I have a raw pointer, say,

char * ptr = (char *) malloc(LIMIT);  
size_t size;  
fill_with_data(ptr, LIMIT, &size);  

Now I'd like to wrap the pointer data using std::vector.

auto v = vector<char>(ptr, ptr + size);

But I think using the syntax above will produce a copy of the pointer's contents. Is there any way to convert a raw pointer to vector without duplicating the data in memory?