static int fault_in_user_writeable(u32 __user *uaddr)
{
	struct mm_struct *mm = current->mm;
	int ret;

	down_read(&mm->mmap_sem);
	ret = get_user_pages(current, mm, (unsigned long)uaddr,
			     1, 1, 0, NULL, NULL);
	up_read(&mm->mmap_sem);

	return ret < 0 ? ret : 0;
}

The product performs operations on a memory buffer, but it reads from or writes to a memory location outside the buffer's intended boundary. This may result in read or write operations on unexpected memory locations that could be linked to other variables, data structures, or internal program data.