int __init reserve_elfcorehdr(unsigned long *start, unsigned long *end)
{
	unsigned long length;

	/* We get the address using the kernel command line,
	 * but the size is extracted from the EFI tables.
	 * Both address and size are required for reservation
	 * to work properly.
	 */

	if (elfcorehdr_addr >= ELFCORE_ADDR_MAX)
		return -EINVAL;

	if ((length = vmcore_find_descriptor_size(elfcorehdr_addr)) == 0) {
		elfcorehdr_addr = ELFCORE_ADDR_MAX;
		return -EINVAL;
	}

	*start = (unsigned long)__va(elfcorehdr_addr);
	*end = *start + length;
	return 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.