Merge "fastboot: vendor boot img util OOB"

    if (memcmp(hdr->magic, VENDOR_BOOT_MAGIC, VENDOR_BOOT_MAGIC_SIZE) != 0) {

        return Errorf("Vendor boot image magic mismatch");

    }

    if (hdr->page_size == 0) {

        return Errorf("Page size cannot be zero");

    }

    if (hdr->header_version < version) {

        return Errorf("Require vendor boot header V{} but is V{}", version, hdr->header_version);

    }

}

// round |value| up to a multiple of |page_size|.

// aware that this can be integer overflow if value is too large

inline uint32_t round_up(uint32_t value, uint32_t page_size) {

    return (value + page_size - 1) / page_size * page_size;

}

    const uint32_t r = round_up(hdr->vendor_ramdisk_table_size, hdr->page_size);

    const uint32_t s = round_up(hdr->bootconfig_size, hdr->page_size);

    if (hdr->vendor_ramdisk_table_entry_num == std::numeric_limits<uint32_t>::max()) {

    uint64_t total_size = (uint64_t)o + p + q + r + s;

    if (total_size > vendor_boot.size()) {

        return Errorf("Vendor boot image size is too small, overflow");

    }

    if ((uint64_t)hdr->vendor_ramdisk_table_entry_num * sizeof(vendor_ramdisk_table_entry_v4) >

        (uint64_t)o + p + q + r) {

        return Errorf("Too many vendor ramdisk entries in table, overflow");

    }