1 // SPDX-License-Identifier: MIT
3 * Copyright (C) 2016 The Android Open Source Project
6 #include "avb_kernel_cmdline_descriptor.h"
9 bool avb_kernel_cmdline_descriptor_validate_and_byteswap(
10 const AvbKernelCmdlineDescriptor* src, AvbKernelCmdlineDescriptor* dest) {
11 uint64_t expected_size;
13 avb_memcpy(dest, src, sizeof(AvbKernelCmdlineDescriptor));
15 if (!avb_descriptor_validate_and_byteswap((const AvbDescriptor*)src,
16 (AvbDescriptor*)dest))
19 if (dest->parent_descriptor.tag != AVB_DESCRIPTOR_TAG_KERNEL_CMDLINE) {
20 avb_error("Invalid tag for kernel cmdline descriptor.\n");
24 dest->flags = avb_be32toh(dest->flags);
25 dest->kernel_cmdline_length = avb_be32toh(dest->kernel_cmdline_length);
27 /* Check that kernel_cmdline is fully contained. */
28 expected_size = sizeof(AvbKernelCmdlineDescriptor) - sizeof(AvbDescriptor);
29 if (!avb_safe_add_to(&expected_size, dest->kernel_cmdline_length)) {
30 avb_error("Overflow while adding up sizes.\n");
33 if (expected_size > dest->parent_descriptor.num_bytes_following) {
34 avb_error("Descriptor payload size overflow.\n");