| #include <assert.h> |
| #include <stdint.h> |
| #include <stdio.h> |
| #include <stdlib.h> |
| |
| #include "libfdt.h" |
| #include "libfdt_env.h" |
| |
| void walk_device_tree(const void *device_tree, int parent_node) { |
| int len = 0; |
| const char *node_name = fdt_get_name(device_tree, parent_node, &len); |
| if (node_name != NULL) { |
| // avoid clang complaining about unused variable node_name and force |
| // ASan to validate string pointer in strlen call. |
| assert(strlen(node_name) == len); |
| } |
| |
| uint32_t phandle = fdt_get_phandle(device_tree, parent_node); |
| if (phandle != 0) { |
| assert(parent_node == fdt_node_offset_by_phandle(device_tree, phandle)); |
| } |
| |
| // recursively walk the node's children |
| for (int node = fdt_first_subnode(device_tree, parent_node); node >= 0; |
| node = fdt_next_subnode(device_tree, node)) { |
| walk_device_tree(device_tree, node); |
| } |
| } |
| |
| // Information on device tree is available in external/dtc/Documentation/ |
| // folder. |
| extern "C" int LLVMFuzzerTestOneInput(const uint8_t *data, size_t size) { |
| // Non-zero return values are reserved for future use. |
| if (size < FDT_V17_SIZE) return 0; |
| |
| if (fdt_check_full(data, size) != 0) return 0; |
| |
| int root_node_offset = 0; |
| walk_device_tree(data, root_node_offset); |
| |
| return 0; |
| } |