blob: 227e7119dd959707f18e64f9e7c8175d29e72a4f [file] [log] [blame]
#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.
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;
}