diff options
Diffstat (limited to 'fuzzing')
| -rw-r--r-- | fuzzing/libfdt_fuzzer.c | 8 |
1 files changed, 6 insertions, 2 deletions
diff --git a/fuzzing/libfdt_fuzzer.c b/fuzzing/libfdt_fuzzer.c index 98e03c8..89fe3c2 100644 --- a/fuzzing/libfdt_fuzzer.c +++ b/fuzzing/libfdt_fuzzer.c @@ -55,6 +55,9 @@ static void check_mem(const void *mem, size_t len) { #endif } +static bool phandle_is_valid(uint32_t phandle) { + return phandle != 0 && phandle != UINT32_MAX; +} static void walk_device_tree(const void *device_tree, int parent_node) { int len = 0; @@ -64,8 +67,9 @@ static void walk_device_tree(const void *device_tree, int parent_node) { } uint32_t phandle = fdt_get_phandle(device_tree, parent_node); - if (phandle != 0) { - assert(parent_node == fdt_node_offset_by_phandle(device_tree, phandle)); + if (phandle_is_valid(phandle)) { + int node = fdt_node_offset_by_phandle(device_tree, phandle); + assert(node >= 0); // it should at least find parent_node } // recursively walk the node's children |