Merge pull request #326 from kevinbackhouse/fuzz-quadratic-brackets-o…

…verflow Fix bug in fuzz harness
github · Apr 5, 2023 · ef63acf · ef63acf
2 parents 2aad29d + f6e3ee1
commit ef63acf
Showing 1 changed file with 5 additions and 3 deletions.
diff --git a/fuzz/fuzz_quadratic_brackets.c b/fuzz/fuzz_quadratic_brackets.c
@@ -75,9 +75,11 @@ int LLVMFuzzerTestOneInput(const uint8_t* data, size_t size) {
  }
  offset += fuzz_config.closelen;
  }
- memcpy(&markdown[markdown_size], &markdown0[offset],
- endlen);
- markdown_size += endlen;
+ if (markdown_size + endlen <= sizeof(markdown)) {
+ memcpy(&markdown[markdown_size], &markdown0[offset],
+ endlen);
+ markdown_size += endlen;
+ }
  } else {
  markdown_size = markdown_size0;
  memcpy(markdown, markdown0, markdown_size);