[fuzz] Avoid empty memcpy and ubsan complain by length checking before memcpy

5 years ago · 558f922788
parent 6543d166fd
commit 558f922788
1 changed files with 2 additions and 1 deletions
--- a/test/fuzzing/hb-shape-fuzzer.cc
+++ b/test/fuzzing/hb-shape-fuzzer.cc
@ -41,6 +41,7 @@ extern "C" int LLVMFuzzerTestOneInput(const uint8_t *data, size_t size)
  unsigned int len = sizeof (text32);
  if (size < len)
    len = size;
+  if (len)
    memcpy(text32, data + size - len, len);

  hb_buffer_t *buffer = hb_buffer_create ();