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

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This commit is contained in:
Ebrahim Byagowi 2020-03-03 20:27:19 +03:30
parent 6543d166fd
commit 558f922788
1 changed files with 2 additions and 1 deletions
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test/fuzzing/hb-shape-fuzzer.cc
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@ -41,7 +41,8 @@ extern "C" int LLVMFuzzerTestOneInput(const uint8_t *data, size_t size)
unsigned int len = sizeof (text32); unsigned int len = sizeof (text32);
if (size < len) if (size < len)
len = size; len = size;
memcpy(text32, data + size - len, len); if (len)
memcpy(text32, data + size - len, len);
hb_buffer_t *buffer = hb_buffer_create (); hb_buffer_t *buffer = hb_buffer_create ();
hb_buffer_add_utf32 (buffer, text32, sizeof (text32) / sizeof (text32[0]), 0, -1); hb_buffer_add_utf32 (buffer, text32, sizeof (text32) / sizeof (text32[0]), 0, -1);