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Exercise ZSTD_findDecompressedSize() in the simple decompression fuzzer (#3959)

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* Improve decompression fuzzer

* Fix legacy frame header fuzzer crash, add unit test
This commit is contained in:
Elliot Gorokhovsky
2024-03-12 17:07:06 -04:00
committed by GitHub
parent 92fbd42894
commit f65b9e27ce
3 changed files with 25 additions and 1 deletions
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tests/fuzz/simple_decompress.c
+7 -1
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@@ -37,7 +37,13 @@ int LLVMFuzzerTestOneInput(const uint8_t *src, size_t size)
size_t const bufSize = FUZZ_dataProducer_uint32Range(producer, 0, 10 * size);
void *rBuf = FUZZ_malloc(bufSize);
ZSTD_decompressDCtx(dctx, rBuf, bufSize, src, size);
size_t const dSize = ZSTD_decompressDCtx(dctx, rBuf, bufSize, src, size);
if (!ZSTD_isError(dSize)) {
/* If decompression was successful, the content size from the frame header(s) should be valid. */
size_t const expectedSize = ZSTD_findDecompressedSize(src, size);
FUZZ_ASSERT(expectedSize != ZSTD_CONTENTSIZE_ERROR);
FUZZ_ASSERT(expectedSize == ZSTD_CONTENTSIZE_UNKNOWN || expectedSize == dSize);
}
free(rBuf);
FUZZ_dataProducer_free(producer);