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Fix wildcopy overwriting data still in window

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This commit is contained in:
Sean Purcell
2017-02-15 16:43:45 -08:00
parent 2252d29a5a
commit 887eaa9e21
4 changed files with 27 additions and 3 deletions
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tests/zstreamtest.c
+24
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@@ -467,6 +467,30 @@ static int basicUnitTests(U32 seed, double compressibility, ZSTD_customMem custo
if (ZSTD_findDecompressedSize(compressedBuffer, cSize) != ZSTD_CONTENTSIZE_UNKNOWN) goto _output_error;
DISPLAYLEVEL(3, "OK \n");
/* Overlen overwriting window data bug */
DISPLAYLEVEL(3, "test%3i : wildcopy doesn't overwrite potential match data : ", testNb++);
{ const char* testCase =
"\x28\xB5\x2F\xFD\x04\x00\x4C\x00\x00\x10\x61\x61\x01\x00\xFC\x2A"
"\xC0\x02\x44\x00\x00\x08\x62\x01\x00\xFC\x2A\x10\x02\x00\x00\x00"
"\x4D\x00\x00\x00\x02\x40\x00\x01\x64\xE0\xE6\x19\xC1\xFB\x54\x9E";
ZSTD_DStream* zds = ZSTD_createDStream();
ZSTD_initDStream(zds);
inBuff.src = testCase;
inBuff.size = 48;
inBuff.pos = 0;
outBuff.dst = decodedBuffer;
outBuff.size = CNBufferSize;
outBuff.pos = 0;
while (inBuff.pos < inBuff.size) {
size_t const r = ZSTD_decompressStream(zds, &outBuff, &inBuff);
/* Bug will cause checksum to fail */
if (ZSTD_isError(r)) goto _output_error;
}
}
DISPLAYLEVEL(3, "OK \n");
_end:
FUZ_freeDictionary(dictionary);
ZSTD_freeCStream(zc);