ddidderr/zstd-rs
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Prevent fuzz testers from combining large dicts with high clevel

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This commit is contained in:
Sean Purcell
2017-03-15 15:04:54 -07:00
parent 7e35b352c6
commit f5e50519e0
2 changed files with 10 additions and 6 deletions
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tests/zstreamtest.c
+6 -4
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@@ -645,11 +645,12 @@ static int fuzzerTests(U32 seed, U32 nbTests, unsigned startTest, double compres
}
} else {
U32 const testLog = FUZ_rand(&lseed) % maxSrcLog;
U32 const cLevel = (FUZ_rand(&lseed) % (ZSTD_maxCLevel() - (testLog/3))) + 1;
U32 const dictLog = FUZ_rand(&lseed) % maxSrcLog;
U32 const cLevel = (FUZ_rand(&lseed) % (ZSTD_maxCLevel() - (MAX(testLog, dictLog)/3))) + 1;
maxTestSize = FUZ_rLogLength(&lseed, testLog);
oldTestLog = testLog;
/* random dictionary selection */
dictSize = ((FUZ_rand(&lseed)&63)==1) ? FUZ_randomLength(&lseed, maxSampleLog) : 0;
dictSize = ((FUZ_rand(&lseed)&63)==1) ? FUZ_rLogLength(&lseed, dictLog) : 0;
{ size_t const dictStart = FUZ_rand(&lseed) % (srcBufferSize - dictSize);
dict = srcBuffer + dictStart;
}
@@ -886,11 +887,12 @@ static int fuzzerTests_MT(U32 seed, U32 nbTests, unsigned startTest, double comp
}
} else {
U32 const testLog = FUZ_rand(&lseed) % maxSrcLog;
U32 const cLevel = (FUZ_rand(&lseed) % (ZSTD_maxCLevel() - (testLog/3))) + 1;
U32 const dictLog = FUZ_rand(&lseed) % maxSrcLog;
U32 const cLevel = (FUZ_rand(&lseed) % (ZSTD_maxCLevel() - (MAX(testLog, dictLog)/3))) + 1;
maxTestSize = FUZ_rLogLength(&lseed, testLog);
oldTestLog = testLog;
/* random dictionary selection */
dictSize = ((FUZ_rand(&lseed)&63)==1) ? FUZ_randomLength(&lseed, maxSampleLog) : 0;
dictSize = ((FUZ_rand(&lseed)&63)==1) ? FUZ_rLogLength(&lseed, dictLog) : 0;
{ size_t const dictStart = FUZ_rand(&lseed) % (srcBufferSize - dictSize);
dict = srcBuffer + dictStart;
}