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Guard against invalid sequences from external matchfinders (#3465)

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This commit is contained in:
Elliot Gorokhovsky
2023-01-31 13:55:48 -05:00
committed by GitHub
parent 4794bbfe00
commit 64052ef57d
5 changed files with 96 additions and 37 deletions
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tests/external_matchfinder.c
+23
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@@ -108,6 +108,29 @@ size_t zstreamExternalMatchFinder(
compressionLevel,
windowSize
);
case EMF_INVALID_OFFSET:
outSeqs[0].offset = 1 << 20;
outSeqs[0].matchLength = 4;
outSeqs[0].litLength = (U32)(srcSize - 4);
return 1;
case EMF_INVALID_MATCHLEN:
outSeqs[0].offset = 1;
outSeqs[0].matchLength = (U32)(srcSize);
outSeqs[0].litLength = 1;
return 1;
case EMF_INVALID_LITLEN:
outSeqs[0].offset = 0;
outSeqs[0].matchLength = 0;
outSeqs[0].litLength = (U32)(srcSize + 1);
return 1;
case EMF_INVALID_LAST_LITS:
outSeqs[0].offset = 1;
outSeqs[0].matchLength = 1;
outSeqs[0].litLength = 1;
outSeqs[1].offset = 0;
outSeqs[1].matchLength = 0;
outSeqs[1].litLength = (U32)(srcSize - 1);
return 2;
case EMF_SMALL_ERROR:
return outSeqsCapacity + 1;
case EMF_BIG_ERROR: