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deal safely with short inputs in ZSTD_ldm_generateSequences

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The fuzzer CI found this bug.
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Quentin Carbonneaux
2021-02-04 11:15:24 +01:00
parent 9f327c02fd
commit 874a590e5c
1 changed files with 3 additions and 0 deletions
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lib/compress/zstd_ldm.c
+3
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@@ -328,6 +328,9 @@ static size_t ZSTD_ldm_generateSequences_internal(
} candidates[LDM_LOOKAHEAD_SPLITS]; } candidates[LDM_LOOKAHEAD_SPLITS];
unsigned numSplits; unsigned numSplits;
if (srcSize < minMatchLength)
return iend - anchor;
/* Initialize the rolling hash state with the first minMatchLength bytes */ /* Initialize the rolling hash state with the first minMatchLength bytes */
ZSTD_ldm_gear_init(&hashState, params); ZSTD_ldm_gear_init(&hashState, params);
{ {