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Merge pull request #964 from sigiesec/fix-ubsan-resetStreamHC_fast

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Don't trigger UBSan warning in LZ4_resetStreamHC_fast if LZ4_streamHC…
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Yann Collet 2021-01-19 02:54:18 -08:00 committed by GitHub
commit a8e888774a
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1 changed files with 5 additions and 1 deletions
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6
lib/lz4hc.c
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@ -1031,7 +1031,11 @@ void LZ4_resetStreamHC_fast (LZ4_streamHC_t* LZ4_streamHCPtr, int compressionLev
LZ4_initStreamHC(LZ4_streamHCPtr, sizeof(*LZ4_streamHCPtr)); LZ4_initStreamHC(LZ4_streamHCPtr, sizeof(*LZ4_streamHCPtr));
} else { } else {
/* preserve end - base : can trigger clearTable's threshold */ /* preserve end - base : can trigger clearTable's threshold */
LZ4_streamHCPtr->internal_donotuse.end -= (uptrval)LZ4_streamHCPtr->internal_donotuse.base; if (LZ4_streamHCPtr->internal_donotuse.end != NULL) {
LZ4_streamHCPtr->internal_donotuse.end -= (uptrval)LZ4_streamHCPtr->internal_donotuse.base;
} else {
assert(LZ4_streamHCPtr->internal_donotuse.base == NULL);
}
LZ4_streamHCPtr->internal_donotuse.base = NULL; LZ4_streamHCPtr->internal_donotuse.base = NULL;
LZ4_streamHCPtr->internal_donotuse.dictCtx = NULL; LZ4_streamHCPtr->internal_donotuse.dictCtx = NULL;
} }