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fixed asan warnings

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This commit is contained in:
Yann Collet
2015-11-13 15:08:43 +01:00
parent 89db5e001d
commit 93a823ccb7
3 changed files with 66 additions and 42 deletions
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lib/zstd_decompress.c
+61 -34
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@@ -488,45 +488,72 @@ FORCE_INLINE size_t ZSTD_execSequence(BYTE* op,
/* check */
//if (match > op) return ERROR(corruption_detected); /* address space overflow test (is clang optimizer wrongly removing this test ?) */
if (sequence.offset > (size_t)op) return ERROR(corruption_detected); /* address space overflow test (this test seems kept by clang optimizer) */
if (match < vBase) return ERROR(corruption_detected);
if (match < base) match = dictEnd - (base-match); /* only works if match + matchLength <= dictEnd */
if (match < base)
{
/* offset beyond prefix */
if (match < vBase) return ERROR(corruption_detected);
match = dictEnd - (base-match);
if (match + sequence.matchLength <= dictEnd - 8)
{
ZSTD_wildcopy(op, match, sequence.matchLength-8); /* works even if matchLength < 8 */
return oMatchEnd - ostart;
}
if (match + sequence.matchLength <= dictEnd)
{
memcpy(op, match, sequence.matchLength);
return oMatchEnd - ostart;
}
/* span extDict & currentPrefixSegment */
{
size_t length1 = dictEnd - match;
size_t length2 = sequence.matchLength - length1;
memcpy(op, match, length1);
op += length1;
memcpy(op, base, length2); /* will fail in case of overlapping match */
return oMatchEnd - ostart;
}
}
/* close range match, overlap */
if (sequence.offset < 8)
{
const int dec64 = dec64table[sequence.offset];
op[0] = match[0];
op[1] = match[1];
op[2] = match[2];
op[3] = match[3];
match += dec32table[sequence.offset];
ZSTD_copy4(op+4, match);
match -= dec64;
}
else
{
ZSTD_copy8(op, match);
}
op += 8; match += 8;
{
/* match within prefix */
if (sequence.offset < 8)
{
/* close range match, overlap */
const int dec64 = dec64table[sequence.offset];
op[0] = match[0];
op[1] = match[1];
op[2] = match[2];
op[3] = match[3];
match += dec32table[sequence.offset];
ZSTD_copy4(op+4, match);
match -= dec64;
}
else
{
ZSTD_copy8(op, match);
}
op += 8; match += 8;
if (oMatchEnd > oend-12)
{
if (op < oend_8)
{
ZSTD_wildcopy(op, match, oend_8 - op);
match += oend_8 - op;
op = oend_8;
}
while (op < oMatchEnd) *op++ = *match++;
}
else
{
ZSTD_wildcopy(op, match, sequence.matchLength-8); /* works even if matchLength < 8 */
}
return oMatchEnd - ostart;
}
if (oMatchEnd > oend-12)
{
if (op < oend_8)
{
ZSTD_wildcopy(op, match, oend_8 - op);
match += oend_8 - op;
op = oend_8;
}
while (op < oMatchEnd) *op++ = *match++;
}
else
{
ZSTD_wildcopy(op, match, sequence.matchLength-8); /* works even if matchLength < 8 */
}
}
return oMatchEnd - ostart;
}
static size_t ZSTD_decompressSequences(