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Secure last token decompression for non-raw blocks

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Emmanuel Marty 2019-11-26 17:35:11 +01:00 committed by GitHub
parent d37589cfdb
commit 88f563d84c
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GPG Key ID: 4AEE18F83AFDEB23
1 changed files with 2 additions and 1 deletions
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src/expand_block_v2.c
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@ -146,7 +146,7 @@ int lzsa_decompressor_expand_block_v2(const unsigned char *pInBlock, int nBlockS
}
}
if ((pInBlock + 1) < pInBlockEnd) { /* The last token in the block does not include match information */
if (pInBlock < pInBlockEnd) { /* The last token in the block does not include match information */
unsigned char nOffsetMode = token & 0xc0;
unsigned int nValue;
@ -185,6 +185,7 @@ int lzsa_decompressor_expand_block_v2(const unsigned char *pInBlock, int nBlockS
if ((token & 0x20) == 0) {
/* 16 bit offset */
nMatchOffset = (((unsigned int)(*pInBlock++)) << 8);
if (pInBlock >= pInBlockEnd) return -1;
nMatchOffset |= (unsigned int)(*pInBlock++);
nMatchOffset ^= 0xffff;
nMatchOffset++;