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Patch for LZ4 decompression bug #189

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Patch for LZ4 decompression bug #189

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12 changes: 11 additions & 1 deletion lib/lz4/lz4_decompress.c
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Original file line number Diff line number Diff line change
Expand Up @@ -140,8 +140,12 @@ static int lz4_uncompress(const char *source, char *dest, int osize)
/* Error: request to write beyond destination buffer */
if (cpy > oend)
goto _output_error;
#if LZ4_ARCH64
if ((ref + COPYLENGTH) > oend)
#else
if ((ref + COPYLENGTH) > oend ||
(op + COPYLENGTH) > oend)
#endif
goto _output_error;
LZ4_SECURECOPY(ref, op, (oend - COPYLENGTH));
while (op < cpy)
Expand Down Expand Up @@ -266,7 +270,13 @@ static int lz4_uncompress_unknownoutputsize(const char *source, char *dest,
if (cpy > oend - COPYLENGTH) {
if (cpy > oend)
goto _output_error; /* write outside of buf */

#if LZ4_ARCH4
if ((ref + COPYLENGTH) > oend)
#else
if ((ref + COPYLENGTH) > oend ||
(op + COPYLENGTH) > oend)
#endif
goto _output_error;
LZ4_SECURECOPY(ref, op, (oend - COPYLENGTH));
while (op < cpy)
*op++ = *ref++;
Expand Down