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Security Vulnerability - Action Required: heap-based buffer overflow vulnerability may in your project #103

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Security Vulnerability - Action Required: heap-based buffer overflow vulnerability may in your project #103

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14 changes: 13 additions & 1 deletion src/3rdparty/libjpeg/src/jdlossls.c
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Original file line number Diff line number Diff line change
Expand Up @@ -216,8 +216,16 @@ METHODDEF(void)
simple_upscale(j_decompress_ptr cinfo,
JDIFFROW diff_buf, _JSAMPROW output_buf, JDIMENSION width)
{
do {
do {
#if BITS_IN_JSAMPLE == 12
/* 12-bit is the only data precision for which the range of the sample data
* type exceeds the valid sample range. Thus, we need to range-limit the
* samples, because other algorithms may try to use them as array indices.
*/
*output_buf++ = (_JSAMPLE)((*diff_buf++ << cinfo->Al) & 0xFFF);
#else
*output_buf++ = (_JSAMPLE)(*diff_buf++ << cinfo->Al);
#endif
} while (--width);
}

Expand All @@ -226,7 +234,11 @@ noscale(j_decompress_ptr cinfo,
JDIFFROW diff_buf, _JSAMPROW output_buf, JDIMENSION width)
{
do {
#if BITS_IN_JSAMPLE == 12
*output_buf++ = (_JSAMPLE)((*diff_buf++) & 0xFFF);
#else
*output_buf++ = (_JSAMPLE)(*diff_buf++);
#endif
} while (--width);
}

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