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imgcodesc: fix code problems with integer overflow / address arithmetic / UB

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This commit is contained in:
Alexander Alekhin
2017-08-23 15:15:27 +03:00
parent dd9bf1ba1d
commit df1a026329
7 changed files with 49 additions and 36 deletions
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modules/highgui/src/grfmt_bmp.cpp
+4 -4
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@@ -185,7 +185,7 @@ bool BmpDecoder::readHeader()
bool BmpDecoder::readData( Mat& img )
{
uchar* data = img.data;
int step = (int)img.step;
int step = validateToInt(img.step);
bool color = img.channels() > 1;
uchar gray_palette[256];
bool result = false;
@@ -198,7 +198,7 @@ bool BmpDecoder::readData( Mat& img )
if( m_origin == IPL_ORIGIN_BL )
{
data += (m_height - 1)*step;
data += (m_height - 1)*(size_t)step;
step = -step;
}
@@ -522,7 +522,7 @@ bool BmpEncoder::write( const Mat& img, const vector<int>& )
int bitmapHeaderSize = 40;
int paletteSize = channels > 1 ? 0 : 1024;
int headerSize = 14 /* fileheader */ + bitmapHeaderSize + paletteSize;
int fileSize = fileStep*height + headerSize;
size_t fileSize = (size_t)fileStep*height + headerSize;
PaletteEntry palette[256];
if( m_buf )
@@ -532,7 +532,7 @@ bool BmpEncoder::write( const Mat& img, const vector<int>& )
strm.putBytes( fmtSignBmp, (int)strlen(fmtSignBmp) );
// write file header
strm.putDWord( fileSize ); // file size
strm.putDWord( validateToInt(fileSize) ); // file size
strm.putDWord( 0 );
strm.putDWord( headerSize );
modules/highgui/src/grfmt_exr.cpp
+5 -5
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@@ -188,7 +188,7 @@ bool ExrDecoder::readData( Mat& img )
bool color = img.channels() > 1;
uchar* data = img.data;
int step = img.step;
size_t step = img.step;
bool justcopy = m_native_depth;
bool chromatorgb = false;
bool rgbtogray = false;
@@ -196,8 +196,8 @@ bool ExrDecoder::readData( Mat& img )
FrameBuffer frame;
int xsample[3] = {1, 1, 1};
char *buffer;
int xstep;
int ystep;
size_t xstep = 0;
size_t ystep = 0;
xstep = m_native_depth ? 4 : 1;
@@ -589,7 +589,7 @@ bool ExrEncoder::write( const Mat& img, const vector<int>& )
bool isfloat = depth == CV_32F || depth == CV_64F;
depth = CV_ELEM_SIZE1(depth)*8;
uchar* data = img.data;
int step = img.step;
size_t step = img.step;
Header header( width, height );
Imf::PixelType type;
@@ -619,7 +619,7 @@ bool ExrEncoder::write( const Mat& img, const vector<int>& )
FrameBuffer frame;
char *buffer;
int bufferstep;
size_t bufferstep;
int size;
if( type == FLOAT && depth == 32 )
{
modules/highgui/src/grfmt_jpeg.cpp
+1 -1
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@@ -392,7 +392,7 @@ int my_jpeg_load_dht (struct jpeg_decompress_struct *info, unsigned char *dht,
bool JpegDecoder::readData( Mat& img )
{
bool result = false;
int step = (int)img.step;
size_t step = img.step;
bool color = img.channels() > 1;
if( m_state && m_width && m_height )
modules/highgui/src/grfmt_jpeg2000.cpp
+3 -3
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@@ -156,7 +156,7 @@ bool Jpeg2KDecoder::readData( Mat& img )
bool result = false;
int color = img.channels() > 1;
uchar* data = img.data;
int step = (int)img.step;
size_t step = img.step;
jas_stream_t* stream = (jas_stream_t*)m_stream;
jas_image_t* image = (jas_image_t*)m_image;
@@ -252,9 +252,9 @@ bool Jpeg2KDecoder::readData( Mat& img )
if( !jas_image_readcmpt( image, cmptlut[i], 0, 0, xend / xstep, yend / ystep, buffer ))
{
if( img.depth() == CV_8U )
result = readComponent8u( data + i, buffer, step, cmptlut[i], maxval, offset, ncmpts );
result = readComponent8u( data + i, buffer, validateToInt(step), cmptlut[i], maxval, offset, ncmpts );
else
result = readComponent16u( ((unsigned short *)data) + i, buffer, step / 2, cmptlut[i], maxval, offset, ncmpts );
result = readComponent16u( ((unsigned short *)data) + i, buffer, validateToInt(step / 2), cmptlut[i], maxval, offset, ncmpts );
if( !result )
{
i = ncmpts;
modules/highgui/src/grfmt_sunras.cpp
+3 -3
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@@ -156,7 +156,7 @@ bool SunRasterDecoder::readData( Mat& img )
{
int color = img.channels() > 1;
uchar* data = img.data;
int step = (int)img.step;
size_t step = img.step;
uchar gray_palette[256];
bool result = false;
int src_pitch = ((m_width*m_bpp + 7)/8 + 1) & -2;
@@ -304,11 +304,11 @@ bad_decoding_1bpp:
code = m_strm.getByte();
if( color )
data = FillUniColor( data, line_end, step, width3,
data = FillUniColor( data, line_end, validateToInt(step), width3,
y, m_height, len,
m_palette[code] );
else
data = FillUniGray( data, line_end, step, width3,
data = FillUniGray( data, line_end, validateToInt(step), width3,
y, m_height, len,
gray_palette[code] );
if( y >= m_height )
modules/highgui/src/utils.cpp
+31 -20
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@@ -42,6 +42,13 @@
#include "precomp.hpp"
#include "utils.hpp"
int validateToInt(size_t sz)
{
int valueInt = (int)sz;
CV_Assert((size_t)valueInt == sz);
return valueInt;
}
#define SCALE 14
#define cR (int)(0.299*(1 << SCALE) + 0.5)
#define cG (int)(0.587*(1 << SCALE) + 0.5)
@@ -537,23 +544,25 @@ uchar* FillColorRow1( uchar* data, uchar* indices, int len, PaletteEntry* palett
{
uchar* end = data + len*3;
const PaletteEntry p0 = palette[0], p1 = palette[1];
while( (data += 24) < end )
{
int idx = *indices++;
*((PaletteEntry*)(data - 24)) = palette[(idx & 128) != 0];
*((PaletteEntry*)(data - 21)) = palette[(idx & 64) != 0];
*((PaletteEntry*)(data - 18)) = palette[(idx & 32) != 0];
*((PaletteEntry*)(data - 15)) = palette[(idx & 16) != 0];
*((PaletteEntry*)(data - 12)) = palette[(idx & 8) != 0];
*((PaletteEntry*)(data - 9)) = palette[(idx & 4) != 0];
*((PaletteEntry*)(data - 6)) = palette[(idx & 2) != 0];
*((PaletteEntry*)(data - 3)) = palette[(idx & 1) != 0];
*((PaletteEntry*)(data - 24)) = (idx & 128) ? p1 : p0;
*((PaletteEntry*)(data - 21)) = (idx & 64) ? p1 : p0;
*((PaletteEntry*)(data - 18)) = (idx & 32) ? p1 : p0;
*((PaletteEntry*)(data - 15)) = (idx & 16) ? p1 : p0;
*((PaletteEntry*)(data - 12)) = (idx & 8) ? p1 : p0;
*((PaletteEntry*)(data - 9)) = (idx & 4) ? p1 : p0;
*((PaletteEntry*)(data - 6)) = (idx & 2) ? p1 : p0;
*((PaletteEntry*)(data - 3)) = (idx & 1) ? p1 : p0;
}
int idx = indices[0] << 24;
int idx = indices[0];
for( data -= 24; data < end; data += 3, idx += idx )
{
PaletteEntry clr = palette[idx < 0];
const PaletteEntry clr = (idx & 128) ? p1 : p0;
WRITE_PIX( data, clr );
}
@@ -565,23 +574,25 @@ uchar* FillGrayRow1( uchar* data, uchar* indices, int len, uchar* palette )
{
uchar* end = data + len;
const uchar p0 = palette[0], p1 = palette[1];
while( (data += 8) < end )
{
int idx = *indices++;
*((uchar*)(data - 8)) = palette[(idx & 128) != 0];
*((uchar*)(data - 7)) = palette[(idx & 64) != 0];
*((uchar*)(data - 6)) = palette[(idx & 32) != 0];
*((uchar*)(data - 5)) = palette[(idx & 16) != 0];
*((uchar*)(data - 4)) = palette[(idx & 8) != 0];
*((uchar*)(data - 3)) = palette[(idx & 4) != 0];
*((uchar*)(data - 2)) = palette[(idx & 2) != 0];
*((uchar*)(data - 1)) = palette[(idx & 1) != 0];
*((uchar*)(data - 8)) = (idx & 128) ? p1 : p0;
*((uchar*)(data - 7)) = (idx & 64) ? p1 : p0;
*((uchar*)(data - 6)) = (idx & 32) ? p1 : p0;
*((uchar*)(data - 5)) = (idx & 16) ? p1 : p0;
*((uchar*)(data - 4)) = (idx & 8) ? p1 : p0;
*((uchar*)(data - 3)) = (idx & 4) ? p1 : p0;
*((uchar*)(data - 2)) = (idx & 2) ? p1 : p0;
*((uchar*)(data - 1)) = (idx & 1) ? p1 : p0;
}
int idx = indices[0] << 24;
int idx = indices[0];
for( data -= 8; data < end; data++, idx += idx )
{
data[0] = palette[idx < 0];
data[0] = (idx & 128) ? p1 : p0;
}
return data;
modules/highgui/src/utils.hpp
+2
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@@ -42,6 +42,8 @@
#ifndef _UTILS_H_
#define _UTILS_H_
int validateToInt(size_t step);
struct PaletteEntry
{
unsigned char b, g, r, a;