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poppler/poppler-0.73.0-PSOutputDev-buffer-read.patch
Marek Kasik ad26aced43 Don't read outside of image buffer in PSOutputDev 
Resolves: #1696640
2019-05-30 17:27:03 +02:00

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From 9bcc9d0a164dbd1f24aae8f900c28feafd0cb3f2 Mon Sep 17 00:00:00 2001
From: Marek Kasik <mkasik@redhat.com>
Date: Tue, 30 Apr 2019 18:47:44 +0200
Subject: [PATCH] PSOutputDev: Don't read outside of image buffer
Check whether input image is RGB or BGR to not treat
it as CMYK in those cases in PSOutputDev::checkPageSlice().
Fixes #751
---
poppler/PSOutputDev.cc | 248 ++++++++++++++++++++++++++++++++---------
1 file changed, 196 insertions(+), 52 deletions(-)
diff --git a/poppler/PSOutputDev.cc b/poppler/PSOutputDev.cc
index 0d201835..155a8cbe 100644
--- a/poppler/PSOutputDev.cc
+++ b/poppler/PSOutputDev.cc
@@ -3374,6 +3374,14 @@ bool PSOutputDev::checkPageSlice(Page *page, double /*hDPI*/, double /*vDPI*/,
}
break;
case psLevel1Sep:
+ GfxColor inputColor;
+ GfxCMYK cmyk;
+ unsigned char cmykColor[4];
+ GfxDeviceRGBColorSpace *rgbCS;
+ SplashColorMode colorMode;
+
+ colorMode = bitmap->getMode();
+
p = bitmap->getDataPtr();
// Check for an all gray image
if (getOptimizeColorSpace()) {
@@ -3448,65 +3456,201 @@ bool PSOutputDev::checkPageSlice(Page *page, double /*hDPI*/, double /*vDPI*/,
}
} else if (((psProcessCyan | psProcessMagenta | psProcessYellow | psProcessBlack) & ~processColors) != 0) {
// Color image, need to check color flags for each dot
- for (y = 0; y < h; ++y) {
- for (comp = 0; comp < 4; ++comp) {
- if (useBinary) {
- // Binary color image
- for (x = 0; x < w; ++x) {
- col[comp] |= p[4*x + comp];
- hexBuf[i++] = p[4*x + comp];
- if (i >= 64) {
- writePSBuf(hexBuf, i);
- i = 0;
+ switch (colorMode) {
+ case splashModeRGB8:
+ case splashModeBGR8:
+ rgbCS = new GfxDeviceRGBColorSpace();
+ for (y = 0; y < h; ++y) {
+ for (comp = 0; comp < 4; ++comp) {
+ if (useBinary) {
+ // Binary color image
+ for (x = 0; x < w; ++x) {
+ if (likely(colorMode == splashModeRGB8)) {
+ inputColor.c[0] = byteToCol(p[3*x + 0]);
+ inputColor.c[1] = byteToCol(p[3*x + 1]);
+ inputColor.c[2] = byteToCol(p[3*x + 2]);
+ } else {
+ inputColor.c[0] = byteToCol(p[3*x + 2]);
+ inputColor.c[1] = byteToCol(p[3*x + 1]);
+ inputColor.c[2] = byteToCol(p[3*x + 0]);
+ }
+ rgbCS->getCMYK(&inputColor, &cmyk);
+ cmykColor[0] = colToByte(cmyk.c);
+ cmykColor[1] = colToByte(cmyk.m);
+ cmykColor[2] = colToByte(cmyk.y);
+ cmykColor[3] = colToByte(cmyk.k);
+
+ col[comp] |= cmykColor[comp];
+ hexBuf[i++] = cmykColor[comp];
+ if (i >= 64) {
+ writePSBuf(hexBuf, i);
+ i = 0;
+ }
+ }
+ } else {
+ // Gray color image
+ for (x = 0; x < w; ++x) {
+ if (likely(colorMode == splashModeRGB8)) {
+ inputColor.c[0] = byteToCol(p[3*x + 0]);
+ inputColor.c[1] = byteToCol(p[3*x + 1]);
+ inputColor.c[2] = byteToCol(p[3*x + 2]);
+ } else {
+ inputColor.c[0] = byteToCol(p[3*x + 2]);
+ inputColor.c[1] = byteToCol(p[3*x + 1]);
+ inputColor.c[2] = byteToCol(p[3*x + 0]);
+ }
+ rgbCS->getCMYK(&inputColor, &cmyk);
+ cmykColor[0] = colToByte(cmyk.c);
+ cmykColor[1] = colToByte(cmyk.m);
+ cmykColor[2] = colToByte(cmyk.y);
+ cmykColor[3] = colToByte(cmyk.k);
+
+ col[comp] |= cmykColor[comp];
+ digit = cmykColor[comp] / 16;
+ hexBuf[i++] = digit + ((digit >= 10)? 'a' - 10: '0');
+ digit = cmykColor[comp] % 16;
+ hexBuf[i++] = digit + ((digit >= 10)? 'a' - 10: '0');
+ if (i >= 64) {
+ hexBuf[i++] = '\n';
+ writePSBuf(hexBuf, i);
+ i = 0;
+ }
+ }
}
- }
- } else {
- // Gray color image
- for (x = 0; x < w; ++x) {
- col[comp] |= p[4*x + comp];
- digit = p[4*x + comp] / 16;
- hexBuf[i++] = digit + ((digit >= 10)? 'a' - 10: '0');
- digit = p[4*x + comp] % 16;
- hexBuf[i++] = digit + ((digit >= 10)? 'a' - 10: '0');
- if (i >= 64) {
- hexBuf[i++] = '\n';
- writePSBuf(hexBuf, i);
- i = 0;
+ }
+ p -= bitmap->getRowSize();
+ }
+ delete rgbCS;
+ break;
+ default:
+ for (y = 0; y < h; ++y) {
+ for (comp = 0; comp < 4; ++comp) {
+ if (useBinary) {
+ // Binary color image
+ for (x = 0; x < w; ++x) {
+ col[comp] |= p[4*x + comp];
+ hexBuf[i++] = p[4*x + comp];
+ if (i >= 64) {
+ writePSBuf(hexBuf, i);
+ i = 0;
+ }
+ }
+ } else {
+ // Gray color image
+ for (x = 0; x < w; ++x) {
+ col[comp] |= p[4*x + comp];
+ digit = p[4*x + comp] / 16;
+ hexBuf[i++] = digit + ((digit >= 10)? 'a' - 10: '0');
+ digit = p[4*x + comp] % 16;
+ hexBuf[i++] = digit + ((digit >= 10)? 'a' - 10: '0');
+ if (i >= 64) {
+ hexBuf[i++] = '\n';
+ writePSBuf(hexBuf, i);
+ i = 0;
+ }
+ }
}
- }
- }
- }
- p -= bitmap->getRowSize();
+ }
+ p -= bitmap->getRowSize();
+ }
+ break;
}
} else {
// Color image, do not need to check color flags
- for (y = 0; y < h; ++y) {
- for (comp = 0; comp < 4; ++comp) {
- if (useBinary) {
- // Binary color image
- for (x = 0; x < w; ++x) {
- hexBuf[i++] = p[4*x + comp];
- if (i >= 64) {
- writePSBuf(hexBuf, i);
- i = 0;
+ switch (colorMode) {
+ case splashModeRGB8:
+ case splashModeBGR8:
+ rgbCS = new GfxDeviceRGBColorSpace();
+ for (y = 0; y < h; ++y) {
+ for (comp = 0; comp < 4; ++comp) {
+ if (useBinary) {
+ // Binary color image
+ for (x = 0; x < w; ++x) {
+ if (likely(colorMode == splashModeRGB8)) {
+ inputColor.c[0] = byteToCol(p[3*x + 0]);
+ inputColor.c[1] = byteToCol(p[3*x + 1]);
+ inputColor.c[2] = byteToCol(p[3*x + 2]);
+ } else {
+ inputColor.c[0] = byteToCol(p[3*x + 2]);
+ inputColor.c[1] = byteToCol(p[3*x + 1]);
+ inputColor.c[2] = byteToCol(p[3*x + 0]);
+ }
+ rgbCS->getCMYK(&inputColor, &cmyk);
+ cmykColor[0] = colToByte(cmyk.c);
+ cmykColor[1] = colToByte(cmyk.m);
+ cmykColor[2] = colToByte(cmyk.y);
+ cmykColor[3] = colToByte(cmyk.k);
+
+ hexBuf[i++] = cmykColor[comp];
+ if (i >= 64) {
+ writePSBuf(hexBuf, i);
+ i = 0;
+ }
+ }
+ } else {
+ // Hex color image
+ for (x = 0; x < w; ++x) {
+ if (likely(colorMode == splashModeRGB8)) {
+ inputColor.c[0] = byteToCol(p[3*x + 0]);
+ inputColor.c[1] = byteToCol(p[3*x + 1]);
+ inputColor.c[2] = byteToCol(p[3*x + 2]);
+ } else {
+ inputColor.c[0] = byteToCol(p[3*x + 2]);
+ inputColor.c[1] = byteToCol(p[3*x + 1]);
+ inputColor.c[2] = byteToCol(p[3*x + 0]);
+ }
+ rgbCS->getCMYK(&inputColor, &cmyk);
+ cmykColor[0] = colToByte(cmyk.c);
+ cmykColor[1] = colToByte(cmyk.m);
+ cmykColor[2] = colToByte(cmyk.y);
+ cmykColor[3] = colToByte(cmyk.k);
+
+ digit = cmykColor[comp] / 16;
+ hexBuf[i++] = digit + ((digit >= 10)? 'a' - 10: '0');
+ digit = cmykColor[comp] % 16;
+ hexBuf[i++] = digit + ((digit >= 10)? 'a' - 10: '0');
+ if (i >= 64) {
+ hexBuf[i++] = '\n';
+ writePSBuf(hexBuf, i);
+ i = 0;
+ }
+ }
}
- }
- } else {
- // Hex color image
- for (x = 0; x < w; ++x) {
- digit = p[4*x + comp] / 16;
- hexBuf[i++] = digit + ((digit >= 10)? 'a' - 10: '0');
- digit = p[4*x + comp] % 16;
- hexBuf[i++] = digit + ((digit >= 10)? 'a' - 10: '0');
- if (i >= 64) {
- hexBuf[i++] = '\n';
- writePSBuf(hexBuf, i);
- i = 0;
+ }
+ p -= bitmap->getRowSize();
+ }
+ delete rgbCS;
+ break;
+ default:
+ for (y = 0; y < h; ++y) {
+ for (comp = 0; comp < 4; ++comp) {
+ if (useBinary) {
+ // Binary color image
+ for (x = 0; x < w; ++x) {
+ hexBuf[i++] = p[4*x + comp];
+ if (i >= 64) {
+ writePSBuf(hexBuf, i);
+ i = 0;
+ }
+ }
+ } else {
+ // Hex color image
+ for (x = 0; x < w; ++x) {
+ digit = p[4*x + comp] / 16;
+ hexBuf[i++] = digit + ((digit >= 10)? 'a' - 10: '0');
+ digit = p[4*x + comp] % 16;
+ hexBuf[i++] = digit + ((digit >= 10)? 'a' - 10: '0');
+ if (i >= 64) {
+ hexBuf[i++] = '\n';
+ writePSBuf(hexBuf, i);
+ i = 0;
+ }
+ }
}
- }
- }
- }
- p -= bitmap->getRowSize();
+ }
+ p -= bitmap->getRowSize();
+ }
+ break;
}
}
if (i != 0) {
--
2.21.0
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