opt/xpdf/xpdf-3.01pl2.patch

diff -cr xpdf-3.01.orig/goo/gmem.c xpdf-3.01/goo/gmem.c
*** xpdf-3.01.orig/goo/gmem.c	Tue Aug 16 22:34:30 2005
--- xpdf-3.01/goo/gmem.c	Tue Jan 17 17:03:57 2006
***************
*** 11,16 ****
--- 11,17 ----
  #include <stdlib.h>
  #include <stddef.h>
  #include <string.h>
+ #include <limits.h>
  #include "gmem.h"
  
  #ifdef DEBUG_MEM
***************
*** 63,69 ****
    int lst;
    unsigned long *trl, *p;
  
!   if (size == 0)
      return NULL;
    size1 = gMemDataSize(size);
    if (!(mem = (char *)malloc(size1 + gMemHdrSize + gMemTrlSize))) {
--- 64,70 ----
    int lst;
    unsigned long *trl, *p;
  
!   if (size <= 0)
      return NULL;
    size1 = gMemDataSize(size);
    if (!(mem = (char *)malloc(size1 + gMemHdrSize + gMemTrlSize))) {
***************
*** 86,92 ****
  #else
    void *p;
  
!   if (size == 0)
      return NULL;
    if (!(p = malloc(size))) {
      fprintf(stderr, "Out of memory\n");
--- 87,93 ----
  #else
    void *p;
  
!   if (size <= 0)
      return NULL;
    if (!(p = malloc(size))) {
      fprintf(stderr, "Out of memory\n");
***************
*** 102,108 ****
    void *q;
    int oldSize;
  
!   if (size == 0) {
      if (p)
        gfree(p);
      return NULL;
--- 103,109 ----
    void *q;
    int oldSize;
  
!   if (size <= 0) {
      if (p)
        gfree(p);
      return NULL;
***************
*** 120,126 ****
  #else
    void *q;
  
!   if (size == 0) {
      if (p)
        free(p);
      return NULL;
--- 121,127 ----
  #else
    void *q;
  
!   if (size <= 0) {
      if (p)
        free(p);
      return NULL;
***************
*** 140,147 ****
  void *gmallocn(int nObjs, int objSize) {
    int n;
  
    n = nObjs * objSize;
!   if (objSize == 0 || n / objSize != nObjs) {
      fprintf(stderr, "Bogus memory allocation size\n");
      exit(1);
    }
--- 141,151 ----
  void *gmallocn(int nObjs, int objSize) {
    int n;
  
+   if (nObjs == 0) {
+     return NULL;
+   }
    n = nObjs * objSize;
!   if (objSize <= 0 || nObjs < 0 || nObjs >= INT_MAX / objSize) {
      fprintf(stderr, "Bogus memory allocation size\n");
      exit(1);
    }
***************
*** 151,158 ****
  void *greallocn(void *p, int nObjs, int objSize) {
    int n;
  
    n = nObjs * objSize;
!   if (objSize == 0 || n / objSize != nObjs) {
      fprintf(stderr, "Bogus memory allocation size\n");
      exit(1);
    }
--- 155,168 ----
  void *greallocn(void *p, int nObjs, int objSize) {
    int n;
  
+   if (nObjs == 0) {
+     if (p) {
+       gfree(p);
+     }
+     return NULL;
+   }
    n = nObjs * objSize;
!   if (objSize <= 0 || nObjs < 0 || nObjs >= INT_MAX / objSize) {
      fprintf(stderr, "Bogus memory allocation size\n");
      exit(1);
    }
diff -cr xpdf-3.01.orig/xpdf/JBIG2Stream.cc xpdf-3.01/xpdf/JBIG2Stream.cc
*** xpdf-3.01.orig/xpdf/JBIG2Stream.cc	Tue Aug 16 22:34:31 2005
--- xpdf-3.01/xpdf/JBIG2Stream.cc	Tue Jan 17 17:29:46 2006
***************
*** 13,18 ****
--- 13,19 ----
  #endif
  
  #include <stdlib.h>
+ #include <limits.h>
  #include "GList.h"
  #include "Error.h"
  #include "JArithmeticDecoder.h"
***************
*** 681,686 ****
--- 682,691 ----
    w = wA;
    h = hA;
    line = (wA + 7) >> 3;
+   if (w <= 0 || h <= 0 || line <= 0 || h >= (INT_MAX - 1) / line) {
+     data = NULL;
+     return;
+   }
    // need to allocate one extra guard byte for use in combine()
    data = (Guchar *)gmalloc(h * line + 1);
    data[h * line] = 0;
***************
*** 692,697 ****
--- 697,706 ----
    w = bitmap->w;
    h = bitmap->h;
    line = bitmap->line;
+   if (w <= 0 || h <= 0 || line <= 0 || h >= (INT_MAX - 1) / line) {
+     data = NULL;
+     return;
+   }
    // need to allocate one extra guard byte for use in combine()
    data = (Guchar *)gmalloc(h * line + 1);
    memcpy(data, bitmap->data, h * line);
***************
*** 720,726 ****
  }
  
  void JBIG2Bitmap::expand(int newH, Guint pixel) {
!   if (newH <= h) {
      return;
    }
    // need to allocate one extra guard byte for use in combine()
--- 729,735 ----
  }
  
  void JBIG2Bitmap::expand(int newH, Guint pixel) {
!   if (newH <= h || line <= 0 || newH >= (INT_MAX - 1) / line) {
      return;
    }
    // need to allocate one extra guard byte for use in combine()
***************
*** 2294,2299 ****
--- 2303,2316 ----
        !readUWord(&stepX) || !readUWord(&stepY)) {
      goto eofError;
    }
+   if (w == 0 || h == 0 || w >= INT_MAX / h) {
+     error(getPos(), "Bad bitmap size in JBIG2 halftone segment");
+     return;
+   }
+   if (gridH == 0 || gridW >= INT_MAX / gridH) {
+     error(getPos(), "Bad grid size in JBIG2 halftone segment");
+     return;
+   }
  
    // get pattern dictionary
    if (nRefSegs != 1) {
diff -cr xpdf-3.01.orig/xpdf/JPXStream.cc xpdf-3.01/xpdf/JPXStream.cc
*** xpdf-3.01.orig/xpdf/JPXStream.cc	Tue Aug 16 22:34:31 2005
--- xpdf-3.01/xpdf/JPXStream.cc	Tue Jan 17 17:14:06 2006
***************
*** 12,17 ****
--- 12,18 ----
  #pragma implementation
  #endif
  
+ #include <limits.h>
  #include "gmem.h"
  #include "Error.h"
  #include "JArithmeticDecoder.h"
***************
*** 818,823 ****
--- 819,830 ----
  	            / img.xTileSize;
        img.nYTiles = (img.ySize - img.yTileOffset + img.yTileSize - 1)
  	            / img.yTileSize;
+       // check for overflow before allocating memory
+       if (img.nXTiles <= 0 || img.nYTiles <= 0 ||
+ 	  img.nXTiles >= INT_MAX / img.nYTiles) {
+ 	error(getPos(), "Bad tile count in JPX SIZ marker segment");
+ 	return gFalse;
+       }
        img.tiles = (JPXTile *)gmallocn(img.nXTiles * img.nYTiles,
  				      sizeof(JPXTile));
        for (i = 0; i < img.nXTiles * img.nYTiles; ++i) {
diff -cr xpdf-3.01.orig/xpdf/Stream.cc xpdf-3.01/xpdf/Stream.cc
*** xpdf-3.01.orig/xpdf/Stream.cc	Tue Aug 16 22:34:31 2005
--- xpdf-3.01/xpdf/Stream.cc	Tue Jan 17 17:31:52 2006
***************
*** 15,20 ****
--- 15,21 ----
  #include <stdio.h>
  #include <stdlib.h>
  #include <stddef.h>
+ #include <limits.h>
  #ifndef WIN32
  #include <unistd.h>
  #endif
***************
*** 406,418 ****
--- 407,432 ----
    width = widthA;
    nComps = nCompsA;
    nBits = nBitsA;
+   predLine = NULL;
+   ok = gFalse;
  
    nVals = width * nComps;
+   if (width <= 0 || nComps <= 0 || nBits <= 0 ||
+       nComps >= INT_MAX / nBits ||
+       width >= INT_MAX / nComps / nBits ||
+       nVals * nBits + 7 < 0) {
+     return;
+   }
    pixBytes = (nComps * nBits + 7) >> 3;
    rowBytes = ((nVals * nBits + 7) >> 3) + pixBytes;
+   if (rowBytes <= 0) {
+     return;
+   }
    predLine = (Guchar *)gmalloc(rowBytes);
    memset(predLine, 0, rowBytes);
    predIdx = rowBytes;
+ 
+   ok = gTrue;
  }
  
  StreamPredictor::~StreamPredictor() {
***************
*** 1004,1009 ****
--- 1018,1027 ----
      FilterStream(strA) {
    if (predictor != 1) {
      pred = new StreamPredictor(this, predictor, columns, colors, bits);
+     if (!pred->isOk()) {
+       delete pred;
+       pred = NULL;
+     }
    } else {
      pred = NULL;
    }
***************
*** 1259,1264 ****
--- 1277,1285 ----
    if (columns < 1) {
      columns = 1;
    }
+   if (columns + 4 <= 0) {
+     columns = INT_MAX - 4;
+   }
    rows = rowsA;
    endOfBlock = endOfBlockA;
    black = blackA;
***************
*** 2899,2904 ****
--- 2920,2930 ----
    height = read16();
    width = read16();
    numComps = str->getChar();
+   if (numComps <= 0 || numComps > 4) {
+     error(getPos(), "Bad number of components in DCT stream");
+     numComps = 0;
+     return gFalse;
+   }
    if (prec != 8) {
      error(getPos(), "Bad DCT precision %d", prec);
      return gFalse;
***************
*** 2925,2930 ****
--- 2951,2961 ----
    height = read16();
    width = read16();
    numComps = str->getChar();
+   if (numComps <= 0 || numComps > 4) {
+     error(getPos(), "Bad number of components in DCT stream");
+     numComps = 0;
+     return gFalse;
+   }
    if (prec != 8) {
      error(getPos(), "Bad DCT precision %d", prec);
      return gFalse;
***************
*** 2947,2952 ****
--- 2978,2988 ----
  
    length = read16() - 2;
    scanInfo.numComps = str->getChar();
+   if (scanInfo.numComps <= 0 || scanInfo.numComps > 4) {
+     error(getPos(), "Bad number of components in DCT stream");
+     scanInfo.numComps = 0;
+     return gFalse;
+   }
    --length;
    if (length != 2 * scanInfo.numComps + 3) {
      error(getPos(), "Bad DCT scan info block");
***************
*** 3041,3046 ****
--- 3077,3083 ----
  	numACHuffTables = index+1;
        tbl = &acHuffTables[index];
      } else {
+       index &= 0x0f;
        if (index >= numDCHuffTables)
  	numDCHuffTables = index+1;
        tbl = &dcHuffTables[index];
***************
*** 3827,3832 ****
--- 3864,3873 ----
      FilterStream(strA) {
    if (predictor != 1) {
      pred = new StreamPredictor(this, predictor, columns, colors, bits);
+     if (!pred->isOk()) {
+       delete pred;
+       pred = NULL;
+     }
    } else {
      pred = NULL;
    }
diff -cr xpdf-3.01.orig/xpdf/Stream.h xpdf-3.01/xpdf/Stream.h
*** xpdf-3.01.orig/xpdf/Stream.h	Tue Aug 16 22:34:31 2005
--- xpdf-3.01/xpdf/Stream.h	Tue Jan 17 17:19:54 2006
***************
*** 232,237 ****
--- 232,239 ----
  
    ~StreamPredictor();
  
+   GBool isOk() { return ok; }
+ 
    int lookChar();
    int getChar();
  
***************
*** 249,254 ****
--- 251,257 ----
    int rowBytes;			// bytes per line
    Guchar *predLine;		// line buffer
    int predIdx;			// current index in predLine
+   GBool ok;
  };
  
  //------------------------------------------------------------------------
***************
*** 527,533 ****
    short getWhiteCode();
    short getBlackCode();
    short lookBits(int n);
!   void eatBits(int n) { inputBits -= n; }
  };
  
  //------------------------------------------------------------------------
--- 530,536 ----
    short getWhiteCode();
    short getBlackCode();
    short lookBits(int n);
!   void eatBits(int n) { if ((inputBits -= n) < 0) inputBits = 0; }
  };
  
  //------------------------------------------------------------------------
diff -cr xpdf-3.01.orig/splash/SplashXPathScanner.cc xpdf-3.01/splash/SplashXPathScanner.cc
*** xpdf-3.01.orig/splash/SplashXPathScanner.cc	Tue Aug 16 22:34:31 2005
--- xpdf-3.01/splash/SplashXPathScanner.cc	Wed Feb  1 17:01:14 2006
***************
*** 186,192 ****
  }
  
  void SplashXPathScanner::computeIntersections(int y) {
!   SplashCoord ySegMin, ySegMax, xx0, xx1;
    SplashXPathSeg *seg;
    int i, j;
  
--- 186,192 ----
  }
  
  void SplashXPathScanner::computeIntersections(int y) {
!   SplashCoord xSegMin, xSegMax, ySegMin, ySegMax, xx0, xx1;
    SplashXPathSeg *seg;
    int i, j;
  
***************
*** 236,254 ****
      } else if (seg->flags & splashXPathVert) {
        xx0 = xx1 = seg->x0;
      } else {
!       if (ySegMin <= y) {
! 	// intersection with top edge
! 	xx0 = seg->x0 + ((SplashCoord)y - seg->y0) * seg->dxdy;
        } else {
! 	// x coord of segment endpoint with min y coord
! 	xx0 = (seg->flags & splashXPathFlip) ? seg->x1 : seg->x0;
        }
!       if (ySegMax >= y + 1) {
! 	// intersection with bottom edge
! 	xx1 = seg->x0 + ((SplashCoord)y + 1 - seg->y0) * seg->dxdy;
!       } else {
! 	// x coord of segment endpoint with max y coord
! 	xx1 = (seg->flags & splashXPathFlip) ? seg->x0 : seg->x1;
        }
      }
      if (xx0 < xx1) {
--- 236,262 ----
      } else if (seg->flags & splashXPathVert) {
        xx0 = xx1 = seg->x0;
      } else {
!       if (seg->x0 < seg->x1) {
! 	xSegMin = seg->x0;
! 	xSegMax = seg->x1;
        } else {
! 	xSegMin = seg->x1;
! 	xSegMax = seg->x0;
        }
!       // intersection with top edge
!       xx0 = seg->x0 + ((SplashCoord)y - seg->y0) * seg->dxdy;
!       // intersection with bottom edge
!       xx1 = seg->x0 + ((SplashCoord)y + 1 - seg->y0) * seg->dxdy;
!       // the segment may not actually extend to the top and/or bottom edges
!       if (xx0 < xSegMin) {
! 	xx0 = xSegMin;
!       } else if (xx0 > xSegMax) {
! 	xx0 = xSegMax;
!       }
!       if (xx1 < xSegMin) {
! 	xx1 = xSegMin;
!       } else if (xx1 > xSegMax) {
! 	xx1 = xSegMax;
        }
      }
      if (xx0 < xx1) {