70 lines
2.5 KiB
Diff
70 lines
2.5 KiB
Diff
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diff -urN tiff-4.0.1/libtiff/tif_getimage.c tiff-4.0.1.new/libtiff/tif_getimage.c
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--- tiff-4.0.1/libtiff/tif_getimage.c 2011-02-25 04:34:02.000000000 +0100
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+++ tiff-4.0.1.new/libtiff/tif_getimage.c 2012-04-20 13:27:50.109802168 +0200
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@@ -692,6 +692,7 @@
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unsigned char* p2;
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unsigned char* pa;
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tmsize_t tilesize;
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+ tmsize_t bufsize;
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int32 fromskew, toskew;
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int alpha = img->alpha;
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uint32 nrow;
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@@ -699,12 +700,17 @@
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int colorchannels;
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tilesize = TIFFTileSize(tif);
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- buf = (unsigned char*) _TIFFmalloc((alpha?4:3)*tilesize);
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+ bufsize = TIFFSafeMultiply(tmsize_t,alpha?4:3,tilesize);
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+ if (bufsize == 0) {
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+ TIFFErrorExt(tif->tif_clientdata, TIFFFileName(tif), "Integer overflow in %s", "gtTileSeparate");
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+ return (0);
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+ }
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+ buf = (unsigned char*) _TIFFmalloc(bufsize);
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if (buf == 0) {
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TIFFErrorExt(tif->tif_clientdata, TIFFFileName(tif), "%s", "No space for tile buffer");
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return (0);
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}
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- _TIFFmemset(buf, 0, (alpha?4:3)*tilesize);
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+ _TIFFmemset(buf, 0, bufsize);
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p0 = buf;
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p1 = p0 + tilesize;
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p2 = p1 + tilesize;
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@@ -917,17 +923,23 @@
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uint32 rowsperstrip, offset_row;
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uint32 imagewidth = img->width;
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tmsize_t stripsize;
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+ tmsize_t bufsize;
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int32 fromskew, toskew;
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int alpha = img->alpha;
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int ret = 1, flip, colorchannels;
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stripsize = TIFFStripSize(tif);
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- p0 = buf = (unsigned char *)_TIFFmalloc((alpha?4:3)*stripsize);
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+ bufsize = TIFFSafeMultiply(tmsize_t,alpha?4:3,stripsize);
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+ if (bufsize == 0) {
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+ TIFFErrorExt(tif->tif_clientdata, TIFFFileName(tif), "Integer overflow in %s", "gtStripSeparate");
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+ return (0);
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+ }
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+ p0 = buf = (unsigned char *)_TIFFmalloc(bufsize);
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if (buf == 0) {
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TIFFErrorExt(tif->tif_clientdata, TIFFFileName(tif), "No space for tile buffer");
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return (0);
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}
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- _TIFFmemset(buf, 0, (alpha?4:3)*stripsize);
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+ _TIFFmemset(buf, 0, bufsize);
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p1 = p0 + stripsize;
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p2 = p1 + stripsize;
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pa = (alpha?(p2+stripsize):NULL);
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diff -urN tiff-4.0.1/libtiff/tiffiop.h tiff-4.0.1.new/libtiff/tiffiop.h
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--- tiff-4.0.1/libtiff/tiffiop.h 2011-02-19 17:26:09.000000000 +0100
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+++ tiff-4.0.1.new/libtiff/tiffiop.h 2012-04-20 13:27:50.109802168 +0200
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@@ -250,7 +250,7 @@
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#define TIFFroundup_64(x, y) (TIFFhowmany_64(x,y)*(y))
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/* Safe multiply which returns zero if there is an integer overflow */
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-#define TIFFSafeMultiply(t,v,m) ((((t)m != (t)0) && (((t)((v*m)/m)) == (t)v)) ? (t)(v*m) : (t)0)
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+#define TIFFSafeMultiply(t,v,m) ((((t)(m) != (t)0) && (((t)(((v)*(m))/(m))) == (t)(v))) ? (t)((v)*(m)) : (t)0)
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#define TIFFmax(A,B) ((A)>(B)?(A):(B))
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#define TIFFmin(A,B) ((A)<(B)?(A):(B))
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