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$NetBSD: patch-CVE-2011-1167,v 1.1 2011/03/31 11:08:29 drochner Exp $
--- frmts/gtiff/libtiff/tif_thunder.c.orig 2011-01-14 05:19:04.000000000 +0000
+++ frmts/gtiff/libtiff/tif_thunder.c
@@ -25,6 +25,7 @@
*/
#include "tiffiop.h"
+#include <assert.h>
#ifdef THUNDER_SUPPORT
/*
* TIFF Library.
@@ -55,15 +56,35 @@
static const int twobitdeltas[4] = { 0, 1, 0, -1 };
static const int threebitdeltas[8] = { 0, 1, 2, 3, 0, -3, -2, -1 };
-#define SETPIXEL(op, v) { \
- lastpixel = (v) & 0xf; \
- if (npixels++ & 1) \
- *op++ |= lastpixel; \
- else \
- op[0] = (uint8) (lastpixel << 4); \
+#define SETPIXEL(op, v) { \
+ lastpixel = (v) & 0xf; \
+ if ( npixels < maxpixels ) \
+ { \
+ if (npixels++ & 1) \
+ *op++ |= lastpixel; \
+ else \
+ op[0] = (uint8) (lastpixel << 4); \
+ } \
}
static int
+ThunderSetupDecode(TIFF* tif)
+{
+ static const char module[] = "ThunderSetupDecode";
+
+ if( tif->tif_dir.td_bitspersample != 4 )
+ {
+ TIFFErrorExt(tif->tif_clientdata, module,
+ "Wrong bitspersample value (%d), Thunder decoder only supports 4bits per sample.",
+ (int) tif->tif_dir.td_bitspersample );
+ return 0;
+ }
+
+
+ return (1);
+ }
+
+static int
ThunderDecode(TIFF* tif, uint8* op, tmsize_t maxpixels)
{
static const char module[] = "ThunderDecode";
@@ -160,7 +181,8 @@ ThunderDecodeRow(TIFF* tif, uint8* buf,
occ -= tif->tif_scanlinesize;
row += tif->tif_scanlinesize;
}
- return (1);
+
+ return (1);
}
int
@@ -169,6 +191,7 @@ TIFFInitThunderScan(TIFF* tif, int schem
(void) scheme;
tif->tif_decoderow = ThunderDecodeRow;
tif->tif_decodestrip = ThunderDecodeRow;
+ tif->tif_setupdecode = ThunderSetupDecode;
return (1);
}
#endif /* THUNDER_SUPPORT */
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