mirror of
https://git.in.rschanz.org/ryan77627/guix.git
synced 2024-11-16 03:45:24 -05:00
68 lines
2.9 KiB
Diff
68 lines
2.9 KiB
Diff
|
Fix an integer overflow in TIFFReadEncodedStrip() that led to division-by-zero:
|
||
|
|
|
||
|
|
http://bugzilla.maptools.org/show_bug.cgi?id=2596
|
||
|
|
|
||
|
|
2016-12-02 Even Rouault <even.rouault at spatialys.com>
|
||
|
|
|
||
|
|
* libtiff/tif_read.c, libtiff/tiffiop.h: fix uint32 overflow in
|
||
|
|
TIFFReadEncodedStrip() that caused an integer division by zero.
|
||
|
|
Reported by Agostino Sarubbo.
|
||
|
|
Fixes http://bugzilla.maptools.org/show_bug.cgi?id=2596
|
||
|
|
|
||
|
|
|
||
|
|
/cvs/maptools/cvsroot/libtiff/ChangeLog,v <-- ChangeLog
|
||
|
|
new revision: 1.1173; previous revision: 1.1172
|
||
|
|
/cvs/maptools/cvsroot/libtiff/libtiff/tif_read.c,v <-- libtiff/tif_read.c
|
||
|
|
new revision: 1.50; previous revision: 1.49
|
||
|
|
/cvs/maptools/cvsroot/libtiff/libtiff/tiffiop.h,v <-- libtiff/tiffiop.h
|
||
|
|
new revision: 1.90; previous revision: 1.89
|
||
|
|
|
||
|
|
Index: libtiff/libtiff/tif_read.c
|
||
|
|
===================================================================
|
||
|
|
RCS file: /cvs/maptools/cvsroot/libtiff/libtiff/tif_read.c,v
|
||
|
|
retrieving revision 1.49
|
||
|
|
retrieving revision 1.50
|
||
|
|
diff -u -r1.49 -r1.50
|
||
|
|
--- libtiff/libtiff/tif_read.c 10 Jul 2016 18:00:21 -0000 1.49
|
||
|
|
+++ libtiff/libtiff/tif_read.c 2 Dec 2016 21:56:56 -0000 1.50
|
||
|
|
@@ -1,4 +1,4 @@
|
||
|
|
-/* $Id: tif_read.c,v 1.49 2016-07-10 18:00:21 erouault Exp $ */
|
||
|
|
+/* $Id: tif_read.c,v 1.50 2016-12-02 21:56:56 erouault Exp $ */
|
||
|
|
|
||
|
|
/*
|
||
|
|
* Copyright (c) 1988-1997 Sam Leffler
|
||
|
|
@@ -346,7 +346,7 @@
|
||
|
|
rowsperstrip=td->td_rowsperstrip;
|
||
|
|
if (rowsperstrip>td->td_imagelength)
|
||
|
|
rowsperstrip=td->td_imagelength;
|
||
|
|
- stripsperplane=((td->td_imagelength+rowsperstrip-1)/rowsperstrip);
|
||
|
|
+ stripsperplane= TIFFhowmany_32_maxuint_compat(td->td_imagelength, rowsperstrip);
|
||
|
|
stripinplane=(strip%stripsperplane);
|
||
|
|
plane=(uint16)(strip/stripsperplane);
|
||
|
|
rows=td->td_imagelength-stripinplane*rowsperstrip;
|
||
|
|
Index: libtiff/libtiff/tiffiop.h
|
||
|
|
===================================================================
|
||
|
|
RCS file: /cvs/maptools/cvsroot/libtiff/libtiff/tiffiop.h,v
|
||
|
|
retrieving revision 1.89
|
||
|
|
retrieving revision 1.90
|
||
|
|
diff -u -r1.89 -r1.90
|
||
|
|
--- libtiff/libtiff/tiffiop.h 23 Jan 2016 21:20:34 -0000 1.89
|
||
|
|
+++ libtiff/libtiff/tiffiop.h 2 Dec 2016 21:56:56 -0000 1.90
|
||
|
|
@@ -1,4 +1,4 @@
|
||
|
|
-/* $Id: tiffiop.h,v 1.89 2016-01-23 21:20:34 erouault Exp $ */
|
||
|
|
+/* $Id: tiffiop.h,v 1.90 2016-12-02 21:56:56 erouault Exp $ */
|
||
|
|
|
||
|
|
/*
|
||
|
|
* Copyright (c) 1988-1997 Sam Leffler
|
||
|
|
@@ -250,6 +250,10 @@
|
||
|
|
#define TIFFhowmany_32(x, y) (((uint32)x < (0xffffffff - (uint32)(y-1))) ? \
|
||
|
|
((((uint32)(x))+(((uint32)(y))-1))/((uint32)(y))) : \
|
||
|
|
0U)
|
||
|
|
+/* Variant of TIFFhowmany_32() that doesn't return 0 if x close to MAXUINT. */
|
||
|
|
+/* Caution: TIFFhowmany_32_maxuint_compat(x,y)*y might overflow */
|
||
|
|
+#define TIFFhowmany_32_maxuint_compat(x, y) \
|
||
|
|
+ (((uint32)(x) / (uint32)(y)) + ((((uint32)(x) % (uint32)(y)) != 0) ? 1 : 0))
|
||
|
|
#define TIFFhowmany8_32(x) (((x)&0x07)?((uint32)(x)>>3)+1:(uint32)(x)>>3)
|
||
|
|
#define TIFFroundup_32(x, y) (TIFFhowmany_32(x,y)*(y))
|
||
|
|
#define TIFFhowmany_64(x, y) ((((uint64)(x))+(((uint64)(y))-1))/((uint64)(y)))
|