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[master] Add a test to make sure the user isn't trying to stuff height into 

a 16-bit int (assuming height immediately follows width).
This commit is contained in:
Glenn Randers-Pehrson 2009-09-30 13:38:37 -05:00
parent 18bd86f154
commit 3dfd0cd62a
2 changed files with 22 additions and 8 deletions
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15
pngconf.h
View File

@ -1,7 +1,7 @@
/* pngconf.h - machine configurable file for libpng
*
* libpng version 1.2.41beta01 - September 25, 2009
* libpng version 1.2.41beta02 - September 30, 2009
* Copyright (c) 1998-2009 Glenn Randers-Pehrson
* (Version 0.96 Copyright (c) 1996, 1997 Andreas Dilger)
* (Version 0.88 Copyright (c) 1995, 1996 Guy Eric Schalnat, Group 42, Inc.)
@ -787,6 +787,7 @@
#endif
/* end of obsolete code to be removed from libpng-1.4.0 */
/* Added at libpng-1.2.0 */
#if !defined(PNG_1_0_X)
#if !defined(PNG_NO_USER_MEM) && !defined(PNG_USER_MEM_SUPPORTED)
# define PNG_USER_MEM_SUPPORTED
@ -794,12 +795,12 @@
#endif /* PNG_1_0_X */
/* Added at libpng-1.2.6 */
#if !defined(PNG_1_0_X)
#ifndef PNG_SET_USER_LIMITS_SUPPORTED
#if !defined(PNG_NO_SET_USER_LIMITS) && !defined(PNG_SET_USER_LIMITS_SUPPORTED)
# define PNG_SET_USER_LIMITS_SUPPORTED
#endif
#endif
#ifndef PNG_1_0_X
# ifndef PNG_SET_USER_LIMITS_SUPPORTED
# ifndef PNG_NO_SET_USER_LIMITS
# define PNG_SET_USER_LIMITS_SUPPORTED
# endif
# endif
#endif /* PNG_1_0_X */
/* Added at libpng-1.0.16 and 1.2.6. To accept all valid PNGS no matter

15
pngget.c
View File

@ -1,7 +1,7 @@
/* pngget.c - retrieval of values from info struct
*
* Last changed in libpng 1.2.41 [September 25, 2009]
* Last changed in libpng 1.2.41 [September 30, 2009]
* Copyright (c) 1998-2009 Glenn Randers-Pehrson
* (Version 0.96 Copyright (c) 1996, 1997 Andreas Dilger)
* (Version 0.88 Copyright (c) 1995, 1996 Guy Eric Schalnat, Group 42, Inc.)
@ -577,6 +577,19 @@ png_get_IHDR(png_structp png_ptr, png_infop info_ptr,
height == NULL || bit_depth == NULL || color_type == NULL)
return (0);
#ifdef PNG_DEBUG
/* Test to make sure the user isn't trying to stuff height into
* a 16-bit int (assuming height immediately follows width).
*/
*width = 0;
*height = PNG_UINT_31_MAX;
if (*width != 0)
{
png_warning(png_ptr,
"Application's height variable cannot hold a 32-bit value");
}
#endif
*width = info_ptr->width;
*height = info_ptr->height;
*bit_depth = info_ptr->bit_depth;