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[devel] Avoid a possible NULL dereference in debug builds

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in png_set_text-2().  Bug discovered by Evan Rouault, using cochinelle.
This commit is contained in:
Glenn Randers-Pehrson 2009-07-27 22:08:25 -05:00
parent 78389d8396
commit e2a118f81a
7 changed files with 12 additions and 9 deletions
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5
ANNOUNCE
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@ -1,5 +1,5 @@
Libpng 1.4.0beta70 - July 25, 2009
Libpng 1.4.0beta70 - July 28, 2009
This is not intended to be a public release. It will be replaced
within a few weeks by a public version or by another test version.
@ -510,7 +510,8 @@ version 1.4.0beta69 [July 25, 2009]
Fixed up xcode project (Alam Arias)
Declared internal png_64bit_product() static.
version 1.4.0beta70 [July 25, 2009]
version 1.4.0beta70 [July 28, 2009]
Avoid a possible NULL dereference in debug build, in png_set_text_2().
version 1.4.0betaN [future]
Build shared libraries with -lz and sometimes -lm.

3
CHANGES
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@ -2189,7 +2189,8 @@ version 1.4.0beta69 [July 25, 2009]
Fixed up xcode project (Alam Arias)
Added a prototype for png_64bit_product() in png.c
version 1.4.0beta70 [July 25, 2009]
version 1.4.0beta70 [July 28, 2009]
Avoid a possible NULL dereference in debug build, in png_set_text_2().
version 1.4.0betaN [future]
Build shared libraries with -lz and sometimes -lm.

2
pngpread.c
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@ -1,7 +1,7 @@
/* pngpread.c - read a png file in push mode
*
* Last changed in libpng 1.4.0 [July 25, 2009]
* Last changed in libpng 1.4.0 [July 28, 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.)

2
pngread.c
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@ -1,7 +1,7 @@
/* pngread.c - read a PNG file
*
* Last changed in libpng 1.4.0 [July 25, 2009]
* Last changed in libpng 1.4.0 [July 28, 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.)

2
pngrtran.c
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@ -1,7 +1,7 @@
/* pngrtran.c - transforms the data in a row for PNG readers
*
* Last changed in libpng 1.4.0 [July 25, 2009]
* Last changed in libpng 1.4.0 [July 28, 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.)

5
pngset.c
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@ -1,7 +1,7 @@
/* pngset.c - storage of image information into info struct
*
* Last changed in libpng 1.4.0 [July 25, 2009]
* Last changed in libpng 1.4.0 [July 28, 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.)
@ -713,7 +713,8 @@ png_set_text_2(png_structp png_ptr, png_infop info_ptr, png_textp text_ptr,
{
int i;
png_debug1(1, "in %s storage function", (png_ptr->chunk_name[0] == '\0' ?
png_debug1(1, "in %s storage function", ((png_ptr == NULL ||
png_ptr->chunk_name[0] == '\0') ?
"text" : (png_const_charp)png_ptr->chunk_name));
if (png_ptr == NULL || info_ptr == NULL || num_text == 0)

2
pngwrite.c
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@ -1,7 +1,7 @@
/* pngwrite.c - general routines to write a PNG file
*
* Last changed in libpng 1.4.0 [July 25, 2009]
* Last changed in libpng 1.4.0 [July 28, 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.)