264f307e66
include/freetype/internal/ftmemory.h, src/base/ftdbgmem.c,
src/base/ftutil.c: udpating the memory management functions and
macros to safely deal with array size buffer overflows, this
corresponds to attemps to allocate arrays that are too large. For
an example, consider the following code:
count = read_uint32_from_file();
array = malloc( sizeof(Item) * count );
for ( nn = 0; nn < count; nn++ )
array[nn] = read_item_from_file();
if 'count' is larger than FT_UINT_MAX/sizeof(Item), the multiplication
will overflow and the array allocated will be smaller than the data
read from the file. In this case, the heap will be trashed, and this
can be used as a denial-of-service, or make the engine crash later.
the FT_ARRAY_NEW and FT_ARRAY_RENEW macro now check that the new
count is no more than FT_INT_MAX/item_size, otherwise, a new error,
named 'FT_Err_Array_Too_Large' will be returned.
note that the memory debugger now works again when FT_DEBUG_MEMORY
is defined, and FT_STRICT_ALIASING has disappeared, the corresponding
code being now the default.
|
||
|---|---|---|
| builds | ||
| devel | ||
| docs | ||
| include | ||
| objs | ||
| src | ||
| .cvsignore | ||
| ChangeLog | ||
| ChangeLog.20 | ||
| ChangeLog.21 | ||
| Jamfile | ||
| Jamrules | ||
| Makefile | ||
| README | ||
| README.CVS | ||
| autogen.sh | ||
| configure | ||
| modules.cfg | ||
| vms_make.com | ||
README
Special notes to Unix users
===========================
Please read the file `docs/UPGRADE.UNX'. It contains important
information regarding the installation of FreeType on Unix systems,
especially GNU based operating systems like GNU/Linux.
FreeType 2's library is called `libfreetype', FreeType 1's library
is called `libttf'. They are *not* compatible!
FreeType 2.2
============
Please read the docs/CHANGES file, it contains IMPORTANT
INFORMATION.
Read the files `docs/INSTALL' for installation instructions.
Note that the FreeType 2 documentation (together with signature
files) is now available as a separate package from our sites. Go to
http://download.savannah.gnu.org/releases/freetype/
and download one of the following files.
freetype-doc-2.2.tar.bz2
freetype-doc-2.2.tar.gz
ftdoc22.zip
Bugs
====
Please report bugs by e-mail to `freetype-devel@nongnu.org'. Don't
forget to send a detailed explanation of the problem -- there is
nothing worse than receiving a terse message that only says `it
doesn't work'.
Alternatively, you may submit a bug report at
https://savannah.nongnu.org/bugs/?group=freetype
Enjoy!
The FreeType Team
----------------------------------------------------------------------
Copyright 2001, 2002, 2003, 2004, 2006 by
David Turner, Robert Wilhelm, and Werner Lemberg.
This file is part of the FreeType project, and may only be used,
modified, and distributed under the terms of the FreeType project
license, LICENSE.TXT. By continuing to use, modify, or distribute
this file you indicate that you have read the license and understand
and accept it fully.
--- end of README ---