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Fix Savannah bug #43539. 

* src/base/ftobjs.c (Mac_Read_POST_Resource): Fix integer overflow
by a broken POST table in resource-fork.
This commit is contained in:
suzuki toshiya 2014-11-26 15:52:23 +09:00
parent 240c94a185
commit 35252ae9aa
2 changed files with 24 additions and 0 deletions
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7
ChangeLog
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@ -1,3 +1,10 @@
2014-11-26 suzuki toshiya <mpsuzuki@hiroshima-u.ac.jp>
Fix Savannah bug #43539.
* src/base/ftobjs.c (Mac_Read_POST_Resource): Fix integer overflow
by a broken POST table in resource-fork.
2014-11-26 suzuki toshiya <mpsuzuki@hiroshima-u.ac.jp>
Fix Savannah bug #43538.

17
src/base/ftobjs.c
View File

@ -1617,6 +1617,11 @@
goto Exit2;
if ( FT_READ_LONG( rlen ) )
goto Exit2;
if ( rlen < 0 )
{
error = FT_THROW( Invalid_Offset );
goto Exit2;
}
if ( FT_READ_USHORT( flags ) )
goto Exit2;
FT_TRACE3(( "POST fragment[%d]: offsets=0x%08x, rlen=0x%08x, flags=0x%04x\n",
@ -1634,7 +1639,14 @@
rlen = 0;
if ( ( flags >> 8 ) == type )
{
if ( 0x7FFFFFFFL - rlen < len )
{
error = FT_THROW( Array_Too_Large );
goto Exit2;
}
len += rlen;
}
else
{
if ( pfb_lenpos + 3 > pfb_len + 2 )
@ -1663,6 +1675,11 @@
}
error = FT_ERR( Cannot_Open_Resource );
if ( rlen > 0x7FFFFFFFL - pfb_pos )
{
error = FT_THROW( Array_Too_Large );
goto Exit2;
}
if ( pfb_pos > pfb_len || pfb_pos + rlen > pfb_len )
goto Exit2;