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[bdf] Fix up user properties. 

Fallout reported as
  https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=40027

* src/bdf/bdflib.c (_bdf_add_property): Cosmetic NULL.
(bdf_create_property): Limit allocations to customary signed
FT_Long and NULL-initialize unused storage.
(bdf_free_font): Do not free unused storage.
This commit is contained in:
Alexei Podtelezhnikov 2021-10-16 23:02:47 -04:00
parent afd1cb2881
commit 30ca63d4fb
1 changed files with 5 additions and 8 deletions
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13
src/bdf/bdflib.c
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@ -852,7 +852,7 @@
p = font->user_props + font->nuser_props;
n = ft_strlen( name ) + 1;
if ( n > FT_ULONG_MAX )
if ( n > FT_LONG_MAX )
return FT_THROW( Invalid_Argument );
if ( FT_QALLOC( p->name, n ) )
@ -860,8 +860,9 @@
FT_MEM_COPY( (char *)p->name, name, n );
p->format = format;
p->builtin = 0;
p->format = format;
p->builtin = 0;
p->value.atom = NULL; /* nothing is ever stored here */
n = _num_bdf_properties + font->nuser_props;
@ -1181,7 +1182,7 @@
switch ( prop->format )
{
case BDF_ATOM:
fp->value.atom = 0;
fp->value.atom = NULL;
if ( value && value[0] )
{
if ( FT_STRDUP( fp->value.atom, value ) )
@ -2351,11 +2352,7 @@
/* Free up the user defined properties. */
for ( prop = font->user_props, i = 0;
i < font->nuser_props; i++, prop++ )
{
FT_FREE( prop->name );
if ( prop->format == BDF_ATOM )
FT_FREE( prop->value.atom );
}
FT_FREE( font->user_props );