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[bdf] Fix integer scanning routines. 

Reported as

  https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=2029

* src/bdf/bdflib.c (_bdf_atoul, _bdf_atol, _bdf_atous, _bdf_atos):
Stop scanning if result would overflow.
This commit is contained in:
Werner Lemberg 2017-06-02 09:06:36 +02:00
parent 3802ca8b64
commit 47a03e9b23
2 changed files with 47 additions and 4 deletions
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11
ChangeLog
View File

@ -1,3 +1,14 @@
2017-06-02 Werner Lemberg <wl@gnu.org>
[bdf] Fix integer scanning routines.
Reported as
https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=2029
* src/bdf/bdflib.c (_bdf_atoul, _bdf_atol, _bdf_atous, _bdf_atos):
Stop scanning if result would overflow.
2017-06-02 Werner Lemberg <wl@gnu.org>
[cff] Fix integer overflows.

40
src/bdf/bdflib.c
View File

@ -704,7 +704,15 @@
return 0;
for ( v = 0; sbitset( ddigits, *s ); s++ )
v = v * 10 + a2i[(int)*s];
{
if ( v < ( ULONG_MAX - 9 ) / 10 )
v = v * 10 + a2i[(int)*s];
else
{
v = ULONG_MAX;
break;
}
}
return v;
}
@ -729,7 +737,15 @@
}
for ( v = 0; sbitset( ddigits, *s ); s++ )
v = v * 10 + a2i[(int)*s];
{
if ( v < ( LONG_MAX - 9 ) / 10 )
v = v * 10 + a2i[(int)*s];
else
{
v = LONG_MAX;
break;
}
}
return ( !neg ) ? v : -v;
}
@ -746,7 +762,15 @@
return 0;
for ( v = 0; sbitset( ddigits, *s ); s++ )
v = (unsigned short)( v * 10 + a2i[(int)*s] );
{
if ( v < ( USHRT_MAX - 9 ) / 10 )
v = (unsigned short)( v * 10 + a2i[(int)*s] );
else
{
v = USHRT_MAX;
break;
}
}
return v;
}
@ -771,7 +795,15 @@
}
for ( v = 0; sbitset( ddigits, *s ); s++ )
v = (short)( v * 10 + a2i[(int)*s] );
{
if ( v < ( SHRT_MAX - 9 ) / 10 )
v = (short)( v * 10 + a2i[(int)*s] );
else
{
v = SHRT_MAX;
break;
}
}
return (short)( ( !neg ) ? v : -v );
}