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[cff] Integer overflows. 

Reported as

  https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=2200
  https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=2210

* src/cff/cf2hints.c (cf2_hintmap_insertHint): Use SUB_INT32 and
ADD_INT32.

* src/cff/cf2intrp.c (cf2_interpT2CharString) <cf2_cmdVMOVETO>: Use
ADD_INT32.
This commit is contained in:
Werner Lemberg 2017-06-11 13:50:37 +02:00
parent 5f2a72cbc7
commit 3ed3a96181
3 changed files with 20 additions and 4 deletions
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15
ChangeLog
View File

@ -1,3 +1,18 @@
2017-06-11 Werner Lemberg <wl@gnu.org>
[cff] Integer overflows.
Reported as
https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=2200
https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=2210
* src/cff/cf2hints.c (cf2_hintmap_insertHint): Use SUB_INT32 and
ADD_INT32.
* src/cff/cf2intrp.c (cf2_interpT2CharString) <cf2_cmdVMOVETO>: Use
ADD_INT32.
2017-06-10 Werner Lemberg <wl@gnu.org>
[truetype] Fix TT_Set_Var_Design.

6
src/cff/cf2hints.c
View File

@ -651,8 +651,8 @@
hintmap->scale );
firstHintEdge->dsCoord = midpoint - halfWidth;
secondHintEdge->dsCoord = midpoint + halfWidth;
firstHintEdge->dsCoord = SUB_INT32( midpoint, halfWidth );
secondHintEdge->dsCoord = ADD_INT32( midpoint, halfWidth );
}
else
firstHintEdge->dsCoord = cf2_hintmap_map( hintmap->initialHintMap,
@ -721,7 +721,7 @@
/* insert first edge */
hintmap->edge[indexInsert] = *firstHintEdge; /* copy struct */
hintmap->count += 1;
hintmap->count += 1;
if ( isPair )
{

3
src/cff/cf2intrp.c
View File

@ -768,7 +768,8 @@
FT_TRACE4(( " vmoveto\n" ));
if ( cf2_stack_count( opStack ) > 1 && !haveWidth )
*width = cf2_stack_getReal( opStack, 0 ) + nominalWidthX;
*width = ADD_INT32( cf2_stack_getReal( opStack, 0 ),
nominalWidthX );
/* width is defined or default after this */
haveWidth = TRUE;