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[cff] Fix heap buffer overflow (#49858). 

* src/cff/cffparse.c (cff_parser_run): Add one more stack size
check.
This commit is contained in:
Werner Lemberg 2016-12-16 08:52:03 +01:00
parent 01658be6fb
commit beecf80a6d
2 changed files with 14 additions and 3 deletions
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7
ChangeLog
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@ -1,3 +1,10 @@
2016-12-16 Werner Lemberg <wl@gnu.org>
[cff] Fix heap buffer overflow (#49858).
* src/cff/cffparse.c (cff_parser_run): Add one more stack size
check.
2016-12-15 Werner Lemberg <wl@gnu.org>
Fix clang warnings.

10
src/cff/cffparse.c
View File

@ -1422,13 +1422,17 @@
/* and look for it in our current list. */
FT_UInt code;
FT_UInt num_args = (FT_UInt)
( parser->top - parser->stack );
FT_UInt num_args;
const CFF_Field_Handler* field;
if ( (FT_UInt)( parser->top - parser->stack ) >= parser->stackSize )
goto Stack_Overflow;
num_args = (FT_UInt)( parser->top - parser->stack );
*parser->top = p;
code = v;
code = v;
if ( v == 12 )
{
/* two byte operator */