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* src/cid/cidload.c (cid_face_open): Streamline SubrCount check.

This commit is contained in:
Alexei Podtelezhnikov 2021-10-07 22:44:53 -04:00
parent 0313a11c4c
commit 946df22165
1 changed files with 4 additions and 5 deletions
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9
src/cid/cidload.c
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@ -902,11 +902,10 @@
goto Exit; goto Exit;
} }
/* `num_subrs' is scanned as a signed integer */ /* The first condition prevents the multiplication overflow */
if ( (FT_Int)dict->num_subrs < 0 || if ( dict->num_subrs > UINT_MAX / 4 ||
( dict->sd_bytes && dict->num_subrs * dict->sd_bytes >
dict->num_subrs > ( binary_length - dict->subrmap_offset ) / binary_length - dict->subrmap_offset )
dict->sd_bytes ) )
{ {
FT_ERROR(( "cid_face_open: Invalid `SubrCount' value\n" )); FT_ERROR(( "cid_face_open: Invalid `SubrCount' value\n" ));
error = FT_THROW( Invalid_File_Format ); error = FT_THROW( Invalid_File_Format );