diff options
Diffstat (limited to 'src/truetype')
| -rw-r--r-- | src/truetype/ttpload.c | 20 |
1 files changed, 20 insertions, 0 deletions
diff --git a/src/truetype/ttpload.c b/src/truetype/ttpload.c index a311b03c..c5317335 100644 --- a/src/truetype/ttpload.c +++ b/src/truetype/ttpload.c @@ -203,6 +203,26 @@ } } + /* Check broken location data */ + if ( pos1 >= face->glyf_len ) + { + FT_TRACE1(( "tt_face_get_location:" + " too large offset=0x%08lx found for gid=0x%04lx," + " exceeding the end of glyf table (0x%08lx)\n", + pos1, gindex, face->glyf_len )); + *asize = 0; + return 0; + } + + if ( pos2 >= face->glyf_len ) + { + FT_TRACE1(( "tt_face_get_location:" + " too large offset=0x%08lx found for gid=0x%04lx," + " truncate at the end of glyf table (0x%08lx)\n", + pos2, gindex + 1, face->glyf_len )); + pos2 = face->glyf_len; + } + /* The `loca' table must be ordered; it refers to the length of */ /* an entry as the difference between the current and the next */ /* position. However, there do exist (malformed) fonts which */ |