587742 - Malformed cmap table in TT font leads to crash [@TcmapUnicodeTable::GetSubtable]

Status: RESOLVED FIXED

(Core :: Graphics, defect)

Description

[Christoph Diehl [:posidron]]

Attachment: testccase

Tag: b'cmap' Checksum: 0x0000d510 Offset: 300/0x0000012c Length: 768

Table: b'cmap'
Number of replaced values: 4
Offset:   2/0x000002 Value: ['ff', 'c4', '40', '0f']
Offset:   7/0x000007 Value: ['7f', 'ff', 'ff', 'ff']
Offset: 216/0x0000d8 Value: ['80', '00']
Offset: 486/0x0001e6 Value: ['00', '00', '00', '00', '00', '00', '00', '01']

Note: FontBook is affected to.

Comment 1

[Christoph Diehl [:posidron]]

Attachment: callstack

Comment 2

[Christoph Diehl [:posidron]]

Attachment: callstack-fontbook

Comment 3

[Jonathan Kew [:jfkthame]]

This will be fixed by the OTS sanitizer (bug 527276).

Comment 4

[Al Billings [:abillings - ex-MoCo]]

Verified fixed in 1.9.2.13 with Mozilla/5.0 (Macintosh; U; Intel Mac OS X 10.6;
en-US; rv:1.9.2.13pre) Gecko/20101118 Namoroka/3.6.13pre using testcase. Test
no longer crashes as it does in 1.9.2.12.