bugThe FreeType Project - Bugs: bug #46344, FreeType 2.6.1 TrueType parsing...

 
 

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bug #46344: FreeType 2.6.1 TrueType parsing infinite recursion in "tt_sbit_decoder_load_image"

Submitter:  Mateusz Jurczyk <j00ru>
Submitted:  Sat 31 Oct 2015 10:42:57 AM UTC
   
 
Severity:  3 - Normal Item Group:  Crash
Status:  Fixed Privacy:  Public
Assigned to:  wl Open/Closed:  Closed
Planned Release:  2.6.2

Sat 31 Oct 2015 04:54:22 PM UTC, comment #1: 

Fixed in git, thanks for the report.

 Werner LEMBERG <wl>
Group administrator
Sat 31 Oct 2015 10:42:57 AM UTC, original submission:  

The following infinite recursion crash has been encountered in FreeType while fuzzing TrueType fonts. It has been reproduced with the current version of freetype2 from master git branch, with a 64-bit build of the ftbench utility compiled with AddressSanitizer:

$ ftbench <file>

Attached are three POC files which trigger the condition.

---
$ freetype2-demos/bin/ftbench asan_asan-generic_425748_1066_a17e16dca35991b942435605b21b4843

ftbench results for font `asan_asan-generic_425748_1066_a17e16dca35991b942435605b21b4843'
-----------------------------------------------------------------------------------------

family: (null)
 style: (null)

number of seconds for each test: 2.000000

starting glyph index: 0
face size: 10ppem
font preloading into memory: no

load flags: 0x0
render mode: 0

CFF engine set to Adobe
TrueType engine set to version 35
maximum cache size: 1024KiByte

executing tests:
  Load                      ASAN:DEADLYSIGNAL
=================================================================
==18134==ERROR: AddressSanitizer: stack-overflow on address 0x7fff16618ea8 (pc 0x0000004b8902 bp 0x7fff166196f0 sp 0x7fff16618e80 T0)
    #0 0x4b8901 in malloc llvm/projects/compiler-rt/lib/asan/asan_malloc_linux.cc:39
    #1 0x74fa60 in ft_alloc freetype2/src/base/ftsystem.c:74:12
    #2 0x517ac7 in ft_mem_qalloc freetype2/src/base/ftutil.c:76:15
    #3 0x517191 in FT_Stream_EnterFrame freetype2/src/base/ftstream.c:269:12
    #4 0x516de0 in FT_Stream_ExtractFrame freetype2/src/base/ftstream.c:200:13
    #5 0x698eb4 in tt_sbit_decoder_load_bitmap freetype2/src/sfnt/ttsbit.c:1018:10
    #6 0x6973f6 in tt_sbit_decoder_load_image freetype2/src/sfnt/ttsbit.c:1315:12
    #7 0x69b0d3 in tt_sbit_decoder_load_compound freetype2/src/sfnt/ttsbit.c:922:15
    #8 0x699416 in tt_sbit_decoder_load_bitmap freetype2/src/sfnt/ttsbit.c:1127:15
    #9 0x6973f6 in tt_sbit_decoder_load_image freetype2/src/sfnt/ttsbit.c:1315:12
    #10 0x69b0d3 in tt_sbit_decoder_load_compound freetype2/src/sfnt/ttsbit.c:922:15
    #11 0x699416 in tt_sbit_decoder_load_bitmap freetype2/src/sfnt/ttsbit.c:1127:15
    #12 0x6973f6 in tt_sbit_decoder_load_image freetype2/src/sfnt/ttsbit.c:1315:12
    #13 0x69b0d3 in tt_sbit_decoder_load_compound freetype2/src/sfnt/ttsbit.c:922:15
    #14 0x699416 in tt_sbit_decoder_load_bitmap freetype2/src/sfnt/ttsbit.c:1127:15
    #15 0x6973f6 in tt_sbit_decoder_load_image freetype2/src/sfnt/ttsbit.c:1315:12
    #16 0x69b0d3 in tt_sbit_decoder_load_compound freetype2/src/sfnt/ttsbit.c:922:15
    #17 0x699416 in tt_sbit_decoder_load_bitmap freetype2/src/sfnt/ttsbit.c:1127:15
    #18 0x6973f6 in tt_sbit_decoder_load_image freetype2/src/sfnt/ttsbit.c:1315:12
    #19 0x69b0d3 in tt_sbit_decoder_load_compound freetype2/src/sfnt/ttsbit.c:922:15
    #20 0x699416 in tt_sbit_decoder_load_bitmap freetype2/src/sfnt/ttsbit.c:1127:15
    #21 0x6973f6 in tt_sbit_decoder_load_image freetype2/src/sfnt/ttsbit.c:1315:12
    #22 0x69b0d3 in tt_sbit_decoder_load_compound freetype2/src/sfnt/ttsbit.c:922:15
    #23 0x699416 in tt_sbit_decoder_load_bitmap freetype2/src/sfnt/ttsbit.c:1127:15
    #24 0x6973f6 in tt_sbit_decoder_load_image freetype2/src/sfnt/ttsbit.c:1315:12
    #25 0x69b0d3 in tt_sbit_decoder_load_compound freetype2/src/sfnt/ttsbit.c:922:15
    [...]

SUMMARY: AddressSanitizer: stack-overflow llvm/projects/compiler-rt/lib/asan/asan_malloc_linux.cc:39 in malloc
==18134==ABORTING
---

 Mateusz Jurczyk <j00ru>
Group Member

 

(Note: upload size limit is set to 16384 kB, after insertion of the required escape characters.)

Attached Files
file #35342:  asan_asan-generic_425748_1066_a17e16dca35991b942435605b21b4843 added by j00ru (6KiB - application/octet-stream)
file #35343:  asan_asan-generic_42578c_4314_a501f0982ee811d85c3ea819c70a6a38 added by j00ru (2KiB - application/octet-stream)
file #35344:  asan_asan-generic_53dd57_1066_e42320b0973225ca9f7d996f7ff26780 added by j00ru (6KiB - application/octet-stream)

 

Depends on the following items: None found

Items that depend on this one: None found

 

Carbon-Copy List
  • -email is unavailable- added by wl (Posted a comment)
  • -email is unavailable- added by j00ru (Submitted the item)

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    Follow 8 latest changes.

    Date Changed by Updated Field Previous Value => Replaced by
    2015-10-31 wl StatusNone Fixed
        PrivacyPrivate Public
        Assigned toNone wl
        Open/ClosedOpen Closed
        Planned ReleaseNone 2.6.2
    2015-10-31 j00ru Attached File- Added asan_asan-generic_425748_1066_a17e16dca35991b942435605b21b4843, #35342
        Attached File- Added asan_asan-generic_42578c_4314_a501f0982ee811d85c3ea819c70a6a38, #35343
        Attached File- Added asan_asan-generic_53dd57_1066_e42320b0973225ca9f7d996f7ff26780, #35344

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