bugThe FreeType Project - Bugs: bug #35657, Out-of-bounds read in...

 
 

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bug #35657: Out-of-bounds read in PS_Conv_Strtol

Submitter:  Mateusz Jurczyk <j00ru>
Submitted:  Tue 28 Feb 2012 10:10:21 AM UTC
   
 
Severity:  3 - Normal Item Group:  Crash
Status:  Fixed Privacy:  Public
Assigned to:  wl Open/Closed:  Closed
Planned Release:  2.4.9

Thu 01 Mar 2012 08:33:04 PM UTC, comment #1: 

Fixed in git, thanks.

 Werner LEMBERG <wl>
Group administrator
Tue 28 Feb 2012 10:10:21 AM UTC, original submission:  

Crash tested with ftbench (current git branch of freetype2 and ft2demos), compiled under Ubuntu amd64 with AddressSanitizer (http://code.google.com/p/address-sanitizer/).

Crashlog from ASAN:

=================================================================
==18885== ERROR: AddressSanitizer heap-buffer-overflow on address 0x7fab358d636d at pc 0x5ade86 bp 0x7ffff8ac4de0 sp 0x7ffff8ac4dd8
READ of size 1 at 0x7fab358d636d thread T0
  #0 0x5ade86 PS_Conv_Strtol
  #1 0x5adc77 PS_Conv_ToInt
  #2 0x5a2c87 ps_parser_to_int
  #3 0x4d847c parse_subrs
  #4 0x4e7c11 t1_load_keyword
  #5 0x4e58ba parse_dict
  #6 0x4e3335 T1_Open_Face
  #7 0x4dc866 T1_Face_Init
  #8 0x491460 open_face
  #9 0x490a23 FT_Open_Face
  #10 0x48fd46 FT_New_Face
  #11 0x487407 get_face
  #12 0x487b61 main
  #13 0x7fab36d39d5d __libc_start_main
0x7fab358d636d is located 1 bytes to the right of 4844-byte region [0x7fab358d5080,0x7fab358d636c)
allocated by thread T0 here:
  #0 0x5c62d2 malloc
  #1 0x4a0ee4 ft_mem_qalloc
  #2 0x48b2bf ft_mem_alloc
  #3 0x4e61bd T1_Get_Private_Dict
  #4 0x4e32b1 T1_Open_Face
  #5 0x4dc866 T1_Face_Init
  #6 0x491460 open_face
  #7 0x490a23 FT_Open_Face
  #8 0x48fd46 FT_New_Face
  #9 0x487407 get_face
  #10 0x487b61 main
  #11 0x7fab36d39d5d __libc_start_main
==18885== ABORTING
Stats: 0M malloced (0M for red zones) by 756 calls
Stats: 0M realloced by 0 calls
Stats: 0M freed by 74 calls
Stats: 0M really freed by 0 calls
Stats: 28M (7171 full pages) mmaped in 7 calls
  mmaps   by size class: 8:16383; 9:8191; 10:4095; 11:2047; 12:1024; 13:512; 15:128;
  mallocs by size class: 8:723; 9:19; 10:3; 11:7; 12:2; 13:1; 15:1;
  frees   by size class: 8:63; 9:7; 10:1; 11:2; 12:1;
  rfrees  by size class:
Stats: malloc large: 0 small slow: 8
Shadow byte and word:
  0x1ff566b1ac6d: 4
  0x1ff566b1ac68: 00 00 00 00 00 04 fb fb
More shadow bytes:
  0x1ff566b1ac48: 00 00 00 00 00 00 00 00
  0x1ff566b1ac50: 00 00 00 00 00 00 00 00
  0x1ff566b1ac58: 00 00 00 00 00 00 00 00
  0x1ff566b1ac60: 00 00 00 00 00 00 00 00
=>0x1ff566b1ac68: 00 00 00 00 00 04 fb fb
  0x1ff566b1ac70: fa fa fa fa fa fa fa fa
  0x1ff566b1ac78: fa fa fa fa fa fa fa fa
  0x1ff566b1ac80: fa fa fa fa fa fa fa fa
  0x1ff566b1ac88: fa fa fa fa fa fa fa fa


Log from Valgrind:

==19030== Memcheck, a memory error detector
==19030== Copyright (C) 2002-2011, and GNU GPL'd, by Julian Seward et al.
==19030== Using Valgrind-3.8.0.SVN and LibVEX; rerun with -h for copyright info
==19030== Command: ./ftbench tmp/freetype_run2/nimbus_roman_i.pfb.asan.66.764
==19030==
==19030== Invalid read of size 1
==19030==    at 0x493208: PS_Conv_Strtol (freetype2/src/psaux/psconv.c:85)
==19030==    by 0x49332D: PS_Conv_ToInt (freetype2/src/psaux/psconv.c:128)
==19030==    by 0x48E9ED: ps_parser_to_int (freetype2/src/psaux/psobjs.c:1307)
==19030==    by 0x42C2F9: parse_subrs (freetype2/src/type1/t1load.c:1397)
==19030==    by 0x42B595: t1_load_keyword (freetype2/src/type1/t1load.c:930)
==19030==    by 0x42D6C1: parse_dict (freetype2/src/type1/t1load.c:1970)
==19030==    by 0x42DAB0: T1_Open_Face (freetype2/src/type1/t1load.c:2087)
==19030==    by 0x42E778: T1_Face_Init (freetype2/src/type1/t1objs.c:339)
==19030==    by 0x407F6F: open_face (freetype2/src/base/ftobjs.c:1153)
==19030==    by 0x4097F3: FT_Open_Face (freetype2/src/base/ftobjs.c:2080)
==19030==    by 0x40808C: FT_New_Face (freetype2/src/base/ftobjs.c:1215)
==19030==    by 0x402302: get_face (ft2demos-2.4.8/src/ftbench.c:624)
==19030==  Address 0x565415d is 1 bytes after a block of size 4,844 alloc'd
==19030==    at 0x4C2A4D6: malloc (coregrind/m_replacemalloc/vg_replace_malloc.c:263)
==19030==    by 0x49441F: ft_alloc (freetype2/src/base/ftsystem.c:74)
==19030==    by 0x413466: ft_mem_qalloc (freetype2/src/base/ftutil.c:76)
==19030==    by 0x4133EE: ft_mem_alloc (freetype2/src/base/ftutil.c:55)
==19030==    by 0x428FC2: T1_Get_Private_Dict (freetype2/src/type1/t1parse.c:307)
==19030==    by 0x42DA70: T1_Open_Face (freetype2/src/type1/t1load.c:2083)
==19030==    by 0x42E778: T1_Face_Init (freetype2/src/type1/t1objs.c:339)
==19030==    by 0x407F6F: open_face (freetype2/src/base/ftobjs.c:1153)
==19030==    by 0x4097F3: FT_Open_Face (freetype2/src/base/ftobjs.c:2080)
==19030==    by 0x40808C: FT_New_Face (freetype2/src/base/ftobjs.c:1215)
==19030==    by 0x402302: get_face (ft2demos-2.4.8/src/ftbench.c:624)
==19030==    by 0x4025F4: main (ft2demos-2.4.8/src/ftbench.c:752)
==19030==
==19030== Invalid read of size 1
==19030==    at 0x493213: PS_Conv_Strtol (freetype2/src/psaux/psconv.c:85)
==19030==    by 0x49332D: PS_Conv_ToInt (freetype2/src/psaux/psconv.c:128)
==19030==    by 0x48E9ED: ps_parser_to_int (freetype2/src/psaux/psobjs.c:1307)
==19030==    by 0x42C2F9: parse_subrs (freetype2/src/type1/t1load.c:1397)
==19030==    by 0x42B595: t1_load_keyword (freetype2/src/type1/t1load.c:930)
==19030==    by 0x42D6C1: parse_dict (freetype2/src/type1/t1load.c:1970)
==19030==    by 0x42DAB0: T1_Open_Face (freetype2/src/type1/t1load.c:2087)
==19030==    by 0x42E778: T1_Face_Init (freetype2/src/type1/t1objs.c:339)
==19030==    by 0x407F6F: open_face (freetype2/src/base/ftobjs.c:1153)
==19030==    by 0x4097F3: FT_Open_Face (freetype2/src/base/ftobjs.c:2080)
==19030==    by 0x40808C: FT_New_Face (freetype2/src/base/ftobjs.c:1215)
==19030==    by 0x402302: get_face (ft2demos-2.4.8/src/ftbench.c:624)
==19030==  Address 0x565415d is 1 bytes after a block of size 4,844 alloc'd
==19030==    at 0x4C2A4D6: malloc (coregrind/m_replacemalloc/vg_replace_malloc.c:263)
==19030==    by 0x49441F: ft_alloc (freetype2/src/base/ftsystem.c:74)
==19030==    by 0x413466: ft_mem_qalloc (freetype2/src/base/ftutil.c:76)
==19030==    by 0x4133EE: ft_mem_alloc (freetype2/src/base/ftutil.c:55)
==19030==    by 0x428FC2: T1_Get_Private_Dict (freetype2/src/type1/t1parse.c:307)
==19030==    by 0x42DA70: T1_Open_Face (freetype2/src/type1/t1load.c:2083)
==19030==    by 0x42E778: T1_Face_Init (freetype2/src/type1/t1objs.c:339)
==19030==    by 0x407F6F: open_face (freetype2/src/base/ftobjs.c:1153)
==19030==    by 0x4097F3: FT_Open_Face (freetype2/src/base/ftobjs.c:2080)
==19030==    by 0x40808C: FT_New_Face (freetype2/src/base/ftobjs.c:1215)
==19030==    by 0x402302: get_face (ft2demos-2.4.8/src/ftbench.c:624)
==19030==    by 0x4025F4: main (ft2demos-2.4.8/src/ftbench.c:752)
==19030==
read_binary_data: invalid size field
couldn't load font resource
==19030==
==19030== HEAP SUMMARY:
==19030==     in use at exit: 0 bytes in 0 blocks
==19030==   total heap usage: 121 allocs, 121 frees, 44,946 bytes allocated
==19030==
==19030== All heap blocks were freed -- no leaks are possible
==19030==
==19030== For counts of detected and suppressed errors, rerun with: -v
==19030== ERROR SUMMARY: 2 errors from 2 contexts (suppressed: 4 from 4)

Mateusz Jurczyk <j00ru>
Group Member

 

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Attached Files
file #25203:  nimbus_roman_i.pfb.asan.66.764 added by j00ru (44KiB - application/octet-stream)

 

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    Follow 6 latest changes.

    Date Changed by Updated Field Previous Value => Replaced by
    2012-03-01 wl StatusNone Fixed
        PrivacyPrivate Public
        Assigned toNone wl
        Open/ClosedOpen Closed
        Planned ReleaseNone 2.4.9
    2012-02-28 j00ru Attached File- Added nimbus_roman_i.pfb.asan.66.764, #25203

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