bugThe FreeType Project - Bugs: bug #35608, Memory corruption in T1_Open_Face...

 
 

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bug #35608: Memory corruption in T1_Open_Face / T1_Get_Private_Dict (out-of-bounds write)

Submitter:  Mateusz Jurczyk <j00ru>
Submitted:  Thu 23 Feb 2012 01:37:47 PM UTC
   
 
Severity:  3 - Normal Item Group:  Crash
Status:  Fixed Privacy:  Public
Assigned to:  wl Open/Closed:  Closed
Planned Release:  2.4.9

Sun 26 Feb 2012 07:19:54 AM UTC, comment #1: 

Fixed in git, thanks.

 Werner LEMBERG <wl>
Group administrator
Thu 23 Feb 2012 01:37:47 PM UTC, original submission:  

Crash tested with ftbench, compiled under Ubuntu amd64 with AddressSanitizer (http://code.google.com/p/address-sanitizer/).

Log from ASAN build:

=================================================================
==3842== ERROR: AddressSanitizer heap-buffer-overflow on address 0x7f84e675b781 at pc 0x4e5c16 bp 0x7fff46aa35f0 sp 0x7fff46aa35e8
WRITE of size 1 at 0x7f84e675b781 thread T0
  #0 0x4e5c16 T1_Get_Private_Dict
  #1 0x4e24ef T1_Open_Face
  #2 0x4dbb2b T1_Face_Init
  #3 0x4913e0 open_face
  #4 0x4909a3 FT_Open_Face
  #5 0x48fd06 FT_New_Face
  #6 0x487557 get_face
  #7 0x487cb1 main
  #8 0x7f84e67b8d5d __libc_start_main
0x7f84e675b781 is located 0 bytes to the right of 1-byte region [0x7f84e675b780,0x7f84e675b781)
allocated by thread T0 here:
  #0 0x5c3222 malloc
  #1 0x4a0434 ft_mem_qalloc
  #2 0x48b3cf ft_mem_alloc
  #3 0x4e540c T1_Get_Private_Dict
  #4 0x4e24ef T1_Open_Face
  #5 0x4dbb2b T1_Face_Init
  #6 0x4913e0 open_face
  #7 0x4909a3 FT_Open_Face
  #8 0x48fd06 FT_New_Face
  #9 0x487557 get_face
  #10 0x487cb1 main
  #11 0x7f84e67b8d5d __libc_start_main
==3842== ABORTING
Stats: 0M malloced (0M for red zones) by 695 calls
Stats: 0M realloced by 0 calls
Stats: 0M freed by 11 calls
Stats: 0M really freed by 0 calls
Stats: 24M (6146 full pages) mmaped in 6 calls
  mmaps   by size class: 8:16383; 9:8191; 10:4095; 11:2047; 12:1024; 15:128;
  mallocs by size class: 8:665; 9:16; 10:3; 11:5; 12:5; 15:1;
  frees   by size class: 8:7; 10:1; 11:2; 12:1;
  rfrees  by size class:
Stats: malloc large: 0 small slow: 7
Shadow byte and word:
  0x1ff09cceb6f0: 1
  0x1ff09cceb6f0: 01 fb fb fb fb fb fb fb
More shadow bytes:
  0x1ff09cceb6d0: 05 fb fb fb fb fb fb fb
  0x1ff09cceb6d8: fb fb fb fb fb fb fb fb
  0x1ff09cceb6e0: fa fa fa fa fa fa fa fa
  0x1ff09cceb6e8: fa fa fa fa fa fa fa fa
=>0x1ff09cceb6f0: 01 fb fb fb fb fb fb fb
  0x1ff09cceb6f8: fb fb fb fb fb fb fb fb
  0x1ff09cceb700: fa fa fa fa fa fa fa fa
  0x1ff09cceb708: fa fa fa fa fa fa fa fa
  0x1ff09cceb710: fa fa fa fa fa fa fa fa


Log from Valgrind:

==3829== Memcheck, a memory error detector
==3829== Copyright (C) 2002-2011, and GNU GPL'd, by Julian Seward et al.
==3829== Using Valgrind-3.8.0.SVN and LibVEX; rerun with -h for copyright info
==3829== Command: ./a.out tmp/freetype/cmbx10.pfb.asan.16.354
==3829==
==3829== Invalid write of size 1
==3829==    at 0x41DFDA: T1_Open_Face (freetype2/freetype-2.4.8/src/type1/t1parse.c:472)
==3829==    by 0x41E687: T1_Face_Init (freetype2/freetype-2.4.8/src/type1/t1objs.c:321)
==3829==    by 0x4089B7: open_face (freetype2/freetype-2.4.8/src/base/ftobjs.c:1149)
==3829==    by 0x40B362: FT_Open_Face (freetype2/freetype-2.4.8/src/base/ftobjs.c:2076)
==3829==    by 0x40C58A: FT_New_Face (freetype2/freetype-2.4.8/src/base/ftobjs.c:1211)
==3829==    by 0x40235C: get_face (freetype2/ft2demos-2.4.8/src/ftbench.c:624)
==3829==    by 0x402660: main (freetype2/ft2demos-2.4.8/src/ftbench.c:752)
==3829==  Address 0x53d88f1 is 0 bytes after a block of size 1 alloc'd
==3829==    at 0x4C2A4D6: malloc (coregrind/m_replacemalloc/vg_replace_malloc.c:263)
==3829==    by 0x406CBF: ft_mem_qalloc (freetype2/freetype-2.4.8/src/base/ftutil.c:76)
==3829==    by 0x4082D2: ft_mem_alloc (freetype2/freetype-2.4.8/src/base/ftutil.c:55)
==3829==    by 0x41DF13: T1_Open_Face (freetype2/freetype-2.4.8/src/type1/t1parse.c:307)
==3829==    by 0x41E687: T1_Face_Init (freetype2/freetype-2.4.8/src/type1/t1objs.c:321)
==3829==    by 0x4089B7: open_face (freetype2/freetype-2.4.8/src/base/ftobjs.c:1149)
==3829==    by 0x40B362: FT_Open_Face (freetype2/freetype-2.4.8/src/base/ftobjs.c:2076)
==3829==    by 0x40C58A: FT_New_Face (freetype2/freetype-2.4.8/src/base/ftobjs.c:1211)
==3829==    by 0x40235C: get_face (freetype2/ft2demos-2.4.8/src/ftbench.c:624)
==3829==    by 0x402660: main (freetype2/ft2demos-2.4.8/src/ftbench.c:752)
==3829==
==3829== Invalid write of size 1
==3829==    at 0x41DFE6: T1_Open_Face (freetype2/freetype-2.4.8/src/type1/t1parse.c:473)
==3829==    by 0x41E687: T1_Face_Init (freetype2/freetype-2.4.8/src/type1/t1objs.c:321)
==3829==    by 0x4089B7: open_face (freetype2/freetype-2.4.8/src/base/ftobjs.c:1149)
==3829==    by 0x40B362: FT_Open_Face (freetype2/freetype-2.4.8/src/base/ftobjs.c:2076)
==3829==    by 0x40C58A: FT_New_Face (freetype2/freetype-2.4.8/src/base/ftobjs.c:1211)
==3829==    by 0x40235C: get_face (freetype2/ft2demos-2.4.8/src/ftbench.c:624)
==3829==    by 0x402660: main (freetype2/ft2demos-2.4.8/src/ftbench.c:752)
==3829==  Address 0x53d88f2 is 1 bytes after a block of size 1 alloc'd
==3829==    at 0x4C2A4D6: malloc (coregrind/m_replacemalloc/vg_replace_malloc.c:263)
==3829==    by 0x406CBF: ft_mem_qalloc (freetype2/freetype-2.4.8/src/base/ftutil.c:76)
==3829==    by 0x4082D2: ft_mem_alloc (freetype2/freetype-2.4.8/src/base/ftutil.c:55)
==3829==    by 0x41DF13: T1_Open_Face (freetype2/freetype-2.4.8/src/type1/t1parse.c:307)
==3829==    by 0x41E687: T1_Face_Init (freetype2/freetype-2.4.8/src/type1/t1objs.c:321)
==3829==    by 0x4089B7: open_face (freetype2/freetype-2.4.8/src/base/ftobjs.c:1149)
==3829==    by 0x40B362: FT_Open_Face (freetype2/freetype-2.4.8/src/base/ftobjs.c:2076)
==3829==    by 0x40C58A: FT_New_Face (freetype2/freetype-2.4.8/src/base/ftobjs.c:1211)
==3829==    by 0x40235C: get_face (freetype2/ft2demos-2.4.8/src/ftbench.c:624)
==3829==    by 0x402660: main (freetype2/ft2demos-2.4.8/src/ftbench.c:752)
==3829==
==3829== Invalid write of size 1
==3829==    at 0x41DFF2: T1_Open_Face (freetype2/freetype-2.4.8/src/type1/t1parse.c:474)
==3829==    by 0x41E687: T1_Face_Init (freetype2/freetype-2.4.8/src/type1/t1objs.c:321)
==3829==    by 0x4089B7: open_face (freetype2/freetype-2.4.8/src/base/ftobjs.c:1149)
==3829==    by 0x40B362: FT_Open_Face (freetype2/freetype-2.4.8/src/base/ftobjs.c:2076)
==3829==    by 0x40C58A: FT_New_Face (freetype2/freetype-2.4.8/src/base/ftobjs.c:1211)
==3829==    by 0x40235C: get_face (freetype2/ft2demos-2.4.8/src/ftbench.c:624)
==3829==    by 0x402660: main (freetype2/ft2demos-2.4.8/src/ftbench.c:752)
==3829==  Address 0x53d88f3 is 2 bytes after a block of size 1 alloc'd
==3829==    at 0x4C2A4D6: malloc (coregrind/m_replacemalloc/vg_replace_malloc.c:263)
==3829==    by 0x406CBF: ft_mem_qalloc (freetype2/freetype-2.4.8/src/base/ftutil.c:76)
==3829==    by 0x4082D2: ft_mem_alloc (freetype2/freetype-2.4.8/src/base/ftutil.c:55)
==3829==    by 0x41DF13: T1_Open_Face (freetype2/freetype-2.4.8/src/type1/t1parse.c:307)
==3829==    by 0x41E687: T1_Face_Init (freetype2/freetype-2.4.8/src/type1/t1objs.c:321)
==3829==    by 0x4089B7: open_face (freetype2/freetype-2.4.8/src/base/ftobjs.c:1149)
==3829==    by 0x40B362: FT_Open_Face (freetype2/freetype-2.4.8/src/base/ftobjs.c:2076)
==3829==    by 0x40C58A: FT_New_Face (freetype2/freetype-2.4.8/src/base/ftobjs.c:1211)
==3829==    by 0x40235C: get_face (freetype2/ft2demos-2.4.8/src/ftbench.c:624)
==3829==    by 0x402660: main (freetype2/ft2demos-2.4.8/src/ftbench.c:752)
==3829==
couldn't load font resource
==3829==
==3829== HEAP SUMMARY:
==3829==     in use at exit: 0 bytes in 0 blocks
==3829==   total heap usage: 57 allocs, 57 frees, 38,087 bytes allocated
==3829==
==3829== All heap blocks were freed -- no leaks are possible
==3829==
==3829== For counts of detected and suppressed errors, rerun with: -v
==3829== ERROR SUMMARY: 3 errors from 3 contexts (suppressed: 4 from 4)

 Mateusz Jurczyk <j00ru>
Group Member

 

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Attached Files
file #25148:  cmbx10.pfb.asan.16.354 added by j00ru (34KiB - application/octet-stream)
file #25149:  cmssq8.pfb.asan.29.373 added by j00ru (27KiB - 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 (Updated the item)
  • -email is unavailable- added by j00ru (Submitted the item)

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    Follow 7 latest changes.

    Date Changed by Updated Field Previous Value => Replaced by
    2012-02-26 wl StatusNone Fixed
        PrivacyPrivate Public
        Open/ClosedOpen Closed
        Planned ReleaseNone 2.4.9
    2012-02-25 wl Assigned toNone wl
    2012-02-23 j00ru Attached File- Added cmbx10.pfb.asan.16.354, #25148
        Attached File- Added cmssq8.pfb.asan.29.373, #25149

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