bugThe FreeType Project - Bugs: bug #35609, Out-of-bounds read in...

 
 

You are not allowed to post comments on this tracker with your current authentication level.

bug #35609: Out-of-bounds read in _bdf_parse_glyphs (3)

Submitter:  Mateusz Jurczyk <j00ru>
Submitted:  Thu 23 Feb 2012 01:45:08 PM UTC
   
 
Severity:  3 - Normal Item Group:  Crash
Status:  Fixed Privacy:  Public
Assigned to:  wl Open/Closed:  Closed
Planned Release:  2.4.9

Jump to the original submission

Mon 27 Feb 2012 09:05:51 PM UTC, comment #7: 

Thanks, so I'm closing it as fixed.

 Werner LEMBERG <wl>
Group administrator
Mon 27 Feb 2012 03:59:35 PM UTC, comment #6: 

Hmm, I cannot reproduce the bug with ASAN or Valgrind with the current git anymore, either.

 Mateusz Jurczyk <j00ru>
Group Member
Sat 25 Feb 2012 12:39:02 PM UTC, comment #5: 

Again a bug which I can't reproduce :-(

Werner LEMBERG <wl>
Group administrator
Sat 25 Feb 2012 12:32:09 PM UTC, comment #4: 

I've downloaded it, thanks.  The file is apparently too large to be attached to this bug report...

I'm trying to attached it in compressed form.

(file #25161)

 Werner LEMBERG <wl>
Group administrator
Sat 25 Feb 2012 12:25:10 PM UTC, comment #3: 

For unknown reasons, I am unable to upload the sample. Please find it here: http://j00ru.vexillium.org/dump/cns5-40.bdf.asan.e.381

 Mateusz Jurczyk <j00ru>
Group Member
Sat 25 Feb 2012 12:19:24 PM UTC, comment #2: 

Oh, sorry, testcase attached.

 Mateusz Jurczyk <j00ru>
Group Member
Sat 25 Feb 2012 09:22:09 AM UTC, comment #1: 

Please provide a test font.

 Werner LEMBERG <wl>
Group administrator
Thu 23 Feb 2012 01:45:08 PM UTC, original submission:  

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

Note: Strangely enough, this issue is only detected by ASAN in my tests; valgrind does not raise any objections.

Log from ASAN build:

=================================================================
==4403== ERROR: AddressSanitizer heap-buffer-overflow on address 0x7f5a3ae8d3a0 at pc 0x571b5e bp 0x7fffb7e1be10 sp 0x7fffb7e1be08
READ of size 8 at 0x7f5a3ae8d3a0 thread T0
  #0 0x571b5e _bdf_parse_glyphs
  #1 0x56a876 _bdf_readstream
  #2 0x568a19 bdf_load_font
  #3 0x565aad BDF_Face_Init
  #4 0x4913e0 open_face
  #5 0x4909a3 FT_Open_Face
  #6 0x48fd06 FT_New_Face
  #7 0x487557 get_face
  #8 0x487cb1 main
  #9 0x7f5a3bed7d5d __libc_start_main
0x7f5a3ae8d3a0 is located 4784 bytes to the right of 16496-byte region [0x7f5a3ae88080,0x7f5a3ae8c0f0)
allocated by thread T0 here:
  #0 0x5c3222 malloc
  #1 0x4a0434 ft_mem_qalloc
  #2 0x48b3cf ft_mem_alloc
  #3 0x56893c bdf_load_font
  #4 0x565aad BDF_Face_Init
  #5 0x4913e0 open_face
  #6 0x4909a3 FT_Open_Face
  #7 0x48fd06 FT_New_Face
  #8 0x487557 get_face
  #9 0x487cb1 main
  #10 0x7f5a3bed7d5d __libc_start_main
==4403== ABORTING
Stats: 0M malloced (0M for red zones) by 836 calls
Stats: 0M realloced by 3 calls
Stats: 0M freed by 31 calls
Stats: 0M really freed by 0 calls
Stats: 36M (9221 full pages) mmaped in 9 calls
  mmaps   by size class: 8:16383; 9:8191; 10:4095; 11:2047; 12:1024; 13:512; 15:128; 16:64; 19:8;
  mallocs by size class: 8:792; 9:23; 10:7; 11:6; 12:3; 13:1; 15:2; 16:1; 19:1;
  frees   by size class: 8:18; 9:3; 10:6; 11:2; 12:1; 13:1;
  rfrees  by size class:
Stats: malloc large: 1 small slow: 9
Shadow byte and word:
  0x1feb475d1a74: fa
  0x1feb475d1a70: fa fa fa fa fa fa fa fa
More shadow bytes:
  0x1feb475d1a50: fa fa fa fa fa fa fa fa
  0x1feb475d1a58: fa fa fa fa fa fa fa fa
  0x1feb475d1a60: fa fa fa fa fa fa fa fa
  0x1feb475d1a68: fa fa fa fa fa fa fa fa
=>0x1feb475d1a70: fa fa fa fa fa fa fa fa
  0x1feb475d1a78: fa fa fa fa fa fa fa fa
  0x1feb475d1a80: fa fa fa fa fa fa fa fa
  0x1feb475d1a88: fa fa fa fa fa fa fa fa
  0x1feb475d1a90: fa fa fa fa fa fa fa fa

Mateusz Jurczyk <j00ru>
Group Member

 

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

Attached Files
file #25161:  cns5-40.bdf.asan.e.381.xz added by wl (704KiB - 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)

    •  

    There are 0 votes so far. Votes easily highlight which items people would like to see resolved in priority, independently of the priority of the item set by tracker managers.

     

    Follow 6 latest changes.

    Date Changed by Updated Field Previous Value => Replaced by
    2012-02-27 wl StatusNone Fixed
        PrivacyPrivate Public
        Open/ClosedOpen Closed
        Planned ReleaseNone 2.4.9
    2012-02-25 wl Assigned toNone wl
    2012-02-25 wl Attached File- Added cns5-40.bdf.asan.e.381.xz, #25161

    Back to the top

    Copyright © 2024 Free Software Foundation, Inc.
    Verbatim copying and distribution of this entire article is permitted in any medium, provided this notice is preserved.
    The Levitating, Meditating, Flute-playing Gnu logo is a GNU GPL'ed image provided by the Nevrax Design Team.
    Page source code

    Powered by Savane 3.13-081f.
    Corresponding source code