bugThe FreeType Project - Bugs: bug #41320, Out-of-bounds read in...

 
 

bug #41320: Out-of-bounds read in af_latin_metrics_init_blues

Submitted by:  Mateusz Jurczyk <j00ru>
Submitted on:  Thu 23 Jan 2014 12:24:11 PM UTC  
 
Severity: 3 - NormalItem Group: Crash
Status: FixedPrivacy: Public
Assigned to: Werner LEMBERG <wl>Open/Closed: Closed
Planned Release: 2.5.3

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Fri 24 Jan 2014 06:06:38 PM UTC, comment #4:

Got the font, thanks.

This is now fixed in git. Thanks for the report!

Werner LEMBERG <wl>
Project AdministratorIn charge of this item.
Fri 24 Jan 2014 11:37:01 AM UTC, comment #3:

Hrmm, it seems I'm unable to upload the file even though it's within the upload limit.

Find it here, then: http://j00ru.vexillium.org/dump/msan_uninit-mem_7f4fa87d758b_1707_FreeSerif.t42

Mateusz Jurczyk <j00ru>
Project Member
Fri 24 Jan 2014 11:34:17 AM UTC, comment #2:

Done!

Mateusz Jurczyk <j00ru>
Project Member
Fri 24 Jan 2014 09:06:52 AM UTC, comment #1:

Please add the triggering font to reproduce the issue.

Werner LEMBERG <wl>
Project AdministratorIn charge of this item.
Thu 23 Jan 2014 12:24:11 PM UTC, original submission:

There is a out-of-bounds read condition in FreeType2, which has been reproduced using ftbench (with the -p command line option) built on Ubuntu amd64.

MemorySanitizer log:

==17431== WARNING: MemorySanitizer: use-of-uninitialized-value
#0 0x7f682e43858b in af_latin_metrics_init_blues freetype2/src/autofit/aflatin.c:635
#1 0x7f682e36a74a in af_latin_metrics_init freetype2/src/autofit/aflatin.c:783
#2 0x7f682e3803c6 in af_face_globals_get_metrics freetype2/src/autofit/afglobal.c:301
#3 0x7f682e37cb8a in af_loader_load_glyph freetype2/src/autofit/afloader.c:542
#4 0x7f682e378bf7 in af_autofitter_load_glyph freetype2/src/autofit/afmodule.c:234
#5 0x7f682dcd0130 in FT_Load_Glyph freetype2/src/base/ftobjs.c:717
#6 0x7f682dccb9c3 in FT_Get_Advances freetype2/src/base/ftadvanc.c:148
#7 0x7f682dcaba4d in test_load_advances ft2demos-2.5.2/src/ftbench.c:270
#8 0x7f682dcb55a6 in benchmark ft2demos-2.5.2/src/ftbench.c:216
#9 0x7f682dcb0c3d in main ft2demos-2.5.2/src/ftbench.c:1038

Uninitialized value was created by a heap allocation
#0 0x7f682dc6a959 in realloc
#1 0x7f682e64a4cb in ft_realloc freetype2/builds/unix/ftsystem.c:135
#2 0x7f682ddadda6 in ft_mem_qrealloc freetype2/src/base/ftutil.c:155
#3 0x7f682dce9fee in ft_mem_realloc freetype2/src/base/ftutil.c:102
#4 0x7f682dcec9cc in FT_GlyphLoader_CheckPoints freetype2/src/base/ftgloadr.c:225
#5 0x7f682e384651 in af_loader_load_g freetype2/src/autofit/afloader.c:149
#6 0x7f682e37d85f in af_loader_load_glyph freetype2/src/autofit/afloader.c:572
#7 0x7f682e378bf7 in af_autofitter_load_glyph freetype2/src/autofit/afmodule.c:234
#8 0x7f682dcd0130 in FT_Load_Glyph freetype2/src/base/ftobjs.c:717
#9 0x7f682dccb9c3 in FT_Get_Advances freetype2/src/base/ftadvanc.c:148
#10 0x7f682dcaba4d in test_load_advances ft2demos-2.5.2/src/ftbench.c:270
#11 0x7f682dcb55a6 in benchmark ft2demos-2.5.2/src/ftbench.c:216
#12 0x7f682dcb0c3d in main ft2demos-2.5.2/src/ftbench.c:1038

Valgrind log:

==25324== Invalid read of size 1
==25324== at 0x4A7B6D7: af_latin_metrics_init_blues (freetype2/src/autofit/aflatin.c:626)
==25324== by 0x4A7F37D: af_latin_metrics_init (freetype2/src/autofit/aflatin.c:783)
==25324== by 0x4A80F6A: af_autofitter_load_glyph (freetype2/src/autofit/afglobal.c:301)
==25324== by 0x4A3C98B: FT_Load_Glyph (freetype2/src/base/ftobjs.c:717)
==25324== by 0x4A3CCEB: FT_Get_Advances (freetype2/src/base/ftadvanc.c:148)
==25324== by 0x402B94: test_load_advances (ft2demos-2.5.2/src/ftbench.c:270)
==25324== by 0x402265: benchmark (ft2demos-2.5.2/src/ftbench.c:216)
==25324== by 0x401B0C: main (ft2demos-2.5.2/src/ftbench.c:1110)
==25324== Address 0x5e3e88f is 1 bytes before a block of size 1,632 alloc'd
==25324== at 0x402FD9E: realloc
==25324== by 0x4A39D31: ft_mem_qrealloc (freetype2/src/base/ftutil.c:155)
==25324== by 0x4A39DEA: ft_mem_realloc (freetype2/src/base/ftutil.c:102)
==25324== by 0x4A3B79D: FT_GlyphLoader_CheckPoints (freetype2/src/base/ftgloadr.c:226)
==25324== by 0x4A4849E: TT_Load_Simple_Glyph (freetype2/src/truetype/ttgload.c:404)
==25324== by 0x4A4D366: load_truetype_glyph (freetype2/src/truetype/ttgload.c:1608)
==25324== by 0x4A4DC0A: load_truetype_glyph (freetype2/src/truetype/ttgload.c:1750)
==25324== by 0x4A4FAE6: TT_Load_Glyph (freetype2/src/truetype/ttgload.c:2390)
==25324== by 0x4A66204: T42_GlyphSlot_Load (freetype2/src/type42/t42objs.c:653)
==25324== by 0x4A3C679: FT_Load_Glyph (freetype2/src/base/ftobjs.c:726)
==25324== by 0x402447: test_load (ft2demos-2.5.2/src/ftbench.c:246)
==25324== by 0x402265: benchmark (ft2demos-2.5.2/src/ftbench.c:216)
==25324==

Mateusz Jurczyk <j00ru>
Project Member

 

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    Follow 5 latest changes.

    Date Changed By Updated Field Previous Value => Replaced By
    Fri 24 Jan 2014 06:06:38 PM UTCwlStatusNone=>Fixed
      PrivacyPrivate=>Public
      Assigned toNone=>wl
      Open/ClosedOpen=>Closed
      Planned ReleaseNone=>2.5.3

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