bugThe FreeType Project - Bugs: bug #30247, NULL-ptr in pcf/pcfdrivr.c:479

 
 

bug #30247: NULL-ptr in pcf/pcfdrivr.c:479

Submitted by:  Robert Swiecki <jagger>
Submitted on:  Thu 24 Jun 2010 05:41:58 PM UTC  
 
Severity: 3 - NormalItem Group: Crash
Status: FixedPrivacy: Public
Assigned to: Werner LEMBERG <wl>Open/Closed: Closed
Planned Release: 2.3.13

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Thu 24 Jun 2010 06:21:24 PM UTC, comment #1:

Fixed in git, thanks.

Werner LEMBERG <wl>
Project AdministratorIn charge of this item.
Thu 24 Jun 2010 05:41:58 PM UTC, original submission:

gcc version 4.4.3, compiled with "-O0 -g" on an amd64 linux

Font: http://alt.swiecki.net/j/f/sigsegv15.pcf

$ gdb ./ftbench

(gdb) r -c 1 sigsegv15.pcf
Program received signal SIGSEGV, Segmentation fault.
0x000000000044886a in PCF_Glyph_Load (slot=0x6bb680, size=0x6bb810, glyph_index=0, load_flags=0) at /usr/local/google/src/freetype2/src/pcf/pcfdrivr.c:479
479 bitmap->rows = metric->ascent + metric->descent;

(gdb) p metric
$1 = (PCF_Metric) 0x0

(gdb) bt
#0 0x000000000044886a in PCF_Glyph_Load (slot=0x6bb680, size=0x6bb810, glyph_index=0, load_flags=0) at /usr/local/google/src/freetype2/src/pcf/pcfdrivr.c:479
#1 0x0000000000406ade in FT_Load_Glyph (face=0x6aea60, glyph_index=0, load_flags=0) at /usr/local/google/src/freetype2/src/base/ftobjs.c:677
#2 0x0000000000402673 in test_load (timer=0x7fffffffe480, face=0x6aea60, user_data=0x0) at /usr/local/google/src/freetype2-demos/src/ftbench.c:218
#3 0x00000000004025a8 in benchmark (face=0x6aea60, test=0x7fffffffe4f0, max_iter=1, max_time=2) at /usr/local/google/src/freetype2-demos/src/ftbench.c:188
#4 0x000000000040374e in main (argc=1, argv=0x7fffffffe670) at /usr/local/google/src/freetype2-demos/src/ftbench.c:781

$ valgrind ./ftbench -c 1 sigsegv15.pcf
VALGRIND_MEMORY_LIMIT_IN_MB=4095; VALGRIND_TIMEOUT=3600
==20205== Memcheck, a memory error detector
==20205== Copyright (C) 2002-2009, and GNU GPL'd, by Julian Seward et al.
==20205== Using Valgrind-3.6.0.SVN and LibVEX; rerun with -h for copyright info
==20205== Command: ./ftbench -c 1 sigsegv15.pcf
==20205==
==20205== Invalid read of size 8
==20205== at 0x5173354: __strcmp_ssse3 /build/buildd/eglibc-2.11.1/string/../sysdeps/x86_64/multiarch/../strcmp.S:1562
==20205== by 0x4462CE: pcf_find_property /usr/local/google/src/freetype2/src/pcf/pcfread.c:385
==20205== by 0x447576: pcf_interpret_style /usr/local/google/src/freetype2/src/pcf/pcfread.c:1006
==20205== by 0x447ABC: pcf_load_font /usr/local/google/src/freetype2/src/pcf/pcfread.c:1168
==20205== by 0x4484BE: PCF_Face_Init /usr/local/google/src/freetype2/src/pcf/pcfdrivr.c:319
==20205== by 0x407426: open_face /usr/local/google/src/freetype2/src/base/ftobjs.c:1110
==20205== by 0x4089C6: FT_Open_Face /usr/local/google/src/freetype2/src/base/ftobjs.c:1995
==20205== by 0x407543: FT_New_Face /usr/local/google/src/freetype2/src/base/ftobjs.c:1172
==20205== by 0x40323F: get_face /usr/local/google/src/freetype2-demos/src/ftbench.c:615
==20205== by 0x4035AE: main /usr/local/google/src/freetype2-demos/src/ftbench.c:739
==20205== Address 0x53debf8 is 0 bytes after a block of size 8 alloc'd
==20205== at 0x4C289AA: malloc /tmp/vg/coregrind/m_replacemalloc/vg_replace_malloc.c:236
==20205== by 0x480BF7: ft_alloc /usr/local/google/src/freetype2/builds/unix/ftsystem.c:102
==20205== by 0x410FCE: ft_mem_qalloc /usr/local/google/src/freetype2/src/base/ftutil.c:76
==20205== by 0x41123F: ft_mem_dup /usr/local/google/src/freetype2/src/base/ftutil.c:182
==20205== by 0x4112C9: ft_mem_strdup /usr/local/google/src/freetype2/src/base/ftutil.c:202
==20205== by 0x44671A: pcf_get_properties /usr/local/google/src/freetype2/src/pcf/pcfread.c:522
==20205== by 0x44796D: pcf_load_font /usr/local/google/src/freetype2/src/pcf/pcfread.c:1113
==20205== by 0x4484BE: PCF_Face_Init /usr/local/google/src/freetype2/src/pcf/pcfdrivr.c:319
==20205== by 0x407426: open_face /usr/local/google/src/freetype2/src/base/ftobjs.c:1110
==20205== by 0x4089C6: FT_Open_Face /usr/local/google/src/freetype2/src/base/ftobjs.c:1995
==20205== by 0x407543: FT_New_Face /usr/local/google/src/freetype2/src/base/ftobjs.c:1172
==20205== by 0x40323F: get_face /usr/local/google/src/freetype2-demos/src/ftbench.c:615
...
etc...
==20205== Invalid read of size 2
==20205== at 0x44886A: PCF_Glyph_Load /usr/local/google/src/freetype2/src/pcf/pcfdrivr.c:479
==20205== by 0x406ADD: FT_Load_Glyph /usr/local/google/src/freetype2/src/base/ftobjs.c:677
==20205== by 0x402672: test_load /usr/local/google/src/freetype2-demos/src/ftbench.c:218
==20205== by 0x4025A7: benchmark /usr/local/google/src/freetype2-demos/src/ftbench.c:188
==20205== by 0x40374D: main /usr/local/google/src/freetype2-demos/src/ftbench.c:781
==20205== Address 0x6 is not stack'd, malloc'd or (recently) free'd
==20205==
==20205==
==20205== Process terminating with default action of signal 11 (SIGSEGV)
==20205== Access not within mapped region at address 0x6
==20205== at 0x44886A: PCF_Glyph_Load /usr/local/google/src/freetype2/src/pcf/pcfdrivr.c:479
==20205== by 0x406ADD: FT_Load_Glyph /usr/local/google/src/freetype2/src/base/ftobjs.c:677
==20205== by 0x402672: test_load /usr/local/google/src/freetype2-demos/src/ftbench.c:218
==20205== by 0x4025A7: benchmark /usr/local/google/src/freetype2-demos/src/ftbench.c:188
==20205== by 0x40374D: main /usr/local/google/src/freetype2-demos/src/ftbench.c:781

Robert Swiecki <jagger>

 

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Attached Files
file #20808:  sigsegv15.pcf added by jagger (4KiB - application/x-font-pcf)

 

Depends on the following items: None found

Items that depend on this one: None found

 

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  • -unavailable- added by wl (Posted a comment)
  • -unavailable- added by jagger (Submitted the item)
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    Follow 5 latest changes.

    Date Changed By Updated Field Previous Value => Replaced By
    Thu 24 Jun 2010 06:21:24 PM UTCwlStatusNone=>Fixed
      Assigned toNone=>wl
      Open/ClosedOpen=>Closed
      Planned ReleaseNone=>2.3.13
    Thu 24 Jun 2010 05:41:58 PM UTCjaggerAttached File-=>Added sigsegv15.pcf, #20808

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