Bug 409369 – Crash in pango_fc_font_real_get_glyph when using thai module

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Bug 409369 - Crash in pango_fc_font_real_get_glyph when using thai module


Summary:	Crash in pango_fc_font_real_get_glyph when using thai module


Status:	RESOLVED FIXED

Product:	pango
Classification:	Platform
Component:	general
Version:	unspecified
Hardware:	Other Linux

Importance:	Normal major
Target Milestone:	---
Assigned To:	pango-maint
QA Contact:	pango-maint

URL:
Whiteboard:

Depends on:
Blocks:

Reported:	2007-02-18 18:44 UTC by Josselin Mouette
Modified:	2007-09-07 19:21 UTC

See Also:
GNOME target:	---
GNOME version:	2.13/2.14

Attachments
test case (23.55 KB, text/html) 2007-06-05 20:07 UTC, Josselin Mouette	Details

Description Josselin Mouette 2007-02-18 18:44:27 UTC

[ forwarded from http://bugs.debian.org/410167 ]

This is similar to Bug#364620 but the backtrace is different. When using the thai module, a user is getting reproducible crashes:


Program received signal SIGSEGV, Segmentation fault.

+ Trace 111809

Thread 47616068345712 (LWP 27460)

#0 pango_fc_font_real_get_glyph
at /usr/src/pango/pango1.0-1.14.8/./pango/pangofc-font.c line 565
#1 thai_make_glyph_uni
at /usr/src/pango/pango1.0-1.14.8/./modules/thai/thai-fc.c line 230
#2 get_adjusted_glyphs_list
at /usr/src/pango/pango1.0-1.14.8/./modules/thai/thai-shaper.c line 179
#3 thai_engine_shape
at /usr/src/pango/pango1.0-1.14.8/./modules/thai/thai-shaper.c line 465
#4 pango_shape
at /usr/src/pango/pango1.0-1.14.8/./pango/shape.c line 51
#5 shape_run
at /usr/src/pango/pango1.0-1.14.8/./pango/pango-layout.c line 2771
#6 process_item
at /usr/src/pango/pango1.0-1.14.8/./pango/pango-layout.c line 2863
#7 pango_layout_check_lines
at /usr/src/pango/pango1.0-1.14.8/./pango/pango-layout.c line 3065
#8 pango_layout_get_extents_internal
at /usr/src/pango/pango1.0-1.14.8/./pango/pango-layout.c line 2070
#9 gtk_text_layout_get_line_display
from /usr/lib/libgtk-x11-2.0.so.0
#10 ??
from /usr/lib/libgtk-x11-2.0.so.0
#11 ??
from /usr/lib/libgtk-x11-2.0.so.0
#12 ??
from /usr/lib/libgtk-x11-2.0.so.0
#13 ??
from /usr/lib/libgtk-x11-2.0.so.0
#14 ??
from /usr/lib/libgtk-x11-2.0.so.0
#15 _gtk_text_btree_validate
from /usr/lib/libgtk-x11-2.0.so.0
#16 gtk_text_layout_validate
from /usr/lib/libgtk-x11-2.0.so.0
#17 ??
from /usr/lib/libgtk-x11-2.0.so.0
#18 g_main_context_dispatch
from /usr/lib/libglib-2.0.so.0
#19 ??
from /usr/lib/libglib-2.0.so.0
#20 g_main_loop_run
from /usr/lib/libglib-2.0.so.0
#21 gtk_main
from /usr/lib/libgtk-x11-2.0.so.0
#22 main

Comment 1 Josselin Mouette 2007-06-05 20:07:15 UTC

Created attachment 89430 [details]
test case

According to the original submitter, the following file allows to reproduce the bug with as soon as the thai module is enabled.

Comment 2 Behdad Esfahbod 2007-09-07 19:21:36 UTC

Fixed already:

2007-08-14  Behdad Esfahbod  <behdad@gnome.org>

        Bug 466755 – pango hangul is crashing in gnome-about because it is
        failing to retrieve a font.

        * pango/pangofc-font.c (pango_fc_font_real_get_glyph),
        (pango_fc_font_kern_glyphs), (pango_fc_font_get_raw_extents):
        Protect against NULL face.