Bug 434647 - X server segfaults in libXfont fs_cleanup_bfont()
Summary: X server segfaults in libXfont fs_cleanup_bfont()
Alias: None
Product: Fedora
Classification: Fedora
Component: libXfont
Version: 8
Hardware: i386
OS: Linux
Target Milestone: ---
Assignee: Søren Sandmann Pedersen
QA Contact: Fedora Extras Quality Assurance
Depends On:
TreeView+ depends on / blocked
Reported: 2008-02-23 22:27 UTC by Thomas Quinn
Modified: 2014-06-18 09:10 UTC (History)
3 users (show)

Fixed In Version:
Doc Type: Bug Fix
Doc Text:
Clone Of:
Last Closed: 2009-01-09 06:03:20 UTC
Type: ---

Attachments (Terms of Use)
Xorg.0.log with several backtraces (40.07 KB, text/plain)
2008-04-29 18:30 UTC, Frank Middleton
no flags Details
gdb backtrace after screensaver screen blank causes segfault (42.96 KB, text/plain)
2008-05-02 20:08 UTC, Frank Middleton
no flags Details

Description Thomas Quinn 2008-02-23 22:27:14 UTC
Description of problem:

The X server dies with a segmentation fault.  Here is the backtrace:

0: /usr/bin/X(xf86SigHandler+0x81) [0x80c2f01]
1: [0x110420]
2: /usr/lib/libXfont.so.1 [0xa56d14]
3: /usr/lib/libXfont.so.1 [0xa573ff]
4: /usr/lib/libXfont.so.1 [0xa594ae]
5: /usr/lib/libXfont.so.1 [0xa59647]
6: /usr/bin/X(FontWakeup+0x4d) [0x808920d]
7: /usr/bin/X(WakeupHandler+0x59) [0x808c959]
8: /usr/bin/X(WaitForSomething+0x1ae) [0x81b64be]
9: /usr/bin/X(Dispatch+0x8d) [0x80886fd]
10: /usr/bin/X(main+0x49a) [0x807054a]
11: /lib/libc.so.6(__libc_start_main+0xe0) [0x884390]
12: /usr/bin/X(FontFileCompleteXLFD+0x1f1) [0x806f831]

Fatal server error:
Caught signal 11.  Server aborting

Here is symbol information for libXfont:
0xa56d14 <fs_cleanup_bfont+20>: mov    0x78(%eax),%edi
0xa573ff <fs_abort_blockrec+143>:       lea    0x20(%esi),%eax
0xa594ae <_fs_check_reconnect+142>:     mov    0x6c(%edi),%esi
0xa59647 <fs_wakeup+215>:       jmp    0xa595c6 <fs_wakeup+86>

0xa56d14 is in fs_cleanup_bfont (fserve.c:563).
558     {
559         FSFontDataRec *fsd;
561         if (bfont->pfont)
562         {
563             fsd = (FSFontDataRec *) bfont->pfont->fpePrivate;
565             /* make sure the FS knows we choked on it */
566             fs_send_close_font(bfont->pfont->fpe, bfont->fontid);

Version-Release number of selected component (if applicable):

Name   : libXfont
Arch   : i386
Version: 1.3.1
Release: 2.fc8

How reproducible:

I'm not sure how to reproduce it, although it seems to correlate with use of
firefox.  The crash happens about every other day since an update in mid February.

Comment 1 Frank Middleton 2008-04-29 18:30:45 UTC
Created attachment 304148 [details]
Xorg.0.log with several backtraces

Linux apogee8.apogeect.com #1 SMP Sat Mar 29 09:54:46 EDT 2008
i686 athlon i386 GNU/Linux


This crash has become more frequent with more recent updates (updates are
current). To reproduce, start Firefox and go to E-Bay. May have to revert to
FC3 (rock solid on this machine) until this is fixed :-(

Comment 2 Frank Middleton 2008-05-02 20:08:46 UTC
Created attachment 304407 [details]
gdb backtrace after screensaver screen blank causes segfault

It turned out to be the screen blanker. Disabling the screen saver entirely
eliminates the segfault. This clearly has nothing to do with libXfont
fs_cleanup_bfont() so maybe it should be a new bug?

Comment 3 Bug Zapper 2008-11-26 09:55:29 UTC
This message is a reminder that Fedora 8 is nearing its end of life.
Approximately 30 (thirty) days from now Fedora will stop maintaining
and issuing updates for Fedora 8.  It is Fedora's policy to close all
bug reports from releases that are no longer maintained.  At that time
this bug will be closed as WONTFIX if it remains open with a Fedora 
'version' of '8'.

Package Maintainer: If you wish for this bug to remain open because you
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Comment 4 Bug Zapper 2009-01-09 06:03:20 UTC
Fedora 8 changed to end-of-life (EOL) status on 2009-01-07. Fedora 8 is 
no longer maintained, which means that it will not receive any further 
security or bug fix updates. As a result we are closing this bug.

If you can reproduce this bug against a currently maintained version of 
Fedora please feel free to reopen this bug against that version.

Thank you for reporting this bug and we are sorry it could not be fixed.

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