Red Hat Bugzilla – Bug 434647
X server segfaults in libXfont fs_cleanup_bfont()
Last modified: 2014-06-18 05:10:00 EDT
Description of problem:
The X server dies with a segmentation fault. Here is the backtrace:
0: /usr/bin/X(xf86SigHandler+0x81) [0x80c2f01]
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).
559 FSFontDataRec *fsd;
561 if (bfont->pfont)
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
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.
Created attachment 304148 [details]
Xorg.0.log with several backtraces
Linux apogee8.apogeect.com 188.8.131.52-64.fc8 #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 :-(
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?
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