Bug 658587 - xfs crashes the Fedora 14 X server with bitmapped fonts (and maybe others)
Summary: xfs crashes the Fedora 14 X server with bitmapped fonts (and maybe others)
Alias: None
Product: Fedora
Classification: Fedora
Component: xorg-x11-xfs
Version: 15
Hardware: x86_64
OS: Unspecified
Target Milestone: ---
Assignee: Adam Jackson
QA Contact: Fedora Extras Quality Assurance
Depends On:
TreeView+ depends on / blocked
Reported: 2010-11-30 18:47 UTC by Chris Siebenmann
Modified: 2013-02-01 15:14 UTC (History)
5 users (show)

Fixed In Version:
Doc Type: Bug Fix
Doc Text:
Clone Of:
Last Closed: 2012-08-07 19:26:02 UTC
Type: ---

Attachments (Terms of Use)
abrt report from Xorg crash (9.75 KB, text/plain)
2010-11-30 18:47 UTC, Chris Siebenmann
no flags Details

Description Chris Siebenmann 2010-11-30 18:47:00 UTC
Created attachment 463801 [details]
abrt report from Xorg crash

Description of problem:
If you attempt to use the X font server (xorg-x11-xfs) on Fedora 14 with
the Fedora 14 X server, the X server will crash on many or any operation
that seems to involve inventorying fonts. The minimal set of packages over
a stock install necessary to do this seems to be xfs itself and the 100dpi
bitmapped fonts, but it's possible that other font types will also do this.
(I have not attempted to do an exhaustive inventory.)

Reverting back to the Fedora 13 X server (and dependent drivers) on a
Fedora 14 system avoids the crash. This crash happens with all versions
of the Fedora 14 X server that I have seen, both the one on the
distribution image, the initial update in the updates repository, and the
latest update.

This may be the same bug as #651197 and #648608. I am refiling because
I have somewhat different abrt traces and a minimal reproduction, but
please feel free to mark this bug as a duplicate of one of the others
as appropriate.

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


How reproducible:

Steps to Reproduce:
1. install a stock 64-bit Fedora 14 system (may repro on i686; haven't tried)
2. install xorg-x11-utils (for xlsfonts), xorg-x11-xfs and xorg-x11-fonts-100dpi
3. start xfs with '/etc/rc.d/init.d/xfs start'
4. log in and add the xfs server to your font path:
       xset fp+ unix/:7100
5. run xlsfonts; the server will immediately crash

Actual results:

Server crash.

Expected results:

List of fonts.

Additional info:

The stock xfs configuration serves the same fonts that the X server
is already using, since both point to catalogue:/etc/X11/fontpath.d.
This has let me see that just having X with the bitmapped fonts or
just having X talk to xfs for fonts are not enough to create the crash.

The crash can also be reproduced with Xvfb:

Xvfb :1 -noreset &
DISPLAY=:1 xset fp+ unix/:7100
DISPLAY=:1 xlsfonts

Testing with Xvfb this way commonly shows a glibc error:
*** glibc detected *** Xvfb: double free or corruption (!prev): 0x0000000001d82210 ***

(the address varies)

I am attaching an abrt trace (from an Xorg crash, not Xvfb).

Comment 1 Ian Donaldson 2011-02-21 00:33:11 UTC
After noticing that firefox startup and kde menus crashed my X server 
every time, I can confirm this still happens with current FC14 Xorg:

$ rpm -q xorg-x11-xfs xorg-x11-fonts-100dpi xorg-x11-server-Xorg

[  2888.421] (II) config/udev: Adding input device HDA NVidia HP Out at Ext Front Jack (/dev/input/event7)
[  2888.421] (II) No input driver/identifier specified (ignoring)
[  2971.531]
[  2971.532] 0: /usr/bin/Xorg (xorg_backtrace+0x28) [0x4a0488]
[  2971.532] 1: /usr/bin/Xorg (0x400000+0x60d79) [0x460d79]
[  2971.532] 2: /lib64/libc.so.6 (0x7fccea130000+0x33140) [0x7fccea163140]
[  2971.532] 3: /usr/bin/Xorg (doListFontsWithInfo+0x1c1) [0x42e011]
[  2971.532] 4: /usr/bin/Xorg (ProcessWorkQueue+0x21) [0x4318d1]
[  2971.532] 5: /usr/bin/Xorg (WaitForSomething+0x5b) [0x459edb]
[  2971.532] 6: /usr/bin/Xorg (0x400000+0x2d252) [0x42d252]
[  2971.532] 7: /usr/bin/Xorg (0x400000+0x2152e) [0x42152e]
[  2971.532] 8: /lib64/libc.so.6 (__libc_start_main+0xfd) [0x7fccea14ee5d]
[  2971.532] 9: /usr/bin/Xorg (0x400000+0x210d9) [0x4210d9]
[  2971.532] Segmentation fault at address 0xd41a34b0
[  2971.532]
Fatal server error:
[  2971.532] Caught signal 11 (Segmentation fault). Server aborting

Also on an 32-bit machine, the original Xvfp test...

$ rpm -q xorg-x11-xfs xorg-x11-fonts-100dpi xorg-x11-server-Xorg

$ Xvfb :1 -noreset &
[1] 27322
$ DISPLAY=:1 xset fp+ unix/:7100
$ DISPLAY=:1 xlsfonts

0: Xvfb (xorg_backtrace+0x3c) [0x81badcc]
1: Xvfb (0x8047000+0x177226) [0x81be226]
2: (vdso) (__kernel_rt_sigreturn+0x0) [0x1e440c]
3: Xvfb (0x8047000+0x1207bb) [0x81677bb]
4: Xvfb (ProcessWorkQueue+0x31) [0x816adc1]
5: Xvfb (WaitForSomething+0x57) [0x81b84c7]
6: Xvfb (0x8047000+0x11f31e) [0x816631e]
7: Xvfb (0x8047000+0x10d715) [0x8154715]
8: /lib/libc.so.6 (__libc_start_main+0xe6) [0x4cfe36]
9: Xvfb (0x8047000+0x15051) [0x805c051]
Segmentation fault at address 0x8

Fatal server error:
Caught signal 11 (Segmentation fault). Server aborting

XIO:  fatal IO error 11 (Resource temporarily unavailable) on X server ":1.0"
      after 7 requests (7 known processed) with 0 events remaining.
$ [1]+  Exit 1                  Xvfb :1 -noreset

After removing the fontserver from the fontpath, the crashes stopped.

Comment 2 Chris Siebenmann 2011-04-06 13:57:31 UTC
I have just tested, and this still happens on the just released X server
update to 1.9.5 (xorg-x11-server-Xorg-1.9.5-1.fc14).

Comment 3 Fedora End Of Life 2012-08-07 19:26:07 UTC
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