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Bug#741870: X server crashes when running (in particular) some Tk 8.4 apps



Control: found 741870 1:7.7+3~deb7u1

>>>>> Andrew Shadura <andrewsh@debian.org> writes:

 > Package: xserver-xorg
 > Version: 1:7.7+6
 > Severity: normal

 > When running hgk, a Mercurial port of gitk, with Tk 8.4 linked to
 > /usr/bin/wish, the X server crashes. The crash doesn't happen if the
 > X server isn't running on the active VT. It also doesn't happen with
 > any other Tk version.

	While I’m not entirely sure that it’s the same bug (so feel free
	to ‘notfound’ it as necessary), I’ve just found that Wheezy’s
	Xorg also crashes when I try to start certain X applications.
	Consider, e. g.:

# : starting a fresh Xorg at :3 here 
$ DISPLAY=:3.0 twm & wait $! ; 
[5] 14099
XIO:  fatal IO error 11 (Resource temporarily unavailable) on X server ":3.0"
      after 106 requests (106 known processed) with 0 events remaining.
[5]   Exit 1                  DISPLAY=:3.0 twm
$ 

# : starting a fresh Xorg at :3 here 
$ DISPLAY=:3.0 gv -- some.pdf & wait $! ; 
[5] 14134
XIO:  fatal IO error 11 (Resource temporarily unavailable) on X server ":3.0"
      after 123 requests (123 known processed) with 0 events remaining.
[5]   Exit 1                  DISPLAY=:3.0 gv -- some.pdf
$ 

	The server ends with just the following in the first case:

14096 Aborted                 Xorg :3 vt10 -config xorg.conf-vesa -depth 24

	yet leaves a proper backtrace (MIMEd) in the log in the second.

	Also to note is that the issue seems to be surprisingly easy to
	reproduce.

-- 
FSF associate member #7257
[ 12012.763] Backtrace:
[ 12012.763] 0: Xorg (xorg_backtrace+0x36) [0x7ff37c976d16]
[ 12012.763] 1: Xorg (0x7ff37c7f8000+0x182869) [0x7ff37c97a869]
[ 12012.763] 2: /lib/x86_64-linux-gnu/libpthread.so.0 (0x7ff37bb20000+0xf030) [0x7ff37bb2f030]
[ 12012.763] 3: /usr/lib/libXfont.so.1 (FontFileListNextFontWithInfo+0x1d) [0x7ff37b66a51d]
[ 12012.763] 4: Xorg (doListFontsWithInfo+0x163) [0x7ff37c84b473]
[ 12012.763] 5: Xorg (ProcessWorkQueue+0x21) [0x7ff37c84f0c1]
[ 12012.763] 6: Xorg (WaitForSomething+0x62) [0x7ff37c974022]
[ 12012.763] 7: Xorg (0x7ff37c7f8000+0x52bb1) [0x7ff37c84abb1]
[ 12012.764] 8: Xorg (0x7ff37c7f8000+0x41ec5) [0x7ff37c839ec5]
[ 12012.764] 9: /lib/x86_64-linux-gnu/libc.so.6 (__libc_start_main+0xfd) [0x7ff37a845ead]
[ 12012.764] 10: Xorg (0x7ff37c7f8000+0x4219d) [0x7ff37c83a19d]
[ 12012.764] 
[ 12012.764] Segmentation fault at address (nil)
[ 12012.764] 
Fatal server error:
[ 12012.764] Caught signal 11 (Segmentation fault). Server aborting

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