Messages in this thread | | | Date | Wed, 26 Oct 2011 18:16:11 +0200 | From | Ola Lundqvist <> | Subject | Re: Bug#646411: 3.1-rcX (8,9,10): kernel does not validate swapfile on disk(?) - WAS: vnc4server 4.1.1+X4.3.0-3 crashing under normal use |
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Ok, thanks. Closing the bug.
Best regards,
// Ola
On Sun, Oct 23, 2011 at 08:00:56PM -0400, Justin Piszcz wrote: > Package: vnc4server > Version: 4.1.1+X4.3.0-3 > Architecture: amd64 (x86-64) > Kernel: 3.0-rc9 > > Current theory-- > > (Debian, ) You can close the bug report, my .swapfile was corrupted it > appears! When I ran swapoff -a and re-launched VNC it did not crash > anymore, unbelievable, I am also cc'ing the kernel mailing list on this > one, > how come the kernel does not ALARM or WARN or BUG() when there is a > problem with the swapfile, is there no validation? > > I was testing many 3.1.0-rcX kernels (some of them crashed my machine) > and it must have corrupted that file. The weird part is it only seemed > to (mainly) affect VNC, I also saw a coredump with xfs_db (randomly) and > a memtest86+ showed ok after 1-2 passes. > > Of course it was the last thing I decided to rule out and that was it-- > it appears, so far it has not crashed in over an hour, whereas it would > crash immediately in the past, over and over for several days so I > stopped using VNC until I had time to look into this problem further. > > Very interesting and putting this out there incase anyone else sees this > problem in the future, maybe it will help someone else. But I wish the > kernel would alarm if there were some problem with the swapfile.. Even > when swap was not in use, the presence of the [bad] file would cause vnc > to coredump quickly (after launching chrome/thunderbird/etc) After a > swapoff -a -- all problems, gone. All is back to normal now. > > I waited a few hours before sending this, still no problems/errors, very > interesting, will update if any future coredumps, but none yet.. > > Justin. > > >> >> Problem: About 1-2 weeks ago (I apt-get dist-upgrade regularly), VNC server >> began crashing, e.g. if you launch thunderbird/google chrome or other >> windows, the VNC server crashes. >> >> May be related to: >> http://old.nabble.com/Bug-424860%3A-eclipse-randomly-crashes-(VNC)-X-server-p11945956.html >> http://forums.fedoraforum.org/showthread.php?t=246145 >> >> Example: >> >> $ strace -o /tmp/out -f Xvnc -geometry 1920x1200 -depth 24 -rfbauth >> ~/.vnc/passwd :1 >> >> Xvnc Free Edition 4.1.1 - built Mar 10 2010 22:35:30 >> Copyright (C) 2002-2005 RealVNC Ltd. >> See http://www.realvnc.com for information on VNC. >> Underlying X server release 40300000, The XFree86 Project, Inc >> >> >> Sat Oct 22 19:38:49 2011 >> vncext: VNC extension running! >> vncext: Listening for VNC connections on port 5901 >> vncext: created VNC server for screen 0 >> error opening security policy file /etc/X11/xserver/SecurityPolicy >> Could not init font path element /usr/share/fonts/X11/Speedo/, removing >> from list! >> Could not init font path element /usr/share/fonts/X11/CID/, removing >> from list! >> >> Sat Oct 22 19:38:51 2011 >> Connections: accepted: 0.0.0.0::53214 >> SConnection: Client needs protocol version 3.8 >> SConnection: Client requests security type VncAuth(2) >> >> Sat Oct 22 19:38:53 2011 >> VNCSConnST: Server default pixel format depth 24 (32bpp) little-endian >> bgr888 >> VNCSConnST: Client pixel format depth 8 (8bpp) rgb max 3,3,3 shift 4,2,0 >> VNCSConnST: Client pixel format depth 24 (32bpp) little-endian rgb888 >> Segmentation fault (core dumped) >> >> -- >> >> Core backtrace: >> >> $ gdb /usr/bin/Xvnc ./core.Xvnc.26042 >> GNU gdb (GDB) 7.3-debian >> Copyright (C) 2011 Free Software Foundation, Inc. >> License GPLv3+: GNU GPL version 3 or later <http://gnu.org/licenses/gpl.html> >> This is free software: you are free to change and redistribute it. >> There is NO WARRANTY, to the extent permitted by law. Type "show copying" >> and "show warranty" for details. >> This GDB was configured as "x86_64-linux-gnu". >> For bug reporting instructions, please see: >> <http://www.gnu.org/software/gdb/bugs/>... >> Reading symbols from /usr/bin/Xvnc...(no debugging symbols found)...done. >> [New LWP 26042] >> >> warning: Can't read pathname for load map: Input/output error. >> Core was generated by `Xvnc -geometry 1920x1200 -depth 24 -rfbauth >> /home/user/.vnc/passwd :1'. >> Program terminated with signal 11, Segmentation fault. >> #0 0x00000000004cbed4 in ?? () >> (gdb) bt >> #0 0x00000000004cbed4 in ?? () >> #1 0x00000000004dd577 in ?? () >> #2 0x00000000005832a2 in ?? () >> #3 0x00000000005834ff in ?? () >> #4 0x0000000000426d90 in ?? () >> #5 0x000000000040be86 in ?? () >> #6 0x00007f070be96ead in __libc_start_main () >> from /lib/x86_64-linux-gnu/libc.so.6 >> #7 0x0000000000409259 in ?? () >> #8 0x00007fff22a53788 in ?? () >> #9 0x000000000000001c in ?? () >> #10 0x0000000000000008 in ?? () >> #11 0x00007fff22a54b2e in ?? () >> #12 0x00007fff22a54b33 in ?? () >> #13 0x00007fff22a54b3d in ?? () >> #14 0x00007fff22a54b47 in ?? () >> #15 0x00007fff22a54b4e in ?? () >> #16 0x00007fff22a54b51 in ?? () >> #17 0x00007fff22a54b5a in ?? () >> #18 0x00007fff22a54b70 in ?? () >> #19 0x0000000000000000 in ?? () >> (gdb) >> >> -- >> >> >> Strace output: (4M) >> http://home.comcast.net/~jpiszcz/20111022/vnc-strace.out >> >> From the $HOME/.vnc/*log file: >> >> (xfdesktop:5201): Wnck-CRITICAL **: wnck_workspace_get_number: >> assertion `WNCK_IS_WORKSPACE (space)' failed >> libpager-Message: Setting the pager rows returned false. Maybe the >> setting is not applied. >> >> Sat Oct 22 14:26:14 2011 >> Connections: accepted: 0.0.0.0::49493 >> SConnection: Client needs protocol version 3.8 >> SConnection: Client requests security type VncAuth(2) >> >> Sat Oct 22 14:26:15 2011 >> VNCSConnST: Server default pixel format depth 24 (32bpp) little-endian >> bgr888 >> VNCSConnST: Client pixel format depth 8 (8bpp) rgb max 3,3,3 shift 4,2,0 >> >> Sat Oct 22 14:26:16 2011 >> VNCSConnST: Client pixel format depth 24 (32bpp) little-endian rgb888 >> Gkr-Message: secret service operation failed: The name >> org.freedesktop.secrets was not provided by any .service files >> XIO: fatal IO error 11 (Resource temporarily unavailable) on X server ":1" >> after 143 requests (143 known processed) with 0 events remaining. >> xfce4-panel: Fatal IO error 11 (Resource temporarily unavailable) on X >> server :1.0. >> xfdesktop: Fatal IO error 11 (Resource temporarily unavailable) on X >> server :1.0. >> [31476:31476:297527619035:ERROR:chrome_browser_main_x11.cc(57)] X IO >> Error detected >> xfwm4: Fatal IO error 11 (Resource temporarily unavailable) on X server :1.0. >> xfce4-session: Fatal IO error 11 (Resource temporarily unavailable) on >> X server :1. >> XIO: fatal IO error 11 (Resource temporarily unavailable) on X server ":1" >> after 64951 requests (64951 known processed) with 0 events remaining. >> Thunar: Fatal IO error 11 (Resource temporarily unavailable) on X >> server :1.0. >> wrapper: Fatal IO error 11 (Resource temporarily unavailable) on X >> server :1.0. >> running 'ssh-agent -s -k' >> xfsettingsd: Fatal IO error 11 (Resource temporarily unavailable) on X >> server :1. >> unset SSH_AUTH_SOCK; >> unset SSH_AGENT_PID; >> echo Agent pid 5181 killed; >> >> >> -- >> >> Thoughts? >> >> Justin. >> > > >
-- --------------------- Ola Lundqvist --------------------------- / opal@debian.org Annebergsslingan 37 \ | ola@inguza.com 654 65 KARLSTAD | | http://inguza.com/ +46 (0)70-332 1551 | \ gpg/f.p.: 7090 A92B 18FE 7994 0C36 4FE4 18A1 B1CF 0FE5 3DD9 / ---------------------------------------------------------------
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