[Bug 407428] Re: sshd zombie processes and strange behavior after karmic upgrade
Wow, yes, excellent catch. udevd.c:worker_new() blocks a load of signals and nothing puts them back. Bug tennis :-) ** Package changed: openssh (Ubuntu) => udev (Ubuntu) ** Changed in: udev (Ubuntu) Milestone: karmic-alpha-5 => karmic-alpha-6 -- sshd zombie processes and strange behavior after karmic upgrade https://bugs.launchpad.net/bugs/407428 You received this bug notification because you are a member of Ubuntu Server Team, which is subscribed to openssh in ubuntu. -- Ubuntu-server-bugs mailing list Ubuntu-server-bugs@lists.ubuntu.com Modify settings or unsubscribe at: https://lists.ubuntu.com/mailman/listinfo/ubuntu-server-bugs
[Bug 407428] Re: sshd zombie processes and strange behavior after karmic upgrade
The culprit is udev. udev runs "ifup" when it founds eth0, then ifup starts dhclient3 and restarts sshd! Temporary fix to this: - Remove "auto eth0" from /etc/network/interfaces - Add "/sbin/ifup eth0" to /etc/rc.local (before "exit 0", of course) Now only udev has the strange signal mask on my machine. -- sshd zombie processes and strange behavior after karmic upgrade https://bugs.launchpad.net/bugs/407428 You received this bug notification because you are a member of Ubuntu Server Team, which is subscribed to openssh in ubuntu. -- Ubuntu-server-bugs mailing list Ubuntu-server-bugs@lists.ubuntu.com Modify settings or unsubscribe at: https://lists.ubuntu.com/mailman/listinfo/ubuntu-server-bugs
[Bug 407428] Re: sshd zombie processes and strange behavior after karmic upgrade
I am also experiencing this problem, and found that some other processes have this strange signal mask. udevd and dhclient3. They are not descendants of sshd. So I guess the culprit is not sshd but somewhere in the system startup scripts. ** Attachment added: "Output from ps axsf" http://launchpadlibrarian.net/31274197/ps.txt -- sshd zombie processes and strange behavior after karmic upgrade https://bugs.launchpad.net/bugs/407428 You received this bug notification because you are a member of Ubuntu Server Team, which is subscribed to openssh in ubuntu. -- Ubuntu-server-bugs mailing list Ubuntu-server-bugs@lists.ubuntu.com Modify settings or unsubscribe at: https://lists.ubuntu.com/mailman/listinfo/ubuntu-server-bugs
[Bug 407428] Re: sshd zombie processes and strange behavior after karmic upgrade
I can also confirm this problem. As can I confirm that "/etc/init.d/ssh restart" is a valid (but time consuming and probably proportional in time to number of processes) workaround. When I noticed this problem (after about 15 hours of uptime), there were something in the region of 3000 defunct ssh PID:s so it'd basically take a week of uptime to fill up all the PID:s. I don't know for sure, but that could be a bad thing. :P -- sshd zombie processes and strange behavior after karmic upgrade https://bugs.launchpad.net/bugs/407428 You received this bug notification because you are a member of Ubuntu Server Team, which is subscribed to openssh in ubuntu. -- Ubuntu-server-bugs mailing list Ubuntu-server-bugs@lists.ubuntu.com Modify settings or unsubscribe at: https://lists.ubuntu.com/mailman/listinfo/ubuntu-server-bugs
[Bug 407428] Re: sshd zombie processes and strange behavior after karmic upgrade
Hi Michael Please paste the result of "cat /proc/`pidof sshd | awk '{print $1}'`/status | grep SigBlk". If the problem is not caused by sigmask. The workaround can't work. :) -- sshd zombie processes and strange behavior after karmic upgrade https://bugs.launchpad.net/bugs/407428 You received this bug notification because you are a member of Ubuntu Server Team, which is subscribed to openssh in ubuntu. -- Ubuntu-server-bugs mailing list Ubuntu-server-bugs@lists.ubuntu.com Modify settings or unsubscribe at: https://lists.ubuntu.com/mailman/listinfo/ubuntu-server-bugs
[Bug 407428] Re: sshd zombie processes and strange behavior after karmic upgrade
are the Ctrl-C and screen issues listed as separate bugs or is it really the same problem? -- sshd zombie processes and strange behavior after karmic upgrade https://bugs.launchpad.net/bugs/407428 You received this bug notification because you are a member of Ubuntu Server Team, which is subscribed to openssh in ubuntu. -- Ubuntu-server-bugs mailing list Ubuntu-server-bugs@lists.ubuntu.com Modify settings or unsubscribe at: https://lists.ubuntu.com/mailman/listinfo/ubuntu-server-bugs
[Bug 407428] Re: sshd zombie processes and strange behavior after karmic upgrade
hehe, no probs Wisefox. I tried a new session and ctrl+c does appear to work as expected now. Bravo! -- sshd zombie processes and strange behavior after karmic upgrade https://bugs.launchpad.net/bugs/407428 You received this bug notification because you are a member of Ubuntu Server Team, which is subscribed to openssh in ubuntu. -- Ubuntu-server-bugs mailing list Ubuntu-server-bugs@lists.ubuntu.com Modify settings or unsubscribe at: https://lists.ubuntu.com/mailman/listinfo/ubuntu-server-bugs
[Bug 407428] Re: sshd zombie processes and strange behavior after karmic upgrade
I have no success, too. # ./sigwrapper /etc/init.d/ssh restart father return; r...@menk:~# * Restarting OpenBSD Secure Shell server sshd r...@menk:~# On another ssh session started thereafter, still no Ctrl-C. -- sshd zombie processes and strange behavior after karmic upgrade https://bugs.launchpad.net/bugs/407428 You received this bug notification because you are a member of Ubuntu Server Team, which is subscribed to openssh in ubuntu. -- Ubuntu-server-bugs mailing list Ubuntu-server-bugs@lists.ubuntu.com Modify settings or unsubscribe at: https://lists.ubuntu.com/mailman/listinfo/ubuntu-server-bugs
[Bug 407428] Re: sshd zombie processes and strange behavior after karmic upgrade
Hi Brett. I forgot to mention that: You need to logout from current console. Then login your machine. Sorry for that. -- sshd zombie processes and strange behavior after karmic upgrade https://bugs.launchpad.net/bugs/407428 You received this bug notification because you are a member of Ubuntu Server Team, which is subscribed to openssh in ubuntu. -- Ubuntu-server-bugs mailing list Ubuntu-server-bugs@lists.ubuntu.com Modify settings or unsubscribe at: https://lists.ubuntu.com/mailman/listinfo/ubuntu-server-bugs
[Bug 407428] Re: sshd zombie processes and strange behavior after karmic upgrade
OK, I did that. Apart from a warning regarding printf it went OK but it did not make a difference to the ctrl+c problem Console output is below; bre...@jupiter:~$ gcc -o sigwapper sshfix.c sshfix.c: In function ‘main’: sshfix.c:17: warning: incompatible implicit declaration of built-in function ‘printf’ bre...@jupiter:~$ sudo ./sigwapper /etc/init.d/ssh restart [sudo] password for brettg: father return; bre...@jupiter:~$ * Restarting OpenBSD Secure Shell server sshd[ OK ] bre...@jupiter:~$ -- sshd zombie processes and strange behavior after karmic upgrade https://bugs.launchpad.net/bugs/407428 You received this bug notification because you are a member of Ubuntu Server Team, which is subscribed to openssh in ubuntu. -- Ubuntu-server-bugs mailing list Ubuntu-server-bugs@lists.ubuntu.com Modify settings or unsubscribe at: https://lists.ubuntu.com/mailman/listinfo/ubuntu-server-bugs
[Bug 407428] Re: sshd zombie processes and strange behavior after karmic upgrade
Well. Provide a piece of code as a workaround. compile the following C code: #include "signal.h" int main( int argc, char ** argv ) { sigset_t oldset, newset; sigfillset( &newset ); sigprocmask( SIG_UNBLOCK, &newset, &oldset ); int pid = fork(); if ( pid == 0 ) { execvp( argv[1], &(argv[1]) ); perror("\n"); } else { printf("father return;\n"); } } = gcc -o sigwapper thisfile.c = Use the program to fix the problem as workaround. need root privilege : = $ ./sigwapper /etc/init.d/ssh restart = Check if the C + c is back or not. -- sshd zombie processes and strange behavior after karmic upgrade https://bugs.launchpad.net/bugs/407428 You received this bug notification because you are a member of Ubuntu Server Team, which is subscribed to openssh in ubuntu. -- Ubuntu-server-bugs mailing list Ubuntu-server-bugs@lists.ubuntu.com Modify settings or unsubscribe at: https://lists.ubuntu.com/mailman/listinfo/ubuntu-server-bugs
[Bug 407428] Re: sshd zombie processes and strange behavior after karmic upgrade
I confirm this bug -- sshd zombie processes and strange behavior after karmic upgrade https://bugs.launchpad.net/bugs/407428 You received this bug notification because you are a member of Ubuntu Server Team, which is subscribed to openssh in ubuntu. -- Ubuntu-server-bugs mailing list Ubuntu-server-bugs@lists.ubuntu.com Modify settings or unsubscribe at: https://lists.ubuntu.com/mailman/listinfo/ubuntu-server-bugs
[Bug 407428] Re: sshd zombie processes and strange behavior after karmic upgrade
Might any of you have restarted sshd from within a su session? I don't have definite proof that it's related, but I note that the quoted blocked signal mask corresponds exactly to those signals that su blocks. I wonder if it's due to some PAM session module ... -- sshd zombie processes and strange behavior after karmic upgrade https://bugs.launchpad.net/bugs/407428 You received this bug notification because you are a member of Ubuntu Server Team, which is subscribed to openssh in ubuntu. -- Ubuntu-server-bugs mailing list Ubuntu-server-bugs@lists.ubuntu.com Modify settings or unsubscribe at: https://lists.ubuntu.com/mailman/listinfo/ubuntu-server-bugs
[Bug 407428] Re: sshd zombie processes and strange behavior after karmic upgrade
Actually ... few reboots later the problem is back. :-( -- sshd zombie processes and strange behavior after karmic upgrade https://bugs.launchpad.net/bugs/407428 You received this bug notification because you are a member of Ubuntu Server Team, which is subscribed to openssh in ubuntu. -- Ubuntu-server-bugs mailing list Ubuntu-server-bugs@lists.ubuntu.com Modify settings or unsubscribe at: https://lists.ubuntu.com/mailman/listinfo/ubuntu-server-bugs
[Bug 407428] Re: sshd zombie processes and strange behavior after karmic upgrade
Same here. CTRL-C handling on SSH works again, I don't see zombies, but "poweroff" hangs at "checking for unattended upgrades .. * asking all remaining processes to terminate ". No CTRL-ALT-DEL or anything else helps in this state, only hard resetting. And there are more mysterious things going on with SSH: /etc/init.d/ssh stop leaves the sshd process running, even kill does not work, I need kill -9 . But this also doesn't solve the poweroff problem. Hoewver, a "reboot" command worked. See this on two machines so far. -- sshd zombie processes and strange behavior after karmic upgrade https://bugs.launchpad.net/bugs/407428 You received this bug notification because you are a member of Ubuntu Server Team, which is subscribed to openssh in ubuntu. -- Ubuntu-server-bugs mailing list Ubuntu-server-bugs@lists.ubuntu.com Modify settings or unsubscribe at: https://lists.ubuntu.com/mailman/listinfo/ubuntu-server-bugs
[Bug 407428] Re: sshd zombie processes and strange behavior after karmic upgrade
Seems latest update fix the problem. But now, I get ext4 and shutdown problem. -- sshd zombie processes and strange behavior after karmic upgrade https://bugs.launchpad.net/bugs/407428 You received this bug notification because you are a member of Ubuntu Server Team, which is subscribed to openssh in ubuntu. -- Ubuntu-server-bugs mailing list Ubuntu-server-bugs@lists.ubuntu.com Modify settings or unsubscribe at: https://lists.ubuntu.com/mailman/listinfo/ubuntu-server-bugs
[Bug 407428] Re: sshd zombie processes and strange behavior after karmic upgrade
I can confirm this bug -- sshd zombie processes and strange behavior after karmic upgrade https://bugs.launchpad.net/bugs/407428 You received this bug notification because you are a member of Ubuntu Server Team, which is subscribed to openssh in ubuntu. -- Ubuntu-server-bugs mailing list Ubuntu-server-bugs@lists.ubuntu.com Modify settings or unsubscribe at: https://lists.ubuntu.com/mailman/listinfo/ubuntu-server-bugs
[Bug 407428] Re: sshd zombie processes and strange behavior after karmic upgrade
how is it possible to set the SigBlk-mask? That would be a workaround, or? -- sshd zombie processes and strange behavior after karmic upgrade https://bugs.launchpad.net/bugs/407428 You received this bug notification because you are a member of Ubuntu Server Team, which is subscribed to openssh in ubuntu. -- Ubuntu-server-bugs mailing list Ubuntu-server-bugs@lists.ubuntu.com Modify settings or unsubscribe at: https://lists.ubuntu.com/mailman/listinfo/ubuntu-server-bugs
[Bug 407428] Re: sshd zombie processes and strange behavior after karmic upgrade
Don't know the developer already get the root cause or not. I can provide some clue deeper into this issue. When Karmic starts the ssh and other several services(udevd,dhcp etc.), it uses a wrong Sigmask set for the program: Check the Sigblk for sshd: $ cat /proc/`pidof sshd| awk '{print $1}'`/status | grep Sig SigQ: 4/16297 SigPnd: SigBlk: fffe7ffb9eff # should be all zero SigIgn: SigCgt: 000180006000 All child forked by sshd will succeed the same SigBlk from sshd. And the Ctrl + C token uses the SIGINT(2) to interrupt the program. But it's blocked by the program. That's the cause of sshd zombie and Ctrl + C problem. I provide two method to get sshd back to normal. 1). On that machine(physical), use the /etc/init.d/ssh stop/start to restart ssh to make it use the right mask. 2). Write a little wrapper program to restart the ssh. -- sshd zombie processes and strange behavior after karmic upgrade https://bugs.launchpad.net/bugs/407428 You received this bug notification because you are a member of Ubuntu Server Team, which is subscribed to openssh in ubuntu. -- Ubuntu-server-bugs mailing list Ubuntu-server-bugs@lists.ubuntu.com Modify settings or unsubscribe at: https://lists.ubuntu.com/mailman/listinfo/ubuntu-server-bugs
[Bug 407428] Re: sshd zombie processes and strange behavior after karmic upgrade
FWIW, I see this as well. A /etc/init.d/ssh restart does clear everything out and ssh is ok for a while. I noticed that nagios tends to aggravate things (/usr/lib/nagios/plugins/check_ssh -4 ), but not immediately after a restart. Eg, I had 883 zombies a moment ago, then I did restart (which cleared them all out), and now I can't trigger it immediately. :( -- sshd zombie processes and strange behavior after karmic upgrade https://bugs.launchpad.net/bugs/407428 You received this bug notification because you are a member of Ubuntu Server Team, which is subscribed to openssh in ubuntu. -- Ubuntu-server-bugs mailing list Ubuntu-server-bugs@lists.ubuntu.com Modify settings or unsubscribe at: https://lists.ubuntu.com/mailman/listinfo/ubuntu-server-bugs
[Bug 407428] Re: sshd zombie processes and strange behavior after karmic upgrade
I am experiencing more strange behavior: When I start aptitude directly with the ssh command, i.e. something like ssh -t r...@machine.box aptitude -V dist-upgrade then I always get "kicked out" after the packages are downloaded, or more precise, I assume directly before dpkg is called. I only have the output in german: Muss 0B/264MB an Archiven herunterladen. Nach dem Entpacken werden 4571kB frei werden. Wollen Sie fortsetzen? [Y/n/?] Schreibe erweiterte Statusinformationen... Fertig Connection to m*.de closed. Sometimes I found zombie dpkg processes after that happened, but not always. If I start an interactive ssh session and then run aptitude, it always works. -- sshd zombie processes and strange behavior after karmic upgrade https://bugs.launchpad.net/bugs/407428 You received this bug notification because you are a member of Ubuntu Server Team, which is subscribed to openssh in ubuntu. -- Ubuntu-server-bugs mailing list Ubuntu-server-bugs@lists.ubuntu.com Modify settings or unsubscribe at: https://lists.ubuntu.com/mailman/listinfo/ubuntu-server-bugs
[Bug 407428] Re: sshd zombie processes and strange behavior after karmic upgrade
Finally, I find this describe the common problem In my first trying to install karmic via network install script and update to the latest version. I found my desktop refuse to interrupt process with Ctrl + c in ssh. It's really hard to use because I only work with sshI was thinking that the debootstrip did not properly configure my system. So I made another try to install via ISO. But the problem did not seem to be fixed. I had to say the problem was disappear in some day's package recently(because I did a daily update). But it was broken again.. I doubt the problem is the settings for kernel in initrd and sshd problem may also relate to that, but I'm not sure. in my system: kernel: 2.6.31-5-generic ssh: Can not job control. VNC: Can not job control. similar to ssh local: job control is ok. -- sshd zombie processes and strange behavior after karmic upgrade https://bugs.launchpad.net/bugs/407428 You received this bug notification because you are a member of Ubuntu Server Team, which is subscribed to openssh in ubuntu. -- Ubuntu-server-bugs mailing list Ubuntu-server-bugs@lists.ubuntu.com Modify settings or unsubscribe at: https://lists.ubuntu.com/mailman/listinfo/ubuntu-server-bugs
[Bug 407428] Re: sshd zombie processes and strange behavior after karmic upgrade
I have been able to reproduce this issue on my hardware. Definitely a regression that needs attention. ** Changed in: openssh (Ubuntu) Importance: Undecided => High ** Changed in: openssh (Ubuntu) Milestone: None => karmic-alpha-5 -- sshd zombie processes and strange behavior after karmic upgrade https://bugs.launchpad.net/bugs/407428 You received this bug notification because you are a member of Ubuntu Server Team, which is subscribed to openssh in ubuntu. -- Ubuntu-server-bugs mailing list Ubuntu-server-bugs@lists.ubuntu.com Modify settings or unsubscribe at: https://lists.ubuntu.com/mailman/listinfo/ubuntu-server-bugs
[Bug 407428] Re: sshd zombie processes and strange behavior after karmic upgrade
as a workaround, when booting with kernel 2.6.28-14 logoff and Ctrl-C/Z work normal. -- sshd zombie processes and strange behavior after karmic upgrade https://bugs.launchpad.net/bugs/407428 You received this bug notification because you are a member of Ubuntu Server Team, which is subscribed to openssh in ubuntu. -- Ubuntu-server-bugs mailing list Ubuntu-server-bugs@lists.ubuntu.com Modify settings or unsubscribe at: https://lists.ubuntu.com/mailman/listinfo/ubuntu-server-bugs
[Bug 407428] Re: sshd zombie processes and strange behavior after karmic upgrade
I don't know if those are the same type of "Signals", but maybe this bug I found is related: https://bugs.launchpad.net/ubuntu/+bug/412972 Could the ones of you that are also affected by the zombie processes try the kill example? -- sshd zombie processes and strange behavior after karmic upgrade https://bugs.launchpad.net/bugs/407428 You received this bug notification because you are a member of Ubuntu Server Team, which is subscribed to openssh in ubuntu. -- Ubuntu-server-bugs mailing list Ubuntu-server-bugs@lists.ubuntu.com Modify settings or unsubscribe at: https://lists.ubuntu.com/mailman/listinfo/ubuntu-server-bugs
[Bug 407428] Re: sshd zombie processes and strange behavior after karmic upgrade
i checked the diff between the jaunty and the karmic version and i can only find 2 options: a) colin's debian patch is making this break (using READ and WRITE respectively instead of RW) b) is a bug in libkrb5-3 -- sshd zombie processes and strange behavior after karmic upgrade https://bugs.launchpad.net/bugs/407428 You received this bug notification because you are a member of Ubuntu Server Team, which is subscribed to openssh in ubuntu. -- Ubuntu-server-bugs mailing list Ubuntu-server-bugs@lists.ubuntu.com Modify settings or unsubscribe at: https://lists.ubuntu.com/mailman/listinfo/ubuntu-server-bugs
[Bug 407428] Re: sshd zombie processes and strange behavior after karmic upgrade
it's not bash. I use tcsh (both on the client and the server) and i'm also impacted. -- sshd zombie processes and strange behavior after karmic upgrade https://bugs.launchpad.net/bugs/407428 You received this bug notification because you are a member of Ubuntu Server Team, which is subscribed to openssh in ubuntu. -- Ubuntu-server-bugs mailing list Ubuntu-server-bugs@lists.ubuntu.com Modify settings or unsubscribe at: https://lists.ubuntu.com/mailman/listinfo/ubuntu-server-bugs
[Bug 407428] Re: sshd zombie processes and strange behavior after karmic upgrade
I can confirm that one /etc/init.d/sshd restart after seems to fix the issue with the zombie processes. -- sshd zombie processes and strange behavior after karmic upgrade https://bugs.launchpad.net/bugs/407428 You received this bug notification because you are a member of Ubuntu Server Team, which is subscribed to openssh in ubuntu. -- Ubuntu-server-bugs mailing list Ubuntu-server-bugs@lists.ubuntu.com Modify settings or unsubscribe at: https://lists.ubuntu.com/mailman/listinfo/ubuntu-server-bugs
[Bug 407428] Re: sshd zombie processes and strange behavior after karmic upgrade
Most of my computers have been upgraded from earlier versions. The only one showing this behaviour is my server which was initially installed with 6.06. Issues are the same as reported: * Ctrl-C and Ctrl-Z do not work * login takes time * logout hangs until I kill it with '~.' * loads of zombie processes About the systems: * both systems are up-to-date karmic. * sshd_config is almost the same as on my laptop (only authorized users differ). * sshd and all its shared libs are identical on both systems. * .bashrc and .bash_logout are the same on both systems * .bash_profile was only present on the server, but removing it does not change the Ctrl-C behaviour If I ssh to my server and then from there ssh back to my laptop, Ctrl-C works... I'll keep looking! -- sshd zombie processes and strange behavior after karmic upgrade https://bugs.launchpad.net/bugs/407428 You received this bug notification because you are a member of Ubuntu Server Team, which is subscribed to openssh in ubuntu. -- Ubuntu-server-bugs mailing list Ubuntu-server-bugs@lists.ubuntu.com Modify settings or unsubscribe at: https://lists.ubuntu.com/mailman/listinfo/ubuntu-server-bugs
[Bug 407428] Re: sshd zombie processes and strange behavior after karmic upgrade
I'm experiencing the same bug, karmic x64, tons of ssh zombies. Happens with interactive and non-interactive shells, and with ssh tunnels. if i restarts the main sshd, it works for a little while, then starts leaving zombies behind. My shell is tcsh (doesn't seem to matter though). If i strace the main sshd while doing a "ssh server echo '$$'", i see: 28640 write(1, "28640\n", 6)= 6<=== my echo 28640 rt_sigprocmask(SIG_SETMASK, NULL, ~[INT KILL ALRM TERM CHLD STOP RTMIN RT_1], 8) = 0 28640 rt_sigprocmask(SIG_SETMASK, ~[KILL ALRM TERM CHLD STOP RTMIN RT_1], NULL, 8) = 0 28640 close(0) = 0 28640 close(1) = 0 28640 close(2) = 0 28640 rt_sigprocmask(SIG_SETMASK, NULL, ~[KILL ALRM TERM CHLD STOP RTMIN RT_1], 8) = 0 28640 rt_sigprocmask(SIG_SETMASK, ~[INT KILL ALRM TERM CHLD STOP RTMIN RT_1], NULL, 8) = 0 28640 exit_group(0) = ?<=== the shell exits properly 28639 <... select resumed> )= 1 (in [11]) 28639 rt_sigprocmask(SIG_BLOCK, [CHLD], ~[KILL ALRM STOP RTMIN RT_1], 8) = 0 28639 rt_sigprocmask(SIG_SETMASK, ~[KILL ALRM STOP RTMIN RT_1], NULL, 8) = 0 28639 read(11, "28640\n", 16384)= 6 28639 select(14, [3 7 11 13], [3], NULL, NULL) = 3 (in [11 13], out [3]) 28639 rt_sigprocmask(SIG_BLOCK, [CHLD], ~[KILL ALRM STOP RTMIN RT_1], 8) = 0 28639 rt_sigprocmask(SIG_SETMASK, ~[KILL ALRM STOP RTMIN RT_1], NULL, 8) = 0 28639 read(11, "", 16384) = 0 28639 close(11) = 0 28639 read(13, "", 16384) = 0 28639 close(13) = 0 28639 write(3, "\315\300.\216\6\313\\\303\360\304\324*\355\332\222\373\266\275\255\275\t\261\",\325\205\3432\25\355\26\214"..., 48) = 48 28639 select(14, [3 7], [3], NULL, NULL) = 1 (out [3]) 28639 rt_sigprocmask(SIG_BLOCK, [CHLD], ~[KILL ALRM STOP RTMIN RT_1], 8) = 0 28639 rt_sigprocmask(SIG_SETMASK, ~[KILL ALRM STOP RTMIN RT_1], NULL, 8) = 0 28639 write(3, "\202T\314[\351\244\33\22\245\361\302NI=Yv\35\375\311h\25\275\272\255fbzH\365\244\247n", 32) = 32 28639 select(14, [3 7], [], NULL, NULL <== the forked sshd expects something from fd 3 or 7 but it never happens ** Changed in: openssh (Ubuntu) Status: Incomplete => Confirmed -- sshd zombie processes and strange behavior after karmic upgrade https://bugs.launchpad.net/bugs/407428 You received this bug notification because you are a member of Ubuntu Server Team, which is subscribed to openssh in ubuntu. -- Ubuntu-server-bugs mailing list Ubuntu-server-bugs@lists.ubuntu.com Modify settings or unsubscribe at: https://lists.ubuntu.com/mailman/listinfo/ubuntu-server-bugs
Re: [Bug 407428] Re: sshd zombie processes and strange behavior after karmic upgrade
On Fri, Jul 31, 2009 at 06:53:30PM -, Michael Helmling wrote: > Rebooting doesn't solve the problem. However, it isn't totally reproducable: > After the last /etc/init.d/ssh restart, I could exit ssh sessions normally > without leaving zombie processes. However, now after another reboot, the > zombies return. So, rebooting is rather counterproductive than helping. ;-) > Right. Could confirm that issuing *one* /etc/init.d/ssh restart after the system has rebooted fixes the issue? -- Mathias Gug Ubuntu Developer http://www.ubuntu.com -- sshd zombie processes and strange behavior after karmic upgrade https://bugs.launchpad.net/bugs/407428 You received this bug notification because you are a member of Ubuntu Server Team, which is subscribed to openssh in ubuntu. -- Ubuntu-server-bugs mailing list Ubuntu-server-bugs@lists.ubuntu.com Modify settings or unsubscribe at: https://lists.ubuntu.com/mailman/listinfo/ubuntu-server-bugs
[Bug 407428] Re: sshd zombie processes and strange behavior after karmic upgrade
Hi Mathias, the system is a physical one. It was installed via ISO, but with some earier ubuntu version, and then upgraded release by release. I've already tried 'aptitude reinstall openssh-server' without success. Rebooting doesn't solve the problem. However, it isn't totally reproducable: After the last /etc/init.d/ssh restart, I could exit ssh sessions normally without leaving zombie processes. However, now after another reboot, the zombies return. So, rebooting is rather counterproductive than helping. ;-) -- sshd zombie processes and strange behavior after karmic upgrade https://bugs.launchpad.net/bugs/407428 You received this bug notification because you are a member of Ubuntu Server Team, which is subscribed to openssh in ubuntu. -- Ubuntu-server-bugs mailing list Ubuntu-server-bugs@lists.ubuntu.com Modify settings or unsubscribe at: https://lists.ubuntu.com/mailman/listinfo/ubuntu-server-bugs