On Wed, Dec 06, 2006 at 09:18:38AM -0300, Alvaro Herrera wrote:
> Gerrit Pape wrote:
> > On Thu, Nov 23, 2006 at 07:20:09PM -0300, Alvaro Herrera wrote:
> > > The authentication process eats all available CPU power and does not
> > > return success, even when the given password is correct. strace'ing the
> > > process shows this output:
> >
> > Hi Alvaro,
> >
> > I cannot reproduce the problem.
>
> Hmm, maybe it's because of the architecture? I'm on an AMD64 here.
Yes, probably, I'm on powerpc. Unfortunately I don't have an AMD64
system to test with.
> > This is what I did:
> >
> > # apt-get install twoftpd-run lftp
> > ...
> > # sv stat twoftpd
> > run: twoftpd: (pid 21318) 185s; run: log: (pid 21317) 185s
> > #
>
> $ sudo aptitude install twoftpd-run lftp
>
> This starts the server automatically:
>
> $ ps xuaw | grep ftp
> root 1771 0.0 0.0 104 28 ? Ss 09:08 0:00 runsv twoftpd
> ftplog 1772 0.0 0.0 128 44 ? S 09:08 0:00 svlogd -t
> /var/log/twoftpd
> root 1773 0.0 0.0 6792 948 ? S 09:08 0:00 tcpsvd -v
> -llocalhost 0 21 chpst -m3000000 -e./env twoftpd-auth cvm-unix twoftpd-xfer
> alvherre 1778 0.0 0.0 5216 772 pts/9 R+ 09:08 0:00 grep ftp
>
> Then I try to connect:
>
> $ lftp -u alvherre localhost
> Password:
> lftp [EMAIL PROTECTED]:~> ls
> `ls' at 0 [Sending commands...]
> It sticks here and I see the CPU at 100% in a CPU monitor. This
> line is replaced with the next one when I C-c:
> Interrupted
> lftp [EMAIL PROTECTED]:~> exit
>
> On the "ls" command, I see the CPU pegged at 100%. When I exit lftp,
> the CPU is still at 100%. The guilty process is twoftpd-auth:
>
> $ ps u -C twoftpd-auth
> USER PID %CPU %MEM VSZ RSS TTY STAT START TIME COMMAND
> root 1958 97.9 0.0 2660 380 ? R 09:13 1:08 twoftpd-auth
> cvm-unix twoftpd-xfer
>
>
> > Do you use the twoftpd-run package? Please post the startup script for
> > twoftpd you're using, and the configuration.
>
> Yes. The configuration is the default, I think, and certainly the
> startup script is. (It was started by "aptitude" or dpkg).
Ok, that's good. Can you please strace the complete command chain?
Please change the final line in /var/service/twoftpd/run to
...
strace -f -o/tmp/trace twoftpd-auth cvm-unix twoftpd-xfer
restart the service with
# sv restart twoftpd
try to connect and 'ls' again, and then send the complete strace output
from /tmp/trace to this bug report?
Thanks, Gerrit.
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