[Dovecot] dovecot-auth hangs with IO leak

[Alan Tam]

  On 2005-02-03 23:59, Alan Tam wrote:

>Hi dovecot,
>
>I am using the debian dovecot packages on a system running LDAP.
>
>My /etc/pam.d/common-* looks like this, which simply means try /etc/passwd first, and try LDAP using the same password if it is failed. 
>
>account [success=1 default=ignore] pam_unix.so
>account required pam_ldap.so use_first_pass
>account required pam_permit.so
>auth    [success=1 default=ignore] pam_unix.so
>auth    required pam_ldap.so use_first_pass
>auth    required pam_permit.so
>session [success=1 default=ignore] pam_unix.so
>session required pam_ldap.so use_first_pass
>session required pam_mkhomedir.so skel=/etc/skel umask=0002
>session required pam_permit.so
>
>When many LDAP users login, /var/log/auth.log shows many (expected) error like: (note "pam_unix")
>Feb  3 18:16:15 eta dovecot-auth: (pam_unix) authentication failure; logname= uid=0 euid=0 tty= ruser= rhost=127.0.0.1
>Feb  3 18:16:19 eta dovecot-auth: (pam_unix) check pass; user unknown
>
>After recent upgrades from probably 0.99.10 to 0.99.13, these lines begin to appear in /var/log/mail.log:
>
>Feb  3 16:31:00 eta dovecot-auth: Login process has too old (123s) requests, killing it.
>Feb  3 16:31:00 eta dovecot-auth: Login process has too old (124s) requests, killing it.
>
>And some more like this, which shows the problem:
>Feb  3 16:45:23 eta dovecot-auth: I/O leak: 0x8054940 (13)
>Feb  3 16:45:23 eta dovecot-auth: I/O leak: 0x8054940 (14)
>Feb  3 16:45:23 eta dovecot-auth: I/O leak: 0x8054940 (15)
>
>The problem can be solved by changing /etc/pam.d/dovecot to:
>auth    required pam_ldap.so
>account required pam_ldap.so
>session required pam_mkhomedir.so skel=/etc/skel umask=0002
>session required pam_ldap.so
>This change means PAM not fail auth for /etc/passwd again.
>
>I think dovecot has some problem dealing with the pam_unix + pam_ldap configuration. Do you have any idea?
>
>I am Cc-ing this message to the corresponding bug in Debian BTS.
>  
>
Solved by configuring dovecot to directly authenticate from LDAP. I 
still think it is your bug though.

It is not a good solution anyway, since your LDAP authenticator doesn't 
support auth-bind. So I've to convert all userPassword into {CRYPT} 
format for it to work.

-- 
Regards,
Alan

Answer: Because we read from top to bottom, from left to right.
Question: Why should we put replies after the original text?

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