[Dovecot] Upgrade Problem from 2.0.18 to 2.1.7

[Michael Domann]

hi there,

i'm running a debian wheezy in a chroot at a fritzbox 7230, running with 
freetz. Running well until the upgrade of version 2.1.7 from debian 
repros comming up.

after upgrade, the server comes up, but login is not possible.

Jul 20 20:13:46 master: Warning: Killed with signal 15 (by pid=15309 
uid=0 code=kill)
Jul 20 20:13:46 master: Info: Dovecot v2.1.7 starting up (core dumps 
disabled)
Jul 20 20:14:15 lda: Debug: Loading modules from directory: 
/usr/lib/dovecot/modules
Jul 20 20:14:15 lda: Debug: Loading modules from directory: 
/usr/lib/dovecot/modules
Jul 20 20:14:15 lda: Debug: Module loaded: 
/usr/lib/dovecot/modules/lib90_sieve_plugin.so
Jul 20 20:14:15 lda(mdomann): Debug: Effective uid=1000, gid=1000, 
home=/home/mdomann
Jul 20 20:14:15 lda: Debug: Module loaded: 
/usr/lib/dovecot/modules/lib90_sieve_plugin.so
Jul 20 20:14:15 lda(mdomann): Debug: Namespace : type=private, prefix=, 
sep=, inbox=yes, hidden=no,
list=yes, subscriptions=yes location=maildir:/home/mdomann/Mail:LAYOUT=fs
Jul 20 20:14:15 lda(mdomann): Debug: fs: root=/home/mdomann/Mail, 
index=, control=, inbox=/home/mdom
ann/Mail, alt=
Jul 20 20:14:15 lda(mdomann): Debug: Effective uid=1000, gid=1000, 
home=/home/mdomann
Jul 20 20:14:15 lda(mdomann): Debug: Namespace : type=private, prefix=, 
sep=, inbox=yes, hidden=no,
list=yes, subscriptions=yes location=maildir:/home/mdomann/Mail:LAYOUT=fs
Jul 20 20:14:15 lda(mdomann): Debug: fs: root=/home/mdomann/Mail, 
index=, control=, inbox=/home/mdom
ann/Mail, alt=
Jul 20 20:14:15 lda(mdomann): Debug: userdb lookup skipped, username 
taken from USER environment
Jul 20 20:14:15 lda(mdomann): Debug: none: root=, index=, control=, 
inbox=, alt=
Jul 20 20:14:15 lda(mdomann): Debug: userdb lookup skipped, username 
taken from USER environment
Jul 20 20:14:15 lda(mdomann): Debug: none: root=, index=, control=, 
inbox=, alt=
Jul 20 20:14:16 lda(mdomann): Debug: Destination address: 
mdomann at fritz.fonwlan.box (source: user at ho
stname)
Jul 20 20:14:16 lda(mdomann): Debug: Destination address: 
mdomann at fritz.fonwlan.box (source: user at ho
stname)
Jul 20 20:14:16 lda(mdomann): Debug: sieve: include: sieve_global_dir is 
not set; it is currently no
t possible to include `:global' scripts.
Jul 20 20:14:16 lda(mdomann): Debug: sieve: include: sieve_global_dir is 
not set; it is currently no
t possible to include `:global' scripts.
Jul 20 20:14:16 lda(mdomann): Debug: sieve: using sieve path for user's 
script: /home/mdomann/.dovec
ot.sieve
Jul 20 20:14:16 lda(mdomann): Debug: sieve: using sieve path for user's 
script: /home/mdomann/.dovec
ot.sieve
Jul 20 20:14:16 lda(mdomann): Debug: sieve: opening script 
/home/mdomann/.dovecot.sieve
Jul 20 20:14:16 lda(mdomann): Debug: sieve: opening script 
/home/mdomann/.dovecot.sieve
Jul 20 20:14:16 lda(mdomann): Debug: sieve: script binary 
/home/mdomann/.dovecot.svbin successfully
loaded
Jul 20 20:17:15 imap: Error: dovecot/imap: error while loading shared 
libraries: libpthread.so.0: failed to map segment from shared object: 
Cannot allocate memory
Jul 20 20:17:15 imap: Fatal: master: service(imap): child 22594 returned 
error 127
Jul 20 20:17:15 master: Error: service(imap): command startup failed, 
throttling for 2 secs
Jul 20 20:17:15 imap-login: Error: read(imap) failed: Connection reset 
by peer
Jul 20 20:17:15 imap-login: Info: Internal login failure (pid=22586 
id=1) (internal failure, 1 succesful auths): user=<mdomann>, 
method=PLAIN, rip=192.168.2.105, lip=192.168.2.1, TLS, 
session=<gHEKlUjFNQDAqAJp>

the libary is still there
  fritz:~# ldd /usr/sbin/dovecot

        libdovecot.so.0 => /usr/lib/dovecot/libdovecot.so.0 (0x2aaaa000)
        libc.so.6 => /lib/mips-linux-gnu/libc.so.6 (0x2ab48000)
        libdl.so.2 => /lib/mips-linux-gnu/libdl.so.2 (0x2accc000)
        librt.so.1 => /lib/mips-linux-gnu/librt.so.1 (0x2ace0000)
        /lib/ld.so.1 (0x55550000)
        libpthread.so.0 => /lib/mips-linux-gnu/libpthread.so.0 (0x2acfa000)

the ulimit i have tried, but without success.

root at fritz:/var/mod/root# ulimit -a
-f: file size (blocks)             unlimited
-t: cpu time (seconds)             unlimited
-d: data seg size (kb)             unlimited
-s: stack size (kb)                unlimited
-c: core file size (blocks)        unlimited
-m: resident set size (kb)         unlimited
-l: locked memory (kb)             unlimited
-p: processes                      unlimited
-n: file descriptors               16384
-v: address space (kb)             unlimited
-w: locks                          unlimited

fritz:~# dovecot -n
# 2.0.18: /etc/dovecot/dovecot.conf
# OS: Linux 2.6.28.10 mips Debian wheezy/sid squashfs
base_dir = /var/run/dovecot/
default_client_limit = 100
default_process_limit = 50
default_vsz_limit = 6 M
disable_plaintext_auth = no
lda_mailbox_autocreate = yes
listen = *
log_path = /var/log/dovecot
login_greeting = Dovecot on sysiphus ready.
mail_debug = yes
mail_gid = 1000
mail_location = maildir:/home/mdomann/Mail:LAYOUT=fs
mail_uid = 1000
namespace {
   hidden = no
   inbox = yes
   list = yes
   location =
   prefix =
   subscriptions = yes
   type = private
}
passdb {
   args = scheme=CRYPT username_format=%u /etc/dovecot/users
   driver = passwd-file
}
plugin {
   mail_log_events = delete undelete expunge copy mailbox_delete 
mailbox_rename
   mail_log_fields = uid box msgid size
   sieve = ~/.dovecot.sieve
   sieve_dir = ~/sieve
   sieve_global_path = /etc/dovecot/dovecot.sieve
}
postmaster_address = mdomann at localhost
protocols = " imap"
service anvil {
   client_limit = 210
}
service auth-worker {
   user = $default_internal_user
}
service auth {
   unix_listener /var/spool/postfix/private/auth {
     mode = 0666
   }
   unix_listener auth-userdb {
     group = mdomann
     mode = 0777
     user = mdomann
   }
}
service imap-login {
   inet_listener imap {
     port = 143
   }
   inet_listener imaps {
     port = 993
     ssl = yes
   }
   service_count = 1
}
service lmtp {
   unix_listener lmtp {
     mode = 0666
   }
}
ssl_cert = </etc/ssl/certs/dovecot.pem
ssl_key = </etc/ssl/private/dovecot.pem
syslog_facility = debug
userdb {
   args = username_format=%u /etc/dovecot/users
   driver = passwd-file
}
verbose_proctitle = yes
protocol lda {
   mail_plugins = " sieve"
   syslog_facility = mail
}
protocol imap {
   imap_client_workarounds = tb-extra-mailbox-sep
   imap_idle_notify_interval = 24 mins
   mail_max_userip_connections = 20
}

root at fritz:/var/mod/root# free -m
              total         used         free       shared      buffers
Mem:         59512        52260         7252            0         2452
-/+ buffers:              49808         9704
Swap:       538608         8116       530492


I have no idea to solve this. The question is, is it possible a bug in 
debian wheezy mips or in dovecot. Hopefully someone can point me in the 
right direction.

thanks and regards micha