[Dovecot] child 23925 killed with signal 6

[Jan Behrend]

Dearest list,

just now I migrated a pine user to dovecot.  Nothing special so far, but
then I saw this in my syslog and the user reported, that he got this
error message:

MAIL FOLDER "INBOX" CLOSED DUE TO ACCESS ERROR

Obviously this problem is related to his local filter rules:
If commented out everything works like a charm.  The corresponding
filter rule looks for a "From"-Line in the email header but the filter
string itself is empty.  I know this filter rule does not make a lot of
sense, but nevertheless it shouldn't crash the imap process.  If there
is any additional information you need please ask.

--- snip ---
Nov 16 11:25:07 imap-mgt dovecot: imap(username): Panic: file
istream-header-filter.c: line 520 (i_stream_create_header_filter):
assertion failed: (ret < 0)
Nov 16 11:25:07 imap-mgt dovecot: imap(username): Error: Raw backtrace:
/usr/lib/dovecot/libdovecot.so.0(+0x3e81b) [0x7f82a3bc381b] ->
/usr/lib/dovecot/libdovecot.so.0(+0x3e876) [0x7f82a3bc3876] ->
/usr/lib/dovecot/libdovecot.so.0(i_error+0) [0x7f82a3b9dacf] -> /usr/lib/do
vecot/libdovecot.so.0(i_stream_create_header_filter+0x27b)
[0x7f82a3babf9b] ->
/usr/lib/dovecot/libdovecot-storage.so.0(index_mail_get_header_stream+0x154)
[0x7f82a3e4cf04] ->
/usr/lib/dovecot/libdovecot-storage.so.0(index_storage_search_next_nonblock+0x530)
[0x7f82a3e4e7
e0] ->
/usr/lib/dovecot/libdovecot-storage.so.0(mailbox_search_next_nonblock+0x20)
[0x7f82a3e36630] -> dovecot/imap() [0x416284] ->
dovecot/imap(imap_search_start+0x106) [0x4166f6] ->
dovecot/imap(cmd_search+0xc5) [0x40d535] -> dovecot/imap() [0x41032d] ->
dovecot/imap()
[0x41040d] -> dovecot/imap(client_handle_input+0x135) [0x410635] ->
dovecot/imap(client_input+0x5f) [0x410f5f] ->
/usr/lib/dovecot/libdovecot.so.0(io_loop_handler_run+0xb5)
[0x7f82a3bcf205] -> /usr/lib/dovecot/libdovecot.so.0(io_loop_run+0x18)
[0x7f82a3bce338] -> /usr/lib
/dovecot/libdovecot.so.0(master_service_run+0x13) [0x7f82a3bbd0e3] ->
dovecot/imap(main+0x2d1) [0x418f91] ->
/lib/libc.so.6(__libc_start_main+0xfd) [0x7f82a3436c4d] ->
dovecot/imap() [0x408c39]
Nov 16 11:25:07 imap-mgt dovecot: master: Error: service(imap): child
23925 killed with signal 6 (core not dumped)
--- snip ---

doveconf -n:

# 2.0.7 (3aced5ececd7): /etc/dovecot/dovecot.conf
# OS: Linux 2.6.26-2-amd64 x86_64 Debian 5.0.6 xfs
auth_gssapi_hostname = imap.mpifr-bonn.mpg.de
auth_mechanisms = plain login gssapi
auth_verbose = yes
listen = 134.104.18.77
mail_gid = 40000
mail_location = mdbox:/var/mail/%Ln
mail_uid = 40000
managesieve_notify_capability = mailto
managesieve_sieve_capability = fileinto reject envelope
encoded-character vacation subaddress comparator-i;ascii-numeric
relational regex imap4flags copy include variables body enotify
environment mailbox date
namespace {
  inbox = yes
  location =
  prefix =
  separator = .
}
passdb {
  args = /etc/dovecot/dovecot-ldap-passdb.conf.ext
  driver = ldap
}
plugin {
  sieve = ~/.dovecot.sieve
  sieve_after = /home/global-after.sieve
  sieve_dir = ~/sieve
}
protocols = imap pop3 lmtp sieve
service auth {
  unix_listener auth-userdb {
    group = vmail
  }
}
service lmtp {
  inet_listener lmtp {
    address = 134.104.18.77
    port = 24
  }
}
service managesieve-login {
  inet_listener sieve {
    address = 134.104.18.77
    port = 4190
  }
}
ssl = required
ssl_cert = </etc/ssl/certs/imap-server.pem
ssl_key = </etc/ssl/private/imap-server.key
userdb {
  args = /etc/dovecot/dovecot-ldap-userdb.conf.ext
  driver = ldap
}
protocol lmtp {
  mail_plugins = " sieve"
}
protocol imap {
  ssl_cert = </etc/ssl/certs/imap-server.pem
  ssl_key = </etc/ssl/private/imap-server.key
}
protocol pop3 {
  ssl_cert = </etc/ssl/certs/pop3-server.pem
  ssl_key = </etc/ssl/private/imap-server.key
}

-- 
MAX-PLANCK-INSTITUT fuer Radioastronomie
Jan Behrend - Rechenzentrum
----------------------------------------
Auf dem Huegel 69, D-53121 Bonn
Tel: +49 (228) 525 359, Fax: +49 (228) 525 229
jbehrend at mpifr-bonn.mpg.de http://www.mpifr-bonn.mpg.de

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