[Dovecot] crashes on 2.0.16

[Cor Bosman]

Hey all, I upgraded some servers today from Debian Lenny to Debian Squeeze, and after the upgrade I started getting dovecot crashes.  I was on 2.0.13 but got these there as well, and hoped upgrading to 2.0.16 would help. It didn't. Anyone have an idea?

Cor



Dec 18 23:32:21 userimap1 kernel: [263492.245530] __ratelimit: 122 callbacks suppressed
Dec 18 23:32:21 userimap1 kernel: [263492.245536] imap[19665]: segfault at 7f108efb7f60 ip 00007f108ecd37e0 sp 00007fff73c3d658 error 5 in libc-2.11.2.so[7f108ec5d000+158000]
Dec 18 23:32:21 userimap1 kernel: [263492.245663] BUG: Bad page map in process imap  pte:00000001 pmd:09767067
Dec 18 23:32:21 userimap1 kernel: [263492.252563] page:ffffea0000000000 flags:(null) count:-84 mapcount:-84 mapping:(null) index:0
Dec 18 23:32:21 userimap1 kernel: [263492.261186] addr:00007f108ef46000 vm_flags:08000070 anon_vma:(null) mapping:ffff88012b6e5238 index:2e9
Dec 18 23:32:21 userimap1 kernel: [263492.270804] vma->vm_ops->fault: filemap_fault+0x0/0x460
Dec 18 23:32:21 userimap1 kernel: [263492.276172] vma->vm_file->f_op->mmap: generic_file_mmap+0x0/0x60
Dec 18 23:32:21 userimap1 kernel: [263492.282424] Pid: 19665, comm: imap Tainted: G    B      2.6.32.36-xsserver #1
Dec 18 23:32:21 userimap1 kernel: [263492.282429] Call Trace:
Dec 18 23:32:21 userimap1 kernel: [263492.282441]  [<ffffffff81103ee5>] print_bad_pte+0x1d5/0x280
Dec 18 23:32:21 userimap1 kernel: [263492.282448]  [<ffffffff8110568a>] unmap_vmas+0xa1a/0xa20
Dec 18 23:32:21 userimap1 kernel: [263492.282458]  [<ffffffff8137e501>] ? sch_direct_xmit+0x81/0x1d0
Dec 18 23:32:21 userimap1 kernel: [263492.282465]  [<ffffffff8110b60d>] exit_mmap+0xbd/0x190
Dec 18 23:32:21 userimap1 kernel: [263492.282473]  [<ffffffff81059cbd>] mmput+0x4d/0x120
Dec 18 23:32:21 userimap1 kernel: [263492.282481]  [<ffffffff8105f282>] exit_mm+0x112/0x150
Dec 18 23:32:21 userimap1 kernel: [263492.282488]  [<ffffffff8106104d>] do_exit+0x13d/0x800
Dec 18 23:32:21 userimap1 kernel: [263492.282496]  [<ffffffff81072f31>] ? __dequeue_signal+0xe1/0x200
Dec 18 23:32:21 userimap1 kernel: [263492.282503]  [<ffffffff81061765>] do_group_exit+0x55/0xd0
Dec 18 23:32:21 userimap1 kernel: [263492.282510]  [<ffffffff81075251>] get_signal_to_deliver+0x1e1/0x3e0
Dec 18 23:32:21 userimap1 kernel: [263492.282517]  [<ffffffff8100b315>] do_signal+0x75/0x7d0
Dec 18 23:32:21 userimap1 kernel: [263492.282523]  [<ffffffff81103203>] ? print_vma_addr+0xb3/0x120
Dec 18 23:32:21 userimap1 kernel: [263492.282533]  [<ffffffff8143856e>] ? printk+0x41/0x43
Dec 18 23:32:21 userimap1 kernel: [263492.282541]  [<ffffffff81036436>] ? __bad_area_nosemaphore+0xf6/0x1e0
Dec 18 23:32:21 userimap1 kernel: [263492.282547]  [<ffffffff810365ee>] ? bad_area_access_error+0x4e/0x60
Dec 18 23:32:21 userimap1 kernel: [263492.282553]  [<ffffffff8100bac7>] do_notify_resume+0x57/0x60
Dec 18 23:32:21 userimap1 kernel: [263492.282559]  [<ffffffff8100cadc>] retint_signal+0x48/0x8c



# 2.0.16: /usr/local/etc/dovecot/dovecot.conf
# OS: Linux 2.6.32.36-xsserver x86_64 Debian 6.0.3 
auth_cache_size = 1 M
auth_verbose = yes
base_dir = /var/run/dovecot/
default_vsz_limit = 2 G
disable_plaintext_auth = no
first_valid_uid = 20
lock_method = dotlock
login_greeting = User-IMAP ready.
login_trusted_networks = 194.109.26.128/27
mail_fsync = always
mail_nfs_index = yes
mail_nfs_storage = yes
mailbox_idle_check_interval = 1 mins
maildir_stat_dirs = yes
mmap_disable = yes
namespace {
  inbox = yes
  location = maildir:%Nu:INDEX=/var/spool/mail/dovecot-control/indexes/%1u/%2u/%u:INBOX=%Nu:CONTROL=/var/spool/mail/dovecot-control/%1u/%2u/%u/INBOX
  prefix = 
  separator = /
  type = private
}
passdb {
  args = /usr/local/etc/dovecot/dovecot.masterusers
  driver = passwd-file
  master = yes
}
passdb {
  args = cache_key=%u%r dovecot
  driver = pam
}
plugin {
  quota = fs:User quota
}
protocols = imap
service auth {
  client_limit = 5000
}
service imap-login {
  process_min_avail = 8
  service_count = 0
  vsz_limit = 2 G
}
service imap {
  process_limit = 4096
  vsz_limit = 2 G
}
shutdown_clients = no
ssl_cert = </etc/ssl/certs/xx
ssl_key = </etc/ssl/private/xx
userdb {
  driver = passwd
}
verbose_proctitle = yes
protocol imap {
  imap_capability = IMAP4rev1 LITERAL+ SASL-IR LOGIN-REFERRALS ID ENABLE SORT SORT=DISPLAY THREAD=REFERENCES THREAD=REFS MULTIAPPEND UNSELECT IDLE CHILDREN NAMESPACE UIDPLUS LIST-EXTENDED I18NLEVEL=1 CONDSTORE QRESYNC ESEARCH ESORT SEARCHRES WITHIN CONTEXT=SEARCH LIST-STATUS
  imap_client_workarounds = delay-newmail
  mail_max_userip_connections = 24
  mail_plugins = " quota imap_quota"
}