Fatal error with IMAP MOVE from a shared mailbox to Trash folder
James Cassell
fedoraproject at cyberpear.com
Tue May 30 18:03:08 EEST 2017
On Tue, Jan 3, 2017, at 06:14 PM, Aki Tuomi wrote:
>
>
> On 12/27/2016 06:35 PM, Daniele Barresi wrote:
> > Hello everyone.
> > I have a problem using Dovecot 2.2.26 with ACL plugin and deleting e-mails
> > from a shared mailbox.
> >
> > My user doesn't have the "expunge" permission on the shared mailbox, but it
> > has the "write-deleted" permission. So, when I delete a message from the
> > shared mailbox using a client that implements the IMAP MOVE command, it
> > tries to move the message to my Trash folder. Then the server closes the
> > connection to the client (process aborted) and I get three lines in the log
> > file with a backtrace and "Fatal" error. In this case the message doesn't
> > get copied or moved from the shared folder and the client complaints. I
> > found the same thing happens whenever I try to move anything between
> > folders of the shared mailbox itself, while logged in with my user. I can
> > move messages inside my own mailbox just fine.
> >
> > If I try the same operation from a client that uses the IMAP COPY + DELETE
> > commands, no errors are logged and the outcome is as expected: the message
> > gets copied from the shared folder to my Trash and gets the flag "\Deleted"
> > set on the shared folder.
> >
> > My setup is as follows:
> >
> > Dovecot: 2.2.26.0
> > OS: Ubuntu 16.04.1 LTS
> > CPU architecture: x86_64
> > Filesystem: ext4
> >
> >
> > The relevant lines from mail.err log:
> >
> > Dec 27 15:21:18 dovecot dovecot: imap(danielebarresi): Panic: file
> > mail-storage.c: line 2143 (mailbox_save_context_reset): assertion failed:
> > (ctx->copying_via_save)
> > Dec 27 15:21:18 dovecot dovecot: imap(danielebarresi): Error: Raw
> > backtrace: /usr/lib/dovecot/libdovecot.so.0(+0x9438e) [0x7fbcd478538e] ->
> > /usr/lib/dovecot/libdovecot.so.0(+0x9447c) [0x7fbcd478547c] ->
> > /usr/lib/dovecot/libdovecot.so.0(i_fatal+0) [0x7fbcd471ea4e] ->
> > /usr/lib/dovecot/libdovecot-storage.so.0(+0x41b78) [0x7fbcd4a50b78] ->
> > /usr/lib/dovecot/libdovecot-storage.so.0(mailbox_save_cancel+0x73)
> > [0x7fbcd4a53d73] -> /usr/lib/dovecot/modules/lib01_acl_plugin.so(+0xe142)
> > [0x7fbcd3f1d142] -> /usr/lib/dovecot/libdovecot-storage.so.0(+0x4516d)
> > [0x7fbcd4a5416d] ->
> > /usr/lib/dovecot/libdovecot-storage.so.0(mailbox_move+0x23)
> > [0x7fbcd4a54333] -> dovecot/imap(+0xf9c5) [0x557cf98629c5] ->
> > dovecot/imap(command_exec+0xa6) [0x557cf986f196] -> dovecot/imap(+0x1a4c2)
> > [0x557cf986d4c2] -> dovecot/imap(+0x1a550) [0x557cf986d550] ->
> > dovecot/imap(client_handle_input+0x195) [0x557cf986d915] ->
> > dovecot/imap(client_input+0x85) [0x557cf986de25] ->
> > /usr/lib/dovecot/libdovecot.so.0(io_loop_call_io+0x4c) [0x7fbcd4799bdc] ->
> > /usr/lib/dovecot/libdovecot.so.0(io_loop_handler_run_internal+0x10a)
> > [0x7fbcd479b09a] ->
> > /usr/lib/dovecot/libdovecot.so.0(io_loop_handler_run+0x25) [0x7fbcd4799c65]
> > -> /usr/lib/dovecot/libdovecot.so.0(io_loop_run+0x38) [0x7fbcd4799e08] ->
> > /usr/lib/dovecot/libdovecot.so.0(master_service_run+0x13) [0x7fbcd4724f53]
> > -> dovecot/imap(main+0x322) [0x557cf9860ca2] ->
> > /lib/x86_64-linux-gnu/libc.so.6(__libc_start_main+0xf0) [0x7fbcd4348830] ->
> > dovecot/imap(+0xde1f) [0x557cf9860e1f]
> > Dec 27 15:21:18 dovecot dovecot: imap(danielebarresi): Fatal: master:
> > service(imap): child 6907 killed with signal 6 (core dumped)
> >
> >
> > Dovecot configuration (doveadm -n):
> >
> > # 2.2.26.0 (23d1de6): /etc/dovecot/dovecot.conf
> > # Pigeonhole version 0.4.16 (fed8554)
> > # OS: Linux 4.4.0-57-generic x86_64 Ubuntu 16.04.1 LTS
> > auth_cache_negative_ttl = 10 mins
> > auth_cache_size = 2 M
> > auth_master_user_separator = *
> > auth_mechanisms = plain login
> > first_valid_uid = 12
> > last_valid_uid = 12
> > mail_location = maildir:~/Maildir
> > mail_plugins = acl quota notify mail_log stats lazy_expunge
> > 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 index ihave
> > duplicate mime foreverypart extracttext
> > namespace casellecondivise {
> > list = children
> > location = maildir:%%h/Maildir:INDEXPVT=~/Maildir/shared/%%u
> > prefix = Caselle condivise/%%u/
> > separator = /
> > subscriptions = no
> > type = shared
> > }
> > namespace expunged {
> > hidden = yes
> > list = no
> > location = maildir:/var/expunged/%n/Expunged
> > prefix = EXPUNGED/
> > separator = /
> > }
> > namespace inbox {
> > inbox = yes
> > location =
> > mailbox Archive {
> > auto = subscribe
> > special_use = \Archive
> > }
> > mailbox Drafts {
> > auto = subscribe
> > special_use = \Drafts
> > }
> > mailbox Junk {
> > auto = subscribe
> > special_use = \Junk
> > }
> > mailbox Sent {
> > auto = subscribe
> > special_use = \Sent
> > }
> > mailbox Trash {
> > auto = subscribe
> > special_use = \Trash
> > }
> > prefix =
> > separator = /
> > type = private
> > }
> > passdb {
> > args = /etc/dovecot/dovecot-ldap.conf.ext
> > driver = ldap
> > }
> > plugin {
> > acl = vfile:/etc/dovecot/global-acls:cache_secs=300
> > acl_shared_dict = file:/etc/dovecot/shared/shared-mailboxes
> > lazy_expunge = EXPUNGED/
> > lazy_expunge_only_last_instance = yes
> > mail_log_events = delete copy flag_change save undelete expunge
> > mail_log_fields = uid box msgid size
> > quota = maildir:user quota
> > quota_exceeded_message = (Quota exceeded) La casella di posta elettronica
> > del destinatario è piena.
> > quota_rule = *:storage=1G
> > quota_rule2 = Trash:storage=+100M
> > quota_warning = storage=95%% quota-warning 95 %u
> > quota_warning2 = storage=100%% quota-warning 100 %u
> > sieve = file:~/sieve;active=~/.dovecot.sieve
> > stats_command_min_time = 1 mins
> > stats_domain_min_time = 12 hours
> > stats_ip_min_time = 12 hours
> > stats_memory_limit = 32 M
> > stats_refresh = 30 secs
> > stats_session_min_time = 15 mins
> > stats_track_cmds = yes
> > stats_user_min_time = 1 hours
> > }
> > protocols = " imap sieve"
> > service auth {
> > unix_listener /var/spool/postfix/private/auth {
> > group = mail
> > mode = 0666
> > user = postfix
> > }
> > unix_listener auth-userdb {
> > group = mail
> > user = mail
> > }
> > }
> > service dict {
> > unix_listener dict {
> > group = mail
> > mode = 0600
> > user = mail
> > }
> > }
> > service imap-login {
> > process_limit = 300
> > process_min_avail = 2
> > }
> > service managesieve-login {
> > inet_listener sieve {
> > port = 4190
> > }
> > }
> > service quota-warning {
> > executable = script /etc/dovecot/scripts/quota-warning.sh
> > unix_listener quota-warning {
> > group = mail
> > user = mail
> > }
> > }
> > service stats {
> > fifo_listener stats-mail {
> > mode = 0600
> > user = mail
> > }
> > }
> > ssl = required
> > ssl_cert = </etc/ssl/certs/pac.apg23.org.pem
> > ssl_key = # hidden, use -P to show it
> > userdb {
> > args = /etc/dovecot/dovecot-sql.conf.ext
> > default_fields = uid=mail gid=mail home=/var/mail/%u master_user=%u
> > driver = sql
> > }
> > userdb {
> > args = /etc/dovecot/dovecot-ldap.conf.ext
> > default_fields = uid=mail gid=mail home=/var/mail/%u master_user=%u
> > driver = ldap
> > }
> > protocol lda {
> > mail_plugins = acl quota notify mail_log stats lazy_expunge sieve
> > }
> > protocol imap {
> > mail_max_userip_connections = 25
> > mail_plugins = acl quota notify mail_log stats lazy_expunge imap_quota
> > imap_stats
> > }
> >
> > I tested this with different users with the same result.
> > I tested and reproduced the error with Thunderbird and Roundcube.
> > The Apple Mail client uses IMAP COPY + DELETE, instead of IMAP MOVE, and no
> > errors are reported. So I think it's related to the IMAP MOVE
> > implementation on Dovecot server.
> >
> >
> > Has anyone seen the same error?
> > Any suggestions? Is this a Dovecot bug?
> >
> > ---
> > Daniele Barresi
> Hi!
>
> We'll open a bug on this. Thanks for reporting it.
>
> Aki
Hello,
I'm also seeing this error on Dovecot 2.2.27 from Debian jessie-backports. The error seems to come up when trying to move FROM a folder for which the user doesn't have the EXPUNGE ACL. It doesn't have to be a shared folder (and in my case, it is not a shared folder.) My workaround is to not advertise the MOVE capability, but long-term, it's better to fix the crash.
V/r,
James Cassell
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