I am able to reproduce this on a fresh install some times but not
reliably. It would be great if someone who has some apparmor experience
could have a look at this.
Steps to re-produce:
1. Install Ubuntu 12.04 Server from amd64 ISO in a virtual machine and make
sure it is up to date:
# apt-get update && apt-get upgrade
# reboot
2. Install dovecot imapd and fetchmail for testing:
# apt-get install dovecot-imapd fetchmail
(I possibly needed to issue "service dovecot start" separately.)
3. Create user who receives mail:
# adduser foobar
4. Make mail directories for the user:
# mkdir -p /home/foobar/Maildir/{cur,new,tmp}
5. Send one e-mail to our user:
# (echo From: foo; echo; echo bar) > /home/foobar/Maildir/new/foo
6. Ensure correct ownership:
# chown -R foobar /home/foobar/Maildir
7. Try to retrieve the mail:
# fetchmail --user foobar --mda cat localhost
Observe success. Ignore warning about certificate. The mail should be output to
stdout.
8. Install apparmor-profiles:
# apt-get install apparmor-profiles
9. Reboot to ensure fresh state:
# reboot
10. Send another e-mail:
# (echo From: foo; echo; echo bar) > /home/foobar/Maildir/new/foo2
11. Again, change ownership:
# chown foobar /home/foobar/Maildir/new/foo2
12. Try fetching mail again:
# fetchmail --user foobar --mda cat localhost
You may or may not see a failure here.
13. If there was no failure, open another terminal and log in as foobar, and
create a pile of e-mails:
while true ; do ( echo From: foo; echo; echo bar ) >
/home/foobar/Maildir/new/foo$SECONDS.$RANDOM ; done
Hit ctrl-C after some time.
14. Try fetching mail again:
# fetchmail --user foobar --mda cat localhost
15. If there was no failure, repeat steps 13 and 14 until the failure is
observed. There will be error entries in /var/log/mail.err when the
problem appears.
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You received this bug notification because you are a member of Ubuntu
Server Team, which is subscribed to dovecot in Ubuntu.
https://bugs.launchpad.net/bugs/997269
Title:
dovecot imap broken by apparmor policy
To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/apparmor/+bug/997269/+subscriptions
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