Good morning,
I've figured out what the issue is. Sadly the Cyrus 3 upgrade guide is
quite lacking. The segfault mentioned before is caused by outdated sieve
script bytecode. You need to manually recompile all sieve scripts using:
su cyrus -c '/usr/lib/cyrus/upgrade/masssievec /usr/lib/cyrus/bin/sievec'
Furthermore sieve script paths have changed. Again this doesn't appear
to be mentioned in the upgrade guides. I was aware of this change before
filing this bug, but didn't bring it up here, since it seemed
irrelevant. It is not, since my migration is what actually caused the
issue. This should be fixed using Debian maintainer scripts as well
since the current state will cause data loss and unexpected behaviour,
because existing sieve scripts will be inaccessible to (non-root) users
and no longer do their job. You can migrate the paths using:
find /var/spool/sieve/ -type d -regextype sed -regex '.*/[^/]\+^[^/]\+'
-print | awk '{system("mv " $0 " " gensub("\\^", ".", "g", $1))}'
(This is a bit of hack that only takes our setups into account. Might
need changes for the broader Debian ecosystem)
Don't forget to recompile the scripts with the command above afterwards.
This leaves me with 2 more issues: Vacation still doesn't appear to work
correctly. I'd kindly ask someone to help me look into that. We also
appear to have issues with squatter, but I'm not quite ready yet to make
statements about that publicly.
P.S. I don't usually do lower level programming, but from my
understanding there is at least a chance that the segfault might cause
security issues that could potentially be exploited, since sieve scripts
are indirectly created by unprivileged users. I leave that assessment to
somebody else.
--
Kind regards,
Kim-Alexander Brodowski
IServ GmbH
Bültenweg 73
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E-Mail: kim.brodow...@iserv.eu
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