On 29. Mar 2020, at 17.07, Timo Sirainen <t...@sirainen.com> wrote:
>
>> This is what the log says in the moment of crashing:
>> dovecot: lmtp(53852): Panic: Module context mail_crypt_user_module missing
>> *** backtrace *** (see: https://pastebin.com/YCiFtxmy)
>
> It shows mailbox_free() in the backtrace, so it's probably crashing in
> mail_crypt_mailbox_close()'s MAIL_CRYPT_CONTEXT(box). But looking at the
> code, I can't see how that could be possible. Maybe there is some kind of
> memory corruption or something.
Looks like there's a bug when some users have mail_crypt plugin loaded and
other users don't. If LMTP delivers a mail to both users within the same
session, it crashes at deinit. A workaround could be to tell MTA to deliver to
max recipient at a time. We'll get this fixed also to some future release. You
could also apply a patch:
diff --git a/src/plugins/mail-crypt/mail-crypt-plugin.c
b/src/plugins/mail-crypt/mail-crypt-plugin.c
index 43ece3d3b..a37fb4a35 100644
--- a/src/plugins/mail-crypt/mail-crypt-plugin.c
+++ b/src/plugins/mail-crypt/mail-crypt-plugin.c
@@ -345,7 +345,7 @@ static void mail_crypt_mailbox_close(struct mailbox *box)
{
struct mail_crypt_mailbox *mbox = MAIL_CRYPT_CONTEXT(box);
struct mail_crypt_user *muser =
- MAIL_CRYPT_USER_CONTEXT_REQUIRE(box->storage->user);
+ MAIL_CRYPT_USER_CONTEXT(box->storage->user);
if (mbox->pub_key != NULL)
dcrypt_key_unref_public(&mbox->pub_key);
