Kernel panic in dovecot-ee-lmtp on Debian 8

[Stephan Bosch]

Op 4/25/2016 om 8:28 PM schreef Michael Slusarz:
> Fixed -- Publicly accessible link to commit:
>
> https://github.com/dovecot/pigeonhole/commit/a95b0579b89c13fb3ee5700e76cbe6a4a3e898e0
>

Oh, oops. :)

>> On April 25, 2016 at 10:46 AM Stephan Bosch <stephan at rename-it.nl> wrote:
>>
>>
>>
>>
>> Op 25-4-2016 om 18:01 schreef Timo Sirainen:
>>> On 25 Apr 2016, at 13:48, Tobi <tobster at brain-force.ch> wrote:
>>>> Hi list
>>>>
>>>> I just realized that that I don not receive all mails in my mailbox
>>>> (running dovecot-ee 2.2.23.1-1 on Debian 8). On my frontend servers
>>>> (running postfix) the queue fills up with mails that cannot be delivered
>>>> via lmtp to my backend servers. The error message on the frontend is
>>>> "lost connection with backend while sending data"
>>>> When I checked the logs on the backend server I found upon every
>>>> delivery attempt kernel panics
>>>>
>>>> Apr 25 12:33:36 mbox1 dovecot: lmtp(REDACTED): Panic: epoll_ctl(del, 18)
>>>> failed: Bad file descriptor
>>>> Apr 25 12:33:36 mbox1 dovecot: lmtp(REDACTED): Error: Raw backtrace:
>>> Can you get a core dump and gdb backtrace? See http://dovecot.org/bugreport.html#coredumps
>>>
>>>> /usr/lib/dovecot/libdovecot-sieve.so.0(program_client_run+0xe8)
>>>> [0x7faa17d3b308] ->
>>>> /usr/lib/dovecot/modules/sieve/lib90_sieve_extprograms_plugin.so(+0x45b8) [0x7faa15d855b8]
>>>> ->
>>>> /usr/lib/dovecot/libdovecot-sieve.so.0(sieve_interpreter_continue+0x7c)
>>>> [0x7faa17cfa2ac] ->
>>>>
>>>> the weird thing is that this is not concerning all incoming mails. From
>>>> time to time the frontends can deliver messages to my backends. I just
>>>> tested it with a mail from work. It arrived via a frontend that has
>>>> other mails in queue that could not be delivered so far.
>>>>
>>>> Does anyone have an idea where I could look for the root cause of this
>>>> panic messages?
>>> Looks like somehow caused by sieve extprograms.
>> Probably this bug:
>>
>> https://git.dovecot.net/pigeonhole/core/commit/a95b0579b89c13fb3ee5700e76cbe6a4a3e898e0
>>
>> Fixed for upcoming release.
>>
>> Regards,
>>
>> Stephan.