kqueue crash on FreeBSD with 2.2.25

[Aki Tuomi]

On 04.07.2016 06:14, Edgar Pettijohn wrote:
> On 16-07-03 03:30:36, Timo Sirainen wrote:
>> On 02 Jul 2016, at 03:30, Adam Weinberger <adamw at adamw.org> wrote:
>>>>> Jul  1 10:07:27 imap dovecot: master: Panic: kevent(EV_ADD, READ, 54) failed: Bad file descriptor
>>>>>
>>>>> It's not dumping core, and I get the message even with "protocols ="
>>>>>
>>>>> Downgrading back to 2.2.24 fixes it. What info would be helpful for me to provide here?
>>>> gdb backtrace: http://dovecot.org/bugreport.html#coredumps
>>>>
>>> Fuller logs attached. Thanks for your help, Timo.
>>>
>>> #6  0x2815b23a in i_panic (format=0x281ccf7a "kevent(EV_ADD, READ, %d) failed: %m") at failures.c:275
>>> #7  0x28185e10 in io_loop_handle_add (io=0x288843a0) at ioloop-kqueue.c:67
>>> #8  0x281815a8 in io_add_file (fd=56, condition=IO_READ, source_linenum=244, callback=0x2818a7d0 <signal_read>, context=0x0) at ioloop.c:59
>>> #9  0x281813a6 in io_add (fd=56, condition=IO_READ, source_linenum=244, callback=0x2818a7d0 <signal_read>, context=0x0) at ioloop.c:81
>>> #10 0x2818a666 in lib_signals_set_handler (signo=1, flags=3, handler=0x804e6c0 <sig_settings_reload>, context=0x0) at lib-signals.c:243
>>> #11 0x0804e129 in main_init (set=0x2881d098) at main.c:518
>>> #12 0x0804d562 in main (argc=3, argv=0xffffae08) at main.c:890
>> Weird. I haven't touched anything even close to that. Also kqueue works on my OSX. The only thing that comes to my mind is https://github.com/dovecot/core/commit/fde7b8a03bf91cfa5bb7ca3e84545386243fa0d2
>>
>> Does it happen to work if you use the attached patch?
>>
> Still trying to learn git, but here is what happened when I tried applying this diff.
>
> Sun Jul 03 10:12:32 ~/dovecot/core $ git reset --hard 3fea4d5988de365503df44a9b067e3b181cac65c 
> HEAD is now at 3fea4d5 master: Stopping didn't close dead-pipes early enough.
> Sun Jul 03 10:12:37 ~/dovecot/core $ git apply diff.patch                                      
> error: patch failed: src/master/service-monitor.c:522
> error: src/master/service-monitor.c: patch does not apply
> error: patch failed: src/master/service-monitor.c:452
> error: src/master/service-monitor.c: patch does not apply
> error: patch failed: src/master/service-process.c:133
> error: src/master/service-process.c: patch does not apply
> error: patch failed: src/master/service.c:283
> error: src/master/service.c: patch does not apply
> error: patch failed: src/master/service.h:85
> error: src/master/service.h: patch does not apply
>
> Same thing happened before the reset --hard.
>
I don't think Timo intended you to apply this as patch, but rather that
it's probably what's causing it.

Aki