kqueue crash on FreeBSD with 2.2.25

[Timo Sirainen]

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?

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