I plan to issue a PR to MacPorts’s dovecot port with the patch below on macOS 12. Is anyone able to offer a better workaround, or explain the pitfalls of removing these non-working lines? Patch:

--- ./src/lib/restrict-process-size.c 2021-12-19 11:46:50.000000000 -0500 +++ ./src/lib/restrict-process-size.c 2021-12-19 11:49:13.000000000 -0500 @@ -9,18 +9,24 @@ { struct rlimit rlim;

- rlim.rlim_max = rlim.rlim_cur = bytes; - if (setrlimit(RLIMIT_DATA, &rlim) < 0) { - i_fatal("setrlimit(RLIMIT_DATA, %llu): %m", - (unsigned long long)bytes); - }

-#ifdef HAVE_RLIMIT_AS - if (setrlimit(RLIMIT_AS, &rlim) < 0) { - i_fatal("setrlimit(RLIMIT_AS, %llu): %m", - (unsigned long long)bytes); - } -#endif +/* + * Workaround for issue with dovercot version 2.3.17 on macOS 12 + * https://www.mail-archive.com/dovecot@dovecot.org/msg84784.html + * + * rlim.rlim_max = rlim.rlim_cur = bytes; + * if (setrlimit(RLIMIT_DATA, &rlim) < 0) { + * i_fatal("setrlimit(RLIMIT_DATA, %llu): %m", + * (unsigned long long)bytes); + * } + * + * #ifdef HAVE_RLIMIT_AS + * if (setrlimit(RLIMIT_AS, &rlim) < 0) { + * i_fatal("setrlimit(RLIMIT_AS, %llu): %m", + * (unsigned long long)bytes); + * } + * #endif +*/ }

void restrict_process_count(rlim_t count ATTR_UNUSED)

On Dec 19, 2021, at 12:00 PM, Steven Smith wrote:

I confirm that a working workaround on macOS 12 is to simply remove these lines from ./src/lib/restrict-process-size.c:

https://github.com/dovecot/core/blob/a5209c83c3a82386c94d466eec5fea394973e88... https://github.com/dovecot/core/blob/a5209c83c3a82386c94d466eec5fea394973e88...

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On Dec 19, 2021, at 11:26 AM, Steven Smith mailto:steve.t.smith@gmail.com> wrote:

Re: https://www.mail-archive.com/dovecot@dovecot.org/msg84784.html https://www.mail-archive.com/dovecot@dovecot.org/msg84784.html

I just upgraded to macOS 12.1, ran into this issue, and discovered this thread from the error message.

Is there a viable workaround or patch yet?

I tried the workaround in this thread, and still see these issues.

Set default_vsz_limit = 0 in ./conf.d/10-master.conf.

Observe that: dovecot now launches without the setrlimit(RLIMIT_DATA, 268435456) error at the command line However, the mail-err.log is still filled with these errors (below), perhaps for the child processes.

Steve

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Dec 19 11:22:06 imap-login: Error: Dec 19 11:22:06 service(imap-login): Fatal: setrlimit(RLIMIT_DATA, 2147483648): Invalid argument Dec 19 11:22:06 imap-login: Error: Dec 19 11:22:06 service(imap-login): Fatal: setrlimit(RLIMIT_DATA, 2147483648): Invalid argument Dec 19 11:22:06 imap-login: Error: Dec 19 11:22:06 service(imap-login): Fatal: setrlimit(RLIMIT_DATA, 2147483648): Invalid argument Dec 19 11:22:06 imap-login: Error: Dec 19 11:22:06 service(imap-login): Fatal: setrlimit(RLIMIT_DATA, 2147483648): Invalid argument Dec 19 11:22:06 imap-login: Error: Dec 19 11:22:06 service(imap-login): Fatal: setrlimit(RLIMIT_DATA, 2147483648): Invalid argument Dec 19 11:22:06 imap-login: Fatal: master: service(imap-login): child 4629 returned error 89 (Fatal failure) Dec 19 11:22:06 master: Error: service(imap-login): command startup failed, throttling for 2.000 secs Dec 19 11:22:06 imap-login: Fatal: master: service(imap-login): child 4630 returned error 89 (Fatal failure) Dec 19 11:22:06 imap-login: Fatal: master: service(imap-login): child 4628 returned error 89 (Fatal failure) Dec 19 11:22:06 imap-login: Fatal: master: service(imap-login): child 4627 returned error 89 (Fatal failure) Dec 19 11:22:06 imap-login: Fatal: master: service(imap-login): child 4619 returned error 89 (Fatal failure) Dec 19 11:22:06 imap-login: Error: Dec 19 11:22:06 service(imap-login): Fatal: setrlimit(RLIMIT_DATA, 2147483648): Invalid argument Dec 19 11:22:06 imap-login: Fatal: master: service(imap-login): child 4631 returned error 89 (Fatal failure) Dec 19 11:22:09 imap-login: Error: Dec 19 11:22:09 service(imap-login): Fatal: setrlimit(RLIMIT_DATA, 2147483648): Invalid argument Dec 19 11:22:09 imap-login: Fatal: master: service(imap-login): child 4638 returned error 89 (Fatal failure) Dec 19 11:22:09 master: Error: service(imap-login): command startup failed, throttling for 4.000 secs

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On Mon, 1 Nov 2021 14:55:25 +0200, Aki Tuomi said:

I think this is happening because MacOS no longer supports RLIMIT_DATA. We'll try to look into this. default_vsz_limit = 0 seems good enough workaround. Aki