zabbix_sender (6.0.0～6.0.2) exits w/o releasing semaphore on FreeBSD 13.0

[Tomohide]

Zabbix_sender in Zabbix 6 exits without releasing the semaphore it used on my FreeBSD 13.0 system.
I checked the phenomenon with 'ipcs -s'.
Zabbix_sender in Zabbix 5.4.11 or below exits normally after releasing the semaphore it used.

I experienced the same situation on my Gentoo Linux system too.

But, zabbix_sender in Zabbix 6 exit with no problem on my Fedora 35, Ubuntu 20.04, Debian 11 or Arch Linux system.

I found the Asymmetric usage of zbx_locks_* in zabbix_sender.c.

• Initializing locks uses zbx_locks_create(&error) #ifndef _WINDOWS on l.1508 and l.1509
• Finalizing locks uses zbx_locks_disable() #if !defined(_WINDOWS) && defined(HAVE_PTHREAD_PROCESS_SHARED) on l.1868 and l.1869

HAVE_PTHREAD_PROCESS_SHARED appears only at finalizing, and zabbix_sender.c uses zabbix_locks_create() and zabbix_locks_disable().

In mutex.h, zbx_locks_enable() seems to be paired with zbx_locks_disable(), and zbx_locks_create() seems to be paired with zbx_locks_destroy().

So, I changed the zabbix_sender.c like the appended patch, and patched zabbix_sender just exits normally after releasing the semaphore it used
on my FreeBSD 13.0 system.

Does anyone experience semaphore issues on zabbix_sender?

[cyber]

It would be better to report here https://support.zabbix.com/projects/ZBX/

[Tomohide]

Thank you for your suggestion.
I'm going to the issue and patch to the URL above.