Versions Affected : All versions prior to TrueNAS 13.0-U2

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Description

In FreeBSD 13.1, periodic events of type EVFILT_TIMER will return at only half of the requested frequency, following the first event.

The bug may cause misbehaviour in software that makes use of periodic kevent(2)-based timers.

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Workaround

No workaround is available.

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Mitigation

• Upgrade to TrueNAS 13.0-U2 or later.

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Commit

• FreeBSD Revision Hash: c48048ebdbed
• TrueNAS Commit
• JIRA Ticket : NAS-117683

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Further information

• FreeBSD Errata Notice Entry