Versions Affected : All versions prior to TrueNAS 12.0-U8

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Description

Operations specific to TLB invalidation in PCID mode were misordered with respect to IPI transmission.

This issue may cause stale TLB translation entries (and hence invalid data) in multithreaded applications, leading to application misbehaviour.

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Workaround

PCID may be disabled by adding the following line to /boot/loader.conf: vm.pmap.pcid_enabled=0

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Mitigation

• Upgrade to TrueNAS 12.0-U8 or later.

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Commit

• FreeBSD Revision : r370980
• TrueNAS Commit : 95864ee
• TrueNAS Commit : c25fe91
• JIRA Ticket : NAS-114278

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Further information

• FreeBSD Errata Notice Entry