Versions Affected : All versions prior to TrueNAS 12.0-U2

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Description

Insufficient locking in the kernel meant that destroying an epair and a vnet jail at the same time often resulted in panics.

Users with root level access (or the PRIV_NET_IFCREATE privilege) can panic the system.

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Workaround

The panic can be avoided by ensuring that epair interfaces are fully destroyed before the vnet jails containing them are destroyed. Systems not using vnet jails are not affected.

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Mitigation

• Upgrade to TrueNAS 12.0-U2 or later.

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Commit

• FreeBSD Revision : r369172
• TrueNAS Commit : ddd70e3
• TrueNAS Commit : b7ecde2
• JIRA Ticket : NAS-109168

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Further information

• FreeBSD Errata Entry