[Bug 294510] ip6_mroute: net.fibs>1 in VNET jails entails a panic

[email protected] Tue, 14 Apr 2026 18:40:22 +0000

Newsgroups	gmane.os.freebsd.devel.net
Message-ID	<[email protected]/bugzilla/>

https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=294510

Zhenlei Huang <[email protected]> changed:

           What    |Removed                     |Added
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                 CC|                            |[email protected],
                   |                            |[email protected]

--- Comment #2 from Zhenlei Huang <[email protected]> ---
vnet_rtables_init() runs at order SI_SUB_PROTO_DOMAIN which is prior to
vnet_mroute_init()'s order SI_SUB_PROTO_MC, so V_mfctables has not been
initialized yet ?

Probably ip6_mroute_rtnumfibs_change() shall check against `V_nmfctables`
firstly.
If `V_nmfctables == 0 || V_mfctables == NULL`, then
ip6_mroute_rtnumfibs_change() shall do nothing.

CC Mark.

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