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ipfw(8) crashes when ext6hdr option is omitted

Description

ipfw(8) crashes when ext6hdr option is omitted

Verify that the option is passed, error out if it's not.
The problem can be trivially triggered with ipfw add allow ext6hdr.

PR: 253169
Reviewed by: kp@
MFC after: 3 days
Differential Revision: https://reviews.freebsd.org/D28447

(cherry picked from commit 682c31db4ecfb8fc6cac0e8ad4945c03379ea3d1)

Details

Provenance
2khramtsov_gmail.comAuthored on Feb 1 2021, 7:03 PM
kpCommitted on Feb 4 2021, 8:13 AM
Differential Revision
D28447: Fix SIGBUS in ipfw(8) when ext6hdr option is omitted.
Parents
rGad6079266683: bridge: fix STP roles and protos strings
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