Subject: Fw: [Bug 204903] New: unable to create vrf interface when ipv6.disable=1

From: Stephen Hemminger <[email-masked]>
Date: Thu, 19 Sep 2019 10:46:28 +0200

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Date: Wed, 18 Sep 2019 15:15:42 +0000
From: [email-masked]
To: [email-masked]
Subject: [Bug 204903] New: unable to create vrf interface when ipv6.disable=1

https://bugzilla.kernel.org/show_bug.cgi?id=204903

            Bug ID: 204903
           Summary: unable to create vrf interface when ipv6.disable=1
           Product: Networking
           Version: 2.5
    Kernel Version: 5.2.14
          Hardware: All
                OS: Linux
              Tree: Mainline
            Status: NEW
          Severity: normal
          Priority: P1
         Component: Other
          Assignee: [email-masked]
          Reporter: [email-masked]
        Regression: No

`ip link add vrf0 type vrf table 100` fails with EAFNOSUPPORT when boot with
`ipv6.disable=1`. There must be somewhere inside `vrf_newlink` trying to use
IPv6 without checking availablity. Maybe `vrf_add_fib_rules` I guess.

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