From: Xin Long
Date: Fri, 15 Sep 2017 15:58:33 +0800
> If ipv6 has been disabled from cmdline since kernel started, it makes
> no sense to allow users to create any ip6 tunnel. Otherwise, it could
> some potential problem.
>
> Jianlin found a kernel crash caused by this in
If ipv6 has been disabled from cmdline since kernel started, it makes
no sense to allow users to create any ip6 tunnel. Otherwise, it could
some potential problem.
Jianlin found a kernel crash caused by this in ip6_gre when he set
ipv6.disable=1 in grub:
[ 209.588865] Unable to handle kernel