ipv6: do not set routes if disable_ipv6 has been enabled
Do not allow setting ipv6 routes from userspace if disable_ipv6 has been enabled. The issue can be triggered using the following reproducer: - sysctl net.ipv6.conf.all.disable_ipv6=1 - ip -6 route add a:b:c:d::/64 dev em1 - ip -6 route show a:b:c:d::/64 dev em1 metric 1024 pref medium Fix it checking disable_ipv6 value in ip6_route_info_create routine Signed-off-by: Lorenzo Bianconi <lorenzo.bianconi@redhat.com> Signed-off-by: David S. Miller <davem@davemloft.net>
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