[Bug 1983197] Re: syslog flooded with "Error do-add-ip6-address" "faiilure 95" despite sysctl disabled ipv6

[Javiar C]

Upgraded to Ubuntu 22 from 20, disabled ipv6, similar log file flood:

sysctl -w net.ipv6.conf.all.disable_ipv6=1

Sep 29 12:48:36 srv NetworkManager[663]: <warn>  [1664480916.5924] platform-linux: do-add-ip6-address[2: fe80::adf1:51d0:38ef:c006]: failure 13 (Permission denied)
Sep 29 12:48:38 srv NetworkManager[663]: <warn>  [1664480918.5949] platform-linux: do-add-ip6-address[2: fe80::4972:49dc:5b46:4b9e]: failure 13 (Permission denied)
Sep 29 12:48:40 srv NetworkManager[663]: <warn>  [1664480920.5974] platform-linux: do-add-ip6-address[2: fe80::1588:e1f5:b91d:6585]: failure 13 (Permission denied)
Sep 29 12:48:42 srv NetworkManager[663]: <warn>  [1664480922.5998] platform-linux: do-add-ip6-address[2: fe80::cc8e:c60b:a398:cfd7]: failure 13 (Permission denied)
Sep 29 12:48:44 srv NetworkManager[663]: <warn>  [1664480924.6023] platform-linux: do-add-ip6-address[2: fe80::7123:5dfa:db2d:8fe3]: failure 13 (Permission denied)
Sep 29 12:48:46 srv NetworkManager[663]: <warn>  [1664480926.6037] platform-linux: do-add-ip6-address[2: fe80::525:da2:463b:6812]: failure 13 (Permission denied)
Sep 29 12:48:48 srv NetworkManager[663]: <warn>  [1664480928.6051] ipv6ll[ea9e44a59a9d45e5,ifindex=2]: changed: no IPv6 link local address to retry after Duplicate Address Detection failures (back off)
Sep 29 12:48:58 srv NetworkManager[663]: <warn>  [1664480938.6088] platform-linux: do-add-ip6-address[2: fe80::adf1:51d0:38ef:c006]: failure 13 (Permission denied)
Sep 29 12:49:00 srv NetworkManager[663]: <warn>  [1664480940.6112] platform-linux: do-add-ip6-address[2: fe80::4972:49dc:5b46:4b9e]: failure 13 (Permission denied)
Sep 29 12:49:02 srv NetworkManager[663]: <warn>  [1664480942.6133] platform-linux: do-add-ip6-address[2: fe80::1588:e1f5:b91d:6585]: failure 13 (Permission denied)
Sep 29 12:49:04 srv NetworkManager[663]: <warn>  [1664480944.6157] platform-linux: do-add-ip6-address[2: fe80::cc8e:c60b:a398:cfd7]: failure 13 (Permission denied)
Sep 29 12:49:06 srv NetworkManager[663]: <warn>  [1664480946.6173] platform-linux: do-add-ip6-address[2: fe80::7123:5dfa:db2d:8fe3]: failure 13 (Permission denied)
Sep 29 12:49:08 srv NetworkManager[663]: <warn>  [1664480948.6189] platform-linux: do-add-ip6-address[2: fe80::525:da2:463b:6812]: failure 13 (Permission denied)
Sep 29 12:49:10 srv NetworkManager[663]: <warn>  [1664480950.6211] ipv6ll[ea9e44a59a9d45e5,ifindex=2]: changed: no IPv6 link local address to retry after Duplicate Address Detection failures (back off)

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Title:
  syslog flooded with "Error do-add-ip6-address" "faiilure 95" despite
  sysctl disabled ipv6

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