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Message-ID: <20180628003515.GD985@oracle.com> Date: Wed, 27 Jun 2018 20:35:15 -0400 From: Sowmini Varadhan <sowmini.varadhan@...cle.com> To: dsahern@...il.com Cc: netdev@...r.kernel.org Subject: [BISECTED] [4.17.0-rc6] IPv6 link-local address not getting added Hi David, An IPv6 regression has been introduced in 4.17.0-rc6 by 8308f3f net/ipv6: Add support for specifying metric of connected routes The regression is that some interfaces on my test machine come up with link-local addrs but the fe80 prefix is missing. After this bug, I cannot send any packets to anyone onlink (including my routers). Here are the symptoms: When everything is fine, "ip -6 route|grep eno" shows 2606:b400:400:18c8::/64 dev eno1 proto ra metric 100 pref medium fe80::5:73ff:fea0:52d dev eno1 proto static metric 100 pref medium fe80::/64 dev eno1 proto kernel metric 256 pref medium fe80::/64 dev eno3 proto kernel metric 256 pref medium fe80::/64 dev eno4 proto kernel metric 256 pref medium default via fe80::5:73ff:fea0:52d dev eno1 proto static metric 100 pref medium But after 8308f3f, I only find # ip -6 route|grep eno 2606:b400:400:18c8::/64 dev eno1 proto ra metric 100 pref medium fe80::5:73ff:fea0:52d dev eno1 proto static metric 100 pref medium fe80::/64 dev eno1 proto kernel metric 256 pref medium default via fe80::5:73ff:fea0:52d dev eno1 proto static metric 100 pref medium (note that eno2 is not enabled in my config, so its absence is expected) Please have a look, thanks. --Sowmini
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