> On 6 Mar 2021, at 09:26, Kristof Provost <k...@freebsd.org> wrote: > > On 13 Feb 2021, at 21:58, Alexander V. Chernikov wrote: >> It turns out we're leaking some ifas for loopback interfaces on VNET >> teardown: >> > There’s a recent bug about this as well: 253998. > The problem’s been around for a long time though. The pf tests trigger it > from time to time, although it doesn’t appear to be 100% consistent, so my > current feeling is that it may be racy. > > I see ‘in6_purgeaddr: err=65, destination address delete failed’ when we do > leak, and I’ve also been able to confirm this is about the ::1 IPv6 loopback > address.
The fun part is that it turns out that these side effects are caused by 3 different issues. The unifying factor is that all of them are loopback-specific. AF_LINK ifa leak exists simply because there is no domain teardown procedure associated with AF_LINK, so we leak it for every non-vmoved interface during VNET shutdown. PR 253998 is caused by the fact that rt_flushifroutes_af() is not able to delete RTF_PINNED routes (e.g. all interface routes). D29116 addresses that. in6_purgeaddr error is caused by the corner case with loopback&p2p interfaces. D29121 addresses that. > > Best regards, > Kristof _______________________________________________ freebsd-current@freebsd.org mailing list https://lists.freebsd.org/mailman/listinfo/freebsd-current To unsubscribe, send any mail to "freebsd-current-unsubscr...@freebsd.org"
