Hi Kevin, On Sun, Nov 20, 2022 at 08:23:04AM -0500, Kevin P. Fleming wrote: > On Sun, Nov 20, 2022, at 08:15, Salvatore Bonaccorso wrote: > > Hi, > > > > On Sun, Nov 20, 2022 at 02:13:11PM +0100, Salvatore Bonaccorso wrote: > >> Control: tags -1 + moreinfo > >> > >> Hi, > >> > >> On Mon, Nov 14, 2022 at 06:34:43AM -0500, Kevin P. Fleming wrote: > >> > Package: src:linux > >> > Version: 6.0.7-1 > >> > Severity: normal > >> > Tags: ipv6 > >> > > >> > Dear Maintainer, > >> > > >> > This system has been operating for most of the last 12 months, using > >> > ProxyNDP on its external interface for eight addresses. After > >> > upgrading to the 6.0 kernel series, the kernel stops responding to ND > >> > solicitations for those addresses after startup... it does not happen > >> > immediately, but reliably occurs. When the system is in this state > >> > (not responding to ND solicitations for the proxy addresses), the > >> > proxy addresses are still shown in 'ip neigh show proxy', and the > >> > single non-proxy address on the same interface continues operating > >> > normally. > >> > > >> > Booting the system with the 5.19.0-2 kernel package cures the problem, > >> > with no other changes. > >> > > >> > Example output: > >> > > >> > root@net22:~# ip neigh show proxy > >> > 2607:5300:203:9743::1 dev ve-diw20 proxy > >> > 2607:5300:203:9743::1 dev ve-matrix20 proxy > >> > 2607:5300:203:9743::1 dev ve-ns3 proxy > >> > 2607:5300:203:9743::1 dev ve-ldl20 proxy > >> > 2607:5300:203:9743::1 dev ve-quassel21 proxy > >> > 2607:5300:203:9743::1 dev ve-mastodon22 proxy > >> > 2607:5300:203:9743::1 dev ve-monica21 proxy > >> > 2607:5300:203:9743::1 dev ve-mail20 proxy > >> > 2607:5300:203:9743:4::1 dev enp1s0f0 proxy > >> > 2607:5300:203:9743:1::1 dev enp1s0f0 proxy > >> > 2607:5300:203:9743:8::1 dev enp1s0f0 proxy > >> > 2607:5300:203:9743:5::1 dev enp1s0f0 proxy > >> > 2607:5300:203:9743:3::1 dev enp1s0f0 proxy > >> > 2607:5300:203:9743:2::1 dev enp1s0f0 proxy > >> > 2607:5300:203:9743:6::1 dev enp1s0f0 proxy > >> > 2607:5300:203:9743:7::1 dev enp1s0f0 proxy > >> > > >> > The addresses on enp1s0f0 are the ones which stop responding. > >> > >> Does the following matches your problem? > >> > >> https://lore.kernel.org/netdev/y295+9+jdjqrw...@x1.ze-it.at/ > >> > >> Would you be able to test the mentioned patch to verify a fix for your > >> issue? The above changes fixes 0ff4eb3d5ebb ("neighbour: make > >> proxy_queue.qlen limit per-device") introduced in 6.0-rc2. > > > > For reference, the commit would be v2 as applied in netdev as > > https://git.kernel.org/pub/scm/linux/kernel/git/netdev/net.git/commit/?id=8207f253a097fe15c93d85ac15ebb73c5e39e1e1 > > While that description does not exactly match my problem, it is so > similar as to almost certainly be the cause. I would be happy to try > applying that patch, but it's been a while since I built a patched > Debian kernel so it may take a couple of days :-)
If that would be helpful, we have some instructions on "simple patching and building" the kernel with a additional patches on top here: https://kernel-team.pages.debian.net/kernel-handbook/ch-common-tasks.html#s4.2.2 Hope this helps for it. Regards, Salvatore