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 :-)
