Bug#1024070: linux-image-6.0.0-3-amd64: IPv6 ProxyNDP stops responding to ND solicitation some time after startup
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+JDjqRWbwU@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 :-)
Reply to: