netdev - Re: [regresion] Dell's OMSA Systems Management Data Engine stuck after update from 6.8.y to 6.9.y (with bisecting)

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Message-ID: <CAK8fFZ6nEFcfr8VpBJTo_cRwk6UX0Kr97xuq6NhxyvfYFZ1Awg@mail.gmail.com>
Date: Fri, 31 May 2024 08:48:31 +0200
From: Jaroslav Pulchart <jaroslav.pulchart@...ddata.com>
To: Jakub Kicinski <kuba@...nel.org>
Cc: netdev@...r.kernel.org, Igor Raits <igor@...ddata.com>, 
	Daniel Secik <daniel.secik@...ddata.com>, Zdenek Pesek <zdenek.pesek@...ddata.com>
Subject: Re: [regresion] Dell's OMSA Systems Management Data Engine stuck
 after update from 6.8.y to 6.9.y (with bisecting)

>
> On Thu, 30 May 2024 09:52:38 +0200 Jaroslav Pulchart wrote:
> > However, reverting just the "use xarray iterator to implement
> > rtnl_dump_ifinfo" change did not resolve the issue. Do you have any
> > suggestions on what to try next and how to fix it?
>
> The daemon must have rolled its own netlink parsing.
>
> Could you try this?
>
> diff --git a/net/ipv4/devinet.c b/net/ipv4/devinet.c
> index 96accde527da..5fd06473ddd9 100644
> --- a/net/ipv4/devinet.c
> +++ b/net/ipv4/devinet.c
> @@ -1912,6 +1912,8 @@ static int inet_dump_ifaddr(struct sk_buff *skb, struct netlink_callback *cb)
>                         goto done;
>         }
>  done:
> +       if (err == -EMSGSIZE && likely(skb->len))
> +               err = skb->len;
>         if (fillargs.netnsid >= 0)
>                 put_net(tgt_net);
>         rcu_read_unlock();

I tried it and it did not help, the issue is still there.