netdev - Re: sctp netns "unregister_netdevice: waiting for lo to become free. Usage count = 1"

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Date:   Fri, 2 Feb 2018 10:27:41 +0200
From:   Tommi Rantala <tt.rantala@...il.com>
To:     Alexey Kodanev <alexey.kodanev@...cle.com>
Cc:     Tommi Rantala <tommi.t.rantala@...ia.com>,
        Neil Horman <nhorman@...driver.com>,
        Vlad Yasevich <vyasevich@...il.com>,
        linux-sctp@...r.kernel.org,
        "netdev@...r.kernel.org" <netdev@...r.kernel.org>,
        Marcelo Ricardo Leitner <marcelo.leitner@...il.com>
Subject: Re: sctp netns "unregister_netdevice: waiting for lo to become free.
 Usage count = 1"

2018-02-02 1:57 GMT+02:00 Alexey Kodanev <alexey.kodanev@...cle.com>:
> For ipv6 part, shouldn't we release 'bdst' there if the previous address
> match is better and we continue to the next iteration?

Good catch!

Didn't see that one.

Tommi

> diff --git a/net/sctp/ipv6.c b/net/sctp/ipv6.c
> index 5d4c15b..a044096 100644
> --- a/net/sctp/ipv6.c
> +++ b/net/sctp/ipv6.c
> @@ -336,8 +336,11 @@ static void sctp_v6_get_dst(struct sctp_transport *t, union sctp_addr *saddr,
>                 }
>
>                 bmatchlen = sctp_v6_addr_match_len(daddr, &laddr->a);
> -               if (matchlen > bmatchlen)
> +               if (matchlen > bmatchlen) {
> +                       if (!IS_ERR(bdst))
> +                               dst_release(bdst);
>                         continue;
> +               }
>
>                 if (!IS_ERR_OR_NULL(dst))
>                         dst_release(dst);
>
> Thanks,
> Alexey