mpls-linux-general

[mpls-linux-general] Problem with mpls_add_reserved_labels

[Christophe F. <cf...@ut...>]

Hi all,

I have just built a 2.6.7-uml kernel with the latest MPLS patch
found on Sourceforge applied.

I have enabled the following options:

   CONFIG_MPLS
   CONFIG_MPLS_TUNNEL
   CONFIG_IP_MPLS
   CONFIG_IPV6

I didn't check "IPv6: MPLS Support" (CONFIG_INET6_MPLS)

When the kernel starts, it crashes in the mpls_add_reserved_labels
function (mpls_ilm.c), on this line:

   ipv6_explicit_null.u.dst.input = ipv6_explicit_null.ilm_proto->local_deliver;

The "ilm_proto" field is set before by:

   ipv6_explicit_null.ilm_proto = mpls_get_prot(AF_INET6);

but if CONFIG_INET6_MPLS is not set, mpls_get_prot returns NULL.

Maybe it could be necessary to check that the "ilm_protot" field is
correctly set before doing anything else ?
The same problem occurs if CONFIG_IP_MPLS is disabled.

Regards,

-- 
Christophe Fillot (cf...@ut...)  | Universite de Technologie de Compiegne
Tel: (+33) 03.44.23.79.02      | Service Informatique - Equipe Reseaux
GSM: (+33) 06.70.50.24.55      | Centre de Recherche de Royallieu
Fax: (+33) 03.44.23.46.77      | http://www.utc.fr

Re: [mpls-linux-general] Problem with mpls_add_reserved_labels

[James R. L. <jl...@mi...>]

Thank you for the bug report.

On Thu, Aug 26, 2004 at 06:14:44PM +0200, Christophe Fillot wrote:
> 
> Hi all,
> 
> I have just built a 2.6.7-uml kernel with the latest MPLS patch
> found on Sourceforge applied.
> 
> I have enabled the following options:
> 
>    CONFIG_MPLS
>    CONFIG_MPLS_TUNNEL
>    CONFIG_IP_MPLS
>    CONFIG_IPV6
> 
> I didn't check "IPv6: MPLS Support" (CONFIG_INET6_MPLS)
> 
> When the kernel starts, it crashes in the mpls_add_reserved_labels
> function (mpls_ilm.c), on this line:
> 
>    ipv6_explicit_null.u.dst.input = ipv6_explicit_null.ilm_proto->local_deliver;
> 
> The "ilm_proto" field is set before by:
> 
>    ipv6_explicit_null.ilm_proto = mpls_get_prot(AF_INET6);
> 
> but if CONFIG_INET6_MPLS is not set, mpls_get_prot returns NULL.
> 
> Maybe it could be necessary to check that the "ilm_protot" field is
> correctly set before doing anything else ?
> The same problem occurs if CONFIG_IP_MPLS is disabled.
> 
> Regards,
> 
> -- 
> Christophe Fillot (cf...@ut...)  | Universite de Technologie de Compiegne
> Tel: (+33) 03.44.23.79.02      | Service Informatique - Equipe Reseaux
> GSM: (+33) 06.70.50.24.55      | Centre de Recherche de Royallieu
> Fax: (+33) 03.44.23.46.77      | http://www.utc.fr
> 
> 
> 
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-- 
James R. Leu
jl...@mi...