[Openswan Users] klips_error:ipsec_xmit_encap_once: tried to skb_put 20, 16 available. This should never happen, please report.

[Danilo Godec]

 On 2.10.2010 18:24, Paul Wouters wrote:
> On Sat, 2 Oct 2010, Danilo Godec wrote:
>
>> I have a server running OpenSwan 2.6.29, using MAST stack. The server
>> has three Xen VM's and currently 4 active LAN's behind. There is not a
>> lot of traffic yet, as the building is not quite finished...
>>
>> If I connect to a VM and run a simple 'ls -lR /' it will sometimes get
>> 'stuck'. At that moment, a lot of these messages appear on the IPSEC
>> server:
>>
>>> Oct  2 14:04:34 lmqxen1 kernel: [59061.763064]
>>> klips_error:ipsec_xmit_encap_once: tried to skb_put 21, 17 available.
>>> This should never happen, please report.
>
> Are you running tight on memory?

Not really - the server has 4 GB and there are three VM's with 512MB each...

>
>> I also see these messages when 'cfagent' (a part of 'cfengine') on a VM
>> copies files from the server and gets stuck...
>
> Yeah, this does not seem to be an openswan bug. The code in question is:
> (one instance of it):
>
>         /* Set the data pointer */
>         skb_reserve(n,skb->data-skb->head+headroom);
>         /* Set the tail pointer and length */
>         if(skb_tailroom(n) < skb->len) {
>                 printk(KERN_WARNING "klips_error:skb_copy_expand: "
>                        "tried to skb_put %ld, %d available.  This
> should never happen, please report.\n",
>                        (unsigned long int)skb->len,
>                        skb_tailroom(n));
>                 ipsec_kfree_skb(n);
>                 return NULL;
>         }
>
> I would check with the xen people to see what might be going on.

Is it OK if I forward your message to the Xen list?


  Danilo