Messages in this thread | ![/](/images/icornerl.gif) | | Subject | Re: [Intel-wired-lan] bug with rx-udp-gro-forwarding offloading? | From | Paolo Abeni <> | Date | Tue, 04 Jul 2023 15:41:19 +0200 |
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On Tue, 2023-07-04 at 15:23 +0200, Ian Kumlien wrote: > On Tue, Jul 4, 2023 at 2:54 PM Paolo Abeni <pabeni@redhat.com> wrote: > > > > On Tue, 2023-07-04 at 13:36 +0200, Ian Kumlien wrote: > > > Propper bug this time: > > > cat bug.txt | ./scripts/decode_stacktrace.sh vmlinux > > > > To be sure, is this with the last patch I shared? this one I mean: > > The current modifications I have, on top of v6.4.1, is: > diff --git a/net/core/skbuff.c b/net/core/skbuff.c > index cea28d30abb5..8552caa197f9 100644 > --- a/net/core/skbuff.c > +++ b/net/core/skbuff.c > @@ -4272,6 +4272,11 @@ struct sk_buff *skb_segment_list(struct sk_buff *skb, > > skb_shinfo(skb)->frag_list = NULL; > > + /* later code will clear the gso area in the shared info */ > + err = skb_header_unclone(skb, GFP_ATOMIC); > + if (err) > + goto err_linearize; > + > while (list_skb) { > nskb = list_skb; > list_skb = list_skb->next; > @@ -4328,6 +4333,9 @@ struct sk_buff *skb_segment_list(struct sk_buff *skb, > > skb->prev = tail; > > + if (WARN_ON_ONCE(!skb->next)) > + goto err_linearize; > + > if (skb_needs_linearize(skb, features) && > __skb_linearize(skb)) > goto err_linearize; > --- > > > https://lore.kernel.org/netdev/92a4d42491a2c219192ae86fa04b579ea3676d8c.camel@redhat.com/ > > > > Could you please additionally enable CONFIG_DEBUG_NET in your build? > > Sure, will do > > > Could you please give a detailed description of your network topology > > and the running traffic? > > This machine has two "real interfaces" and two interfaces that runs as > bridges for virtual machines > eno1 - real internal > eno2 - bridge - internal > eno3 - real external > eno4 - bridge - external > > The bridges are used by three virtual machines, two of which are > attached on both networks > > Traffic seemed to be video streaming, at least at first, now I don't > really know. I do have a few smart devices so I assume there is > a bit of multicast traffic as well - but not really anything unusual as such.
In there any XDP program running on the host side? Possibly changing the packet hdr?
Thanks!
/P
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