Re: Interruption in eBPF program after kernel update

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On Thu, Feb 14, 2019 at 10:33 AM Eric Leblond <eric@xxxxxxxxx> wrote:
>
> Hello,
>
> On Wed, 2019-02-13 at 20:46 +0100, Eric Leblond wrote:
> > Hello,
> >
> > I've got a simple socket filter program that seems to interrupt when
> > calling the load_word construct. I'm seeing the first message but
> > never
> > the second one.
> >
> > The code is the following
> >
> > int SEC("filter") hashfilter(struct __sk_buff *skb) {
> >     __u32 nhoff = BPF_LL_OFF + ETH_HLEN;
>
> So it seems the problem was coming from this line. Removing BPF_LL_OFF
> fixes the problem for kernel starting 4.18.
>
> Is this a known issue ?
>
> Is there something that would allow a BPF file to work independently of
> the kernel version ?

Daniel,
can this be related to removal of ld_abs legacy ?



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