Re: Hitting verifier backtracking bug on 6.5.5 kernel

["Toke Høiland-Jørgensen" <toke@redhat.com>]

Shung-Hsi Yu <shung-hsi.yu@suse.com> writes:

> On Fri, Oct 20, 2023 at 06:30:48PM +0200, Toke Høiland-Jørgensen wrote:
>> Toke Høiland-Jørgensen <toke@redhat.com> writes:
>> > Shung-Hsi Yu <shung-hsi.yu@suse.com> writes:
>> >
>> >> Patch based on Andrii's analysis.
>> >>
>> >> Given that both BPF_END and BPF_NEG always operates on dst_reg itself
>> >> and that bt_is_reg_set(bt, dreg) was already checked I believe we can
>> >> just return with no futher action.
>> >
>> > Alright, manually applied this to bpf-next and indeed this enables the
>> > netobserv-bpf-agent to load successfully. Care to submit a formal patch?
>> > In that case please add my:
>> >
>> > Tested-by: Toke Høiland-Jørgensen <toke@redhat.com>
>> >
>> > Thanks!
>> 
>> Friendly ping - are you planning to submit an official patch for this? :)
>
> Yes, I do plan to send an offical one along with selftest as Alexei has
> suggested. Once I've got my irrational fear of writing selftests overcame ;)
>
> Should have it out before the end of this week.

Alright great! Didn't mean to rush you, just wanted to double check that
you were planning to submit this :)

Thanks!

-Toke