Re: [PATCH bpf-next 2/2] selftests/bpf: Add test for css_task iter combining with cgroup iter

[Alexei Starovoitov <alexei.starovoitov@xxxxxxxxx>]

On Mon, Oct 23, 2023 at 6:50 AM Chuyi Zhou <zhouchuyi@xxxxxxxxxxxxx> wrote:
>
>
> R1_w=ptr_task_struct(off=0,imm=0) R7_w=ptr_task_struct(off=0,imm=0)
> 18: (85) call bpf_task_acquire#26990
> R1 must be a rcu pointer
>
> I will try to figure out it.

Thanks. That would be great.
So far it looks like a regression.
I'm guessing __bpf_md_ptr wrapping is confusing the verifier.

Since it's more complicated than I thought, please respin
the current set with fixes to patch 1 and leave the patch 2 as-is.
That can be another follow up.