Re: [PATCH] bpf: Add CONFIG_BPF_HELPER_STRICT

[Alexei Starovoitov]

On Fri, Jan 13, 2023 at 11:53 PM Roland <kernel.pwn@xxxxxxxxxxx> wrote:
>
> In container environment, ebpf helpers could be used maliciously to
>    leak information, DOS, even escape from containers.
>    CONFIG_BPF_HELPER_STRICT is as a mitigation of it.
>    Related Link: https://rolandorange.zone/report.html

The link is arguing that a process with CAP_SYS_ADMIN permissions
can read memory of user processes, leak kernel addresses, etc.
And this is somehow an issue with bpf helpers?
and your suggested "temporary mitigation" is to CONFIG_BPF=n ?
While this patch is a "proper fix" ?
Sorry, but please stay with your "temporary mitigation" forever.