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Re: v2 of seccomp filter c/r patches

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On Tue, Sep 15, 2015 at 9:07 AM, Tycho Andersen
<tycho.andersen@canonical.com> wrote:
> Hi Andy,
>
> On Mon, Sep 14, 2015 at 10:52:46AM -0700, Andy Lutomirski wrote:
>>
>> I'm not sure I entirely like this solution...
>
> Ok. Since we also aren't going to do all the eBPF stuff now, how about
> something that looks like this:
>
> struct seccomp_layer {
>   unsigned int size;
>   unsigned int type; /* SECCOMP_BPF_CLASSIC or SECCOMP_EBPF or ... */
>   bool inherited;
>   union {
>     unsigned int insn_cnt;
>     struct bpf_insn *insns;
>   };
> };
>
> with a ptrace command:
>
> ptrace(PTRACE_SECCOMP_DUMP_LAYER, pid, i, &layer);
>
> If we save a pointer to the current seccomp filter on fork (if there
> is one), then I think the inherited flag is just,
>
> inherited = is_ancestor(child->seccomp.filter, child->seccomp.inherited_filter)
>

I'm lost.  What is the inherited flag for?

--Andy
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Thread

v2 of seccomp filter c/r patches Tycho Andersen <tycho.andersen@canonical.com> - 2015-09-11 02:30 +0200
  [PATCH v2 4/5] seccomp: add a way to access filters via bpf fds Tycho Andersen <tycho.andersen@canonical.com> - 2015-09-11 02:30 +0200
    Re: [PATCH v2 4/5] seccomp: add a way to access filters via bpf fds Daniel Borkmann <daniel@iogearbox.net> - 2015-09-11 13:50 +0200
      Re: [PATCH v2 4/5] seccomp: add a way to access filters via bpf fds Tycho Andersen <tycho.andersen@canonical.com> - 2015-09-11 16:30 +0200
    Re: [PATCH v2 4/5] seccomp: add a way to access filters via bpf fds "Michael Kerrisk (man-pages)" <mtk.manpages@gmail.com> - 2015-09-11 14:10 +0200
      Re: [PATCH v2 4/5] seccomp: add a way to access filters via bpf fds Tycho Andersen <tycho.andersen@canonical.com> - 2015-09-11 16:40 +0200
    Re: [PATCH v2 4/5] seccomp: add a way to access filters via bpf fds Andy Lutomirski <luto@amacapital.net> - 2015-09-11 18:30 +0200
      Re: [PATCH v2 4/5] seccomp: add a way to access filters via bpf fds Tycho Andersen <tycho.andersen@canonical.com> - 2015-09-11 18:50 +0200
        Re: [PATCH v2 4/5] seccomp: add a way to access filters via bpf fds Andy Lutomirski <luto@amacapital.net> - 2015-09-14 20:00 +0200
  Re: v2 of seccomp filter c/r patches Alexei Starovoitov <alexei.starovoitov@gmail.com> - 2015-09-11 05:00 +0200
  Re: v2 of seccomp filter c/r patches Andy Lutomirski <luto@amacapital.net> - 2015-09-11 18:40 +0200
    Re: v2 of seccomp filter c/r patches Andy Lutomirski <luto@amacapital.net> - 2015-09-11 19:10 +0200
      Re: v2 of seccomp filter c/r patches Tycho Andersen <tycho.andersen@canonical.com> - 2015-09-11 19:30 +0200
        Re: v2 of seccomp filter c/r patches Andy Lutomirski <luto@amacapital.net> - 2015-09-14 20:00 +0200
          Re: v2 of seccomp filter c/r patches Tycho Andersen <tycho.andersen@canonical.com> - 2015-09-15 18:10 +0200
            Re: v2 of seccomp filter c/r patches Andy Lutomirski <luto@amacapital.net> - 2015-09-15 20:20 +0200
              Re: v2 of seccomp filter c/r patches Tycho Andersen <tycho.andersen@canonical.com> - 2015-09-15 20:30 +0200
                Re: v2 of seccomp filter c/r patches Andy Lutomirski <luto@amacapital.net> - 2015-09-15 22:10 +0200
                Re: v2 of seccomp filter c/r patches Tycho Andersen <tycho.andersen@canonical.com> - 2015-09-15 23:40 +0200

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