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Date: Tue, 15 Sep 2015 11:13:51 -0700 From: Andy Lutomirski <luto@...capital.net> To: Tycho Andersen <tycho.andersen@...onical.com> Cc: Kees Cook <keescook@...omium.org>, Pavel Emelyanov <xemul@...allels.com>, Network Development <netdev@...r.kernel.org>, Alexei Starovoitov <ast@...nel.org>, "David S. Miller" <davem@...emloft.net>, Oleg Nesterov <oleg@...hat.com>, "Serge E. Hallyn" <serge.hallyn@...ntu.com>, Linux API <linux-api@...r.kernel.org>, Will Drewry <wad@...omium.org>, "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>, Daniel Borkmann <daniel@...earbox.net> Subject: Re: v2 of seccomp filter c/r patches On Tue, Sep 15, 2015 at 9:07 AM, Tycho Andersen <tycho.andersen@...onical.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 -- To unsubscribe from this list: send the line "unsubscribe netdev" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
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