Messages in this thread | | | Date | Fri, 4 Sep 2015 13:29:49 -0700 | From | Alexei Starovoitov <> | Subject | Re: [PATCH 4/6] seccomp: add a way to access filters via bpf fds |
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On Fri, Sep 04, 2015 at 01:26:42PM -0700, Kees Cook wrote: > On Fri, Sep 4, 2015 at 9:04 AM, Tycho Andersen > <tycho.andersen@canonical.com> wrote: > > This patch adds a way for a process that is "real root" to access the > > seccomp filters of another process. The process first does a > > PTRACE_SECCOMP_GET_FILTER_FD to get an fd with that process' seccomp filter > > attached, and then iterates on this with PTRACE_SECCOMP_NEXT_FILTER using > > bpf(BPF_PROG_DUMP) to dump the actual program at each step. > > Why is this a new ptrace interface instead of a new seccomp interface? > I would expect this to only be valid for "current", otherwise we could > run into races as the ptracee adds filters. i.e. it is not safe to > examine seccomp filters from tasks other than current.
same question. I thought we discussed to add a command to seccomp() syscall for that?
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