On Mon, Dec 02, 2019 at 06:00:14PM -0500, Paul Moore wrote:

SNIP

quoted

+
+static void bpf_audit_prog(const struct bpf_prog *prog, enum bpf_audit op)
+{
+       struct audit_buffer *ab;
+
+       if (audit_enabled == AUDIT_OFF)
+               return;

I think you would probably also want to check the results of
audit_dummy_context() here as well, see all the various audit_XXX()
functions in include/linux/audit.h as an example.  You'll see a
pattern similar to the following:

static inline void audit_foo(...)
{
  if (unlikely(!audit_dummy_context()))
    __audit_foo(...)
}

quoted

+       ab = audit_log_start(audit_context(), GFP_ATOMIC, AUDIT_BPF);
+       if (unlikely(!ab))
+               return;
+       audit_log_format(ab, "prog-id=%u op=%s",
+                        prog->aux->id, bpf_audit_str[op]);

Is it worth putting some checks in here to make sure that you don't
blow past the end of the bpf_audit_str array?

forgot answer this one..  there are only 2 callers:

  bpf_audit_prog(prog, BPF_AUDIT_UNLOAD);
  bpf_audit_prog(prog, BPF_AUDIT_LOAD);

that's not going to change any time soon,
so I dont think we don't need such check

jirka