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From: "stsp at users dot sourceforge.net"
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To: glibc-bugs@sourceware.org
Subject: [Bug dynamic-link/30134] DT_AUDIT is ignored for dlopen()ed solib
Date: Mon, 27 Feb 2023 06:03:33 +0000
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https://sourceware.org/bugzilla/show_bug.cgi?id=3D30134

--- Comment #15 from Stas Sergeev <stsp at users dot sourceforge.net> ---
(In reply to Jonathon Anderson from comment #14)
> In other words, the main executable gets mapped (long) before the auditors
> get loaded.

Yes, but:
- We can see that la_objopen is explicitly
  called for main executable and ld.so, as if
  they were loaded later.
- As I pointed, solibs are processed later yet.

So no matter what, the auditor gets the calls
for every object, including the one that links
it in, and all its deps.

> I suppose solibs could be different, but AFAICT you would have to refactor
> _dl_map_object_from_fd to *also* read the dynamic section and recursively
> load any auditors *before* its call to _dl_map_segments.

Or just do similar to dl_main() and call the
new auditors at the end? Of course objsearch
will be skipped, but its the same for dl_main()
and no one complained. It would be really weird
if the auditor wants to alter the object path
of the object to which it linked to.

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