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From: "fweimer at redhat dot com" <sourceware-bugzilla@sourceware.org>
To: glibc-bugs@sourceware.org
Subject: [Bug dynamic-link/20802] getauxval NULL pointer dereference after
 static dlopen
Date: Sun, 23 May 2021 11:18:53 +0000
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https://sourceware.org/bugzilla/show_bug.cgi?id=3D20802

Florian Weimer <fweimer at redhat dot com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|ASSIGNED                    |RESOLVED
   Target Milestone|---                         |2.34
         Resolution|---                         |FIXED

--- Comment #2 from Florian Weimer <fweimer at redhat dot com> ---
Fixed for all architectures for glibc 2.34 via:

commit 78b31cc8341ab8268c468cd0f4f988d1d7862a55
Author: Florian Weimer <fweimer@redhat.com>
Date:   Mon May 17 09:59:14 2021 +0200

    elf: Partially initialize ld.so after static dlopen (bug 20802)

    After static dlopen, a copy of ld.so is loaded into the inner
    namespace, but that copy is not initialized at all.  Some
    architectures run into serious problems as result, which is why the
    _dl_var_init mechanism was invented.  With libpthread moving into
    libc and parts into ld.so, more architectures impacted, so it makes
    sense to switch to a generic mechanism which performs the partial
    initialization.

    As a result, getauxval now works after static dlopen (bug 20802).

    Reviewed-by: Adhemerval Zanella  <adhemerval.zanella@linaro.org>

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