Bug 1333945

glibc-2.22-15.fc23 has been submitted as an update to Fedora 23. https://bodhi.fedoraproject.org/updates/FEDORA-2016-68abc0be35

glibc-2.22-15.fc23 has been pushed to the Fedora 23 testing repository. If problems still persist, please make note of it in this bug report.
See https://fedoraproject.org/wiki/QA:Updates_Testing for
instructions on how to install test updates.
You can provide feedback for this update here: https://bodhi.fedoraproject.org/updates/FEDORA-2016-68abc0be35

Fixed for 2.23 with these new backports:

commit a824d609581d5ee7544aabcbbc70e8da44b2b5b6
Author: Adhemerval Zanella <adhemerval.zanella>
Date:   Thu Mar 31 10:51:51 2016 -0300

    Fix tst-dlsym-error build
    
    This patch fixes the new test tst-dlsym-error build on aarch64
    (and possible other architectures as well) due missing strchrnul
    definition.
    
        * elf/tst-dlsym-error.c: Include <string.h> for strchrnul.
    
    (cherry picked from commit e91bd7465816f474617dcb4bbfe72f3594c5783c)

commit 80f87443eed17838fe453f1f5406ccf5d3698c25
Author: Florian Weimer <fweimer>
Date:   Thu Mar 31 11:26:55 2016 +0200

    Report dlsym, dlvsym lookup errors using dlerror [BZ #19509]
    
        * elf/dl-lookup.c (_dl_lookup_symbol_x): Report error even if
        skip_map != NULL.
        * elf/tst-dlsym-error.c: New file.
        * elf/Makefile (tests): Add tst-dlsym-error.
        (tst-dlsym-error): Link against libdl.
    
    (cherry picked from commit 7d45c163d00c88d5875a112343c4ea3e61349e6b)

glibc-2.23.1-6.fc24 has been submitted as an update to Fedora 24. https://bodhi.fedoraproject.org/updates/FEDORA-2016-b321728d74

This bug fix breaks Address Sanitizer:

  https://llvm.org/bugs/show_bug.cgi?id=27310

I think it's not really defined what ASAN is doing (you need to have a working malloc when you call dlsym), but the question is if this kind of breakage is worth fixing this bug.

Typical error message:

==10293==AddressSanitizer CHECK failed: ../../../../libsanitizer/asan/asan_rtl.cc:556 "((!asan_init_is_running && "ASan init calls itself!")) != (0)" (0x0, 0x0)
    <empty stack>

glibc-2.22-15.fc23 has been pushed to the Fedora 23 stable repository. If problems still persist, please make note of it in this bug report.

glibc-2.23.1-6.fc24 has been pushed to the Fedora 24 testing repository. If problems still persist, please make note of it in this bug report.
See https://fedoraproject.org/wiki/QA:Updates_Testing for
instructions on how to install test updates.
You can provide feedback for this update here: https://bodhi.fedoraproject.org/updates/FEDORA-2016-b321728d74

Patch had to be reverted due to bug 1335011.

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The revert has been reverted upstream, and this is fixed glibc 2.24 and later.