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[Bug dynamic-link/20839] Incomplete rollback of dynamic linker state on linking failure


https://sourceware.org/bugzilla/show_bug.cgi?id=20839

--- Comment #11 from cvs-commit at gcc dot gnu.org <cvs-commit at gcc dot gnu.org> ---
The master branch has been updated by Florian Weimer <fw@sourceware.org>:

https://sourceware.org/git/gitweb.cgi?p=glibc.git;h=f63b73814f74032c0e5d0a83300e3d864ef905e5

commit f63b73814f74032c0e5d0a83300e3d864ef905e5
Author: Florian Weimer <fweimer@redhat.com>
Date:   Wed Nov 13 15:44:56 2019 +0100

    Remove all loaded objects if dlopen fails, ignoring NODELETE [BZ #20839]

    This introduces a “pending NODELETE” state in the link map, which is
    flipped to the persistent NODELETE state late in dlopen, via
    activate_nodelete.    During initial relocation, symbol binding
    records pending NODELETE state only.  dlclose ignores pending NODELETE
    state.  Taken together, this results that a partially completed dlopen
    is rolled back completely because new NODELETE mappings are unloaded.

    Tested on x86_64-linux-gnu and i386-linux-gnu.

    Change-Id: Ib2a3d86af6f92d75baca65431d74783ee0dbc292

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