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Subject: [Bug stdio/27842] Race condition in _IO_FLAGS2_NEED_LOCK optimization
Date: Fri, 10 Jun 2022 12:38:23 +0000
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https://sourceware.org/bugzilla/show_bug.cgi?id=3D27842

--- Comment #1 from cvs-commit at gcc dot gnu.org <cvs-commit at gcc dot gn=
u.org> ---
The master branch has been updated by Wilco Dijkstra <wilco@sourceware.org>:

https://sourceware.org/git/gitweb.cgi?p=3Dglibc.git;h=3Df107b7b30d815f19118=
1617e2c14f21e6af4ddcf

commit f107b7b30d815f191181617e2c14f21e6af4ddcf
Author: Wilco Dijkstra <wilco.dijkstra@arm.com>
Date:   Fri Jun 10 13:33:26 2022 +0100

    libio: Avoid RMW of flags2 outside lock (BZ #27842)

    Remove an unconditional RMW on flags2 in flockfile - we don't need to
change
    _IO_FLAGS2_NEED_LOCK since it isn't used in flockfile or funlockfile.
    This fixes BZ #27842.

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

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