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From: "fweimer at redhat dot com" <sourceware-bugzilla@sourceware.org>
To: glibc-bugs@sourceware.org
Subject: [Bug nptl/12889] Race condition in pthread_kill
Date: Mon, 13 Sep 2021 10:46:03 +0000
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https://sourceware.org/bugzilla/show_bug.cgi?id=3D12889

Florian Weimer <fweimer at redhat dot com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|ASSIGNED                    |RESOLVED
         Resolution|---                         |FIXED
   Target Milestone|---                         |2.35

--- Comment #8 from Florian Weimer <fweimer at redhat dot com> ---
Fixed for 2.35 via:

commit 526c3cf11ee9367344b6b15d669e4c3cb461a2be
Author: Florian Weimer <fweimer@redhat.com>
Date:   Mon Sep 13 11:06:08 2021 +0200

    nptl: Fix race between pthread_kill and thread exit (bug 12889)

    A new thread exit lock and flag are introduced.  They are used to
    detect that the thread is about to exit or has exited in
    __pthread_kill_internal, and the signal is not sent in this case.

    The test sysdeps/pthread/tst-pthread_cancel-select-loop.c is derived
    from a downstream test originally written by Marek Polacek.

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

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