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Date:   Wed, 6 Apr 2022 21:22:13 +0200
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Subject: vfork(2) behavior not consistent with fork(2) (was: vfork(2) fails
 after unshare(CLONE_NEWTIME) (was: [Bug 215769] man 2 vfork() does not
 document corner case when PID == 1))
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To:     Christian Brauner <brauner@kernel.org>,
        Florian Weimer <fweimer@redhat.com>,
        Michael Kerrisk <mtk.manpages@gmail.com>
Cc:     linux-kernel@vger.kernel.org,
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        <socketpair@gmail.com>, Andrei Vagin <avagin@openvz.org>,
        Dmitry Safonov <dima@arista.com>,
        Thomas Gleixner <tglx@linutronix.de>,
        Arnd Bergmann <arnd@arndb.de>, Serge Hallyn <serge@hallyn.com>,
        bugzilla-daemon@kernel.org, linux-api@vger.kernel.org
References: <bug-215769-216477@https.bugzilla.kernel.org/>
 <bug-215769-216477-to2O9X1Knw@https.bugzilla.kernel.org/>
 <4fb02f5f-60f9-42af-ddd5-fe5af877231f@gmail.com>
 <20220404080519.pi6izyuop3mmdg2g@wittgenstein>
 <ae2cbf67-aace-bc40-418e-7b41873f814a@gmail.com>
 <20220406084613.3srklyt27qxcmrcx@wittgenstein>
From:   Alejandro Colomar <alx.manpages@gmail.com>
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> $ sudo ./vfork_newpid
> vfork_newpid: PID: 8479
> vfork_newpid: PID 8479 exiting after execve(2): Success
> print_pid: PID 1 exiting. 


I definitely think this is a kernel (or glibc) bug.
execve(2) is supposed to _never_ return 0 (and errno 0).
I submitted a new bug to discuss it.

Please see <https://bugzilla.kernel.org/show_bug.cgi?id=215813>