linux-kernel - Re: [PATCHv2 2/4] tty: Hold tty_ldisc_lock() during tty

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Date:   Tue, 4 Sep 2018 16:06:16 +0900
From:   Sergey Senozhatsky <sergey.senozhatsky.work@...il.com>
To:     Jiri Slaby <jslaby@...e.com>
Cc:     Sergey Senozhatsky <sergey.senozhatsky.work@...il.com>,
        Dmitry Safonov <dima@...sta.com>, linux-kernel@...r.kernel.org,
        Dmitry Safonov <0x7f454c46@...il.com>,
        Daniel Axtens <dja@...ens.net>,
        Dmitry Vyukov <dvyukov@...gle.com>,
        Michael Neuling <mikey@...ling.org>,
        Mikulas Patocka <mpatocka@...hat.com>,
        Nathan March <nathan@...net>,
        Pasi Kärkkäinen <pasik@....fi>,
        Peter Hurley <peter@...leysoftware.com>,
        Tan Xiaojun <tanxiaojun@...wei.com>,
        Tetsuo Handa <penguin-kernel@...ove.SAKURA.ne.jp>,
        syzbot+3aa9784721dfb90e984d@...kaller.appspotmail.com,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        stable@...r.kernel.org
Subject: Re: [PATCHv2 2/4] tty: Hold tty_ldisc_lock() during tty_reopen()

On (09/04/18 08:30), Jiri Slaby wrote:
>
> >> Cc: stable@...r.kernel.org # depends on commit b027e2298bd5 ("tty: fix
> >> data race between tty_init_dev and flush of buf")
> > 
> > I believe there's a "Fixes" tag for that
> > 
> > Fixes: b027e2298bd5 ("tty: fix data race between tty_init_dev and flush of buf")
> > Cc: stable@...r.kernel.org
> 
> Nope, it would be translated as:
> Backport-first: b027e2298bd5
> :)

:) Ah, OK.
So this "Backport-first:" is for pre-4.9 longterm kernels.
As far as I can see linux-4.9.y picked up b027e2298bd5:

commit 55eaecffe3d663d02084023b9fc06d5f39b97389
Author: Gaurav Kohli
Date:   Tue Jan 23 13:16:34 2018 +0530

    tty: fix data race between tty_init_dev and flush of buf

    commit b027e2298bd588d6fa36ed2eda97447fb3eac078 upstream.

	-ss