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Date:      Tue, 19 Jan 2016 18:38:54 -0800
From:      Adrian Chadd <adrian.chadd@gmail.com>
To:        John Baldwin <jhb@freebsd.org>
Cc:        Marius Strobl <marius@freebsd.org>,  "src-committers@freebsd.org" <src-committers@freebsd.org>,  "svn-src-all@freebsd.org" <svn-src-all@freebsd.org>,  "svn-src-head@freebsd.org" <svn-src-head@freebsd.org>
Subject:   Re: svn commit: r294362 - in head/sys: dev/uart kern sys
Message-ID:  <CAJ-Vmo=ShcZX3NsVghOk0XHSpRgfiL8tXD-2d2zYeyN7W-E_bQ@mail.gmail.com>
In-Reply-To: <1839427.BLR7n8zvy2@ralph.baldwin.cx>
References:  <201601192334.u0JNYST5080954@repo.freebsd.org> <2881455.20ba4MY9ds@ralph.baldwin.cx> <1839427.BLR7n8zvy2@ralph.baldwin.cx>

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On 19 January 2016 at 18:36, John Baldwin <jhb@freebsd.org> wrote:

[snip]

>
> The code in ttydev_leave() is:
>
>         /* Drain any output. */
>         MPASS((tp->t_flags & TF_STOPPED) == 0);
>         if (!tty_gone(tp))
>                 tty_drain(tp, 1);
>
> Nothing in tty_drain() sets TF_GONE yet, so this seems to be a guaranteed
> panic.
>
> Various other places also call tty_drain() when then tty is not "gone"
> including the ioctl's backing tcsetattr().

ok, so should we back the patch out until it's addressed?


-a



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