From: Okash Khawaja <okash.khawaja@gmail.com>
To: Dan Carpenter <dan.carpenter@oracle.com>
Cc: Alan Cox <gnomes@lxorguk.ukuu.org.uk>,
"devel@driverdev.osuosl.org" <devel@driverdev.osuosl.org>,
Kirk Reiser <kirk@reisers.ca>,
Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
"speakup@linux-speakup.org" <speakup@linux-speakup.org>,
"linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>,
Jiri Slaby <jslaby@suse.com>,
Samuel Thibault <samuel.thibault@ens-lyon.org>,
Chris Brannon <chris@the-brannons.com>
Subject: Re: [patch 0/3] Re: tty contention resulting from tty_open_by_device export
Date: Tue, 18 Jul 2017 20:22:59 +0100 [thread overview]
Message-ID: <20170718192259.GA2799@sanghar> (raw)
In-Reply-To: <20170718122637.l5v3re2gcjbxkzeq@mwanda>
On Tue, Jul 18, 2017 at 03:26:37PM +0300, Dan Carpenter wrote:
> > + if (tty) {
> > + /* drop kref from tty_driver_lookup_tty() */
> > + tty_kref_put(tty);
> > + tty = ERR_PTR(-EBUSY);
> > + } else { /* tty_init_dev returns tty with the tty_lock held */
> > + tty = tty_init_dev(driver, index);
> > + tty_port_set_kopened(tty->port, 1);
> ^^^^^^^^^
>
> tty_init_dev() can fail leading to an error pointer dereference here.
Thanks very much. I will check for error pointer here.
Okash
next prev parent reply other threads:[~2017-07-18 19:23 UTC|newest]
Thread overview: 37+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-07-07 20:28 tty contention resulting from tty_open_by_device export Okash Khawaja
2017-07-08 8:38 ` Greg Kroah-Hartman
2017-07-08 9:01 ` Okash Khawaja
2017-07-09 11:41 ` [patch 0/3] " Okash Khawaja
2017-07-09 11:41 ` [patch 1/3] tty: resolve tty contention between kernel and user space Okash Khawaja
2017-07-09 11:51 ` Greg Kroah-Hartman
2017-07-09 15:04 ` Andy Shevchenko
2017-07-09 19:08 ` Okash Khawaja
2017-07-10 8:31 ` Okash Khawaja
2017-07-10 15:21 ` Andy Shevchenko
2017-07-10 16:12 ` Okash Khawaja
2017-07-09 11:41 ` [patch 2/3] staging: speakup: use tty_kopen instead of tty_open_by_driver Okash Khawaja
2017-07-09 11:50 ` Greg Kroah-Hartman
2017-07-09 12:28 ` Okash Khawaja
2017-07-09 11:41 ` [patch 3/3] tty: undo export " Okash Khawaja
2017-07-09 11:57 ` [patch 0/3] Re: tty contention resulting from tty_open_by_device export Greg Kroah-Hartman
2017-07-09 12:32 ` [patch 4/3] tty: make tty_kopen return ENODEV in case of no TTY Okash Khawaja
2017-07-10 11:52 ` [patch 0/3] Re: tty contention resulting from tty_open_by_device export Alan Cox
2017-07-10 12:33 ` Okash Khawaja
2017-07-10 16:22 ` Okash Khawaja
2017-07-12 18:20 ` Alan Cox
2017-07-13 11:29 ` Okash Khawaja
2017-07-17 12:31 ` Greg Kroah-Hartman
2017-07-17 13:23 ` Okash Khawaja
2017-07-17 22:04 ` Alan Cox
2017-07-18 11:29 ` Okash Khawaja
2017-07-18 12:26 ` Dan Carpenter
2017-07-18 19:22 ` Okash Khawaja [this message]
2017-07-18 13:49 ` Alan Cox
2017-07-20 7:22 ` [patch v3 0/3] tty contention resulting from tty_open_by_driver export Okash Khawaja
2017-07-20 7:22 ` [patch v3 1/3] tty: resolve tty contention between kernel and user space Okash Khawaja
2017-07-20 7:22 ` [patch v3 2/3] staging: speakup: use tty_kopen and tty_kclose Okash Khawaja
2017-07-20 7:22 ` [patch v3 3/3] tty: undo export of tty_open_by_driver Okash Khawaja
2017-07-17 21:04 ` [patch v2 0/3] tty contention resulting from tty_open_by_driver export Okash Khawaja
2017-07-17 21:04 ` [patch v2 1/3] tty: resolve tty contention between kernel and user space Okash Khawaja
2017-07-17 21:04 ` [patch v2 2/3] staging: speakup: use tty_kopen instead of tty_open_by_driver Okash Khawaja
2017-07-17 21:04 ` [patch v2 3/3] tty: undo export " Okash Khawaja
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