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From: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
To: Radim Pavlik <radim.pavlik@tbs-biometrics.com>
Cc: Andy Shevchenko <andy.shevchenko@gmail.com>,
	Jiri Slaby <jirislaby@kernel.org>,
	linux-serial@vger.kernel.org, linux-kernel@vger.kernel.org
Subject: Re: [PATCH v2] sc16is7xx: Prevent dereferencing invalid data when gpio_hog used
Date: Mon, 20 Dec 2021 12:45:00 +0100	[thread overview]
Message-ID: <YcBsvFGF5DasixIy@kroah.com> (raw)
In-Reply-To: <20211220113603.1311-1-radim.pavlik@tbs-biometrics.com>

On Mon, Dec 20, 2021 at 12:36:03PM +0100, Radim Pavlik wrote:
> gpio_hog is trying to use gpio functions during probe call.
> At that time we dont have initialized port data which are dereferenced
> via assigned gpio.direction_input/output functions.
> This results in unable to handle kernel NULL pointer dereference
> followed by Kernel panic.
> This patch prevents that.
> 
> Due to changed order of initialization 'port' before 'gpio controller'
> was also changed error path which resulted in removed label.
> 
> No fixes tag because patch spans across multiple patches.

Then list the individual patches please.  Or at least give us a chance
to know how far back to backport this to stable kernels.

thanks,

greg k-h

  reply	other threads:[~2021-12-20 11:45 UTC|newest]

Thread overview: 3+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
     [not found] <CAHp75VeaWJBstu2j1-wkBkPfgc0dXvjWZR01d8-q0P8t_3gvNA@mail.gmail.com>
2021-12-20 11:36 ` [PATCH v2] sc16is7xx: Prevent dereferencing invalid data when gpio_hog used Radim Pavlik
2021-12-20 11:45   ` Greg Kroah-Hartman [this message]
2021-12-20 11:45   ` Greg Kroah-Hartman

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