linux-kernel - Re: [PATCH] spi: spidev: fix possible NULL dereference

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Message-ID: <20150911122513.GT12027@sirena.org.uk>
Date:	Fri, 11 Sep 2015 13:25:13 +0100
From:	Mark Brown <broonie@...nel.org>
To:	Jarkko Nikula <jarkko.nikula@...ux.intel.com>
Cc:	Sudip Mukherjee <sudipm.mukherjee@...il.com>,
	linux-kernel@...r.kernel.org, linux-spi@...r.kernel.org
Subject: Re: [PATCH] spi: spidev: fix possible NULL dereference

On Fri, Sep 11, 2015 at 03:11:32PM +0300, Jarkko Nikula wrote:

> Actually this fixes a *real* NULL dereference case but it is not related to
> normal open/close life cycle of spidev. It requires that spidev is kept open
> when SPI master is removed.

> spidev->spi is set to NULL in spidev_remove() and it is called before
> spidev_release() in case master is removed while spidev is in use

> It would be good to update this to commit log, add a tag below and Cc
> <stable@...r.kernel.org>

> Fixes: 9169051617df ("spi: spidev: Don't mangle max_speed_hz in underlying
> spi device")

The patch was already applied :(

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