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From: Dan Carpenter <dan.carpenter@oracle.com>
To: Jonathan Cameron <jic23@kernel.org>, Marek Belisko <marek@goldelico.com>
Cc: Hartmut Knaack <knaack.h@gmx.de>,
	Lars-Peter Clausen <lars@metafoo.de>,
	Peter Meerwald <pmeerw@pmeerw.net>,
	linux-iio@vger.kernel.org, linux-kernel@vger.kernel.org,
	kernel-janitors@vger.kernel.org
Subject: [patch] iio: inkern: fix a NULL dereference on error
Date: Tue, 26 Jan 2016 09:25:21 +0000	[thread overview]
Message-ID: <20160126092521.GC15717@mwanda> (raw)

In twl4030_bci_probe() there are some failure paths where we call
iio_channel_release() with a NULL pointer.  (Apparently, that driver can
opperate without a valid channel pointer).  Let's fix it by adding a
NULL check in iio_channel_release().

Fixes: 2202e1fc5a29 ('drivers: power: twl4030_charger: fix link problems when building as module')
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>

diff --git a/drivers/iio/inkern.c b/drivers/iio/inkern.c
index 80fbbfd..734a004 100644
--- a/drivers/iio/inkern.c
+++ b/drivers/iio/inkern.c
@@ -349,6 +349,8 @@ EXPORT_SYMBOL_GPL(iio_channel_get);
 
 void iio_channel_release(struct iio_channel *channel)
 {
+	if (!channel)
+		return;
 	iio_device_put(channel->indio_dev);
 	kfree(channel);
 }

WARNING: multiple messages have this Message-ID (diff)
From: Dan Carpenter <dan.carpenter@oracle.com>
To: Jonathan Cameron <jic23@kernel.org>, Marek Belisko <marek@goldelico.com>
Cc: Hartmut Knaack <knaack.h@gmx.de>,
	Lars-Peter Clausen <lars@metafoo.de>,
	Peter Meerwald <pmeerw@pmeerw.net>,
	linux-iio@vger.kernel.org, linux-kernel@vger.kernel.org,
	kernel-janitors@vger.kernel.org
Subject: [patch] iio: inkern: fix a NULL dereference on error
Date: Tue, 26 Jan 2016 12:25:21 +0300	[thread overview]
Message-ID: <20160126092521.GC15717@mwanda> (raw)

In twl4030_bci_probe() there are some failure paths where we call
iio_channel_release() with a NULL pointer.  (Apparently, that driver can
opperate without a valid channel pointer).  Let's fix it by adding a
NULL check in iio_channel_release().

Fixes: 2202e1fc5a29 ('drivers: power: twl4030_charger: fix link problems when building as module')
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>

diff --git a/drivers/iio/inkern.c b/drivers/iio/inkern.c
index 80fbbfd..734a004 100644
--- a/drivers/iio/inkern.c
+++ b/drivers/iio/inkern.c
@@ -349,6 +349,8 @@ EXPORT_SYMBOL_GPL(iio_channel_get);
 
 void iio_channel_release(struct iio_channel *channel)
 {
+	if (!channel)
+		return;
 	iio_device_put(channel->indio_dev);
 	kfree(channel);
 }

             reply	other threads:[~2016-01-26  9:25 UTC|newest]

Thread overview: 3+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2016-01-26  9:25 Dan Carpenter [this message]
2016-01-26  9:25 ` [patch] iio: inkern: fix a NULL dereference on error Dan Carpenter
2016-01-30 15:39 ` Jonathan Cameron

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