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From: Dan Carpenter <error27@gmail.com>
To: Dmitry Torokhov <dmitry.torokhov@gmail.com>
Cc: Mike Frysinger <vapier@gentoo.org>,
	Michael Hennerich <michael.hennerich@analog.com>,
	Chris Verges <chrisv@cyberswitching.com>,
	Luotao Fu <l.fu@pengutronix.de>,
	linux-input@vger.kernel.org, kernel-janitors@vger.kernel.org
Subject: [patch -next] input: adxl34x: fix leak and use after free
Date: Thu, 22 Jul 2010 08:55:52 +0000	[thread overview]
Message-ID: <20100722085552.GW17585@bicker> (raw)

These are a couple smatch issues.  In the original code, if only one of
the allocation fails we leak the other variable so we should goto
out_free_mem.

Also there was a use after free if debugging was enabled and so I moved
the kfree() down a line.

Signed-off-by: Dan Carpenter <error27@gmail.com>

diff --git a/drivers/input/misc/adxl34x.c b/drivers/input/misc/adxl34x.c
index bb9c10f..e925d12 100644
--- a/drivers/input/misc/adxl34x.c
+++ b/drivers/input/misc/adxl34x.c
@@ -709,7 +709,7 @@ struct adxl34x *adxl34x_probe(struct device *dev, int irq,
 	input_dev = input_allocate_device();
 	if (!ac || !input_dev) {
 		err = -ENOMEM;
-		goto err_out;
+		goto err_free_mem;
 	}
 
 	ac->fifo_delay = fifo_delay_default;
@@ -904,9 +904,9 @@ int adxl34x_remove(struct adxl34x *ac)
 	sysfs_remove_group(&ac->dev->kobj, &adxl34x_attr_group);
 	free_irq(ac->irq, ac);
 	input_unregister_device(ac->input);
+	dev_dbg(ac->dev, "unregistered accelerometer\n");
 	kfree(ac);
 
-	dev_dbg(ac->dev, "unregistered accelerometer\n");
 	return 0;
 }
 EXPORT_SYMBOL_GPL(adxl34x_remove);

WARNING: multiple messages have this Message-ID (diff)
From: Dan Carpenter <error27@gmail.com>
To: Dmitry Torokhov <dmitry.torokhov@gmail.com>
Cc: Mike Frysinger <vapier@gentoo.org>,
	Michael Hennerich <michael.hennerich@analog.com>,
	Chris Verges <chrisv@cyberswitching.com>,
	Luotao Fu <l.fu@pengutronix.de>,
	linux-input@vger.kernel.org, kernel-janitors@vger.kernel.org
Subject: [patch -next] input: adxl34x: fix leak and use after free
Date: Thu, 22 Jul 2010 10:55:52 +0200	[thread overview]
Message-ID: <20100722085552.GW17585@bicker> (raw)

These are a couple smatch issues.  In the original code, if only one of
the allocation fails we leak the other variable so we should goto
out_free_mem.

Also there was a use after free if debugging was enabled and so I moved
the kfree() down a line.

Signed-off-by: Dan Carpenter <error27@gmail.com>

diff --git a/drivers/input/misc/adxl34x.c b/drivers/input/misc/adxl34x.c
index bb9c10f..e925d12 100644
--- a/drivers/input/misc/adxl34x.c
+++ b/drivers/input/misc/adxl34x.c
@@ -709,7 +709,7 @@ struct adxl34x *adxl34x_probe(struct device *dev, int irq,
 	input_dev = input_allocate_device();
 	if (!ac || !input_dev) {
 		err = -ENOMEM;
-		goto err_out;
+		goto err_free_mem;
 	}
 
 	ac->fifo_delay = fifo_delay_default;
@@ -904,9 +904,9 @@ int adxl34x_remove(struct adxl34x *ac)
 	sysfs_remove_group(&ac->dev->kobj, &adxl34x_attr_group);
 	free_irq(ac->irq, ac);
 	input_unregister_device(ac->input);
+	dev_dbg(ac->dev, "unregistered accelerometer\n");
 	kfree(ac);
 
-	dev_dbg(ac->dev, "unregistered accelerometer\n");
 	return 0;
 }
 EXPORT_SYMBOL_GPL(adxl34x_remove);

             reply	other threads:[~2010-07-22  8:55 UTC|newest]

Thread overview: 4+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2010-07-22  8:55 Dan Carpenter [this message]
2010-07-22  8:55 ` [patch -next] input: adxl34x: fix leak and use after free Dan Carpenter
2010-07-23  6:44 ` Dmitry Torokhov
2010-07-23  6:44   ` Dmitry Torokhov

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