linux-kernel - [PATCH 3.2 041/152] USB: adutux: NULL dereferences on disconnect

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Date:	Tue, 17 Feb 2015 01:46:53 +0000
From:	Ben Hutchings <ben@...adent.org.uk>
To:	linux-kernel@...r.kernel.org, stable@...r.kernel.org
CC:	akpm@...ux-foundation.org,
	"Dan Carpenter" <dan.carpenter@...cle.com>,
	"Greg Kroah-Hartman" <gregkh@...uxfoundation.org>
Subject: [PATCH 3.2 041/152] USB: adutux: NULL dereferences on disconnect

3.2.67-rc1 review patch.  If anyone has any objections, please let me know.

------------------

From: Dan Carpenter <dan.carpenter@...cle.com>

commit fc625960edecfb57e62c2975d1f155155e28e6ba upstream.

Both "dev->udev" and "interface->dev" are NULL.  These printks are not
very interesting so I just deleted them.

Fixes: 03270634e242 ('USB: Add ADU support for Ontrak ADU devices')
Signed-off-by: Dan Carpenter <dan.carpenter@...cle.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
[bwh: Backported to 3.2: adjust context]
Signed-off-by: Ben Hutchings <ben@...adent.org.uk>
---
--- a/drivers/usb/misc/adutux.c
+++ b/drivers/usb/misc/adutux.c
@@ -865,15 +865,11 @@ static void adu_disconnect(struct usb_in
 	usb_set_intfdata(interface, NULL);
 
 	/* if the device is not opened, then we clean up right now */
-	dbg(2," %s : open count %d", __func__, dev->open_count);
 	if (!dev->open_count)
 		adu_delete(dev);
 
 	mutex_unlock(&adutux_mutex);
 
-	dev_info(&interface->dev, "ADU device adutux%d now disconnected\n",
-		 (minor - ADU_MINOR_BASE));
-
 	dbg(2," %s : leave", __func__);
 }
 

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