From: Oliver Neukum <oliver@neukum.org>
Date: Mon, 30 Jun 2008 12:33:57 +0000 (+0200)
Subject: USB: fix double kfree in ipaq in error case
X-Git-Tag: v2.6.27-rc1~946^2~5
X-Git-Url: http://pilppa.com/gitweb/?a=commitdiff_plain;h=df3e1ab7334279bc744344bcf05272dc8b985d3d;p=linux-2.6-omap-h63xx.git

USB: fix double kfree in ipaq in error case

in the error case the ipaq driver leaves a dangling pointer to already
freed memory that will be freed again.

Signed-off-by: Oliver Neukum <oneukum@suse.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
---

diff --git a/drivers/usb/serial/ipaq.c b/drivers/usb/serial/ipaq.c
index d9fb3768a2d..80d9ec5570d 100644
--- a/drivers/usb/serial/ipaq.c
+++ b/drivers/usb/serial/ipaq.c
@@ -646,12 +646,13 @@ static int ipaq_open(struct usb_serial_port *port, struct file *filp)
 	 */
 
 	kfree(port->bulk_in_buffer);
-	kfree(port->bulk_out_buffer);
 	port->bulk_in_buffer = kmalloc(URBDATA_SIZE, GFP_KERNEL);
 	if (port->bulk_in_buffer == NULL) {
 		port->bulk_out_buffer = NULL; /* prevent double free */
 		goto enomem;
 	}
+
+	kfree(port->bulk_out_buffer);
 	port->bulk_out_buffer = kmalloc(URBDATA_SIZE, GFP_KERNEL);
 	if (port->bulk_out_buffer == NULL) {
 		kfree(port->bulk_in_buffer);