USB: mem leak fixes for AMD 5536 UDC high/full speed USB device controller driver

In drivers/usb/gadget/amd5536udc.c::udc_pci_probe(), sizeof(struct udc)
storage is allocated for 'dev'.

There are many exit points from the function where 'dev' is not free'd but has
also not yet been used for anything.  The following patch free's 'dev' at the
return points where it has not yet been used.

Signed-off-by: Jesper Juhl <jesper.juhl@gmail.com>
Cc: David Brownell <dbrownell@users.sourceforge.net>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

diff --git a/drivers/usb/gadget/amd5536udc.c b/drivers/usb/gadget/amd5536udc.c
index b663f23..fc6f348 100644 (file)
--- a/drivers/usb/gadget/amd5536udc.c
+++ b/drivers/usb/gadget/amd5536udc.c
@@ -3248,6 +3248,8 @@ static int udc_pci_probe(
 
        /* pci setup */
        if (pci_enable_device(pdev) < 0) {
+               kfree(dev);
+               dev = 0;
                retval = -ENODEV;
                goto finished;
        }
@@ -3259,6 +3261,8 @@ static int udc_pci_probe(
 
        if (!request_mem_region(resource, len, name)) {
                dev_dbg(&pdev->dev, "pci device used already\n");
+               kfree(dev);
+               dev = 0;
                retval = -EBUSY;
                goto finished;
        }
@@ -3267,18 +3271,24 @@ static int udc_pci_probe(
        dev->virt_addr = ioremap_nocache(resource, len);
        if (dev->virt_addr == NULL) {
                dev_dbg(&pdev->dev, "start address cannot be mapped\n");
+               kfree(dev);
+               dev = 0;
                retval = -EFAULT;
                goto finished;
        }
 
        if (!pdev->irq) {
                dev_err(&dev->pdev->dev, "irq not set\n");
+               kfree(dev);
+               dev = 0;
                retval = -ENODEV;
                goto finished;
        }
 
        if (request_irq(pdev->irq, udc_irq, IRQF_SHARED, name, dev) != 0) {
                dev_dbg(&dev->pdev->dev, "request_irq(%d) fail\n", pdev->irq);
+               kfree(dev);
+               dev = 0;
                retval = -EBUSY;
                goto finished;
        }