staging: vme: fix for a potential NULL pointer dereference

Audit the return value of cdev_alloc and hence fixes a potential NULL pointer
dereferencing.

Signed-off-by: Kumar Amit Mehta <gmate.amit@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/drivers/staging/vme/devices/vme_user.c b/drivers/staging/vme/devices/vme_user.c
index d074b1ecb41a8e21e5c0852b6777fb1dceaf632d..da7f759849792060678671cb3a5f70b17a8c4373 100644 (file)
--- a/drivers/staging/vme/devices/vme_user.c
+++ b/drivers/staging/vme/devices/vme_user.c
@@ -710,6 +710,10 @@ static int vme_user_probe(struct vme_dev *vdev)
 
        /* Register the driver as a char device */
        vme_user_cdev = cdev_alloc();
+       if (!vme_user_cdev) {
+               err = -ENOMEM;
+               goto err_char;
+       }
        vme_user_cdev->ops = &vme_user_fops;
        vme_user_cdev->owner = THIS_MODULE;
        err = cdev_add(vme_user_cdev, MKDEV(VME_MAJOR, 0), VME_DEVS);