rose: device refcount leak
While hunting dev_put() for net-next-2.6, I found a device refcount
leak in ROSE, ioctl(SIOCADDRT) error path.
Fix is to not touch device refcount, as we hold RTNL
Signed-off-by: Eric Dumazet <eric.dumazet@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/net/rose/rose_route.c b/net/rose/rose_route.c
index 9478d9b..f3e2198 100644
--- a/net/rose/rose_route.c
+++ b/net/rose/rose_route.c
@@ -578,18 +578,18 @@
/*
* Check that the device given is a valid AX.25 interface that is "up".
+ * called whith RTNL
*/
-static struct net_device *rose_ax25_dev_get(char *devname)
+static struct net_device *rose_ax25_dev_find(char *devname)
{
struct net_device *dev;
- if ((dev = dev_get_by_name(&init_net, devname)) == NULL)
+ if ((dev = __dev_get_by_name(&init_net, devname)) == NULL)
return NULL;
if ((dev->flags & IFF_UP) && dev->type == ARPHRD_AX25)
return dev;
- dev_put(dev);
return NULL;
}
@@ -720,27 +720,23 @@
case SIOCADDRT:
if (copy_from_user(&rose_route, arg, sizeof(struct rose_route_struct)))
return -EFAULT;
- if ((dev = rose_ax25_dev_get(rose_route.device)) == NULL)
+ if ((dev = rose_ax25_dev_find(rose_route.device)) == NULL)
return -EINVAL;
- if (rose_dev_exists(&rose_route.address)) { /* Can't add routes to ourself */
- dev_put(dev);
+ if (rose_dev_exists(&rose_route.address)) /* Can't add routes to ourself */
return -EINVAL;
- }
if (rose_route.mask > 10) /* Mask can't be more than 10 digits */
return -EINVAL;
if (rose_route.ndigis > AX25_MAX_DIGIS)
return -EINVAL;
err = rose_add_node(&rose_route, dev);
- dev_put(dev);
return err;
case SIOCDELRT:
if (copy_from_user(&rose_route, arg, sizeof(struct rose_route_struct)))
return -EFAULT;
- if ((dev = rose_ax25_dev_get(rose_route.device)) == NULL)
+ if ((dev = rose_ax25_dev_find(rose_route.device)) == NULL)
return -EINVAL;
err = rose_del_node(&rose_route, dev);
- dev_put(dev);
return err;
case SIOCRSCLRRT: