Commit 8b64056d authored by Oliver Hartkopp's avatar Oliver Hartkopp Committed by David S. Miller
Browse files

can: deny filterlist access on non-CAN interfaces

In commit 20dd3850

 "can: Speed up CAN frame
receiption by using ml_priv" the formerly used hlist of receiver lists for
each CAN netdevice has been replaced. 

The hlist content ensured only CAN netdevices to be accessed by the
can_rx_(un)register() functions which accidently dropped away together with
the hlist receiver implementation.

This patch re-introduces the check for CAN netdevices in can_rx_(un)register().
Signed-off-by: default avatarOliver Hartkopp <oliver@hartkopp.net>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent 44298ec0
......@@ -415,6 +415,9 @@ int can_rx_register(struct net_device *dev, canid_t can_id, canid_t mask,
/* insert new receiver (dev,canid,mask) -> (func,data) */
if (dev && dev->type != ARPHRD_CAN)
return -ENODEV;
r = kmem_cache_alloc(rcv_cache, GFP_KERNEL);
if (!r)
return -ENOMEM;
......@@ -478,6 +481,9 @@ void can_rx_unregister(struct net_device *dev, canid_t can_id, canid_t mask,
struct hlist_node *next;
struct dev_rcv_lists *d;
if (dev && dev->type != ARPHRD_CAN)
return;
spin_lock(&can_rcvlists_lock);
d = find_dev_rcv_lists(dev);
......
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