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can: deny filterlist access on non-CAN interfaces 

In commit 20dd3850bc "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: Oliver Hartkopp <oliver@hartkopp.net>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Oliver Hartkopp 2010-02-02 07:21:34 -08:00 committed by David S. Miller
parent 44298ec0f2
commit 8b64056dac
1 changed files with 6 additions and 0 deletions
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6
net/can/af_can.c
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@ -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) */ /* insert new receiver (dev,canid,mask) -> (func,data) */
if (dev && dev->type != ARPHRD_CAN)
return -ENODEV;
r = kmem_cache_alloc(rcv_cache, GFP_KERNEL); r = kmem_cache_alloc(rcv_cache, GFP_KERNEL);
if (!r) if (!r)
return -ENOMEM; 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 hlist_node *next;
struct dev_rcv_lists *d; struct dev_rcv_lists *d;
if (dev && dev->type != ARPHRD_CAN)
return;
spin_lock(&can_rcvlists_lock); spin_lock(&can_rcvlists_lock);
d = find_dev_rcv_lists(dev); d = find_dev_rcv_lists(dev);