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| author | Oliver Hartkopp <oliver@hartkopp.net> | 2010-02-02 07:21:34 -0800 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2010-02-02 07:21:34 -0800 |
| commit | 8b64056dacf6ec81986d63dff96fca039fe95f6e (patch) | |
| tree | 80119c42025a48ab9dacd90906794d8c2df05164 /net/can/af_can.c | |
| parent | 44298ec0f20c45b9be96e181976aef1152d373b2 (diff) | |
| download | lwn-8b64056dacf6ec81986d63dff96fca039fe95f6e.tar.gz lwn-8b64056dacf6ec81986d63dff96fca039fe95f6e.zip | |
can: deny filterlist access on non-CAN interfaces
In commit 20dd3850bcf860561496827b711fa10fecf6e787 "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>
Diffstat (limited to 'net/can/af_can.c')
| -rw-r--r-- | net/can/af_can.c | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/net/can/af_can.c b/net/can/af_can.c index bc18b084ffdb..702be5a2c956 100644 --- a/net/can/af_can.c +++ b/net/can/af_can.c @@ -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); |