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| author | Stephen Hemminger <shemminger@osdl.org> | 2006-05-25 15:09:37 -0700 |
|---|---|---|
| committer | David S. Miller <davem@sunset.davemloft.net> | 2006-06-17 21:26:04 -0700 |
| commit | 23dbe7912dad6be71bb9e69cb819d05e2442d362 (patch) | |
| tree | 89fedd1d2c2c1ab710cfd90e8a8bb1f513935797 /net/llc | |
| parent | 29efcd2666b3a465b40aa07ef1f4d79847303e2f (diff) | |
| download | lwn-23dbe7912dad6be71bb9e69cb819d05e2442d362.tar.gz lwn-23dbe7912dad6be71bb9e69cb819d05e2442d362.zip | |
[LLC]: use rcu_dereference on receive handler
The receive hander pointer might be modified during network changes
of protocol. So use rcu_dereference (only matters on alpha).
Signed-off-by: Stephen Hemminger <shemminger@osdl.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/llc')
| -rw-r--r-- | net/llc/llc_input.c | 7 |
1 files changed, 5 insertions, 2 deletions
diff --git a/net/llc/llc_input.c b/net/llc/llc_input.c index d62e0f9b9da3..cb9f7f058f75 100644 --- a/net/llc/llc_input.c +++ b/net/llc/llc_input.c @@ -142,6 +142,8 @@ int llc_rcv(struct sk_buff *skb, struct net_device *dev, struct llc_sap *sap; struct llc_pdu_sn *pdu; int dest; + int (*rcv)(struct sk_buff *, struct net_device *, + struct packet_type *, struct net_device *); /* * When the interface is in promisc. mode, drop all the crap that it @@ -169,8 +171,9 @@ int llc_rcv(struct sk_buff *skb, struct net_device *dev, * First the upper layer protocols that don't need the full * LLC functionality */ - if (sap->rcv_func) { - sap->rcv_func(skb, dev, pt, orig_dev); + rcv = rcu_dereference(sap->rcv_func); + if (rcv) { + rcv(skb, dev, pt, orig_dev); goto out_put; } dest = llc_pdu_type(skb); |