diff options
| author | Denis Efremov <yefremov.denis@gmail.com> | 2012-08-11 20:26:31 +0000 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2012-08-12 13:40:48 -0700 |
| commit | 3a7f8c34fefb109903af9a0fac6d0d05f93335c5 (patch) | |
| tree | 486426c2c3c3add25526788faf06dd93f99ec12a | |
| parent | 2359a47671fc4fb0fe5e9945f76c2cb10792c0f8 (diff) | |
macvtap: rcu_dereference outside read-lock section
rcu_dereference occurs in update section. Replacement by
rcu_dereference_protected in order to prevent lockdep
complaint.
Found by Linux Driver Verification project (linuxtesting.org)
Signed-off-by: Denis Efremov <yefremov.denis@gmail.com>
Acked-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
| -rw-r--r-- | drivers/net/macvtap.c | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/drivers/net/macvtap.c b/drivers/net/macvtap.c index 0737bd4d1669..0f0f9ce3a776 100644 --- a/drivers/net/macvtap.c +++ b/drivers/net/macvtap.c @@ -94,7 +94,8 @@ static int get_slot(struct macvlan_dev *vlan, struct macvtap_queue *q) int i; for (i = 0; i < MAX_MACVTAP_QUEUES; i++) { - if (rcu_dereference(vlan->taps[i]) == q) + if (rcu_dereference_protected(vlan->taps[i], + lockdep_is_held(&macvtap_lock)) == q) return i; } |