diff options
| author | Andy Zhou <azhou@nicira.com> | 2014-01-21 09:31:04 -0800 |
|---|---|---|
| committer | Jesse Gross <jesse@nicira.com> | 2014-02-04 22:21:17 -0800 |
| commit | e80857cce82da31e41a6599fc888dfc92e0167cc (patch) | |
| tree | 307e621f4780b302065c4a922cab850c864ceab6 /net/openvswitch/datapath.c | |
| parent | aea0bb4f8ee513537ad84b9f3f609f96e272d98e (diff) | |
openvswitch: Fix kernel panic on ovs_flow_free
Both mega flow mask's reference counter and per flow table mask list
should only be accessed when holding ovs_mutex() lock. However
this is not true with ovs_flow_table_flush(). The patch fixes this bug.
Reported-by: Joe Stringer <joestringer@nicira.com>
Signed-off-by: Andy Zhou <azhou@nicira.com>
Signed-off-by: Jesse Gross <jesse@nicira.com>
Diffstat (limited to 'net/openvswitch/datapath.c')
| -rw-r--r-- | net/openvswitch/datapath.c | 9 |
1 files changed, 6 insertions, 3 deletions
diff --git a/net/openvswitch/datapath.c b/net/openvswitch/datapath.c index d1a73a6102f..e1b337e0bf4 100644 --- a/net/openvswitch/datapath.c +++ b/net/openvswitch/datapath.c @@ -55,6 +55,7 @@ #include "datapath.h" #include "flow.h" +#include "flow_table.h" #include "flow_netlink.h" #include "vport-internal_dev.h" #include "vport-netdev.h" @@ -160,7 +161,6 @@ static void destroy_dp_rcu(struct rcu_head *rcu) { struct datapath *dp = container_of(rcu, struct datapath, rcu); - ovs_flow_tbl_destroy(&dp->table); free_percpu(dp->stats_percpu); release_net(ovs_dp_get_net(dp)); kfree(dp->ports); @@ -1287,7 +1287,7 @@ err_destroy_ports_array: err_destroy_percpu: free_percpu(dp->stats_percpu); err_destroy_table: - ovs_flow_tbl_destroy(&dp->table); + ovs_flow_tbl_destroy(&dp->table, false); err_free_dp: release_net(ovs_dp_get_net(dp)); kfree(dp); @@ -1314,10 +1314,13 @@ static void __dp_destroy(struct datapath *dp) list_del_rcu(&dp->list_node); /* OVSP_LOCAL is datapath internal port. We need to make sure that - * all port in datapath are destroyed first before freeing datapath. + * all ports in datapath are destroyed first before freeing datapath. */ ovs_dp_detach_port(ovs_vport_ovsl(dp, OVSP_LOCAL)); + /* RCU destroy the flow table */ + ovs_flow_tbl_destroy(&dp->table, true); + call_rcu(&dp->rcu, destroy_dp_rcu); } |