From: Fedor Pchelkin pchelkin@ispras.ru
commit b1c936e9af5dd08636d568736fc6075ed9d1d529 upstream.
In case rhashtable_lookup_insert_fast() fails inside vxlan_vni_add(), the allocated percpu vni stats are not freed on the error path.
Introduce vxlan_vni_free() which would work as a nice wrapper to free vxlan_vni_node resources properly.
Found by Linux Verification Center (linuxtesting.org).
Fixes: 4095e0e1328a ("drivers: vxlan: vnifilter: per vni stats") Suggested-by: Ido Schimmel idosch@idosch.org Signed-off-by: Fedor Pchelkin pchelkin@ispras.ru Signed-off-by: David S. Miller davem@davemloft.net Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org --- drivers/net/vxlan/vxlan_vnifilter.c | 11 ++++++++--- 1 file changed, 8 insertions(+), 3 deletions(-)
--- a/drivers/net/vxlan/vxlan_vnifilter.c +++ b/drivers/net/vxlan/vxlan_vnifilter.c @@ -713,6 +713,12 @@ static struct vxlan_vni_node *vxlan_vni_ return vninode; }
+static void vxlan_vni_free(struct vxlan_vni_node *vninode) +{ + free_percpu(vninode->stats); + kfree(vninode); +} + static int vxlan_vni_add(struct vxlan_dev *vxlan, struct vxlan_vni_group *vg, u32 vni, union vxlan_addr *group, @@ -740,7 +746,7 @@ static int vxlan_vni_add(struct vxlan_de &vninode->vnode, vxlan_vni_rht_params); if (err) { - kfree(vninode); + vxlan_vni_free(vninode); return err; }
@@ -763,8 +769,7 @@ static void vxlan_vni_node_rcu_free(stru struct vxlan_vni_node *v;
v = container_of(rcu, struct vxlan_vni_node, rcu); - free_percpu(v->stats); - kfree(v); + vxlan_vni_free(v); }
static int vxlan_vni_del(struct vxlan_dev *vxlan,