From f44f340883388b57fe03edfb0982e038e57a992c Mon Sep 17 00:00:00 2001 From: Jesse Gross Date: Mon, 13 May 2013 08:15:26 -0700 Subject: [PATCH] openvswitch: Immediately exit on error in ovs_vport_cmd_set(). It is an error to try to change the type of a vport using the set command. However, while we check that this is an error, we still proceed to allocate memory which then gets freed immediately. This stops processing after noticing the error, which does not actually fix a bug but is more correct. Signed-off-by: Jesse Gross --- net/openvswitch/datapath.c | 12 +++++++----- 1 file changed, 7 insertions(+), 5 deletions(-) diff --git a/net/openvswitch/datapath.c b/net/openvswitch/datapath.c index d12d6b8b5e8b..748aa97cbfb2 100644 --- a/net/openvswitch/datapath.c +++ b/net/openvswitch/datapath.c @@ -1812,10 +1812,11 @@ static int ovs_vport_cmd_set(struct sk_buff *skb, struct genl_info *info) if (IS_ERR(vport)) goto exit_unlock; - err = 0; if (a[OVS_VPORT_ATTR_TYPE] && - nla_get_u32(a[OVS_VPORT_ATTR_TYPE]) != vport->ops->type) + nla_get_u32(a[OVS_VPORT_ATTR_TYPE]) != vport->ops->type) { err = -EINVAL; + goto exit_unlock; + } reply = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL); if (!reply) { @@ -1823,10 +1824,11 @@ static int ovs_vport_cmd_set(struct sk_buff *skb, struct genl_info *info) goto exit_unlock; } - if (!err && a[OVS_VPORT_ATTR_OPTIONS]) + if (a[OVS_VPORT_ATTR_OPTIONS]) { err = ovs_vport_set_options(vport, a[OVS_VPORT_ATTR_OPTIONS]); - if (err) - goto exit_free; + if (err) + goto exit_free; + } if (a[OVS_VPORT_ATTR_UPCALL_PID]) vport->upcall_portid = nla_get_u32(a[OVS_VPORT_ATTR_UPCALL_PID]); -- 2.34.1