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openvswitch: Immediately exit on error in ovs_vport_cmd_set().

Browse Source 
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 <jesse@nicira.com>
This commit is contained in:
Jesse Gross 2013-05-13 08:15:26 -07:00
parent f722406faa
commit f44f340883
1 changed files with 7 additions and 5 deletions
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12
net/openvswitch/datapath.c
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@ -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]);