PKT_SCHED: Fix error handling while dumping actions

"return -err" and blindly inheriting the error code in the netlink
failure exception handler causes errors codes to be returned as
positive value therefore making them being ignored by the caller.

May lead to sending out incomplete netlink messages.

Signed-off-by: Thomas Graf <tgraf@suug.ch>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Chris Wright <chrisw@sous-sol.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

diff --git a/net/sched/act_api.c b/net/sched/act_api.c
index 67c31f90d56c6e1d309c6c00e0ddb6d217df91b2..eb7dc2947a0a2212eac81dfbd320d1c20179548f 100644 (file)
--- a/net/sched/act_api.c
+++ b/net/sched/act_api.c
@@ -251,15 +251,17 @@ tcf_action_dump(struct sk_buff *skb, struct tc_action *act, int bind, int ref)
                RTA_PUT(skb, a->order, 0, NULL);
                err = tcf_action_dump_1(skb, a, bind, ref);
                if (err < 0)
-                       goto rtattr_failure;
+                       goto errout;
                r->rta_len = skb->tail - (u8*)r;
        }
 
        return 0;
 
 rtattr_failure:
+       err = -EINVAL;
+errout:
        skb_trim(skb, b - skb->data);
-       return -err;
+       return err;
 }
 
 struct tc_action *tcf_action_init_1(struct rtattr *rta, struct rtattr *est,