net_sched: fix errno in tcindex_set_parms()

When kmemdup() fails, we should return -ENOMEM.

Cc: John Fastabend <john.fastabend@gmail.com>
Signed-off-by: Cong Wang <xiyou.wangcong@gmail.com>
Acked-by: John Fastabend <john.r.fastabend@intel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

diff --git a/net/sched/cls_tcindex.c b/net/sched/cls_tcindex.c
index e3c6fa3..365b23b 100644 (file)
--- a/net/sched/cls_tcindex.c
+++ b/net/sched/cls_tcindex.c
@@ -237,15 +237,14 @@ tcindex_set_parms(struct net *net, struct tcf_proto *tp, unsigned long base,
        if (err < 0)
                return err;
 
+       err = -ENOMEM;
        /* tcindex_data attributes must look atomic to classifier/lookup so
         * allocate new tcindex data and RCU assign it onto root. Keeping
         * perfect hash and hash pointers from old data.
         */
        cp = kzalloc(sizeof(*cp), GFP_KERNEL);
-       if (!cp) {
-               err = -ENOMEM;
+       if (!cp)
                goto errout;
-       }
 
        cp->mask = p->mask;
        cp->shift = p->shift;