From b057df24a7536cce6c372efe9d0e3d1558afedf4 Mon Sep 17 00:00:00 2001
From: =?utf8?q?Ignacy=20Gaw=C4=99dzki?=
 <ignacy.gawedzki@green-communications.fr>
Date: Tue, 3 Feb 2015 19:05:18 +0100
Subject: [PATCH] cls_api.c: Fix dumping of non-existing actions' stats.
MIME-Version: 1.0
Content-Type: text/plain; charset=utf8
Content-Transfer-Encoding: 8bit

In tcf_exts_dump_stats(), ensure that exts->actions is not empty before
accessing the first element of that list and calling tcf_action_copy_stats()
on it.  This fixes some random segvs when adding filters of type "basic" with
no particular action.

This also fixes the dumping of those "no-action" filters, which more often
than not made calls to tcf_action_copy_stats() fail and consequently netlink
attributes added by the caller to be removed by a call to nla_nest_cancel().

Fixes: 33be62715991 ("net_sched: act: use standard struct list_head")
Signed-off-by: Ignacy Gawędzki <ignacy.gawedzki@green-communications.fr>
Acked-by: Cong Wang <cwang@twopensource.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
---
Reading git-format-patch failed