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authorCong Wang <xiyou.wangcong@gmail.com>2017-11-01 20:23:49 +0300
committerDavid S. Miller <davem@davemloft.net>2017-11-03 04:30:38 +0300
commita159d3c4b8291998c018f0dbddd4678315264a1e (patch)
treebbc6afb3b37bb06103e40b963eca79685bc49768 /net/sched
parent74784da82ff74379d0583a3ffe42835888705ac7 (diff)
downloadlinux-a159d3c4b8291998c018f0dbddd4678315264a1e.tar.xz
net_sched: acquire RTNL in tc_action_net_exit()
I forgot to acquire RTNL in tc_action_net_exit() which leads that action ops->cleanup() is not always called with RTNL. This usually is not a big deal because this function is called after all netns refcnt are gone, but given RTNL protects more than just actions, add it for safety and consistency. Also add an assertion to catch other potential bugs. Fixes: ddf97ccdd7cb ("net_sched: add network namespace support for tc actions") Reported-by: Lucas Bates <lucasb@mojatatu.com> Tested-by: Lucas Bates <lucasb@mojatatu.com> Cc: Jamal Hadi Salim <jhs@mojatatu.com> Cc: Jiri Pirko <jiri@resnulli.us> Signed-off-by: Cong Wang <xiyou.wangcong@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/sched')
-rw-r--r--net/sched/act_api.c2
1 files changed, 2 insertions, 0 deletions
diff --git a/net/sched/act_api.c b/net/sched/act_api.c
index da6fa82c98a8..8f2c63514956 100644
--- a/net/sched/act_api.c
+++ b/net/sched/act_api.c
@@ -86,6 +86,8 @@ int __tcf_idr_release(struct tc_action *p, bool bind, bool strict)
{
int ret = 0;
+ ASSERT_RTNL();
+
if (p) {
if (bind)
p->tcfa_bindcnt--;