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| author | Cong Wang <xiyou.wangcong@gmail.com> | 2017-11-01 10:23:49 -0700 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2017-11-03 10:30:38 +0900 |
| commit | a159d3c4b8291998c018f0dbddd4678315264a1e (patch) | |
| tree | bbc6afb3b37bb06103e40b963eca79685bc49768 /net/sched | |
| parent | 74784da82ff74379d0583a3ffe42835888705ac7 (diff) | |
| download | linux-stable-a159d3c4b8291998c018f0dbddd4678315264a1e.tar.gz linux-stable-a159d3c4b8291998c018f0dbddd4678315264a1e.tar.bz2 linux-stable-a159d3c4b8291998c018f0dbddd4678315264a1e.zip | |
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.c | 2 |
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--; |