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authorCong Wang <xiyou.wangcong@gmail.com>2017-11-01 10:23:50 -0700
committerDavid S. Miller <davem@davemloft.net>2017-11-03 10:30:38 +0900
commitceffcc5e254b450e6159f173e4538215cebf1b59 (patch)
treee774e0c77b5f8a2979794ed08cc93b6365852114 /fs/romfs
parenta159d3c4b8291998c018f0dbddd4678315264a1e (diff)
net_sched: hold netns refcnt for each action
TC actions have been destroyed asynchronously for a long time, previously in a RCU callback and now in a workqueue. If we don't hold a refcnt for its netns, we could use the per netns data structure, struct tcf_idrinfo, after it has been freed by netns workqueue. Hold refcnt to ensure netns destroy happens after all actions are gone. 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>
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