commit 35c55fc156d85a396a975fc17636f560fc02fd65
author Cong Wang <xiyou.wangcong@gmail.com> Mon Nov 06 13:47:30 2017 -0800
committer David S. Miller <davem@davemloft.net> Thu Nov 09 10:03:10 2017 +0900
tree 4600cfecab2372a77cfb9143e4b24b059d24433a
parent f2b751053ee9314e82c178f6ca0fee7e160fac95

cls_u32: use tcf_exts_get_net() before call_rcu()

Hold netns refcnt before call_rcu() and release it after
the tcf_exts_destroy() is done.

Note, on ->destroy() path we have to respect the return value
of tcf_exts_get_net(), on other paths it should always return
true, so we don't need to care.

Cc: 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>