diff options
| author | Cong Wang <xiyou.wangcong@gmail.com> | 2020-09-22 20:56:23 -0700 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2020-10-14 10:33:06 +0200 |
| commit | a5de4ee6d055899b67bfb41722bbeb5c6e0fba70 (patch) | |
| tree | 9b5c4c978b8905d904d134e7ea53cbbbe774913c /include | |
| parent | dbb763107d3ee8ecfe1fc0e262158339e9875892 (diff) | |
net_sched: defer tcf_idr_insert() in tcf_action_init_1()
commit e49d8c22f1261c43a986a7fdbf677ac309682a07 upstream.
All TC actions call tcf_idr_insert() for new action at the end
of their ->init(), so we can actually move it to a central place
in tcf_action_init_1().
And once the action is inserted into the global IDR, other parallel
process could free it immediately as its refcnt is still 1, so we can
not fail after this, we need to move it after the goto action
validation to avoid handling the failure case after insertion.
This is found during code review, is not directly triggered by syzbot.
And this prepares for the next patch.
Cc: Vlad Buslov <vladbu@mellanox.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>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'include')
| -rw-r--r-- | include/net/act_api.h | 2 |
1 files changed, 0 insertions, 2 deletions
diff --git a/include/net/act_api.h b/include/net/act_api.h index 59d05feecfb8..05b568b92e59 100644 --- a/include/net/act_api.h +++ b/include/net/act_api.h @@ -156,8 +156,6 @@ int tcf_idr_search(struct tc_action_net *tn, struct tc_action **a, u32 index); int tcf_idr_create(struct tc_action_net *tn, u32 index, struct nlattr *est, struct tc_action **a, const struct tc_action_ops *ops, int bind, bool cpustats); -void tcf_idr_insert(struct tc_action_net *tn, struct tc_action *a); - void tcf_idr_cleanup(struct tc_action_net *tn, u32 index); int tcf_idr_check_alloc(struct tc_action_net *tn, u32 *index, struct tc_action **a, int bind); |