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net_sched: fix a missing refcnt in tcindex_init()

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The initial refcnt of struct tcindex_data should be 1,
it is clear that I forgot to set it to 1 in tcindex_init().
This leads to a dec-after-zero warning.

Reported-by: syzbot+8325e509a1bf83ec741d@syzkaller.appspotmail.com
Fixes: 304e024216 ("net_sched: add a temporary refcnt for struct tcindex_data")
Cc: Jamal Hadi Salim <jhs@mojatatu.com>
Cc: Jiri Pirko <jiri@resnulli.us>
Cc: Paul E. McKenney <paulmck@kernel.org>
Signed-off-by: Cong Wang <xiyou.wangcong@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Cong Wang 2020-04-02 20:58:51 -07:00 committed by David S. Miller
parent 3e1221acf6
commit a8eab6d35e
1 changed files with 1 additions and 0 deletions
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net/sched/cls_tcindex.c
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@ -151,6 +151,7 @@ static int tcindex_init(struct tcf_proto *tp)
p->mask = 0xffff;
p->hash = DEFAULT_HASH_SIZE;
p->fall_through = 1;
refcount_set(&p->refcnt, 1); /* Paired with tcindex_destroy_work() */
rcu_assign_pointer(tp->root, p);
return 0;