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| author | Zhengchao Shao <shaozhengchao@huawei.com> | 2022-09-27 15:48:53 +0300 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2022-10-02 18:07:17 +0300 |
| commit | 4e6263ec8bc965f0bd1c24bb40694a38e382e7a9 (patch) | |
| tree | c02719d506db20f6944340f21e127f074dca6229 /net | |
| parent | bc37b24ee05e3fc4eae3e51c25572ccda9c34c11 (diff) | |
| download | linux-4e6263ec8bc965f0bd1c24bb40694a38e382e7a9.tar.xz | |
net: sched: ensure n arg not empty before call bind_class
All bind_class callbacks are directly returned when n arg is empty.
Therefore, bind_class is invoked only when n arg is not empty.
Signed-off-by: Zhengchao Shao <shaozhengchao@huawei.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net')
| -rw-r--r-- | net/sched/sch_api.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/net/sched/sch_api.c b/net/sched/sch_api.c index 7c15f1f3da17..c98af0ada706 100644 --- a/net/sched/sch_api.c +++ b/net/sched/sch_api.c @@ -1915,7 +1915,7 @@ static int tcf_node_bind(struct tcf_proto *tp, void *n, struct tcf_walker *arg) { struct tcf_bind_args *a = (void *)arg; - if (tp->ops->bind_class) { + if (n && tp->ops->bind_class) { struct Qdisc *q = tcf_block_q(tp->chain->block); sch_tree_lock(q); |