Commit ae81feb7 authored by Yunjian Wang's avatar Yunjian Wang Committed by David S. Miller

sch_htb: fix null pointer dereference on a null new_q

sch_htb: fix null pointer dereference on a null new_q

Currently if new_q is null, the null new_q pointer will be
dereference when 'q->offload' is true. Fix this by adding
a braces around htb_parent_to_leaf_offload() to avoid it.

Addresses-Coverity: ("Dereference after null check")
Fixes: d03b195b ("sch_htb: Hierarchical QoS hardware offload")
Signed-off-by: default avatarYunjian Wang <wangyunjian@huawei.com>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent 8a03dd92
......@@ -1675,11 +1675,12 @@ static int htb_delete(struct Qdisc *sch, unsigned long arg,
cl->parent->common.classid,
NULL);
if (q->offload) {
if (new_q)
if (new_q) {
htb_set_lockdep_class_child(new_q);
htb_parent_to_leaf_offload(sch, dev_queue, new_q);
}
}
}
sch_tree_lock(sch);
......
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