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hsr: implement dellink to clean up resources

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hsr_link_ops implements ->newlink() but not ->dellink(),
which leads that resources not released after removing the device,
particularly the entries in self_node_db and node_db.

So add ->dellink() implementation to replace the priv_destructor.
This also makes the code slightly easier to understand.

Reported-by: syzbot+c6167ec3de7def23d1e8@syzkaller.appspotmail.com
Cc: Arvid Brodin <arvid.brodin@alten.se>
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
2019-07-03 17:21:13 -07:00
committed by David S. Miller
parent 619afef01f
commit b9a1e62740
5 changed files with 25 additions and 10 deletions
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3
net/hsr/hsr_framereg.h
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@@ -12,7 +12,8 @@
struct hsr_node;
void hsr_del_node(struct list_head *self_node_db);
void hsr_del_self_node(struct list_head *self_node_db);
void hsr_del_nodes(struct list_head *node_db);
struct hsr_node *hsr_add_node(struct list_head *node_db, unsigned char addr[],
u16 seq_out);
struct hsr_node *hsr_get_node(struct hsr_port *port, struct sk_buff *skb,