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tipc: fix modprobe tipc failed after switch order of device registration

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Error message printed:
modprobe: ERROR: could not insert 'tipc': Address family not
supported by protocol.
when modprobe tipc after the following patch: switch order of
device registration, commit 7e27e8d613
("tipc: switch order of device registration to fix a crash")

Because sock_create_kern(net, AF_TIPC, ...) called by
tipc_topsrv_create_listener() in the initialization process
of tipc_init_net(), so tipc_socket_init() must be execute before that.
Meanwhile, tipc_net_id need to be initialized when sock_create()
called, and tipc_socket_init() is no need to be called for each namespace.

I add a variable tipc_topsrv_net_ops, and split the
register_pernet_subsys() of tipc into two parts, and split
tipc_socket_init() with initialization of pernet params.

By the way, I fixed resources rollback error when tipc_bcast_init()
failed in tipc_init_net().

Fixes: 7e27e8d613 ("tipc: switch order of device registration to fix a crash")
Signed-off-by: Junwei Hu <hujunwei4@huawei.com>
Reported-by: Wang Wang <wangwang2@huawei.com>
Reported-by: syzbot+1e8114b61079bfe9cbc5@syzkaller.appspotmail.com
Reviewed-by: Kang Zhou <zhoukang7@huawei.com>
Reviewed-by: Suanming Mou <mousuanming@huawei.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Junwei Hu 2019-05-20 14:43:59 +08:00 • committed by David S. Miller
parent f49aa1de98
commit 526f5b851a
3 changed files with 27 additions and 10 deletions
Download patch file Download diff file Expand all files Collapse all files

14
net/tipc/topsrv.c
View file

@ -635,7 +635,7 @@ static void tipc_topsrv_work_stop(struct tipc_topsrv *s)
destroy_workqueue(s->send_wq);
}
int tipc_topsrv_start(struct net *net)
static int tipc_topsrv_start(struct net *net)
{
struct tipc_net *tn = tipc_net(net);
const char name[] = "topology_server";
@ -668,7 +668,7 @@ int tipc_topsrv_start(struct net *net)
return ret;
}
void tipc_topsrv_stop(struct net *net)
static void tipc_topsrv_stop(struct net *net)
{
struct tipc_topsrv *srv = tipc_topsrv(net);
struct socket *lsock = srv->listener;
@ -693,3 +693,13 @@ void tipc_topsrv_stop(struct net *net)
idr_destroy(&srv->conn_idr);
kfree(srv);
}
int __net_init tipc_topsrv_init_net(struct net *net)
{
return tipc_topsrv_start(net);
}
void __net_exit tipc_topsrv_exit_net(struct net *net)
{
tipc_topsrv_stop(net);
}