Re: [PATCH v4] tipc: fix modprobe tipc failed after switch order of device registration

[David Miller]

From: hujunwei <hujunwei4@xxxxxxxxxx>
Date: Mon, 20 May 2019 14:43:59 +0800

> From: Junwei Hu <hujunwei4@xxxxxxxxxx>
> 
> 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 7e27e8d6130c
> ("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: 7e27e8d6130c ("tipc: switch order of device registration to fix a crash")
> Signed-off-by: Junwei Hu <hujunwei4@xxxxxxxxxx>
> Reported-by: Wang Wang <wangwang2@xxxxxxxxxx>
> Reported-by: syzbot+1e8114b61079bfe9cbc5@xxxxxxxxxxxxxxxxxxxxxxxxx
> Reviewed-by: Kang Zhou <zhoukang7@xxxxxxxxxx>
> Reviewed-by: Suanming Mou <mousuanming@xxxxxxxxxx>

Applied.