netdev - Re: [patch v4 1/2] netlink: add reference of module in netlink_dump

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Date:	Sun, 07 Oct 2012 00:31:17 -0400 (EDT)
From:	David Miller <davem@...emloft.net>
To:	gaofeng@...fujitsu.com
Cc:	eric.dumazet@...il.com, steffen.klassert@...unet.com,
	pablo@...filter.org, netdev@...r.kernel.org,
	linux-rdma@...r.kernel.org, stephen.hemminger@...tta.com,
	jengelh@...i.de
Subject: Re: [patch v4 1/2] netlink: add reference of module in
 netlink_dump_start

From: Gao feng <gaofeng@...fujitsu.com>
Date: Fri, 5 Oct 2012 14:15:48 +0800

> I get a panic when I use ss -a and rmmod inet_diag at the
> same time.
> 
> it's because netlink_dump use inet_diag_dump witch function
> belongs to module inet_diag.
> 
> I search the codes and find many modules have the same problem.
> We need add reference of the module which the cb->dump belongs
> to.
> 
> Thanks for all help from Stephen,Jan,Eric,Steffen and Pablo.
> 
> Change From v3:
> change netlink_dump_start to inline,suggestion from Pablo and
> Eric.
> 
> Change From v2:
> delete netlink_dump_done,and call module_put in netlink_dump
> and netlink_sock_destruct.
> 
> Signed-off-by: Gao feng <gaofeng@...fujitsu.com>

Applied.
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