netdev - Re: [PATCH net v2 1/1] ipvlan: NULL pointer dereference panic in ipvlan_port

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Date:   Sat, 18 Nov 2017 10:37:29 +0900 (KST)
From:   David Miller <davem@...emloft.net>
To:     girish.moodalbail@...cle.com
Cc:     netdev@...r.kernel.org, mahesh@...dewar.net
Subject: Re: [PATCH net v2 1/1] ipvlan: NULL pointer dereference panic in
 ipvlan_port_destroy

From: Girish Moodalbail <girish.moodalbail@...cle.com>
Date: Thu, 16 Nov 2017 23:16:17 -0800

> When call to register_netdevice() (called from ipvlan_link_new()) fails,
> we call ipvlan_uninit() (through ndo_uninit()) to destroy the ipvlan
> port. After returning unsuccessfully from register_netdevice() we go
> ahead and call ipvlan_port_destroy() again which causes NULL pointer
> dereference panic. Fix the issue by making ipvlan_init() and
> ipvlan_uninit() call symmetric.
> 
> The ipvlan port will now be created inside ipvlan_init() and will be
> destroyed in ipvlan_uninit().
> 
> Fixes: 2ad7bf363841 (ipvlan: Initial check-in of the IPVLAN driver)
> Signed-off-by: Girish Moodalbail <girish.moodalbail@...cle.com>

Applied.