netdev - Re: [PATCH] net: Separate the close_list and the unreg

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Message-Id: <20131007.152238.779958484281422820.davem@davemloft.net>
Date:	Mon, 07 Oct 2013 15:22:38 -0400 (EDT)
From:	David Miller <davem@...emloft.net>
To:	ebiederm@...ssion.com
Cc:	fruggeri@...stanetworks.com, netdev@...r.kernel.org
Subject: Re: [PATCH] net: Separate the close_list and the unreg_list v2

From: ebiederm@...ssion.com (Eric W. Biederman)
Date: Sat, 05 Oct 2013 19:26:05 -0700

> 
> Separate the unreg_list and the close_list in dev_close_many preventing
> dev_close_many from permuting the unreg_list.  The permutations of the
> unreg_list have resulted in cases where the loopback device is accessed
> it has been freed in code such as dst_ifdown.  Resulting in subtle memory
> corruption.
> 
> This is the second bug from sharing the storage between the close_list
> and the unreg_list.  The issues that crop up with sharing are
> apparently too subtle to show up in normal testing or usage, so let's
> forget about being clever and use two separate lists.
> 
> v2: Make all callers pass in a close_list to dev_close_many
> 
> Signed-off-by: "Eric W. Biederman" <ebiederm@...ssion.com>
> ---
> 
> Sending the complete diff because this version is actually more
> readable and more obviously correct.

I'll apply this, thanks Eric.
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