linux-kernel - Re: [PATCH] i825xx: fix paging fault on znet

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Message-Id: <20120904.151306.1766477429185359707.davem@davemloft.net>
Date:	Tue, 04 Sep 2012 15:13:06 -0400 (EDT)
From:	David Miller <davem@...emloft.net>
To:	fengguang.wu@...el.com
Cc:	jeffrey.t.kirsher@...el.com, netdev@...r.kernel.org,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH] i825xx: fix paging fault on znet_probe()

From: Fengguang Wu <fengguang.wu@...el.com>
Date: Sun, 2 Sep 2012 15:25:46 +0800

> In znet_probe(), strncmp() may access beyond 0x100000 and
> trigger the below oops in kvm.  Fix it by limiting the loop
> under 0x100000-8. I suspect the limit could be further decreased
> to 0x100000-sizeof(struct netidblk), however no datasheet at hand..
 ...
> Signed-off-by: Fengguang Wu <fengguang.wu@...el.com>

This also makes the code actually match the description in the comment
above the loop :-)

Applied, thanks.
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