linux-kernel - Re: [PATCH v2] drivers/net/eql.c: prevent reading uninitialized stack memory

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Message-Id: <20100916.215541.257507783.davem@davemloft.net>
Date:	Thu, 16 Sep 2010 21:55:41 -0700 (PDT)
From:	David Miller <davem@...emloft.net>
To:	drosenberg@...curity.com
Cc:	linux-kernel@...r.kernel.org, netdev@...r.kernel.org,
	security@...nel.org, stable@...nel.org
Subject: Re: [PATCH v2] drivers/net/eql.c: prevent reading uninitialized
 stack memory

From: Dan Rosenberg <drosenberg@...curity.com>
Date: Wed, 15 Sep 2010 17:43:04 -0400

> Fixed formatting (tabs and line breaks).
> 
> The EQL_GETMASTRCFG device ioctl allows unprivileged users to read 16
> bytes of uninitialized stack memory, because the "master_name" member of
> the master_config_t struct declared on the stack in eql_g_master_cfg()
> is not altered or zeroed before being copied back to the user.  This
> patch takes care of it.
> 
> Signed-off-by: Dan Rosenberg <dan.j.rosenberg@...il.com>

Applied.
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