netdev - Re: [patch -next] qlcnic: underflow in qlcnic_validate_max_tx

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Date:	Thu, 29 Aug 2013 01:24:46 -0400 (EDT)
From:	David Miller <davem@...emloft.net>
To:	dan.carpenter@...cle.com
Cc:	himanshu.madhani@...gic.com, rajesh.borundia@...gic.com,
	shahed.shaikh@...gic.com, jitendra.kalsaria@...gic.com,
	sony.chacko@...gic.com, sucheta.chakraborty@...gic.com,
	linux-driver@...gic.com, netdev@...r.kernel.org,
	kernel-janitors@...r.kernel.org
Subject: Re: [patch -next] qlcnic: underflow in
 qlcnic_validate_max_tx_rings()

From: Dan Carpenter <dan.carpenter@...cle.com>
Date: Tue, 27 Aug 2013 04:16:22 +0300

> This function checks the upper bound but it doesn't check for negative
> numbers:
> 
> 	if (txq > QLCNIC_MAX_TX_RINGS) {
> 
> I've solved this by making "txq" a u32 type.  I chose that because
> ->tx_count in the ethtool_channels struct is a __u32.
> 
> This bug was added in aa4a1f7df7 ('qlcnic: Enable Tx queue changes using
> ethtool for 82xx Series adapter.').
> 
> Signed-off-by: Dan Carpenter <dan.carpenter@...cle.com>

Applied, thanks.
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