linux-kernel - Re: [PATCH] net: vmxnet3: fix possible buffer overflow caused by bad DMA value in vmxnet3_get

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Date:   Mon, 01 Jun 2020 11:53:14 -0700 (PDT)
From:   David Miller <davem@...emloft.net>
To:     baijiaju1990@...il.com
Cc:     doshir@...are.com, pv-drivers@...are.com, kuba@...nel.org,
        netdev@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] net: vmxnet3: fix possible buffer overflow caused by
 bad DMA value in vmxnet3_get_rss()

From: Jia-Ju Bai <baijiaju1990@...il.com>
Date: Sat, 30 May 2020 10:41:50 +0800

> The value adapter->rss_conf is stored in DMA memory, and it is assigned
> to rssConf, so rssConf->indTableSize can be modified at anytime by
> malicious hardware. Because rssConf->indTableSize is assigned to n,
> buffer overflow may occur when the code "rssConf->indTable[n]" is
> executed.
> 
> To fix this possible bug, n is checked after being used.
> 
> Signed-off-by: Jia-Ju Bai <baijiaju1990@...il.com>

Applied, thanks.