netdev - Re: [PATCH 1/2 net] net: mvpp2: prevent buffer overflow in mvpp22_rss

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Message-Id: <20200506.141809.1664241067295315347.davem@davemloft.net>
Date:   Wed, 06 May 2020 14:18:09 -0700 (PDT)
From:   David Miller <davem@...emloft.net>
To:     dan.carpenter@...cle.com
Cc:     maxime.chevallier@...tlin.com, mcroce@...hat.com,
        rmk+kernel@...linux.org.uk, antoine.tenart@...tlin.com,
        ioana.ciornei@....com, netdev@...r.kernel.org,
        kernel-janitors@...r.kernel.org
Subject: Re: [PATCH 1/2 net] net: mvpp2: prevent buffer overflow in
 mvpp22_rss_ctx()

From: Dan Carpenter <dan.carpenter@...cle.com>
Date: Wed, 6 May 2020 13:16:22 +0300

> The "rss_context" variable comes from the user via  ethtool_get_rxfh().
> It can be any u32 value except zero.  Eventually it gets passed to
> mvpp22_rss_ctx() and if it is over MVPP22_N_RSS_TABLES (8) then it
> results in an array overflow.
> 
> Fixes: 895586d5dc32 ("net: mvpp2: cls: Use RSS contexts to handle RSS tables")
> Signed-off-by: Dan Carpenter <dan.carpenter@...cle.com>

Applied.