netdev - Re: [PATCH 1/2 net] NFC: nci: Add some bounds checking in nci_hci_cmd

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Message-Id: <20190406.150433.1815979462207649083.davem@davemloft.net>
Date:   Sat, 06 Apr 2019 15:04:33 -0700 (PDT)
From:   David Miller <davem@...emloft.net>
To:     dan.carpenter@...cle.com
Cc:     sameo@...ux.intel.com, christophe.ricard@...il.com,
        linux-wireless@...r.kernel.org, kernel-janitors@...r.kernel.org,
        netdev@...r.kernel.org, surenb@...gle.com
Subject: Re: [PATCH 1/2 net] NFC: nci: Add some bounds checking in
 nci_hci_cmd_received()

From: Dan Carpenter <dan.carpenter@...cle.com>
Date: Wed, 3 Apr 2019 10:12:48 +0300

> This is similar to commit 674d9de02aa7 ("NFC: Fix possible memory
> corruption when handling SHDLC I-Frame commands").
> 
> I'm not totally sure, but I think that commit description may have
> overstated the danger.  I was under the impression that this data came
> from the firmware?  If you can't trust your networking firmware, then
> you're already in trouble.
> 
> Anyway, these days we add bounds checking where ever we can and we call
> it kernel hardening.  Better safe than sorry.
> 
> Fixes: 11f54f228643 ("NFC: nci: Add HCI over NCI protocol support")
> Signed-off-by: Dan Carpenter <dan.carpenter@...cle.com>

Applied.