linux-kernel - Re: [PATCH] mwifiex: printk() overflow with 32-byte SSIDs

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Message-ID: <20161109222216.GA3818@google.com>
Date:   Wed, 9 Nov 2016 14:22:17 -0800
From:   Brian Norris <briannorris@...omium.org>
To:     Kalle Valo <kvalo@...eaurora.org>
Cc:     Amitkumar Karwar <akarwar@...vell.com>,
        Nishant Sarmukadam <nishants@...vell.com>,
        linux-kernel@...r.kernel.org, linux-wireless@...r.kernel.org,
        Cathy Luo <cluo@...vell.com>, security@...nel.org,
        stable@...r.kernel.org
Subject: Re: [PATCH] mwifiex: printk() overflow with 32-byte SSIDs

On Thu, Nov 10, 2016 at 12:20:53AM +0200, Kalle Valo wrote:
> Brian Norris <briannorris@...omium.org> writes:
> 
> > SSIDs aren't guaranteed to be 0-terminated. Let's cap the max length
> > when we print them out.
> >
> > This can be easily noticed by connecting to a network with a 32-octet
> > SSID:
> >
> > [ 3903.502925] mwifiex_pcie 0000:01:00.0: info: trying to associate to
> > '0123456789abcdef0123456789abcdef <uninitialized mem>' bssid
> > xx:xx:xx:xx:xx:xx
> >
> > Fixes: 5e6e3a92b9a4 ("wireless: mwifiex: initial commit for Marvell mwifiex driver")
> > Signed-off-by: Brian Norris <briannorris@...omium.org>
> > Cc: <stable@...r.kernel.org>
> 
> I'm planning to push this to 4.9 if no objections.

SGTM. Thanks.