linux-kernel - Re: [PATCH] wireless: wext: terminate ifr name coming from userspace

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Message-Id: <20170719.133350.2148731138543152927.davem@davemloft.net>
Date:   Wed, 19 Jul 2017 13:33:50 -0700 (PDT)
From:   David Miller <davem@...emloft.net>
To:     alexander.levin@...izon.com
Cc:     johannes.berg@...el.com, netdev@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH] wireless: wext: terminate ifr name coming from
 userspace

From: "Levin, Alexander (Sasha Levin)" <alexander.levin@...izon.com>
Date: Tue, 18 Jul 2017 04:23:16 +0000

> ifr name is assumed to be a valid string by the kernel, but nothing
> was forcing username to pass a valid string.
> 
> In turn, this would cause panics as we tried to access the string
> past it's valid memory.
> 
> Signed-off-by: Sasha Levin <alexander.levin@...izon.com>

Applied and queued up for -stable.

dev_ifname() has the same bug, I'll post a patch for that.