netdev - Re: Off-by-one error in net/8021q/vlan.c

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Message-ID: <4D5BF411.4020204@ka9q.net>
Date:	Wed, 16 Feb 2011 07:58:09 -0800
From:	Phil Karn <karn@...q.net>
To:	richard -rw- weinberger <richard.weinberger@...il.com>
CC:	kaber@...sh.net, netdev@...r.kernel.org
Subject: Re: Off-by-one error in net/8021q/vlan.c

On 2/16/11 4:51 AM, richard -rw- weinberger wrote:
> On Wed, Feb 16, 2011 at 11:58 AM, Phil Karn <karn@...q.net> wrote:
>> The range check on vlan_id in register_vlan_device is off by one, and it
>> prevents the creation of a vlan interface for vlan ID 4095. (OSX allows
>> this, I checked.)
> 
> Then OSX should fix their code. 4095 is reserved.
> 

If it's reserved, then it's up to the user to reserve it.

I actually had reason to use this to fix a misconfigured host that was
using vlan 4095. This got in my way.
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