linux-kernel - Re: [PATCH] net/9p: Mount only matching virtio channels

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Message-Id: <20100927.155414.43043854.davem@davemloft.net>
Date:	Mon, 27 Sep 2010 15:54:14 -0700 (PDT)
From:	David Miller <davem@...emloft.net>
To:	sven.eckelmann@....de
Cc:	ericvh@...il.com, netdev@...r.kernel.org,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH] net/9p: Mount only matching virtio channels

From: Sven Eckelmann <sven.eckelmann@....de>
Date: Sun, 26 Sep 2010 17:28:13 +0200

> p9_virtio_create will only compare the the channel's tag characters
> against the device name till the end of the channel's tag but not till
> the end of the device name. This means that if a user defines channels
> with the tags foo and foobar then he would mount foo when he requested
> foonot and may mount foo when he requested foobar.
> 
> Thus it is necessary to check both string lengths against each other in
> case of a successful partial string match.
> 
> Signed-off-by: Sven Eckelmann <sven.eckelmann@....de>

I'll apply this, but this code would be so much simpler and this bug
would have never happened if these tags were NULL terminated when they
were pulled in from virtio.
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