netdev - Re: [PATCHv1 net-next 0/5] netlink: mmap: kernel panic and some issues

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Message-ID: <20150902222710.GA7746@gmail.com>
Date:	Thu, 3 Sep 2015 07:27:10 +0900
From:	Ken-ichirou MATSUZAWA <chamaken@...il.com>
To:	Daniel Borkmann <daniel@...earbox.net>
Cc:	David Miller <davem@...emloft.net>, netdev@...r.kernel.org,
	fw@...len.de
Subject: Re: [PATCHv1 net-next 0/5] netlink: mmap: kernel panic and some
 issues

On Wed, Sep 02, 2015 at 05:56:36PM +0200, Daniel Borkmann wrote:
> you suggest or not), for two reasons: I think (will start experimenting
> more with it tomorrow), you would get an out of bounds access here in
> case the skb->data is the last slot in the ring buffer and reaches
> exactly to the ring buffer end. And (despite that), it's also hard

I thought accessing as a value, not a pointer, in thats wrong shared
info will not be a big problem, but

> to maintain - the next one adding a new shared info member will very
> likely oversee this special case in netlink here, thus the issue would
> then simply be reintroduced over and over.

I agree with you.
Thank you for taking your time. I think I have learned a lot.

Thanks,
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