netdev - Re: [PATCH net] ipv4: fix buffer overflow in ip_options

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Message-Id: <20140721.201726.119337265768368434.davem@davemloft.net>
Date:	Mon, 21 Jul 2014 20:17:26 -0700 (PDT)
From:	David Miller <davem@...emloft.net>
To:	eric.dumazet@...il.com
Cc:	netdev@...r.kernel.org
Subject: Re: [PATCH net] ipv4: fix buffer overflow in ip_options_compile()

From: Eric Dumazet <eric.dumazet@...il.com>
Date: Mon, 21 Jul 2014 07:17:42 +0200

> From: Eric Dumazet <edumazet@...gle.com>
> 
> There is a benign buffer overflow in ip_options_compile spotted by
> AddressSanitizer[1] :
> 
> Its benign because we always can access one extra byte in skb->head
> (because header is followed by struct skb_shared_info), and in this case
> this byte is not even used.
 ...
> [1] https://code.google.com/p/address-sanitizer/wiki/AddressSanitizerForKernel
> 
> Signed-off-by: Eric Dumazet <edumazet@...gle.com>

Right, should be benign, but I will queue it up to -stable anyways
just to be safe.

Applied, thanks a lot Eric.
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