netdev - Re: [PATCH net] ipv6: avoid overflow of offset in ip6_find

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Message-Id: <20170719.225051.645203803095342.davem@davemloft.net>
Date:   Wed, 19 Jul 2017 22:50:51 -0700 (PDT)
From:   David Miller <davem@...emloft.net>
To:     sd@...asysnail.net
Cc:     netdev@...r.kernel.org, hannes@...essinduktion.org
Subject: Re: [PATCH net] ipv6: avoid overflow of offset in
 ip6_find_1stfragopt

From: Sabrina Dubroca <sd@...asysnail.net>
Date: Wed, 19 Jul 2017 22:28:55 +0200

> In some cases, offset can overflow and can cause an infinite loop in
> ip6_find_1stfragopt(). Make it unsigned int to prevent the overflow, and
> cap it at IPV6_MAXPLEN, since packets larger than that should be invalid.
> 
> This problem has been here since before the beginning of git history.
> 
> Signed-off-by: Sabrina Dubroca <sd@...asysnail.net>
> Acked-by: Hannes Frederic Sowa <hannes@...essinduktion.org>

Applied and queued up for -stable, thanks.