netdev - Re: [PATCH net v2] ipv6: the entire IPv6 header chain must fit the first fragment

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Message-ID: <0c9d0c7e-5cea-5ef4-6cbe-9c87e667123d@gmail.com>
Date:   Fri, 23 Mar 2018 07:04:47 -0700
From:   Eric Dumazet <eric.dumazet@...il.com>
To:     Paolo Abeni <pabeni@...hat.com>, netdev@...r.kernel.org
Cc:     "David S. Miller" <davem@...emloft.net>,
        David Ahern <dsahern@...il.com>,
        syzbot <syzbot+91e6f9932ff122fa4410@...kaller.appspotmail.com>,
        syzkaller-bugs@...glegroups.com
Subject: Re: [PATCH net v2] ipv6: the entire IPv6 header chain must fit the
 first fragment



On 03/23/2018 06:47 AM, Paolo Abeni wrote:
> While building ipv6 datagram we currently allow arbitrary large
> extheaders, even beyond pmtu size. The syzbot has found a way
> to exploit the above to trigger the following splat:
> 
> Fixes: 1da177e4c3f4 ("Linux-2.6.12-rc2")
> Reported-by: syzbot+91e6f9932ff122fa4410@...kaller.appspotmail.com
> Signed-off-by: Paolo Abeni <pabeni@...hat.com>
> 

Reviewed-by: Eric Dumazet <edumazet@...gle.com>

Thanks Paolo !