netdev - Re: [PATCH] [PATCH net v2] ipv6: remove min MTU check for ipsec tunnels

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Date:   Fri, 11 May 2018 12:02:45 +0300
From:   Sergei Shtylyov <sergei.shtylyov@...entembedded.com>
To:     Ashwanth Goli <ashwanth@...eaurora.org>, netdev@...r.kernel.org,
        davem@...emloft.net
Cc:     pabeni@...hat.com, dsahern@...il.com, eric.dumazet@...il.com
Subject: Re: [PATCH] [PATCH net v2] ipv6: remove min MTU check for ipsec
 tunnels

Hello!

On 5/10/2018 8:19 PM, Ashwanth Goli wrote:

> With 749439bfac "fix udpv6 sendmsg crash caused by too small MTU"

    When you cite a comnmit, you must specify at least 12-digit SHA1 and 
enclose the summary in (""), not just "".

> ipsec tunnels that report a MTU less than IPV6_MIN_MTU are broken
> even for packets that are smaller than IPV6_MIN_MTU.
> 
> According to rfc2473#section-7.1
> 
>      if the original IPv6 packet is equal or  smaller  than  the
>      IPv6 minimum link MTU, the tunnel entry-point node
>      encapsulates the original packet, and subsequently
>      fragments the resulting IPv6 tunnel packet into IPv6
>      fragments that do not exceed the Path MTU to the tunnel
>      exit-point.
> 
> Dropping the MTU check for ipsec tunnel destinations.
> 
> Signed-off-by: Ashwanth Goli <ashwanth@...eaurora.org>
[...]

MBR, Sergei