From mboxrd@z Thu Jan  1 00:00:00 1970
From: David Miller <davem@davemloft.net>
Subject: Re: [PATCH net,v2] ip_tunnel: fix ipv4 pmtu check to honor inner
 ip header df
Date: Wed, 08 Jul 2015 16:03:33 -0700 (PDT)
Message-ID: <20150708.160333.436760090755596682.davem@davemloft.net>
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=46rom: Timo Ter=E4s <timo.teras@iki.fi>
Date: Tue,  7 Jul 2015 08:34:13 +0300

> Frag needed should be sent only if the inner header asked
> to not fragment. Currently fragmentation is broken if the
> tunnel has df set, but df was not asked in the original
> packet. The tunnel's df needs to be still checked to update
> internally the pmtu cache.
>=20
> Commit 23a3647bc4f93bac broke it, and this commit fixes
> the ipv4 df check back to the way it was.
>=20
> Fixes: 23a3647bc4f93bac ("ip_tunnels: Use skb-len to PMTU check.")
> Cc: Pravin B Shelar <pshelar@nicira.com>
> Signed-off-by: Timo Ter=E4s <timo.teras@iki.fi>

Applied and queued up for -stable, thanks.