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Date:   Thu, 27 Aug 2020 09:08:47 +0200
From:   Steffen Klassert <>
To:     Sabrina Dubroca <>
CC:     <>, Xiumei Mu <>
Subject: Re: [PATCH ipsec] xfrmi: drop ignore_df check before updating pmtu

On Tue, Aug 04, 2020 at 11:37:29AM +0200, Sabrina Dubroca wrote:
> xfrm interfaces currently test for !skb->ignore_df when deciding
> whether to update the pmtu on the skb's dst. Because of this, no pmtu
> exception is created when we do something like:
>     ping -s 1438 <dest>
> By dropping this check, the pmtu exception will be created and the
> next ping attempt will work.
> Fixes: f203b76d7809 ("xfrm: Add virtual xfrm interfaces")
> Reported-by: Xiumei Mu <>
> Signed-off-by: Sabrina Dubroca <>

Patch applied, thanks Sabrina!

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