netdev - Re: [PATCH net] ipv6: rt6_check should return NULL if 'from' is NULL

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Message-Id: <20190717.152633.681021760422039901.davem@davemloft.net>
Date:   Wed, 17 Jul 2019 15:26:33 -0700 (PDT)
From:   David Miller <davem@...emloft.net>
To:     dsahern@...nel.org
Cc:     netdev@...r.kernel.org, linux-kernel@...lSD.com, dsahern@...il.com
Subject: Re: [PATCH net] ipv6: rt6_check should return NULL if 'from' is
 NULL

From: David Ahern <dsahern@...nel.org>
Date: Wed, 17 Jul 2019 15:08:43 -0700

> From: David Ahern <dsahern@...il.com>
> 
> Paul reported that l2tp sessions were broken after the commit referenced
> in the Fixes tag. Prior to this commit rt6_check returned NULL if the
> rt6_info 'from' was NULL - ie., the dst_entry was disconnected from a FIB
> entry. Restore that behavior.
> 
> Fixes: 93531c674315 ("net/ipv6: separate handling of FIB entries from dst based routes")
> Reported-by: Paul Donohue <linux-kernel@...lSD.com>
> Tested-by: Paul Donohue <linux-kernel@...lSD.com>
> Signed-off-by: David Ahern <dsahern@...il.com>

Applied and queued up for -stable, thanks.