netdev - Re: [PATCH net] ipv4: remove BUG_ON() from fib_compute_spec

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Date:   Sat, 28 Jul 2018 19:07:02 -0700 (PDT)
From:   David Miller <davem@...emloft.net>
To:     lorenzo.bianconi@...hat.com
Cc:     netdev@...r.kernel.org
Subject: Re: [PATCH net] ipv4: remove BUG_ON() from fib_compute_spec_dst

From: Lorenzo Bianconi <lorenzo.bianconi@...hat.com>
Date: Fri, 27 Jul 2018 18:15:46 +0200

> Remove BUG_ON() from fib_compute_spec_dst routine and check
> in_dev pointer during flowi4 data structure initialization.
> fib_compute_spec_dst routine can be run concurrently with device removal
> where ip_ptr net_device pointer is set to NULL. This can happen
> if userspace enables pkt info on UDP rx socket and the device
> is removed while traffic is flowing
> 
> Fixes: 35ebf65e851c ("ipv4: Create and use fib_compute_spec_dst() helper")
> Signed-off-by: Lorenzo Bianconi <lorenzo.bianconi@...hat.com>

Applied and queued up for -stable, thank you.