netdev - Re: [PATCH net] net: Added pointer check for dst->ops->neigh_lookup in dst_neigh_lookup

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Date:   Tue, 07 Jul 2020 15:34:21 -0700 (PDT)
From:   David Miller <davem@...emloft.net>
To:     martinvarghesenokia@...il.com
Cc:     netdev@...r.kernel.org, martin.varghese@...ia.com
Subject: Re: [PATCH net] net: Added pointer check for
 dst->ops->neigh_lookup in dst_neigh_lookup_skb

From: Martin Varghese <martinvarghesenokia@...il.com>
Date: Sun,  5 Jul 2020 14:23:49 +0530

> From: Martin Varghese <martin.varghese@...ia.com>
> 
> The packets from tunnel devices (eg bareudp) may have only
> metadata in the dst pointer of skb. Hence a pointer check of
> neigh_lookup is needed in dst_neigh_lookup_skb
> 
> Kernel crashes when packets from bareudp device is processed in
> the kernel neighbour subsytem.
 ...
> Fixes: aaa0c23cb901 ("Fix dst_neigh_lookup/dst_neigh_lookup_skb return value handling bug")
> Signed-off-by: Martin Varghese <martin.varghese@...ia.com>

Applied and queued up for -stable, thanks.