linux-kernel - Re: [PATCH 1/2] ip_vti: fix a null pointer deferrence when create vti fallback tunnel

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Message-Id: <20180819.112753.320024709787799108.davem@davemloft.net>
Date:   Sun, 19 Aug 2018 11:27:53 -0700 (PDT)
From:   David Miller <davem@...emloft.net>
To:     yanhaishuang@...s.chinamobile.com
Cc:     steffen.klassert@...unet.com, kuznet@....inr.ac.ru,
        netdev@...r.kernel.org, linux-kernel@...r.kernel.org,
        edumazet@...gle.com
Subject: Re: [PATCH 1/2] ip_vti: fix a null pointer deferrence when create
 vti fallback tunnel

From: Haishuang Yan <yanhaishuang@...s.chinamobile.com>
Date: Sun, 19 Aug 2018 15:05:04 +0800

> After set fb_tunnels_only_for_init_net to 1, the itn->fb_tunnel_dev will
> be NULL and will cause following crash:
 ...
> Reproduce:
> echo 1 > /proc/sys/net/core/fb_tunnels_only_for_init_net
> modprobe ip_vti
> unshare -n
> 
> Fixes: 79134e6ce2c9 (net: do not create fallback tunnels for non-default
> namespaces)
> Cc: Eric Dumazet <edumazet@...gle.com>
> Signed-off-by: Haishuang Yan <yanhaishuang@...s.chinamobile.com>

Applied, but please format your Fixes: tag properly next time.

Do not split up a Fixes tag into multiple lines, no matter how long it
is.  And enclose the commit header text in both parenthesis and double
quotes, not just parenthesis.  Like ("blah blah blah"), thank you.