netdev - Re: [PATCH net] net: ip_gre: Accept IFLA_INFO

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Message-Id: <20200316.172141.2249000423302633470.davem@davemloft.net>
Date:   Mon, 16 Mar 2020 17:21:41 -0700 (PDT)
From:   David Miller <davem@...emloft.net>
To:     petrm@...lanox.com
Cc:     netdev@...r.kernel.org, u9012063@...il.com, lucien.xin@...il.com,
        kuznet@....inr.ac.ru, syzkaller-bugs@...glegroups.com,
        yoshfuji@...ux-ipv6.org,
        syzbot+1b4ebf4dae4e510dd219@...kaller.appspotmail.com
Subject: Re: [PATCH net] net: ip_gre: Accept IFLA_INFO_DATA-less
 configuration

From: Petr Machata <petrm@...lanox.com>
Date: Mon, 16 Mar 2020 19:53:00 +0200

> The fix referenced below causes a crash when an ERSPAN tunnel is created
> without passing IFLA_INFO_DATA. Fix by validating passed-in data in the
> same way as ipgre does.
> 
> Fixes: e1f8f78ffe98 ("net: ip_gre: Separate ERSPAN newlink / changelink callbacks")
> Reported-by: syzbot+1b4ebf4dae4e510dd219@...kaller.appspotmail.com
> Signed-off-by: Petr Machata <petrm@...lanox.com>

Applied and queued up for -stable, thanks.