From: David Miller <davem@davemloft.net>
To: edumazet@google.com
Cc: netdev@vger.kernel.org, eric.dumazet@gmail.com,
syzkaller@googlegroups.com
Subject: Re: [PATCH net] net: rtnetlink: validate IFLA_MTU attribute in rtnl_create_link()
Date: Thu, 23 Jan 2020 11:16:01 +0100 (CET) [thread overview]
Message-ID: <20200123.111601.254361683807540052.davem@davemloft.net> (raw)
In-Reply-To: <20200122064729.117730-1-edumazet@google.com>
From: Eric Dumazet <edumazet@google.com>
Date: Tue, 21 Jan 2020 22:47:29 -0800
> rtnl_create_link() needs to apply dev->min_mtu and dev->max_mtu
> checks that we apply in do_setlink()
>
> Otherwise malicious users can crash the kernel, for example after
> an integer overflow :
...
> Fixes: 61e84623ace3 ("net: centralize net_device min/max MTU checking")
> Signed-off-by: Eric Dumazet <edumazet@google.com>
> Reported-by: syzbot <syzkaller@googlegroups.com>
Applied and queued up for -stable, thanks Eric.
prev parent reply other threads:[~2020-01-23 10:16 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-01-22 6:47 [PATCH net] net: rtnetlink: validate IFLA_MTU attribute in rtnl_create_link() Eric Dumazet
2020-01-23 10:16 ` David Miller [this message]
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