netdev - Re: [PATCH net] net: do not allow gso_size to be set to GSO_BY

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Message-ID: <ZNzjKM1F+a6PVRSr@t14s.localdomain>
Date: Wed, 16 Aug 2023 11:54:32 -0300
From: Marcelo Ricardo Leitner <marcelo.leitner@...il.com>
To: Eric Dumazet <edumazet@...gle.com>
Cc: "David S . Miller" <davem@...emloft.net>,
	Jakub Kicinski <kuba@...nel.org>, Paolo Abeni <pabeni@...hat.com>,
	netdev@...r.kernel.org, eric.dumazet@...il.com,
	syzbot <syzkaller@...glegroups.com>,
	Xin Long <lucien.xin@...il.com>,
	Willem de Bruijn <willemb@...gle.com>,
	"Michael S. Tsirkin" <mst@...hat.com>,
	Jason Wang <jasowang@...hat.com>,
	Xuan Zhuo <xuanzhuo@...ux.alibaba.com>
Subject: Re: [PATCH net] net: do not allow gso_size to be set to GSO_BY_FRAGS

On Wed, Aug 16, 2023 at 02:21:58PM +0000, Eric Dumazet wrote:
> One missing check in virtio_net_hdr_to_skb() allowed
> syzbot to crash kernels again [1]
> 
> Do not allow gso_size to be set to GSO_BY_FRAGS (0xffff),
> because this magic value is used by the kernel.

Reviewed-by: Marcelo Ricardo Leitner <marcelo.leitner@...il.com>