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Date: Mon, 12 Oct 2020 18:46:47 -0700 From: Xie He <xie.he.0141@...il.com> To: Cong Wang <xiyou.wangcong@...il.com> Cc: Linux Kernel Network Developers <netdev@...r.kernel.org>, syzbot <syzbot+4a2c52677a8a1aa283cb@...kaller.appspotmail.com>, William Tu <u9012063@...il.com>, Willem de Bruijn <willemb@...gle.com> Subject: Re: [Patch net v3] ip_gre: set dev->hard_header_len and dev->needed_headroom properly On Mon, Oct 12, 2020 at 4:17 PM Cong Wang <xiyou.wangcong@...il.com> wrote: > > Note, there are some other suspicious use of dev->hard_header_len in > the same file, but let's leave them to a separate patch if really > needed. I looked at the file (before this patch). There are 4 occurrences of hard_header_len, but they are all for ERSPAN devices (TAP devices which tunnel Ethernet frames). So I think they are used for the Ethernet header length and we don't need to worry about them.
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