Re: [Xen-devel] xennet_start_xmit assumptions

[Sowmini Varadhan <sowmini.varadhan@xxxxxxxxxx>]

On (01/19/17 13:47), Sowmini Varadhan wrote:
> > Specifically I'm talking about the dev_validate_header() check.
> > That is supposed to protect us from these kinds of situations.
> 
> ah, but I run my pf_packet application as root, so I have 
> capable(CAP_SYS_RAWIO), so I slip through the dev_validate_header()
> check.

and in that light, should dev_validate_header()
always return false if len == 0?

that will take care of all the send paths in af_packet.c
but it impacts all drivers as well (even though it is the
logically correct thing to do..)

--Sowmini


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