Re: [PATCH net-next v13 11/12] virtio_net: Add support for TCP and UDP ethtool rules

[Simon Horman <horms@kernel.org>]

+ Chris

On Wed, Dec 03, 2025 at 08:33:53AM -0500, Michael S. Tsirkin wrote:
> On Tue, Dec 02, 2025 at 03:55:39PM +0000, Simon Horman wrote:
> > On Wed, Nov 26, 2025 at 01:35:38PM -0600, Daniel Jurgens wrote:
> > 
> > ...
> > 
> > > @@ -6005,6 +6085,11 @@ static void parse_ip4(struct iphdr *mask, struct iphdr *key,
> > >  		mask->tos = l3_mask->tos;
> > >  		key->tos = l3_val->tos;
> > >  	}
> > > +
> > > +	if (l3_mask->proto) {
> > > +		mask->protocol = l3_mask->proto;
> > > +		key->protocol = l3_val->proto;
> > > +	}
> > >  }
> > 
> > Hi Daniel,
> > 
> > Claude Code with review-prompts flags an issue here,
> > which I can't convince myself is not the case.
> > 
> > If parse_ip4() is called for a IP_USER_FLOW, which use ethtool_usrip4_spec,
> > as does this function, then all is well.
> > 
> > However, it seems that it may also be called for TCP_V4_FLOW and UDP_V4_FLOW
> > flows, in which case accessing .proto will overrun the mask and key which
> > are actually struct ethtool_tcpip4_spec.
> > 
> > https://netdev-ai.bots.linux.dev/ai-review.html?id=51d97b85-5ca3-4cb8-a96a-0d6eab5e7196#patch-10
> 
> 
> Oh I didn't know about this one. Is there any data on how does it work?
> Which model/prompt/etc?

Hi Michael,

I believe these prompts are used:

https://github.com/masoncl/review-prompts/

...