linux-kernel - Re: [PATCHv2 net] i40e: Implement ndo_gso

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Date:	Mon, 1 Dec 2014 15:35:01 -0800
From:	Joe Stringer <joestringer@...ira.com>
To:	Jesse Gross <jesse@...ira.com>
Cc:	netdev <netdev@...r.kernel.org>,
	Shannon Nelson <shannon.nelson@...el.com>,
	"Brandeburg, Jesse" <jesse.brandeburg@...el.com>,
	Jeff Kirsher <jeffrey.t.kirsher@...el.com>,
	Tom Herbert <therbert@...gle.com>,
	"linux.nics" <linux.nics@...el.com>,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>
Subject: Re: [PATCHv2 net] i40e: Implement ndo_gso_check()

On 21 November 2014 at 09:59, Joe Stringer <joestringer@...ira.com> wrote:
> On 20 November 2014 16:19, Jesse Gross <jesse@...ira.com> wrote:
>> I don't know if we need to have the check at all for IPIP though -
>> after all the driver doesn't expose support for it all (actually it
>> doesn't expose GRE either). This raises kind of an interesting
>> question about the checks though - it's pretty easy to add support to
>> the driver for a new GSO type (and I imagine that people will be
>> adding GRE soon) and forget to update the check.
>
> If the check is more conservative, then testing would show that it's
> not working and lead people to figure out why (and update the check).

More concretely, one suggestion would be something like following at
the start of each gso_check():

+       const int supported = SKB_GSO_TCPV4 | SKB_GSO_TCPV6 | SKB_GSO_FCOE |
+                             SKB_GSO_UDP | SKB_GSO_UDP_TUNNEL;
+
+       if (skb_shinfo(skb)->gso_type & ~supported)
+               return false;

..followed by checking the specifics for each. So far the patches have
only been concerned with further checking on UDP tunnels.
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/