netdev - Re: [PATCH 2/2] IP_GRE: Linearize skb before csum.

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]

Message-ID: <1358903293.12374.492.camel@edumazet-glaptop>
Date:	Tue, 22 Jan 2013 17:08:13 -0800
From:	Eric Dumazet <eric.dumazet@...il.com>
To:	David Miller <davem@...emloft.net>
Cc:	jesse@...ira.com, pshelar@...ira.com, netdev@...r.kernel.org
Subject: Re: [PATCH 2/2] IP_GRE: Linearize skb before csum.

On Tue, 2013-01-22 at 19:41 -0500, David Miller wrote:

> We don't emit crap onto the wire knowingly.  Jesse is right.
> 
> If you want to do software GSO in situations where we know that the
> paged data cannot be modified asynchronously, you'll have to
> explicitly support that.
> 
> I will not accept us saying that allowing the emission of bad
> checksums is OK.  It never is.  That's terrible behavior, and creates
> impossible to disagnose problems.

How is this related to GRE only ?

We have dozen of skb_checksum_help() calls that basically have the same
issue.

Am I missing some obvious thing ?

--
To unsubscribe from this list: send the line "unsubscribe netdev" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html