netdev - Re: [PATCHv3 ipsec-next] xfrm: Do not parse 32bits compiled xfrm netlink msg on 64bits host

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: <20150127110413.GF1373@breakpoint.cc>
Date:	Tue, 27 Jan 2015 12:04:13 +0100
From:	Florian Westphal <fw@...len.de>
To:	David Laight <David.Laight@...LAB.COM>
Cc:	'Fan Du' <fan.du@...el.com>,
	"steffen.klassert@...unet.com" <steffen.klassert@...unet.com>,
	"herbert@...dor.apana.org.au" <herbert@...dor.apana.org.au>,
	"davem@...emloft.net" <davem@...emloft.net>,
	"netdev@...r.kernel.org" <netdev@...r.kernel.org>,
	"fengyuleidian0615@...il.com" <fengyuleidian0615@...il.com>
Subject: Re: [PATCHv3 ipsec-next] xfrm: Do not parse 32bits compiled xfrm
 netlink msg on 64bits host

David Laight <David.Laight@...LAB.COM> wrote:
> From: Fan Du
> > structure like xfrm_usersa_info or xfrm_userpolicy_info
> > has different sizeof when compiled as 32bits and 64bits
> > due to not appending pack attribute in their definition.
> 
> Don't 'pack' the structure, just ensure that all the fields
> are fixed sized and on their natural boundary.

How do you propose to do this without breaking ABI?

> Possibly add a compile-time check that the structure is
> of the expected size.

Uh, what?
--
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