netdev - Re: [PATCH net-next 0/2] Pack struct xfrm_usersa_info and struct xfrm_userpolicy

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 for Android: free password hash cracker in your pocket

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

Message-ID: <52CE5CB6.3030409@windriver.com>
Date:	Thu, 9 Jan 2014 16:24:22 +0800
From:	Fan Du <fan.du@...driver.com>
To:	David Miller <davem@...emloft.net>
CC:	<steffen.klassert@...unet.com>, <stephen@...workplumber.org>,
	<dev@...ts.strongswan.org>, <netdev@...r.kernel.org>
Subject: Re: [PATCH net-next 0/2] Pack struct xfrm_usersa_info and struct
 xfrm_userpolicy_info



On 2014年01月08日 02:07, David Miller wrote:
> From: Fan Du<fan.du@...driver.com>
> Date: Tue, 7 Jan 2014 14:48:57 +0800
>
>> >  When trying to setup IPsec configuration on a 64bits host with
>> >  iproute2(32bits compiled), the intened xfrm policy and sa is
>> >  either deficit or wrong when kernel trying to parse user land
>> >  information.
> You can't make this change without breaking userspace.
>
> We'll have to translate the data structures somehow with a compat
> layer like we have for 32/64 bit compatability for system calls.

Do you mean below code snippet?

compat_sys_sendmsg
   -> __sys_sendmsg
     -> ___sys_sendmsg
       -> get_compat_msghdr <- translate the structure here

It's a bit of late in the code flow to do the translation in
xfrm_user code, or I missed what you actually mean.

-- 
浮沉随浪只记今朝笑

--fan
--
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