netdev - Re: [PATCH net-next 0/7] Allow to monitor multicast cache event via rtnetlink

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: <20121205.125326.1946963285042434825.davem@davemloft.net>
Date:	Wed, 05 Dec 2012 12:53:26 -0500 (EST)
From:	David Miller <davem@...emloft.net>
To:	nicolas.dichtel@...nd.com
Cc:	netdev@...r.kernel.org
Subject: Re: [PATCH net-next 0/7] Allow to monitor multicast cache event
 via rtnetlink

From: Nicolas Dichtel <nicolas.dichtel@...nd.com>
Date: Wed, 05 Dec 2012 12:02:50 +0100

> Le 04/12/2012 21:02, Nicolas Dichtel a écrit :
>> I can have a try on a tile platform. I don't have access to sparc or
>> mips.
> Hmm, I've read arm instead of mips! So I've tried on mips. Data are
> aligned on 32-bit, like for all netlink messages. nla_put_u64() will
> do the same, as it calls nla_put().
> 
> And the kernel will only use memcpy() to treat this attribute. Reader
> will be in userland.

Then userland will trap if the 64-bit values are only 32-bit aligned.

That's the problem I'm talking about.

I don't want to export any more unaligned 64-bit values in netlink
messages, it's a complete mess.
--
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