linux-kernel - Re: [PATCH v2] fail dentry revalidation after namespace change

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: <4FF6B37B.4040005@parallels.com>
Date:	Fri, 6 Jul 2012 13:44:27 +0400
From:	Glauber Costa <glommer@...allels.com>
To:	"Eric W. Biederman" <ebiederm@...ssion.com>
CC:	<linux-kernel@...r.kernel.org>, <netdev@...r.kernel.org>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Greg Thelen <gthelen@...gle.com>,
	Serge Hallyn <serge.hallyn@...onical.com>,
	Tejun Heo <tj@...nel.org>,
	Greg Kroah-Hartman <gregkh@...uxfoundation.org>
Subject: Re: [PATCH v2] fail dentry revalidation after namespace change

On 07/06/2012 01:37 PM, Eric W. Biederman wrote:
> Glauber Costa <glommer@...allels.com> writes:
> 
>> When we change the namespace tag of a sysfs entry, the associated dentry
>> is still kept around. readdir() will work correctly and not display the
>> old entries, but open() will still succeed, so will reads and writes.
> 
> Note reads and writes of file handles open before the move should
> continue to work.

Well, yes. But do you see it as a big problem?

This can probably be fixed as well, but I foresee a big hackishness in
the way =p
--
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/