linux-kernel - Re: [PATCH 06/20] sysfs: Use dentry_ops instead of directly playing with the dcache

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]

Date:	Thu, 21 May 2009 16:40:55 +0900
From:	Tejun Heo <tj@...nel.org>
To:	"Eric W. Biederman" <ebiederm@...ssion.com>
CC:	Andrew Morton <akpm@...ux-foundation.org>,
	Greg Kroah-Hartman <gregkh@...e.de>,
	linux-kernel@...r.kernel.org,
	Cornelia Huck <cornelia.huck@...ibm.com>,
	linux-fsdevel@...r.kernel.org,
	"Eric W. Biederman" <ebiederm@...stanetworks.com>
Subject: Re: [PATCH 06/20] sysfs: Use dentry_ops instead of directly playing
 with the dcache

Eric W. Biederman wrote:
>> Ummm... what happens if sysfs recreates those identical nodes again
>> while the old dentries are lingering?  The dead ones will linger till
>> the submounts are gone and then look ups after that will show the new
>> ones, right?
> 
> Yep.  On the vfs level.  The sysfs dirent tree will reflect what is
> going on with the hardware.
> 
> This is a vfs misfeature, that I hope someday we will get fixed.
> But for now it is better not to leak mount points.  Especially
> since no one actually mounts things on sysfs.

fuse and debugfs do.  :-P

Acked-by: Tejun Heo <tj@...nel.org>

-- 
tejun
--
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/