linux-kernel - Re: [PATCH] autofs

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]

Date:	Wed, 23 Apr 2014 14:46:24 -0700
From:	Andrew Morton <akpm@...ux-foundation.org>
To:	Ian Kent <raven@...maw.net>
Cc:	autofs mailing list <autofs@...r.kernel.org>,
	Kernel Mailing List <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH] autofs - fix lockref lookup

On Wed, 23 Apr 2014 13:20:36 +0800 Ian Kent <raven@...maw.net> wrote:

> autofs needs to be able to see private data dentry flags for
> its dentrys that are being created but not yet hashed and for
> its dentys that have been rmdir()ed but not yet freed. It
> needs to do this so it can block processes in these states
> until a status has been returned to indicate the given
> operation is complete.
> 
> It does this by keeping two lists, active and expring, of
> dentrys in this state and uses ->d_release() to keep them
> stable while it checks the reference count to determine
> if they should be used.
> 
> But with the recent lockref changes dentrys being freed
> sometimes don't transition to a reference count of 0 before
> being freed so autofs can occassionally use a dentry that
> is invalid which can lead to a panic.

What's the value of "recent"?  I assume 3.14 is OK?
--
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/