From: Nazarov Sergey <s-nazarov@yandex.ru>
To: "Vivek Goyal" <vgoyal@redhat.com>,
"Ignacy Gawędzki" <ignacy.gawedzki@green-communications.fr>,
"linux-unionfs@vger.kernel.org" <linux-unionfs@vger.kernel.org>,
"linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>
Cc: "linux-fsdevel@vger.kernel.org" <linux-fsdevel@vger.kernel.org>
Subject: Re: [PATCH v2 1/1] OverlayFS: Fix checking permissions during lookup.
Date: Sat, 27 Feb 2016 13:40:02 +0300 [thread overview]
Message-ID: <419661456569602@web21g.yandex.ru> (raw)
In-Reply-To: <20160226194143.GB13054@redhat.com>
26.02.2016, 22:41, "Vivek Goyal" <vgoyal@redhat.com>:
>
> So what's the problem we are trying to solve. Why should we able to
> override the DAC checks of lower layer if same directory in upper
> is searchable for user but it is not searchable in lower layer.
>
If I right, this is a one of the main feature of overlayfs - upper layer has priority over lower ones.
Override AC checks necessary for lookup operation only. Lower layer files access AC checks
remain, so this should not be a security problem.
Sergey.
next prev parent reply other threads:[~2016-02-27 10:50 UTC|newest]
Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-02-24 13:55 [PATCH v2 1/1] OverlayFS: Fix checking permissions during lookup Ignacy Gawędzki
2016-02-26 19:41 ` Vivek Goyal
2016-02-27 10:40 ` Nazarov Sergey [this message]
2016-02-29 16:32 ` Vivek Goyal
2016-02-28 11:09 ` Ignacy Gawędzki
2016-02-29 16:25 ` Vivek Goyal
2016-02-29 16:54 ` Ignacy Gawędzki
2016-03-17 15:23 ` Miklos Szeredi
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