From: "Kirill A. Shutemov" <kirill@shutemov.name>
To: Cyrill Gorcunov <gorcunov@gmail.com>
Cc: Vasiliy Kulikov <segoon@openwall.com>,
containers@lists.osdl.org, linux-kernel@vger.kernel.org,
linux-fsdevel@vger.kernel.org, Nathan Lynch <ntl@pobox.com>,
Oren Laadan <orenl@cs.columbia.edu>,
Daniel Lezcano <dlezcano@fr.ibm.com>,
Glauber Costa <glommer@parallels.com>,
James Bottomley <jbottomley@parallels.com>,
Tejun Heo <tj@kernel.org>, Alexey Dobriyan <adobriyan@gmail.com>,
Al Viro <viro@ZenIV.linux.org.uk>,
Andrew Morton <akpm@linux-foundation.org>,
Pavel Emelyanov <xemul@parallels.com>
Subject: Re: [patch 2/2] fs, proc: Introduce the /proc/<pid>/map_files/ directory v6
Date: Wed, 31 Aug 2011 17:04:16 +0300 [thread overview]
Message-ID: <20110831140416.GA17626@shutemov.name> (raw)
In-Reply-To: <20110831112642.GI25465@sun>
On Wed, Aug 31, 2011 at 03:26:42PM +0400, Cyrill Gorcunov wrote:
> On Wed, Aug 31, 2011 at 01:06:12PM +0400, Vasiliy Kulikov wrote:
> > Hi,
> >
> > On Wed, Aug 31, 2011 at 11:58 +0400, Cyrill Gorcunov wrote:
> > > From: Pavel Emelyanov <xemul@parallels.com>
> > >
> > > This one behaves similarly to the /proc/<pid>/fd/ one - it contains symlinks
> > > one for each mapping with file, the name of a symlink is "vma->vm_start-vma->vm_end",
> > > the target is the file. Opening a symlink results in a file that point exactly
> > > to the same inode as them vma's one.
> >
> > I'm late noting it before the RFCv6 :) Besides checking
> > ptrace_may_access() on ->lookup and ->readdir you also should define
> > ->stat, otherwise you can bypass ptrace checks if there is a
> > corresponding dentry in the cache. The same issue existed in fd* handlers:
> >
> > http://www.openwall.com/lists/kernel-hardening/2011/08/29/1
> >
>
> OK, here is an updated one. Thanks for feedback. Hope this time
> all nits are addressed. Still reviews/complains are *very* appreciated.
Please run checkpatch. It points several warnings and one dangerous error.
--
Kirill A. Shutemov
next prev parent reply other threads:[~2011-08-31 14:04 UTC|newest]
Thread overview: 53+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-08-31 7:58 [patch 0/2] Introduce /proc/pid/map_files v6 Cyrill Gorcunov
2011-08-31 7:58 ` [patch 1/2] fs, proc: Make proc_get_link to use dentry instead of inode Cyrill Gorcunov
2011-08-31 7:58 ` [patch 2/2] fs, proc: Introduce the /proc/<pid>/map_files/ directory v6 Cyrill Gorcunov
2011-08-31 9:06 ` Vasiliy Kulikov
2011-08-31 10:12 ` Cyrill Gorcunov
2011-08-31 11:26 ` Cyrill Gorcunov
2011-08-31 14:04 ` Kirill A. Shutemov [this message]
2011-08-31 14:09 ` Cyrill Gorcunov
2011-08-31 14:26 ` Cyrill Gorcunov
2011-08-31 22:10 ` Andrew Morton
2011-09-01 3:07 ` Kyle Moffett
2011-09-01 7:58 ` Pavel Emelyanov
2011-09-01 11:50 ` Tejun Heo
2011-09-01 12:13 ` Pavel Emelyanov
2011-09-01 17:13 ` Tejun Heo
2011-09-02 19:15 ` Matt Helsley
2011-09-02 0:09 ` Matt Helsley
2011-09-01 8:05 ` Cyrill Gorcunov
2011-09-02 16:37 ` Vasiliy Kulikov
2011-09-05 18:53 ` Vasiliy Kulikov
2011-09-05 19:20 ` Cyrill Gorcunov
2011-09-05 19:49 ` Vasiliy Kulikov
2011-09-05 20:36 ` Cyrill Gorcunov
2011-09-06 10:15 ` Vasiliy Kulikov
2011-09-06 16:51 ` Tejun Heo
2011-09-06 17:29 ` Vasiliy Kulikov
2011-09-06 17:33 ` Tejun Heo
2011-09-06 18:15 ` Cyrill Gorcunov
[not found] ` <20110907112301.GA12157@albatros>
2011-09-07 21:53 ` Cyrill Gorcunov
2011-09-07 22:13 ` Andrew Morton
2011-09-07 22:42 ` Cyrill Gorcunov
2011-09-07 22:53 ` Andrew Morton
2011-09-08 5:48 ` Cyrill Gorcunov
2011-09-08 5:50 ` Cyrill Gorcunov
2011-09-08 6:04 ` Cyrill Gorcunov
2011-09-08 23:52 ` Andrew Morton
2011-09-09 0:24 ` Pavel Emelyanov
2011-09-09 5:48 ` Cyrill Gorcunov
2011-09-09 6:00 ` Andrew Morton
2011-09-09 6:22 ` Cyrill Gorcunov
2011-09-10 13:21 ` [kernel-hardening] " Vasiliy Kulikov
2011-09-10 13:49 ` Cyrill Gorcunov
2011-09-01 10:46 ` Cyrill Gorcunov
2011-09-01 22:49 ` Andrew Morton
2011-09-01 23:04 ` Tejun Heo
2011-09-02 5:54 ` Cyrill Gorcunov
2011-09-02 5:53 ` Cyrill Gorcunov
2011-08-31 22:50 ` Andrew Morton
2011-09-02 1:54 ` Nicholas Miell
2011-09-02 1:58 ` Tejun Heo
2011-09-02 2:04 ` Nicholas Miell
2011-09-02 2:29 ` Tejun Heo
2011-09-02 8:07 ` Kirill A. Shutemov
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