linux-kernel - Re: [PATCH 0/5] ecryptfs fixes

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Message-Id: <201011101031.34153.roberto.sassu@polito.it>
Date:	Wed, 10 Nov 2010 10:31:33 +0100
From:	Roberto Sassu <roberto.sassu@...ito.it>
To:	Tyler Hicks <tyhicks@...ux.vnet.ibm.com>
Cc:	kirkland@...onical.com, jmorris@...ei.org,
	linux-security-module@...r.kernel.org,
	linux-kernel@...r.kernel.org, linux-fsdevel@...r.kernel.org
Subject: Re: [PATCH 0/5] ecryptfs fixes

Hi Tyler

thanks for accepting my patches. 
There is another O_RDONLY test in the function ecryptfs_privileged_open(), in the file fs/ecryptfs/kthread.c,
that is not actually fixed, because i need some explanations on the code.
In this function the dentry_open() is called first time with flags (O_LARGEFILE | O_RDWR) or
(O_LARGEFILE | O_RDONLY) depending on the options passed during the mount of the lower
filesystem.
If the dentry_open() fails, a lower_file pointer can be obtained from the function ecryptfs_threadfn()
executed by the kernel kthread service. However, this option is available only if the lower filesystem
is mounted in read-write mode.
Can you explain me this?
Thanks.

Roberto


On Tuesday, November 09, 2010 11:01:44 pm Tyler Hicks wrote:
> On Wed Nov 03, 2010 at 11:11:06AM +0100, Roberto Sassu <roberto.sassu@...ito.it> wrote:
> > This patch set applies to the latest kernel 2.6.37-rc1.
> > 
> > 
> > Roberto Sassu (5):
> >   ecryptfs: moved ECRYPTFS_SUPER_MAGIC definition to linux/magic.h
> >   ecryptfs: missing initialization of the superblock 'magic' field
> >   ecryptfs: test lower_file pointer when lower_file_mutex is locked
> >   ecryptfs: fixed testing of file descriptor flags
> >   ecryptfs: open lower files with kthread credentials
> 
> Hey Roberto - I pushed these patches to
> git://git.kernel.org/pub/scm/linux/kernel/git/ecryptfs/ecryptfs-2.6.git#next
> 
> Thanks,
> Tyler
> 
> > 
> >  fs/ecryptfs/ecryptfs_kernel.h |    4 +---
> >  fs/ecryptfs/file.c            |   20 +++++++++-----------
> >  fs/ecryptfs/inode.c           |   32 ++++++++++++++------------------
> >  fs/ecryptfs/kthread.c         |   17 +++++++++++++----
> >  fs/ecryptfs/main.c            |    5 +++--
> >  include/linux/magic.h         |    1 +
> >  6 files changed, 41 insertions(+), 38 deletions(-)
> > 
> 
> 
> 
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