linux-kernel - Re: IMA and fs

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Message-ID: <OFAE6426B8.ECBED7A5-ON8525759B.00640328-8525759B.0064BD10@us.ibm.com>
Date:	Fri, 17 Apr 2009 14:20:20 -0400
From:	Mimi Zohar <zohar@...ibm.com>
To:	hooanon05@...oo.co.jp
Cc:	linux-kernel@...r.kernel.org, xfs-masters@....sgi.com,
	david safford <safford@...son.ibm.com>
Subject: Re: IMA and fs

hooanon05@...oo.co.jp wrote on 04/17/2009 09:57:46 AM:

> Mimi Zohar:
> > > xfs_iget() holds spinlock before xfs_iget_cache_hit(), and
> > > ima_inode_alloc() cannot use GFP_KERNEL.
> > 
> > This looks similar to the xfs - IMA problem discussed
> > http://lkml.org/lkml/2009/2/20/327.
> 
> Yes, the same issue.
> I didn't know it was discussed before.
> So what is the conclusion? Are you waiting for fixing the spinlock in
> xfs?

Yes. I just assumed, incorrectly, the xfs maintainer was notified.
Am copying the xfs maintainer now.

> > > Does nfsd_open() need to to call ima_path_check()?
>    :::
> > Yes, in order for the open/free to be balanced in ima_file_free().
> 
> Then how about putting ima_path_check() into __dentry_open() instead of
> may_open()?
> 
> 
> J. R. Okajima

Interesting.  Am looking into it.

Thanks!

Mimi Zohar
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