linux-kernel - Re: [PATCH] vfs: fix IMA lockdep circular locking dependency

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Message-ID: <1338410016.2659.6.camel@falcor.watson.ibm.com>
Date:	Wed, 30 May 2012 16:33:36 -0400
From:	Mimi Zohar <zohar@...ux.vnet.ibm.com>
To:	Al Viro <viro@...IV.linux.org.uk>
Cc:	Eric Paris <eparis@...isplace.org>,
	Linus Torvalds <torvalds@...ux-foundation.org>,
	Mimi Zohar <zohar@...ibm.com>,
	linux-security-module@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] vfs: fix IMA lockdep circular locking dependency

On Wed, 2012-05-30 at 21:24 +0100, Al Viro wrote:
> On Wed, May 30, 2012 at 03:42:47PM -0400, Eric Paris wrote:
> > security_file_mmap() would pretty much only be used in do_mmap_pgoff()
> > (or validate_mmap_request)
> 
> Callers, actually - the whole point is to lift it out of under ->mmap_sem.
> The tricky part is reqprot vs. prot mess.

Linus already addressed it in the original patch, which I split into two
as you suggested:
733559f - "security: move security_file_mmap() and rename to security_mmap_file()" 
b3649e9 security: define and use the new security_mmap_addr() hook

git://git.kernel.org/pub/scm/linux/kernel/git/zohar/linux-integrity.  
 
Mimi


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