Re: [RFC PATCH 1/2] Fix 1 untangling ima mess, part 2 with counters

From: Al Viro
Date: Mon Jan 25 2010 - 16:30:53 EST

On Mon, Jan 25, 2010 at 02:24:37PM -0500, Mimi Zohar wrote:

> The IMA counters are updated in alloc_file() and __dentry_open().
> __dentry_open() is called from a couple of places:
> lookup_instantiate_filp(), nameidata_to_filp() and dentry_open. Of
> these calls, files are only being measured in the nameidata_to_filp()
> path. So yes, the current ima_path_check() needs to be moved to after
> the dentry_open() in nfsd_open(), and also added after each of the other
> dentry_open() and lookup_instantiate_filp() calls. Otherwise the
> counters will be correct, but the files will not be measured.

Wrong. lookup_instantiate_filp() is followed by do_filp_open() ones.
So no, we don't need to add there. As for other dentry_open(), I'm
not at all convinced that we *want* ima_path_check() done for all
of those; it should be decided on per-call basis and it's not a trivial

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