[RFC PATCH 2/4] ima: define new ima_sb_post_new_mount hook

Jeff Layton jlayton at redhat.com
Thu Dec 7 14:50:16 UTC 2017

On Thu, 2017-12-07 at 09:35 -0500, Mimi Zohar wrote:
> Hi Jeff,
> [The IMA/EVM and the TPM mailing lists have been combined as a single
> linux-integrity mailing list.]
> On Thu, 2017-12-07 at 07:26 -0500, Jeff Layton wrote:
> > Sorry for the late review. I just started dusting off my i_version
> > rework, and noticed that IMA still has unaddressed problems here.
> <snip>
> > Personally, I'm not a huge fan of this scheme. It seems quite invasive,
> > and doesn't really seem to address the stated problem well.
> A cleaned up version of this patch set was meant to follow the
> introduction of a new integrity_read method, but that patch set was
> rejected.  At this point, I have no intentions of upstreaming a
> cleaned up version this patch set either.
> > The warning itself seems ok, but I don't really see what's wrong with
> > performing remeasurement when the mtime changes on filesystems that
> > don't have SB_I_VERSION set. Surely that's better than limiting it to an
> > initial measurement?
> > 
> > Maybe I just don't understand what you're really trying to achieve here.
> Based on discussions with Sascha Hauer, he convinced me the i_version
> test is basically just a performance improvement and posted a patch
> that checks the filesystem for i_version support, before relying on it
> -  https://www.spinics.net/lists/linux-integrity/msg00033.html.
> Mimi

Thanks for the link. That patch looks good to me. Any idea when and if
it will be merged?

Jeff Layton <jlayton at redhat.com>
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