From: James Bottomley <James.Bottomley@HansenPartnership.com>
To: Matthew Garrett <mjg59@google.com>, Mimi Zohar <zohar@linux.ibm.com>
Cc: linux-integrity <linux-integrity@vger.kernel.org>,
Dmitry Kasatkin <dmitry.kasatkin@gmail.com>,
linux-fsdevel@vger.kernel.org, miklos@szeredi.hu
Subject: Re: [PATCH V2 3/4] IMA: Optionally make use of filesystem-provided hashes
Date: Thu, 04 Apr 2019 15:18:48 -0700 [thread overview]
Message-ID: <1554416328.24612.11.camel@HansenPartnership.com> (raw)
In-Reply-To: <CACdnJuv2zV1OnbVaHqkB2UU=dAEzzffajAFg_xsgXRMvuZ5fTw@mail.gmail.com>
On Thu, 2019-04-04 at 14:46 -0700, Matthew Garrett wrote:
> On Thu, Mar 7, 2019 at 2:41 PM Matthew Garrett <mjg59@google.com>
> wrote:
> > Yup, happy to get further feedback on this.
>
> Anyone other than me and Mimi with thoughts here? :)
The obvious other thought is integration with fs-verity, which is a
filesystem maintained possibly signed merkel tree hash. The problem
here is what does vfs_get_hash() actually mean? The assumption seems
to be that it is the flat hash of the entire file which doesn't work
for merkle trees. However, if it could be a representative hash of the
file which is produced however the filesystem decides, it could work
(well, unless the file is copied on to a different fs, of course ...).
James
next prev parent reply other threads:[~2019-04-04 22:18 UTC|newest]
Thread overview: 41+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-02-26 21:50 Allow trusted filesystems to provide IMA hashes directly Matthew Garrett
2019-02-26 21:50 ` [PATCH V2 1/4] VFS: Add a call to obtain a file's hash Matthew Garrett
2019-02-26 21:50 ` [PATCH V2 2/4] IMA: Allow rule matching on filesystem subtype Matthew Garrett
2019-02-26 21:50 ` [PATCH V2 3/4] IMA: Optionally make use of filesystem-provided hashes Matthew Garrett
2019-02-28 16:03 ` Mimi Zohar
2019-02-28 18:05 ` Mimi Zohar
2019-02-28 21:41 ` Matthew Garrett
2019-02-28 21:59 ` Mimi Zohar
2019-02-28 22:38 ` Matthew Garrett
2019-03-04 19:52 ` Matthew Garrett
2019-03-04 20:32 ` Mimi Zohar
2019-03-04 22:10 ` Matthew Garrett
2019-03-05 13:18 ` Mimi Zohar
2019-03-05 18:39 ` Matthew Garrett
2019-03-05 19:51 ` Mimi Zohar
2019-03-05 20:27 ` Matthew Garrett
2019-03-06 12:30 ` Mimi Zohar
2019-03-06 18:31 ` Matthew Garrett
2019-03-06 22:38 ` Mimi Zohar
2019-03-06 23:36 ` Matthew Garrett
2019-03-07 1:54 ` Mimi Zohar
2019-03-07 4:19 ` Matthew Garrett
2019-03-07 20:48 ` Mimi Zohar
2019-03-07 22:41 ` Matthew Garrett
2019-04-04 21:46 ` Matthew Garrett
2019-04-04 22:18 ` James Bottomley [this message]
2019-04-04 22:26 ` Matthew Garrett
2019-04-04 22:35 ` James Bottomley
2019-04-05 1:50 ` Matthew Garrett
2019-04-05 2:26 ` James Bottomley
2019-04-05 20:55 ` Matthew Garrett
2019-04-29 22:51 ` Matthew Garrett
2019-05-02 20:25 ` Mimi Zohar
2019-05-02 22:37 ` Matthew Garrett
2019-05-02 23:02 ` Mimi Zohar
2019-05-03 6:51 ` Roberto Sassu
2019-05-03 8:17 ` Roberto Sassu
2019-05-03 12:47 ` Mimi Zohar
2019-05-03 13:20 ` Roberto Sassu
2019-02-26 21:50 ` [PATCH V2 4/4] FUSE: Allow filesystems to provide gethash methods Matthew Garrett
2019-02-27 14:26 ` Jann Horn
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=1554416328.24612.11.camel@HansenPartnership.com \
--to=james.bottomley@hansenpartnership.com \
--cc=dmitry.kasatkin@gmail.com \
--cc=linux-fsdevel@vger.kernel.org \
--cc=linux-integrity@vger.kernel.org \
--cc=miklos@szeredi.hu \
--cc=mjg59@google.com \
--cc=zohar@linux.ibm.com \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.