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From: Mimi Zohar <zohar@linux.ibm.com>
To: Roberto Sassu <roberto.sassu@huawei.com>, viro@zeniv.linux.org.uk
Cc: linux-security-module@vger.kernel.org,
	linux-integrity@vger.kernel.org, initramfs@vger.kernel.org,
	linux-api@vger.kernel.org, linux-fsdevel@vger.kernel.org,
	linux-kernel@vger.kernel.org, bug-cpio@gnu.org,
	zohar@linux.vnet.ibm.com, silviu.vlasceanu@huawei.com,
	dmitry.kasatkin@huawei.com, takondra@cisco.com,
	kamensky@cisco.com, hpa@zytor.com, arnd@arndb.de,
	rob@landley.net, james.w.mcmechan@gmail.com,
	niveditas98@gmail.com
Subject: Re: [PATCH v4 0/3] initramfs: add support for xattrs in the initial ram disk
Date: Mon, 01 Jul 2019 09:22:16 -0400	[thread overview]
Message-ID: <1561987336.4067.8.camel@linux.ibm.com> (raw)
In-Reply-To: <20190523121803.21638-1-roberto.sassu@huawei.com>

On Thu, 2019-05-23 at 14:18 +0200, Roberto Sassu wrote:
> This patch set aims at solving the following use case: appraise files from
> the initial ram disk. To do that, IMA checks the signature/hash from the
> security.ima xattr. Unfortunately, this use case cannot be implemented
> currently, as the CPIO format does not support xattrs.
> 
> This proposal consists in including file metadata as additional files named
> METADATA!!!, for each file added to the ram disk. The CPIO parser in the
> kernel recognizes these special files from the file name, and calls the
> appropriate parser to add metadata to the previously extracted file. It has
> been proposed to use bit 17:16 of the file mode as a way to recognize files
> with metadata, but both the kernel and the cpio tool declare the file mode
> as unsigned short.

Thanks, Roberto!

Victor, Taras, Rob, Arvind, Peter, if you're good with this latest
design, could we get some Reviewed-by, Acked-by, or Tested-by?

thanks!

Mimi


      parent reply	other threads:[~2019-07-01 13:22 UTC|newest]

Thread overview: 15+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2019-05-23 12:18 Roberto Sassu
2019-05-23 12:18 ` [PATCH v4 1/3] initramfs: add file metadata Roberto Sassu
2019-05-23 12:18 ` [PATCH v4 2/3] initramfs: read metadata from special file METADATA!!! Roberto Sassu
2019-07-01 12:54   ` Mimi Zohar
2019-05-23 12:18 ` [PATCH v4 3/3] gen_init_cpio: add support for file metadata Roberto Sassu
2019-06-30 15:27   ` Mimi Zohar
2019-06-03  9:31 ` [PATCH v4 0/3] initramfs: add support for xattrs in the initial ram disk Roberto Sassu
2019-06-03 18:32   ` Rob Landley
2019-06-26  8:15     ` Roberto Sassu
2019-06-30 15:39       ` Mimi Zohar
2019-07-01 13:42         ` Roberto Sassu
2019-07-01 14:31           ` Mimi Zohar
2019-07-15 16:54             ` Roberto Sassu
2019-07-24 15:34               ` Roberto Sassu
2019-07-01 13:22 ` Mimi Zohar [this message]

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