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From: David Howells <dhowells@redhat.com>
To: Dave Jiang <dave.jiang@intel.com>
Cc: alison.schofield@intel.com, keescook@chromium.org,
	linux-nvdimm@lists.01.org, ebiggers3@gmail.com,
	dhowells@redhat.com, keyrings@vger.kernel.org
Subject: Re: [PATCH v8 05/12] nfit/libnvdimm: add unlock of nvdimm support for Intel DIMMs
Date: Sat, 22 Sep 2018 00:20:50 +0100	[thread overview]
Message-ID: <17433.1537572050@warthog.procyon.org.uk> (raw)
In-Reply-To: <153549646600.4089.2626014553500613547.stgit@djiang5-desk3.ch.intel.com>

Dave Jiang <dave.jiang@intel.com> wrote:

> +	depends on KEYS

That needs to be in patch 2 where you create a keyring.

> +	char desc[NVDIMM_KEY_DESC_LEN + strlen(NVDIMM_PREFIX)];

You should be using sizeof() not strlen() and do you need + 1 for the NUL
char?

> +	sprintf(desc, "%s%s", NVDIMM_PREFIX, nvdimm->dimm_id);

NVDIMM_PREFIX is a constant string.  I would recommend either declaring it as
a const char[] or just sticking it in the format string in place of the %s:

	sprintf(desc, NVDIMM_PREFIX "%s", nvdimm->dimm_id);

> +		if (!cached_key) {
> +			key_link(nvdimm_keyring, key);
> +			nvdimm->key = key;
> +			key->perm |= KEY_USR_SEARCH;
> +		}

Ummm...  You're altering the key permission?  That's not really yours to
change.

> +static int nvdimm_check_key_len(unsigned short len, bool update)
> +{
> +	if (len == (NVDIMM_PASSPHRASE_LEN * 2) && update)
> +		return 0;

In the cover you said:

	- Modified "update" to take two key ids and and use lookup_user_key()
	  in order to improve security.  (David)

is this a holdover?

David
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  parent reply	other threads:[~2018-09-21 23:20 UTC|newest]

Thread overview: 30+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2018-08-28 22:47 [PATCH v8 00/12] Adding security support for nvdimm Dave Jiang
2018-08-28 22:47 ` [PATCH v8 01/12] nfit: add support for Intel DSM 1.7 commands Dave Jiang
2018-08-28 22:47 ` [PATCH v8 02/12] libnvdimm: create keyring to store security keys Dave Jiang
2018-09-22  0:19   ` Dan Williams
2018-09-24 21:04   ` David Howells
2018-09-24 21:12     ` Dave Jiang
2018-08-28 22:47 ` [PATCH v8 03/12] nfit/libnvdimm: store dimm id as a member to struct nvdimm Dave Jiang
2018-08-28 22:47 ` [PATCH v8 04/12] keys: export lookup_user_key to external users Dave Jiang
2018-09-21 21:59   ` Dan Williams
2018-09-21 22:02     ` Dave Jiang
2018-09-21 23:05   ` David Howells
2018-08-28 22:47 ` [PATCH v8 05/12] nfit/libnvdimm: add unlock of nvdimm support for Intel DIMMs Dave Jiang
2018-09-23  0:10   ` Dan Williams
2018-08-28 22:47 ` [PATCH v8 06/12] nfit/libnvdimm: add set passphrase support for Intel nvdimms Dave Jiang
2018-08-28 22:47 ` [PATCH v8 07/12] nfit/libnvdimm: add disable passphrase support to Intel nvdimm Dave Jiang
2018-08-28 22:48 ` [PATCH v8 08/12] nfit/libnvdimm: add freeze security " Dave Jiang
2018-08-28 22:48 ` [PATCH v8 09/12] nfit/libnvdimm: add support for issue secure erase DSM " Dave Jiang
2018-08-28 22:48 ` [PATCH v8 10/12] nfit_test: add context to dimm_dev for nfit_test Dave Jiang
2018-08-28 22:48 ` [PATCH v8 11/12] nfit_test: add test support for Intel nvdimm security DSMs Dave Jiang
2018-08-28 22:48 ` [PATCH v8 12/12] libnvdimm: add documentation for nvdimm security support Dave Jiang
2018-09-21 23:07 ` [PATCH v8 02/12] libnvdimm: create keyring to store security keys David Howells
2018-09-21 23:20 ` David Howells [this message]
2018-09-21 23:27   ` [PATCH v8 05/12] nfit/libnvdimm: add unlock of nvdimm support for Intel DIMMs Dave Jiang
2018-09-21 23:51     ` Dan Williams
2018-09-21 23:57 ` [PATCH v8 06/12] nfit/libnvdimm: add set passphrase support for Intel nvdimms David Howells
2018-09-22  0:25   ` Dave Jiang
2018-09-22  1:26     ` Dan Williams
2018-09-22  0:01 ` [PATCH v8 04/12] keys: export lookup_user_key to external users David Howells
2018-09-24 21:02 ` [PATCH v8 02/12] libnvdimm: create keyring to store security keys David Howells
2018-09-24 21:15   ` Dave Jiang

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