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From: "Luis R. Rodriguez" <mcgrof@kernel.org>
To: Mimi Zohar <zohar@linux.vnet.ibm.com>
Cc: linux-integrity@vger.kernel.org,
	Hans de Goede <hdegoede@redhat.com>,
	Ard Biesheuvel <ard.biesheuvel@linaro.org>,
	Peter Jones <pjones@redhat.com>,
	linux-security-module@vger.kernel.org,
	linux-kernel@vger.kernel.org, David Howells <dhowells@redhat.com>,
	"Luis R . Rodriguez" <mcgrof@kernel.org>,
	Kees Cook <keescook@chromium.org>,
	Seth Forshee <seth.forshee@canonical.com>,
	Johannes Berg <johannes.berg@intel.com>,
	Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
	Andres Rodriguez <andresx7@gmail.com>
Subject: Re: [PATCH 3/6] firmware: differentiate between signed regulatory.db and other firmware
Date: Fri, 4 May 2018 00:07:43 +0000	[thread overview]
Message-ID: <20180504000743.GR27853@wotan.suse.de> (raw)
In-Reply-To: <1525182503-13849-4-git-send-email-zohar@linux.vnet.ibm.com>

On Tue, May 01, 2018 at 09:48:20AM -0400, Mimi Zohar wrote:
> Allow LSMs and IMA to differentiate between signed regulatory.db and
> other firmware.
> 
> Signed-off-by: Mimi Zohar <zohar@linux.vnet.ibm.com>
> Cc: Luis R. Rodriguez <mcgrof@suse.com>
> Cc: David Howells <dhowells@redhat.com>
> Cc: Kees Cook <keescook@chromium.org>
> Cc: Seth Forshee <seth.forshee@canonical.com>
> Cc: Johannes Berg <johannes.berg@intel.com>
> ---
>  drivers/base/firmware_loader/main.c | 5 +++++
>  include/linux/fs.h                  | 1 +
>  2 files changed, 6 insertions(+)
> 
> diff --git a/drivers/base/firmware_loader/main.c b/drivers/base/firmware_loader/main.c
> index eb34089e4299..d7cdf04a8681 100644
> --- a/drivers/base/firmware_loader/main.c
> +++ b/drivers/base/firmware_loader/main.c
> @@ -318,6 +318,11 @@ fw_get_filesystem_firmware(struct device *device, struct fw_priv *fw_priv)
>  			break;
>  		}
>  
> +#ifdef CONFIG_CFG80211_REQUIRE_SIGNED_REGDB
> +		if ((strcmp(fw_priv->fw_name, "regulatory.db") == 0) ||
> +		    (strcmp(fw_priv->fw_name, "regulatory.db.p7s") == 0))
> +			id = READING_FIRMWARE_REGULATORY_DB;
> +#endif

Whoa, no way.

>  		fw_priv->size = 0;
>  		rc = kernel_read_file_from_path(path, &fw_priv->data, &size,
>  						msize, id);
> diff --git a/include/linux/fs.h b/include/linux/fs.h
> index dc16a73c3d38..d1153c2884b9 100644
> --- a/include/linux/fs.h
> +++ b/include/linux/fs.h
> @@ -2811,6 +2811,7 @@ extern int do_pipe_flags(int *, int);
>  	id(FIRMWARE, firmware)		\
>  	id(FIRMWARE_PREALLOC_BUFFER, firmware)	\
>  	id(FIRMWARE_FALLBACK, firmware)	\
> +	id(FIRMWARE_REGULATORY_DB, firmware)	\

Why could IMA not appriase these files? They are part of the standard path.

  Luis

>  	id(MODULE, kernel-module)		\
>  	id(KEXEC_IMAGE, kexec-image)		\
>  	id(KEXEC_INITRAMFS, kexec-initramfs)	\
> -- 
> 2.7.5
> 
> 

-- 
Do not panic

  reply	other threads:[~2018-05-04  0:07 UTC|newest]

Thread overview: 30+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2018-05-01 13:48 [PATCH 0/6] firmware: kernel signature verification Mimi Zohar
2018-05-01 13:48 ` [PATCH 1/6] firmware: permit LSMs and IMA to fail firmware sysfs fallback loading Mimi Zohar
2018-05-04  0:02   ` Luis R. Rodriguez
2018-05-04  0:36     ` Mimi Zohar
2018-05-01 13:48 ` [PATCH 2/6] ima: prevent sysfs fallback firmware loading Mimi Zohar
2018-05-04  0:06   ` Luis R. Rodriguez
2018-05-01 13:48 ` [PATCH 3/6] firmware: differentiate between signed regulatory.db and other firmware Mimi Zohar
2018-05-04  0:07   ` Luis R. Rodriguez [this message]
2018-05-04  0:24     ` Mimi Zohar
2018-05-08 17:34       ` Luis R. Rodriguez
2018-05-09 11:30         ` Mimi Zohar
2018-05-09 19:15           ` Luis R. Rodriguez
2018-05-09 19:57             ` Mimi Zohar
2018-05-09 21:22               ` Luis R. Rodriguez
2018-05-09 22:06                 ` Mimi Zohar
2018-05-09 23:48                   ` Luis R. Rodriguez
2018-05-10  2:00                     ` Mimi Zohar
2018-05-10 23:26                       ` Luis R. Rodriguez
2018-05-11  5:00                         ` Mimi Zohar
2018-05-11 21:52                           ` Luis R. Rodriguez
2018-05-14 12:58                             ` Mimi Zohar
2018-05-14 19:28                               ` Luis R. Rodriguez
2018-05-15  2:02                                 ` Mimi Zohar
2018-05-15  3:26                                   ` Luis R. Rodriguez
2018-05-15 12:32                                     ` Josh Boyer
2018-05-15 12:43                                       ` Mimi Zohar
2018-05-01 13:48 ` [PATCH 4/6] ima: coordinate with signed regulatory.db Mimi Zohar
2018-05-01 13:48 ` [PATCH 5/6] ima: verify kernel firmware signatures when using a preallocated buffer Mimi Zohar
2018-05-01 13:48 ` [RFC PATCH 6/6] ima: prevent loading firmware into a pre-allocated buffer Mimi Zohar
2018-05-04  0:10   ` Luis R. Rodriguez

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