From: "Luis R. Rodriguez" <mcgrof@kernel.org>
To: Mimi Zohar <zohar@linux.vnet.ibm.com>
Cc: Kees Cook <keescook@chromium.org>,
Ard Biesheuvel <ard.biesheuvel@linaro.org>,
Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
kexec@lists.infradead.org, linux-security-module@vger.kernel.org,
linux-kernel@vger.kernel.org, David Howells <dhowells@redhat.com>,
"Luis R . Rodriguez" <mcgrof@kernel.org>,
Eric Biederman <ebiederm@xmission.com>,
linux-integrity@vger.kernel.org,
Andres Rodriguez <andresx7@gmail.com>
Subject: Re: [PATCH v4 4/8] firmware: add call to LSM hook before firmware sysfs fallback
Date: Fri, 1 Jun 2018 20:19:13 +0200 [thread overview]
Message-ID: <20180601181913.GN4511@wotan.suse.de> (raw)
In-Reply-To: <1527616920-5415-5-git-send-email-zohar@linux.vnet.ibm.com>
On Tue, May 29, 2018 at 02:01:56PM -0400, Mimi Zohar wrote:
> Add an LSM hook prior to allowing firmware sysfs fallback loading.
Acked-by: Luis R. Rodriguez <mcgrof@kernel.org>
> 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>
>
> Changelog v4:
> - call new LSM security_kernel_arg hook
>
> Changelog v2:
> - call security_kernel_read_blob()
> - rename the READING_FIRMWARE_FALLBACK kernel_read_file_id enumeration to
> READING_FIRMWARE_FALLBACK_SYSFS.
> ---
> drivers/base/firmware_loader/fallback.c | 7 +++++++
> 1 file changed, 7 insertions(+)
>
> diff --git a/drivers/base/firmware_loader/fallback.c b/drivers/base/firmware_loader/fallback.c
> index 358354148dec..2443bda81631 100644
> --- a/drivers/base/firmware_loader/fallback.c
> +++ b/drivers/base/firmware_loader/fallback.c
> @@ -651,6 +651,8 @@ static bool fw_force_sysfs_fallback(unsigned int opt_flags)
>
> static bool fw_run_sysfs_fallback(unsigned int opt_flags)
> {
> + int ret;
> +
> if (fw_fallback_config.ignore_sysfs_fallback) {
> pr_info_once("Ignoring firmware sysfs fallback due to sysctl knob\n");
> return false;
> @@ -659,6 +661,11 @@ static bool fw_run_sysfs_fallback(unsigned int opt_flags)
> if ((opt_flags & FW_OPT_NOFALLBACK))
> return false;
>
> + /* Also permit LSMs and IMA to fail firmware sysfs fallback */
> + ret = security_kernel_load_data(LOADING_FIRMWARE);
> + if (ret < 0)
> + return ret;
> +
> return fw_force_sysfs_fallback(opt_flags);
> }
>
> --
> 2.7.5
>
>
--
Do not panic
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next prev parent reply other threads:[~2018-06-01 18:19 UTC|newest]
Thread overview: 43+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-05-29 18:01 [PATCH v4 0/8] kexec/firmware: support system wide policy requiring signatures Mimi Zohar
2018-05-29 18:01 ` [PATCH v4 1/8] security: define new LSM hook named security_kernel_load_data Mimi Zohar
2018-06-04 19:59 ` Serge E. Hallyn
2018-05-29 18:01 ` [PATCH v4 2/8] kexec: add call to LSM hook in original kexec_load syscall Mimi Zohar
2018-06-04 20:00 ` Serge E. Hallyn
2018-05-29 18:01 ` [PATCH v4 3/8] ima: based on policy require signed kexec kernel images Mimi Zohar
2018-05-29 18:01 ` [PATCH v4 4/8] firmware: add call to LSM hook before firmware sysfs fallback Mimi Zohar
2018-06-01 18:19 ` Luis R. Rodriguez [this message]
2018-05-29 18:01 ` [PATCH v4 5/8] ima: based on policy require signed firmware (sysfs fallback) Mimi Zohar
2018-06-01 18:21 ` Luis R. Rodriguez
2018-06-01 22:39 ` Mimi Zohar
2018-06-01 22:46 ` Luis R. Rodriguez
2018-06-01 23:04 ` Mimi Zohar
2018-05-29 18:01 ` [PATCH v4 6/8] ima: add build time policy Mimi Zohar
2018-05-29 18:01 ` [RFC PATCH v4 7/8] ima: based on policy prevent loading firmware (pre-allocated buffer) Mimi Zohar
2018-06-01 19:15 ` Luis R. Rodriguez
2018-06-01 19:25 ` Luis R. Rodriguez
2018-06-05 22:37 ` Kees Cook
2018-06-06 6:20 ` Ard Biesheuvel
2018-06-06 22:06 ` Luis R. Rodriguez
2018-05-29 18:02 ` [PATCH v4 8/8] module: replace the existing LSM hook in init_module Mimi Zohar
2018-05-29 22:39 ` Paul Moore
2018-05-29 23:14 ` Mimi Zohar
2018-05-30 21:00 ` Paul Moore
2018-05-31 15:23 ` [PATCH v4a " Mimi Zohar
2018-06-01 22:28 ` Paul Moore
2018-06-04 9:19 ` Jessica Yu
2018-06-05 19:45 ` Kees Cook
2018-06-05 21:35 ` Mimi Zohar
2018-06-05 22:26 ` Kees Cook
2018-06-05 22:40 ` Mimi Zohar
2018-05-29 23:25 ` [PATCH v4 " Mimi Zohar
2018-05-30 2:25 ` Eric W. Biederman
2018-05-30 21:09 ` Paul Moore
2018-06-04 14:03 ` [PATCH v4 0/8] kexec/firmware: support system wide policy requiring signatures Mimi Zohar
2018-06-04 19:32 ` Serge E. Hallyn
2018-06-04 19:53 ` Mimi Zohar
2018-06-04 22:03 ` Kees Cook
2018-06-05 4:09 ` Serge E. Hallyn
2018-06-05 12:19 ` Kees Cook
2018-06-05 13:25 ` Serge E. Hallyn
2018-06-05 13:43 ` Kees Cook
2018-06-05 14:05 ` Mimi Zohar
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