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From: Mimi Zohar <zohar@linux.ibm.com>
To: Matthew Garrett <mjg59@google.com>
Cc: jmorris@namei.org,
	LSM List <linux-security-module@vger.kernel.org>,
	Linux Kernel Mailing List <linux-kernel@vger.kernel.org>,
	David Howells <dhowells@redhat.com>
Subject: Re: [PULL REQUEST] Lock down patches
Date: Thu, 28 Feb 2019 20:44:14 -0500
Message-ID: <1551404654.10911.276.camel@linux.ibm.com> (raw)
In-Reply-To: <CACdnJutqg26pk5xnK2ii3ia9JabAnBptE3YQ3yLvVT93as666Q@mail.gmail.com>

On Thu, 2019-02-28 at 17:01 -0800, Matthew Garrett wrote:

> > That's not a valid reason for preventing systems that do use IMA for
> > verifying the kexec kernel image signature or kernel module signatures
> > from enabling "lock down".  This just means that there needs to be
> > some coordination between the different signature verification
> > methods. [1][2]
> 
> I agree, but the current form of the integration makes it impossible
> for anyone using an IMA-enabled kernel (but not using IMA) to do
> anything unless they have IMA signatures. It's a problem we need to
> solve, I just don't think it's a problem we need to solve before
> merging the patchset.

That's simply not true.  Have you even looked at the IMA architecture
patches?

fcf338449af5 x86/ima: require signed kernel modules
d958083a8f64 x86/ima: define arch_get_ima_policy() for x86

Mimi


  reply index

Thread overview: 45+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2019-02-28 21:28 Matthew Garrett
2019-02-28 22:20 ` Mimi Zohar
2019-02-28 23:13   ` Matthew Garrett
2019-03-01  0:05     ` Mimi Zohar
2019-03-01  1:01       ` Matthew Garrett
2019-03-01  1:44         ` Mimi Zohar [this message]
2019-03-01  3:33           ` Matthew Garrett
2019-03-01  4:16             ` Mimi Zohar
2019-02-28 22:44 ` [PATCH 01/27] Add the ability to lock down access to the running kernel image Matthew Garrett
2019-02-28 22:44   ` [PATCH 02/27] Add a SysRq option to lift kernel lockdown Matthew Garrett
2019-02-28 23:10 ` [PATCH 01/27] Add the ability to lock down access to the running kernel image Matthew Garrett
2019-02-28 23:10   ` [PATCH 02/27] Add a SysRq option to lift kernel lockdown Matthew Garrett
2019-02-28 23:11 ` [PATCH 01/27] Add the ability to lock down access to the running kernel image Matthew Garrett
2019-02-28 23:11   ` [PATCH 02/27] Add a SysRq option to lift kernel lockdown Matthew Garrett
2019-02-28 23:11 ` [PATCH 01/27] Add the ability to lock down access to the running kernel image Matthew Garrett
2019-02-28 23:11   ` [PATCH 02/27] Add a SysRq option to lift kernel lockdown Matthew Garrett
2019-02-28 23:11   ` [PATCH 03/27] Enforce module signatures if the kernel is locked down Matthew Garrett
2019-02-28 23:11   ` [PATCH 04/27] Restrict /dev/{mem,kmem,port} when " Matthew Garrett
2019-02-28 23:11   ` [PATCH 05/27] kexec_load: Disable at runtime if " Matthew Garrett
2019-02-28 23:11   ` [PATCH 06/27] Copy secure_boot flag in boot params across kexec reboot Matthew Garrett
2019-02-28 23:11   ` [PATCH 07/27] kexec_file: split KEXEC_VERIFY_SIG into KEXEC_SIG and KEXEC_SIG_FORCE Matthew Garrett
2019-02-28 23:11   ` [PATCH 08/27] kexec_file: Restrict at runtime if the kernel is locked down Matthew Garrett
2019-03-01  2:05     ` Mimi Zohar
2019-02-28 23:11   ` [PATCH 09/27] hibernate: Disable when " Matthew Garrett
2019-03-19 22:15     ` Pavel Machek
2019-02-28 23:11   ` [PATCH 10/27] uswsusp: " Matthew Garrett
2019-02-28 23:11   ` [PATCH 11/27] PCI: Lock down BAR access " Matthew Garrett
2019-02-28 23:11   ` [PATCH 12/27] x86: Lock down IO port " Matthew Garrett
2019-02-28 23:11   ` [PATCH 13/27] x86/msr: Restrict MSR " Matthew Garrett
2019-02-28 23:11   ` [PATCH 14/27] ACPI: Limit access to custom_method " Matthew Garrett
2019-02-28 23:11   ` [PATCH 15/27] acpi: Ignore acpi_rsdp kernel param when the kernel has been " Matthew Garrett
2019-02-28 23:11   ` [PATCH 16/27] acpi: Disable ACPI table override if the kernel is " Matthew Garrett
2019-02-28 23:11   ` [PATCH 17/27] acpi: Disable APEI error injection " Matthew Garrett
2019-02-28 23:11   ` [PATCH 18/27] Prohibit PCMCIA CIS storage when " Matthew Garrett
2019-02-28 23:11   ` [PATCH 19/27] Lock down TIOCSSERIAL Matthew Garrett
2019-02-28 23:11   ` [PATCH 20/27] Lock down module params that specify hardware parameters (eg. ioport) Matthew Garrett
2019-02-28 23:11   ` [PATCH 21/27] x86/mmiotrace: Lock down the testmmiotrace module Matthew Garrett
2019-02-28 23:11   ` [PATCH 22/27] Lock down /proc/kcore Matthew Garrett
2019-02-28 23:11   ` [PATCH 23/27] Lock down kprobes Matthew Garrett
2019-02-28 23:12   ` [PATCH 24/27] bpf: Restrict kernel image access functions when the kernel is locked down Matthew Garrett
2019-02-28 23:12   ` [PATCH 25/27] Lock down perf Matthew Garrett
2019-02-28 23:12   ` [PATCH 26/27] debugfs: Restrict debugfs when the kernel is locked down Matthew Garrett
2019-02-28 23:12   ` [PATCH 27/27] lockdown: Print current->comm in restriction messages Matthew Garrett
2019-02-28 23:24 ` [PULL REQUEST] Lock down patches Randy Dunlap
2019-03-04 22:10 ` Matthew Garrett

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