linux-kernel - [PATCH v2 1/7] sysfs/cpu: Add "Unknown" vulnerability state

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Date:   Wed,  2 Jan 2019 18:49:15 -0600
From:   Jeremy Linton <jeremy.linton@....com>
To:     linux-arm-kernel@...ts.infradead.org
Cc:     catalin.marinas@....com, will.deacon@....com, marc.zyngier@....com,
        suzuki.poulose@....com, dave.martin@....com,
        shankerd@...eaurora.org, mark.rutland@....com,
        linux-kernel@...r.kernel.org, ykaukab@...e.de,
        julien.thierry@....com, mlangsdo@...hat.com, steven.price@....com,
        Jeremy Linton <jeremy.linton@....com>,
        Thomas Gleixner <tglx@...utronix.de>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        "Rafael J . Wysocki" <rafael.j.wysocki@...el.com>,
        Konrad Rzeszutek Wilk <konrad.wilk@...cle.com>,
        Peter Zijlstra <peterz@...radead.org>,
        Dave Hansen <dave.hansen@...el.com>,
        Borislav Petkov <bp@...en8.de>,
        David Woodhouse <dwmw@...zon.co.uk>
Subject: [PATCH v2 1/7] sysfs/cpu: Add "Unknown" vulnerability state

There is a lot of variation in the Arm ecosystem. Because of this,
there exist possible cases where the kernel cannot authoritatively
determine if a machine is vulnerable.

Rather than guess the vulnerability status in cases where
the mitigation is disabled or the firmware isn't responding
correctly, we need to display an "Unknown" state.

Signed-off-by: Jeremy Linton <jeremy.linton@....com>
Cc: Thomas Gleixner <tglx@...utronix.de>
Cc: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
Cc: Rafael J. Wysocki <rafael.j.wysocki@...el.com>
Cc: Konrad Rzeszutek Wilk <konrad.wilk@...cle.com>
Cc: Peter Zijlstra <peterz@...radead.org>
Cc: Dave Hansen <dave.hansen@...el.com>
Cc: Borislav Petkov <bp@...en8.de>
Cc: David Woodhouse <dwmw@...zon.co.uk>
---
 Documentation/ABI/testing/sysfs-devices-system-cpu | 1 +
 1 file changed, 1 insertion(+)

diff --git a/Documentation/ABI/testing/sysfs-devices-system-cpu b/Documentation/ABI/testing/sysfs-devices-system-cpu
index 9605dbd4b5b5..876103fddfa4 100644
--- a/Documentation/ABI/testing/sysfs-devices-system-cpu
+++ b/Documentation/ABI/testing/sysfs-devices-system-cpu
@@ -495,6 +495,7 @@ Description:	Information about CPU vulnerabilities
 		"Not affected"	  CPU is not affected by the vulnerability
 		"Vulnerable"	  CPU is affected and no mitigation in effect
 		"Mitigation: $M"  CPU is affected and mitigation $M is in effect
+		"Unknown"    	  The kernel is unable to make a determination
 
 		Details about the l1tf file can be found in
 		Documentation/admin-guide/l1tf.rst
-- 
2.17.2