linux-kernel - [PATCH 4.9 06/38] Documentation: refer to config RANDOMIZE_BASE for kernel address-space randomization

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Message-Id: <20220310140808.323981477@linuxfoundation.org>
Date:   Thu, 10 Mar 2022 15:13:19 +0100
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     linux-kernel@...r.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        stable@...r.kernel.org, Lukas Bulwahn <lukas.bulwahn@...il.com>,
        Jonathan Corbet <corbet@....net>,
        Ben Hutchings <ben@...adent.org.uk>
Subject: [PATCH 4.9 06/38] Documentation: refer to config RANDOMIZE_BASE for kernel address-space randomization

From: Lukas Bulwahn <lukas.bulwahn@...il.com>

commit 82ca67321f55a8d1da6ac3ed611da3c32818bb37 upstream.

The config RANDOMIZE_SLAB does not exist, the authors probably intended to
refer to the config RANDOMIZE_BASE, which provides kernel address-space
randomization. They probably just confused SLAB with BASE (these two
four-letter words coincidentally share three common letters), as they also
point out the config SLAB_FREELIST_RANDOM as further randomization within
the same sentence.

Fix the reference of the config for kernel address-space randomization to
the config that provides that.

Fixes: 6e88559470f5 ("Documentation: Add section about CPU vulnerabilities for Spectre")
Signed-off-by: Lukas Bulwahn <lukas.bulwahn@...il.com>
Link: https://lore.kernel.org/r/20211230171940.27558-1-lukas.bulwahn@gmail.com
Signed-off-by: Jonathan Corbet <corbet@....net>
[bwh: Backported to 4.9: adjust filename]
Signed-off-by: Ben Hutchings <ben@...adent.org.uk>
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
---
 Documentation/hw-vuln/spectre.rst |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

--- a/Documentation/hw-vuln/spectre.rst
+++ b/Documentation/hw-vuln/spectre.rst
@@ -468,7 +468,7 @@ Spectre variant 2
    before invoking any firmware code to prevent Spectre variant 2 exploits
    using the firmware.
 
-   Using kernel address space randomization (CONFIG_RANDOMIZE_SLAB=y
+   Using kernel address space randomization (CONFIG_RANDOMIZE_BASE=y
    and CONFIG_SLAB_FREELIST_RANDOM=y in the kernel configuration) makes
    attacks on the kernel generally more difficult.