git.ipfire.org Git - thirdparty/kernel/stable-queue.git/blob

   1 From 82ca67321f55a8d1da6ac3ed611da3c32818bb37 Mon Sep 17 00:00:00 2001
   2 From: Lukas Bulwahn <lukas.bulwahn@gmail.com>
   3 Date: Thu, 30 Dec 2021 18:19:40 +0100
   4 Subject: Documentation: refer to config RANDOMIZE_BASE for kernel address-space randomization
   5
   6 From: Lukas Bulwahn <lukas.bulwahn@gmail.com>
   7
   8 commit 82ca67321f55a8d1da6ac3ed611da3c32818bb37 upstream.
   9
  10 The config RANDOMIZE_SLAB does not exist, the authors probably intended to
  11 refer to the config RANDOMIZE_BASE, which provides kernel address-space
  12 randomization. They probably just confused SLAB with BASE (these two
  13 four-letter words coincidentally share three common letters), as they also
  14 point out the config SLAB_FREELIST_RANDOM as further randomization within
  15 the same sentence.
  16
  17 Fix the reference of the config for kernel address-space randomization to
  18 the config that provides that.
  19
  20 Fixes: 6e88559470f5 ("Documentation: Add section about CPU vulnerabilities for Spectre")
  21 Signed-off-by: Lukas Bulwahn <lukas.bulwahn@gmail.com>
  22 Link: https://lore.kernel.org/r/20211230171940.27558-1-lukas.bulwahn@gmail.com
  23 Signed-off-by: Jonathan Corbet <corbet@lwn.net>
  24 Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
  25 ---
  26  Documentation/admin-guide/hw-vuln/spectre.rst |    2 +-
  27  1 file changed, 1 insertion(+), 1 deletion(-)
  28
  29 --- a/Documentation/admin-guide/hw-vuln/spectre.rst
  30 +++ b/Documentation/admin-guide/hw-vuln/spectre.rst
  31 @@ -468,7 +468,7 @@ Spectre variant 2
  32     before invoking any firmware code to prevent Spectre variant 2 exploits
  33     using the firmware.
  34
  35 -   Using kernel address space randomization (CONFIG_RANDOMIZE_SLAB=y
  36 +   Using kernel address space randomization (CONFIG_RANDOMIZE_BASE=y
  37     and CONFIG_SLAB_FREELIST_RANDOM=y in the kernel configuration) makes
  38     attacks on the kernel generally more difficult.
  39