From: Borislav Petkov <bp@suse.de>
Date: Wed, 1 Apr 2015 10:49:52 +0000 (+0200)
Subject: x86/mm/KASLR: Propagate KASLR status to kernel proper
X-Git-Tag: omap-for-v4.1/fixes-rc1~195^2~24
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=78cac48c0434c82e860fade3cd0420a7a4adbb08;p=pandora-kernel.git

x86/mm/KASLR: Propagate KASLR status to kernel proper

Commit:

  e2b32e678513 ("x86, kaslr: randomize module base load address")

made module base address randomization unconditional and didn't regard
disabled KKASLR due to CONFIG_HIBERNATION and command line option
"nokaslr". For more info see (now reverted) commit:

  f47233c2d34f ("x86/mm/ASLR: Propagate base load address calculation")

In order to propagate KASLR status to kernel proper, we need a single bit
in boot_params.hdr.loadflags and we've chosen bit 1 thus leaving the
top-down allocated bits for bits supposed to be used by the bootloader.

Originally-From: Jiri Kosina <jkosina@suse.cz>
Suggested-by: H. Peter Anvin <hpa@zytor.com>
Signed-off-by: Borislav Petkov <bp@suse.de>
Cc: Kees Cook <keescook@chromium.org>
Signed-off-by: Ingo Molnar <mingo@kernel.org>
---

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