linux-kernel - [PATCH] x86/kexec: Cleanup KEXEC_VERIFY

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Message-Id: <1426251877-11415-1-git-send-email-bp@alien8.de>
Date:	Fri, 13 Mar 2015 14:04:37 +0100
From:	Borislav Petkov <bp@...en8.de>
To:	LKML <linux-kernel@...r.kernel.org>
Cc:	Thomas Gleixner <tglx@...utronix.de>,
	Ingo Molnar <mingo@...hat.com>,
	"H. Peter Anvin" <hpa@...or.com>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Vivek Goyal <vgoyal@...hat.com>
Subject: [PATCH] x86/kexec: Cleanup KEXEC_VERIFY_SIG Kconfig help text

From: Borislav Petkov <bp@...e.de>

Make it much simpler without losing the gist of what it says.

Signed-off-by: Borislav Petkov <bp@...e.de>
Cc: Thomas Gleixner <tglx@...utronix.de>
Cc: Ingo Molnar <mingo@...hat.com>
Cc: "H. Peter Anvin" <hpa@...or.com>
Cc: Andrew Morton <akpm@...ux-foundation.org>
Cc: Vivek Goyal <vgoyal@...hat.com>
---
 arch/x86/Kconfig | 13 +++++--------
 1 file changed, 5 insertions(+), 8 deletions(-)

diff --git a/arch/x86/Kconfig b/arch/x86/Kconfig
index 8f829ffb9003..8db84b0e5bbd 100644
--- a/arch/x86/Kconfig
+++ b/arch/x86/Kconfig
@@ -1775,14 +1775,11 @@ config KEXEC_VERIFY_SIG
 	depends on KEXEC_FILE
 	---help---
 	  This option makes kernel signature verification mandatory for
-	  kexec_file_load() syscall. If kernel is signature can not be
-	  verified, kexec_file_load() will fail.
-
-	  This option enforces signature verification at generic level.
-	  One needs to enable signature verification for type of kernel
-	  image being loaded to make sure it works. For example, enable
-	  bzImage signature verification option to be able to load and
-	  verify signatures of bzImage. Otherwise kernel loading will fail.
+	  the kexec_file_load() syscall.
+
+	  In addition to that option, you need to enable signature
+	  verification for the corresponding kernel image type being
+	  loaded in order for this to work.
 
 config KEXEC_BZIMAGE_VERIFY_SIG
 	bool "Enable bzImage signature verification support"
-- 
2.2.0.33.gc18b867

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