linux-kernel - [tip:x86/pti] x86/spectre: Fix an error message

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Date:   Wed, 14 Feb 2018 00:36:56 -0800
From:   tip-bot for Dan Carpenter <tipbot@...or.com>
To:     linux-tip-commits@...r.kernel.org
Cc:     torvalds@...ux-foundation.org, mingo@...nel.org,
        peterz@...radead.org, karahmed@...zon.de, bp@...e.de,
        hpa@...or.com, gregkh@...uxfoundation.org, luto@...nel.org,
        dan.carpenter@...cle.com, tglx@...utronix.de, dwmw@...zon.co.uk,
        linux-kernel@...r.kernel.org
Subject: [tip:x86/pti] x86/spectre: Fix an error message

Commit-ID:  b4764623932ff364df9a6bc8664ab7697c475339
Gitweb:     https://git.kernel.org/tip/b4764623932ff364df9a6bc8664ab7697c475339
Author:     Dan Carpenter <dan.carpenter@...cle.com>
AuthorDate: Wed, 14 Feb 2018 10:14:17 +0300
Committer:  Ingo Molnar <mingo@...nel.org>
CommitDate: Wed, 14 Feb 2018 08:23:07 +0100

x86/spectre: Fix an error message

If i == ARRAY_SIZE(mitigation_options) then we accidentally print
garbage from one space beyond the end of the mitigation_options[] array.

Signed-off-by: Dan Carpenter <dan.carpenter@...cle.com>
Cc: Andy Lutomirski <luto@...nel.org>
Cc: Borislav Petkov <bp@...e.de>
Cc: David Woodhouse <dwmw@...zon.co.uk>
Cc: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
Cc: KarimAllah Ahmed <karahmed@...zon.de>
Cc: Linus Torvalds <torvalds@...ux-foundation.org>
Cc: Peter Zijlstra <peterz@...radead.org>
Cc: Thomas Gleixner <tglx@...utronix.de>
Cc: kernel-janitors@...r.kernel.org
Fixes: 9005c6834c0f ("x86/spectre: Simplify spectre_v2 command line parsing")
Link: http://lkml.kernel.org/r/20180214071416.GA26677@mwanda
Signed-off-by: Ingo Molnar <mingo@...nel.org>
---
 arch/x86/kernel/cpu/bugs.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/arch/x86/kernel/cpu/bugs.c b/arch/x86/kernel/cpu/bugs.c
index 4acf16a..d71c8b5 100644
--- a/arch/x86/kernel/cpu/bugs.c
+++ b/arch/x86/kernel/cpu/bugs.c
@@ -174,7 +174,7 @@ static enum spectre_v2_mitigation_cmd __init spectre_v2_parse_cmdline(void)
 		}
 
 		if (i >= ARRAY_SIZE(mitigation_options)) {
-			pr_err("unknown option (%s). Switching to AUTO select\n", mitigation_options[i].option);
+			pr_err("unknown option (%s). Switching to AUTO select\n", arg);
 			return SPECTRE_V2_CMD_AUTO;
 		}
 	}