linux-kernel - [tip:ras/urgent] RAS/CEC: Use the right length for "cec

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Date:   Thu, 5 Oct 2017 05:27:46 -0700
From:   tip-bot for Nicolas Iooss <tipbot@...or.com>
To:     linux-tip-commits@...r.kernel.org
Cc:     mingo@...nel.org, linux-kernel@...r.kernel.org,
        nicolas.iooss_linux@....org, tglx@...utronix.de, bp@...e.de,
        hpa@...or.com
Subject: [tip:ras/urgent] RAS/CEC: Use the right length for "cec_disable"

Commit-ID:  69a330007091ea8a801dd9fcd897ec52f9529586
Gitweb:     https://git.kernel.org/tip/69a330007091ea8a801dd9fcd897ec52f9529586
Author:     Nicolas Iooss <nicolas.iooss_linux@....org>
AuthorDate: Mon, 2 Oct 2017 11:28:35 +0200
Committer:  Thomas Gleixner <tglx@...utronix.de>
CommitDate: Thu, 5 Oct 2017 14:23:06 +0200

RAS/CEC: Use the right length for "cec_disable"

parse_cec_param() compares a string with "cec_disable" using only 7
characters of the 11-character-long string.

The proper solution for this would be:

#define CEC_DISABLE 	"cec_disable"

	strncmp(str, CEC_DISABLE, strlen(CEC_DISABLE))

but when comparing a string against a string constant strncmp() has no
advantage over strcmp() because the comparison is guaranteed to be bound by
the string constant. So just replace str strncmp() with strcmp().

[ tglx: Made it use strcmp and updated the changelog ]

Fixes: 011d82611172 ("RAS: Add a Corrected Errors Collector")
Signed-off-by: Nicolas Iooss <nicolas.iooss_linux@....org>
Signed-off-by: Borislav Petkov <bp@...e.de>
Signed-off-by: Thomas Gleixner <tglx@...utronix.de>
Cc: stable@...r.kernel.org
Link: http://lkml.kernel.org/r/20170903075440.30250-1-nicolas.iooss_linux@m4x.org

---
 drivers/ras/cec.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/ras/cec.c b/drivers/ras/cec.c
index d0e5d6e..e2c1988 100644
--- a/drivers/ras/cec.c
+++ b/drivers/ras/cec.c
@@ -523,7 +523,7 @@ int __init parse_cec_param(char *str)
 	if (*str == '=')
 		str++;
 
-	if (!strncmp(str, "cec_disable", 7))
+	if (!strcmp(str, "cec_disable"))
 		ce_arr.disabled = 1;
 	else
 		return 0;