linux-kernel - [PATCH 2/2] s390: Fix possibly wrong size in strncmp (smsglucv)

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Date:	Sat, 29 Jan 2011 22:33:28 +0100
From:	Stefan Weil <weil@...l.berlios.de>
To:	linux390@...ibm.com
Cc:	Stefan Weil <weil@...l.berlios.de>,
	Ursula Braun <ursula.braun@...ibm.com>,
	Frank Blaschka <blaschka@...ux.vnet.ibm.com>,
	Martin Schwidefsky <schwidefsky@...ibm.com>,
	Heiko Carstens <heiko.carstens@...ibm.com>,
	linux-s390@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: [PATCH 2/2] s390: Fix possibly wrong size in strncmp (smsglucv)

This error was reported by cppcheck:
drivers/s390/net/smsgiucv.c:63: error: Using sizeof for array given as function argument returns the size of pointer.

Although there is no runtime problem as long as sizeof(u8 *) == 8,
this misleading code should get fixed.

Cc: Ursula Braun <ursula.braun@...ibm.com>
Cc: linux390@...ibm.com
Cc: Frank Blaschka <blaschka@...ux.vnet.ibm.com>
Cc: Martin Schwidefsky <schwidefsky@...ibm.com>
Cc: Heiko Carstens <heiko.carstens@...ibm.com>
Cc: linux-s390@...r.kernel.org
Cc: linux-kernel@...r.kernel.org
Signed-off-by: Stefan Weil <weil@...l.berlios.de>
---
 drivers/s390/net/smsgiucv.c |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)

diff --git a/drivers/s390/net/smsgiucv.c b/drivers/s390/net/smsgiucv.c
index 65e1cf1..207b7d7 100644
--- a/drivers/s390/net/smsgiucv.c
+++ b/drivers/s390/net/smsgiucv.c
@@ -60,7 +60,7 @@ static struct iucv_handler smsg_handler = {
 static int smsg_path_pending(struct iucv_path *path, u8 ipvmid[8],
 			     u8 ipuser[16])
 {
-	if (strncmp(ipvmid, "*MSG    ", sizeof(ipvmid)) != 0)
+	if (strncmp(ipvmid, "*MSG    ", 8) != 0)
 		return -EINVAL;
 	/* Path pending from *MSG. */
 	return iucv_path_accept(path, &smsg_handler, "SMSGIUCV        ", NULL);
-- 
1.7.2.3

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