From: Chen Gang <gang.chen@asianux.com>
Date: Fri, 7 Jun 2013 00:08:36 +0000 (+1000)
Subject: arch/frv/kernel/setup.c: use strncmp() instead of memcmp()
X-Git-Tag: next-20130607~2^2~262
X-Git-Url: https://git.karo-electronics.de/?a=commitdiff_plain;h=7bf12e10430358f324342cf4efdf5fbae36dadfe;p=karo-tx-linux.git

arch/frv/kernel/setup.c: use strncmp() instead of memcmp()

'cmdline' is a NUL terminated string, when its length < 4, memcmp()
will cause memory access out of boundary.

So use strncmp() instead of memcmp().

Signed-off-by: Chen Gang <gang.chen@asianux.com>
Cc: David Howells <dhowells@redhat.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
---

diff --git a/arch/frv/kernel/setup.c b/arch/frv/kernel/setup.c
index f78f8cb44093..ae3a6706419b 100644
--- a/arch/frv/kernel/setup.c
+++ b/arch/frv/kernel/setup.c
@@ -735,7 +735,7 @@ static void __init parse_cmdline_early(char *cmdline)
 		/* "mem=XXX[kKmM]" sets SDRAM size to <mem>, overriding the value we worked
 		 * out from the SDRAM controller mask register
 		 */
-		if (!memcmp(cmdline, "mem=", 4)) {
+		if (!strncmp(cmdline, "mem=", 4)) {
 			unsigned long long mem_size;
 
 			mem_size = memparse(cmdline + 4, &cmdline);