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>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

diff --git a/arch/frv/kernel/setup.c b/arch/frv/kernel/setup.c
index f78f8cb44093d8fdd36d04efdd975f0560b47e8c..ae3a6706419bcf5b6ada7f12c95e3b68dbdbd3d0 100644 (file)
--- 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);