alpha: kernel: using memcpy() instead of strcpy()

When sending message in send_secondary_console_msg(), the length is not
include the NUL byte, and also not copy NUL to 'ipc_buffer'.

When receive message in recv_secondary_console_msg(), the 'cnt' also
excludes NUL.

So when get string from ipc_buffer, it may not be NUL terminated.

Then use memcpy() instead of strcpy(), and set last byte NUL.

Reviewed-by: Matt Turner <mattst88@gmail.com>
Signed-off-by: Matt Turner <mattst88@gmail.com>
Signed-off-by: Chen Gang <gang.chen@asianux.com>

1 files changed, 2 insertions, 1 deletions

diff --git a/arch/alpha/kernel/smp.c b/arch/alpha/kernel/smp.c
index 53b18a620e1c..4bc3c414d075 100644
--- a/arch/alpha/kernel/smp.c
+++ b/arch/alpha/kernel/smp.c
@@ -266,7 +266,8 @@ recv_secondary_console_msg(void)
                 else {
                         cp1 = (char *) &cpu->ipc_buffer[11];
                         cp2 = buf;
-                        strcpy(cp2, cp1);
+                        memcpy(cp2, cp1, cnt);
+                        cp2[cnt] = '\0';
                         
                         while ((cp2 = strchr(cp2, '\r')) != 0) {
                                 *cp2 = ' ';