virtio_console: Use strscpy() to instead of strncpy()

The implementation of strscpy() is more robust and safer.
That's now the recommended way to copy NUL-terminated strings.

Signed-off-by: Bo Liu <liubo03@inspur.com>
Link: https://lore.kernel.org/r/20230118012944.2436-1-liubo03@inspur.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/drivers/char/virtio_console.c b/drivers/char/virtio_console.c
index 6a82111..d5ac4d9 100644 (file)
--- a/drivers/char/virtio_console.c
+++ b/drivers/char/virtio_console.c
@@ -1666,9 +1666,8 @@ static void handle_control_message(struct virtio_device *vdev,
                                "Not enough space to store port name\n");
                        break;
                }
-               strncpy(port->name, buf->buf + buf->offset + sizeof(*cpkt),
-                       name_size - 1);
-               port->name[name_size - 1] = 0;
+               strscpy(port->name, buf->buf + buf->offset + sizeof(*cpkt),
+                       name_size);
 
                /*
                 * Since we only have one sysfs attribute, 'name',