Make sure that unallocated consoles don't cause us to oops

in VT_RESIZEX handling.

diff --git a/drivers/char/vt_ioctl.c b/drivers/char/vt_ioctl.c
index e5de162fbd870ff0fe2b4ca784a11ce73db0a987..0b985c9d3ed05f68c2e855fba30f96ba951645ee 100644 (file)
--- a/drivers/char/vt_ioctl.c
+++ b/drivers/char/vt_ioctl.c
@@ -872,6 +872,8 @@ int vt_ioctl(struct tty_struct *tty, struct file * file,
                        return -EINVAL;
                    
                for (i = 0; i < MAX_NR_CONSOLES; i++) {
+                       if (!vc_cons[i].d)
+                               continue;
                        if (vlin)
                                vc_cons[i].d->vc_scan_lines = vlin;
                        if (clin)