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

in VT_RESIZEX handling.

Make sure that unallocated consoles don't cause us to oops
in VT_RESIZEX handling.
bc485587 · Linus Torvalds · 2d7550c8 · bc485587
Commit bc485587 authored Jun 20, 2003 by Linus Torvalds
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drivers/char/vt_ioctl.c drivers/char/vt_ioctl.c +2 -0

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--- 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)