From bae90071a15be813307b2a06b01f216de92953a5 Mon Sep 17 00:00:00 2001
From: bde <bde@FreeBSD.org>
Date: Sun, 30 Oct 1994 19:43:49 +0000
Subject: Don't attempt to free null cblocks.  There may be less to free than
 normal due to cblock resource starvation or malloc() failing when the device
 is opened.

---
 sys/kern/subr_clist.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

(limited to 'sys/kern/subr_clist.c')

diff --git a/sys/kern/subr_clist.c b/sys/kern/subr_clist.c
index 26f42fb..46a8f1e 100644
--- a/sys/kern/subr_clist.c
+++ b/sys/kern/subr_clist.c
@@ -6,7 +6,7 @@
  *   of this software, nor does the author assume any responsibility
  *   for damages incurred with its use.
  *
- * $Id: tty_subr.c,v 1.6 1994/09/13 16:02:20 davidg Exp $
+ * $Id: tty_subr.c,v 1.7 1994/09/25 19:33:50 phk Exp $
  */
 
 /*
@@ -118,6 +118,8 @@ cblock_free_cblocks(number)
 
 	for (i = 0; i < number; ++i) {
 		tmp = cblock_alloc();
+		if (tmp == NULL)
+			return;
 		free(tmp, M_TTYS);
 	}
 }
-- 
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