From 91601d8c5d0dd1b6b9dfa80c6880d4bb59c25c09 Mon Sep 17 00:00:00 2001
From: "Stephen J. Kiernan" <stevek@FreeBSD.org>
Date: Thu, 1 Jun 2017 16:44:39 +0000
Subject: [PATCH] When sysctlbyname fails, free buf before returning.

Submitted by:	Thomas Rix <trix@juniper.net>
Reviewed by:	jhb
Approved by:	sjg (mentor)
MFC after:	1 week
Differential Revision:	https://reviews.freebsd.org/D9867
---
 lib/libutil/kinfo_getvmobject.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/lib/libutil/kinfo_getvmobject.c b/lib/libutil/kinfo_getvmobject.c
index 7e031dadccb0..de55650a518b 100644
--- a/lib/libutil/kinfo_getvmobject.c
+++ b/lib/libutil/kinfo_getvmobject.c
@@ -46,8 +46,10 @@ kinfo_getvmobject(int *cntp)
 
 	buf = NULL;
 	for (i = 0; i < 3; i++) {
-		if (sysctlbyname("vm.objects", NULL, &len, NULL, 0) < 0)
+		if (sysctlbyname("vm.objects", NULL, &len, NULL, 0) < 0) {
+			free(buf);
 			return (NULL);
+		}
 		buf = reallocf(buf, len);
 		if (buf == NULL)
 			return (NULL);