From 4daf6b361203f17f2bba43f9c52eeccc698a0c52 Mon Sep 17 00:00:00 2001

From: Pablo Greco <pablo@fliagreco.com.ar>

Date: Wed, 12 Dec 2018 16:53:10 +0000

Subject: [PATCH] Check buffer size before adding comment

---

 lib/dns/masterdump.c | 6 ++++++

 1 file changed, 6 insertions(+)

diff --git a/lib/dns/masterdump.c b/lib/dns/masterdump.c

index 80fcd4c..8e3f9e3 100644

--- a/lib/dns/masterdump.c

+++ b/lib/dns/masterdump.c

@@ -451,7 +451,13 @@ rdataset_totext(dns_rdataset_t *rdataset,

 		 * Comment?

 		 */

 		if ((ctx->style.flags & DNS_STYLEFLAG_COMMENTDATA) != 0)

+		{

+			isc_region_t r;

+			isc_buffer_availableregion(target, &r);

+			if (r.length < 1)

+				return (ISC_R_NOSPACE);

 			isc_buffer_putstr(target, ";");

+		}

 		/*

 		 * Owner name.

-- 

1.8.3.1