From 3bdeed02505c9bbacb3b64a97ddcb1de967153b7 Mon Sep 17 00:00:00 2001

From: Willem Toorop <willem@nlnetlabs.nl>

Date: Thu, 27 Apr 2017 00:25:20 +0200

Subject: [PATCH] bugfix #1257: Free after reallocing to 0 size

Thanks Stephan Zeisberg

---

 str2host.c | 6 ++++--

 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/str2host.c b/str2host.c

index b274b17..f2a317b 100644

--- a/str2host.c

+++ b/str2host.c

@@ -1525,8 +1525,10 @@ ldns_str2rdf_long_str(ldns_rdf **rd, const char *str)

 	if (! str) {

 		return LDNS_STATUS_SYNTAX_BAD_ESCAPE;

 	}

-	length = (size_t)(dp - data);

-

+	if (!(length = (size_t)(dp - data))) {

+		LDNS_FREE(data);

+		return LDNS_STATUS_SYNTAX_EMPTY;

+	}

 	/* Lose the overmeasure */

 	data = LDNS_XREALLOC(dp = data, uint8_t, length);

 	if (! data) {

-- 

2.9.5