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From f5bae2bf02aa0d8a38e02e14f27e3c4dee15077d 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 c396f547..c3afba1d 100644
--- a/str2host.c
+++ b/str2host.c
@@ -1496,8 +1496,10 @@ 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) {
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