From f5bae2bf02aa0d8a38e02e14f27e3c4dee15077d Mon Sep 17 00:00:00 2001 From: Willem Toorop 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) {