From: Ruben Kerkhof <ruben@rubenkerkhof.com>
Date: Fri, 4 Dec 2015 20:30:14 +0000 (+0100)
Subject: perl: Check for NULL before dereferencing
X-Git-Tag: collectd-5.5.1~31^2~5
X-Git-Url: https://git.octo.it/?a=commitdiff_plain;h=84c3e994c70aebb5ed1882a1f9cb2bfa6f64d39d;p=collectd.git

perl: Check for NULL before dereferencing

CID #38023

Signed-off-by: Florian Forster <octo@collectd.org>
---

diff --git a/src/perl.c b/src/perl.c
index 5aa96c35..67cb842b 100644
--- a/src/perl.c
+++ b/src/perl.c
@@ -1643,15 +1643,15 @@ static XS (Collectd_plugin_dispatch_values)
 
 	values = ST (/* stack index = */ 0);
 
+	if (NULL == values)
+		XSRETURN_EMPTY;
+
 	/* Make sure the argument is a hash reference. */
 	if (! (SvROK (values) && (SVt_PVHV == SvTYPE (SvRV (values))))) {
 		log_err ("Collectd::plugin_dispatch_values: Invalid values.");
 		XSRETURN_EMPTY;
 	}
 
-	if (NULL == values)
-		XSRETURN_EMPTY;
-
 	ret = pplugin_dispatch_values (aTHX_ (HV *)SvRV (values));
 
 	if (0 == ret)