From f91d79f469956c423373c8747c92218c668f0ba8 Mon Sep 17 00:00:00 2001
From: Joey Hess <joey@gnu.kitenet.net>
Date: Thu, 28 Jan 2010 21:07:23 -0500
Subject: img: Fix a bug that could taint @links with undef values.

---
 IkiWiki/Plugin/img.pm | 4 ++++
 1 file changed, 4 insertions(+)

(limited to 'IkiWiki/Plugin/img.pm')

diff --git a/IkiWiki/Plugin/img.pm b/IkiWiki/Plugin/img.pm
index c1048d3c9..82db15a7e 100644
--- a/IkiWiki/Plugin/img.pm
+++ b/IkiWiki/Plugin/img.pm
@@ -26,6 +26,10 @@ sub preprocess (@) {
 	my ($image) = $_[0] =~ /$config{wiki_file_regexp}/; # untaint
 	my %params=@_;
 
+	if (! defined $image) {
+		error("bad image filename");
+	}
+
 	if (exists $imgdefaults{$params{page}}) {
 		foreach my $key (keys %{$imgdefaults{$params{page}}}) {
 			if (! exists $params{$key}) {
-- 
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