From 0c37798916bc87d72f5f1399d9e050307901db84 Mon Sep 17 00:00:00 2001
From: Kay Sievers <kay.sievers@vrfy.org>
Date: Wed, 13 May 2009 18:01:32 +0200
Subject: [PATCH] fix possible endless loop for GOTO to non-existent LABEL

http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=526365
---
 test/udev-test.pl | 11 +++++++++++
 udev/udev-rules.c |  3 +++
 2 files changed, 14 insertions(+)

diff --git a/test/udev-test.pl b/test/udev-test.pl
index 4f61ce3e..788bbeac 100755
--- a/test/udev-test.pl
+++ b/test/udev-test.pl
@@ -1554,6 +1554,17 @@ KERNEL=="sda1", GOTO="BAD"
 KERNEL=="sda1", NAME="", LABEL="NO"
 KERNEL=="sda1", NAME="right", LABEL="TEST"
 KERNEL=="sda1", LABEL="BAD"
+EOF
+	},
+	{
+		desc		=> "GOTO label does not exist",
+		subsys		=> "block",
+		devpath		=> "/devices/pci0000:00/0000:00:1f.2/host0/target0:0:0/0:0:0:0/block/sda/sda1",
+		exp_name	=> "right",
+		rules		=> <<EOF
+KERNEL=="sda1", GOTO="does-not-exist"
+KERNEL=="sda1", NAME="right",
+LABEL="exists"
 EOF
 	},
 	{
diff --git a/udev/udev-rules.c b/udev/udev-rules.c
index fac418e5..b8b7e52c 100644
--- a/udev/udev-rules.c
+++ b/udev/udev-rules.c
@@ -1610,6 +1610,7 @@ static int parse_file(struct udev_rules *rules, const char *filename, unsigned s
 				if (strcmp(label, &rules->buf[rules->tokens[j].rule.label_off]) != 0)
 					continue;
 				rules->tokens[i].key.rule_goto = j;
+				break;
 			}
 			if (rules->tokens[i].key.rule_goto == 0)
 				err(rules->udev, "GOTO '%s' has no matching label in: '%s'\n", label, filename);
@@ -2504,6 +2505,8 @@ int udev_rules_apply_to_event(struct udev_rules *rules, struct udev_event *event
 				break;
 			}
 		case TK_A_GOTO:
+			if (cur->key.rule_goto == 0)
+				break;
 			cur = &rules->tokens[cur->key.rule_goto];
 			continue;
 		case TK_A_LAST_RULE:
-- 
2.39.5