From 2084fffed06f600ba7f884b00786923215a13fd9 Mon Sep 17 00:00:00 2001
From: Zhenhua Zhang <zhenhua.zhang@intel.com>
Date: Fri, 20 Aug 2010 11:10:39 +0800
Subject: udev: Add check for serial before string operation

'serial' could be NULL in some case. So it need to add check before
doing string operation.
---
 plugins/udev.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

(limited to 'plugins/udev.c')

diff --git a/plugins/udev.c b/plugins/udev.c
index 84399ded..6720a0cd 100644
--- a/plugins/udev.c
+++ b/plugins/udev.c
@@ -86,7 +86,7 @@ static const char *get_serial(struct udev_device *udev_device)
 		entry = udev_list_entry_get_next(entry);
 	}
 
-	if (strpbrk(serial, ".-_?*") != NULL)
+	if (serial && strpbrk(serial, ".-_?*") != NULL)
 		return NULL;
 
 	return serial;
-- 
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